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[PATCH] USB: ehci: microframe handling fix
[linux-2.6.git] / drivers / usb / host / ehci-dbg.c
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 = readl (&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 = readl (&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 __attribute__((__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                 le32_to_cpup (&qtd->hw_next),
123                 le32_to_cpup (&qtd->hw_alt_next),
124                 le32_to_cpup (&qtd->hw_token),
125                 le32_to_cpup (&qtd->hw_buf [0]));
126         if (qtd->hw_buf [1])
127                 ehci_dbg (ehci, "  p1=%08x p2=%08x p3=%08x p4=%08x\n",
128                         le32_to_cpup (&qtd->hw_buf [1]),
129                         le32_to_cpup (&qtd->hw_buf [2]),
130                         le32_to_cpup (&qtd->hw_buf [3]),
131                         le32_to_cpup (&qtd->hw_buf [4]));
132 }
133
134 static void __attribute__((__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 __attribute__((__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, le32_to_cpu(itd->hw_next), itd->urb);
148         ehci_dbg (ehci,
149                 "  trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", 
150                 le32_to_cpu(itd->hw_transaction[0]),
151                 le32_to_cpu(itd->hw_transaction[1]),
152                 le32_to_cpu(itd->hw_transaction[2]),
153                 le32_to_cpu(itd->hw_transaction[3]),
154                 le32_to_cpu(itd->hw_transaction[4]),
155                 le32_to_cpu(itd->hw_transaction[5]),
156                 le32_to_cpu(itd->hw_transaction[6]),
157                 le32_to_cpu(itd->hw_transaction[7]));
158         ehci_dbg (ehci,
159                 "  buf:   %08x %08x %08x %08x %08x %08x %08x\n", 
160                 le32_to_cpu(itd->hw_bufp[0]),
161                 le32_to_cpu(itd->hw_bufp[1]),
162                 le32_to_cpu(itd->hw_bufp[2]),
163                 le32_to_cpu(itd->hw_bufp[3]),
164                 le32_to_cpu(itd->hw_bufp[4]),
165                 le32_to_cpu(itd->hw_bufp[5]),
166                 le32_to_cpu(itd->hw_bufp[6]));
167         ehci_dbg (ehci, "  index: %d %d %d %d %d %d %d %d\n",
168                 itd->index[0], itd->index[1], itd->index[2],
169                 itd->index[3], itd->index[4], itd->index[5],
170                 itd->index[6], itd->index[7]);
171 }
172
173 static void __attribute__((__unused__))
174 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) 
175 {
176         ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
177                 label, sitd->frame, sitd, le32_to_cpu(sitd->hw_next), sitd->urb);
178         ehci_dbg (ehci,
179                 "  addr %08x sched %04x result %08x buf %08x %08x\n", 
180                 le32_to_cpu(sitd->hw_fullspeed_ep),
181                 le32_to_cpu(sitd->hw_uframe),
182                 le32_to_cpu(sitd->hw_results),
183                 le32_to_cpu(sitd->hw_buf [0]),
184                 le32_to_cpu(sitd->hw_buf [1]));
185 }
186
187 static int __attribute__((__unused__))
188 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
189 {
190         return scnprintf (buf, len,
191                 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
192                 label, label [0] ? " " : "", status,
193                 (status & STS_ASS) ? " Async" : "",
194                 (status & STS_PSS) ? " Periodic" : "",
195                 (status & STS_RECL) ? " Recl" : "",
196                 (status & STS_HALT) ? " Halt" : "",
197                 (status & STS_IAA) ? " IAA" : "",
198                 (status & STS_FATAL) ? " FATAL" : "",
199                 (status & STS_FLR) ? " FLR" : "",
200                 (status & STS_PCD) ? " PCD" : "",
201                 (status & STS_ERR) ? " ERR" : "",
202                 (status & STS_INT) ? " INT" : ""
203                 );
204 }
205
206 static int __attribute__((__unused__))
207 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
208 {
209         return scnprintf (buf, len,
210                 "%s%sintrenable %02x%s%s%s%s%s%s",
211                 label, label [0] ? " " : "", enable,
212                 (enable & STS_IAA) ? " IAA" : "",
213                 (enable & STS_FATAL) ? " FATAL" : "",
214                 (enable & STS_FLR) ? " FLR" : "",
215                 (enable & STS_PCD) ? " PCD" : "",
216                 (enable & STS_ERR) ? " ERR" : "",
217                 (enable & STS_INT) ? " INT" : ""
218                 );
219 }
220
221 static const char *const fls_strings [] =
222     { "1024", "512", "256", "??" };
223
224 static int
225 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
226 {
227         return scnprintf (buf, len,
228                 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
229                 label, label [0] ? " " : "", command,
230                 (command & CMD_PARK) ? "park" : "(park)",
231                 CMD_PARK_CNT (command),
232                 (command >> 16) & 0x3f,
233                 (command & CMD_LRESET) ? " LReset" : "",
234                 (command & CMD_IAAD) ? " IAAD" : "",
235                 (command & CMD_ASE) ? " Async" : "",
236                 (command & CMD_PSE) ? " Periodic" : "",
237                 fls_strings [(command >> 2) & 0x3],
238                 (command & CMD_RESET) ? " Reset" : "",
239                 (command & CMD_RUN) ? "RUN" : "HALT"
240                 );
241 }
242
243 static int
244 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
245 {
246         char    *sig;
247
248         /* signaling state */
249         switch (status & (3 << 10)) {
250         case 0 << 10: sig = "se0"; break;
251         case 1 << 10: sig = "k"; break;         /* low speed */
252         case 2 << 10: sig = "j"; break;
253         default: sig = "?"; break;
254         }
255
256         return scnprintf (buf, len,
257                 "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s",
258                 label, label [0] ? " " : "", port, status,
259                 (status & PORT_POWER) ? " POWER" : "",
260                 (status & PORT_OWNER) ? " OWNER" : "",
261                 sig,
262                 (status & PORT_RESET) ? " RESET" : "",
263                 (status & PORT_SUSPEND) ? " SUSPEND" : "",
264                 (status & PORT_RESUME) ? " RESUME" : "",
265                 (status & PORT_OCC) ? " OCC" : "",
266                 (status & PORT_OC) ? " OC" : "",
267                 (status & PORT_PEC) ? " PEC" : "",
268                 (status & PORT_PE) ? " PE" : "",
269                 (status & PORT_CSC) ? " CSC" : "",
270                 (status & PORT_CONNECT) ? " CONNECT" : ""
271             );
272 }
273
274 #else
275 static inline void __attribute__((__unused__))
276 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
277 {}
278
279 static inline int __attribute__((__unused__))
280 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
281 { return 0; }
282
283 static inline int __attribute__((__unused__))
284 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
285 { return 0; }
286
287 static inline int __attribute__((__unused__))
288 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
289 { return 0; }
290
291 static inline int __attribute__((__unused__))
292 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
293 { return 0; }
294
295 #endif  /* DEBUG */
296
297 /* functions have the "wrong" filename when they're output... */
298 #define dbg_status(ehci, label, status) { \
299         char _buf [80]; \
300         dbg_status_buf (_buf, sizeof _buf, label, status); \
301         ehci_dbg (ehci, "%s\n", _buf); \
302 }
303
304 #define dbg_cmd(ehci, label, command) { \
305         char _buf [80]; \
306         dbg_command_buf (_buf, sizeof _buf, label, command); \
307         ehci_dbg (ehci, "%s\n", _buf); \
308 }
309
310 #define dbg_port(ehci, label, port, status) { \
311         char _buf [80]; \
312         dbg_port_buf (_buf, sizeof _buf, label, port, status); \
313         ehci_dbg (ehci, "%s\n", _buf); \
314 }
315
316 /*-------------------------------------------------------------------------*/
317
318 #ifdef STUB_DEBUG_FILES
319
320 static inline void create_debug_files (struct ehci_hcd *bus) { }
321 static inline void remove_debug_files (struct ehci_hcd *bus) { }
322
323 #else
324
325 /* troubleshooting help: expose state in driverfs */
326
327 #define speed_char(info1) ({ char tmp; \
328                 switch (info1 & (3 << 12)) { \
329                 case 0 << 12: tmp = 'f'; break; \
330                 case 1 << 12: tmp = 'l'; break; \
331                 case 2 << 12: tmp = 'h'; break; \
332                 default: tmp = '?'; break; \
333                 }; tmp; })
334
335 static inline char token_mark (__le32 token)
336 {
337         __u32 v = le32_to_cpu (token);
338         if (v & QTD_STS_ACTIVE)
339                 return '*';
340         if (v & QTD_STS_HALT)
341                 return '-';
342         if (!IS_SHORT_READ (v))
343                 return ' ';
344         /* tries to advance through hw_alt_next */
345         return '/';
346 }
347
348 static void qh_lines (
349         struct ehci_hcd *ehci,
350         struct ehci_qh *qh,
351         char **nextp,
352         unsigned *sizep
353 )
354 {
355         u32                     scratch;
356         u32                     hw_curr;
357         struct list_head        *entry;
358         struct ehci_qtd         *td;
359         unsigned                temp;
360         unsigned                size = *sizep;
361         char                    *next = *nextp;
362         char                    mark;
363
364         if (qh->hw_qtd_next == EHCI_LIST_END)   /* NEC does this */
365                 mark = '@';
366         else
367                 mark = token_mark (qh->hw_token);
368         if (mark == '/') {      /* qh_alt_next controls qh advance? */
369                 if ((qh->hw_alt_next & QTD_MASK) == ehci->async->hw_alt_next)
370                         mark = '#';     /* blocked */
371                 else if (qh->hw_alt_next == EHCI_LIST_END)
372                         mark = '.';     /* use hw_qtd_next */
373                 /* else alt_next points to some other qtd */
374         }
375         scratch = le32_to_cpup (&qh->hw_info1);
376         hw_curr = (mark == '*') ? le32_to_cpup (&qh->hw_current) : 0;
377         temp = scnprintf (next, size,
378                         "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
379                         qh, scratch & 0x007f,
380                         speed_char (scratch),
381                         (scratch >> 8) & 0x000f,
382                         scratch, le32_to_cpup (&qh->hw_info2),
383                         le32_to_cpup (&qh->hw_token), mark,
384                         (__constant_cpu_to_le32 (QTD_TOGGLE) & qh->hw_token)
385                                 ? "data1" : "data0",
386                         (le32_to_cpup (&qh->hw_alt_next) >> 1) & 0x0f);
387         size -= temp;
388         next += temp;
389
390         /* hc may be modifying the list as we read it ... */
391         list_for_each (entry, &qh->qtd_list) {
392                 td = list_entry (entry, struct ehci_qtd, qtd_list);
393                 scratch = le32_to_cpup (&td->hw_token);
394                 mark = ' ';
395                 if (hw_curr == td->qtd_dma)
396                         mark = '*';
397                 else if (qh->hw_qtd_next == cpu_to_le32(td->qtd_dma))
398                         mark = '+';
399                 else if (QTD_LENGTH (scratch)) {
400                         if (td->hw_alt_next == ehci->async->hw_alt_next)
401                                 mark = '#';
402                         else if (td->hw_alt_next != EHCI_LIST_END)
403                                 mark = '/';
404                 }
405                 temp = snprintf (next, size,
406                                 "\n\t%p%c%s len=%d %08x urb %p",
407                                 td, mark, ({ char *tmp;
408                                  switch ((scratch>>8)&0x03) {
409                                  case 0: tmp = "out"; break;
410                                  case 1: tmp = "in"; break;
411                                  case 2: tmp = "setup"; break;
412                                  default: tmp = "?"; break;
413                                  } tmp;}),
414                                 (scratch >> 16) & 0x7fff,
415                                 scratch,
416                                 td->urb);
417                 if (temp < 0)
418                         temp = 0;
419                 else if (size < temp)
420                         temp = size;
421                 size -= temp;
422                 next += temp;
423                 if (temp == size)
424                         goto done;
425         }
426
427         temp = snprintf (next, size, "\n");
428         if (temp < 0)
429                 temp = 0;
430         else if (size < temp)
431                 temp = size;
432         size -= temp;
433         next += temp;
434
435 done:
436         *sizep = size;
437         *nextp = next;
438 }
439
440 static ssize_t
441 show_async (struct class_device *class_dev, char *buf)
442 {
443         struct usb_bus          *bus;
444         struct usb_hcd          *hcd;
445         struct ehci_hcd         *ehci;
446         unsigned long           flags;
447         unsigned                temp, size;
448         char                    *next;
449         struct ehci_qh          *qh;
450
451         *buf = 0;
452
453         bus = class_get_devdata(class_dev);
454         hcd = bus->hcpriv;
455         ehci = hcd_to_ehci (hcd);
456         next = buf;
457         size = PAGE_SIZE;
458
459         /* dumps a snapshot of the async schedule.
460          * usually empty except for long-term bulk reads, or head.
461          * one QH per line, and TDs we know about
462          */
463         spin_lock_irqsave (&ehci->lock, flags);
464         for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
465                 qh_lines (ehci, qh, &next, &size);
466         if (ehci->reclaim && size > 0) {
467                 temp = scnprintf (next, size, "\nreclaim =\n");
468                 size -= temp;
469                 next += temp;
470
471                 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
472                         qh_lines (ehci, qh, &next, &size);
473         }
474         spin_unlock_irqrestore (&ehci->lock, flags);
475
476         return strlen (buf);
477 }
478 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
479
480 #define DBG_SCHED_LIMIT 64
481
482 static ssize_t
483 show_periodic (struct class_device *class_dev, char *buf)
484 {
485         struct usb_bus          *bus;
486         struct usb_hcd          *hcd;
487         struct ehci_hcd         *ehci;
488         unsigned long           flags;
489         union ehci_shadow       p, *seen;
490         unsigned                temp, size, seen_count;
491         char                    *next;
492         unsigned                i;
493         __le32                  tag;
494
495         if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, SLAB_ATOMIC)))
496                 return 0;
497         seen_count = 0;
498
499         bus = class_get_devdata(class_dev);
500         hcd = bus->hcpriv;
501         ehci = hcd_to_ehci (hcd);
502         next = buf;
503         size = PAGE_SIZE;
504
505         temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
506         size -= temp;
507         next += temp;
508
509         /* dump a snapshot of the periodic schedule.
510          * iso changes, interrupt usually doesn't.
511          */
512         spin_lock_irqsave (&ehci->lock, flags);
513         for (i = 0; i < ehci->periodic_size; i++) {
514                 p = ehci->pshadow [i];
515                 if (likely (!p.ptr))
516                         continue;
517                 tag = Q_NEXT_TYPE (ehci->periodic [i]);
518
519                 temp = scnprintf (next, size, "%4d: ", i);
520                 size -= temp;
521                 next += temp;
522
523                 do {
524                         switch (tag) {
525                         case Q_TYPE_QH:
526                                 temp = scnprintf (next, size, " qh%d-%04x/%p",
527                                                 p.qh->period,
528                                                 le32_to_cpup (&p.qh->hw_info2)
529                                                         /* uframe masks */
530                                                         & (QH_CMASK | QH_SMASK),
531                                                 p.qh);
532                                 size -= temp;
533                                 next += temp;
534                                 /* don't repeat what follows this qh */
535                                 for (temp = 0; temp < seen_count; temp++) {
536                                         if (seen [temp].ptr != p.ptr)
537                                                 continue;
538                                         if (p.qh->qh_next.ptr)
539                                                 temp = scnprintf (next, size,
540                                                         " ...");
541                                         p.ptr = NULL;
542                                         break;
543                                 }
544                                 /* show more info the first time around */
545                                 if (temp == seen_count && p.ptr) {
546                                         u32     scratch = le32_to_cpup (
547                                                         &p.qh->hw_info1);
548                                         struct ehci_qtd *qtd;
549                                         char            *type = "";
550
551                                         /* count tds, get ep direction */
552                                         temp = 0;
553                                         list_for_each_entry (qtd,
554                                                         &p.qh->qtd_list,
555                                                         qtd_list) {
556                                                 temp++;
557                                                 switch (0x03 & (le32_to_cpu (
558                                                         qtd->hw_token) >> 8)) {
559                                                 case 0: type = "out"; continue;
560                                                 case 1: type = "in"; continue;
561                                                 }
562                                         }
563
564                                         temp = scnprintf (next, size,
565                                                 " (%c%d ep%d%s "
566                                                 "[%d/%d] q%d p%d)",
567                                                 speed_char (scratch),
568                                                 scratch & 0x007f,
569                                                 (scratch >> 8) & 0x000f, type,
570                                                 p.qh->usecs, p.qh->c_usecs,
571                                                 temp,
572                                                 0x7ff & (scratch >> 16));
573
574                                         if (seen_count < DBG_SCHED_LIMIT)
575                                                 seen [seen_count++].qh = p.qh;
576                                 } else
577                                         temp = 0;
578                                 if (p.qh) {
579                                         tag = Q_NEXT_TYPE (p.qh->hw_next);
580                                         p = p.qh->qh_next;
581                                 }
582                                 break;
583                         case Q_TYPE_FSTN:
584                                 temp = scnprintf (next, size,
585                                         " fstn-%8x/%p", p.fstn->hw_prev,
586                                         p.fstn);
587                                 tag = Q_NEXT_TYPE (p.fstn->hw_next);
588                                 p = p.fstn->fstn_next;
589                                 break;
590                         case Q_TYPE_ITD:
591                                 temp = scnprintf (next, size,
592                                         " itd/%p", p.itd);
593                                 tag = Q_NEXT_TYPE (p.itd->hw_next);
594                                 p = p.itd->itd_next;
595                                 break;
596                         case Q_TYPE_SITD:
597                                 temp = scnprintf (next, size,
598                                         " sitd%d-%04x/%p",
599                                         p.sitd->stream->interval,
600                                         le32_to_cpup (&p.sitd->hw_uframe)
601                                                 & 0x0000ffff,
602                                         p.sitd);
603                                 tag = Q_NEXT_TYPE (p.sitd->hw_next);
604                                 p = p.sitd->sitd_next;
605                                 break;
606                         }
607                         size -= temp;
608                         next += temp;
609                 } while (p.ptr);
610
611                 temp = scnprintf (next, size, "\n");
612                 size -= temp;
613                 next += temp;
614         }
615         spin_unlock_irqrestore (&ehci->lock, flags);
616         kfree (seen);
617
618         return PAGE_SIZE - size;
619 }
620 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
621
622 #undef DBG_SCHED_LIMIT
623
624 static ssize_t
625 show_registers (struct class_device *class_dev, char *buf)
626 {
627         struct usb_bus          *bus;
628         struct usb_hcd          *hcd;
629         struct ehci_hcd         *ehci;
630         unsigned long           flags;
631         unsigned                temp, size, i;
632         char                    *next, scratch [80];
633         static char             fmt [] = "%*s\n";
634         static char             label [] = "";
635
636         bus = class_get_devdata(class_dev);
637         hcd = bus->hcpriv;
638         ehci = hcd_to_ehci (hcd);
639         next = buf;
640         size = PAGE_SIZE;
641
642         spin_lock_irqsave (&ehci->lock, flags);
643
644         if (bus->controller->power.power_state) {
645                 size = scnprintf (next, size,
646                         "bus %s, device %s (driver " DRIVER_VERSION ")\n"
647                         "%s\n"
648                         "SUSPENDED (no register access)\n",
649                         hcd->self.controller->bus->name,
650                         hcd->self.controller->bus_id,
651                         hcd->product_desc);
652                 goto done;
653         }
654
655         /* Capability Registers */
656         i = HC_VERSION(readl (&ehci->caps->hc_capbase));
657         temp = scnprintf (next, size,
658                 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
659                 "%s\n"
660                 "EHCI %x.%02x, hcd state %d\n",
661                 hcd->self.controller->bus->name,
662                 hcd->self.controller->bus_id,
663                 hcd->product_desc,
664                 i >> 8, i & 0x0ff, hcd->state);
665         size -= temp;
666         next += temp;
667
668 #ifdef  CONFIG_PCI
669         /* EHCI 0.96 and later may have "extended capabilities" */
670         if (hcd->self.controller->bus == &pci_bus_type) {
671                 struct pci_dev  *pdev;
672                 u32             offset, cap, cap2;
673                 unsigned        count = 256/4;
674
675                 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
676                 offset = HCC_EXT_CAPS (readl (&ehci->caps->hcc_params));
677                 while (offset && count--) {
678                         pci_read_config_dword (pdev, offset, &cap);
679                         switch (cap & 0xff) {
680                         case 1:
681                                 temp = scnprintf (next, size,
682                                         "ownership %08x%s%s\n", cap,
683                                         (cap & (1 << 24)) ? " linux" : "",
684                                         (cap & (1 << 16)) ? " firmware" : "");
685                                 size -= temp;
686                                 next += temp;
687
688                                 offset += 4;
689                                 pci_read_config_dword (pdev, offset, &cap2);
690                                 temp = scnprintf (next, size,
691                                         "SMI sts/enable 0x%08x\n", cap2);
692                                 size -= temp;
693                                 next += temp;
694                                 break;
695                         case 0:         /* illegal reserved capability */
696                                 cap = 0;
697                                 /* FALLTHROUGH */
698                         default:                /* unknown */
699                                 break;
700                         }
701                         temp = (cap >> 8) & 0xff;
702                 }
703         }
704 #endif
705
706         // FIXME interpret both types of params
707         i = readl (&ehci->caps->hcs_params);
708         temp = scnprintf (next, size, "structural params 0x%08x\n", i);
709         size -= temp;
710         next += temp;
711
712         i = readl (&ehci->caps->hcc_params);
713         temp = scnprintf (next, size, "capability params 0x%08x\n", i);
714         size -= temp;
715         next += temp;
716
717         /* Operational Registers */
718         temp = dbg_status_buf (scratch, sizeof scratch, label,
719                         readl (&ehci->regs->status));
720         temp = scnprintf (next, size, fmt, temp, scratch);
721         size -= temp;
722         next += temp;
723
724         temp = dbg_command_buf (scratch, sizeof scratch, label,
725                         readl (&ehci->regs->command));
726         temp = scnprintf (next, size, fmt, temp, scratch);
727         size -= temp;
728         next += temp;
729
730         temp = dbg_intr_buf (scratch, sizeof scratch, label,
731                         readl (&ehci->regs->intr_enable));
732         temp = scnprintf (next, size, fmt, temp, scratch);
733         size -= temp;
734         next += temp;
735
736         temp = scnprintf (next, size, "uframe %04x\n",
737                         readl (&ehci->regs->frame_index));
738         size -= temp;
739         next += temp;
740
741         for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
742                 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
743                                 readl (&ehci->regs->port_status [i - 1]));
744                 temp = scnprintf (next, size, fmt, temp, scratch);
745                 size -= temp;
746                 next += temp;
747                 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
748                         temp = scnprintf (next, size,
749                                         "    debug control %08x\n",
750                                         readl (&ehci->debug->control));
751                         size -= temp;
752                         next += temp;
753                 }
754         }
755
756         if (ehci->reclaim) {
757                 temp = scnprintf (next, size, "reclaim qh %p%s\n",
758                                 ehci->reclaim,
759                                 ehci->reclaim_ready ? " ready" : "");
760                 size -= temp;
761                 next += temp;
762         }
763
764 #ifdef EHCI_STATS
765         temp = scnprintf (next, size,
766                 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
767                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
768                 ehci->stats.lost_iaa);
769         size -= temp;
770         next += temp;
771
772         temp = scnprintf (next, size, "complete %ld unlink %ld\n",
773                 ehci->stats.complete, ehci->stats.unlink);
774         size -= temp;
775         next += temp;
776 #endif
777
778 done:
779         spin_unlock_irqrestore (&ehci->lock, flags);
780
781         return PAGE_SIZE - size;
782 }
783 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
784
785 static inline void create_debug_files (struct ehci_hcd *ehci)
786 {
787         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
788
789         class_device_create_file(cldev, &class_device_attr_async);
790         class_device_create_file(cldev, &class_device_attr_periodic);
791         class_device_create_file(cldev, &class_device_attr_registers);
792 }
793
794 static inline void remove_debug_files (struct ehci_hcd *ehci)
795 {
796         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
797
798         class_device_remove_file(cldev, &class_device_attr_async);
799         class_device_remove_file(cldev, &class_device_attr_periodic);
800         class_device_remove_file(cldev, &class_device_attr_registers);
801 }
802
803 #endif /* STUB_DEBUG_FILES */
804