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5fd54ace | 1 | // SPDX-License-Identifier: GPL-1.0+ |
1da177e4 LT |
2 | /* |
3 | * OHCI HCD (Host Controller Driver) for USB. | |
dd9048af | 4 | * |
1da177e4 LT |
5 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
6 | * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> | |
dd9048af | 7 | * |
1da177e4 LT |
8 | * This file is licenced under GPL |
9 | */ | |
10 | ||
11 | /*-------------------------------------------------------------------------*/ | |
12 | ||
13 | /* | |
14 | * OHCI Root Hub ... the nonsharable stuff | |
15 | */ | |
16 | ||
17 | #define dbg_port(hc,label,num,value) \ | |
18 | ohci_dbg (hc, \ | |
19 | "%s roothub.portstatus [%d] " \ | |
20 | "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ | |
baa42a35 JMK |
21 | label, num, value, \ |
22 | (value & RH_PS_PRSC) ? " PRSC" : "", \ | |
23 | (value & RH_PS_OCIC) ? " OCIC" : "", \ | |
24 | (value & RH_PS_PSSC) ? " PSSC" : "", \ | |
25 | (value & RH_PS_PESC) ? " PESC" : "", \ | |
26 | (value & RH_PS_CSC) ? " CSC" : "", \ | |
dd9048af | 27 | \ |
baa42a35 JMK |
28 | (value & RH_PS_LSDA) ? " LSDA" : "", \ |
29 | (value & RH_PS_PPS) ? " PPS" : "", \ | |
30 | (value & RH_PS_PRS) ? " PRS" : "", \ | |
31 | (value & RH_PS_POCI) ? " POCI" : "", \ | |
32 | (value & RH_PS_PSS) ? " PSS" : "", \ | |
dd9048af | 33 | \ |
baa42a35 JMK |
34 | (value & RH_PS_PES) ? " PES" : "", \ |
35 | (value & RH_PS_CCS) ? " CCS" : "" \ | |
1da177e4 LT |
36 | ); |
37 | ||
38 | /*-------------------------------------------------------------------------*/ | |
39 | ||
1da177e4 LT |
40 | #define OHCI_SCHED_ENABLES \ |
41 | (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) | |
42 | ||
c6fcb85e | 43 | static void update_done_list(struct ohci_hcd *); |
cdb4dd15 | 44 | static void ohci_work(struct ohci_hcd *); |
1da177e4 | 45 | |
b1878440 | 46 | #ifdef CONFIG_PM |
8d1a243b AS |
47 | static int ohci_rh_suspend (struct ohci_hcd *ohci, int autostop) |
48 | __releases(ohci->lock) | |
49 | __acquires(ohci->lock) | |
1da177e4 | 50 | { |
1da177e4 | 51 | int status = 0; |
8de98402 | 52 | |
1da177e4 LT |
53 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
54 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
55 | case OHCI_USB_RESUME: | |
56 | ohci_dbg (ohci, "resume/suspend?\n"); | |
57 | ohci->hc_control &= ~OHCI_CTRL_HCFS; | |
58 | ohci->hc_control |= OHCI_USB_RESET; | |
59 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
60 | (void) ohci_readl (ohci, &ohci->regs->control); | |
61 | /* FALL THROUGH */ | |
62 | case OHCI_USB_RESET: | |
63 | status = -EBUSY; | |
64 | ohci_dbg (ohci, "needs reinit!\n"); | |
65 | goto done; | |
66 | case OHCI_USB_SUSPEND: | |
8d1a243b AS |
67 | if (!ohci->autostop) { |
68 | ohci_dbg (ohci, "already suspended\n"); | |
69 | goto done; | |
70 | } | |
1da177e4 | 71 | } |
8d1a243b AS |
72 | ohci_dbg (ohci, "%s root hub\n", |
73 | autostop ? "auto-stop" : "suspend"); | |
1da177e4 LT |
74 | |
75 | /* First stop any processing */ | |
8d1a243b | 76 | if (!autostop && (ohci->hc_control & OHCI_SCHED_ENABLES)) { |
1da177e4 LT |
77 | ohci->hc_control &= ~OHCI_SCHED_ENABLES; |
78 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
79 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); | |
80 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrstatus); | |
81 | ||
82 | /* sched disables take effect on the next frame, | |
83 | * then the last WDH could take 6+ msec | |
84 | */ | |
85 | ohci_dbg (ohci, "stopping schedules ...\n"); | |
8d1a243b AS |
86 | ohci->autostop = 0; |
87 | spin_unlock_irq (&ohci->lock); | |
88 | msleep (8); | |
89 | spin_lock_irq (&ohci->lock); | |
1da177e4 | 90 | } |
c6fcb85e | 91 | update_done_list(ohci); |
cdb4dd15 | 92 | ohci_work(ohci); |
1da177e4 | 93 | |
c1db30a2 AS |
94 | /* |
95 | * Some controllers don't handle "global" suspend properly if | |
96 | * there are unsuspended ports. For these controllers, put all | |
97 | * the enabled ports into suspend before suspending the root hub. | |
98 | */ | |
99 | if (ohci->flags & OHCI_QUIRK_GLOBAL_SUSPEND) { | |
100 | __hc32 __iomem *portstat = ohci->regs->roothub.portstatus; | |
101 | int i; | |
102 | unsigned temp; | |
103 | ||
104 | for (i = 0; i < ohci->num_ports; (++i, ++portstat)) { | |
105 | temp = ohci_readl(ohci, portstat); | |
106 | if ((temp & (RH_PS_PES | RH_PS_PSS)) == | |
107 | RH_PS_PES) | |
108 | ohci_writel(ohci, RH_PS_PSS, portstat); | |
109 | } | |
110 | } | |
111 | ||
1da177e4 | 112 | /* maybe resume can wake root hub */ |
58a97ffe | 113 | if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) { |
1da177e4 | 114 | ohci->hc_control |= OHCI_CTRL_RWE; |
58a97ffe | 115 | } else { |
5f47493c AS |
116 | ohci_writel(ohci, OHCI_INTR_RHSC | OHCI_INTR_RD, |
117 | &ohci->regs->intrdisable); | |
1da177e4 | 118 | ohci->hc_control &= ~OHCI_CTRL_RWE; |
1f7e1a3b | 119 | } |
1da177e4 | 120 | |
f197b2c5 DB |
121 | /* Suspend hub ... this is the "global (to this bus) suspend" mode, |
122 | * which doesn't imply ports will first be individually suspended. | |
123 | */ | |
1da177e4 LT |
124 | ohci->hc_control &= ~OHCI_CTRL_HCFS; |
125 | ohci->hc_control |= OHCI_USB_SUSPEND; | |
126 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
127 | (void) ohci_readl (ohci, &ohci->regs->control); | |
128 | ||
129 | /* no resumes until devices finish suspending */ | |
8d1a243b AS |
130 | if (!autostop) { |
131 | ohci->next_statechange = jiffies + msecs_to_jiffies (5); | |
132 | ohci->autostop = 0; | |
b7463c71 | 133 | ohci->rh_state = OHCI_RH_SUSPENDED; |
8d1a243b | 134 | } |
d413984a | 135 | |
1da177e4 | 136 | done: |
1da177e4 LT |
137 | return status; |
138 | } | |
139 | ||
140 | static inline struct ed *find_head (struct ed *ed) | |
141 | { | |
142 | /* for bulk and control lists */ | |
143 | while (ed->ed_prev) | |
144 | ed = ed->ed_prev; | |
145 | return ed; | |
146 | } | |
147 | ||
148 | /* caller has locked the root hub */ | |
8d1a243b AS |
149 | static int ohci_rh_resume (struct ohci_hcd *ohci) |
150 | __releases(ohci->lock) | |
151 | __acquires(ohci->lock) | |
1da177e4 | 152 | { |
8d1a243b | 153 | struct usb_hcd *hcd = ohci_to_hcd (ohci); |
1da177e4 LT |
154 | u32 temp, enables; |
155 | int status = -EINPROGRESS; | |
8d1a243b | 156 | int autostopped = ohci->autostop; |
8de98402 | 157 | |
8d1a243b | 158 | ohci->autostop = 0; |
1da177e4 LT |
159 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
160 | ||
161 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
f197b2c5 | 162 | /* this can happen after resuming a swsusp snapshot */ |
b7463c71 | 163 | if (ohci->rh_state != OHCI_RH_RUNNING) { |
1da177e4 LT |
164 | ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", |
165 | ohci->hc_control); | |
166 | status = -EBUSY; | |
167 | /* this happens when pmcore resumes HC then root */ | |
168 | } else { | |
169 | ohci_dbg (ohci, "duplicate resume\n"); | |
170 | status = 0; | |
171 | } | |
172 | } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
173 | case OHCI_USB_SUSPEND: | |
174 | ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); | |
175 | ohci->hc_control |= OHCI_USB_RESUME; | |
176 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
177 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
178 | ohci_dbg (ohci, "%s root hub\n", |
179 | autostopped ? "auto-start" : "resume"); | |
1da177e4 LT |
180 | break; |
181 | case OHCI_USB_RESUME: | |
182 | /* HCFS changes sometime after INTR_RD */ | |
1b7be3c0 | 183 | ohci_dbg(ohci, "%swakeup root hub\n", |
583ceada | 184 | autostopped ? "auto-" : ""); |
1da177e4 LT |
185 | break; |
186 | case OHCI_USB_OPER: | |
f197b2c5 DB |
187 | /* this can happen after resuming a swsusp snapshot */ |
188 | ohci_dbg (ohci, "snapshot resume? reinit\n"); | |
189 | status = -EBUSY; | |
1da177e4 LT |
190 | break; |
191 | default: /* RESET, we lost power */ | |
f197b2c5 | 192 | ohci_dbg (ohci, "lost power\n"); |
1da177e4 LT |
193 | status = -EBUSY; |
194 | } | |
1da177e4 | 195 | if (status == -EBUSY) { |
8d1a243b | 196 | if (!autostopped) { |
8d1a243b | 197 | spin_unlock_irq (&ohci->lock); |
8d1a243b | 198 | status = ohci_restart (ohci); |
d576bb9f MH |
199 | |
200 | usb_root_hub_lost_power(hcd->self.root_hub); | |
201 | ||
8d1a243b AS |
202 | spin_lock_irq (&ohci->lock); |
203 | } | |
204 | return status; | |
1da177e4 LT |
205 | } |
206 | if (status != -EINPROGRESS) | |
207 | return status; | |
8d1a243b AS |
208 | if (autostopped) |
209 | goto skip_resume; | |
210 | spin_unlock_irq (&ohci->lock); | |
1da177e4 | 211 | |
1da177e4 | 212 | /* Some controllers (lucent erratum) need extra-long delays */ |
f197b2c5 | 213 | msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); |
1da177e4 LT |
214 | |
215 | temp = ohci_readl (ohci, &ohci->regs->control); | |
216 | temp &= OHCI_CTRL_HCFS; | |
217 | if (temp != OHCI_USB_RESUME) { | |
218 | ohci_err (ohci, "controller won't resume\n"); | |
565402ba | 219 | spin_lock_irq(&ohci->lock); |
1da177e4 LT |
220 | return -EBUSY; |
221 | } | |
222 | ||
223 | /* disable old schedule state, reinit from scratch */ | |
224 | ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); | |
225 | ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); | |
226 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); | |
227 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); | |
228 | ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); | |
229 | ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); | |
230 | ||
231 | /* Sometimes PCI D3 suspend trashes frame timings ... */ | |
232 | periodic_reinit (ohci); | |
233 | ||
7c71c6e6 AS |
234 | /* |
235 | * The following code is executed with ohci->lock held and | |
236 | * irqs disabled if and only if autostopped is true. This | |
237 | * will cause sparse to warn about a "context imbalance". | |
8d1a243b | 238 | */ |
8d1a243b | 239 | skip_resume: |
1da177e4 LT |
240 | /* interrupts might have been disabled */ |
241 | ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); | |
242 | if (ohci->ed_rm_list) | |
243 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); | |
1da177e4 LT |
244 | |
245 | /* Then re-enable operations */ | |
246 | ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); | |
247 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
248 | if (!autostopped) |
249 | msleep (3); | |
1da177e4 | 250 | |
6a9062f3 DB |
251 | temp = ohci->hc_control; |
252 | temp &= OHCI_CTRL_RWC; | |
253 | temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; | |
1da177e4 LT |
254 | ohci->hc_control = temp; |
255 | ohci_writel (ohci, temp, &ohci->regs->control); | |
256 | (void) ohci_readl (ohci, &ohci->regs->control); | |
257 | ||
258 | /* TRSMRCY */ | |
8d1a243b AS |
259 | if (!autostopped) { |
260 | msleep (10); | |
261 | spin_lock_irq (&ohci->lock); | |
262 | } | |
263 | /* now ohci->lock is always held and irqs are always disabled */ | |
1da177e4 | 264 | |
d413984a DB |
265 | /* keep it alive for more than ~5x suspend + resume costs */ |
266 | ohci->next_statechange = jiffies + STATECHANGE_DELAY; | |
1da177e4 LT |
267 | |
268 | /* maybe turn schedules back on */ | |
269 | enables = 0; | |
270 | temp = 0; | |
271 | if (!ohci->ed_rm_list) { | |
272 | if (ohci->ed_controltail) { | |
273 | ohci_writel (ohci, | |
274 | find_head (ohci->ed_controltail)->dma, | |
275 | &ohci->regs->ed_controlhead); | |
276 | enables |= OHCI_CTRL_CLE; | |
277 | temp |= OHCI_CLF; | |
278 | } | |
279 | if (ohci->ed_bulktail) { | |
280 | ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, | |
281 | &ohci->regs->ed_bulkhead); | |
282 | enables |= OHCI_CTRL_BLE; | |
283 | temp |= OHCI_BLF; | |
284 | } | |
285 | } | |
286 | if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) | |
287 | enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; | |
288 | if (enables) { | |
289 | ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); | |
290 | ohci->hc_control |= enables; | |
291 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
292 | if (temp) | |
293 | ohci_writel (ohci, temp, &ohci->regs->cmdstatus); | |
294 | (void) ohci_readl (ohci, &ohci->regs->control); | |
295 | } | |
296 | ||
b7463c71 | 297 | ohci->rh_state = OHCI_RH_RUNNING; |
1da177e4 LT |
298 | return 0; |
299 | } | |
300 | ||
8d1a243b AS |
301 | static int ohci_bus_suspend (struct usb_hcd *hcd) |
302 | { | |
303 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
304 | int rc; | |
305 | ||
306 | spin_lock_irq (&ohci->lock); | |
307 | ||
541c7d43 | 308 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
309 | rc = -ESHUTDOWN; |
310 | else | |
311 | rc = ohci_rh_suspend (ohci, 0); | |
312 | spin_unlock_irq (&ohci->lock); | |
81e38333 AS |
313 | |
314 | if (rc == 0) | |
315 | del_timer_sync(&ohci->io_watchdog); | |
8d1a243b AS |
316 | return rc; |
317 | } | |
318 | ||
319 | static int ohci_bus_resume (struct usb_hcd *hcd) | |
320 | { | |
321 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
322 | int rc; | |
323 | ||
324 | if (time_before (jiffies, ohci->next_statechange)) | |
325 | msleep(5); | |
326 | ||
327 | spin_lock_irq (&ohci->lock); | |
328 | ||
541c7d43 | 329 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
330 | rc = -ESHUTDOWN; |
331 | else | |
332 | rc = ohci_rh_resume (ohci); | |
333 | spin_unlock_irq (&ohci->lock); | |
334 | ||
335 | /* poll until we know a device is connected or we autostop */ | |
336 | if (rc == 0) | |
337 | usb_hcd_poll_rh_status(hcd); | |
338 | return rc; | |
339 | } | |
340 | ||
1f9fc882 AS |
341 | /* Carry out polling-, autostop-, and autoresume-related state changes */ |
342 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 343 | int any_connected, int rhsc_status) |
1f9fc882 AS |
344 | { |
345 | int poll_rh = 1; | |
71b7497c | 346 | int rhsc_enable; |
1f9fc882 | 347 | |
ee0b9be8 | 348 | /* Some broken controllers never turn off RHSC in the interrupt |
4a511bc3 AS |
349 | * status register. For their sake we won't re-enable RHSC |
350 | * interrupts if the interrupt bit is already active. | |
351 | */ | |
4a511bc3 AS |
352 | rhsc_enable = ohci_readl(ohci, &ohci->regs->intrenable) & |
353 | OHCI_INTR_RHSC; | |
1f9fc882 | 354 | |
4a511bc3 | 355 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { |
1f9fc882 | 356 | case OHCI_USB_OPER: |
4a511bc3 AS |
357 | /* If no status changes are pending, enable RHSC interrupts. */ |
358 | if (!rhsc_enable && !rhsc_status && !changed) { | |
359 | rhsc_enable = OHCI_INTR_RHSC; | |
360 | ohci_writel(ohci, rhsc_enable, &ohci->regs->intrenable); | |
b5fb454f AS |
361 | } |
362 | ||
363 | /* Keep on polling until we know a device is connected | |
364 | * and RHSC is enabled, or until we autostop. | |
365 | */ | |
1f9fc882 AS |
366 | if (!ohci->autostop) { |
367 | if (any_connected || | |
368 | !device_may_wakeup(&ohci_to_hcd(ohci) | |
369 | ->self.root_hub->dev)) { | |
4a511bc3 | 370 | if (rhsc_enable) |
1f9fc882 AS |
371 | poll_rh = 0; |
372 | } else { | |
373 | ohci->autostop = 1; | |
374 | ohci->next_statechange = jiffies + HZ; | |
375 | } | |
376 | ||
377 | /* if no devices have been attached for one second, autostop */ | |
378 | } else { | |
379 | if (changed || any_connected) { | |
380 | ohci->autostop = 0; | |
381 | ohci->next_statechange = jiffies + | |
382 | STATECHANGE_DELAY; | |
4a511bc3 | 383 | } else if (time_after_eq(jiffies, |
1f9fc882 AS |
384 | ohci->next_statechange) |
385 | && !ohci->ed_rm_list | |
386 | && !(ohci->hc_control & | |
387 | OHCI_SCHED_ENABLES)) { | |
388 | ohci_rh_suspend(ohci, 1); | |
4a511bc3 AS |
389 | if (rhsc_enable) |
390 | poll_rh = 0; | |
1f9fc882 AS |
391 | } |
392 | } | |
393 | break; | |
394 | ||
1f9fc882 AS |
395 | case OHCI_USB_SUSPEND: |
396 | case OHCI_USB_RESUME: | |
4a511bc3 | 397 | /* if there is a port change, autostart or ask to be resumed */ |
1f9fc882 AS |
398 | if (changed) { |
399 | if (ohci->autostop) | |
400 | ohci_rh_resume(ohci); | |
401 | else | |
402 | usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); | |
71b7497c AS |
403 | |
404 | /* If remote wakeup is disabled, stop polling */ | |
405 | } else if (!ohci->autostop && | |
406 | !ohci_to_hcd(ohci)->self.root_hub-> | |
407 | do_remote_wakeup) { | |
408 | poll_rh = 0; | |
409 | ||
1f9fc882 | 410 | } else { |
71b7497c AS |
411 | /* If no status changes are pending, |
412 | * enable RHSC interrupts | |
413 | */ | |
414 | if (!rhsc_enable && !rhsc_status) { | |
4a511bc3 AS |
415 | rhsc_enable = OHCI_INTR_RHSC; |
416 | ohci_writel(ohci, rhsc_enable, | |
b5fb454f | 417 | &ohci->regs->intrenable); |
4a511bc3 | 418 | } |
71b7497c | 419 | /* Keep polling until RHSC is enabled */ |
4a511bc3 AS |
420 | if (rhsc_enable) |
421 | poll_rh = 0; | |
1f9fc882 AS |
422 | } |
423 | break; | |
424 | } | |
425 | return poll_rh; | |
426 | } | |
427 | ||
428 | #else /* CONFIG_PM */ | |
429 | ||
430 | static inline int ohci_rh_resume(struct ohci_hcd *ohci) | |
431 | { | |
432 | return 0; | |
433 | } | |
434 | ||
435 | /* Carry out polling-related state changes. | |
436 | * autostop isn't used when CONFIG_PM is turned off. | |
437 | */ | |
438 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 439 | int any_connected, int rhsc_status) |
1f9fc882 | 440 | { |
b5fb454f | 441 | /* If RHSC is enabled, don't poll */ |
09ca8adb | 442 | if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) |
b5fb454f AS |
443 | return 0; |
444 | ||
71b7497c AS |
445 | /* If status changes are pending, continue polling. |
446 | * Conversely, if no status changes are pending but the RHSC | |
447 | * status bit was set, then RHSC may be broken so continue polling. | |
448 | */ | |
449 | if (changed || rhsc_status) | |
450 | return 1; | |
451 | ||
452 | /* It's safe to re-enable RHSC interrupts */ | |
453 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); | |
454 | return 0; | |
1f9fc882 AS |
455 | } |
456 | ||
8ad7fe16 | 457 | #endif /* CONFIG_PM */ |
1da177e4 LT |
458 | |
459 | /*-------------------------------------------------------------------------*/ | |
460 | ||
461 | /* build "status change" packet (one or two bytes) from HC registers */ | |
462 | ||
42b59eba | 463 | int ohci_hub_status_data(struct usb_hcd *hcd, char *buf) |
1da177e4 LT |
464 | { |
465 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fdd13b36 | 466 | int i, changed = 0, length = 1; |
052ac01a | 467 | int any_connected = 0; |
71b7497c | 468 | int rhsc_status; |
1da177e4 LT |
469 | unsigned long flags; |
470 | ||
471 | spin_lock_irqsave (&ohci->lock, flags); | |
541c7d43 | 472 | if (!HCD_HW_ACCESSIBLE(hcd)) |
6fd75b19 | 473 | goto done; |
1da177e4 | 474 | |
fdd13b36 DB |
475 | /* undocumented erratum seen on at least rev D */ |
476 | if ((ohci->flags & OHCI_QUIRK_AMD756) | |
477 | && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { | |
478 | ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", | |
1da177e4 LT |
479 | ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); |
480 | /* retry later; "should not happen" */ | |
481 | goto done; | |
482 | } | |
483 | ||
484 | /* init status */ | |
485 | if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) | |
486 | buf [0] = changed = 1; | |
487 | else | |
488 | buf [0] = 0; | |
fdd13b36 | 489 | if (ohci->num_ports > 7) { |
1da177e4 LT |
490 | buf [1] = 0; |
491 | length++; | |
492 | } | |
493 | ||
71b7497c AS |
494 | /* Clear the RHSC status flag before reading the port statuses */ |
495 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrstatus); | |
496 | rhsc_status = ohci_readl(ohci, &ohci->regs->intrstatus) & | |
497 | OHCI_INTR_RHSC; | |
498 | ||
1da177e4 | 499 | /* look at each port */ |
fdd13b36 | 500 | for (i = 0; i < ohci->num_ports; i++) { |
1da177e4 LT |
501 | u32 status = roothub_portstatus (ohci, i); |
502 | ||
8d1a243b AS |
503 | /* can't autostop if ports are connected */ |
504 | any_connected |= (status & RH_PS_CCS); | |
505 | ||
1da177e4 LT |
506 | if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC |
507 | | RH_PS_OCIC | RH_PS_PRSC)) { | |
508 | changed = 1; | |
509 | if (i < 7) | |
510 | buf [0] |= 1 << (i + 1); | |
511 | else | |
512 | buf [1] |= 1 << (i - 7); | |
1da177e4 | 513 | } |
d413984a | 514 | } |
1da177e4 | 515 | |
541c7d43 AS |
516 | if (ohci_root_hub_state_changes(ohci, changed, |
517 | any_connected, rhsc_status)) | |
518 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
519 | else | |
520 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
521 | ||
d413984a | 522 | |
1da177e4 LT |
523 | done: |
524 | spin_unlock_irqrestore (&ohci->lock, flags); | |
525 | ||
1da177e4 LT |
526 | return changed ? length : 0; |
527 | } | |
42b59eba | 528 | EXPORT_SYMBOL_GPL(ohci_hub_status_data); |
1da177e4 LT |
529 | |
530 | /*-------------------------------------------------------------------------*/ | |
531 | ||
532 | static void | |
533 | ohci_hub_descriptor ( | |
534 | struct ohci_hcd *ohci, | |
535 | struct usb_hub_descriptor *desc | |
536 | ) { | |
537 | u32 rh = roothub_a (ohci); | |
1da177e4 LT |
538 | u16 temp; |
539 | ||
7a2d2672 | 540 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
541 | desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; |
542 | desc->bHubContrCurrent = 0; | |
543 | ||
fdd13b36 DB |
544 | desc->bNbrPorts = ohci->num_ports; |
545 | temp = 1 + (ohci->num_ports / 8); | |
1da177e4 LT |
546 | desc->bDescLength = 7 + 2 * temp; |
547 | ||
db42a4c9 | 548 | temp = HUB_CHAR_COMMON_LPSM | HUB_CHAR_COMMON_OCPM; |
1da177e4 | 549 | if (rh & RH_A_NPS) /* no power switching? */ |
db42a4c9 | 550 | temp |= HUB_CHAR_NO_LPSM; |
dd9048af | 551 | if (rh & RH_A_PSM) /* per-port power switching? */ |
db42a4c9 | 552 | temp |= HUB_CHAR_INDV_PORT_LPSM; |
1da177e4 | 553 | if (rh & RH_A_NOCP) /* no overcurrent reporting? */ |
db42a4c9 | 554 | temp |= HUB_CHAR_NO_OCPM; |
1da177e4 | 555 | else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ |
db42a4c9 | 556 | temp |= HUB_CHAR_INDV_PORT_OCPM; |
7c71c6e6 | 557 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 | 558 | |
da13051c | 559 | /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
1da177e4 | 560 | rh = roothub_b (ohci); |
dbe79bbe JY |
561 | memset(desc->u.hs.DeviceRemovable, 0xff, |
562 | sizeof(desc->u.hs.DeviceRemovable)); | |
563 | desc->u.hs.DeviceRemovable[0] = rh & RH_B_DR; | |
fdd13b36 | 564 | if (ohci->num_ports > 7) { |
dbe79bbe JY |
565 | desc->u.hs.DeviceRemovable[1] = (rh & RH_B_DR) >> 8; |
566 | desc->u.hs.DeviceRemovable[2] = 0xff; | |
1da177e4 | 567 | } else |
dbe79bbe | 568 | desc->u.hs.DeviceRemovable[1] = 0xff; |
1da177e4 LT |
569 | } |
570 | ||
571 | /*-------------------------------------------------------------------------*/ | |
572 | ||
573 | #ifdef CONFIG_USB_OTG | |
574 | ||
575 | static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) | |
576 | { | |
577 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
578 | u32 status; | |
579 | ||
580 | if (!port) | |
581 | return -EINVAL; | |
582 | port--; | |
583 | ||
584 | /* start port reset before HNP protocol times out */ | |
585 | status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); | |
586 | if (!(status & RH_PS_CCS)) | |
587 | return -ENODEV; | |
588 | ||
37ebb549 | 589 | /* hub_wq will finish the reset later */ |
1da177e4 LT |
590 | ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); |
591 | return 0; | |
592 | } | |
593 | ||
1da177e4 LT |
594 | #else |
595 | ||
596 | #define ohci_start_port_reset NULL | |
597 | ||
598 | #endif | |
599 | ||
600 | /*-------------------------------------------------------------------------*/ | |
601 | ||
602 | ||
603 | /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, | |
604 | * not necessarily continuous ... to guard against resume signaling. | |
1da177e4 | 605 | */ |
1da177e4 | 606 | #define PORT_RESET_MSEC 50 |
1da177e4 LT |
607 | |
608 | /* this timer value might be vendor-specific ... */ | |
609 | #define PORT_RESET_HW_MSEC 10 | |
610 | ||
611 | /* wrap-aware logic morphed from <linux/jiffies.h> */ | |
612 | #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) | |
613 | ||
37ebb549 | 614 | /* called from some task, normally hub_wq */ |
23d10a9e | 615 | static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) |
1da177e4 LT |
616 | { |
617 | __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; | |
1b7b61c5 | 618 | u32 temp = 0; |
1da177e4 LT |
619 | u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); |
620 | u16 reset_done = now + PORT_RESET_MSEC; | |
e01e7fe3 | 621 | int limit_1 = DIV_ROUND_UP(PORT_RESET_MSEC, PORT_RESET_HW_MSEC); |
1da177e4 LT |
622 | |
623 | /* build a "continuous enough" reset signal, with up to | |
624 | * 3msec gap between pulses. scheduler HZ==100 must work; | |
625 | * this might need to be deadline-scheduled. | |
626 | */ | |
627 | do { | |
e01e7fe3 DB |
628 | int limit_2; |
629 | ||
1da177e4 | 630 | /* spin until any current reset finishes */ |
e01e7fe3 DB |
631 | limit_2 = PORT_RESET_HW_MSEC * 2; |
632 | while (--limit_2 >= 0) { | |
1da177e4 | 633 | temp = ohci_readl (ohci, portstat); |
23d10a9e TO |
634 | /* handle e.g. CardBus eject */ |
635 | if (temp == ~(u32)0) | |
636 | return -ESHUTDOWN; | |
1da177e4 LT |
637 | if (!(temp & RH_PS_PRS)) |
638 | break; | |
639 | udelay (500); | |
dd9048af | 640 | } |
1da177e4 | 641 | |
e01e7fe3 DB |
642 | /* timeout (a hardware error) has been observed when |
643 | * EHCI sets CF while this driver is resetting a port; | |
644 | * presumably other disconnect paths might do it too. | |
645 | */ | |
646 | if (limit_2 < 0) { | |
647 | ohci_dbg(ohci, | |
648 | "port[%d] reset timeout, stat %08x\n", | |
649 | port, temp); | |
650 | break; | |
651 | } | |
652 | ||
1da177e4 LT |
653 | if (!(temp & RH_PS_CCS)) |
654 | break; | |
655 | if (temp & RH_PS_PRSC) | |
656 | ohci_writel (ohci, RH_PS_PRSC, portstat); | |
657 | ||
658 | /* start the next reset, sleep till it's probably done */ | |
659 | ohci_writel (ohci, RH_PS_PRS, portstat); | |
660 | msleep(PORT_RESET_HW_MSEC); | |
661 | now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
e01e7fe3 DB |
662 | } while (tick_before(now, reset_done) && --limit_1 >= 0); |
663 | ||
664 | /* caller synchronizes using PRSC ... and handles PRS | |
665 | * still being set when this returns. | |
666 | */ | |
23d10a9e TO |
667 | |
668 | return 0; | |
1da177e4 LT |
669 | } |
670 | ||
42b59eba | 671 | int ohci_hub_control( |
1da177e4 LT |
672 | struct usb_hcd *hcd, |
673 | u16 typeReq, | |
674 | u16 wValue, | |
675 | u16 wIndex, | |
676 | char *buf, | |
677 | u16 wLength | |
678 | ) { | |
679 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fcf7d214 | 680 | int ports = ohci->num_ports; |
1da177e4 LT |
681 | u32 temp; |
682 | int retval = 0; | |
683 | ||
541c7d43 | 684 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8de98402 BH |
685 | return -ESHUTDOWN; |
686 | ||
1da177e4 LT |
687 | switch (typeReq) { |
688 | case ClearHubFeature: | |
689 | switch (wValue) { | |
690 | case C_HUB_OVER_CURRENT: | |
691 | ohci_writel (ohci, RH_HS_OCIC, | |
692 | &ohci->regs->roothub.status); | |
693 | case C_HUB_LOCAL_POWER: | |
694 | break; | |
695 | default: | |
696 | goto error; | |
697 | } | |
698 | break; | |
699 | case ClearPortFeature: | |
700 | if (!wIndex || wIndex > ports) | |
701 | goto error; | |
702 | wIndex--; | |
703 | ||
704 | switch (wValue) { | |
705 | case USB_PORT_FEAT_ENABLE: | |
706 | temp = RH_PS_CCS; | |
707 | break; | |
708 | case USB_PORT_FEAT_C_ENABLE: | |
709 | temp = RH_PS_PESC; | |
710 | break; | |
711 | case USB_PORT_FEAT_SUSPEND: | |
712 | temp = RH_PS_POCI; | |
1da177e4 LT |
713 | break; |
714 | case USB_PORT_FEAT_C_SUSPEND: | |
715 | temp = RH_PS_PSSC; | |
716 | break; | |
717 | case USB_PORT_FEAT_POWER: | |
718 | temp = RH_PS_LSDA; | |
719 | break; | |
720 | case USB_PORT_FEAT_C_CONNECTION: | |
721 | temp = RH_PS_CSC; | |
722 | break; | |
723 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
724 | temp = RH_PS_OCIC; | |
725 | break; | |
726 | case USB_PORT_FEAT_C_RESET: | |
727 | temp = RH_PS_PRSC; | |
728 | break; | |
729 | default: | |
730 | goto error; | |
731 | } | |
732 | ohci_writel (ohci, temp, | |
733 | &ohci->regs->roothub.portstatus [wIndex]); | |
734 | // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); | |
735 | break; | |
736 | case GetHubDescriptor: | |
737 | ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); | |
738 | break; | |
739 | case GetHubStatus: | |
740 | temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); | |
a5abdeaf | 741 | put_unaligned_le32(temp, buf); |
1da177e4 LT |
742 | break; |
743 | case GetPortStatus: | |
744 | if (!wIndex || wIndex > ports) | |
745 | goto error; | |
746 | wIndex--; | |
747 | temp = roothub_portstatus (ohci, wIndex); | |
a5abdeaf | 748 | put_unaligned_le32(temp, buf); |
1da177e4 | 749 | |
00b033bb ON |
750 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ |
751 | dbg_port(ohci, "GetStatus", wIndex, temp); | |
1da177e4 LT |
752 | break; |
753 | case SetHubFeature: | |
754 | switch (wValue) { | |
755 | case C_HUB_OVER_CURRENT: | |
756 | // FIXME: this can be cleared, yes? | |
757 | case C_HUB_LOCAL_POWER: | |
758 | break; | |
759 | default: | |
760 | goto error; | |
761 | } | |
762 | break; | |
763 | case SetPortFeature: | |
764 | if (!wIndex || wIndex > ports) | |
765 | goto error; | |
766 | wIndex--; | |
767 | switch (wValue) { | |
768 | case USB_PORT_FEAT_SUSPEND: | |
769 | #ifdef CONFIG_USB_OTG | |
770 | if (hcd->self.otg_port == (wIndex + 1) | |
771 | && hcd->self.b_hnp_enable) | |
e8b24450 | 772 | ohci->start_hnp(ohci); |
1da177e4 LT |
773 | else |
774 | #endif | |
775 | ohci_writel (ohci, RH_PS_PSS, | |
776 | &ohci->regs->roothub.portstatus [wIndex]); | |
777 | break; | |
778 | case USB_PORT_FEAT_POWER: | |
779 | ohci_writel (ohci, RH_PS_PPS, | |
780 | &ohci->regs->roothub.portstatus [wIndex]); | |
781 | break; | |
782 | case USB_PORT_FEAT_RESET: | |
23d10a9e | 783 | retval = root_port_reset (ohci, wIndex); |
1da177e4 LT |
784 | break; |
785 | default: | |
786 | goto error; | |
787 | } | |
788 | break; | |
789 | ||
790 | default: | |
791 | error: | |
792 | /* "protocol stall" on error */ | |
793 | retval = -EPIPE; | |
794 | } | |
795 | return retval; | |
796 | } | |
42b59eba | 797 | EXPORT_SYMBOL_GPL(ohci_hub_control); |