Commit | Line | Data |
---|---|---|
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); | |
e288fc98 | 61 | fallthrough; |
1da177e4 LT |
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 | |
20f588ac YZ |
94 | /* All ED unlinks should be finished, no need for SOF interrupts */ |
95 | ohci_writel(ohci, OHCI_INTR_SF, &ohci->regs->intrdisable); | |
96 | ||
c1db30a2 AS |
97 | /* |
98 | * Some controllers don't handle "global" suspend properly if | |
99 | * there are unsuspended ports. For these controllers, put all | |
100 | * the enabled ports into suspend before suspending the root hub. | |
101 | */ | |
102 | if (ohci->flags & OHCI_QUIRK_GLOBAL_SUSPEND) { | |
103 | __hc32 __iomem *portstat = ohci->regs->roothub.portstatus; | |
104 | int i; | |
105 | unsigned temp; | |
106 | ||
107 | for (i = 0; i < ohci->num_ports; (++i, ++portstat)) { | |
108 | temp = ohci_readl(ohci, portstat); | |
109 | if ((temp & (RH_PS_PES | RH_PS_PSS)) == | |
110 | RH_PS_PES) | |
111 | ohci_writel(ohci, RH_PS_PSS, portstat); | |
112 | } | |
113 | } | |
114 | ||
1da177e4 | 115 | /* maybe resume can wake root hub */ |
58a97ffe | 116 | if (ohci_to_hcd(ohci)->self.root_hub->do_remote_wakeup || autostop) { |
1da177e4 | 117 | ohci->hc_control |= OHCI_CTRL_RWE; |
58a97ffe | 118 | } else { |
5f47493c AS |
119 | ohci_writel(ohci, OHCI_INTR_RHSC | OHCI_INTR_RD, |
120 | &ohci->regs->intrdisable); | |
1da177e4 | 121 | ohci->hc_control &= ~OHCI_CTRL_RWE; |
1f7e1a3b | 122 | } |
1da177e4 | 123 | |
f197b2c5 DB |
124 | /* Suspend hub ... this is the "global (to this bus) suspend" mode, |
125 | * which doesn't imply ports will first be individually suspended. | |
126 | */ | |
1da177e4 LT |
127 | ohci->hc_control &= ~OHCI_CTRL_HCFS; |
128 | ohci->hc_control |= OHCI_USB_SUSPEND; | |
129 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
130 | (void) ohci_readl (ohci, &ohci->regs->control); | |
131 | ||
132 | /* no resumes until devices finish suspending */ | |
8d1a243b AS |
133 | if (!autostop) { |
134 | ohci->next_statechange = jiffies + msecs_to_jiffies (5); | |
135 | ohci->autostop = 0; | |
b7463c71 | 136 | ohci->rh_state = OHCI_RH_SUSPENDED; |
8d1a243b | 137 | } |
d413984a | 138 | |
1da177e4 | 139 | done: |
1da177e4 LT |
140 | return status; |
141 | } | |
142 | ||
143 | static inline struct ed *find_head (struct ed *ed) | |
144 | { | |
145 | /* for bulk and control lists */ | |
146 | while (ed->ed_prev) | |
147 | ed = ed->ed_prev; | |
148 | return ed; | |
149 | } | |
150 | ||
151 | /* caller has locked the root hub */ | |
8d1a243b AS |
152 | static int ohci_rh_resume (struct ohci_hcd *ohci) |
153 | __releases(ohci->lock) | |
154 | __acquires(ohci->lock) | |
1da177e4 | 155 | { |
8d1a243b | 156 | struct usb_hcd *hcd = ohci_to_hcd (ohci); |
1da177e4 LT |
157 | u32 temp, enables; |
158 | int status = -EINPROGRESS; | |
8d1a243b | 159 | int autostopped = ohci->autostop; |
8de98402 | 160 | |
8d1a243b | 161 | ohci->autostop = 0; |
1da177e4 LT |
162 | ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); |
163 | ||
164 | if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { | |
f197b2c5 | 165 | /* this can happen after resuming a swsusp snapshot */ |
b7463c71 | 166 | if (ohci->rh_state != OHCI_RH_RUNNING) { |
1da177e4 LT |
167 | ohci_dbg (ohci, "BIOS/SMM active, control %03x\n", |
168 | ohci->hc_control); | |
169 | status = -EBUSY; | |
170 | /* this happens when pmcore resumes HC then root */ | |
171 | } else { | |
172 | ohci_dbg (ohci, "duplicate resume\n"); | |
173 | status = 0; | |
174 | } | |
175 | } else switch (ohci->hc_control & OHCI_CTRL_HCFS) { | |
176 | case OHCI_USB_SUSPEND: | |
177 | ohci->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); | |
178 | ohci->hc_control |= OHCI_USB_RESUME; | |
179 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
180 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
181 | ohci_dbg (ohci, "%s root hub\n", |
182 | autostopped ? "auto-start" : "resume"); | |
1da177e4 LT |
183 | break; |
184 | case OHCI_USB_RESUME: | |
185 | /* HCFS changes sometime after INTR_RD */ | |
1b7be3c0 | 186 | ohci_dbg(ohci, "%swakeup root hub\n", |
583ceada | 187 | autostopped ? "auto-" : ""); |
1da177e4 LT |
188 | break; |
189 | case OHCI_USB_OPER: | |
f197b2c5 DB |
190 | /* this can happen after resuming a swsusp snapshot */ |
191 | ohci_dbg (ohci, "snapshot resume? reinit\n"); | |
192 | status = -EBUSY; | |
1da177e4 LT |
193 | break; |
194 | default: /* RESET, we lost power */ | |
f197b2c5 | 195 | ohci_dbg (ohci, "lost power\n"); |
1da177e4 LT |
196 | status = -EBUSY; |
197 | } | |
1da177e4 | 198 | if (status == -EBUSY) { |
8d1a243b | 199 | if (!autostopped) { |
8d1a243b | 200 | spin_unlock_irq (&ohci->lock); |
8d1a243b | 201 | status = ohci_restart (ohci); |
d576bb9f MH |
202 | |
203 | usb_root_hub_lost_power(hcd->self.root_hub); | |
204 | ||
8d1a243b AS |
205 | spin_lock_irq (&ohci->lock); |
206 | } | |
207 | return status; | |
1da177e4 LT |
208 | } |
209 | if (status != -EINPROGRESS) | |
210 | return status; | |
8d1a243b AS |
211 | if (autostopped) |
212 | goto skip_resume; | |
213 | spin_unlock_irq (&ohci->lock); | |
1da177e4 | 214 | |
1da177e4 | 215 | /* Some controllers (lucent erratum) need extra-long delays */ |
f197b2c5 | 216 | msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); |
1da177e4 LT |
217 | |
218 | temp = ohci_readl (ohci, &ohci->regs->control); | |
219 | temp &= OHCI_CTRL_HCFS; | |
220 | if (temp != OHCI_USB_RESUME) { | |
221 | ohci_err (ohci, "controller won't resume\n"); | |
565402ba | 222 | spin_lock_irq(&ohci->lock); |
1da177e4 LT |
223 | return -EBUSY; |
224 | } | |
225 | ||
226 | /* disable old schedule state, reinit from scratch */ | |
227 | ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); | |
228 | ohci_writel (ohci, 0, &ohci->regs->ed_controlcurrent); | |
229 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); | |
230 | ohci_writel (ohci, 0, &ohci->regs->ed_bulkcurrent); | |
231 | ohci_writel (ohci, 0, &ohci->regs->ed_periodcurrent); | |
232 | ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); | |
233 | ||
234 | /* Sometimes PCI D3 suspend trashes frame timings ... */ | |
235 | periodic_reinit (ohci); | |
236 | ||
7c71c6e6 AS |
237 | /* |
238 | * The following code is executed with ohci->lock held and | |
239 | * irqs disabled if and only if autostopped is true. This | |
240 | * will cause sparse to warn about a "context imbalance". | |
8d1a243b | 241 | */ |
8d1a243b | 242 | skip_resume: |
1da177e4 LT |
243 | /* interrupts might have been disabled */ |
244 | ohci_writel (ohci, OHCI_INTR_INIT, &ohci->regs->intrenable); | |
245 | if (ohci->ed_rm_list) | |
246 | ohci_writel (ohci, OHCI_INTR_SF, &ohci->regs->intrenable); | |
1da177e4 LT |
247 | |
248 | /* Then re-enable operations */ | |
249 | ohci_writel (ohci, OHCI_USB_OPER, &ohci->regs->control); | |
250 | (void) ohci_readl (ohci, &ohci->regs->control); | |
8d1a243b AS |
251 | if (!autostopped) |
252 | msleep (3); | |
1da177e4 | 253 | |
6a9062f3 DB |
254 | temp = ohci->hc_control; |
255 | temp &= OHCI_CTRL_RWC; | |
256 | temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; | |
1da177e4 LT |
257 | ohci->hc_control = temp; |
258 | ohci_writel (ohci, temp, &ohci->regs->control); | |
259 | (void) ohci_readl (ohci, &ohci->regs->control); | |
260 | ||
261 | /* TRSMRCY */ | |
8d1a243b AS |
262 | if (!autostopped) { |
263 | msleep (10); | |
264 | spin_lock_irq (&ohci->lock); | |
265 | } | |
266 | /* now ohci->lock is always held and irqs are always disabled */ | |
1da177e4 | 267 | |
d413984a DB |
268 | /* keep it alive for more than ~5x suspend + resume costs */ |
269 | ohci->next_statechange = jiffies + STATECHANGE_DELAY; | |
1da177e4 LT |
270 | |
271 | /* maybe turn schedules back on */ | |
272 | enables = 0; | |
273 | temp = 0; | |
274 | if (!ohci->ed_rm_list) { | |
275 | if (ohci->ed_controltail) { | |
276 | ohci_writel (ohci, | |
277 | find_head (ohci->ed_controltail)->dma, | |
278 | &ohci->regs->ed_controlhead); | |
279 | enables |= OHCI_CTRL_CLE; | |
280 | temp |= OHCI_CLF; | |
281 | } | |
282 | if (ohci->ed_bulktail) { | |
283 | ohci_writel (ohci, find_head (ohci->ed_bulktail)->dma, | |
284 | &ohci->regs->ed_bulkhead); | |
285 | enables |= OHCI_CTRL_BLE; | |
286 | temp |= OHCI_BLF; | |
287 | } | |
288 | } | |
289 | if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) | |
290 | enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; | |
291 | if (enables) { | |
292 | ohci_dbg (ohci, "restarting schedules ... %08x\n", enables); | |
293 | ohci->hc_control |= enables; | |
294 | ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); | |
295 | if (temp) | |
296 | ohci_writel (ohci, temp, &ohci->regs->cmdstatus); | |
297 | (void) ohci_readl (ohci, &ohci->regs->control); | |
298 | } | |
299 | ||
b7463c71 | 300 | ohci->rh_state = OHCI_RH_RUNNING; |
1da177e4 LT |
301 | return 0; |
302 | } | |
303 | ||
8d1a243b AS |
304 | static int ohci_bus_suspend (struct usb_hcd *hcd) |
305 | { | |
306 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
307 | int rc; | |
308 | ||
309 | spin_lock_irq (&ohci->lock); | |
310 | ||
541c7d43 | 311 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
312 | rc = -ESHUTDOWN; |
313 | else | |
314 | rc = ohci_rh_suspend (ohci, 0); | |
315 | spin_unlock_irq (&ohci->lock); | |
81e38333 | 316 | |
b2685bda | 317 | if (rc == 0) { |
81e38333 | 318 | del_timer_sync(&ohci->io_watchdog); |
b2685bda SY |
319 | ohci->prev_frame_no = IO_WATCHDOG_OFF; |
320 | } | |
8d1a243b AS |
321 | return rc; |
322 | } | |
323 | ||
324 | static int ohci_bus_resume (struct usb_hcd *hcd) | |
325 | { | |
326 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
327 | int rc; | |
328 | ||
329 | if (time_before (jiffies, ohci->next_statechange)) | |
330 | msleep(5); | |
331 | ||
332 | spin_lock_irq (&ohci->lock); | |
333 | ||
541c7d43 | 334 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8d1a243b AS |
335 | rc = -ESHUTDOWN; |
336 | else | |
337 | rc = ohci_rh_resume (ohci); | |
338 | spin_unlock_irq (&ohci->lock); | |
339 | ||
340 | /* poll until we know a device is connected or we autostop */ | |
341 | if (rc == 0) | |
342 | usb_hcd_poll_rh_status(hcd); | |
343 | return rc; | |
344 | } | |
345 | ||
1f9fc882 AS |
346 | /* Carry out polling-, autostop-, and autoresume-related state changes */ |
347 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 348 | int any_connected, int rhsc_status) |
1f9fc882 AS |
349 | { |
350 | int poll_rh = 1; | |
71b7497c | 351 | int rhsc_enable; |
1f9fc882 | 352 | |
ee0b9be8 | 353 | /* Some broken controllers never turn off RHSC in the interrupt |
4a511bc3 AS |
354 | * status register. For their sake we won't re-enable RHSC |
355 | * interrupts if the interrupt bit is already active. | |
356 | */ | |
4a511bc3 AS |
357 | rhsc_enable = ohci_readl(ohci, &ohci->regs->intrenable) & |
358 | OHCI_INTR_RHSC; | |
1f9fc882 | 359 | |
4a511bc3 | 360 | switch (ohci->hc_control & OHCI_CTRL_HCFS) { |
1f9fc882 | 361 | case OHCI_USB_OPER: |
4a511bc3 AS |
362 | /* If no status changes are pending, enable RHSC interrupts. */ |
363 | if (!rhsc_enable && !rhsc_status && !changed) { | |
364 | rhsc_enable = OHCI_INTR_RHSC; | |
365 | ohci_writel(ohci, rhsc_enable, &ohci->regs->intrenable); | |
b5fb454f AS |
366 | } |
367 | ||
368 | /* Keep on polling until we know a device is connected | |
369 | * and RHSC is enabled, or until we autostop. | |
370 | */ | |
1f9fc882 AS |
371 | if (!ohci->autostop) { |
372 | if (any_connected || | |
373 | !device_may_wakeup(&ohci_to_hcd(ohci) | |
374 | ->self.root_hub->dev)) { | |
4a511bc3 | 375 | if (rhsc_enable) |
1f9fc882 AS |
376 | poll_rh = 0; |
377 | } else { | |
378 | ohci->autostop = 1; | |
379 | ohci->next_statechange = jiffies + HZ; | |
380 | } | |
381 | ||
382 | /* if no devices have been attached for one second, autostop */ | |
383 | } else { | |
384 | if (changed || any_connected) { | |
385 | ohci->autostop = 0; | |
386 | ohci->next_statechange = jiffies + | |
387 | STATECHANGE_DELAY; | |
4a511bc3 | 388 | } else if (time_after_eq(jiffies, |
1f9fc882 AS |
389 | ohci->next_statechange) |
390 | && !ohci->ed_rm_list | |
391 | && !(ohci->hc_control & | |
392 | OHCI_SCHED_ENABLES)) { | |
393 | ohci_rh_suspend(ohci, 1); | |
4a511bc3 AS |
394 | if (rhsc_enable) |
395 | poll_rh = 0; | |
1f9fc882 AS |
396 | } |
397 | } | |
398 | break; | |
399 | ||
1f9fc882 AS |
400 | case OHCI_USB_SUSPEND: |
401 | case OHCI_USB_RESUME: | |
4a511bc3 | 402 | /* if there is a port change, autostart or ask to be resumed */ |
1f9fc882 AS |
403 | if (changed) { |
404 | if (ohci->autostop) | |
405 | ohci_rh_resume(ohci); | |
406 | else | |
407 | usb_hcd_resume_root_hub(ohci_to_hcd(ohci)); | |
71b7497c AS |
408 | |
409 | /* If remote wakeup is disabled, stop polling */ | |
410 | } else if (!ohci->autostop && | |
411 | !ohci_to_hcd(ohci)->self.root_hub-> | |
412 | do_remote_wakeup) { | |
413 | poll_rh = 0; | |
414 | ||
1f9fc882 | 415 | } else { |
71b7497c AS |
416 | /* If no status changes are pending, |
417 | * enable RHSC interrupts | |
418 | */ | |
419 | if (!rhsc_enable && !rhsc_status) { | |
4a511bc3 AS |
420 | rhsc_enable = OHCI_INTR_RHSC; |
421 | ohci_writel(ohci, rhsc_enable, | |
b5fb454f | 422 | &ohci->regs->intrenable); |
4a511bc3 | 423 | } |
71b7497c | 424 | /* Keep polling until RHSC is enabled */ |
4a511bc3 AS |
425 | if (rhsc_enable) |
426 | poll_rh = 0; | |
1f9fc882 AS |
427 | } |
428 | break; | |
429 | } | |
430 | return poll_rh; | |
431 | } | |
432 | ||
433 | #else /* CONFIG_PM */ | |
434 | ||
435 | static inline int ohci_rh_resume(struct ohci_hcd *ohci) | |
436 | { | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /* Carry out polling-related state changes. | |
441 | * autostop isn't used when CONFIG_PM is turned off. | |
442 | */ | |
443 | static int ohci_root_hub_state_changes(struct ohci_hcd *ohci, int changed, | |
71b7497c | 444 | int any_connected, int rhsc_status) |
1f9fc882 | 445 | { |
b5fb454f | 446 | /* If RHSC is enabled, don't poll */ |
09ca8adb | 447 | if (ohci_readl(ohci, &ohci->regs->intrenable) & OHCI_INTR_RHSC) |
b5fb454f AS |
448 | return 0; |
449 | ||
71b7497c AS |
450 | /* If status changes are pending, continue polling. |
451 | * Conversely, if no status changes are pending but the RHSC | |
452 | * status bit was set, then RHSC may be broken so continue polling. | |
453 | */ | |
454 | if (changed || rhsc_status) | |
455 | return 1; | |
456 | ||
457 | /* It's safe to re-enable RHSC interrupts */ | |
458 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrenable); | |
459 | return 0; | |
1f9fc882 AS |
460 | } |
461 | ||
8ad7fe16 | 462 | #endif /* CONFIG_PM */ |
1da177e4 LT |
463 | |
464 | /*-------------------------------------------------------------------------*/ | |
465 | ||
466 | /* build "status change" packet (one or two bytes) from HC registers */ | |
467 | ||
42b59eba | 468 | int ohci_hub_status_data(struct usb_hcd *hcd, char *buf) |
1da177e4 LT |
469 | { |
470 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fdd13b36 | 471 | int i, changed = 0, length = 1; |
052ac01a | 472 | int any_connected = 0; |
71b7497c | 473 | int rhsc_status; |
1da177e4 LT |
474 | unsigned long flags; |
475 | ||
476 | spin_lock_irqsave (&ohci->lock, flags); | |
541c7d43 | 477 | if (!HCD_HW_ACCESSIBLE(hcd)) |
6fd75b19 | 478 | goto done; |
1da177e4 | 479 | |
fdd13b36 DB |
480 | /* undocumented erratum seen on at least rev D */ |
481 | if ((ohci->flags & OHCI_QUIRK_AMD756) | |
482 | && (roothub_a (ohci) & RH_A_NDP) > MAX_ROOT_PORTS) { | |
483 | ohci_warn (ohci, "bogus NDP, rereads as NDP=%d\n", | |
1da177e4 LT |
484 | ohci_readl (ohci, &ohci->regs->roothub.a) & RH_A_NDP); |
485 | /* retry later; "should not happen" */ | |
486 | goto done; | |
487 | } | |
488 | ||
489 | /* init status */ | |
490 | if (roothub_status (ohci) & (RH_HS_LPSC | RH_HS_OCIC)) | |
491 | buf [0] = changed = 1; | |
492 | else | |
493 | buf [0] = 0; | |
fdd13b36 | 494 | if (ohci->num_ports > 7) { |
1da177e4 LT |
495 | buf [1] = 0; |
496 | length++; | |
497 | } | |
498 | ||
71b7497c AS |
499 | /* Clear the RHSC status flag before reading the port statuses */ |
500 | ohci_writel(ohci, OHCI_INTR_RHSC, &ohci->regs->intrstatus); | |
501 | rhsc_status = ohci_readl(ohci, &ohci->regs->intrstatus) & | |
502 | OHCI_INTR_RHSC; | |
503 | ||
1da177e4 | 504 | /* look at each port */ |
fdd13b36 | 505 | for (i = 0; i < ohci->num_ports; i++) { |
1da177e4 LT |
506 | u32 status = roothub_portstatus (ohci, i); |
507 | ||
8d1a243b AS |
508 | /* can't autostop if ports are connected */ |
509 | any_connected |= (status & RH_PS_CCS); | |
510 | ||
1da177e4 LT |
511 | if (status & (RH_PS_CSC | RH_PS_PESC | RH_PS_PSSC |
512 | | RH_PS_OCIC | RH_PS_PRSC)) { | |
513 | changed = 1; | |
514 | if (i < 7) | |
515 | buf [0] |= 1 << (i + 1); | |
516 | else | |
517 | buf [1] |= 1 << (i - 7); | |
1da177e4 | 518 | } |
d413984a | 519 | } |
1da177e4 | 520 | |
541c7d43 AS |
521 | if (ohci_root_hub_state_changes(ohci, changed, |
522 | any_connected, rhsc_status)) | |
523 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
524 | else | |
525 | clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); | |
526 | ||
d413984a | 527 | |
1da177e4 LT |
528 | done: |
529 | spin_unlock_irqrestore (&ohci->lock, flags); | |
530 | ||
1da177e4 LT |
531 | return changed ? length : 0; |
532 | } | |
42b59eba | 533 | EXPORT_SYMBOL_GPL(ohci_hub_status_data); |
1da177e4 LT |
534 | |
535 | /*-------------------------------------------------------------------------*/ | |
536 | ||
537 | static void | |
538 | ohci_hub_descriptor ( | |
539 | struct ohci_hcd *ohci, | |
540 | struct usb_hub_descriptor *desc | |
541 | ) { | |
542 | u32 rh = roothub_a (ohci); | |
1da177e4 LT |
543 | u16 temp; |
544 | ||
7a2d2672 | 545 | desc->bDescriptorType = USB_DT_HUB; |
1da177e4 LT |
546 | desc->bPwrOn2PwrGood = (rh & RH_A_POTPGT) >> 24; |
547 | desc->bHubContrCurrent = 0; | |
548 | ||
fdd13b36 DB |
549 | desc->bNbrPorts = ohci->num_ports; |
550 | temp = 1 + (ohci->num_ports / 8); | |
1da177e4 LT |
551 | desc->bDescLength = 7 + 2 * temp; |
552 | ||
db42a4c9 | 553 | temp = HUB_CHAR_COMMON_LPSM | HUB_CHAR_COMMON_OCPM; |
1da177e4 | 554 | if (rh & RH_A_NPS) /* no power switching? */ |
db42a4c9 | 555 | temp |= HUB_CHAR_NO_LPSM; |
dd9048af | 556 | if (rh & RH_A_PSM) /* per-port power switching? */ |
db42a4c9 | 557 | temp |= HUB_CHAR_INDV_PORT_LPSM; |
1da177e4 | 558 | if (rh & RH_A_NOCP) /* no overcurrent reporting? */ |
db42a4c9 | 559 | temp |= HUB_CHAR_NO_OCPM; |
1da177e4 | 560 | else if (rh & RH_A_OCPM) /* per-port overcurrent reporting? */ |
db42a4c9 | 561 | temp |= HUB_CHAR_INDV_PORT_OCPM; |
7c71c6e6 | 562 | desc->wHubCharacteristics = cpu_to_le16(temp); |
1da177e4 | 563 | |
da13051c | 564 | /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ |
1da177e4 | 565 | rh = roothub_b (ohci); |
dbe79bbe JY |
566 | memset(desc->u.hs.DeviceRemovable, 0xff, |
567 | sizeof(desc->u.hs.DeviceRemovable)); | |
568 | desc->u.hs.DeviceRemovable[0] = rh & RH_B_DR; | |
fdd13b36 | 569 | if (ohci->num_ports > 7) { |
dbe79bbe JY |
570 | desc->u.hs.DeviceRemovable[1] = (rh & RH_B_DR) >> 8; |
571 | desc->u.hs.DeviceRemovable[2] = 0xff; | |
1da177e4 | 572 | } else |
dbe79bbe | 573 | desc->u.hs.DeviceRemovable[1] = 0xff; |
1da177e4 LT |
574 | } |
575 | ||
576 | /*-------------------------------------------------------------------------*/ | |
577 | ||
578 | #ifdef CONFIG_USB_OTG | |
579 | ||
580 | static int ohci_start_port_reset (struct usb_hcd *hcd, unsigned port) | |
581 | { | |
582 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
583 | u32 status; | |
584 | ||
585 | if (!port) | |
586 | return -EINVAL; | |
587 | port--; | |
588 | ||
589 | /* start port reset before HNP protocol times out */ | |
590 | status = ohci_readl(ohci, &ohci->regs->roothub.portstatus [port]); | |
591 | if (!(status & RH_PS_CCS)) | |
592 | return -ENODEV; | |
593 | ||
37ebb549 | 594 | /* hub_wq will finish the reset later */ |
1da177e4 LT |
595 | ohci_writel(ohci, RH_PS_PRS, &ohci->regs->roothub.portstatus [port]); |
596 | return 0; | |
597 | } | |
598 | ||
1da177e4 LT |
599 | #else |
600 | ||
601 | #define ohci_start_port_reset NULL | |
602 | ||
603 | #endif | |
604 | ||
605 | /*-------------------------------------------------------------------------*/ | |
606 | ||
607 | ||
608 | /* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, | |
609 | * not necessarily continuous ... to guard against resume signaling. | |
1da177e4 | 610 | */ |
1da177e4 | 611 | #define PORT_RESET_MSEC 50 |
1da177e4 LT |
612 | |
613 | /* this timer value might be vendor-specific ... */ | |
614 | #define PORT_RESET_HW_MSEC 10 | |
615 | ||
616 | /* wrap-aware logic morphed from <linux/jiffies.h> */ | |
617 | #define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0) | |
618 | ||
37ebb549 | 619 | /* called from some task, normally hub_wq */ |
23d10a9e | 620 | static inline int root_port_reset (struct ohci_hcd *ohci, unsigned port) |
1da177e4 LT |
621 | { |
622 | __hc32 __iomem *portstat = &ohci->regs->roothub.portstatus [port]; | |
1b7b61c5 | 623 | u32 temp = 0; |
1da177e4 LT |
624 | u16 now = ohci_readl(ohci, &ohci->regs->fmnumber); |
625 | u16 reset_done = now + PORT_RESET_MSEC; | |
e01e7fe3 | 626 | int limit_1 = DIV_ROUND_UP(PORT_RESET_MSEC, PORT_RESET_HW_MSEC); |
1da177e4 LT |
627 | |
628 | /* build a "continuous enough" reset signal, with up to | |
629 | * 3msec gap between pulses. scheduler HZ==100 must work; | |
630 | * this might need to be deadline-scheduled. | |
631 | */ | |
632 | do { | |
e01e7fe3 DB |
633 | int limit_2; |
634 | ||
1da177e4 | 635 | /* spin until any current reset finishes */ |
e01e7fe3 DB |
636 | limit_2 = PORT_RESET_HW_MSEC * 2; |
637 | while (--limit_2 >= 0) { | |
1da177e4 | 638 | temp = ohci_readl (ohci, portstat); |
23d10a9e TO |
639 | /* handle e.g. CardBus eject */ |
640 | if (temp == ~(u32)0) | |
641 | return -ESHUTDOWN; | |
1da177e4 LT |
642 | if (!(temp & RH_PS_PRS)) |
643 | break; | |
644 | udelay (500); | |
dd9048af | 645 | } |
1da177e4 | 646 | |
e01e7fe3 DB |
647 | /* timeout (a hardware error) has been observed when |
648 | * EHCI sets CF while this driver is resetting a port; | |
649 | * presumably other disconnect paths might do it too. | |
650 | */ | |
651 | if (limit_2 < 0) { | |
652 | ohci_dbg(ohci, | |
653 | "port[%d] reset timeout, stat %08x\n", | |
654 | port, temp); | |
655 | break; | |
656 | } | |
657 | ||
1da177e4 LT |
658 | if (!(temp & RH_PS_CCS)) |
659 | break; | |
660 | if (temp & RH_PS_PRSC) | |
661 | ohci_writel (ohci, RH_PS_PRSC, portstat); | |
662 | ||
663 | /* start the next reset, sleep till it's probably done */ | |
664 | ohci_writel (ohci, RH_PS_PRS, portstat); | |
665 | msleep(PORT_RESET_HW_MSEC); | |
666 | now = ohci_readl(ohci, &ohci->regs->fmnumber); | |
e01e7fe3 DB |
667 | } while (tick_before(now, reset_done) && --limit_1 >= 0); |
668 | ||
669 | /* caller synchronizes using PRSC ... and handles PRS | |
670 | * still being set when this returns. | |
671 | */ | |
23d10a9e TO |
672 | |
673 | return 0; | |
1da177e4 LT |
674 | } |
675 | ||
42b59eba | 676 | int ohci_hub_control( |
1da177e4 LT |
677 | struct usb_hcd *hcd, |
678 | u16 typeReq, | |
679 | u16 wValue, | |
680 | u16 wIndex, | |
681 | char *buf, | |
682 | u16 wLength | |
683 | ) { | |
684 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); | |
fcf7d214 | 685 | int ports = ohci->num_ports; |
1da177e4 LT |
686 | u32 temp; |
687 | int retval = 0; | |
688 | ||
541c7d43 | 689 | if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) |
8de98402 BH |
690 | return -ESHUTDOWN; |
691 | ||
1da177e4 LT |
692 | switch (typeReq) { |
693 | case ClearHubFeature: | |
694 | switch (wValue) { | |
695 | case C_HUB_OVER_CURRENT: | |
696 | ohci_writel (ohci, RH_HS_OCIC, | |
697 | &ohci->regs->roothub.status); | |
1d6903a6 | 698 | break; |
1da177e4 LT |
699 | case C_HUB_LOCAL_POWER: |
700 | break; | |
701 | default: | |
702 | goto error; | |
703 | } | |
704 | break; | |
705 | case ClearPortFeature: | |
706 | if (!wIndex || wIndex > ports) | |
707 | goto error; | |
708 | wIndex--; | |
709 | ||
710 | switch (wValue) { | |
711 | case USB_PORT_FEAT_ENABLE: | |
712 | temp = RH_PS_CCS; | |
713 | break; | |
714 | case USB_PORT_FEAT_C_ENABLE: | |
715 | temp = RH_PS_PESC; | |
716 | break; | |
717 | case USB_PORT_FEAT_SUSPEND: | |
718 | temp = RH_PS_POCI; | |
1da177e4 LT |
719 | break; |
720 | case USB_PORT_FEAT_C_SUSPEND: | |
721 | temp = RH_PS_PSSC; | |
722 | break; | |
723 | case USB_PORT_FEAT_POWER: | |
724 | temp = RH_PS_LSDA; | |
725 | break; | |
726 | case USB_PORT_FEAT_C_CONNECTION: | |
727 | temp = RH_PS_CSC; | |
728 | break; | |
729 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
730 | temp = RH_PS_OCIC; | |
731 | break; | |
732 | case USB_PORT_FEAT_C_RESET: | |
733 | temp = RH_PS_PRSC; | |
734 | break; | |
735 | default: | |
736 | goto error; | |
737 | } | |
738 | ohci_writel (ohci, temp, | |
739 | &ohci->regs->roothub.portstatus [wIndex]); | |
740 | // ohci_readl (ohci, &ohci->regs->roothub.portstatus [wIndex]); | |
741 | break; | |
742 | case GetHubDescriptor: | |
743 | ohci_hub_descriptor (ohci, (struct usb_hub_descriptor *) buf); | |
744 | break; | |
745 | case GetHubStatus: | |
746 | temp = roothub_status (ohci) & ~(RH_HS_CRWE | RH_HS_DRWE); | |
a5abdeaf | 747 | put_unaligned_le32(temp, buf); |
1da177e4 LT |
748 | break; |
749 | case GetPortStatus: | |
750 | if (!wIndex || wIndex > ports) | |
751 | goto error; | |
752 | wIndex--; | |
753 | temp = roothub_portstatus (ohci, wIndex); | |
a5abdeaf | 754 | put_unaligned_le32(temp, buf); |
1da177e4 | 755 | |
00b033bb ON |
756 | if (*(u16*)(buf+2)) /* only if wPortChange is interesting */ |
757 | dbg_port(ohci, "GetStatus", wIndex, temp); | |
1da177e4 LT |
758 | break; |
759 | case SetHubFeature: | |
760 | switch (wValue) { | |
761 | case C_HUB_OVER_CURRENT: | |
762 | // FIXME: this can be cleared, yes? | |
763 | case C_HUB_LOCAL_POWER: | |
764 | break; | |
765 | default: | |
766 | goto error; | |
767 | } | |
768 | break; | |
769 | case SetPortFeature: | |
770 | if (!wIndex || wIndex > ports) | |
771 | goto error; | |
772 | wIndex--; | |
773 | switch (wValue) { | |
774 | case USB_PORT_FEAT_SUSPEND: | |
775 | #ifdef CONFIG_USB_OTG | |
776 | if (hcd->self.otg_port == (wIndex + 1) | |
777 | && hcd->self.b_hnp_enable) | |
e8b24450 | 778 | ohci->start_hnp(ohci); |
1da177e4 LT |
779 | else |
780 | #endif | |
781 | ohci_writel (ohci, RH_PS_PSS, | |
782 | &ohci->regs->roothub.portstatus [wIndex]); | |
783 | break; | |
784 | case USB_PORT_FEAT_POWER: | |
785 | ohci_writel (ohci, RH_PS_PPS, | |
786 | &ohci->regs->roothub.portstatus [wIndex]); | |
787 | break; | |
788 | case USB_PORT_FEAT_RESET: | |
23d10a9e | 789 | retval = root_port_reset (ohci, wIndex); |
1da177e4 LT |
790 | break; |
791 | default: | |
792 | goto error; | |
793 | } | |
794 | break; | |
795 | ||
796 | default: | |
797 | error: | |
798 | /* "protocol stall" on error */ | |
799 | retval = -EPIPE; | |
800 | } | |
801 | return retval; | |
802 | } | |
42b59eba | 803 | EXPORT_SYMBOL_GPL(ohci_hub_control); |