Line data Source code
1 : /*
2 : * OHCI HCD (Host Controller Driver) for USB.
3 : *
4 : * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 : * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
6 : *
7 : * This file is licenced under the GPL.
8 : */
9 :
10 : /*-------------------------------------------------------------------------*/
11 :
12 : #ifdef DEBUG
13 :
14 : #define edstring(ed_type) ({ char *temp; \
15 : switch (ed_type) { \
16 : case PIPE_CONTROL: temp = "ctrl"; break; \
17 : case PIPE_BULK: temp = "bulk"; break; \
18 : case PIPE_INTERRUPT: temp = "intr"; break; \
19 : default: temp = "isoc"; break; \
20 : }; temp;})
21 : #define pipestring(pipe) edstring(usb_pipetype(pipe))
22 :
23 : /* debug| print the main components of an URB
24 : * small: 0) header + data packets 1) just header
25 : */
26 : static void __maybe_unused
27 : urb_print(struct urb * urb, char * str, int small, int status)
28 : {
29 : unsigned int pipe= urb->pipe;
30 :
31 : if (!urb->dev || !urb->dev->bus) {
32 : dbg("%s URB: no dev", str);
33 : return;
34 : }
35 :
36 : #ifndef OHCI_VERBOSE_DEBUG
37 : if (status != 0)
38 : #endif
39 : dbg("%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d stat=%d",
40 : str,
41 : urb,
42 : usb_pipedevice (pipe),
43 : usb_pipeendpoint (pipe),
44 : usb_pipeout (pipe)? "out" : "in",
45 : pipestring (pipe),
46 : urb->transfer_flags,
47 : urb->actual_length,
48 : urb->transfer_buffer_length,
49 : status);
50 :
51 : #ifdef OHCI_VERBOSE_DEBUG
52 : if (!small) {
53 : int i, len;
54 :
55 : if (usb_pipecontrol (pipe)) {
56 : printk (KERN_DEBUG __FILE__ ": setup(8):");
57 : for (i = 0; i < 8 ; i++)
58 : printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
59 : printk ("\n");
60 : }
61 : if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
62 : printk (KERN_DEBUG __FILE__ ": data(%d/%d):",
63 : urb->actual_length,
64 : urb->transfer_buffer_length);
65 : len = usb_pipeout (pipe)?
66 : urb->transfer_buffer_length: urb->actual_length;
67 : for (i = 0; i < 16 && i < len; i++)
68 : printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
69 : printk ("%s stat:%d\n", i < len? "...": "", status);
70 : }
71 : }
72 : #endif
73 : }
74 :
75 : #define ohci_dbg_sw(ohci, next, size, format, arg...) \
76 : do { \
77 : if (next != NULL) { \
78 : unsigned s_len; \
79 : s_len = scnprintf (*next, *size, format, ## arg ); \
80 : *size -= s_len; *next += s_len; \
81 : } else \
82 : ohci_dbg(ohci,format, ## arg ); \
83 : } while (0);
84 :
85 :
86 : static void ohci_dump_intr_mask (
87 : struct ohci_hcd *ohci,
88 : char *label,
89 : u32 mask,
90 : char **next,
91 : unsigned *size)
92 : {
93 : ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n",
94 : label,
95 : mask,
96 : (mask & OHCI_INTR_MIE) ? " MIE" : "",
97 : (mask & OHCI_INTR_OC) ? " OC" : "",
98 : (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
99 : (mask & OHCI_INTR_FNO) ? " FNO" : "",
100 : (mask & OHCI_INTR_UE) ? " UE" : "",
101 : (mask & OHCI_INTR_RD) ? " RD" : "",
102 : (mask & OHCI_INTR_SF) ? " SF" : "",
103 : (mask & OHCI_INTR_WDH) ? " WDH" : "",
104 : (mask & OHCI_INTR_SO) ? " SO" : ""
105 : );
106 : }
107 :
108 : static void maybe_print_eds (
109 : struct ohci_hcd *ohci,
110 : char *label,
111 : u32 value,
112 : char **next,
113 : unsigned *size)
114 : {
115 : if (value)
116 : ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value);
117 : }
118 :
119 : static char *hcfs2string (int state)
120 : {
121 : switch (state) {
122 : case OHCI_USB_RESET: return "reset";
123 : case OHCI_USB_RESUME: return "resume";
124 : case OHCI_USB_OPER: return "operational";
125 : case OHCI_USB_SUSPEND: return "suspend";
126 : }
127 : return "?";
128 : }
129 :
130 : // dump control and status registers
131 : static void
132 : ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size)
133 : {
134 : struct ohci_regs __iomem *regs = controller->regs;
135 : u32 temp;
136 :
137 : temp = ohci_readl (controller, ®s->revision) & 0xff;
138 : ohci_dbg_sw (controller, next, size,
139 : "OHCI %d.%d, %s legacy support registers\n",
140 : 0x03 & (temp >> 4), (temp & 0x0f),
141 : (temp & 0x0100) ? "with" : "NO");
142 :
143 : temp = ohci_readl (controller, ®s->control);
144 : ohci_dbg_sw (controller, next, size,
145 : "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n",
146 : temp,
147 : (temp & OHCI_CTRL_RWE) ? " RWE" : "",
148 : (temp & OHCI_CTRL_RWC) ? " RWC" : "",
149 : (temp & OHCI_CTRL_IR) ? " IR" : "",
150 : hcfs2string (temp & OHCI_CTRL_HCFS),
151 : (temp & OHCI_CTRL_BLE) ? " BLE" : "",
152 : (temp & OHCI_CTRL_CLE) ? " CLE" : "",
153 : (temp & OHCI_CTRL_IE) ? " IE" : "",
154 : (temp & OHCI_CTRL_PLE) ? " PLE" : "",
155 : temp & OHCI_CTRL_CBSR
156 : );
157 :
158 : temp = ohci_readl (controller, ®s->cmdstatus);
159 : ohci_dbg_sw (controller, next, size,
160 : "cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp,
161 : (temp & OHCI_SOC) >> 16,
162 : (temp & OHCI_OCR) ? " OCR" : "",
163 : (temp & OHCI_BLF) ? " BLF" : "",
164 : (temp & OHCI_CLF) ? " CLF" : "",
165 : (temp & OHCI_HCR) ? " HCR" : ""
166 : );
167 :
168 : ohci_dump_intr_mask (controller, "intrstatus",
169 : ohci_readl (controller, ®s->intrstatus),
170 : next, size);
171 : ohci_dump_intr_mask (controller, "intrenable",
172 : ohci_readl (controller, ®s->intrenable),
173 : next, size);
174 : // intrdisable always same as intrenable
175 :
176 : maybe_print_eds (controller, "ed_periodcurrent",
177 : ohci_readl (controller, ®s->ed_periodcurrent),
178 : next, size);
179 :
180 : maybe_print_eds (controller, "ed_controlhead",
181 : ohci_readl (controller, ®s->ed_controlhead),
182 : next, size);
183 : maybe_print_eds (controller, "ed_controlcurrent",
184 : ohci_readl (controller, ®s->ed_controlcurrent),
185 : next, size);
186 :
187 : maybe_print_eds (controller, "ed_bulkhead",
188 : ohci_readl (controller, ®s->ed_bulkhead),
189 : next, size);
190 : maybe_print_eds (controller, "ed_bulkcurrent",
191 : ohci_readl (controller, ®s->ed_bulkcurrent),
192 : next, size);
193 :
194 : maybe_print_eds (controller, "donehead",
195 : ohci_readl (controller, ®s->donehead), next, size);
196 : }
197 :
198 : #define dbg_port_sw(hc,num,value,next,size) \
199 : ohci_dbg_sw (hc, next, size, \
200 : "roothub.portstatus [%d] " \
201 : "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
202 : num, temp, \
203 : (temp & RH_PS_PRSC) ? " PRSC" : "", \
204 : (temp & RH_PS_OCIC) ? " OCIC" : "", \
205 : (temp & RH_PS_PSSC) ? " PSSC" : "", \
206 : (temp & RH_PS_PESC) ? " PESC" : "", \
207 : (temp & RH_PS_CSC) ? " CSC" : "", \
208 : \
209 : (temp & RH_PS_LSDA) ? " LSDA" : "", \
210 : (temp & RH_PS_PPS) ? " PPS" : "", \
211 : (temp & RH_PS_PRS) ? " PRS" : "", \
212 : (temp & RH_PS_POCI) ? " POCI" : "", \
213 : (temp & RH_PS_PSS) ? " PSS" : "", \
214 : \
215 : (temp & RH_PS_PES) ? " PES" : "", \
216 : (temp & RH_PS_CCS) ? " CCS" : "" \
217 : );
218 :
219 :
220 : static void
221 : ohci_dump_roothub (
222 : struct ohci_hcd *controller,
223 : int verbose,
224 : char **next,
225 : unsigned *size)
226 : {
227 : u32 temp, i;
228 :
229 : temp = roothub_a (controller);
230 : if (temp == ~(u32)0)
231 : return;
232 :
233 : if (verbose) {
234 : ohci_dbg_sw (controller, next, size,
235 : "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp,
236 : ((temp & RH_A_POTPGT) >> 24) & 0xff,
237 : (temp & RH_A_NOCP) ? " NOCP" : "",
238 : (temp & RH_A_OCPM) ? " OCPM" : "",
239 : (temp & RH_A_DT) ? " DT" : "",
240 : (temp & RH_A_NPS) ? " NPS" : "",
241 : (temp & RH_A_PSM) ? " PSM" : "",
242 : (temp & RH_A_NDP), controller->num_ports
243 : );
244 : temp = roothub_b (controller);
245 : ohci_dbg_sw (controller, next, size,
246 : "roothub.b %08x PPCM=%04x DR=%04x\n",
247 : temp,
248 : (temp & RH_B_PPCM) >> 16,
249 : (temp & RH_B_DR)
250 : );
251 : temp = roothub_status (controller);
252 : ohci_dbg_sw (controller, next, size,
253 : "roothub.status %08x%s%s%s%s%s%s\n",
254 : temp,
255 : (temp & RH_HS_CRWE) ? " CRWE" : "",
256 : (temp & RH_HS_OCIC) ? " OCIC" : "",
257 : (temp & RH_HS_LPSC) ? " LPSC" : "",
258 : (temp & RH_HS_DRWE) ? " DRWE" : "",
259 : (temp & RH_HS_OCI) ? " OCI" : "",
260 : (temp & RH_HS_LPS) ? " LPS" : ""
261 : );
262 : }
263 :
264 : for (i = 0; i < controller->num_ports; i++) {
265 : temp = roothub_portstatus (controller, i);
266 : dbg_port_sw (controller, i, temp, next, size);
267 : }
268 : }
269 :
270 : static void ohci_dump (struct ohci_hcd *controller, int verbose)
271 : {
272 : ohci_dbg (controller, "OHCI controller state\n");
273 :
274 : // dumps some of the state we know about
275 : ohci_dump_status (controller, NULL, NULL);
276 : if (controller->hcca)
277 : ohci_dbg (controller,
278 : "hcca frame #%04x\n", ohci_frame_no(controller));
279 : ohci_dump_roothub (controller, 1, NULL, NULL);
280 : }
281 :
282 : static const char data0 [] = "DATA0";
283 : static const char data1 [] = "DATA1";
284 :
285 : static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label,
286 : const struct td *td)
287 : {
288 : u32 tmp = hc32_to_cpup (ohci, &td->hwINFO);
289 :
290 : ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n",
291 : label, td,
292 : (tmp & TD_DONE) ? " (DONE)" : "",
293 : td->urb, td->index,
294 : hc32_to_cpup (ohci, &td->hwNextTD));
295 : if ((tmp & TD_ISO) == 0) {
296 : const char *toggle, *pid;
297 : u32 cbp, be;
298 :
299 : switch (tmp & TD_T) {
300 : case TD_T_DATA0: toggle = data0; break;
301 : case TD_T_DATA1: toggle = data1; break;
302 : case TD_T_TOGGLE: toggle = "(CARRY)"; break;
303 : default: toggle = "(?)"; break;
304 : }
305 : switch (tmp & TD_DP) {
306 : case TD_DP_SETUP: pid = "SETUP"; break;
307 : case TD_DP_IN: pid = "IN"; break;
308 : case TD_DP_OUT: pid = "OUT"; break;
309 : default: pid = "(bad pid)"; break;
310 : }
311 : ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp,
312 : TD_CC_GET(tmp), /* EC, */ toggle,
313 : (tmp & TD_DI) >> 21, pid,
314 : (tmp & TD_R) ? "R" : "");
315 : cbp = hc32_to_cpup (ohci, &td->hwCBP);
316 : be = hc32_to_cpup (ohci, &td->hwBE);
317 : ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be,
318 : cbp ? (be + 1 - cbp) : 0);
319 : } else {
320 : unsigned i;
321 : ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp,
322 : TD_CC_GET(tmp),
323 : (tmp >> 24) & 0x07,
324 : (tmp & TD_DI) >> 21,
325 : tmp & 0x0000ffff);
326 : ohci_dbg (ohci, " bp0 %08x be %08x\n",
327 : hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff,
328 : hc32_to_cpup (ohci, &td->hwBE));
329 : for (i = 0; i < MAXPSW; i++) {
330 : u16 psw = ohci_hwPSW (ohci, td, i);
331 : int cc = (psw >> 12) & 0x0f;
332 : ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i,
333 : psw, cc,
334 : (cc >= 0x0e) ? "OFFSET" : "SIZE",
335 : psw & 0x0fff);
336 : }
337 : }
338 : }
339 :
340 : /* caller MUST own hcd spinlock if verbose is set! */
341 : static void __maybe_unused
342 : ohci_dump_ed (const struct ohci_hcd *ohci, const char *label,
343 : const struct ed *ed, int verbose)
344 : {
345 : u32 tmp = hc32_to_cpu (ohci, ed->hwINFO);
346 : char *type = "";
347 :
348 : ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n",
349 : label,
350 : ed, ed->state, edstring (ed->type),
351 : hc32_to_cpup (ohci, &ed->hwNextED));
352 : switch (tmp & (ED_IN|ED_OUT)) {
353 : case ED_OUT: type = "-OUT"; break;
354 : case ED_IN: type = "-IN"; break;
355 : /* else from TDs ... control */
356 : }
357 : ohci_dbg (ohci,
358 : " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp,
359 : 0x03ff & (tmp >> 16),
360 : (tmp & ED_DEQUEUE) ? " DQ" : "",
361 : (tmp & ED_ISO) ? " ISO" : "",
362 : (tmp & ED_SKIP) ? " SKIP" : "",
363 : (tmp & ED_LOWSPEED) ? " LOW" : "",
364 : 0x000f & (tmp >> 7),
365 : type,
366 : 0x007f & tmp);
367 : tmp = hc32_to_cpup (ohci, &ed->hwHeadP);
368 : ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n",
369 : tmp,
370 : (tmp & ED_C) ? data1 : data0,
371 : (tmp & ED_H) ? " HALT" : "",
372 : hc32_to_cpup (ohci, &ed->hwTailP),
373 : verbose ? "" : " (not listing)");
374 : if (verbose) {
375 : struct list_head *tmp;
376 :
377 : /* use ed->td_list because HC concurrently modifies
378 : * hwNextTD as it accumulates ed_donelist.
379 : */
380 : list_for_each (tmp, &ed->td_list) {
381 : struct td *td;
382 : td = list_entry (tmp, struct td, td_list);
383 : ohci_dump_td (ohci, " ->", td);
384 : }
385 : }
386 : }
387 :
388 : #else
389 : static inline void ohci_dump (struct ohci_hcd *controller, int verbose) {}
390 :
391 7 : #undef OHCI_VERBOSE_DEBUG
392 :
393 : #endif /* DEBUG */
394 :
395 : /*-------------------------------------------------------------------------*/
396 :
397 : #ifdef STUB_DEBUG_FILES
398 :
399 : static inline void create_debug_files (struct ohci_hcd *bus) { }
400 : static inline void remove_debug_files (struct ohci_hcd *bus) { }
401 7 :
402 : #else
403 :
404 : static int debug_async_open(struct inode *, struct file *);
405 : static int debug_periodic_open(struct inode *, struct file *);
406 : static int debug_registers_open(struct inode *, struct file *);
407 : static int debug_async_open(struct inode *, struct file *);
408 : static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
409 : static int debug_close(struct inode *, struct file *);
410 :
411 : static const struct file_operations debug_async_fops = {
412 : .owner = THIS_MODULE,
413 : .open = debug_async_open,
414 : .read = debug_output,
415 : .release = debug_close,
416 : };
417 : static const struct file_operations debug_periodic_fops = {
418 : .owner = THIS_MODULE,
419 : .open = debug_periodic_open,
420 : .read = debug_output,
421 : .release = debug_close,
422 : };
423 : static const struct file_operations debug_registers_fops = {
424 : .owner = THIS_MODULE,
425 : .open = debug_registers_open,
426 : .read = debug_output,
427 : .release = debug_close,
428 : };
429 :
430 : static struct dentry *ohci_debug_root;
431 :
432 : struct debug_buffer {
433 : ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
434 : struct ohci_hcd *ohci;
435 : struct mutex mutex; /* protect filling of buffer */
436 : size_t count; /* number of characters filled into buffer */
437 : char *page;
438 : };
439 :
440 : static ssize_t
441 : show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed)
442 : {
443 : unsigned temp, size = count;
444 :
445 : if (!ed)
446 : return 0;
447 :
448 : /* print first --> last */
449 : while (ed->ed_prev)
450 : ed = ed->ed_prev;
451 :
452 : /* dump a snapshot of the bulk or control schedule */
453 : while (ed) {
454 : u32 info = hc32_to_cpu (ohci, ed->hwINFO);
455 : u32 headp = hc32_to_cpu (ohci, ed->hwHeadP);
456 : struct list_head *entry;
457 : struct td *td;
458 :
459 : temp = scnprintf (buf, size,
460 : "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s",
461 : ed,
462 : (info & ED_LOWSPEED) ? 'l' : 'f',
463 : info & 0x7f,
464 : (info >> 7) & 0xf,
465 : (info & ED_IN) ? "in" : "out",
466 : 0x03ff & (info >> 16),
467 : info,
468 : (info & ED_SKIP) ? " s" : "",
469 : (headp & ED_H) ? " H" : "",
470 : (headp & ED_C) ? data1 : data0);
471 : size -= temp;
472 : buf += temp;
473 :
474 : list_for_each (entry, &ed->td_list) {
475 : u32 cbp, be;
476 :
477 : td = list_entry (entry, struct td, td_list);
478 : info = hc32_to_cpup (ohci, &td->hwINFO);
479 : cbp = hc32_to_cpup (ohci, &td->hwCBP);
480 : be = hc32_to_cpup (ohci, &td->hwBE);
481 : temp = scnprintf (buf, size,
482 : "\n\ttd %p %s %d cc=%x urb %p (%08x)",
483 : td,
484 : ({ char *pid;
485 : switch (info & TD_DP) {
486 : case TD_DP_SETUP: pid = "setup"; break;
487 : case TD_DP_IN: pid = "in"; break;
488 : case TD_DP_OUT: pid = "out"; break;
489 : default: pid = "(?)"; break;
490 : } pid;}),
491 : cbp ? (be + 1 - cbp) : 0,
492 : TD_CC_GET (info), td->urb, info);
493 : size -= temp;
494 : buf += temp;
495 : }
496 :
497 : temp = scnprintf (buf, size, "\n");
498 : size -= temp;
499 : buf += temp;
500 :
501 : ed = ed->ed_next;
502 : }
503 : return count - size;
504 : }
505 :
506 : static ssize_t fill_async_buffer(struct debug_buffer *buf)
507 : {
508 : struct ohci_hcd *ohci;
509 : size_t temp;
510 : unsigned long flags;
511 :
512 : ohci = buf->ohci;
513 :
514 : /* display control and bulk lists together, for simplicity */
515 : spin_lock_irqsave (&ohci->lock, flags);
516 : temp = show_list(ohci, buf->page, buf->count, ohci->ed_controltail);
517 : temp += show_list(ohci, buf->page + temp, buf->count - temp,
518 : ohci->ed_bulktail);
519 : spin_unlock_irqrestore (&ohci->lock, flags);
520 :
521 : return temp;
522 : }
523 :
524 : #define DBG_SCHED_LIMIT 64
525 :
526 : static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
527 : {
528 : struct ohci_hcd *ohci;
529 : struct ed **seen, *ed;
530 : unsigned long flags;
531 : unsigned temp, size, seen_count;
532 : char *next;
533 : unsigned i;
534 :
535 : if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
536 : return 0;
537 : seen_count = 0;
538 :
539 : ohci = buf->ohci;
540 : next = buf->page;
541 : size = PAGE_SIZE;
542 :
543 : temp = scnprintf (next, size, "size = %d\n", NUM_INTS);
544 : size -= temp;
545 : next += temp;
546 :
547 : /* dump a snapshot of the periodic schedule (and load) */
548 : spin_lock_irqsave (&ohci->lock, flags);
549 : for (i = 0; i < NUM_INTS; i++) {
550 : if (!(ed = ohci->periodic [i]))
551 : continue;
552 :
553 : temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]);
554 : size -= temp;
555 : next += temp;
556 :
557 : do {
558 : temp = scnprintf (next, size, " ed%d/%p",
559 : ed->interval, ed);
560 : size -= temp;
561 : next += temp;
562 : for (temp = 0; temp < seen_count; temp++) {
563 : if (seen [temp] == ed)
564 : break;
565 : }
566 :
567 : /* show more info the first time around */
568 : if (temp == seen_count) {
569 : u32 info = hc32_to_cpu (ohci, ed->hwINFO);
570 : struct list_head *entry;
571 : unsigned qlen = 0;
572 :
573 : /* qlen measured here in TDs, not urbs */
574 : list_for_each (entry, &ed->td_list)
575 : qlen++;
576 :
577 : temp = scnprintf (next, size,
578 : " (%cs dev%d ep%d%s-%s qlen %u"
579 : " max %d %08x%s%s)",
580 : (info & ED_LOWSPEED) ? 'l' : 'f',
581 : info & 0x7f,
582 : (info >> 7) & 0xf,
583 : (info & ED_IN) ? "in" : "out",
584 : (info & ED_ISO) ? "iso" : "int",
585 : qlen,
586 : 0x03ff & (info >> 16),
587 : info,
588 : (info & ED_SKIP) ? " K" : "",
589 : (ed->hwHeadP &
590 : cpu_to_hc32(ohci, ED_H)) ?
591 : " H" : "");
592 : size -= temp;
593 : next += temp;
594 :
595 : if (seen_count < DBG_SCHED_LIMIT)
596 : seen [seen_count++] = ed;
597 :
598 : ed = ed->ed_next;
599 :
600 : } else {
601 : /* we've seen it and what's after */
602 : temp = 0;
603 : ed = NULL;
604 : }
605 :
606 : } while (ed);
607 :
608 : temp = scnprintf (next, size, "\n");
609 : size -= temp;
610 : next += temp;
611 : }
612 : spin_unlock_irqrestore (&ohci->lock, flags);
613 : kfree (seen);
614 :
615 : return PAGE_SIZE - size;
616 : }
617 : #undef DBG_SCHED_LIMIT
618 :
619 : static ssize_t fill_registers_buffer(struct debug_buffer *buf)
620 : {
621 : struct usb_hcd *hcd;
622 : struct ohci_hcd *ohci;
623 : struct ohci_regs __iomem *regs;
624 : unsigned long flags;
625 : unsigned temp, size;
626 : char *next;
627 : u32 rdata;
628 :
629 : ohci = buf->ohci;
630 : hcd = ohci_to_hcd(ohci);
631 : regs = ohci->regs;
632 : next = buf->page;
633 : size = PAGE_SIZE;
634 :
635 : spin_lock_irqsave (&ohci->lock, flags);
636 :
637 : /* dump driver info, then registers in spec order */
638 :
639 : ohci_dbg_sw (ohci, &next, &size,
640 : "bus %s, device %s\n"
641 : "%s\n"
642 : "%s\n",
643 : hcd->self.controller->bus->name,
644 : dev_name(hcd->self.controller),
645 : hcd->product_desc,
646 : hcd_name);
647 :
648 : if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
649 : size -= scnprintf (next, size,
650 : "SUSPENDED (no register access)\n");
651 : goto done;
652 : }
653 :
654 : ohci_dump_status(ohci, &next, &size);
655 :
656 : /* hcca */
657 : if (ohci->hcca)
658 : ohci_dbg_sw (ohci, &next, &size,
659 : "hcca frame 0x%04x\n", ohci_frame_no(ohci));
660 :
661 : /* other registers mostly affect frame timings */
662 : rdata = ohci_readl (ohci, ®s->fminterval);
663 : temp = scnprintf (next, size,
664 : "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n",
665 : rdata, (rdata >> 31) ? "FIT " : "",
666 : (rdata >> 16) & 0xefff, rdata & 0xffff);
667 : size -= temp;
668 : next += temp;
669 :
670 : rdata = ohci_readl (ohci, ®s->fmremaining);
671 : temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n",
672 : rdata, (rdata >> 31) ? "FRT " : "",
673 : rdata & 0x3fff);
674 : size -= temp;
675 : next += temp;
676 :
677 : rdata = ohci_readl (ohci, ®s->periodicstart);
678 : temp = scnprintf (next, size, "periodicstart 0x%04x\n",
679 : rdata & 0x3fff);
680 : size -= temp;
681 : next += temp;
682 :
683 : rdata = ohci_readl (ohci, ®s->lsthresh);
684 : temp = scnprintf (next, size, "lsthresh 0x%04x\n",
685 : rdata & 0x3fff);
686 : size -= temp;
687 : next += temp;
688 :
689 : temp = scnprintf (next, size, "hub poll timer %s\n",
690 : ohci_to_hcd(ohci)->poll_rh ? "ON" : "off");
691 : size -= temp;
692 : next += temp;
693 :
694 : /* roothub */
695 : ohci_dump_roothub (ohci, 1, &next, &size);
696 :
697 : done:
698 : spin_unlock_irqrestore (&ohci->lock, flags);
699 :
700 : return PAGE_SIZE - size;
701 : }
702 :
703 : static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci,
704 : ssize_t (*fill_func)(struct debug_buffer *))
705 : {
706 : struct debug_buffer *buf;
707 :
708 : buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
709 :
710 : if (buf) {
711 : buf->ohci = ohci;
712 : buf->fill_func = fill_func;
713 : mutex_init(&buf->mutex);
714 : }
715 :
716 : return buf;
717 : }
718 :
719 : static int fill_buffer(struct debug_buffer *buf)
720 : {
721 : int ret = 0;
722 :
723 : if (!buf->page)
724 : buf->page = (char *)get_zeroed_page(GFP_KERNEL);
725 :
726 : if (!buf->page) {
727 : ret = -ENOMEM;
728 : goto out;
729 : }
730 :
731 : ret = buf->fill_func(buf);
732 :
733 : if (ret >= 0) {
734 : buf->count = ret;
735 : ret = 0;
736 : }
737 :
738 : out:
739 : return ret;
740 : }
741 :
742 : static ssize_t debug_output(struct file *file, char __user *user_buf,
743 : size_t len, loff_t *offset)
744 : {
745 : struct debug_buffer *buf = file->private_data;
746 : int ret = 0;
747 :
748 : mutex_lock(&buf->mutex);
749 : if (buf->count == 0) {
750 : ret = fill_buffer(buf);
751 : if (ret != 0) {
752 : mutex_unlock(&buf->mutex);
753 : goto out;
754 : }
755 : }
756 : mutex_unlock(&buf->mutex);
757 :
758 : ret = simple_read_from_buffer(user_buf, len, offset,
759 : buf->page, buf->count);
760 :
761 : out:
762 : return ret;
763 :
764 : }
765 :
766 : static int debug_close(struct inode *inode, struct file *file)
767 : {
768 : struct debug_buffer *buf = file->private_data;
769 :
770 : if (buf) {
771 : if (buf->page)
772 : free_page((unsigned long)buf->page);
773 : kfree(buf);
774 : }
775 :
776 : return 0;
777 : }
778 : static int debug_async_open(struct inode *inode, struct file *file)
779 : {
780 : file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
781 :
782 : return file->private_data ? 0 : -ENOMEM;
783 : }
784 :
785 : static int debug_periodic_open(struct inode *inode, struct file *file)
786 : {
787 : file->private_data = alloc_buffer(inode->i_private,
788 : fill_periodic_buffer);
789 :
790 : return file->private_data ? 0 : -ENOMEM;
791 : }
792 :
793 : static int debug_registers_open(struct inode *inode, struct file *file)
794 : {
795 : file->private_data = alloc_buffer(inode->i_private,
796 : fill_registers_buffer);
797 :
798 : return file->private_data ? 0 : -ENOMEM;
799 : }
800 : static inline void create_debug_files (struct ohci_hcd *ohci)
801 : {
802 : struct usb_bus *bus = &ohci_to_hcd(ohci)->self;
803 :
804 : ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root);
805 : if (!ohci->debug_dir)
806 : goto dir_error;
807 :
808 : ohci->debug_async = debugfs_create_file("async", S_IRUGO,
809 : ohci->debug_dir, ohci,
810 : &debug_async_fops);
811 : if (!ohci->debug_async)
812 : goto async_error;
813 :
814 : ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
815 : ohci->debug_dir, ohci,
816 : &debug_periodic_fops);
817 : if (!ohci->debug_periodic)
818 : goto periodic_error;
819 :
820 : ohci->debug_registers = debugfs_create_file("registers", S_IRUGO,
821 : ohci->debug_dir, ohci,
822 : &debug_registers_fops);
823 : if (!ohci->debug_registers)
824 : goto registers_error;
825 :
826 : ohci_dbg (ohci, "created debug files\n");
827 : return;
828 :
829 : registers_error:
830 : debugfs_remove(ohci->debug_periodic);
831 : periodic_error:
832 : debugfs_remove(ohci->debug_async);
833 : async_error:
834 : debugfs_remove(ohci->debug_dir);
835 : dir_error:
836 : ohci->debug_periodic = NULL;
837 : ohci->debug_async = NULL;
838 : ohci->debug_dir = NULL;
839 : }
840 :
841 : static inline void remove_debug_files (struct ohci_hcd *ohci)
842 : {
843 : debugfs_remove(ohci->debug_registers);
844 : debugfs_remove(ohci->debug_periodic);
845 : debugfs_remove(ohci->debug_async);
846 : debugfs_remove(ohci->debug_dir);
847 : }
848 :
849 : #endif
850 :
851 : /*-------------------------------------------------------------------------*/
852 :
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