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21#ifdef DEBUG
22
23
24
25
26
27static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
28{
29 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
30
31 ehci_dbg (ehci,
32 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
33 label, params,
34 HCS_DEBUG_PORT (params),
35 HCS_INDICATOR (params) ? " ind" : "",
36 HCS_N_CC (params),
37 HCS_N_PCC (params),
38 HCS_PORTROUTED (params) ? "" : " ordered",
39 HCS_PPC (params) ? "" : " !ppc",
40 HCS_N_PORTS (params)
41 );
42
43 if (HCS_PORTROUTED (params)) {
44 int i;
45 char buf [46], tmp [7], byte;
46
47 buf[0] = 0;
48 for (i = 0; i < HCS_N_PORTS (params); i++) {
49
50 byte = readb (&ehci->caps->portroute[(i>>1)]);
51 sprintf(tmp, "%d ",
52 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
53 strcat(buf, tmp);
54 }
55 ehci_dbg (ehci, "%s portroute %s\n",
56 label, buf);
57 }
58}
59#else
60
61static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
62
63#endif
64
65#ifdef DEBUG
66
67
68
69
70
71static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
72{
73 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
74
75 if (HCC_ISOC_CACHE (params)) {
76 ehci_dbg (ehci,
77 "%s hcc_params %04x caching frame %s%s%s\n",
78 label, params,
79 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
80 HCC_CANPARK(params) ? " park" : "",
81 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
82 } else {
83 ehci_dbg (ehci,
84 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
85 label,
86 params,
87 HCC_ISOC_THRES(params),
88 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
89 HCC_CANPARK(params) ? " park" : "",
90 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
91 HCC_LPM(params) ? " LPM" : "",
92 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
93 HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
94 HCC_32FRAME_PERIODIC_LIST(params) ?
95 " 32 periodic list" : "");
96 }
97}
98#else
99
100static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
101
102#endif
103
104#ifdef DEBUG
105
106static void __maybe_unused
107dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
108{
109 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
110 hc32_to_cpup(ehci, &qtd->hw_next),
111 hc32_to_cpup(ehci, &qtd->hw_alt_next),
112 hc32_to_cpup(ehci, &qtd->hw_token),
113 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
114 if (qtd->hw_buf [1])
115 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
116 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
117 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
118 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
119 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
120}
121
122static void __maybe_unused
123dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
124{
125 struct ehci_qh_hw *hw = qh->hw;
126
127 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
128 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
129 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
130}
131
132static void __maybe_unused
133dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
134{
135 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
136 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
137 itd->urb);
138 ehci_dbg (ehci,
139 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
140 hc32_to_cpu(ehci, itd->hw_transaction[0]),
141 hc32_to_cpu(ehci, itd->hw_transaction[1]),
142 hc32_to_cpu(ehci, itd->hw_transaction[2]),
143 hc32_to_cpu(ehci, itd->hw_transaction[3]),
144 hc32_to_cpu(ehci, itd->hw_transaction[4]),
145 hc32_to_cpu(ehci, itd->hw_transaction[5]),
146 hc32_to_cpu(ehci, itd->hw_transaction[6]),
147 hc32_to_cpu(ehci, itd->hw_transaction[7]));
148 ehci_dbg (ehci,
149 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
150 hc32_to_cpu(ehci, itd->hw_bufp[0]),
151 hc32_to_cpu(ehci, itd->hw_bufp[1]),
152 hc32_to_cpu(ehci, itd->hw_bufp[2]),
153 hc32_to_cpu(ehci, itd->hw_bufp[3]),
154 hc32_to_cpu(ehci, itd->hw_bufp[4]),
155 hc32_to_cpu(ehci, itd->hw_bufp[5]),
156 hc32_to_cpu(ehci, itd->hw_bufp[6]));
157 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
158 itd->index[0], itd->index[1], itd->index[2],
159 itd->index[3], itd->index[4], itd->index[5],
160 itd->index[6], itd->index[7]);
161}
162
163static void __maybe_unused
164dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
165{
166 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
167 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
168 sitd->urb);
169 ehci_dbg (ehci,
170 " addr %08x sched %04x result %08x buf %08x %08x\n",
171 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
172 hc32_to_cpu(ehci, sitd->hw_uframe),
173 hc32_to_cpu(ehci, sitd->hw_results),
174 hc32_to_cpu(ehci, sitd->hw_buf[0]),
175 hc32_to_cpu(ehci, sitd->hw_buf[1]));
176}
177
178static int __maybe_unused
179dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
180{
181 return scnprintf (buf, len,
182 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
183 label, label [0] ? " " : "", status,
184 (status & STS_PPCE_MASK) ? " PPCE" : "",
185 (status & STS_ASS) ? " Async" : "",
186 (status & STS_PSS) ? " Periodic" : "",
187 (status & STS_RECL) ? " Recl" : "",
188 (status & STS_HALT) ? " Halt" : "",
189 (status & STS_IAA) ? " IAA" : "",
190 (status & STS_FATAL) ? " FATAL" : "",
191 (status & STS_FLR) ? " FLR" : "",
192 (status & STS_PCD) ? " PCD" : "",
193 (status & STS_ERR) ? " ERR" : "",
194 (status & STS_INT) ? " INT" : ""
195 );
196}
197
198static int __maybe_unused
199dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
200{
201 return scnprintf (buf, len,
202 "%s%sintrenable %02x%s%s%s%s%s%s%s",
203 label, label [0] ? " " : "", enable,
204 (enable & STS_PPCE_MASK) ? " PPCE" : "",
205 (enable & STS_IAA) ? " IAA" : "",
206 (enable & STS_FATAL) ? " FATAL" : "",
207 (enable & STS_FLR) ? " FLR" : "",
208 (enable & STS_PCD) ? " PCD" : "",
209 (enable & STS_ERR) ? " ERR" : "",
210 (enable & STS_INT) ? " INT" : ""
211 );
212}
213
214static const char *const fls_strings [] =
215 { "1024", "512", "256", "??" };
216
217static int
218dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
219{
220 return scnprintf (buf, len,
221 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
222 "period=%s%s %s",
223 label, label [0] ? " " : "", command,
224 (command & CMD_HIRD) ? " HIRD" : "",
225 (command & CMD_PPCEE) ? " PPCEE" : "",
226 (command & CMD_FSP) ? " FSP" : "",
227 (command & CMD_ASPE) ? " ASPE" : "",
228 (command & CMD_PSPE) ? " PSPE" : "",
229 (command & CMD_PARK) ? " park" : "(park)",
230 CMD_PARK_CNT (command),
231 (command >> 16) & 0x3f,
232 (command & CMD_LRESET) ? " LReset" : "",
233 (command & CMD_IAAD) ? " IAAD" : "",
234 (command & CMD_ASE) ? " Async" : "",
235 (command & CMD_PSE) ? " Periodic" : "",
236 fls_strings [(command >> 2) & 0x3],
237 (command & CMD_RESET) ? " Reset" : "",
238 (command & CMD_RUN) ? "RUN" : "HALT"
239 );
240}
241
242static int
243dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
244{
245 char *sig;
246
247
248 switch (status & (3 << 10)) {
249 case 0 << 10: sig = "se0"; break;
250 case 1 << 10: sig = "k"; break;
251 case 2 << 10: sig = "j"; break;
252 default: sig = "?"; break;
253 }
254
255 return scnprintf (buf, len,
256 "%s%sport:%d status %06x %d %s%s%s%s%s%s "
257 "sig=%s%s%s%s%s%s%s%s%s%s%s",
258 label, label [0] ? " " : "", port, status,
259 status>>25,
260 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ?
261 " ACK" : "",
262 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ?
263 " NYET" : "",
264 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ?
265 " STALL" : "",
266 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ?
267 " ERR" : "",
268 (status & PORT_POWER) ? " POWER" : "",
269 (status & PORT_OWNER) ? " OWNER" : "",
270 sig,
271 (status & PORT_LPM) ? " LPM" : "",
272 (status & PORT_RESET) ? " RESET" : "",
273 (status & PORT_SUSPEND) ? " SUSPEND" : "",
274 (status & PORT_RESUME) ? " RESUME" : "",
275 (status & PORT_OCC) ? " OCC" : "",
276 (status & PORT_OC) ? " OC" : "",
277 (status & PORT_PEC) ? " PEC" : "",
278 (status & PORT_PE) ? " PE" : "",
279 (status & PORT_CSC) ? " CSC" : "",
280 (status & PORT_CONNECT) ? " CONNECT" : "");
281}
282
283#else
284static inline void __maybe_unused
285dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
286{}
287
288static inline int __maybe_unused
289dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
290{ return 0; }
291
292static inline int __maybe_unused
293dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
294{ return 0; }
295
296static inline int __maybe_unused
297dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
298{ return 0; }
299
300static inline int __maybe_unused
301dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
302{ return 0; }
303
304#endif
305
306
307#define dbg_status(ehci, label, status) { \
308 char _buf [80]; \
309 dbg_status_buf (_buf, sizeof _buf, label, status); \
310 ehci_dbg (ehci, "%s\n", _buf); \
311}
312
313#define dbg_cmd(ehci, label, command) { \
314 char _buf [80]; \
315 dbg_command_buf (_buf, sizeof _buf, label, command); \
316 ehci_dbg (ehci, "%s\n", _buf); \
317}
318
319#define dbg_port(ehci, label, port, status) { \
320 char _buf [80]; \
321 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
322 ehci_dbg (ehci, "%s\n", _buf); \
323}
324
325
326
327#ifdef STUB_DEBUG_FILES
328
329static inline void create_debug_files (struct ehci_hcd *bus) { }
330static inline void remove_debug_files (struct ehci_hcd *bus) { }
331
332#else
333
334
335
336static int debug_async_open(struct inode *, struct file *);
337static int debug_periodic_open(struct inode *, struct file *);
338static int debug_registers_open(struct inode *, struct file *);
339static int debug_async_open(struct inode *, struct file *);
340
341static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
342static int debug_close(struct inode *, struct file *);
343
344static const struct file_operations debug_async_fops = {
345 .owner = THIS_MODULE,
346 .open = debug_async_open,
347 .read = debug_output,
348 .release = debug_close,
349 .llseek = default_llseek,
350};
351static const struct file_operations debug_periodic_fops = {
352 .owner = THIS_MODULE,
353 .open = debug_periodic_open,
354 .read = debug_output,
355 .release = debug_close,
356 .llseek = default_llseek,
357};
358static const struct file_operations debug_registers_fops = {
359 .owner = THIS_MODULE,
360 .open = debug_registers_open,
361 .read = debug_output,
362 .release = debug_close,
363 .llseek = default_llseek,
364};
365
366static struct dentry *ehci_debug_root;
367
368struct debug_buffer {
369 ssize_t (*fill_func)(struct debug_buffer *);
370 struct usb_bus *bus;
371 struct mutex mutex;
372 size_t count;
373 char *output_buf;
374 size_t alloc_size;
375};
376
377#define speed_char(info1) ({ char tmp; \
378 switch (info1 & (3 << 12)) { \
379 case QH_FULL_SPEED: tmp = 'f'; break; \
380 case QH_LOW_SPEED: tmp = 'l'; break; \
381 case QH_HIGH_SPEED: tmp = 'h'; break; \
382 default: tmp = '?'; break; \
383 }; tmp; })
384
385static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
386{
387 __u32 v = hc32_to_cpu(ehci, token);
388
389 if (v & QTD_STS_ACTIVE)
390 return '*';
391 if (v & QTD_STS_HALT)
392 return '-';
393 if (!IS_SHORT_READ (v))
394 return ' ';
395
396 return '/';
397}
398
399static void qh_lines (
400 struct ehci_hcd *ehci,
401 struct ehci_qh *qh,
402 char **nextp,
403 unsigned *sizep
404)
405{
406 u32 scratch;
407 u32 hw_curr;
408 struct list_head *entry;
409 struct ehci_qtd *td;
410 unsigned temp;
411 unsigned size = *sizep;
412 char *next = *nextp;
413 char mark;
414 __le32 list_end = EHCI_LIST_END(ehci);
415 struct ehci_qh_hw *hw = qh->hw;
416
417 if (hw->hw_qtd_next == list_end)
418 mark = '@';
419 else
420 mark = token_mark(ehci, hw->hw_token);
421 if (mark == '/') {
422 if ((hw->hw_alt_next & QTD_MASK(ehci))
423 == ehci->async->hw->hw_alt_next)
424 mark = '#';
425 else if (hw->hw_alt_next == list_end)
426 mark = '.';
427
428 }
429 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
430 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
431 temp = scnprintf (next, size,
432 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
433 qh, scratch & 0x007f,
434 speed_char (scratch),
435 (scratch >> 8) & 0x000f,
436 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
437 hc32_to_cpup(ehci, &hw->hw_token), mark,
438 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
439 ? "data1" : "data0",
440 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
441 size -= temp;
442 next += temp;
443
444
445 list_for_each (entry, &qh->qtd_list) {
446 td = list_entry (entry, struct ehci_qtd, qtd_list);
447 scratch = hc32_to_cpup(ehci, &td->hw_token);
448 mark = ' ';
449 if (hw_curr == td->qtd_dma)
450 mark = '*';
451 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
452 mark = '+';
453 else if (QTD_LENGTH (scratch)) {
454 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
455 mark = '#';
456 else if (td->hw_alt_next != list_end)
457 mark = '/';
458 }
459 temp = snprintf (next, size,
460 "\n\t%p%c%s len=%d %08x urb %p",
461 td, mark, ({ char *tmp;
462 switch ((scratch>>8)&0x03) {
463 case 0: tmp = "out"; break;
464 case 1: tmp = "in"; break;
465 case 2: tmp = "setup"; break;
466 default: tmp = "?"; break;
467 } tmp;}),
468 (scratch >> 16) & 0x7fff,
469 scratch,
470 td->urb);
471 if (size < temp)
472 temp = size;
473 size -= temp;
474 next += temp;
475 if (temp == size)
476 goto done;
477 }
478
479 temp = snprintf (next, size, "\n");
480 if (size < temp)
481 temp = size;
482 size -= temp;
483 next += temp;
484
485done:
486 *sizep = size;
487 *nextp = next;
488}
489
490static ssize_t fill_async_buffer(struct debug_buffer *buf)
491{
492 struct usb_hcd *hcd;
493 struct ehci_hcd *ehci;
494 unsigned long flags;
495 unsigned temp, size;
496 char *next;
497 struct ehci_qh *qh;
498
499 hcd = bus_to_hcd(buf->bus);
500 ehci = hcd_to_ehci (hcd);
501 next = buf->output_buf;
502 size = buf->alloc_size;
503
504 *next = 0;
505
506
507
508
509
510 spin_lock_irqsave (&ehci->lock, flags);
511 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
512 qh_lines (ehci, qh, &next, &size);
513 if (!list_empty(&ehci->async_unlink) && size > 0) {
514 temp = scnprintf(next, size, "\nunlink =\n");
515 size -= temp;
516 next += temp;
517
518 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) {
519 if (size <= 0)
520 break;
521 qh_lines(ehci, qh, &next, &size);
522 }
523 }
524 spin_unlock_irqrestore (&ehci->lock, flags);
525
526 return strlen(buf->output_buf);
527}
528
529#define DBG_SCHED_LIMIT 64
530static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
531{
532 struct usb_hcd *hcd;
533 struct ehci_hcd *ehci;
534 unsigned long flags;
535 union ehci_shadow p, *seen;
536 unsigned temp, size, seen_count;
537 char *next;
538 unsigned i;
539 __hc32 tag;
540
541 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
542 return 0;
543 seen_count = 0;
544
545 hcd = bus_to_hcd(buf->bus);
546 ehci = hcd_to_ehci (hcd);
547 next = buf->output_buf;
548 size = buf->alloc_size;
549
550 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
551 size -= temp;
552 next += temp;
553
554
555
556
557 spin_lock_irqsave (&ehci->lock, flags);
558 for (i = 0; i < ehci->periodic_size; i++) {
559 p = ehci->pshadow [i];
560 if (likely (!p.ptr))
561 continue;
562 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
563
564 temp = scnprintf (next, size, "%4d: ", i);
565 size -= temp;
566 next += temp;
567
568 do {
569 struct ehci_qh_hw *hw;
570
571 switch (hc32_to_cpu(ehci, tag)) {
572 case Q_TYPE_QH:
573 hw = p.qh->hw;
574 temp = scnprintf (next, size, " qh%d-%04x/%p",
575 p.qh->period,
576 hc32_to_cpup(ehci,
577 &hw->hw_info2)
578
579 & (QH_CMASK | QH_SMASK),
580 p.qh);
581 size -= temp;
582 next += temp;
583
584 for (temp = 0; temp < seen_count; temp++) {
585 if (seen [temp].ptr != p.ptr)
586 continue;
587 if (p.qh->qh_next.ptr) {
588 temp = scnprintf (next, size,
589 " ...");
590 size -= temp;
591 next += temp;
592 }
593 break;
594 }
595
596 if (temp == seen_count) {
597 u32 scratch = hc32_to_cpup(ehci,
598 &hw->hw_info1);
599 struct ehci_qtd *qtd;
600 char *type = "";
601
602
603 temp = 0;
604 list_for_each_entry (qtd,
605 &p.qh->qtd_list,
606 qtd_list) {
607 temp++;
608 switch (0x03 & (hc32_to_cpu(
609 ehci,
610 qtd->hw_token) >> 8)) {
611 case 0: type = "out"; continue;
612 case 1: type = "in"; continue;
613 }
614 }
615
616 temp = scnprintf (next, size,
617 " (%c%d ep%d%s "
618 "[%d/%d] q%d p%d)",
619 speed_char (scratch),
620 scratch & 0x007f,
621 (scratch >> 8) & 0x000f, type,
622 p.qh->usecs, p.qh->c_usecs,
623 temp,
624 0x7ff & (scratch >> 16));
625
626 if (seen_count < DBG_SCHED_LIMIT)
627 seen [seen_count++].qh = p.qh;
628 } else
629 temp = 0;
630 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
631 p = p.qh->qh_next;
632 break;
633 case Q_TYPE_FSTN:
634 temp = scnprintf (next, size,
635 " fstn-%8x/%p", p.fstn->hw_prev,
636 p.fstn);
637 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
638 p = p.fstn->fstn_next;
639 break;
640 case Q_TYPE_ITD:
641 temp = scnprintf (next, size,
642 " itd/%p", p.itd);
643 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
644 p = p.itd->itd_next;
645 break;
646 case Q_TYPE_SITD:
647 temp = scnprintf (next, size,
648 " sitd%d-%04x/%p",
649 p.sitd->stream->interval,
650 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
651 & 0x0000ffff,
652 p.sitd);
653 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
654 p = p.sitd->sitd_next;
655 break;
656 }
657 size -= temp;
658 next += temp;
659 } while (p.ptr);
660
661 temp = scnprintf (next, size, "\n");
662 size -= temp;
663 next += temp;
664 }
665 spin_unlock_irqrestore (&ehci->lock, flags);
666 kfree (seen);
667
668 return buf->alloc_size - size;
669}
670#undef DBG_SCHED_LIMIT
671
672static const char *rh_state_string(struct ehci_hcd *ehci)
673{
674 switch (ehci->rh_state) {
675 case EHCI_RH_HALTED:
676 return "halted";
677 case EHCI_RH_SUSPENDED:
678 return "suspended";
679 case EHCI_RH_RUNNING:
680 return "running";
681 case EHCI_RH_STOPPING:
682 return "stopping";
683 }
684 return "?";
685}
686
687static ssize_t fill_registers_buffer(struct debug_buffer *buf)
688{
689 struct usb_hcd *hcd;
690 struct ehci_hcd *ehci;
691 unsigned long flags;
692 unsigned temp, size, i;
693 char *next, scratch [80];
694 static char fmt [] = "%*s\n";
695 static char label [] = "";
696
697 hcd = bus_to_hcd(buf->bus);
698 ehci = hcd_to_ehci (hcd);
699 next = buf->output_buf;
700 size = buf->alloc_size;
701
702 spin_lock_irqsave (&ehci->lock, flags);
703
704 if (!HCD_HW_ACCESSIBLE(hcd)) {
705 size = scnprintf (next, size,
706 "bus %s, device %s\n"
707 "%s\n"
708 "SUSPENDED (no register access)\n",
709 hcd->self.controller->bus->name,
710 dev_name(hcd->self.controller),
711 hcd->product_desc);
712 goto done;
713 }
714
715
716 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
717 temp = scnprintf (next, size,
718 "bus %s, device %s\n"
719 "%s\n"
720 "EHCI %x.%02x, rh state %s\n",
721 hcd->self.controller->bus->name,
722 dev_name(hcd->self.controller),
723 hcd->product_desc,
724 i >> 8, i & 0x0ff, rh_state_string(ehci));
725 size -= temp;
726 next += temp;
727
728#ifdef CONFIG_PCI
729
730 if (hcd->self.controller->bus == &pci_bus_type) {
731 struct pci_dev *pdev;
732 u32 offset, cap, cap2;
733 unsigned count = 256/4;
734
735 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
736 offset = HCC_EXT_CAPS(ehci_readl(ehci,
737 &ehci->caps->hcc_params));
738 while (offset && count--) {
739 pci_read_config_dword (pdev, offset, &cap);
740 switch (cap & 0xff) {
741 case 1:
742 temp = scnprintf (next, size,
743 "ownership %08x%s%s\n", cap,
744 (cap & (1 << 24)) ? " linux" : "",
745 (cap & (1 << 16)) ? " firmware" : "");
746 size -= temp;
747 next += temp;
748
749 offset += 4;
750 pci_read_config_dword (pdev, offset, &cap2);
751 temp = scnprintf (next, size,
752 "SMI sts/enable 0x%08x\n", cap2);
753 size -= temp;
754 next += temp;
755 break;
756 case 0:
757 cap = 0;
758
759 default:
760 break;
761 }
762 temp = (cap >> 8) & 0xff;
763 }
764 }
765#endif
766
767
768 i = ehci_readl(ehci, &ehci->caps->hcs_params);
769 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
770 size -= temp;
771 next += temp;
772
773 i = ehci_readl(ehci, &ehci->caps->hcc_params);
774 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
775 size -= temp;
776 next += temp;
777
778
779 temp = dbg_status_buf (scratch, sizeof scratch, label,
780 ehci_readl(ehci, &ehci->regs->status));
781 temp = scnprintf (next, size, fmt, temp, scratch);
782 size -= temp;
783 next += temp;
784
785 temp = dbg_command_buf (scratch, sizeof scratch, label,
786 ehci_readl(ehci, &ehci->regs->command));
787 temp = scnprintf (next, size, fmt, temp, scratch);
788 size -= temp;
789 next += temp;
790
791 temp = dbg_intr_buf (scratch, sizeof scratch, label,
792 ehci_readl(ehci, &ehci->regs->intr_enable));
793 temp = scnprintf (next, size, fmt, temp, scratch);
794 size -= temp;
795 next += temp;
796
797 temp = scnprintf (next, size, "uframe %04x\n",
798 ehci_read_frame_index(ehci));
799 size -= temp;
800 next += temp;
801
802 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
803 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
804 ehci_readl(ehci,
805 &ehci->regs->port_status[i - 1]));
806 temp = scnprintf (next, size, fmt, temp, scratch);
807 size -= temp;
808 next += temp;
809 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
810 temp = scnprintf (next, size,
811 " debug control %08x\n",
812 ehci_readl(ehci,
813 &ehci->debug->control));
814 size -= temp;
815 next += temp;
816 }
817 }
818
819 if (!list_empty(&ehci->async_unlink)) {
820 temp = scnprintf(next, size, "async unlink qh %p\n",
821 list_first_entry(&ehci->async_unlink,
822 struct ehci_qh, unlink_node));
823 size -= temp;
824 next += temp;
825 }
826
827#ifdef EHCI_STATS
828 temp = scnprintf (next, size,
829 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
830 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
831 ehci->stats.lost_iaa);
832 size -= temp;
833 next += temp;
834
835 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
836 ehci->stats.complete, ehci->stats.unlink);
837 size -= temp;
838 next += temp;
839#endif
840
841done:
842 spin_unlock_irqrestore (&ehci->lock, flags);
843
844 return buf->alloc_size - size;
845}
846
847static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
848 ssize_t (*fill_func)(struct debug_buffer *))
849{
850 struct debug_buffer *buf;
851
852 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
853
854 if (buf) {
855 buf->bus = bus;
856 buf->fill_func = fill_func;
857 mutex_init(&buf->mutex);
858 buf->alloc_size = PAGE_SIZE;
859 }
860
861 return buf;
862}
863
864static int fill_buffer(struct debug_buffer *buf)
865{
866 int ret = 0;
867
868 if (!buf->output_buf)
869 buf->output_buf = vmalloc(buf->alloc_size);
870
871 if (!buf->output_buf) {
872 ret = -ENOMEM;
873 goto out;
874 }
875
876 ret = buf->fill_func(buf);
877
878 if (ret >= 0) {
879 buf->count = ret;
880 ret = 0;
881 }
882
883out:
884 return ret;
885}
886
887static ssize_t debug_output(struct file *file, char __user *user_buf,
888 size_t len, loff_t *offset)
889{
890 struct debug_buffer *buf = file->private_data;
891 int ret = 0;
892
893 mutex_lock(&buf->mutex);
894 if (buf->count == 0) {
895 ret = fill_buffer(buf);
896 if (ret != 0) {
897 mutex_unlock(&buf->mutex);
898 goto out;
899 }
900 }
901 mutex_unlock(&buf->mutex);
902
903 ret = simple_read_from_buffer(user_buf, len, offset,
904 buf->output_buf, buf->count);
905
906out:
907 return ret;
908
909}
910
911static int debug_close(struct inode *inode, struct file *file)
912{
913 struct debug_buffer *buf = file->private_data;
914
915 if (buf) {
916 vfree(buf->output_buf);
917 kfree(buf);
918 }
919
920 return 0;
921}
922static int debug_async_open(struct inode *inode, struct file *file)
923{
924 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
925
926 return file->private_data ? 0 : -ENOMEM;
927}
928
929static int debug_periodic_open(struct inode *inode, struct file *file)
930{
931 struct debug_buffer *buf;
932 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
933 if (!buf)
934 return -ENOMEM;
935
936 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
937 file->private_data = buf;
938 return 0;
939}
940
941static int debug_registers_open(struct inode *inode, struct file *file)
942{
943 file->private_data = alloc_buffer(inode->i_private,
944 fill_registers_buffer);
945
946 return file->private_data ? 0 : -ENOMEM;
947}
948
949static inline void create_debug_files (struct ehci_hcd *ehci)
950{
951 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
952
953 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
954 if (!ehci->debug_dir)
955 return;
956
957 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
958 &debug_async_fops))
959 goto file_error;
960
961 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
962 &debug_periodic_fops))
963 goto file_error;
964
965 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
966 &debug_registers_fops))
967 goto file_error;
968
969 return;
970
971file_error:
972 debugfs_remove_recursive(ehci->debug_dir);
973}
974
975static inline void remove_debug_files (struct ehci_hcd *ehci)
976{
977 debugfs_remove_recursive(ehci->debug_dir);
978}
979
980#endif
981
