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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 __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                 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 __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, 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 __attribute__((__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 __attribute__((__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 __attribute__((__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 __attribute__((__unused__))
277 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
278 {}
279
280 static inline int __attribute__((__unused__))
281 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
282 { return 0; }
283
284 static inline int __attribute__((__unused__))
285 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
286 { return 0; }
287
288 static inline int __attribute__((__unused__))
289 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
290 { return 0; }
291
292 static inline int __attribute__((__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 sysfs */
327
328 #define speed_char(info1) ({ char tmp; \
329                 switch (info1 & (3 << 12)) { \
330                 case 0 << 12: tmp = 'f'; break; \
331                 case 1 << 12: tmp = 'l'; break; \
332                 case 2 << 12: tmp = 'h'; break; \
333                 default: tmp = '?'; break; \
334                 }; tmp; })
335
336 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
337 {
338         __u32 v = hc32_to_cpu(ehci, token);
339
340         if (v & QTD_STS_ACTIVE)
341                 return '*';
342         if (v & QTD_STS_HALT)
343                 return '-';
344         if (!IS_SHORT_READ (v))
345                 return ' ';
346         /* tries to advance through hw_alt_next */
347         return '/';
348 }
349
350 static void qh_lines (
351         struct ehci_hcd *ehci,
352         struct ehci_qh *qh,
353         char **nextp,
354         unsigned *sizep
355 )
356 {
357         u32                     scratch;
358         u32                     hw_curr;
359         struct list_head        *entry;
360         struct ehci_qtd         *td;
361         unsigned                temp;
362         unsigned                size = *sizep;
363         char                    *next = *nextp;
364         char                    mark;
365         u32                     list_end = EHCI_LIST_END(ehci);
366
367         if (qh->hw_qtd_next == list_end)        /* NEC does this */
368                 mark = '@';
369         else
370                 mark = token_mark(ehci, qh->hw_token);
371         if (mark == '/') {      /* qh_alt_next controls qh advance? */
372                 if ((qh->hw_alt_next & QTD_MASK(ehci))
373                                 == ehci->async->hw_alt_next)
374                         mark = '#';     /* blocked */
375                 else if (qh->hw_alt_next == list_end)
376                         mark = '.';     /* use hw_qtd_next */
377                 /* else alt_next points to some other qtd */
378         }
379         scratch = hc32_to_cpup(ehci, &qh->hw_info1);
380         hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &qh->hw_current) : 0;
381         temp = scnprintf (next, size,
382                         "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
383                         qh, scratch & 0x007f,
384                         speed_char (scratch),
385                         (scratch >> 8) & 0x000f,
386                         scratch, hc32_to_cpup(ehci, &qh->hw_info2),
387                         hc32_to_cpup(ehci, &qh->hw_token), mark,
388                         (cpu_to_hc32(ehci, QTD_TOGGLE) & qh->hw_token)
389                                 ? "data1" : "data0",
390                         (hc32_to_cpup(ehci, &qh->hw_alt_next) >> 1) & 0x0f);
391         size -= temp;
392         next += temp;
393
394         /* hc may be modifying the list as we read it ... */
395         list_for_each (entry, &qh->qtd_list) {
396                 td = list_entry (entry, struct ehci_qtd, qtd_list);
397                 scratch = hc32_to_cpup(ehci, &td->hw_token);
398                 mark = ' ';
399                 if (hw_curr == td->qtd_dma)
400                         mark = '*';
401                 else if (qh->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
402                         mark = '+';
403                 else if (QTD_LENGTH (scratch)) {
404                         if (td->hw_alt_next == ehci->async->hw_alt_next)
405                                 mark = '#';
406                         else if (td->hw_alt_next != list_end)
407                                 mark = '/';
408                 }
409                 temp = snprintf (next, size,
410                                 "\n\t%p%c%s len=%d %08x urb %p",
411                                 td, mark, ({ char *tmp;
412                                  switch ((scratch>>8)&0x03) {
413                                  case 0: tmp = "out"; break;
414                                  case 1: tmp = "in"; break;
415                                  case 2: tmp = "setup"; break;
416                                  default: tmp = "?"; break;
417                                  } tmp;}),
418                                 (scratch >> 16) & 0x7fff,
419                                 scratch,
420                                 td->urb);
421                 if (temp < 0)
422                         temp = 0;
423                 else if (size < temp)
424                         temp = size;
425                 size -= temp;
426                 next += temp;
427                 if (temp == size)
428                         goto done;
429         }
430
431         temp = snprintf (next, size, "\n");
432         if (temp < 0)
433                 temp = 0;
434         else if (size < temp)
435                 temp = size;
436         size -= temp;
437         next += temp;
438
439 done:
440         *sizep = size;
441         *nextp = next;
442 }
443
444 static ssize_t
445 show_async (struct class_device *class_dev, char *buf)
446 {
447         struct usb_bus          *bus;
448         struct usb_hcd          *hcd;
449         struct ehci_hcd         *ehci;
450         unsigned long           flags;
451         unsigned                temp, size;
452         char                    *next;
453         struct ehci_qh          *qh;
454
455         *buf = 0;
456
457         bus = class_get_devdata(class_dev);
458         hcd = bus_to_hcd(bus);
459         ehci = hcd_to_ehci (hcd);
460         next = buf;
461         size = PAGE_SIZE;
462
463         /* dumps a snapshot of the async schedule.
464          * usually empty except for long-term bulk reads, or head.
465          * one QH per line, and TDs we know about
466          */
467         spin_lock_irqsave (&ehci->lock, flags);
468         for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
469                 qh_lines (ehci, qh, &next, &size);
470         if (ehci->reclaim && size > 0) {
471                 temp = scnprintf (next, size, "\nreclaim =\n");
472                 size -= temp;
473                 next += temp;
474
475                 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
476                         qh_lines (ehci, qh, &next, &size);
477         }
478         spin_unlock_irqrestore (&ehci->lock, flags);
479
480         return strlen (buf);
481 }
482 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
483
484 #define DBG_SCHED_LIMIT 64
485
486 static ssize_t
487 show_periodic (struct class_device *class_dev, char *buf)
488 {
489         struct usb_bus          *bus;
490         struct usb_hcd          *hcd;
491         struct ehci_hcd         *ehci;
492         unsigned long           flags;
493         union ehci_shadow       p, *seen;
494         unsigned                temp, size, seen_count;
495         char                    *next;
496         unsigned                i;
497         __hc32                  tag;
498
499         if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
500                 return 0;
501         seen_count = 0;
502
503         bus = class_get_devdata(class_dev);
504         hcd = bus_to_hcd(bus);
505         ehci = hcd_to_ehci (hcd);
506         next = buf;
507         size = PAGE_SIZE;
508
509         temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
510         size -= temp;
511         next += temp;
512
513         /* dump a snapshot of the periodic schedule.
514          * iso changes, interrupt usually doesn't.
515          */
516         spin_lock_irqsave (&ehci->lock, flags);
517         for (i = 0; i < ehci->periodic_size; i++) {
518                 p = ehci->pshadow [i];
519                 if (likely (!p.ptr))
520                         continue;
521                 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
522
523                 temp = scnprintf (next, size, "%4d: ", i);
524                 size -= temp;
525                 next += temp;
526
527                 do {
528                         switch (hc32_to_cpu(ehci, tag)) {
529                         case Q_TYPE_QH:
530                                 temp = scnprintf (next, size, " qh%d-%04x/%p",
531                                                 p.qh->period,
532                                                 hc32_to_cpup(ehci,
533                                                                 &p.qh->hw_info2)
534                                                         /* uframe masks */
535                                                         & (QH_CMASK | QH_SMASK),
536                                                 p.qh);
537                                 size -= temp;
538                                 next += temp;
539                                 /* don't repeat what follows this qh */
540                                 for (temp = 0; temp < seen_count; temp++) {
541                                         if (seen [temp].ptr != p.ptr)
542                                                 continue;
543                                         if (p.qh->qh_next.ptr)
544                                                 temp = scnprintf (next, size,
545                                                         " ...");
546                                         p.ptr = NULL;
547                                         break;
548                                 }
549                                 /* show more info the first time around */
550                                 if (temp == seen_count && p.ptr) {
551                                         u32     scratch = hc32_to_cpup(ehci,
552                                                         &p.qh->hw_info1);
553                                         struct ehci_qtd *qtd;
554                                         char            *type = "";
555
556                                         /* count tds, get ep direction */
557                                         temp = 0;
558                                         list_for_each_entry (qtd,
559                                                         &p.qh->qtd_list,
560                                                         qtd_list) {
561                                                 temp++;
562                                                 switch (0x03 & (hc32_to_cpu(
563                                                         ehci,
564                                                         qtd->hw_token) >> 8)) {
565                                                 case 0: type = "out"; continue;
566                                                 case 1: type = "in"; continue;
567                                                 }
568                                         }
569
570                                         temp = scnprintf (next, size,
571                                                 " (%c%d ep%d%s "
572                                                 "[%d/%d] q%d p%d)",
573                                                 speed_char (scratch),
574                                                 scratch & 0x007f,
575                                                 (scratch >> 8) & 0x000f, type,
576                                                 p.qh->usecs, p.qh->c_usecs,
577                                                 temp,
578                                                 0x7ff & (scratch >> 16));
579
580                                         if (seen_count < DBG_SCHED_LIMIT)
581                                                 seen [seen_count++].qh = p.qh;
582                                 } else
583                                         temp = 0;
584                                 if (p.qh) {
585                                         tag = Q_NEXT_TYPE(ehci, p.qh->hw_next);
586                                         p = p.qh->qh_next;
587                                 }
588                                 break;
589                         case Q_TYPE_FSTN:
590                                 temp = scnprintf (next, size,
591                                         " fstn-%8x/%p", p.fstn->hw_prev,
592                                         p.fstn);
593                                 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
594                                 p = p.fstn->fstn_next;
595                                 break;
596                         case Q_TYPE_ITD:
597                                 temp = scnprintf (next, size,
598                                         " itd/%p", p.itd);
599                                 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
600                                 p = p.itd->itd_next;
601                                 break;
602                         case Q_TYPE_SITD:
603                                 temp = scnprintf (next, size,
604                                         " sitd%d-%04x/%p",
605                                         p.sitd->stream->interval,
606                                         hc32_to_cpup(ehci, &p.sitd->hw_uframe)
607                                                 & 0x0000ffff,
608                                         p.sitd);
609                                 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
610                                 p = p.sitd->sitd_next;
611                                 break;
612                         }
613                         size -= temp;
614                         next += temp;
615                 } while (p.ptr);
616
617                 temp = scnprintf (next, size, "\n");
618                 size -= temp;
619                 next += temp;
620         }
621         spin_unlock_irqrestore (&ehci->lock, flags);
622         kfree (seen);
623
624         return PAGE_SIZE - size;
625 }
626 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
627
628 #undef DBG_SCHED_LIMIT
629
630 static ssize_t
631 show_registers (struct class_device *class_dev, char *buf)
632 {
633         struct usb_bus          *bus;
634         struct usb_hcd          *hcd;
635         struct ehci_hcd         *ehci;
636         unsigned long           flags;
637         unsigned                temp, size, i;
638         char                    *next, scratch [80];
639         static char             fmt [] = "%*s\n";
640         static char             label [] = "";
641
642         bus = class_get_devdata(class_dev);
643         hcd = bus_to_hcd(bus);
644         ehci = hcd_to_ehci (hcd);
645         next = buf;
646         size = PAGE_SIZE;
647
648         spin_lock_irqsave (&ehci->lock, flags);
649
650         if (bus->controller->power.power_state.event) {
651                 size = scnprintf (next, size,
652                         "bus %s, device %s (driver " DRIVER_VERSION ")\n"
653                         "%s\n"
654                         "SUSPENDED (no register access)\n",
655                         hcd->self.controller->bus->name,
656                         hcd->self.controller->bus_id,
657                         hcd->product_desc);
658                 goto done;
659         }
660
661         /* Capability Registers */
662         i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
663         temp = scnprintf (next, size,
664                 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
665                 "%s\n"
666                 "EHCI %x.%02x, hcd state %d\n",
667                 hcd->self.controller->bus->name,
668                 hcd->self.controller->bus_id,
669                 hcd->product_desc,
670                 i >> 8, i & 0x0ff, hcd->state);
671         size -= temp;
672         next += temp;
673
674 #ifdef  CONFIG_PCI
675         /* EHCI 0.96 and later may have "extended capabilities" */
676         if (hcd->self.controller->bus == &pci_bus_type) {
677                 struct pci_dev  *pdev;
678                 u32             offset, cap, cap2;
679                 unsigned        count = 256/4;
680
681                 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
682                 offset = HCC_EXT_CAPS(ehci_readl(ehci,
683                                 &ehci->caps->hcc_params));
684                 while (offset && count--) {
685                         pci_read_config_dword (pdev, offset, &cap);
686                         switch (cap & 0xff) {
687                         case 1:
688                                 temp = scnprintf (next, size,
689                                         "ownership %08x%s%s\n", cap,
690                                         (cap & (1 << 24)) ? " linux" : "",
691                                         (cap & (1 << 16)) ? " firmware" : "");
692                                 size -= temp;
693                                 next += temp;
694
695                                 offset += 4;
696                                 pci_read_config_dword (pdev, offset, &cap2);
697                                 temp = scnprintf (next, size,
698                                         "SMI sts/enable 0x%08x\n", cap2);
699                                 size -= temp;
700                                 next += temp;
701                                 break;
702                         case 0:         /* illegal reserved capability */
703                                 cap = 0;
704                                 /* FALLTHROUGH */
705                         default:                /* unknown */
706                                 break;
707                         }
708                         temp = (cap >> 8) & 0xff;
709                 }
710         }
711 #endif
712
713         // FIXME interpret both types of params
714         i = ehci_readl(ehci, &ehci->caps->hcs_params);
715         temp = scnprintf (next, size, "structural params 0x%08x\n", i);
716         size -= temp;
717         next += temp;
718
719         i = ehci_readl(ehci, &ehci->caps->hcc_params);
720         temp = scnprintf (next, size, "capability params 0x%08x\n", i);
721         size -= temp;
722         next += temp;
723
724         /* Operational Registers */
725         temp = dbg_status_buf (scratch, sizeof scratch, label,
726                         ehci_readl(ehci, &ehci->regs->status));
727         temp = scnprintf (next, size, fmt, temp, scratch);
728         size -= temp;
729         next += temp;
730
731         temp = dbg_command_buf (scratch, sizeof scratch, label,
732                         ehci_readl(ehci, &ehci->regs->command));
733         temp = scnprintf (next, size, fmt, temp, scratch);
734         size -= temp;
735         next += temp;
736
737         temp = dbg_intr_buf (scratch, sizeof scratch, label,
738                         ehci_readl(ehci, &ehci->regs->intr_enable));
739         temp = scnprintf (next, size, fmt, temp, scratch);
740         size -= temp;
741         next += temp;
742
743         temp = scnprintf (next, size, "uframe %04x\n",
744                         ehci_readl(ehci, &ehci->regs->frame_index));
745         size -= temp;
746         next += temp;
747
748         for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
749                 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
750                                 ehci_readl(ehci,
751                                         &ehci->regs->port_status[i - 1]));
752                 temp = scnprintf (next, size, fmt, temp, scratch);
753                 size -= temp;
754                 next += temp;
755                 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
756                         temp = scnprintf (next, size,
757                                         "    debug control %08x\n",
758                                         ehci_readl(ehci,
759                                                 &ehci->debug->control));
760                         size -= temp;
761                         next += temp;
762                 }
763         }
764
765         if (ehci->reclaim) {
766                 temp = scnprintf (next, size, "reclaim qh %p%s\n",
767                                 ehci->reclaim,
768                                 ehci->reclaim_ready ? " ready" : "");
769                 size -= temp;
770                 next += temp;
771         }
772
773 #ifdef EHCI_STATS
774         temp = scnprintf (next, size,
775                 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
776                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
777                 ehci->stats.lost_iaa);
778         size -= temp;
779         next += temp;
780
781         temp = scnprintf (next, size, "complete %ld unlink %ld\n",
782                 ehci->stats.complete, ehci->stats.unlink);
783         size -= temp;
784         next += temp;
785 #endif
786
787 done:
788         spin_unlock_irqrestore (&ehci->lock, flags);
789
790         return PAGE_SIZE - size;
791 }
792 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
793
794 static inline void create_debug_files (struct ehci_hcd *ehci)
795 {
796         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
797         int retval;
798
799         retval = class_device_create_file(cldev, &class_device_attr_async);
800         retval = class_device_create_file(cldev, &class_device_attr_periodic);
801         retval = class_device_create_file(cldev, &class_device_attr_registers);
802 }
803
804 static inline void remove_debug_files (struct ehci_hcd *ehci)
805 {
806         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
807
808         class_device_remove_file(cldev, &class_device_attr_async);
809         class_device_remove_file(cldev, &class_device_attr_periodic);
810         class_device_remove_file(cldev, &class_device_attr_registers);
811 }
812
813 #endif /* STUB_DEBUG_FILES */
814