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Merge branch 'mini2440-dev-unlikely' into mini2440-dev
[linux-2.6/mini2440.git] / drivers / usb / host / ehci-dbg.c
blob874d2000bf92b54b42eb94ab6d80d7f884ebdff2
1 /*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* this file is part of ehci-hcd.c */
20
21 #define ehci_dbg(ehci, fmt, args...) \
22 dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
23 #define ehci_err(ehci, fmt, args...) \
24 dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
25 #define ehci_info(ehci, fmt, args...) \
26 dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
27 #define ehci_warn(ehci, fmt, args...) \
28 dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
29
30 #ifdef VERBOSE_DEBUG
31 # define vdbg dbg
32 # define ehci_vdbg ehci_dbg
33 #else
34 # define vdbg(fmt,args...) do { } while (0)
35 # define ehci_vdbg(ehci, fmt, args...) do { } while (0)
36 #endif
37
38 #ifdef DEBUG
39
40 /* check the values in the HCSPARAMS register
41 * (host controller _Structural_ parameters)
42 * see EHCI spec, Table 2-4 for each value
43 */
44 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
45 {
46 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
47
48 ehci_dbg (ehci,
49 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
50 label, params,
51 HCS_DEBUG_PORT (params),
52 HCS_INDICATOR (params) ? " ind" : "",
53 HCS_N_CC (params),
54 HCS_N_PCC (params),
55 HCS_PORTROUTED (params) ? "" : " ordered",
56 HCS_PPC (params) ? "" : " !ppc",
57 HCS_N_PORTS (params)
58 );
59 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
60 if (HCS_PORTROUTED (params)) {
61 int i;
62 char buf [46], tmp [7], byte;
63
64 buf[0] = 0;
65 for (i = 0; i < HCS_N_PORTS (params); i++) {
66 // FIXME MIPS won't readb() ...
67 byte = readb (&ehci->caps->portroute[(i>>1)]);
68 sprintf(tmp, "%d ",
69 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
70 strcat(buf, tmp);
71 }
72 ehci_dbg (ehci, "%s portroute %s\n",
73 label, buf);
74 }
75 }
76 #else
77
78 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
79
80 #endif
81
82 #ifdef DEBUG
83
84 /* check the values in the HCCPARAMS register
85 * (host controller _Capability_ parameters)
86 * see EHCI Spec, Table 2-5 for each value
87 * */
88 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
89 {
90 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
91
92 if (HCC_ISOC_CACHE (params)) {
93 ehci_dbg (ehci,
94 "%s hcc_params %04x caching frame %s%s%s\n",
95 label, params,
96 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
97 HCC_CANPARK(params) ? " park" : "",
98 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
99 } else {
100 ehci_dbg (ehci,
101 "%s hcc_params %04x thresh %d uframes %s%s%s\n",
102 label,
103 params,
104 HCC_ISOC_THRES(params),
105 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
106 HCC_CANPARK(params) ? " park" : "",
107 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
108 }
109 }
110 #else
111
112 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
113
114 #endif
115
116 #ifdef DEBUG
117
118 static void __maybe_unused
119 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
120 {
121 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
122 hc32_to_cpup(ehci, &qtd->hw_next),
123 hc32_to_cpup(ehci, &qtd->hw_alt_next),
124 hc32_to_cpup(ehci, &qtd->hw_token),
125 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
126 if (qtd->hw_buf [1])
127 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
128 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
129 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
130 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
131 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
132 }
133
134 static void __maybe_unused
135 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
136 {
137 struct ehci_qh_hw *hw = qh->hw;
138
139 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
140 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
141 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
142 }
143
144 static void __maybe_unused
145 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
146 {
147 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
148 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
149 itd->urb);
150 ehci_dbg (ehci,
151 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
152 hc32_to_cpu(ehci, itd->hw_transaction[0]),
153 hc32_to_cpu(ehci, itd->hw_transaction[1]),
154 hc32_to_cpu(ehci, itd->hw_transaction[2]),
155 hc32_to_cpu(ehci, itd->hw_transaction[3]),
156 hc32_to_cpu(ehci, itd->hw_transaction[4]),
157 hc32_to_cpu(ehci, itd->hw_transaction[5]),
158 hc32_to_cpu(ehci, itd->hw_transaction[6]),
159 hc32_to_cpu(ehci, itd->hw_transaction[7]));
160 ehci_dbg (ehci,
161 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
162 hc32_to_cpu(ehci, itd->hw_bufp[0]),
163 hc32_to_cpu(ehci, itd->hw_bufp[1]),
164 hc32_to_cpu(ehci, itd->hw_bufp[2]),
165 hc32_to_cpu(ehci, itd->hw_bufp[3]),
166 hc32_to_cpu(ehci, itd->hw_bufp[4]),
167 hc32_to_cpu(ehci, itd->hw_bufp[5]),
168 hc32_to_cpu(ehci, itd->hw_bufp[6]));
169 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
170 itd->index[0], itd->index[1], itd->index[2],
171 itd->index[3], itd->index[4], itd->index[5],
172 itd->index[6], itd->index[7]);
173 }
174
175 static void __maybe_unused
176 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
177 {
178 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
179 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
180 sitd->urb);
181 ehci_dbg (ehci,
182 " addr %08x sched %04x result %08x buf %08x %08x\n",
183 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
184 hc32_to_cpu(ehci, sitd->hw_uframe),
185 hc32_to_cpu(ehci, sitd->hw_results),
186 hc32_to_cpu(ehci, sitd->hw_buf[0]),
187 hc32_to_cpu(ehci, sitd->hw_buf[1]));
188 }
189
190 static int __maybe_unused
191 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
192 {
193 return scnprintf (buf, len,
194 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
195 label, label [0] ? " " : "", status,
196 (status & STS_ASS) ? " Async" : "",
197 (status & STS_PSS) ? " Periodic" : "",
198 (status & STS_RECL) ? " Recl" : "",
199 (status & STS_HALT) ? " Halt" : "",
200 (status & STS_IAA) ? " IAA" : "",
201 (status & STS_FATAL) ? " FATAL" : "",
202 (status & STS_FLR) ? " FLR" : "",
203 (status & STS_PCD) ? " PCD" : "",
204 (status & STS_ERR) ? " ERR" : "",
205 (status & STS_INT) ? " INT" : ""
206 );
207 }
208
209 static int __maybe_unused
210 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
211 {
212 return scnprintf (buf, len,
213 "%s%sintrenable %02x%s%s%s%s%s%s",
214 label, label [0] ? " " : "", enable,
215 (enable & STS_IAA) ? " IAA" : "",
216 (enable & STS_FATAL) ? " FATAL" : "",
217 (enable & STS_FLR) ? " FLR" : "",
218 (enable & STS_PCD) ? " PCD" : "",
219 (enable & STS_ERR) ? " ERR" : "",
220 (enable & STS_INT) ? " INT" : ""
221 );
222 }
223
224 static const char *const fls_strings [] =
225 { "1024", "512", "256", "??" };
226
227 static int
228 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
229 {
230 return scnprintf (buf, len,
231 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
232 label, label [0] ? " " : "", command,
233 (command & CMD_PARK) ? "park" : "(park)",
234 CMD_PARK_CNT (command),
235 (command >> 16) & 0x3f,
236 (command & CMD_LRESET) ? " LReset" : "",
237 (command & CMD_IAAD) ? " IAAD" : "",
238 (command & CMD_ASE) ? " Async" : "",
239 (command & CMD_PSE) ? " Periodic" : "",
240 fls_strings [(command >> 2) & 0x3],
241 (command & CMD_RESET) ? " Reset" : "",
242 (command & CMD_RUN) ? "RUN" : "HALT"
243 );
244 }
245
246 static int
247 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
248 {
249 char *sig;
250
251 /* signaling state */
252 switch (status & (3 << 10)) {
253 case 0 << 10: sig = "se0"; break;
254 case 1 << 10: sig = "k"; break; /* low speed */
255 case 2 << 10: sig = "j"; break;
256 default: sig = "?"; break;
257 }
258
259 return scnprintf (buf, len,
260 "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s",
261 label, label [0] ? " " : "", port, status,
262 (status & PORT_POWER) ? " POWER" : "",
263 (status & PORT_OWNER) ? " OWNER" : "",
264 sig,
265 (status & PORT_RESET) ? " RESET" : "",
266 (status & PORT_SUSPEND) ? " SUSPEND" : "",
267 (status & PORT_RESUME) ? " RESUME" : "",
268 (status & PORT_OCC) ? " OCC" : "",
269 (status & PORT_OC) ? " OC" : "",
270 (status & PORT_PEC) ? " PEC" : "",
271 (status & PORT_PE) ? " PE" : "",
272 (status & PORT_CSC) ? " CSC" : "",
273 (status & PORT_CONNECT) ? " CONNECT" : "");
274 }
275
276 #else
277 static inline void __maybe_unused
278 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
279 {}
280
281 static inline int __maybe_unused
282 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
283 { return 0; }
284
285 static inline int __maybe_unused
286 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
287 { return 0; }
288
289 static inline int __maybe_unused
290 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
291 { return 0; }
292
293 static inline int __maybe_unused
294 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
295 { return 0; }
296
297 #endif /* DEBUG */
298
299 /* functions have the "wrong" filename when they're output... */
300 #define dbg_status(ehci, label, status) { \
301 char _buf [80]; \
302 dbg_status_buf (_buf, sizeof _buf, label, status); \
303 ehci_dbg (ehci, "%s\n", _buf); \
304 }
305
306 #define dbg_cmd(ehci, label, command) { \
307 char _buf [80]; \
308 dbg_command_buf (_buf, sizeof _buf, label, command); \
309 ehci_dbg (ehci, "%s\n", _buf); \
310 }
311
312 #define dbg_port(ehci, label, port, status) { \
313 char _buf [80]; \
314 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
315 ehci_dbg (ehci, "%s\n", _buf); \
316 }
317
318 /*-------------------------------------------------------------------------*/
319
320 #ifdef STUB_DEBUG_FILES
321
322 static inline void create_debug_files (struct ehci_hcd *bus) { }
323 static inline void remove_debug_files (struct ehci_hcd *bus) { }
324
325 #else
326
327 /* troubleshooting help: expose state in debugfs */
328
329 static int debug_async_open(struct inode *, struct file *);
330 static int debug_periodic_open(struct inode *, struct file *);
331 static int debug_registers_open(struct inode *, struct file *);
332 static int debug_async_open(struct inode *, struct file *);
333 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
334 static int debug_close(struct inode *, struct file *);
335
336 static const struct file_operations debug_async_fops = {
337 .owner = THIS_MODULE,
338 .open = debug_async_open,
339 .read = debug_output,
340 .release = debug_close,
341 };
342 static const struct file_operations debug_periodic_fops = {
343 .owner = THIS_MODULE,
344 .open = debug_periodic_open,
345 .read = debug_output,
346 .release = debug_close,
347 };
348 static const struct file_operations debug_registers_fops = {
349 .owner = THIS_MODULE,
350 .open = debug_registers_open,
351 .read = debug_output,
352 .release = debug_close,
353 };
354
355 static struct dentry *ehci_debug_root;
356
357 struct debug_buffer {
358 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
359 struct usb_bus *bus;
360 struct mutex mutex; /* protect filling of buffer */
361 size_t count; /* number of characters filled into buffer */
362 char *output_buf;
363 size_t alloc_size;
364 };
365
366 #define speed_char(info1) ({ char tmp; \
367 switch (info1 & (3 << 12)) { \
368 case 0 << 12: tmp = 'f'; break; \
369 case 1 << 12: tmp = 'l'; break; \
370 case 2 << 12: tmp = 'h'; break; \
371 default: tmp = '?'; break; \
372 }; tmp; })
373
374 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
375 {
376 __u32 v = hc32_to_cpu(ehci, token);
377
378 if (v & QTD_STS_ACTIVE)
379 return '*';
380 if (v & QTD_STS_HALT)
381 return '-';
382 if (!IS_SHORT_READ (v))
383 return ' ';
384 /* tries to advance through hw_alt_next */
385 return '/';
386 }
387
388 static void qh_lines (
389 struct ehci_hcd *ehci,
390 struct ehci_qh *qh,
391 char **nextp,
392 unsigned *sizep
393 )
394 {
395 u32 scratch;
396 u32 hw_curr;
397 struct list_head *entry;
398 struct ehci_qtd *td;
399 unsigned temp;
400 unsigned size = *sizep;
401 char *next = *nextp;
402 char mark;
403 __le32 list_end = EHCI_LIST_END(ehci);
404 struct ehci_qh_hw *hw = qh->hw;
405
406 if (hw->hw_qtd_next == list_end) /* NEC does this */
407 mark = '@';
408 else
409 mark = token_mark(ehci, hw->hw_token);
410 if (mark == '/') { /* qh_alt_next controls qh advance? */
411 if ((hw->hw_alt_next & QTD_MASK(ehci))
412 == ehci->async->hw->hw_alt_next)
413 mark = '#'; /* blocked */
414 else if (hw->hw_alt_next == list_end)
415 mark = '.'; /* use hw_qtd_next */
416 /* else alt_next points to some other qtd */
417 }
418 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
419 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
420 temp = scnprintf (next, size,
421 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
422 qh, scratch & 0x007f,
423 speed_char (scratch),
424 (scratch >> 8) & 0x000f,
425 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
426 hc32_to_cpup(ehci, &hw->hw_token), mark,
427 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
428 ? "data1" : "data0",
429 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
430 size -= temp;
431 next += temp;
432
433 /* hc may be modifying the list as we read it ... */
434 list_for_each (entry, &qh->qtd_list) {
435 td = list_entry (entry, struct ehci_qtd, qtd_list);
436 scratch = hc32_to_cpup(ehci, &td->hw_token);
437 mark = ' ';
438 if (hw_curr == td->qtd_dma)
439 mark = '*';
440 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
441 mark = '+';
442 else if (QTD_LENGTH (scratch)) {
443 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
444 mark = '#';
445 else if (td->hw_alt_next != list_end)
446 mark = '/';
447 }
448 temp = snprintf (next, size,
449 "\n\t%p%c%s len=%d %08x urb %p",
450 td, mark, ({ char *tmp;
451 switch ((scratch>>8)&0x03) {
452 case 0: tmp = "out"; break;
453 case 1: tmp = "in"; break;
454 case 2: tmp = "setup"; break;
455 default: tmp = "?"; break;
456 } tmp;}),
457 (scratch >> 16) & 0x7fff,
458 scratch,
459 td->urb);
460 if (size < temp)
461 temp = size;
462 size -= temp;
463 next += temp;
464 if (temp == size)
465 goto done;
466 }
467
468 temp = snprintf (next, size, "\n");
469 if (size < temp)
470 temp = size;
471 size -= temp;
472 next += temp;
473
474 done:
475 *sizep = size;
476 *nextp = next;
477 }
478
479 static ssize_t fill_async_buffer(struct debug_buffer *buf)
480 {
481 struct usb_hcd *hcd;
482 struct ehci_hcd *ehci;
483 unsigned long flags;
484 unsigned temp, size;
485 char *next;
486 struct ehci_qh *qh;
487
488 hcd = bus_to_hcd(buf->bus);
489 ehci = hcd_to_ehci (hcd);
490 next = buf->output_buf;
491 size = buf->alloc_size;
492
493 *next = 0;
494
495 /* dumps a snapshot of the async schedule.
496 * usually empty except for long-term bulk reads, or head.
497 * one QH per line, and TDs we know about
498 */
499 spin_lock_irqsave (&ehci->lock, flags);
500 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
501 qh_lines (ehci, qh, &next, &size);
502 if (ehci->reclaim && size > 0) {
503 temp = scnprintf (next, size, "\nreclaim =\n");
504 size -= temp;
505 next += temp;
506
507 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
508 qh_lines (ehci, qh, &next, &size);
509 }
510 spin_unlock_irqrestore (&ehci->lock, flags);
511
512 return strlen(buf->output_buf);
513 }
514
515 #define DBG_SCHED_LIMIT 64
516 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
517 {
518 struct usb_hcd *hcd;
519 struct ehci_hcd *ehci;
520 unsigned long flags;
521 union ehci_shadow p, *seen;
522 unsigned temp, size, seen_count;
523 char *next;
524 unsigned i;
525 __hc32 tag;
526
527 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
528 return 0;
529 seen_count = 0;
530
531 hcd = bus_to_hcd(buf->bus);
532 ehci = hcd_to_ehci (hcd);
533 next = buf->output_buf;
534 size = buf->alloc_size;
535
536 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
537 size -= temp;
538 next += temp;
539
540 /* dump a snapshot of the periodic schedule.
541 * iso changes, interrupt usually doesn't.
542 */
543 spin_lock_irqsave (&ehci->lock, flags);
544 for (i = 0; i < ehci->periodic_size; i++) {
545 p = ehci->pshadow [i];
546 if (likely (!p.ptr))
547 continue;
548 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
549
550 temp = scnprintf (next, size, "%4d: ", i);
551 size -= temp;
552 next += temp;
553
554 do {
555 struct ehci_qh_hw *hw;
556
557 switch (hc32_to_cpu(ehci, tag)) {
558 case Q_TYPE_QH:
559 hw = p.qh->hw;
560 temp = scnprintf (next, size, " qh%d-%04x/%p",
561 p.qh->period,
562 hc32_to_cpup(ehci,
563 &hw->hw_info2)
564 /* uframe masks */
565 & (QH_CMASK | QH_SMASK),
566 p.qh);
567 size -= temp;
568 next += temp;
569 /* don't repeat what follows this qh */
570 for (temp = 0; temp < seen_count; temp++) {
571 if (seen [temp].ptr != p.ptr)
572 continue;
573 if (p.qh->qh_next.ptr) {
574 temp = scnprintf (next, size,
575 " ...");
576 size -= temp;
577 next += temp;
578 }
579 break;
580 }
581 /* show more info the first time around */
582 if (temp == seen_count) {
583 u32 scratch = hc32_to_cpup(ehci,
584 &hw->hw_info1);
585 struct ehci_qtd *qtd;
586 char *type = "";
587
588 /* count tds, get ep direction */
589 temp = 0;
590 list_for_each_entry (qtd,
591 &p.qh->qtd_list,
592 qtd_list) {
593 temp++;
594 switch (0x03 & (hc32_to_cpu(
595 ehci,
596 qtd->hw_token) >> 8)) {
597 case 0: type = "out"; continue;
598 case 1: type = "in"; continue;
599 }
600 }
601
602 temp = scnprintf (next, size,
603 " (%c%d ep%d%s "
604 "[%d/%d] q%d p%d)",
605 speed_char (scratch),
606 scratch & 0x007f,
607 (scratch >> 8) & 0x000f, type,
608 p.qh->usecs, p.qh->c_usecs,
609 temp,
610 0x7ff & (scratch >> 16));
611
612 if (seen_count < DBG_SCHED_LIMIT)
613 seen [seen_count++].qh = p.qh;
614 } else
615 temp = 0;
616 if (p.qh) {
617 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
618 p = p.qh->qh_next;
619 }
620 break;
621 case Q_TYPE_FSTN:
622 temp = scnprintf (next, size,
623 " fstn-%8x/%p", p.fstn->hw_prev,
624 p.fstn);
625 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
626 p = p.fstn->fstn_next;
627 break;
628 case Q_TYPE_ITD:
629 temp = scnprintf (next, size,
630 " itd/%p", p.itd);
631 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
632 p = p.itd->itd_next;
633 break;
634 case Q_TYPE_SITD:
635 temp = scnprintf (next, size,
636 " sitd%d-%04x/%p",
637 p.sitd->stream->interval,
638 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
639 & 0x0000ffff,
640 p.sitd);
641 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
642 p = p.sitd->sitd_next;
643 break;
644 }
645 size -= temp;
646 next += temp;
647 } while (p.ptr);
648
649 temp = scnprintf (next, size, "\n");
650 size -= temp;
651 next += temp;
652 }
653 spin_unlock_irqrestore (&ehci->lock, flags);
654 kfree (seen);
655
656 return buf->alloc_size - size;
657 }
658 #undef DBG_SCHED_LIMIT
659
660 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
661 {
662 struct usb_hcd *hcd;
663 struct ehci_hcd *ehci;
664 unsigned long flags;
665 unsigned temp, size, i;
666 char *next, scratch [80];
667 static char fmt [] = "%*s\n";
668 static char label [] = "";
669
670 hcd = bus_to_hcd(buf->bus);
671 ehci = hcd_to_ehci (hcd);
672 next = buf->output_buf;
673 size = buf->alloc_size;
674
675 spin_lock_irqsave (&ehci->lock, flags);
676
677 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
678 size = scnprintf (next, size,
679 "bus %s, device %s\n"
680 "%s\n"
681 "SUSPENDED (no register access)\n",
682 hcd->self.controller->bus->name,
683 dev_name(hcd->self.controller),
684 hcd->product_desc);
685 goto done;
686 }
687
688 /* Capability Registers */
689 i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
690 temp = scnprintf (next, size,
691 "bus %s, device %s\n"
692 "%s\n"
693 "EHCI %x.%02x, hcd state %d\n",
694 hcd->self.controller->bus->name,
695 dev_name(hcd->self.controller),
696 hcd->product_desc,
697 i >> 8, i & 0x0ff, hcd->state);
698 size -= temp;
699 next += temp;
700
701 #ifdef CONFIG_PCI
702 /* EHCI 0.96 and later may have "extended capabilities" */
703 if (hcd->self.controller->bus == &pci_bus_type) {
704 struct pci_dev *pdev;
705 u32 offset, cap, cap2;
706 unsigned count = 256/4;
707
708 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
709 offset = HCC_EXT_CAPS(ehci_readl(ehci,
710 &ehci->caps->hcc_params));
711 while (offset && count--) {
712 pci_read_config_dword (pdev, offset, &cap);
713 switch (cap & 0xff) {
714 case 1:
715 temp = scnprintf (next, size,
716 "ownership %08x%s%s\n", cap,
717 (cap & (1 << 24)) ? " linux" : "",
718 (cap & (1 << 16)) ? " firmware" : "");
719 size -= temp;
720 next += temp;
721
722 offset += 4;
723 pci_read_config_dword (pdev, offset, &cap2);
724 temp = scnprintf (next, size,
725 "SMI sts/enable 0x%08x\n", cap2);
726 size -= temp;
727 next += temp;
728 break;
729 case 0: /* illegal reserved capability */
730 cap = 0;
731 /* FALLTHROUGH */
732 default: /* unknown */
733 break;
734 }
735 temp = (cap >> 8) & 0xff;
736 }
737 }
738 #endif
739
740 // FIXME interpret both types of params
741 i = ehci_readl(ehci, &ehci->caps->hcs_params);
742 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
743 size -= temp;
744 next += temp;
745
746 i = ehci_readl(ehci, &ehci->caps->hcc_params);
747 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
748 size -= temp;
749 next += temp;
750
751 /* Operational Registers */
752 temp = dbg_status_buf (scratch, sizeof scratch, label,
753 ehci_readl(ehci, &ehci->regs->status));
754 temp = scnprintf (next, size, fmt, temp, scratch);
755 size -= temp;
756 next += temp;
757
758 temp = dbg_command_buf (scratch, sizeof scratch, label,
759 ehci_readl(ehci, &ehci->regs->command));
760 temp = scnprintf (next, size, fmt, temp, scratch);
761 size -= temp;
762 next += temp;
763
764 temp = dbg_intr_buf (scratch, sizeof scratch, label,
765 ehci_readl(ehci, &ehci->regs->intr_enable));
766 temp = scnprintf (next, size, fmt, temp, scratch);
767 size -= temp;
768 next += temp;
769
770 temp = scnprintf (next, size, "uframe %04x\n",
771 ehci_readl(ehci, &ehci->regs->frame_index));
772 size -= temp;
773 next += temp;
774
775 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
776 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
777 ehci_readl(ehci,
778 &ehci->regs->port_status[i - 1]));
779 temp = scnprintf (next, size, fmt, temp, scratch);
780 size -= temp;
781 next += temp;
782 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
783 temp = scnprintf (next, size,
784 " debug control %08x\n",
785 ehci_readl(ehci,
786 &ehci->debug->control));
787 size -= temp;
788 next += temp;
789 }
790 }
791
792 if (ehci->reclaim) {
793 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
794 size -= temp;
795 next += temp;
796 }
797
798 #ifdef EHCI_STATS
799 temp = scnprintf (next, size,
800 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
801 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
802 ehci->stats.lost_iaa);
803 size -= temp;
804 next += temp;
805
806 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
807 ehci->stats.complete, ehci->stats.unlink);
808 size -= temp;
809 next += temp;
810 #endif
811
812 done:
813 spin_unlock_irqrestore (&ehci->lock, flags);
814
815 return buf->alloc_size - size;
816 }
817
818 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
819 ssize_t (*fill_func)(struct debug_buffer *))
820 {
821 struct debug_buffer *buf;
822
823 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
824
825 if (buf) {
826 buf->bus = bus;
827 buf->fill_func = fill_func;
828 mutex_init(&buf->mutex);
829 buf->alloc_size = PAGE_SIZE;
830 }
831
832 return buf;
833 }
834
835 static int fill_buffer(struct debug_buffer *buf)
836 {
837 int ret = 0;
838
839 if (!buf->output_buf)
840 buf->output_buf = (char *)vmalloc(buf->alloc_size);
841
842 if (!buf->output_buf) {
843 ret = -ENOMEM;
844 goto out;
845 }
846
847 ret = buf->fill_func(buf);
848
849 if (ret >= 0) {
850 buf->count = ret;
851 ret = 0;
852 }
853
854 out:
855 return ret;
856 }
857
858 static ssize_t debug_output(struct file *file, char __user *user_buf,
859 size_t len, loff_t *offset)
860 {
861 struct debug_buffer *buf = file->private_data;
862 int ret = 0;
863
864 mutex_lock(&buf->mutex);
865 if (buf->count == 0) {
866 ret = fill_buffer(buf);
867 if (ret != 0) {
868 mutex_unlock(&buf->mutex);
869 goto out;
870 }
871 }
872 mutex_unlock(&buf->mutex);
873
874 ret = simple_read_from_buffer(user_buf, len, offset,
875 buf->output_buf, buf->count);
876
877 out:
878 return ret;
879
880 }
881
882 static int debug_close(struct inode *inode, struct file *file)
883 {
884 struct debug_buffer *buf = file->private_data;
885
886 if (buf) {
887 vfree(buf->output_buf);
888 kfree(buf);
889 }
890
891 return 0;
892 }
893 static int debug_async_open(struct inode *inode, struct file *file)
894 {
895 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
896
897 return file->private_data ? 0 : -ENOMEM;
898 }
899
900 static int debug_periodic_open(struct inode *inode, struct file *file)
901 {
902 struct debug_buffer *buf;
903 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
904 if (!buf)
905 return -ENOMEM;
906
907 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
908 file->private_data = buf;
909 return 0;
910 }
911
912 static int debug_registers_open(struct inode *inode, struct file *file)
913 {
914 file->private_data = alloc_buffer(inode->i_private,
915 fill_registers_buffer);
916
917 return file->private_data ? 0 : -ENOMEM;
918 }
919
920 static inline void create_debug_files (struct ehci_hcd *ehci)
921 {
922 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
923
924 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
925 if (!ehci->debug_dir)
926 goto dir_error;
927
928 ehci->debug_async = debugfs_create_file("async", S_IRUGO,
929 ehci->debug_dir, bus,
930 &debug_async_fops);
931 if (!ehci->debug_async)
932 goto async_error;
933
934 ehci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
935 ehci->debug_dir, bus,
936 &debug_periodic_fops);
937 if (!ehci->debug_periodic)
938 goto periodic_error;
939
940 ehci->debug_registers = debugfs_create_file("registers", S_IRUGO,
941 ehci->debug_dir, bus,
942 &debug_registers_fops);
943 if (!ehci->debug_registers)
944 goto registers_error;
945 return;
946
947 registers_error:
948 debugfs_remove(ehci->debug_periodic);
949 periodic_error:
950 debugfs_remove(ehci->debug_async);
951 async_error:
952 debugfs_remove(ehci->debug_dir);
953 dir_error:
954 ehci->debug_periodic = NULL;
955 ehci->debug_async = NULL;
956 ehci->debug_dir = NULL;
957 }
958
959 static inline void remove_debug_files (struct ehci_hcd *ehci)
960 {
961 debugfs_remove(ehci->debug_registers);
962 debugfs_remove(ehci->debug_periodic);
963 debugfs_remove(ehci->debug_async);
964 debugfs_remove(ehci->debug_dir);
965 }
966
967 #endif /* STUB_DEBUG_FILES */
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