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USB: EHCI: add separate IAA watchdog timer
[linux-2.6/mini2440.git] / drivers / usb / host / ehci-dbg.c
blob64ebfc5548a31c04735bcb428aa040a68e4a2598
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 EHCI_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 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
138 qh, qh->hw_next, qh->hw_info1, qh->hw_info2,
139 qh->hw_current);
140 dbg_qtd ("overlay", ehci, (struct ehci_qtd *) &qh->hw_qtd_next);
141 }
142
143 static void __maybe_unused
144 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
145 {
146 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
147 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
148 itd->urb);
149 ehci_dbg (ehci,
150 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
151 hc32_to_cpu(ehci, itd->hw_transaction[0]),
152 hc32_to_cpu(ehci, itd->hw_transaction[1]),
153 hc32_to_cpu(ehci, itd->hw_transaction[2]),
154 hc32_to_cpu(ehci, itd->hw_transaction[3]),
155 hc32_to_cpu(ehci, itd->hw_transaction[4]),
156 hc32_to_cpu(ehci, itd->hw_transaction[5]),
157 hc32_to_cpu(ehci, itd->hw_transaction[6]),
158 hc32_to_cpu(ehci, itd->hw_transaction[7]));
159 ehci_dbg (ehci,
160 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
161 hc32_to_cpu(ehci, itd->hw_bufp[0]),
162 hc32_to_cpu(ehci, itd->hw_bufp[1]),
163 hc32_to_cpu(ehci, itd->hw_bufp[2]),
164 hc32_to_cpu(ehci, itd->hw_bufp[3]),
165 hc32_to_cpu(ehci, itd->hw_bufp[4]),
166 hc32_to_cpu(ehci, itd->hw_bufp[5]),
167 hc32_to_cpu(ehci, itd->hw_bufp[6]));
168 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
169 itd->index[0], itd->index[1], itd->index[2],
170 itd->index[3], itd->index[4], itd->index[5],
171 itd->index[6], itd->index[7]);
172 }
173
174 static void __maybe_unused
175 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
176 {
177 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
178 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
179 sitd->urb);
180 ehci_dbg (ehci,
181 " addr %08x sched %04x result %08x buf %08x %08x\n",
182 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
183 hc32_to_cpu(ehci, sitd->hw_uframe),
184 hc32_to_cpu(ehci, sitd->hw_results),
185 hc32_to_cpu(ehci, sitd->hw_buf[0]),
186 hc32_to_cpu(ehci, sitd->hw_buf[1]));
187 }
188
189 static int __maybe_unused
190 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
191 {
192 return scnprintf (buf, len,
193 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
194 label, label [0] ? " " : "", status,
195 (status & STS_ASS) ? " Async" : "",
196 (status & STS_PSS) ? " Periodic" : "",
197 (status & STS_RECL) ? " Recl" : "",
198 (status & STS_HALT) ? " Halt" : "",
199 (status & STS_IAA) ? " IAA" : "",
200 (status & STS_FATAL) ? " FATAL" : "",
201 (status & STS_FLR) ? " FLR" : "",
202 (status & STS_PCD) ? " PCD" : "",
203 (status & STS_ERR) ? " ERR" : "",
204 (status & STS_INT) ? " INT" : ""
205 );
206 }
207
208 static int __maybe_unused
209 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
210 {
211 return scnprintf (buf, len,
212 "%s%sintrenable %02x%s%s%s%s%s%s",
213 label, label [0] ? " " : "", enable,
214 (enable & STS_IAA) ? " IAA" : "",
215 (enable & STS_FATAL) ? " FATAL" : "",
216 (enable & STS_FLR) ? " FLR" : "",
217 (enable & STS_PCD) ? " PCD" : "",
218 (enable & STS_ERR) ? " ERR" : "",
219 (enable & STS_INT) ? " INT" : ""
220 );
221 }
222
223 static const char *const fls_strings [] =
224 { "1024", "512", "256", "??" };
225
226 static int
227 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
228 {
229 return scnprintf (buf, len,
230 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
231 label, label [0] ? " " : "", command,
232 (command & CMD_PARK) ? "park" : "(park)",
233 CMD_PARK_CNT (command),
234 (command >> 16) & 0x3f,
235 (command & CMD_LRESET) ? " LReset" : "",
236 (command & CMD_IAAD) ? " IAAD" : "",
237 (command & CMD_ASE) ? " Async" : "",
238 (command & CMD_PSE) ? " Periodic" : "",
239 fls_strings [(command >> 2) & 0x3],
240 (command & CMD_RESET) ? " Reset" : "",
241 (command & CMD_RUN) ? "RUN" : "HALT"
242 );
243 }
244
245 static int
246 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
247 {
248 char *sig;
249
250 /* signaling state */
251 switch (status & (3 << 10)) {
252 case 0 << 10: sig = "se0"; break;
253 case 1 << 10: sig = "k"; break; /* low speed */
254 case 2 << 10: sig = "j"; break;
255 default: sig = "?"; break;
256 }
257
258 return scnprintf (buf, len,
259 "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s",
260 label, label [0] ? " " : "", port, status,
261 (status & PORT_POWER) ? " POWER" : "",
262 (status & PORT_OWNER) ? " OWNER" : "",
263 sig,
264 (status & PORT_RESET) ? " RESET" : "",
265 (status & PORT_SUSPEND) ? " SUSPEND" : "",
266 (status & PORT_RESUME) ? " RESUME" : "",
267 (status & PORT_OCC) ? " OCC" : "",
268 (status & PORT_OC) ? " OC" : "",
269 (status & PORT_PEC) ? " PEC" : "",
270 (status & PORT_PE) ? " PE" : "",
271 (status & PORT_CSC) ? " CSC" : "",
272 (status & PORT_CONNECT) ? " CONNECT" : "");
273 }
274
275 #else
276 static inline void __maybe_unused
277 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
278 {}
279
280 static inline int __maybe_unused
281 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
282 { return 0; }
283
284 static inline int __maybe_unused
285 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
286 { return 0; }
287
288 static inline int __maybe_unused
289 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
290 { return 0; }
291
292 static inline int __maybe_unused
293 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
294 { return 0; }
295
296 #endif /* DEBUG */
297
298 /* functions have the "wrong" filename when they're output... */
299 #define dbg_status(ehci, label, status) { \
300 char _buf [80]; \
301 dbg_status_buf (_buf, sizeof _buf, label, status); \
302 ehci_dbg (ehci, "%s\n", _buf); \
303 }
304
305 #define dbg_cmd(ehci, label, command) { \
306 char _buf [80]; \
307 dbg_command_buf (_buf, sizeof _buf, label, command); \
308 ehci_dbg (ehci, "%s\n", _buf); \
309 }
310
311 #define dbg_port(ehci, label, port, status) { \
312 char _buf [80]; \
313 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
314 ehci_dbg (ehci, "%s\n", _buf); \
315 }
316
317 /*-------------------------------------------------------------------------*/
318
319 #ifdef STUB_DEBUG_FILES
320
321 static inline void create_debug_files (struct ehci_hcd *bus) { }
322 static inline void remove_debug_files (struct ehci_hcd *bus) { }
323
324 #else
325
326 /* troubleshooting help: expose state in debugfs */
327
328 static int debug_async_open(struct inode *, struct file *);
329 static int debug_periodic_open(struct inode *, struct file *);
330 static int debug_registers_open(struct inode *, struct file *);
331 static int debug_async_open(struct inode *, struct file *);
332 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
333 static int debug_close(struct inode *, struct file *);
334
335 static const struct file_operations debug_async_fops = {
336 .owner = THIS_MODULE,
337 .open = debug_async_open,
338 .read = debug_output,
339 .release = debug_close,
340 };
341 static const struct file_operations debug_periodic_fops = {
342 .owner = THIS_MODULE,
343 .open = debug_periodic_open,
344 .read = debug_output,
345 .release = debug_close,
346 };
347 static const struct file_operations debug_registers_fops = {
348 .owner = THIS_MODULE,
349 .open = debug_registers_open,
350 .read = debug_output,
351 .release = debug_close,
352 };
353
354 static struct dentry *ehci_debug_root;
355
356 struct debug_buffer {
357 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
358 struct usb_bus *bus;
359 struct mutex mutex; /* protect filling of buffer */
360 size_t count; /* number of characters filled into buffer */
361 char *page;
362 };
363
364 #define speed_char(info1) ({ char tmp; \
365 switch (info1 & (3 << 12)) { \
366 case 0 << 12: tmp = 'f'; break; \
367 case 1 << 12: tmp = 'l'; break; \
368 case 2 << 12: tmp = 'h'; break; \
369 default: tmp = '?'; break; \
370 }; tmp; })
371
372 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
373 {
374 __u32 v = hc32_to_cpu(ehci, token);
375
376 if (v & QTD_STS_ACTIVE)
377 return '*';
378 if (v & QTD_STS_HALT)
379 return '-';
380 if (!IS_SHORT_READ (v))
381 return ' ';
382 /* tries to advance through hw_alt_next */
383 return '/';
384 }
385
386 static void qh_lines (
387 struct ehci_hcd *ehci,
388 struct ehci_qh *qh,
389 char **nextp,
390 unsigned *sizep
391 )
392 {
393 u32 scratch;
394 u32 hw_curr;
395 struct list_head *entry;
396 struct ehci_qtd *td;
397 unsigned temp;
398 unsigned size = *sizep;
399 char *next = *nextp;
400 char mark;
401 u32 list_end = EHCI_LIST_END(ehci);
402
403 if (qh->hw_qtd_next == list_end) /* NEC does this */
404 mark = '@';
405 else
406 mark = token_mark(ehci, qh->hw_token);
407 if (mark == '/') { /* qh_alt_next controls qh advance? */
408 if ((qh->hw_alt_next & QTD_MASK(ehci))
409 == ehci->async->hw_alt_next)
410 mark = '#'; /* blocked */
411 else if (qh->hw_alt_next == list_end)
412 mark = '.'; /* use hw_qtd_next */
413 /* else alt_next points to some other qtd */
414 }
415 scratch = hc32_to_cpup(ehci, &qh->hw_info1);
416 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &qh->hw_current) : 0;
417 temp = scnprintf (next, size,
418 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
419 qh, scratch & 0x007f,
420 speed_char (scratch),
421 (scratch >> 8) & 0x000f,
422 scratch, hc32_to_cpup(ehci, &qh->hw_info2),
423 hc32_to_cpup(ehci, &qh->hw_token), mark,
424 (cpu_to_hc32(ehci, QTD_TOGGLE) & qh->hw_token)
425 ? "data1" : "data0",
426 (hc32_to_cpup(ehci, &qh->hw_alt_next) >> 1) & 0x0f);
427 size -= temp;
428 next += temp;
429
430 /* hc may be modifying the list as we read it ... */
431 list_for_each (entry, &qh->qtd_list) {
432 td = list_entry (entry, struct ehci_qtd, qtd_list);
433 scratch = hc32_to_cpup(ehci, &td->hw_token);
434 mark = ' ';
435 if (hw_curr == td->qtd_dma)
436 mark = '*';
437 else if (qh->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
438 mark = '+';
439 else if (QTD_LENGTH (scratch)) {
440 if (td->hw_alt_next == ehci->async->hw_alt_next)
441 mark = '#';
442 else if (td->hw_alt_next != list_end)
443 mark = '/';
444 }
445 temp = snprintf (next, size,
446 "\n\t%p%c%s len=%d %08x urb %p",
447 td, mark, ({ char *tmp;
448 switch ((scratch>>8)&0x03) {
449 case 0: tmp = "out"; break;
450 case 1: tmp = "in"; break;
451 case 2: tmp = "setup"; break;
452 default: tmp = "?"; break;
453 } tmp;}),
454 (scratch >> 16) & 0x7fff,
455 scratch,
456 td->urb);
457 if (temp < 0)
458 temp = 0;
459 else if (size < temp)
460 temp = size;
461 size -= temp;
462 next += temp;
463 if (temp == size)
464 goto done;
465 }
466
467 temp = snprintf (next, size, "\n");
468 if (temp < 0)
469 temp = 0;
470 else if (size < temp)
471 temp = size;
472 size -= temp;
473 next += temp;
474
475 done:
476 *sizep = size;
477 *nextp = next;
478 }
479
480 static ssize_t fill_async_buffer(struct debug_buffer *buf)
481 {
482 struct usb_hcd *hcd;
483 struct ehci_hcd *ehci;
484 unsigned long flags;
485 unsigned temp, size;
486 char *next;
487 struct ehci_qh *qh;
488
489 hcd = bus_to_hcd(buf->bus);
490 ehci = hcd_to_ehci (hcd);
491 next = buf->page;
492 size = PAGE_SIZE;
493
494 *next = 0;
495
496 /* dumps a snapshot of the async schedule.
497 * usually empty except for long-term bulk reads, or head.
498 * one QH per line, and TDs we know about
499 */
500 spin_lock_irqsave (&ehci->lock, flags);
501 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
502 qh_lines (ehci, qh, &next, &size);
503 if (ehci->reclaim && size > 0) {
504 temp = scnprintf (next, size, "\nreclaim =\n");
505 size -= temp;
506 next += temp;
507
508 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
509 qh_lines (ehci, qh, &next, &size);
510 }
511 spin_unlock_irqrestore (&ehci->lock, flags);
512
513 return strlen(buf->page);
514 }
515
516 #define DBG_SCHED_LIMIT 64
517 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
518 {
519 struct usb_hcd *hcd;
520 struct ehci_hcd *ehci;
521 unsigned long flags;
522 union ehci_shadow p, *seen;
523 unsigned temp, size, seen_count;
524 char *next;
525 unsigned i;
526 __hc32 tag;
527
528 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
529 return 0;
530 seen_count = 0;
531
532 hcd = bus_to_hcd(buf->bus);
533 ehci = hcd_to_ehci (hcd);
534 next = buf->page;
535 size = PAGE_SIZE;
536
537 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
538 size -= temp;
539 next += temp;
540
541 /* dump a snapshot of the periodic schedule.
542 * iso changes, interrupt usually doesn't.
543 */
544 spin_lock_irqsave (&ehci->lock, flags);
545 for (i = 0; i < ehci->periodic_size; i++) {
546 p = ehci->pshadow [i];
547 if (likely (!p.ptr))
548 continue;
549 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
550
551 temp = scnprintf (next, size, "%4d: ", i);
552 size -= temp;
553 next += temp;
554
555 do {
556 switch (hc32_to_cpu(ehci, tag)) {
557 case Q_TYPE_QH:
558 temp = scnprintf (next, size, " qh%d-%04x/%p",
559 p.qh->period,
560 hc32_to_cpup(ehci,
561 &p.qh->hw_info2)
562 /* uframe masks */
563 & (QH_CMASK | QH_SMASK),
564 p.qh);
565 size -= temp;
566 next += temp;
567 /* don't repeat what follows this qh */
568 for (temp = 0; temp < seen_count; temp++) {
569 if (seen [temp].ptr != p.ptr)
570 continue;
571 if (p.qh->qh_next.ptr)
572 temp = scnprintf (next, size,
573 " ...");
574 p.ptr = NULL;
575 break;
576 }
577 /* show more info the first time around */
578 if (temp == seen_count && p.ptr) {
579 u32 scratch = hc32_to_cpup(ehci,
580 &p.qh->hw_info1);
581 struct ehci_qtd *qtd;
582 char *type = "";
583
584 /* count tds, get ep direction */
585 temp = 0;
586 list_for_each_entry (qtd,
587 &p.qh->qtd_list,
588 qtd_list) {
589 temp++;
590 switch (0x03 & (hc32_to_cpu(
591 ehci,
592 qtd->hw_token) >> 8)) {
593 case 0: type = "out"; continue;
594 case 1: type = "in"; continue;
595 }
596 }
597
598 temp = scnprintf (next, size,
599 " (%c%d ep%d%s "
600 "[%d/%d] q%d p%d)",
601 speed_char (scratch),
602 scratch & 0x007f,
603 (scratch >> 8) & 0x000f, type,
604 p.qh->usecs, p.qh->c_usecs,
605 temp,
606 0x7ff & (scratch >> 16));
607
608 if (seen_count < DBG_SCHED_LIMIT)
609 seen [seen_count++].qh = p.qh;
610 } else
611 temp = 0;
612 if (p.qh) {
613 tag = Q_NEXT_TYPE(ehci, p.qh->hw_next);
614 p = p.qh->qh_next;
615 }
616 break;
617 case Q_TYPE_FSTN:
618 temp = scnprintf (next, size,
619 " fstn-%8x/%p", p.fstn->hw_prev,
620 p.fstn);
621 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
622 p = p.fstn->fstn_next;
623 break;
624 case Q_TYPE_ITD:
625 temp = scnprintf (next, size,
626 " itd/%p", p.itd);
627 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
628 p = p.itd->itd_next;
629 break;
630 case Q_TYPE_SITD:
631 temp = scnprintf (next, size,
632 " sitd%d-%04x/%p",
633 p.sitd->stream->interval,
634 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
635 & 0x0000ffff,
636 p.sitd);
637 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
638 p = p.sitd->sitd_next;
639 break;
640 }
641 size -= temp;
642 next += temp;
643 } while (p.ptr);
644
645 temp = scnprintf (next, size, "\n");
646 size -= temp;
647 next += temp;
648 }
649 spin_unlock_irqrestore (&ehci->lock, flags);
650 kfree (seen);
651
652 return PAGE_SIZE - size;
653 }
654 #undef DBG_SCHED_LIMIT
655
656 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
657 {
658 struct usb_hcd *hcd;
659 struct ehci_hcd *ehci;
660 unsigned long flags;
661 unsigned temp, size, i;
662 char *next, scratch [80];
663 static char fmt [] = "%*s\n";
664 static char label [] = "";
665
666 hcd = bus_to_hcd(buf->bus);
667 ehci = hcd_to_ehci (hcd);
668 next = buf->page;
669 size = PAGE_SIZE;
670
671 spin_lock_irqsave (&ehci->lock, flags);
672
673 if (buf->bus->controller->power.power_state.event) {
674 size = scnprintf (next, size,
675 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
676 "%s\n"
677 "SUSPENDED (no register access)\n",
678 hcd->self.controller->bus->name,
679 hcd->self.controller->bus_id,
680 hcd->product_desc);
681 goto done;
682 }
683
684 /* Capability Registers */
685 i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
686 temp = scnprintf (next, size,
687 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
688 "%s\n"
689 "EHCI %x.%02x, hcd state %d\n",
690 hcd->self.controller->bus->name,
691 hcd->self.controller->bus_id,
692 hcd->product_desc,
693 i >> 8, i & 0x0ff, hcd->state);
694 size -= temp;
695 next += temp;
696
697 #ifdef CONFIG_PCI
698 /* EHCI 0.96 and later may have "extended capabilities" */
699 if (hcd->self.controller->bus == &pci_bus_type) {
700 struct pci_dev *pdev;
701 u32 offset, cap, cap2;
702 unsigned count = 256/4;
703
704 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
705 offset = HCC_EXT_CAPS(ehci_readl(ehci,
706 &ehci->caps->hcc_params));
707 while (offset && count--) {
708 pci_read_config_dword (pdev, offset, &cap);
709 switch (cap & 0xff) {
710 case 1:
711 temp = scnprintf (next, size,
712 "ownership %08x%s%s\n", cap,
713 (cap & (1 << 24)) ? " linux" : "",
714 (cap & (1 << 16)) ? " firmware" : "");
715 size -= temp;
716 next += temp;
717
718 offset += 4;
719 pci_read_config_dword (pdev, offset, &cap2);
720 temp = scnprintf (next, size,
721 "SMI sts/enable 0x%08x\n", cap2);
722 size -= temp;
723 next += temp;
724 break;
725 case 0: /* illegal reserved capability */
726 cap = 0;
727 /* FALLTHROUGH */
728 default: /* unknown */
729 break;
730 }
731 temp = (cap >> 8) & 0xff;
732 }
733 }
734 #endif
735
736 // FIXME interpret both types of params
737 i = ehci_readl(ehci, &ehci->caps->hcs_params);
738 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
739 size -= temp;
740 next += temp;
741
742 i = ehci_readl(ehci, &ehci->caps->hcc_params);
743 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
744 size -= temp;
745 next += temp;
746
747 /* Operational Registers */
748 temp = dbg_status_buf (scratch, sizeof scratch, label,
749 ehci_readl(ehci, &ehci->regs->status));
750 temp = scnprintf (next, size, fmt, temp, scratch);
751 size -= temp;
752 next += temp;
753
754 temp = dbg_command_buf (scratch, sizeof scratch, label,
755 ehci_readl(ehci, &ehci->regs->command));
756 temp = scnprintf (next, size, fmt, temp, scratch);
757 size -= temp;
758 next += temp;
759
760 temp = dbg_intr_buf (scratch, sizeof scratch, label,
761 ehci_readl(ehci, &ehci->regs->intr_enable));
762 temp = scnprintf (next, size, fmt, temp, scratch);
763 size -= temp;
764 next += temp;
765
766 temp = scnprintf (next, size, "uframe %04x\n",
767 ehci_readl(ehci, &ehci->regs->frame_index));
768 size -= temp;
769 next += temp;
770
771 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
772 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
773 ehci_readl(ehci,
774 &ehci->regs->port_status[i - 1]));
775 temp = scnprintf (next, size, fmt, temp, scratch);
776 size -= temp;
777 next += temp;
778 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
779 temp = scnprintf (next, size,
780 " debug control %08x\n",
781 ehci_readl(ehci,
782 &ehci->debug->control));
783 size -= temp;
784 next += temp;
785 }
786 }
787
788 if (ehci->reclaim) {
789 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
790 size -= temp;
791 next += temp;
792 }
793
794 #ifdef EHCI_STATS
795 temp = scnprintf (next, size,
796 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
797 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
798 ehci->stats.lost_iaa);
799 size -= temp;
800 next += temp;
801
802 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
803 ehci->stats.complete, ehci->stats.unlink);
804 size -= temp;
805 next += temp;
806 #endif
807
808 done:
809 spin_unlock_irqrestore (&ehci->lock, flags);
810
811 return PAGE_SIZE - size;
812 }
813
814 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
815 ssize_t (*fill_func)(struct debug_buffer *))
816 {
817 struct debug_buffer *buf;
818
819 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
820
821 if (buf) {
822 buf->bus = bus;
823 buf->fill_func = fill_func;
824 mutex_init(&buf->mutex);
825 }
826
827 return buf;
828 }
829
830 static int fill_buffer(struct debug_buffer *buf)
831 {
832 int ret = 0;
833
834 if (!buf->page)
835 buf->page = (char *)get_zeroed_page(GFP_KERNEL);
836
837 if (!buf->page) {
838 ret = -ENOMEM;
839 goto out;
840 }
841
842 ret = buf->fill_func(buf);
843
844 if (ret >= 0) {
845 buf->count = ret;
846 ret = 0;
847 }
848
849 out:
850 return ret;
851 }
852
853 static ssize_t debug_output(struct file *file, char __user *user_buf,
854 size_t len, loff_t *offset)
855 {
856 struct debug_buffer *buf = file->private_data;
857 int ret = 0;
858
859 mutex_lock(&buf->mutex);
860 if (buf->count == 0) {
861 ret = fill_buffer(buf);
862 if (ret != 0) {
863 mutex_unlock(&buf->mutex);
864 goto out;
865 }
866 }
867 mutex_unlock(&buf->mutex);
868
869 ret = simple_read_from_buffer(user_buf, len, offset,
870 buf->page, buf->count);
871
872 out:
873 return ret;
874
875 }
876
877 static int debug_close(struct inode *inode, struct file *file)
878 {
879 struct debug_buffer *buf = file->private_data;
880
881 if (buf) {
882 if (buf->page)
883 free_page((unsigned long)buf->page);
884 kfree(buf);
885 }
886
887 return 0;
888 }
889 static int debug_async_open(struct inode *inode, struct file *file)
890 {
891 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
892
893 return file->private_data ? 0 : -ENOMEM;
894 }
895
896 static int debug_periodic_open(struct inode *inode, struct file *file)
897 {
898 file->private_data = alloc_buffer(inode->i_private,
899 fill_periodic_buffer);
900
901 return file->private_data ? 0 : -ENOMEM;
902 }
903
904 static int debug_registers_open(struct inode *inode, struct file *file)
905 {
906 file->private_data = alloc_buffer(inode->i_private,
907 fill_registers_buffer);
908
909 return file->private_data ? 0 : -ENOMEM;
910 }
911
912 static inline void create_debug_files (struct ehci_hcd *ehci)
913 {
914 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
915
916 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
917 if (!ehci->debug_dir)
918 goto dir_error;
919
920 ehci->debug_async = debugfs_create_file("async", S_IRUGO,
921 ehci->debug_dir, bus,
922 &debug_async_fops);
923 if (!ehci->debug_async)
924 goto async_error;
925
926 ehci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
927 ehci->debug_dir, bus,
928 &debug_periodic_fops);
929 if (!ehci->debug_periodic)
930 goto periodic_error;
931
932 ehci->debug_registers = debugfs_create_file("registers", S_IRUGO,
933 ehci->debug_dir, bus,
934 &debug_registers_fops);
935 if (!ehci->debug_registers)
936 goto registers_error;
937 return;
938
939 registers_error:
940 debugfs_remove(ehci->debug_periodic);
941 periodic_error:
942 debugfs_remove(ehci->debug_async);
943 async_error:
944 debugfs_remove(ehci->debug_dir);
945 dir_error:
946 ehci->debug_periodic = NULL;
947 ehci->debug_async = NULL;
948 ehci->debug_dir = NULL;
949 }
950
951 static inline void remove_debug_files (struct ehci_hcd *ehci)
952 {
953 debugfs_remove(ehci->debug_registers);
954 debugfs_remove(ehci->debug_periodic);
955 debugfs_remove(ehci->debug_async);
956 debugfs_remove(ehci->debug_dir);
957 }
958
959 #endif /* STUB_DEBUG_FILES */
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