1 | // SPDX-License-Identifier: GPL-1.0+ |
2 | /* |
3 | * OHCI HCD (Host Controller Driver) for USB. |
4 | * |
5 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
6 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
7 | * |
8 | * This file is licenced under the GPL. |
9 | */ |
10 | |
11 | /*-------------------------------------------------------------------------*/ |
12 | |
13 | #define edstring(ed_type) ({ char *temp; \ |
14 | switch (ed_type) { \ |
15 | case PIPE_CONTROL: temp = "ctrl"; break; \ |
16 | case PIPE_BULK: temp = "bulk"; break; \ |
17 | case PIPE_INTERRUPT: temp = "intr"; break; \ |
18 | default: temp = "isoc"; break; \ |
19 | } temp;}) |
20 | #define pipestring(pipe) edstring(usb_pipetype(pipe)) |
21 | |
22 | |
23 | #define ohci_dbg_sw(ohci, next, size, format, arg...) \ |
24 | do { \ |
25 | if (next != NULL) { \ |
26 | unsigned s_len; \ |
27 | s_len = scnprintf (*next, *size, format, ## arg ); \ |
28 | *size -= s_len; *next += s_len; \ |
29 | } else \ |
30 | ohci_dbg(ohci,format, ## arg ); \ |
31 | } while (0); |
32 | |
33 | /* Version for use where "next" is the address of a local variable */ |
34 | #define ohci_dbg_nosw(ohci, next, size, format, arg...) \ |
35 | do { \ |
36 | unsigned s_len; \ |
37 | s_len = scnprintf(*next, *size, format, ## arg); \ |
38 | *size -= s_len; *next += s_len; \ |
39 | } while (0); |
40 | |
41 | |
42 | static void ohci_dump_intr_mask ( |
43 | struct ohci_hcd *ohci, |
44 | char *label, |
45 | u32 mask, |
46 | char **next, |
47 | unsigned *size) |
48 | { |
49 | ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n" , |
50 | label, |
51 | mask, |
52 | (mask & OHCI_INTR_MIE) ? " MIE" : "" , |
53 | (mask & OHCI_INTR_OC) ? " OC" : "" , |
54 | (mask & OHCI_INTR_RHSC) ? " RHSC" : "" , |
55 | (mask & OHCI_INTR_FNO) ? " FNO" : "" , |
56 | (mask & OHCI_INTR_UE) ? " UE" : "" , |
57 | (mask & OHCI_INTR_RD) ? " RD" : "" , |
58 | (mask & OHCI_INTR_SF) ? " SF" : "" , |
59 | (mask & OHCI_INTR_WDH) ? " WDH" : "" , |
60 | (mask & OHCI_INTR_SO) ? " SO" : "" |
61 | ); |
62 | } |
63 | |
64 | static void maybe_print_eds ( |
65 | struct ohci_hcd *ohci, |
66 | char *label, |
67 | u32 value, |
68 | char **next, |
69 | unsigned *size) |
70 | { |
71 | if (value) |
72 | ohci_dbg_sw (ohci, next, size, "%s %08x\n" , label, value); |
73 | } |
74 | |
75 | static char *hcfs2string (int state) |
76 | { |
77 | switch (state) { |
78 | case OHCI_USB_RESET: return "reset" ; |
79 | case OHCI_USB_RESUME: return "resume" ; |
80 | case OHCI_USB_OPER: return "operational" ; |
81 | case OHCI_USB_SUSPEND: return "suspend" ; |
82 | } |
83 | return "?" ; |
84 | } |
85 | |
86 | static const char *rh_state_string(struct ohci_hcd *ohci) |
87 | { |
88 | switch (ohci->rh_state) { |
89 | case OHCI_RH_HALTED: |
90 | return "halted" ; |
91 | case OHCI_RH_SUSPENDED: |
92 | return "suspended" ; |
93 | case OHCI_RH_RUNNING: |
94 | return "running" ; |
95 | } |
96 | return "?" ; |
97 | } |
98 | |
99 | // dump control and status registers |
100 | static void |
101 | ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size) |
102 | { |
103 | struct ohci_regs __iomem *regs = controller->regs; |
104 | u32 temp; |
105 | |
106 | temp = ohci_readl (controller, ®s->revision) & 0xff; |
107 | ohci_dbg_sw (controller, next, size, |
108 | "OHCI %d.%d, %s legacy support registers, rh state %s\n" , |
109 | 0x03 & (temp >> 4), (temp & 0x0f), |
110 | (temp & 0x0100) ? "with" : "NO" , |
111 | rh_state_string(controller)); |
112 | |
113 | temp = ohci_readl (controller, ®s->control); |
114 | ohci_dbg_sw (controller, next, size, |
115 | "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n" , |
116 | temp, |
117 | (temp & OHCI_CTRL_RWE) ? " RWE" : "" , |
118 | (temp & OHCI_CTRL_RWC) ? " RWC" : "" , |
119 | (temp & OHCI_CTRL_IR) ? " IR" : "" , |
120 | hcfs2string (temp & OHCI_CTRL_HCFS), |
121 | (temp & OHCI_CTRL_BLE) ? " BLE" : "" , |
122 | (temp & OHCI_CTRL_CLE) ? " CLE" : "" , |
123 | (temp & OHCI_CTRL_IE) ? " IE" : "" , |
124 | (temp & OHCI_CTRL_PLE) ? " PLE" : "" , |
125 | temp & OHCI_CTRL_CBSR |
126 | ); |
127 | |
128 | temp = ohci_readl (controller, ®s->cmdstatus); |
129 | ohci_dbg_sw (controller, next, size, |
130 | "cmdstatus 0x%05x SOC=%d%s%s%s%s\n" , temp, |
131 | (temp & OHCI_SOC) >> 16, |
132 | (temp & OHCI_OCR) ? " OCR" : "" , |
133 | (temp & OHCI_BLF) ? " BLF" : "" , |
134 | (temp & OHCI_CLF) ? " CLF" : "" , |
135 | (temp & OHCI_HCR) ? " HCR" : "" |
136 | ); |
137 | |
138 | ohci_dump_intr_mask (controller, "intrstatus" , |
139 | ohci_readl (controller, ®s->intrstatus), |
140 | next, size); |
141 | ohci_dump_intr_mask (controller, "intrenable" , |
142 | ohci_readl (controller, ®s->intrenable), |
143 | next, size); |
144 | // intrdisable always same as intrenable |
145 | |
146 | maybe_print_eds (controller, "ed_periodcurrent" , |
147 | ohci_readl (controller, ®s->ed_periodcurrent), |
148 | next, size); |
149 | |
150 | maybe_print_eds (controller, "ed_controlhead" , |
151 | ohci_readl (controller, ®s->ed_controlhead), |
152 | next, size); |
153 | maybe_print_eds (controller, "ed_controlcurrent" , |
154 | ohci_readl (controller, ®s->ed_controlcurrent), |
155 | next, size); |
156 | |
157 | maybe_print_eds (controller, "ed_bulkhead" , |
158 | ohci_readl (controller, ®s->ed_bulkhead), |
159 | next, size); |
160 | maybe_print_eds (controller, "ed_bulkcurrent" , |
161 | ohci_readl (controller, ®s->ed_bulkcurrent), |
162 | next, size); |
163 | |
164 | maybe_print_eds (controller, "donehead" , |
165 | ohci_readl (controller, ®s->donehead), next, size); |
166 | } |
167 | |
168 | #define dbg_port_sw(hc,num,value,next,size) \ |
169 | ohci_dbg_sw (hc, next, size, \ |
170 | "roothub.portstatus [%d] " \ |
171 | "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ |
172 | num, temp, \ |
173 | (temp & RH_PS_PRSC) ? " PRSC" : "", \ |
174 | (temp & RH_PS_OCIC) ? " OCIC" : "", \ |
175 | (temp & RH_PS_PSSC) ? " PSSC" : "", \ |
176 | (temp & RH_PS_PESC) ? " PESC" : "", \ |
177 | (temp & RH_PS_CSC) ? " CSC" : "", \ |
178 | \ |
179 | (temp & RH_PS_LSDA) ? " LSDA" : "", \ |
180 | (temp & RH_PS_PPS) ? " PPS" : "", \ |
181 | (temp & RH_PS_PRS) ? " PRS" : "", \ |
182 | (temp & RH_PS_POCI) ? " POCI" : "", \ |
183 | (temp & RH_PS_PSS) ? " PSS" : "", \ |
184 | \ |
185 | (temp & RH_PS_PES) ? " PES" : "", \ |
186 | (temp & RH_PS_CCS) ? " CCS" : "" \ |
187 | ); |
188 | |
189 | |
190 | static void |
191 | ohci_dump_roothub ( |
192 | struct ohci_hcd *controller, |
193 | int verbose, |
194 | char **next, |
195 | unsigned *size) |
196 | { |
197 | u32 temp, i; |
198 | |
199 | temp = roothub_a (controller); |
200 | if (temp == ~(u32)0) |
201 | return; |
202 | |
203 | if (verbose) { |
204 | ohci_dbg_sw (controller, next, size, |
205 | "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n" , temp, |
206 | ((temp & RH_A_POTPGT) >> 24) & 0xff, |
207 | (temp & RH_A_NOCP) ? " NOCP" : "" , |
208 | (temp & RH_A_OCPM) ? " OCPM" : "" , |
209 | (temp & RH_A_DT) ? " DT" : "" , |
210 | (temp & RH_A_NPS) ? " NPS" : "" , |
211 | (temp & RH_A_PSM) ? " PSM" : "" , |
212 | (temp & RH_A_NDP), controller->num_ports |
213 | ); |
214 | temp = roothub_b (controller); |
215 | ohci_dbg_sw (controller, next, size, |
216 | "roothub.b %08x PPCM=%04x DR=%04x\n" , |
217 | temp, |
218 | (temp & RH_B_PPCM) >> 16, |
219 | (temp & RH_B_DR) |
220 | ); |
221 | temp = roothub_status (controller); |
222 | ohci_dbg_sw (controller, next, size, |
223 | "roothub.status %08x%s%s%s%s%s%s\n" , |
224 | temp, |
225 | (temp & RH_HS_CRWE) ? " CRWE" : "" , |
226 | (temp & RH_HS_OCIC) ? " OCIC" : "" , |
227 | (temp & RH_HS_LPSC) ? " LPSC" : "" , |
228 | (temp & RH_HS_DRWE) ? " DRWE" : "" , |
229 | (temp & RH_HS_OCI) ? " OCI" : "" , |
230 | (temp & RH_HS_LPS) ? " LPS" : "" |
231 | ); |
232 | } |
233 | |
234 | for (i = 0; i < controller->num_ports; i++) { |
235 | temp = roothub_portstatus (controller, i); |
236 | dbg_port_sw (controller, i, temp, next, size); |
237 | } |
238 | } |
239 | |
240 | static void ohci_dump(struct ohci_hcd *controller) |
241 | { |
242 | ohci_dbg (controller, "OHCI controller state\n" ); |
243 | |
244 | // dumps some of the state we know about |
245 | ohci_dump_status (controller, NULL, NULL); |
246 | if (controller->hcca) |
247 | ohci_dbg (controller, |
248 | "hcca frame #%04x\n" , ohci_frame_no(controller)); |
249 | ohci_dump_roothub (controller, 1, NULL, NULL); |
250 | } |
251 | |
252 | static const char data0 [] = "DATA0" ; |
253 | static const char data1 [] = "DATA1" ; |
254 | |
255 | static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label, |
256 | const struct td *td) |
257 | { |
258 | u32 tmp = hc32_to_cpup (ohci, &td->hwINFO); |
259 | |
260 | ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n" , |
261 | label, td, |
262 | (tmp & TD_DONE) ? " (DONE)" : "" , |
263 | td->urb, td->index, |
264 | hc32_to_cpup (ohci, &td->hwNextTD)); |
265 | if ((tmp & TD_ISO) == 0) { |
266 | const char *toggle, *pid; |
267 | u32 cbp, be; |
268 | |
269 | switch (tmp & TD_T) { |
270 | case TD_T_DATA0: toggle = data0; break; |
271 | case TD_T_DATA1: toggle = data1; break; |
272 | case TD_T_TOGGLE: toggle = "(CARRY)" ; break; |
273 | default: toggle = "(?)" ; break; |
274 | } |
275 | switch (tmp & TD_DP) { |
276 | case TD_DP_SETUP: pid = "SETUP" ; break; |
277 | case TD_DP_IN: pid = "IN" ; break; |
278 | case TD_DP_OUT: pid = "OUT" ; break; |
279 | default: pid = "(bad pid)" ; break; |
280 | } |
281 | ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n" , tmp, |
282 | TD_CC_GET(tmp), /* EC, */ toggle, |
283 | (tmp & TD_DI) >> 21, pid, |
284 | (tmp & TD_R) ? "R" : "" ); |
285 | cbp = hc32_to_cpup (ohci, &td->hwCBP); |
286 | be = hc32_to_cpup (ohci, &td->hwBE); |
287 | ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n" , cbp, be, |
288 | cbp ? (be + 1 - cbp) : 0); |
289 | } else { |
290 | unsigned i; |
291 | ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n" , tmp, |
292 | TD_CC_GET(tmp), |
293 | (tmp >> 24) & 0x07, |
294 | (tmp & TD_DI) >> 21, |
295 | tmp & 0x0000ffff); |
296 | ohci_dbg (ohci, " bp0 %08x be %08x\n" , |
297 | hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff, |
298 | hc32_to_cpup (ohci, &td->hwBE)); |
299 | for (i = 0; i < MAXPSW; i++) { |
300 | u16 psw = ohci_hwPSW (ohci, td, i); |
301 | int cc = (psw >> 12) & 0x0f; |
302 | ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n" , i, |
303 | psw, cc, |
304 | (cc >= 0x0e) ? "OFFSET" : "SIZE" , |
305 | psw & 0x0fff); |
306 | } |
307 | } |
308 | } |
309 | |
310 | /* caller MUST own hcd spinlock if verbose is set! */ |
311 | static void __maybe_unused |
312 | ohci_dump_ed (const struct ohci_hcd *ohci, const char *label, |
313 | const struct ed *ed, int verbose) |
314 | { |
315 | u32 tmp = hc32_to_cpu (ohci, ed->hwINFO); |
316 | char *type = "" ; |
317 | |
318 | ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n" , |
319 | label, |
320 | ed, ed->state, edstring (ed->type), |
321 | hc32_to_cpup (ohci, &ed->hwNextED)); |
322 | switch (tmp & (ED_IN|ED_OUT)) { |
323 | case ED_OUT: type = "-OUT" ; break; |
324 | case ED_IN: type = "-IN" ; break; |
325 | /* else from TDs ... control */ |
326 | } |
327 | ohci_dbg (ohci, |
328 | " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n" , tmp, |
329 | 0x03ff & (tmp >> 16), |
330 | (tmp & ED_DEQUEUE) ? " DQ" : "" , |
331 | (tmp & ED_ISO) ? " ISO" : "" , |
332 | (tmp & ED_SKIP) ? " SKIP" : "" , |
333 | (tmp & ED_LOWSPEED) ? " LOW" : "" , |
334 | 0x000f & (tmp >> 7), |
335 | type, |
336 | 0x007f & tmp); |
337 | tmp = hc32_to_cpup (ohci, &ed->hwHeadP); |
338 | ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n" , |
339 | tmp, |
340 | (tmp & ED_C) ? data1 : data0, |
341 | (tmp & ED_H) ? " HALT" : "" , |
342 | hc32_to_cpup (ohci, &ed->hwTailP), |
343 | verbose ? "" : " (not listing)" ); |
344 | if (verbose) { |
345 | struct list_head *tmp; |
346 | |
347 | /* use ed->td_list because HC concurrently modifies |
348 | * hwNextTD as it accumulates ed_donelist. |
349 | */ |
350 | list_for_each (tmp, &ed->td_list) { |
351 | struct td *td; |
352 | td = list_entry (tmp, struct td, td_list); |
353 | ohci_dump_td (ohci, label: " ->" , td); |
354 | } |
355 | } |
356 | } |
357 | |
358 | /*-------------------------------------------------------------------------*/ |
359 | |
360 | static int debug_async_open(struct inode *, struct file *); |
361 | static int debug_periodic_open(struct inode *, struct file *); |
362 | static int debug_registers_open(struct inode *, struct file *); |
363 | static int debug_async_open(struct inode *, struct file *); |
364 | static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); |
365 | static int debug_close(struct inode *, struct file *); |
366 | |
367 | static const struct file_operations debug_async_fops = { |
368 | .owner = THIS_MODULE, |
369 | .open = debug_async_open, |
370 | .read = debug_output, |
371 | .release = debug_close, |
372 | .llseek = default_llseek, |
373 | }; |
374 | static const struct file_operations debug_periodic_fops = { |
375 | .owner = THIS_MODULE, |
376 | .open = debug_periodic_open, |
377 | .read = debug_output, |
378 | .release = debug_close, |
379 | .llseek = default_llseek, |
380 | }; |
381 | static const struct file_operations debug_registers_fops = { |
382 | .owner = THIS_MODULE, |
383 | .open = debug_registers_open, |
384 | .read = debug_output, |
385 | .release = debug_close, |
386 | .llseek = default_llseek, |
387 | }; |
388 | |
389 | static struct dentry *ohci_debug_root; |
390 | |
391 | struct debug_buffer { |
392 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ |
393 | struct ohci_hcd *ohci; |
394 | struct mutex mutex; /* protect filling of buffer */ |
395 | size_t count; /* number of characters filled into buffer */ |
396 | char *page; |
397 | }; |
398 | |
399 | static ssize_t |
400 | show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed) |
401 | { |
402 | unsigned temp, size = count; |
403 | |
404 | if (!ed) |
405 | return 0; |
406 | |
407 | /* print first --> last */ |
408 | while (ed->ed_prev) |
409 | ed = ed->ed_prev; |
410 | |
411 | /* dump a snapshot of the bulk or control schedule */ |
412 | while (ed) { |
413 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); |
414 | u32 headp = hc32_to_cpu (ohci, ed->hwHeadP); |
415 | struct list_head *entry; |
416 | struct td *td; |
417 | |
418 | temp = scnprintf (buf, size, |
419 | "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s" , |
420 | ed, |
421 | (info & ED_LOWSPEED) ? 'l' : 'f', |
422 | info & 0x7f, |
423 | (info >> 7) & 0xf, |
424 | (info & ED_IN) ? "in" : "out" , |
425 | 0x03ff & (info >> 16), |
426 | info, |
427 | (info & ED_SKIP) ? " s" : "" , |
428 | (headp & ED_H) ? " H" : "" , |
429 | (headp & ED_C) ? data1 : data0); |
430 | size -= temp; |
431 | buf += temp; |
432 | |
433 | list_for_each (entry, &ed->td_list) { |
434 | u32 cbp, be; |
435 | |
436 | td = list_entry (entry, struct td, td_list); |
437 | info = hc32_to_cpup (ohci, &td->hwINFO); |
438 | cbp = hc32_to_cpup (ohci, &td->hwCBP); |
439 | be = hc32_to_cpup (ohci, &td->hwBE); |
440 | temp = scnprintf (buf, size, |
441 | "\n\ttd %p %s %d cc=%x urb %p (%08x)" , |
442 | td, |
443 | ({ char *pid; |
444 | switch (info & TD_DP) { |
445 | case TD_DP_SETUP: pid = "setup" ; break; |
446 | case TD_DP_IN: pid = "in" ; break; |
447 | case TD_DP_OUT: pid = "out" ; break; |
448 | default: pid = "(?)" ; break; |
449 | } pid;}), |
450 | cbp ? (be + 1 - cbp) : 0, |
451 | TD_CC_GET (info), td->urb, info); |
452 | size -= temp; |
453 | buf += temp; |
454 | } |
455 | |
456 | temp = scnprintf (buf, size, "\n" ); |
457 | size -= temp; |
458 | buf += temp; |
459 | |
460 | ed = ed->ed_next; |
461 | } |
462 | return count - size; |
463 | } |
464 | |
465 | static ssize_t fill_async_buffer(struct debug_buffer *buf) |
466 | { |
467 | struct ohci_hcd *ohci; |
468 | size_t temp, size; |
469 | unsigned long flags; |
470 | |
471 | ohci = buf->ohci; |
472 | size = PAGE_SIZE; |
473 | |
474 | /* display control and bulk lists together, for simplicity */ |
475 | spin_lock_irqsave (&ohci->lock, flags); |
476 | temp = show_list(ohci, buf->page, size, ohci->ed_controltail); |
477 | temp += show_list(ohci, buf->page + temp, size - temp, |
478 | ohci->ed_bulktail); |
479 | spin_unlock_irqrestore (&ohci->lock, flags); |
480 | |
481 | return temp; |
482 | } |
483 | |
484 | #define DBG_SCHED_LIMIT 64 |
485 | |
486 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
487 | { |
488 | struct ohci_hcd *ohci; |
489 | struct ed **seen, *ed; |
490 | unsigned long flags; |
491 | unsigned temp, size, seen_count; |
492 | char *next; |
493 | unsigned i; |
494 | |
495 | seen = kmalloc_array(DBG_SCHED_LIMIT, sizeof(*seen), GFP_ATOMIC); |
496 | if (!seen) |
497 | return 0; |
498 | seen_count = 0; |
499 | |
500 | ohci = buf->ohci; |
501 | next = buf->page; |
502 | size = PAGE_SIZE; |
503 | |
504 | temp = scnprintf (next, size, "size = %d\n" , NUM_INTS); |
505 | size -= temp; |
506 | next += temp; |
507 | |
508 | /* dump a snapshot of the periodic schedule (and load) */ |
509 | spin_lock_irqsave (&ohci->lock, flags); |
510 | for (i = 0; i < NUM_INTS; i++) { |
511 | ed = ohci->periodic[i]; |
512 | if (!ed) |
513 | continue; |
514 | |
515 | temp = scnprintf (next, size, "%2d [%3d]:" , i, ohci->load [i]); |
516 | size -= temp; |
517 | next += temp; |
518 | |
519 | do { |
520 | temp = scnprintf (next, size, " ed%d/%p" , |
521 | ed->interval, ed); |
522 | size -= temp; |
523 | next += temp; |
524 | for (temp = 0; temp < seen_count; temp++) { |
525 | if (seen [temp] == ed) |
526 | break; |
527 | } |
528 | |
529 | /* show more info the first time around */ |
530 | if (temp == seen_count) { |
531 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); |
532 | struct list_head *entry; |
533 | unsigned qlen = 0; |
534 | |
535 | /* qlen measured here in TDs, not urbs */ |
536 | list_for_each (entry, &ed->td_list) |
537 | qlen++; |
538 | |
539 | temp = scnprintf (next, size, |
540 | " (%cs dev%d ep%d%s-%s qlen %u" |
541 | " max %d %08x%s%s)" , |
542 | (info & ED_LOWSPEED) ? 'l' : 'f', |
543 | info & 0x7f, |
544 | (info >> 7) & 0xf, |
545 | (info & ED_IN) ? "in" : "out" , |
546 | (info & ED_ISO) ? "iso" : "int" , |
547 | qlen, |
548 | 0x03ff & (info >> 16), |
549 | info, |
550 | (info & ED_SKIP) ? " K" : "" , |
551 | (ed->hwHeadP & |
552 | cpu_to_hc32(ohci, ED_H)) ? |
553 | " H" : "" ); |
554 | size -= temp; |
555 | next += temp; |
556 | |
557 | if (seen_count < DBG_SCHED_LIMIT) |
558 | seen [seen_count++] = ed; |
559 | |
560 | ed = ed->ed_next; |
561 | |
562 | } else { |
563 | /* we've seen it and what's after */ |
564 | temp = 0; |
565 | ed = NULL; |
566 | } |
567 | |
568 | } while (ed); |
569 | |
570 | temp = scnprintf (next, size, "\n" ); |
571 | size -= temp; |
572 | next += temp; |
573 | } |
574 | spin_unlock_irqrestore (&ohci->lock, flags); |
575 | kfree (seen); |
576 | |
577 | return PAGE_SIZE - size; |
578 | } |
579 | #undef DBG_SCHED_LIMIT |
580 | |
581 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
582 | { |
583 | struct usb_hcd *hcd; |
584 | struct ohci_hcd *ohci; |
585 | struct ohci_regs __iomem *regs; |
586 | unsigned long flags; |
587 | unsigned temp, size; |
588 | char *next; |
589 | u32 rdata; |
590 | |
591 | ohci = buf->ohci; |
592 | hcd = ohci_to_hcd(ohci); |
593 | regs = ohci->regs; |
594 | next = buf->page; |
595 | size = PAGE_SIZE; |
596 | |
597 | spin_lock_irqsave (&ohci->lock, flags); |
598 | |
599 | /* dump driver info, then registers in spec order */ |
600 | |
601 | ohci_dbg_nosw(ohci, &next, &size, |
602 | "bus %s, device %s\n" |
603 | "%s\n" |
604 | "%s\n" , |
605 | hcd->self.controller->bus->name, |
606 | dev_name(hcd->self.controller), |
607 | hcd->product_desc, |
608 | hcd_name); |
609 | |
610 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
611 | size -= scnprintf (next, size, |
612 | "SUSPENDED (no register access)\n" ); |
613 | goto done; |
614 | } |
615 | |
616 | ohci_dump_status(controller: ohci, next: &next, size: &size); |
617 | |
618 | /* hcca */ |
619 | if (ohci->hcca) |
620 | ohci_dbg_nosw(ohci, &next, &size, |
621 | "hcca frame 0x%04x\n" , ohci_frame_no(ohci)); |
622 | |
623 | /* other registers mostly affect frame timings */ |
624 | rdata = ohci_readl (ohci, ®s->fminterval); |
625 | temp = scnprintf (next, size, |
626 | "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n" , |
627 | rdata, (rdata >> 31) ? "FIT " : "" , |
628 | (rdata >> 16) & 0xefff, rdata & 0xffff); |
629 | size -= temp; |
630 | next += temp; |
631 | |
632 | rdata = ohci_readl (ohci, ®s->fmremaining); |
633 | temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n" , |
634 | rdata, (rdata >> 31) ? "FRT " : "" , |
635 | rdata & 0x3fff); |
636 | size -= temp; |
637 | next += temp; |
638 | |
639 | rdata = ohci_readl (ohci, ®s->periodicstart); |
640 | temp = scnprintf (next, size, "periodicstart 0x%04x\n" , |
641 | rdata & 0x3fff); |
642 | size -= temp; |
643 | next += temp; |
644 | |
645 | rdata = ohci_readl (ohci, ®s->lsthresh); |
646 | temp = scnprintf (next, size, "lsthresh 0x%04x\n" , |
647 | rdata & 0x3fff); |
648 | size -= temp; |
649 | next += temp; |
650 | |
651 | temp = scnprintf (next, size, "hub poll timer %s\n" , |
652 | HCD_POLL_RH(ohci_to_hcd(ohci)) ? "ON" : "off" ); |
653 | size -= temp; |
654 | next += temp; |
655 | |
656 | /* roothub */ |
657 | ohci_dump_roothub (controller: ohci, verbose: 1, next: &next, size: &size); |
658 | |
659 | done: |
660 | spin_unlock_irqrestore (&ohci->lock, flags); |
661 | |
662 | return PAGE_SIZE - size; |
663 | } |
664 | |
665 | static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci, |
666 | ssize_t (*fill_func)(struct debug_buffer *)) |
667 | { |
668 | struct debug_buffer *buf; |
669 | |
670 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); |
671 | |
672 | if (buf) { |
673 | buf->ohci = ohci; |
674 | buf->fill_func = fill_func; |
675 | mutex_init(&buf->mutex); |
676 | } |
677 | |
678 | return buf; |
679 | } |
680 | |
681 | static int fill_buffer(struct debug_buffer *buf) |
682 | { |
683 | int ret; |
684 | |
685 | if (!buf->page) |
686 | buf->page = (char *)get_zeroed_page(GFP_KERNEL); |
687 | |
688 | if (!buf->page) { |
689 | ret = -ENOMEM; |
690 | goto out; |
691 | } |
692 | |
693 | ret = buf->fill_func(buf); |
694 | |
695 | if (ret >= 0) { |
696 | buf->count = ret; |
697 | ret = 0; |
698 | } |
699 | |
700 | out: |
701 | return ret; |
702 | } |
703 | |
704 | static ssize_t debug_output(struct file *file, char __user *user_buf, |
705 | size_t len, loff_t *offset) |
706 | { |
707 | struct debug_buffer *buf = file->private_data; |
708 | int ret; |
709 | |
710 | mutex_lock(&buf->mutex); |
711 | if (buf->count == 0) { |
712 | ret = fill_buffer(buf); |
713 | if (ret != 0) { |
714 | mutex_unlock(&buf->mutex); |
715 | goto out; |
716 | } |
717 | } |
718 | mutex_unlock(&buf->mutex); |
719 | |
720 | ret = simple_read_from_buffer(user_buf, len, offset, |
721 | buf->page, buf->count); |
722 | |
723 | out: |
724 | return ret; |
725 | |
726 | } |
727 | |
728 | static int debug_close(struct inode *inode, struct file *file) |
729 | { |
730 | struct debug_buffer *buf = file->private_data; |
731 | |
732 | if (buf) { |
733 | if (buf->page) |
734 | free_page((unsigned long)buf->page); |
735 | kfree(buf); |
736 | } |
737 | |
738 | return 0; |
739 | } |
740 | static int debug_async_open(struct inode *inode, struct file *file) |
741 | { |
742 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); |
743 | |
744 | return file->private_data ? 0 : -ENOMEM; |
745 | } |
746 | |
747 | static int debug_periodic_open(struct inode *inode, struct file *file) |
748 | { |
749 | file->private_data = alloc_buffer(inode->i_private, |
750 | fill_periodic_buffer); |
751 | |
752 | return file->private_data ? 0 : -ENOMEM; |
753 | } |
754 | |
755 | static int debug_registers_open(struct inode *inode, struct file *file) |
756 | { |
757 | file->private_data = alloc_buffer(inode->i_private, |
758 | fill_registers_buffer); |
759 | |
760 | return file->private_data ? 0 : -ENOMEM; |
761 | } |
762 | static inline void create_debug_files (struct ohci_hcd *ohci) |
763 | { |
764 | struct usb_bus *bus = &ohci_to_hcd(ohci)->self; |
765 | struct dentry *root; |
766 | |
767 | root = debugfs_create_dir(bus->bus_name, ohci_debug_root); |
768 | ohci->debug_dir = root; |
769 | |
770 | debugfs_create_file("async" , S_IRUGO, root, ohci, &debug_async_fops); |
771 | debugfs_create_file("periodic" , S_IRUGO, root, ohci, |
772 | &debug_periodic_fops); |
773 | debugfs_create_file("registers" , S_IRUGO, root, ohci, |
774 | &debug_registers_fops); |
775 | |
776 | ohci_dbg (ohci, "created debug files\n" ); |
777 | } |
778 | |
779 | static inline void remove_debug_files (struct ohci_hcd *ohci) |
780 | { |
781 | debugfs_remove_recursive(ohci->debug_dir); |
782 | } |
783 | |
784 | /*-------------------------------------------------------------------------*/ |
785 | |
786 | |