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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#ifdef CONFIG_DYNAMIC_DEBUG
22
23/* check the values in the HCSPARAMS register
24 * (host controller _Structural_ parameters)
25 * see EHCI spec, Table 2-4 for each value
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 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
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 // FIXME MIPS won't readb() ...
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 CONFIG_DYNAMIC_DEBUG
66
67/* check the values in the HCCPARAMS register
68 * (host controller _Capability_ parameters)
69 * see EHCI Spec, Table 2-5 for each value
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 CONFIG_DYNAMIC_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 /* signaling state */
248 switch (status & (3 << 10)) {
249 case 0 << 10: sig = "se0"; break;
250 case 1 << 10: sig = "k"; break; /* low speed */
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,/*device address */
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 /* CONFIG_DYNAMIC_DEBUG */
305
306/* functions have the "wrong" filename when they're output... */
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/* troubleshooting help: expose state in debugfs */
335
336static int debug_async_open(struct inode *, struct file *);
337static int debug_bandwidth_open(struct inode *, struct file *);
338static int debug_periodic_open(struct inode *, struct file *);
339static int debug_registers_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_bandwidth_fops = {
352 .owner = THIS_MODULE,
353 .open = debug_bandwidth_open,
354 .read = debug_output,
355 .release = debug_close,
356 .llseek = default_llseek,
357};
358static const struct file_operations debug_periodic_fops = {
359 .owner = THIS_MODULE,
360 .open = debug_periodic_open,
361 .read = debug_output,
362 .release = debug_close,
363 .llseek = default_llseek,
364};
365static const struct file_operations debug_registers_fops = {
366 .owner = THIS_MODULE,
367 .open = debug_registers_open,
368 .read = debug_output,
369 .release = debug_close,
370 .llseek = default_llseek,
371};
372
373static struct dentry *ehci_debug_root;
374
375struct debug_buffer {
376 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
377 struct usb_bus *bus;
378 struct mutex mutex; /* protect filling of buffer */
379 size_t count; /* number of characters filled into buffer */
380 char *output_buf;
381 size_t alloc_size;
382};
383
384#define speed_char(info1) ({ char tmp; \
385 switch (info1 & (3 << 12)) { \
386 case QH_FULL_SPEED: tmp = 'f'; break; \
387 case QH_LOW_SPEED: tmp = 'l'; break; \
388 case QH_HIGH_SPEED: tmp = 'h'; break; \
389 default: tmp = '?'; break; \
390 } tmp; })
391
392static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
393{
394 __u32 v = hc32_to_cpu(ehci, token);
395
396 if (v & QTD_STS_ACTIVE)
397 return '*';
398 if (v & QTD_STS_HALT)
399 return '-';
400 if (!IS_SHORT_READ (v))
401 return ' ';
402 /* tries to advance through hw_alt_next */
403 return '/';
404}
405
406static void qh_lines (
407 struct ehci_hcd *ehci,
408 struct ehci_qh *qh,
409 char **nextp,
410 unsigned *sizep
411)
412{
413 u32 scratch;
414 u32 hw_curr;
415 struct list_head *entry;
416 struct ehci_qtd *td;
417 unsigned temp;
418 unsigned size = *sizep;
419 char *next = *nextp;
420 char mark;
421 __le32 list_end = EHCI_LIST_END(ehci);
422 struct ehci_qh_hw *hw = qh->hw;
423
424 if (hw->hw_qtd_next == list_end) /* NEC does this */
425 mark = '@';
426 else
427 mark = token_mark(ehci, hw->hw_token);
428 if (mark == '/') { /* qh_alt_next controls qh advance? */
429 if ((hw->hw_alt_next & QTD_MASK(ehci))
430 == ehci->async->hw->hw_alt_next)
431 mark = '#'; /* blocked */
432 else if (hw->hw_alt_next == list_end)
433 mark = '.'; /* use hw_qtd_next */
434 /* else alt_next points to some other qtd */
435 }
436 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
437 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
438 temp = scnprintf (next, size,
439 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
440 qh, scratch & 0x007f,
441 speed_char (scratch),
442 (scratch >> 8) & 0x000f,
443 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
444 hc32_to_cpup(ehci, &hw->hw_token), mark,
445 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
446 ? "data1" : "data0",
447 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
448 size -= temp;
449 next += temp;
450
451 /* hc may be modifying the list as we read it ... */
452 list_for_each (entry, &qh->qtd_list) {
453 td = list_entry (entry, struct ehci_qtd, qtd_list);
454 scratch = hc32_to_cpup(ehci, &td->hw_token);
455 mark = ' ';
456 if (hw_curr == td->qtd_dma)
457 mark = '*';
458 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
459 mark = '+';
460 else if (QTD_LENGTH (scratch)) {
461 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
462 mark = '#';
463 else if (td->hw_alt_next != list_end)
464 mark = '/';
465 }
466 temp = snprintf (next, size,
467 "\n\t%p%c%s len=%d %08x urb %p",
468 td, mark, ({ char *tmp;
469 switch ((scratch>>8)&0x03) {
470 case 0: tmp = "out"; break;
471 case 1: tmp = "in"; break;
472 case 2: tmp = "setup"; break;
473 default: tmp = "?"; break;
474 } tmp;}),
475 (scratch >> 16) & 0x7fff,
476 scratch,
477 td->urb);
478 if (size < temp)
479 temp = size;
480 size -= temp;
481 next += temp;
482 if (temp == size)
483 goto done;
484 }
485
486 temp = snprintf (next, size, "\n");
487 if (size < temp)
488 temp = size;
489 size -= temp;
490 next += temp;
491
492done:
493 *sizep = size;
494 *nextp = next;
495}
496
497static ssize_t fill_async_buffer(struct debug_buffer *buf)
498{
499 struct usb_hcd *hcd;
500 struct ehci_hcd *ehci;
501 unsigned long flags;
502 unsigned temp, size;
503 char *next;
504 struct ehci_qh *qh;
505
506 hcd = bus_to_hcd(buf->bus);
507 ehci = hcd_to_ehci (hcd);
508 next = buf->output_buf;
509 size = buf->alloc_size;
510
511 *next = 0;
512
513 /* dumps a snapshot of the async schedule.
514 * usually empty except for long-term bulk reads, or head.
515 * one QH per line, and TDs we know about
516 */
517 spin_lock_irqsave (&ehci->lock, flags);
518 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
519 qh_lines (ehci, qh, &next, &size);
520 if (!list_empty(&ehci->async_unlink) && size > 0) {
521 temp = scnprintf(next, size, "\nunlink =\n");
522 size -= temp;
523 next += temp;
524
525 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) {
526 if (size <= 0)
527 break;
528 qh_lines(ehci, qh, &next, &size);
529 }
530 }
531 spin_unlock_irqrestore (&ehci->lock, flags);
532
533 return strlen(buf->output_buf);
534}
535
536static ssize_t fill_bandwidth_buffer(struct debug_buffer *buf)
537{
538 struct ehci_hcd *ehci;
539 struct ehci_tt *tt;
540 struct ehci_per_sched *ps;
541 unsigned temp, size;
542 char *next;
543 unsigned i;
544 u8 *bw;
545 u16 *bf;
546 u8 budget[EHCI_BANDWIDTH_SIZE];
547
548 ehci = hcd_to_ehci(bus_to_hcd(buf->bus));
549 next = buf->output_buf;
550 size = buf->alloc_size;
551
552 *next = 0;
553
554 spin_lock_irq(&ehci->lock);
555
556 /* Dump the HS bandwidth table */
557 temp = scnprintf(next, size,
558 "HS bandwidth allocation (us per microframe)\n");
559 size -= temp;
560 next += temp;
561 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) {
562 bw = &ehci->bandwidth[i];
563 temp = scnprintf(next, size,
564 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n",
565 i, bw[0], bw[1], bw[2], bw[3],
566 bw[4], bw[5], bw[6], bw[7]);
567 size -= temp;
568 next += temp;
569 }
570
571 /* Dump all the FS/LS tables */
572 list_for_each_entry(tt, &ehci->tt_list, tt_list) {
573 temp = scnprintf(next, size,
574 "\nTT %s port %d FS/LS bandwidth allocation (us per frame)\n",
575 dev_name(&tt->usb_tt->hub->dev),
576 tt->tt_port + !!tt->usb_tt->multi);
577 size -= temp;
578 next += temp;
579
580 bf = tt->bandwidth;
581 temp = scnprintf(next, size,
582 " %5u%5u%5u%5u%5u%5u%5u%5u\n",
583 bf[0], bf[1], bf[2], bf[3],
584 bf[4], bf[5], bf[6], bf[7]);
585 size -= temp;
586 next += temp;
587
588 temp = scnprintf(next, size,
589 "FS/LS budget (us per microframe)\n");
590 size -= temp;
591 next += temp;
592 compute_tt_budget(budget, tt);
593 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) {
594 bw = &budget[i];
595 temp = scnprintf(next, size,
596 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n",
597 i, bw[0], bw[1], bw[2], bw[3],
598 bw[4], bw[5], bw[6], bw[7]);
599 size -= temp;
600 next += temp;
601 }
602 list_for_each_entry(ps, &tt->ps_list, ps_list) {
603 temp = scnprintf(next, size,
604 "%s ep %02x: %4u @ %2u.%u+%u mask %04x\n",
605 dev_name(&ps->udev->dev),
606 ps->ep->desc.bEndpointAddress,
607 ps->tt_usecs,
608 ps->bw_phase, ps->phase_uf,
609 ps->bw_period, ps->cs_mask);
610 size -= temp;
611 next += temp;
612 }
613 }
614 spin_unlock_irq(&ehci->lock);
615
616 return next - buf->output_buf;
617}
618
619#define DBG_SCHED_LIMIT 64
620static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
621{
622 struct usb_hcd *hcd;
623 struct ehci_hcd *ehci;
624 unsigned long flags;
625 union ehci_shadow p, *seen;
626 unsigned temp, size, seen_count;
627 char *next;
628 unsigned i;
629 __hc32 tag;
630
631 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
632 return 0;
633 seen_count = 0;
634
635 hcd = bus_to_hcd(buf->bus);
636 ehci = hcd_to_ehci (hcd);
637 next = buf->output_buf;
638 size = buf->alloc_size;
639
640 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
641 size -= temp;
642 next += temp;
643
644 /* dump a snapshot of the periodic schedule.
645 * iso changes, interrupt usually doesn't.
646 */
647 spin_lock_irqsave (&ehci->lock, flags);
648 for (i = 0; i < ehci->periodic_size; i++) {
649 p = ehci->pshadow [i];
650 if (likely (!p.ptr))
651 continue;
652 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
653
654 temp = scnprintf (next, size, "%4d: ", i);
655 size -= temp;
656 next += temp;
657
658 do {
659 struct ehci_qh_hw *hw;
660
661 switch (hc32_to_cpu(ehci, tag)) {
662 case Q_TYPE_QH:
663 hw = p.qh->hw;
664 temp = scnprintf (next, size, " qh%d-%04x/%p",
665 p.qh->ps.period,
666 hc32_to_cpup(ehci,
667 &hw->hw_info2)
668 /* uframe masks */
669 & (QH_CMASK | QH_SMASK),
670 p.qh);
671 size -= temp;
672 next += temp;
673 /* don't repeat what follows this qh */
674 for (temp = 0; temp < seen_count; temp++) {
675 if (seen [temp].ptr != p.ptr)
676 continue;
677 if (p.qh->qh_next.ptr) {
678 temp = scnprintf (next, size,
679 " ...");
680 size -= temp;
681 next += temp;
682 }
683 break;
684 }
685 /* show more info the first time around */
686 if (temp == seen_count) {
687 u32 scratch = hc32_to_cpup(ehci,
688 &hw->hw_info1);
689 struct ehci_qtd *qtd;
690 char *type = "";
691
692 /* count tds, get ep direction */
693 temp = 0;
694 list_for_each_entry (qtd,
695 &p.qh->qtd_list,
696 qtd_list) {
697 temp++;
698 switch (0x03 & (hc32_to_cpu(
699 ehci,
700 qtd->hw_token) >> 8)) {
701 case 0: type = "out"; continue;
702 case 1: type = "in"; continue;
703 }
704 }
705
706 temp = scnprintf (next, size,
707 " (%c%d ep%d%s "
708 "[%d/%d] q%d p%d)",
709 speed_char (scratch),
710 scratch & 0x007f,
711 (scratch >> 8) & 0x000f, type,
712 p.qh->ps.usecs,
713 p.qh->ps.c_usecs,
714 temp,
715 0x7ff & (scratch >> 16));
716
717 if (seen_count < DBG_SCHED_LIMIT)
718 seen [seen_count++].qh = p.qh;
719 } else
720 temp = 0;
721 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
722 p = p.qh->qh_next;
723 break;
724 case Q_TYPE_FSTN:
725 temp = scnprintf (next, size,
726 " fstn-%8x/%p", p.fstn->hw_prev,
727 p.fstn);
728 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
729 p = p.fstn->fstn_next;
730 break;
731 case Q_TYPE_ITD:
732 temp = scnprintf (next, size,
733 " itd/%p", p.itd);
734 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
735 p = p.itd->itd_next;
736 break;
737 case Q_TYPE_SITD:
738 temp = scnprintf (next, size,
739 " sitd%d-%04x/%p",
740 p.sitd->stream->ps.period,
741 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
742 & 0x0000ffff,
743 p.sitd);
744 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
745 p = p.sitd->sitd_next;
746 break;
747 }
748 size -= temp;
749 next += temp;
750 } while (p.ptr);
751
752 temp = scnprintf (next, size, "\n");
753 size -= temp;
754 next += temp;
755 }
756 spin_unlock_irqrestore (&ehci->lock, flags);
757 kfree (seen);
758
759 return buf->alloc_size - size;
760}
761#undef DBG_SCHED_LIMIT
762
763static const char *rh_state_string(struct ehci_hcd *ehci)
764{
765 switch (ehci->rh_state) {
766 case EHCI_RH_HALTED:
767 return "halted";
768 case EHCI_RH_SUSPENDED:
769 return "suspended";
770 case EHCI_RH_RUNNING:
771 return "running";
772 case EHCI_RH_STOPPING:
773 return "stopping";
774 }
775 return "?";
776}
777
778static ssize_t fill_registers_buffer(struct debug_buffer *buf)
779{
780 struct usb_hcd *hcd;
781 struct ehci_hcd *ehci;
782 unsigned long flags;
783 unsigned temp, size, i;
784 char *next, scratch [80];
785 static char fmt [] = "%*s\n";
786 static char label [] = "";
787
788 hcd = bus_to_hcd(buf->bus);
789 ehci = hcd_to_ehci (hcd);
790 next = buf->output_buf;
791 size = buf->alloc_size;
792
793 spin_lock_irqsave (&ehci->lock, flags);
794
795 if (!HCD_HW_ACCESSIBLE(hcd)) {
796 size = scnprintf (next, size,
797 "bus %s, device %s\n"
798 "%s\n"
799 "SUSPENDED (no register access)\n",
800 hcd->self.controller->bus->name,
801 dev_name(hcd->self.controller),
802 hcd->product_desc);
803 goto done;
804 }
805
806 /* Capability Registers */
807 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
808 temp = scnprintf (next, size,
809 "bus %s, device %s\n"
810 "%s\n"
811 "EHCI %x.%02x, rh state %s\n",
812 hcd->self.controller->bus->name,
813 dev_name(hcd->self.controller),
814 hcd->product_desc,
815 i >> 8, i & 0x0ff, rh_state_string(ehci));
816 size -= temp;
817 next += temp;
818
819#ifdef CONFIG_PCI
820 /* EHCI 0.96 and later may have "extended capabilities" */
821 if (dev_is_pci(hcd->self.controller)) {
822 struct pci_dev *pdev;
823 u32 offset, cap, cap2;
824 unsigned count = 256/4;
825
826 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
827 offset = HCC_EXT_CAPS(ehci_readl(ehci,
828 &ehci->caps->hcc_params));
829 while (offset && count--) {
830 pci_read_config_dword (pdev, offset, &cap);
831 switch (cap & 0xff) {
832 case 1:
833 temp = scnprintf (next, size,
834 "ownership %08x%s%s\n", cap,
835 (cap & (1 << 24)) ? " linux" : "",
836 (cap & (1 << 16)) ? " firmware" : "");
837 size -= temp;
838 next += temp;
839
840 offset += 4;
841 pci_read_config_dword (pdev, offset, &cap2);
842 temp = scnprintf (next, size,
843 "SMI sts/enable 0x%08x\n", cap2);
844 size -= temp;
845 next += temp;
846 break;
847 case 0: /* illegal reserved capability */
848 cap = 0;
849 /* FALLTHROUGH */
850 default: /* unknown */
851 break;
852 }
853 temp = (cap >> 8) & 0xff;
854 }
855 }
856#endif
857
858 // FIXME interpret both types of params
859 i = ehci_readl(ehci, &ehci->caps->hcs_params);
860 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
861 size -= temp;
862 next += temp;
863
864 i = ehci_readl(ehci, &ehci->caps->hcc_params);
865 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
866 size -= temp;
867 next += temp;
868
869 /* Operational Registers */
870 temp = dbg_status_buf (scratch, sizeof scratch, label,
871 ehci_readl(ehci, &ehci->regs->status));
872 temp = scnprintf (next, size, fmt, temp, scratch);
873 size -= temp;
874 next += temp;
875
876 temp = dbg_command_buf (scratch, sizeof scratch, label,
877 ehci_readl(ehci, &ehci->regs->command));
878 temp = scnprintf (next, size, fmt, temp, scratch);
879 size -= temp;
880 next += temp;
881
882 temp = dbg_intr_buf (scratch, sizeof scratch, label,
883 ehci_readl(ehci, &ehci->regs->intr_enable));
884 temp = scnprintf (next, size, fmt, temp, scratch);
885 size -= temp;
886 next += temp;
887
888 temp = scnprintf (next, size, "uframe %04x\n",
889 ehci_read_frame_index(ehci));
890 size -= temp;
891 next += temp;
892
893 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
894 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
895 ehci_readl(ehci,
896 &ehci->regs->port_status[i - 1]));
897 temp = scnprintf (next, size, fmt, temp, scratch);
898 size -= temp;
899 next += temp;
900 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
901 temp = scnprintf (next, size,
902 " debug control %08x\n",
903 ehci_readl(ehci,
904 &ehci->debug->control));
905 size -= temp;
906 next += temp;
907 }
908 }
909
910 if (!list_empty(&ehci->async_unlink)) {
911 temp = scnprintf(next, size, "async unlink qh %p\n",
912 list_first_entry(&ehci->async_unlink,
913 struct ehci_qh, unlink_node));
914 size -= temp;
915 next += temp;
916 }
917
918#ifdef EHCI_STATS
919 temp = scnprintf (next, size,
920 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
921 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
922 ehci->stats.lost_iaa);
923 size -= temp;
924 next += temp;
925
926 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
927 ehci->stats.complete, ehci->stats.unlink);
928 size -= temp;
929 next += temp;
930#endif
931
932done:
933 spin_unlock_irqrestore (&ehci->lock, flags);
934
935 return buf->alloc_size - size;
936}
937
938static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
939 ssize_t (*fill_func)(struct debug_buffer *))
940{
941 struct debug_buffer *buf;
942
943 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
944
945 if (buf) {
946 buf->bus = bus;
947 buf->fill_func = fill_func;
948 mutex_init(&buf->mutex);
949 buf->alloc_size = PAGE_SIZE;
950 }
951
952 return buf;
953}
954
955static int fill_buffer(struct debug_buffer *buf)
956{
957 int ret = 0;
958
959 if (!buf->output_buf)
960 buf->output_buf = vmalloc(buf->alloc_size);
961
962 if (!buf->output_buf) {
963 ret = -ENOMEM;
964 goto out;
965 }
966
967 ret = buf->fill_func(buf);
968
969 if (ret >= 0) {
970 buf->count = ret;
971 ret = 0;
972 }
973
974out:
975 return ret;
976}
977
978static ssize_t debug_output(struct file *file, char __user *user_buf,
979 size_t len, loff_t *offset)
980{
981 struct debug_buffer *buf = file->private_data;
982 int ret = 0;
983
984 mutex_lock(&buf->mutex);
985 if (buf->count == 0) {
986 ret = fill_buffer(buf);
987 if (ret != 0) {
988 mutex_unlock(&buf->mutex);
989 goto out;
990 }
991 }
992 mutex_unlock(&buf->mutex);
993
994 ret = simple_read_from_buffer(user_buf, len, offset,
995 buf->output_buf, buf->count);
996
997out:
998 return ret;
999
1000}
1001
1002static int debug_close(struct inode *inode, struct file *file)
1003{
1004 struct debug_buffer *buf = file->private_data;
1005
1006 if (buf) {
1007 vfree(buf->output_buf);
1008 kfree(buf);
1009 }
1010
1011 return 0;
1012}
1013
1014static int debug_async_open(struct inode *inode, struct file *file)
1015{
1016 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
1017
1018 return file->private_data ? 0 : -ENOMEM;
1019}
1020
1021static int debug_bandwidth_open(struct inode *inode, struct file *file)
1022{
1023 file->private_data = alloc_buffer(inode->i_private,
1024 fill_bandwidth_buffer);
1025
1026 return file->private_data ? 0 : -ENOMEM;
1027}
1028
1029static int debug_periodic_open(struct inode *inode, struct file *file)
1030{
1031 struct debug_buffer *buf;
1032 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
1033 if (!buf)
1034 return -ENOMEM;
1035
1036 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
1037 file->private_data = buf;
1038 return 0;
1039}
1040
1041static int debug_registers_open(struct inode *inode, struct file *file)
1042{
1043 file->private_data = alloc_buffer(inode->i_private,
1044 fill_registers_buffer);
1045
1046 return file->private_data ? 0 : -ENOMEM;
1047}
1048
1049static inline void create_debug_files (struct ehci_hcd *ehci)
1050{
1051 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1052
1053 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1054 if (!ehci->debug_dir)
1055 return;
1056
1057 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1058 &debug_async_fops))
1059 goto file_error;
1060
1061 if (!debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus,
1062 &debug_bandwidth_fops))
1063 goto file_error;
1064
1065 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1066 &debug_periodic_fops))
1067 goto file_error;
1068
1069 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1070 &debug_registers_fops))
1071 goto file_error;
1072
1073 return;
1074
1075file_error:
1076 debugfs_remove_recursive(ehci->debug_dir);
1077}
1078
1079static inline void remove_debug_files (struct ehci_hcd *ehci)
1080{
1081 debugfs_remove_recursive(ehci->debug_dir);
1082}
1083
1084#endif /* STUB_DEBUG_FILES */
1/*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19/* this file is part of ehci-hcd.c */
20
21#define ehci_dbg(ehci, fmt, args...) \
22 dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
23#define ehci_err(ehci, fmt, args...) \
24 dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
25#define ehci_info(ehci, fmt, args...) \
26 dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
27#define ehci_warn(ehci, fmt, args...) \
28 dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
29
30#ifdef VERBOSE_DEBUG
31# define ehci_vdbg ehci_dbg
32#else
33 static inline void ehci_vdbg(struct ehci_hcd *ehci, ...) {}
34#endif
35
36#ifdef DEBUG
37
38/* check the values in the HCSPARAMS register
39 * (host controller _Structural_ parameters)
40 * see EHCI spec, Table 2-4 for each value
41 */
42static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
43{
44 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
45
46 ehci_dbg (ehci,
47 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
48 label, params,
49 HCS_DEBUG_PORT (params),
50 HCS_INDICATOR (params) ? " ind" : "",
51 HCS_N_CC (params),
52 HCS_N_PCC (params),
53 HCS_PORTROUTED (params) ? "" : " ordered",
54 HCS_PPC (params) ? "" : " !ppc",
55 HCS_N_PORTS (params)
56 );
57 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
58 if (HCS_PORTROUTED (params)) {
59 int i;
60 char buf [46], tmp [7], byte;
61
62 buf[0] = 0;
63 for (i = 0; i < HCS_N_PORTS (params); i++) {
64 // FIXME MIPS won't readb() ...
65 byte = readb (&ehci->caps->portroute[(i>>1)]);
66 sprintf(tmp, "%d ",
67 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
68 strcat(buf, tmp);
69 }
70 ehci_dbg (ehci, "%s portroute %s\n",
71 label, buf);
72 }
73}
74#else
75
76static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
77
78#endif
79
80#ifdef DEBUG
81
82/* check the values in the HCCPARAMS register
83 * (host controller _Capability_ parameters)
84 * see EHCI Spec, Table 2-5 for each value
85 * */
86static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
87{
88 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
89
90 if (HCC_ISOC_CACHE (params)) {
91 ehci_dbg (ehci,
92 "%s hcc_params %04x caching frame %s%s%s\n",
93 label, params,
94 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
95 HCC_CANPARK(params) ? " park" : "",
96 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
97 } else {
98 ehci_dbg (ehci,
99 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
100 label,
101 params,
102 HCC_ISOC_THRES(params),
103 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
104 HCC_CANPARK(params) ? " park" : "",
105 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
106 HCC_LPM(params) ? " LPM" : "",
107 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
108 HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
109 HCC_32FRAME_PERIODIC_LIST(params) ?
110 " 32 periodic list" : "");
111 }
112}
113#else
114
115static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
116
117#endif
118
119#ifdef DEBUG
120
121static void __maybe_unused
122dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
123{
124 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
125 hc32_to_cpup(ehci, &qtd->hw_next),
126 hc32_to_cpup(ehci, &qtd->hw_alt_next),
127 hc32_to_cpup(ehci, &qtd->hw_token),
128 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
129 if (qtd->hw_buf [1])
130 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
131 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
132 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
133 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
134 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
135}
136
137static void __maybe_unused
138dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
139{
140 struct ehci_qh_hw *hw = qh->hw;
141
142 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
143 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
144 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
145}
146
147static void __maybe_unused
148dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
149{
150 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
151 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
152 itd->urb);
153 ehci_dbg (ehci,
154 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
155 hc32_to_cpu(ehci, itd->hw_transaction[0]),
156 hc32_to_cpu(ehci, itd->hw_transaction[1]),
157 hc32_to_cpu(ehci, itd->hw_transaction[2]),
158 hc32_to_cpu(ehci, itd->hw_transaction[3]),
159 hc32_to_cpu(ehci, itd->hw_transaction[4]),
160 hc32_to_cpu(ehci, itd->hw_transaction[5]),
161 hc32_to_cpu(ehci, itd->hw_transaction[6]),
162 hc32_to_cpu(ehci, itd->hw_transaction[7]));
163 ehci_dbg (ehci,
164 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
165 hc32_to_cpu(ehci, itd->hw_bufp[0]),
166 hc32_to_cpu(ehci, itd->hw_bufp[1]),
167 hc32_to_cpu(ehci, itd->hw_bufp[2]),
168 hc32_to_cpu(ehci, itd->hw_bufp[3]),
169 hc32_to_cpu(ehci, itd->hw_bufp[4]),
170 hc32_to_cpu(ehci, itd->hw_bufp[5]),
171 hc32_to_cpu(ehci, itd->hw_bufp[6]));
172 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
173 itd->index[0], itd->index[1], itd->index[2],
174 itd->index[3], itd->index[4], itd->index[5],
175 itd->index[6], itd->index[7]);
176}
177
178static void __maybe_unused
179dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
180{
181 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
182 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
183 sitd->urb);
184 ehci_dbg (ehci,
185 " addr %08x sched %04x result %08x buf %08x %08x\n",
186 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
187 hc32_to_cpu(ehci, sitd->hw_uframe),
188 hc32_to_cpu(ehci, sitd->hw_results),
189 hc32_to_cpu(ehci, sitd->hw_buf[0]),
190 hc32_to_cpu(ehci, sitd->hw_buf[1]));
191}
192
193static int __maybe_unused
194dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
195{
196 return scnprintf (buf, len,
197 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
198 label, label [0] ? " " : "", status,
199 (status & STS_PPCE_MASK) ? " PPCE" : "",
200 (status & STS_ASS) ? " Async" : "",
201 (status & STS_PSS) ? " Periodic" : "",
202 (status & STS_RECL) ? " Recl" : "",
203 (status & STS_HALT) ? " Halt" : "",
204 (status & STS_IAA) ? " IAA" : "",
205 (status & STS_FATAL) ? " FATAL" : "",
206 (status & STS_FLR) ? " FLR" : "",
207 (status & STS_PCD) ? " PCD" : "",
208 (status & STS_ERR) ? " ERR" : "",
209 (status & STS_INT) ? " INT" : ""
210 );
211}
212
213static int __maybe_unused
214dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
215{
216 return scnprintf (buf, len,
217 "%s%sintrenable %02x%s%s%s%s%s%s%s",
218 label, label [0] ? " " : "", enable,
219 (enable & STS_PPCE_MASK) ? " PPCE" : "",
220 (enable & STS_IAA) ? " IAA" : "",
221 (enable & STS_FATAL) ? " FATAL" : "",
222 (enable & STS_FLR) ? " FLR" : "",
223 (enable & STS_PCD) ? " PCD" : "",
224 (enable & STS_ERR) ? " ERR" : "",
225 (enable & STS_INT) ? " INT" : ""
226 );
227}
228
229static const char *const fls_strings [] =
230 { "1024", "512", "256", "??" };
231
232static int
233dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
234{
235 return scnprintf (buf, len,
236 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
237 "period=%s%s %s",
238 label, label [0] ? " " : "", command,
239 (command & CMD_HIRD) ? " HIRD" : "",
240 (command & CMD_PPCEE) ? " PPCEE" : "",
241 (command & CMD_FSP) ? " FSP" : "",
242 (command & CMD_ASPE) ? " ASPE" : "",
243 (command & CMD_PSPE) ? " PSPE" : "",
244 (command & CMD_PARK) ? " park" : "(park)",
245 CMD_PARK_CNT (command),
246 (command >> 16) & 0x3f,
247 (command & CMD_LRESET) ? " LReset" : "",
248 (command & CMD_IAAD) ? " IAAD" : "",
249 (command & CMD_ASE) ? " Async" : "",
250 (command & CMD_PSE) ? " Periodic" : "",
251 fls_strings [(command >> 2) & 0x3],
252 (command & CMD_RESET) ? " Reset" : "",
253 (command & CMD_RUN) ? "RUN" : "HALT"
254 );
255}
256
257static int
258dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
259{
260 char *sig;
261
262 /* signaling state */
263 switch (status & (3 << 10)) {
264 case 0 << 10: sig = "se0"; break;
265 case 1 << 10: sig = "k"; break; /* low speed */
266 case 2 << 10: sig = "j"; break;
267 default: sig = "?"; break;
268 }
269
270 return scnprintf (buf, len,
271 "%s%sport:%d status %06x %d %s%s%s%s%s%s "
272 "sig=%s%s%s%s%s%s%s%s%s%s%s",
273 label, label [0] ? " " : "", port, status,
274 status>>25,/*device address */
275 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ?
276 " ACK" : "",
277 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ?
278 " NYET" : "",
279 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ?
280 " STALL" : "",
281 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ?
282 " ERR" : "",
283 (status & PORT_POWER) ? " POWER" : "",
284 (status & PORT_OWNER) ? " OWNER" : "",
285 sig,
286 (status & PORT_LPM) ? " LPM" : "",
287 (status & PORT_RESET) ? " RESET" : "",
288 (status & PORT_SUSPEND) ? " SUSPEND" : "",
289 (status & PORT_RESUME) ? " RESUME" : "",
290 (status & PORT_OCC) ? " OCC" : "",
291 (status & PORT_OC) ? " OC" : "",
292 (status & PORT_PEC) ? " PEC" : "",
293 (status & PORT_PE) ? " PE" : "",
294 (status & PORT_CSC) ? " CSC" : "",
295 (status & PORT_CONNECT) ? " CONNECT" : "");
296}
297
298#else
299static inline void __maybe_unused
300dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
301{}
302
303static inline int __maybe_unused
304dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
305{ return 0; }
306
307static inline int __maybe_unused
308dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
309{ return 0; }
310
311static inline int __maybe_unused
312dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
313{ return 0; }
314
315static inline int __maybe_unused
316dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
317{ return 0; }
318
319#endif /* DEBUG */
320
321/* functions have the "wrong" filename when they're output... */
322#define dbg_status(ehci, label, status) { \
323 char _buf [80]; \
324 dbg_status_buf (_buf, sizeof _buf, label, status); \
325 ehci_dbg (ehci, "%s\n", _buf); \
326}
327
328#define dbg_cmd(ehci, label, command) { \
329 char _buf [80]; \
330 dbg_command_buf (_buf, sizeof _buf, label, command); \
331 ehci_dbg (ehci, "%s\n", _buf); \
332}
333
334#define dbg_port(ehci, label, port, status) { \
335 char _buf [80]; \
336 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
337 ehci_dbg (ehci, "%s\n", _buf); \
338}
339
340/*-------------------------------------------------------------------------*/
341
342#ifdef STUB_DEBUG_FILES
343
344static inline void create_debug_files (struct ehci_hcd *bus) { }
345static inline void remove_debug_files (struct ehci_hcd *bus) { }
346
347#else
348
349/* troubleshooting help: expose state in debugfs */
350
351static int debug_async_open(struct inode *, struct file *);
352static int debug_periodic_open(struct inode *, struct file *);
353static int debug_registers_open(struct inode *, struct file *);
354static int debug_async_open(struct inode *, struct file *);
355static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
356 size_t count, loff_t *ppos);
357static ssize_t debug_lpm_write(struct file *file, const char __user *buffer,
358 size_t count, loff_t *ppos);
359static int debug_lpm_close(struct inode *inode, struct file *file);
360
361static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
362static int debug_close(struct inode *, struct file *);
363
364static const struct file_operations debug_async_fops = {
365 .owner = THIS_MODULE,
366 .open = debug_async_open,
367 .read = debug_output,
368 .release = debug_close,
369 .llseek = default_llseek,
370};
371static const struct file_operations debug_periodic_fops = {
372 .owner = THIS_MODULE,
373 .open = debug_periodic_open,
374 .read = debug_output,
375 .release = debug_close,
376 .llseek = default_llseek,
377};
378static const struct file_operations debug_registers_fops = {
379 .owner = THIS_MODULE,
380 .open = debug_registers_open,
381 .read = debug_output,
382 .release = debug_close,
383 .llseek = default_llseek,
384};
385static const struct file_operations debug_lpm_fops = {
386 .owner = THIS_MODULE,
387 .open = simple_open,
388 .read = debug_lpm_read,
389 .write = debug_lpm_write,
390 .release = debug_lpm_close,
391 .llseek = noop_llseek,
392};
393
394static struct dentry *ehci_debug_root;
395
396struct debug_buffer {
397 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
398 struct usb_bus *bus;
399 struct mutex mutex; /* protect filling of buffer */
400 size_t count; /* number of characters filled into buffer */
401 char *output_buf;
402 size_t alloc_size;
403};
404
405#define speed_char(info1) ({ char tmp; \
406 switch (info1 & (3 << 12)) { \
407 case 0 << 12: tmp = 'f'; break; \
408 case 1 << 12: tmp = 'l'; break; \
409 case 2 << 12: tmp = 'h'; break; \
410 default: tmp = '?'; break; \
411 }; tmp; })
412
413static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
414{
415 __u32 v = hc32_to_cpu(ehci, token);
416
417 if (v & QTD_STS_ACTIVE)
418 return '*';
419 if (v & QTD_STS_HALT)
420 return '-';
421 if (!IS_SHORT_READ (v))
422 return ' ';
423 /* tries to advance through hw_alt_next */
424 return '/';
425}
426
427static void qh_lines (
428 struct ehci_hcd *ehci,
429 struct ehci_qh *qh,
430 char **nextp,
431 unsigned *sizep
432)
433{
434 u32 scratch;
435 u32 hw_curr;
436 struct list_head *entry;
437 struct ehci_qtd *td;
438 unsigned temp;
439 unsigned size = *sizep;
440 char *next = *nextp;
441 char mark;
442 __le32 list_end = EHCI_LIST_END(ehci);
443 struct ehci_qh_hw *hw = qh->hw;
444
445 if (hw->hw_qtd_next == list_end) /* NEC does this */
446 mark = '@';
447 else
448 mark = token_mark(ehci, hw->hw_token);
449 if (mark == '/') { /* qh_alt_next controls qh advance? */
450 if ((hw->hw_alt_next & QTD_MASK(ehci))
451 == ehci->async->hw->hw_alt_next)
452 mark = '#'; /* blocked */
453 else if (hw->hw_alt_next == list_end)
454 mark = '.'; /* use hw_qtd_next */
455 /* else alt_next points to some other qtd */
456 }
457 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
458 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
459 temp = scnprintf (next, size,
460 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
461 qh, scratch & 0x007f,
462 speed_char (scratch),
463 (scratch >> 8) & 0x000f,
464 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
465 hc32_to_cpup(ehci, &hw->hw_token), mark,
466 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
467 ? "data1" : "data0",
468 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
469 size -= temp;
470 next += temp;
471
472 /* hc may be modifying the list as we read it ... */
473 list_for_each (entry, &qh->qtd_list) {
474 td = list_entry (entry, struct ehci_qtd, qtd_list);
475 scratch = hc32_to_cpup(ehci, &td->hw_token);
476 mark = ' ';
477 if (hw_curr == td->qtd_dma)
478 mark = '*';
479 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
480 mark = '+';
481 else if (QTD_LENGTH (scratch)) {
482 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
483 mark = '#';
484 else if (td->hw_alt_next != list_end)
485 mark = '/';
486 }
487 temp = snprintf (next, size,
488 "\n\t%p%c%s len=%d %08x urb %p",
489 td, mark, ({ char *tmp;
490 switch ((scratch>>8)&0x03) {
491 case 0: tmp = "out"; break;
492 case 1: tmp = "in"; break;
493 case 2: tmp = "setup"; break;
494 default: tmp = "?"; break;
495 } tmp;}),
496 (scratch >> 16) & 0x7fff,
497 scratch,
498 td->urb);
499 if (size < temp)
500 temp = size;
501 size -= temp;
502 next += temp;
503 if (temp == size)
504 goto done;
505 }
506
507 temp = snprintf (next, size, "\n");
508 if (size < temp)
509 temp = size;
510 size -= temp;
511 next += temp;
512
513done:
514 *sizep = size;
515 *nextp = next;
516}
517
518static ssize_t fill_async_buffer(struct debug_buffer *buf)
519{
520 struct usb_hcd *hcd;
521 struct ehci_hcd *ehci;
522 unsigned long flags;
523 unsigned temp, size;
524 char *next;
525 struct ehci_qh *qh;
526
527 hcd = bus_to_hcd(buf->bus);
528 ehci = hcd_to_ehci (hcd);
529 next = buf->output_buf;
530 size = buf->alloc_size;
531
532 *next = 0;
533
534 /* dumps a snapshot of the async schedule.
535 * usually empty except for long-term bulk reads, or head.
536 * one QH per line, and TDs we know about
537 */
538 spin_lock_irqsave (&ehci->lock, flags);
539 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
540 qh_lines (ehci, qh, &next, &size);
541 if (ehci->reclaim && size > 0) {
542 temp = scnprintf (next, size, "\nreclaim =\n");
543 size -= temp;
544 next += temp;
545
546 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
547 qh_lines (ehci, qh, &next, &size);
548 }
549 spin_unlock_irqrestore (&ehci->lock, flags);
550
551 return strlen(buf->output_buf);
552}
553
554#define DBG_SCHED_LIMIT 64
555static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
556{
557 struct usb_hcd *hcd;
558 struct ehci_hcd *ehci;
559 unsigned long flags;
560 union ehci_shadow p, *seen;
561 unsigned temp, size, seen_count;
562 char *next;
563 unsigned i;
564 __hc32 tag;
565
566 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
567 return 0;
568 seen_count = 0;
569
570 hcd = bus_to_hcd(buf->bus);
571 ehci = hcd_to_ehci (hcd);
572 next = buf->output_buf;
573 size = buf->alloc_size;
574
575 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
576 size -= temp;
577 next += temp;
578
579 /* dump a snapshot of the periodic schedule.
580 * iso changes, interrupt usually doesn't.
581 */
582 spin_lock_irqsave (&ehci->lock, flags);
583 for (i = 0; i < ehci->periodic_size; i++) {
584 p = ehci->pshadow [i];
585 if (likely (!p.ptr))
586 continue;
587 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
588
589 temp = scnprintf (next, size, "%4d: ", i);
590 size -= temp;
591 next += temp;
592
593 do {
594 struct ehci_qh_hw *hw;
595
596 switch (hc32_to_cpu(ehci, tag)) {
597 case Q_TYPE_QH:
598 hw = p.qh->hw;
599 temp = scnprintf (next, size, " qh%d-%04x/%p",
600 p.qh->period,
601 hc32_to_cpup(ehci,
602 &hw->hw_info2)
603 /* uframe masks */
604 & (QH_CMASK | QH_SMASK),
605 p.qh);
606 size -= temp;
607 next += temp;
608 /* don't repeat what follows this qh */
609 for (temp = 0; temp < seen_count; temp++) {
610 if (seen [temp].ptr != p.ptr)
611 continue;
612 if (p.qh->qh_next.ptr) {
613 temp = scnprintf (next, size,
614 " ...");
615 size -= temp;
616 next += temp;
617 }
618 break;
619 }
620 /* show more info the first time around */
621 if (temp == seen_count) {
622 u32 scratch = hc32_to_cpup(ehci,
623 &hw->hw_info1);
624 struct ehci_qtd *qtd;
625 char *type = "";
626
627 /* count tds, get ep direction */
628 temp = 0;
629 list_for_each_entry (qtd,
630 &p.qh->qtd_list,
631 qtd_list) {
632 temp++;
633 switch (0x03 & (hc32_to_cpu(
634 ehci,
635 qtd->hw_token) >> 8)) {
636 case 0: type = "out"; continue;
637 case 1: type = "in"; continue;
638 }
639 }
640
641 temp = scnprintf (next, size,
642 " (%c%d ep%d%s "
643 "[%d/%d] q%d p%d)",
644 speed_char (scratch),
645 scratch & 0x007f,
646 (scratch >> 8) & 0x000f, type,
647 p.qh->usecs, p.qh->c_usecs,
648 temp,
649 0x7ff & (scratch >> 16));
650
651 if (seen_count < DBG_SCHED_LIMIT)
652 seen [seen_count++].qh = p.qh;
653 } else
654 temp = 0;
655 if (p.qh) {
656 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
657 p = p.qh->qh_next;
658 }
659 break;
660 case Q_TYPE_FSTN:
661 temp = scnprintf (next, size,
662 " fstn-%8x/%p", p.fstn->hw_prev,
663 p.fstn);
664 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
665 p = p.fstn->fstn_next;
666 break;
667 case Q_TYPE_ITD:
668 temp = scnprintf (next, size,
669 " itd/%p", p.itd);
670 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
671 p = p.itd->itd_next;
672 break;
673 case Q_TYPE_SITD:
674 temp = scnprintf (next, size,
675 " sitd%d-%04x/%p",
676 p.sitd->stream->interval,
677 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
678 & 0x0000ffff,
679 p.sitd);
680 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
681 p = p.sitd->sitd_next;
682 break;
683 }
684 size -= temp;
685 next += temp;
686 } while (p.ptr);
687
688 temp = scnprintf (next, size, "\n");
689 size -= temp;
690 next += temp;
691 }
692 spin_unlock_irqrestore (&ehci->lock, flags);
693 kfree (seen);
694
695 return buf->alloc_size - size;
696}
697#undef DBG_SCHED_LIMIT
698
699static const char *rh_state_string(struct ehci_hcd *ehci)
700{
701 switch (ehci->rh_state) {
702 case EHCI_RH_HALTED:
703 return "halted";
704 case EHCI_RH_SUSPENDED:
705 return "suspended";
706 case EHCI_RH_RUNNING:
707 return "running";
708 }
709 return "?";
710}
711
712static ssize_t fill_registers_buffer(struct debug_buffer *buf)
713{
714 struct usb_hcd *hcd;
715 struct ehci_hcd *ehci;
716 unsigned long flags;
717 unsigned temp, size, i;
718 char *next, scratch [80];
719 static char fmt [] = "%*s\n";
720 static char label [] = "";
721
722 hcd = bus_to_hcd(buf->bus);
723 ehci = hcd_to_ehci (hcd);
724 next = buf->output_buf;
725 size = buf->alloc_size;
726
727 spin_lock_irqsave (&ehci->lock, flags);
728
729 if (!HCD_HW_ACCESSIBLE(hcd)) {
730 size = scnprintf (next, size,
731 "bus %s, device %s\n"
732 "%s\n"
733 "SUSPENDED (no register access)\n",
734 hcd->self.controller->bus->name,
735 dev_name(hcd->self.controller),
736 hcd->product_desc);
737 goto done;
738 }
739
740 /* Capability Registers */
741 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
742 temp = scnprintf (next, size,
743 "bus %s, device %s\n"
744 "%s\n"
745 "EHCI %x.%02x, rh state %s\n",
746 hcd->self.controller->bus->name,
747 dev_name(hcd->self.controller),
748 hcd->product_desc,
749 i >> 8, i & 0x0ff, rh_state_string(ehci));
750 size -= temp;
751 next += temp;
752
753#ifdef CONFIG_PCI
754 /* EHCI 0.96 and later may have "extended capabilities" */
755 if (hcd->self.controller->bus == &pci_bus_type) {
756 struct pci_dev *pdev;
757 u32 offset, cap, cap2;
758 unsigned count = 256/4;
759
760 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
761 offset = HCC_EXT_CAPS(ehci_readl(ehci,
762 &ehci->caps->hcc_params));
763 while (offset && count--) {
764 pci_read_config_dword (pdev, offset, &cap);
765 switch (cap & 0xff) {
766 case 1:
767 temp = scnprintf (next, size,
768 "ownership %08x%s%s\n", cap,
769 (cap & (1 << 24)) ? " linux" : "",
770 (cap & (1 << 16)) ? " firmware" : "");
771 size -= temp;
772 next += temp;
773
774 offset += 4;
775 pci_read_config_dword (pdev, offset, &cap2);
776 temp = scnprintf (next, size,
777 "SMI sts/enable 0x%08x\n", cap2);
778 size -= temp;
779 next += temp;
780 break;
781 case 0: /* illegal reserved capability */
782 cap = 0;
783 /* FALLTHROUGH */
784 default: /* unknown */
785 break;
786 }
787 temp = (cap >> 8) & 0xff;
788 }
789 }
790#endif
791
792 // FIXME interpret both types of params
793 i = ehci_readl(ehci, &ehci->caps->hcs_params);
794 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
795 size -= temp;
796 next += temp;
797
798 i = ehci_readl(ehci, &ehci->caps->hcc_params);
799 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
800 size -= temp;
801 next += temp;
802
803 /* Operational Registers */
804 temp = dbg_status_buf (scratch, sizeof scratch, label,
805 ehci_readl(ehci, &ehci->regs->status));
806 temp = scnprintf (next, size, fmt, temp, scratch);
807 size -= temp;
808 next += temp;
809
810 temp = dbg_command_buf (scratch, sizeof scratch, label,
811 ehci_readl(ehci, &ehci->regs->command));
812 temp = scnprintf (next, size, fmt, temp, scratch);
813 size -= temp;
814 next += temp;
815
816 temp = dbg_intr_buf (scratch, sizeof scratch, label,
817 ehci_readl(ehci, &ehci->regs->intr_enable));
818 temp = scnprintf (next, size, fmt, temp, scratch);
819 size -= temp;
820 next += temp;
821
822 temp = scnprintf (next, size, "uframe %04x\n",
823 ehci_read_frame_index(ehci));
824 size -= temp;
825 next += temp;
826
827 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
828 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
829 ehci_readl(ehci,
830 &ehci->regs->port_status[i - 1]));
831 temp = scnprintf (next, size, fmt, temp, scratch);
832 size -= temp;
833 next += temp;
834 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
835 temp = scnprintf (next, size,
836 " debug control %08x\n",
837 ehci_readl(ehci,
838 &ehci->debug->control));
839 size -= temp;
840 next += temp;
841 }
842 }
843
844 if (ehci->reclaim) {
845 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
846 size -= temp;
847 next += temp;
848 }
849
850#ifdef EHCI_STATS
851 temp = scnprintf (next, size,
852 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
853 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
854 ehci->stats.lost_iaa);
855 size -= temp;
856 next += temp;
857
858 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
859 ehci->stats.complete, ehci->stats.unlink);
860 size -= temp;
861 next += temp;
862#endif
863
864done:
865 spin_unlock_irqrestore (&ehci->lock, flags);
866
867 return buf->alloc_size - size;
868}
869
870static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
871 ssize_t (*fill_func)(struct debug_buffer *))
872{
873 struct debug_buffer *buf;
874
875 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
876
877 if (buf) {
878 buf->bus = bus;
879 buf->fill_func = fill_func;
880 mutex_init(&buf->mutex);
881 buf->alloc_size = PAGE_SIZE;
882 }
883
884 return buf;
885}
886
887static int fill_buffer(struct debug_buffer *buf)
888{
889 int ret = 0;
890
891 if (!buf->output_buf)
892 buf->output_buf = vmalloc(buf->alloc_size);
893
894 if (!buf->output_buf) {
895 ret = -ENOMEM;
896 goto out;
897 }
898
899 ret = buf->fill_func(buf);
900
901 if (ret >= 0) {
902 buf->count = ret;
903 ret = 0;
904 }
905
906out:
907 return ret;
908}
909
910static ssize_t debug_output(struct file *file, char __user *user_buf,
911 size_t len, loff_t *offset)
912{
913 struct debug_buffer *buf = file->private_data;
914 int ret = 0;
915
916 mutex_lock(&buf->mutex);
917 if (buf->count == 0) {
918 ret = fill_buffer(buf);
919 if (ret != 0) {
920 mutex_unlock(&buf->mutex);
921 goto out;
922 }
923 }
924 mutex_unlock(&buf->mutex);
925
926 ret = simple_read_from_buffer(user_buf, len, offset,
927 buf->output_buf, buf->count);
928
929out:
930 return ret;
931
932}
933
934static int debug_close(struct inode *inode, struct file *file)
935{
936 struct debug_buffer *buf = file->private_data;
937
938 if (buf) {
939 vfree(buf->output_buf);
940 kfree(buf);
941 }
942
943 return 0;
944}
945static int debug_async_open(struct inode *inode, struct file *file)
946{
947 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
948
949 return file->private_data ? 0 : -ENOMEM;
950}
951
952static int debug_periodic_open(struct inode *inode, struct file *file)
953{
954 struct debug_buffer *buf;
955 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
956 if (!buf)
957 return -ENOMEM;
958
959 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
960 file->private_data = buf;
961 return 0;
962}
963
964static int debug_registers_open(struct inode *inode, struct file *file)
965{
966 file->private_data = alloc_buffer(inode->i_private,
967 fill_registers_buffer);
968
969 return file->private_data ? 0 : -ENOMEM;
970}
971
972static int debug_lpm_close(struct inode *inode, struct file *file)
973{
974 return 0;
975}
976
977static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
978 size_t count, loff_t *ppos)
979{
980 /* TODO: show lpm stats */
981 return 0;
982}
983
984static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
985 size_t count, loff_t *ppos)
986{
987 struct usb_hcd *hcd;
988 struct ehci_hcd *ehci;
989 char buf[50];
990 size_t len;
991 u32 temp;
992 unsigned long port;
993 u32 __iomem *portsc ;
994 u32 params;
995
996 hcd = bus_to_hcd(file->private_data);
997 ehci = hcd_to_ehci(hcd);
998
999 len = min(count, sizeof(buf) - 1);
1000 if (copy_from_user(buf, user_buf, len))
1001 return -EFAULT;
1002 buf[len] = '\0';
1003 if (len > 0 && buf[len - 1] == '\n')
1004 buf[len - 1] = '\0';
1005
1006 if (strncmp(buf, "enable", 5) == 0) {
1007 if (strict_strtoul(buf + 7, 10, &port))
1008 return -EINVAL;
1009 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1010 if (port > HCS_N_PORTS(params)) {
1011 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1012 return -ENODEV;
1013 }
1014 portsc = &ehci->regs->port_status[port-1];
1015 temp = ehci_readl(ehci, portsc);
1016 if (!(temp & PORT_DEV_ADDR)) {
1017 ehci_dbg(ehci, "LPM: no device attached\n");
1018 return -ENODEV;
1019 }
1020 temp |= PORT_LPM;
1021 ehci_writel(ehci, temp, portsc);
1022 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1023 } else if (strncmp(buf, "hird=", 5) == 0) {
1024 unsigned long hird;
1025 if (strict_strtoul(buf + 5, 16, &hird))
1026 return -EINVAL;
1027 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1028 ehci->command = (ehci->command & ~CMD_HIRD) | (hird << 24);
1029 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1030 } else if (strncmp(buf, "disable", 7) == 0) {
1031 if (strict_strtoul(buf + 8, 10, &port))
1032 return -EINVAL;
1033 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1034 if (port > HCS_N_PORTS(params)) {
1035 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1036 return -ENODEV;
1037 }
1038 portsc = &ehci->regs->port_status[port-1];
1039 temp = ehci_readl(ehci, portsc);
1040 if (!(temp & PORT_DEV_ADDR)) {
1041 ehci_dbg(ehci, "ERR: no device attached\n");
1042 return -ENODEV;
1043 }
1044 temp &= ~PORT_LPM;
1045 ehci_writel(ehci, temp, portsc);
1046 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1047 } else
1048 return -EOPNOTSUPP;
1049 return count;
1050}
1051
1052static inline void create_debug_files (struct ehci_hcd *ehci)
1053{
1054 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1055
1056 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1057 if (!ehci->debug_dir)
1058 return;
1059
1060 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1061 &debug_async_fops))
1062 goto file_error;
1063
1064 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1065 &debug_periodic_fops))
1066 goto file_error;
1067
1068 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1069 &debug_registers_fops))
1070 goto file_error;
1071
1072 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus,
1073 &debug_lpm_fops))
1074 goto file_error;
1075
1076 return;
1077
1078file_error:
1079 debugfs_remove_recursive(ehci->debug_dir);
1080}
1081
1082static inline void remove_debug_files (struct ehci_hcd *ehci)
1083{
1084 debugfs_remove_recursive(ehci->debug_dir);
1085}
1086
1087#endif /* STUB_DEBUG_FILES */