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[mirror_ubuntu-bionic-kernel.git] / drivers / usb / host / ehci-dbg.c
1 /*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* this file is part of ehci-hcd.c */
20
21 #if defined(DEBUG) || defined(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 */
27 static 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
61 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
62
63 #endif
64
65 #if defined(DEBUG) || defined(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 * */
71 static 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
100 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
101
102 #endif
103
104 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
105
106 static void __maybe_unused
107 dbg_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
122 static void __maybe_unused
123 dbg_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
132 static void __maybe_unused
133 dbg_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
163 static void __maybe_unused
164 dbg_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
178 static int __maybe_unused
179 dbg_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
198 static int __maybe_unused
199 dbg_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
214 static const char *const fls_strings [] =
215 { "1024", "512", "256", "??" };
216
217 static int
218 dbg_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
242 static int
243 dbg_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
284 static inline void __maybe_unused
285 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
286 {}
287
288 static inline int __maybe_unused
289 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
290 { return 0; }
291
292 static inline int __maybe_unused
293 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
294 { return 0; }
295
296 static inline int __maybe_unused
297 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
298 { return 0; }
299
300 static inline int __maybe_unused
301 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
302 { return 0; }
303
304 #endif /* DEBUG || 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
329 static inline void create_debug_files (struct ehci_hcd *bus) { }
330 static inline void remove_debug_files (struct ehci_hcd *bus) { }
331
332 #else
333
334 /* troubleshooting help: expose state in debugfs */
335
336 static int debug_async_open(struct inode *, struct file *);
337 static int debug_periodic_open(struct inode *, struct file *);
338 static int debug_registers_open(struct inode *, struct file *);
339
340 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
341 static int debug_close(struct inode *, struct file *);
342
343 static const struct file_operations debug_async_fops = {
344 .owner = THIS_MODULE,
345 .open = debug_async_open,
346 .read = debug_output,
347 .release = debug_close,
348 .llseek = default_llseek,
349 };
350 static const struct file_operations debug_periodic_fops = {
351 .owner = THIS_MODULE,
352 .open = debug_periodic_open,
353 .read = debug_output,
354 .release = debug_close,
355 .llseek = default_llseek,
356 };
357 static const struct file_operations debug_registers_fops = {
358 .owner = THIS_MODULE,
359 .open = debug_registers_open,
360 .read = debug_output,
361 .release = debug_close,
362 .llseek = default_llseek,
363 };
364
365 static struct dentry *ehci_debug_root;
366
367 struct debug_buffer {
368 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
369 struct usb_bus *bus;
370 struct mutex mutex; /* protect filling of buffer */
371 size_t count; /* number of characters filled into buffer */
372 char *output_buf;
373 size_t alloc_size;
374 };
375
376 #define speed_char(info1) ({ char tmp; \
377 switch (info1 & (3 << 12)) { \
378 case QH_FULL_SPEED: tmp = 'f'; break; \
379 case QH_LOW_SPEED: tmp = 'l'; break; \
380 case QH_HIGH_SPEED: tmp = 'h'; break; \
381 default: tmp = '?'; break; \
382 } tmp; })
383
384 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
385 {
386 __u32 v = hc32_to_cpu(ehci, token);
387
388 if (v & QTD_STS_ACTIVE)
389 return '*';
390 if (v & QTD_STS_HALT)
391 return '-';
392 if (!IS_SHORT_READ (v))
393 return ' ';
394 /* tries to advance through hw_alt_next */
395 return '/';
396 }
397
398 static void qh_lines (
399 struct ehci_hcd *ehci,
400 struct ehci_qh *qh,
401 char **nextp,
402 unsigned *sizep
403 )
404 {
405 u32 scratch;
406 u32 hw_curr;
407 struct list_head *entry;
408 struct ehci_qtd *td;
409 unsigned temp;
410 unsigned size = *sizep;
411 char *next = *nextp;
412 char mark;
413 __le32 list_end = EHCI_LIST_END(ehci);
414 struct ehci_qh_hw *hw = qh->hw;
415
416 if (hw->hw_qtd_next == list_end) /* NEC does this */
417 mark = '@';
418 else
419 mark = token_mark(ehci, hw->hw_token);
420 if (mark == '/') { /* qh_alt_next controls qh advance? */
421 if ((hw->hw_alt_next & QTD_MASK(ehci))
422 == ehci->async->hw->hw_alt_next)
423 mark = '#'; /* blocked */
424 else if (hw->hw_alt_next == list_end)
425 mark = '.'; /* use hw_qtd_next */
426 /* else alt_next points to some other qtd */
427 }
428 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
429 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
430 temp = scnprintf (next, size,
431 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
432 qh, scratch & 0x007f,
433 speed_char (scratch),
434 (scratch >> 8) & 0x000f,
435 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
436 hc32_to_cpup(ehci, &hw->hw_token), mark,
437 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
438 ? "data1" : "data0",
439 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
440 size -= temp;
441 next += temp;
442
443 /* hc may be modifying the list as we read it ... */
444 list_for_each (entry, &qh->qtd_list) {
445 td = list_entry (entry, struct ehci_qtd, qtd_list);
446 scratch = hc32_to_cpup(ehci, &td->hw_token);
447 mark = ' ';
448 if (hw_curr == td->qtd_dma)
449 mark = '*';
450 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
451 mark = '+';
452 else if (QTD_LENGTH (scratch)) {
453 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
454 mark = '#';
455 else if (td->hw_alt_next != list_end)
456 mark = '/';
457 }
458 temp = snprintf (next, size,
459 "\n\t%p%c%s len=%d %08x urb %p",
460 td, mark, ({ char *tmp;
461 switch ((scratch>>8)&0x03) {
462 case 0: tmp = "out"; break;
463 case 1: tmp = "in"; break;
464 case 2: tmp = "setup"; break;
465 default: tmp = "?"; break;
466 } tmp;}),
467 (scratch >> 16) & 0x7fff,
468 scratch,
469 td->urb);
470 if (size < temp)
471 temp = size;
472 size -= temp;
473 next += temp;
474 if (temp == size)
475 goto done;
476 }
477
478 temp = snprintf (next, size, "\n");
479 if (size < temp)
480 temp = size;
481 size -= temp;
482 next += temp;
483
484 done:
485 *sizep = size;
486 *nextp = next;
487 }
488
489 static ssize_t fill_async_buffer(struct debug_buffer *buf)
490 {
491 struct usb_hcd *hcd;
492 struct ehci_hcd *ehci;
493 unsigned long flags;
494 unsigned temp, size;
495 char *next;
496 struct ehci_qh *qh;
497
498 hcd = bus_to_hcd(buf->bus);
499 ehci = hcd_to_ehci (hcd);
500 next = buf->output_buf;
501 size = buf->alloc_size;
502
503 *next = 0;
504
505 /* dumps a snapshot of the async schedule.
506 * usually empty except for long-term bulk reads, or head.
507 * one QH per line, and TDs we know about
508 */
509 spin_lock_irqsave (&ehci->lock, flags);
510 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
511 qh_lines (ehci, qh, &next, &size);
512 if (!list_empty(&ehci->async_unlink) && size > 0) {
513 temp = scnprintf(next, size, "\nunlink =\n");
514 size -= temp;
515 next += temp;
516
517 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) {
518 if (size <= 0)
519 break;
520 qh_lines(ehci, qh, &next, &size);
521 }
522 }
523 spin_unlock_irqrestore (&ehci->lock, flags);
524
525 return strlen(buf->output_buf);
526 }
527
528 #define DBG_SCHED_LIMIT 64
529 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
530 {
531 struct usb_hcd *hcd;
532 struct ehci_hcd *ehci;
533 unsigned long flags;
534 union ehci_shadow p, *seen;
535 unsigned temp, size, seen_count;
536 char *next;
537 unsigned i;
538 __hc32 tag;
539
540 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
541 return 0;
542 seen_count = 0;
543
544 hcd = bus_to_hcd(buf->bus);
545 ehci = hcd_to_ehci (hcd);
546 next = buf->output_buf;
547 size = buf->alloc_size;
548
549 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
550 size -= temp;
551 next += temp;
552
553 /* dump a snapshot of the periodic schedule.
554 * iso changes, interrupt usually doesn't.
555 */
556 spin_lock_irqsave (&ehci->lock, flags);
557 for (i = 0; i < ehci->periodic_size; i++) {
558 p = ehci->pshadow [i];
559 if (likely (!p.ptr))
560 continue;
561 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
562
563 temp = scnprintf (next, size, "%4d: ", i);
564 size -= temp;
565 next += temp;
566
567 do {
568 struct ehci_qh_hw *hw;
569
570 switch (hc32_to_cpu(ehci, tag)) {
571 case Q_TYPE_QH:
572 hw = p.qh->hw;
573 temp = scnprintf (next, size, " qh%d-%04x/%p",
574 p.qh->period,
575 hc32_to_cpup(ehci,
576 &hw->hw_info2)
577 /* uframe masks */
578 & (QH_CMASK | QH_SMASK),
579 p.qh);
580 size -= temp;
581 next += temp;
582 /* don't repeat what follows this qh */
583 for (temp = 0; temp < seen_count; temp++) {
584 if (seen [temp].ptr != p.ptr)
585 continue;
586 if (p.qh->qh_next.ptr) {
587 temp = scnprintf (next, size,
588 " ...");
589 size -= temp;
590 next += temp;
591 }
592 break;
593 }
594 /* show more info the first time around */
595 if (temp == seen_count) {
596 u32 scratch = hc32_to_cpup(ehci,
597 &hw->hw_info1);
598 struct ehci_qtd *qtd;
599 char *type = "";
600
601 /* count tds, get ep direction */
602 temp = 0;
603 list_for_each_entry (qtd,
604 &p.qh->qtd_list,
605 qtd_list) {
606 temp++;
607 switch (0x03 & (hc32_to_cpu(
608 ehci,
609 qtd->hw_token) >> 8)) {
610 case 0: type = "out"; continue;
611 case 1: type = "in"; continue;
612 }
613 }
614
615 temp = scnprintf (next, size,
616 " (%c%d ep%d%s "
617 "[%d/%d] q%d p%d)",
618 speed_char (scratch),
619 scratch & 0x007f,
620 (scratch >> 8) & 0x000f, type,
621 p.qh->usecs, p.qh->c_usecs,
622 temp,
623 0x7ff & (scratch >> 16));
624
625 if (seen_count < DBG_SCHED_LIMIT)
626 seen [seen_count++].qh = p.qh;
627 } else
628 temp = 0;
629 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
630 p = p.qh->qh_next;
631 break;
632 case Q_TYPE_FSTN:
633 temp = scnprintf (next, size,
634 " fstn-%8x/%p", p.fstn->hw_prev,
635 p.fstn);
636 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
637 p = p.fstn->fstn_next;
638 break;
639 case Q_TYPE_ITD:
640 temp = scnprintf (next, size,
641 " itd/%p", p.itd);
642 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
643 p = p.itd->itd_next;
644 break;
645 case Q_TYPE_SITD:
646 temp = scnprintf (next, size,
647 " sitd%d-%04x/%p",
648 p.sitd->stream->interval,
649 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
650 & 0x0000ffff,
651 p.sitd);
652 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
653 p = p.sitd->sitd_next;
654 break;
655 }
656 size -= temp;
657 next += temp;
658 } while (p.ptr);
659
660 temp = scnprintf (next, size, "\n");
661 size -= temp;
662 next += temp;
663 }
664 spin_unlock_irqrestore (&ehci->lock, flags);
665 kfree (seen);
666
667 return buf->alloc_size - size;
668 }
669 #undef DBG_SCHED_LIMIT
670
671 static const char *rh_state_string(struct ehci_hcd *ehci)
672 {
673 switch (ehci->rh_state) {
674 case EHCI_RH_HALTED:
675 return "halted";
676 case EHCI_RH_SUSPENDED:
677 return "suspended";
678 case EHCI_RH_RUNNING:
679 return "running";
680 case EHCI_RH_STOPPING:
681 return "stopping";
682 }
683 return "?";
684 }
685
686 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
687 {
688 struct usb_hcd *hcd;
689 struct ehci_hcd *ehci;
690 unsigned long flags;
691 unsigned temp, size, i;
692 char *next, scratch [80];
693 static char fmt [] = "%*s\n";
694 static char label [] = "";
695
696 hcd = bus_to_hcd(buf->bus);
697 ehci = hcd_to_ehci (hcd);
698 next = buf->output_buf;
699 size = buf->alloc_size;
700
701 spin_lock_irqsave (&ehci->lock, flags);
702
703 if (!HCD_HW_ACCESSIBLE(hcd)) {
704 size = scnprintf (next, size,
705 "bus %s, device %s\n"
706 "%s\n"
707 "SUSPENDED (no register access)\n",
708 hcd->self.controller->bus->name,
709 dev_name(hcd->self.controller),
710 hcd->product_desc);
711 goto done;
712 }
713
714 /* Capability Registers */
715 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
716 temp = scnprintf (next, size,
717 "bus %s, device %s\n"
718 "%s\n"
719 "EHCI %x.%02x, rh state %s\n",
720 hcd->self.controller->bus->name,
721 dev_name(hcd->self.controller),
722 hcd->product_desc,
723 i >> 8, i & 0x0ff, rh_state_string(ehci));
724 size -= temp;
725 next += temp;
726
727 #ifdef CONFIG_PCI
728 /* EHCI 0.96 and later may have "extended capabilities" */
729 if (hcd->self.controller->bus == &pci_bus_type) {
730 struct pci_dev *pdev;
731 u32 offset, cap, cap2;
732 unsigned count = 256/4;
733
734 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
735 offset = HCC_EXT_CAPS(ehci_readl(ehci,
736 &ehci->caps->hcc_params));
737 while (offset && count--) {
738 pci_read_config_dword (pdev, offset, &cap);
739 switch (cap & 0xff) {
740 case 1:
741 temp = scnprintf (next, size,
742 "ownership %08x%s%s\n", cap,
743 (cap & (1 << 24)) ? " linux" : "",
744 (cap & (1 << 16)) ? " firmware" : "");
745 size -= temp;
746 next += temp;
747
748 offset += 4;
749 pci_read_config_dword (pdev, offset, &cap2);
750 temp = scnprintf (next, size,
751 "SMI sts/enable 0x%08x\n", cap2);
752 size -= temp;
753 next += temp;
754 break;
755 case 0: /* illegal reserved capability */
756 cap = 0;
757 /* FALLTHROUGH */
758 default: /* unknown */
759 break;
760 }
761 temp = (cap >> 8) & 0xff;
762 }
763 }
764 #endif
765
766 // FIXME interpret both types of params
767 i = ehci_readl(ehci, &ehci->caps->hcs_params);
768 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
769 size -= temp;
770 next += temp;
771
772 i = ehci_readl(ehci, &ehci->caps->hcc_params);
773 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
774 size -= temp;
775 next += temp;
776
777 /* Operational Registers */
778 temp = dbg_status_buf (scratch, sizeof scratch, label,
779 ehci_readl(ehci, &ehci->regs->status));
780 temp = scnprintf (next, size, fmt, temp, scratch);
781 size -= temp;
782 next += temp;
783
784 temp = dbg_command_buf (scratch, sizeof scratch, label,
785 ehci_readl(ehci, &ehci->regs->command));
786 temp = scnprintf (next, size, fmt, temp, scratch);
787 size -= temp;
788 next += temp;
789
790 temp = dbg_intr_buf (scratch, sizeof scratch, label,
791 ehci_readl(ehci, &ehci->regs->intr_enable));
792 temp = scnprintf (next, size, fmt, temp, scratch);
793 size -= temp;
794 next += temp;
795
796 temp = scnprintf (next, size, "uframe %04x\n",
797 ehci_read_frame_index(ehci));
798 size -= temp;
799 next += temp;
800
801 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
802 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
803 ehci_readl(ehci,
804 &ehci->regs->port_status[i - 1]));
805 temp = scnprintf (next, size, fmt, temp, scratch);
806 size -= temp;
807 next += temp;
808 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
809 temp = scnprintf (next, size,
810 " debug control %08x\n",
811 ehci_readl(ehci,
812 &ehci->debug->control));
813 size -= temp;
814 next += temp;
815 }
816 }
817
818 if (!list_empty(&ehci->async_unlink)) {
819 temp = scnprintf(next, size, "async unlink qh %p\n",
820 list_first_entry(&ehci->async_unlink,
821 struct ehci_qh, unlink_node));
822 size -= temp;
823 next += temp;
824 }
825
826 #ifdef EHCI_STATS
827 temp = scnprintf (next, size,
828 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
829 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
830 ehci->stats.lost_iaa);
831 size -= temp;
832 next += temp;
833
834 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
835 ehci->stats.complete, ehci->stats.unlink);
836 size -= temp;
837 next += temp;
838 #endif
839
840 done:
841 spin_unlock_irqrestore (&ehci->lock, flags);
842
843 return buf->alloc_size - size;
844 }
845
846 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
847 ssize_t (*fill_func)(struct debug_buffer *))
848 {
849 struct debug_buffer *buf;
850
851 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
852
853 if (buf) {
854 buf->bus = bus;
855 buf->fill_func = fill_func;
856 mutex_init(&buf->mutex);
857 buf->alloc_size = PAGE_SIZE;
858 }
859
860 return buf;
861 }
862
863 static int fill_buffer(struct debug_buffer *buf)
864 {
865 int ret = 0;
866
867 if (!buf->output_buf)
868 buf->output_buf = vmalloc(buf->alloc_size);
869
870 if (!buf->output_buf) {
871 ret = -ENOMEM;
872 goto out;
873 }
874
875 ret = buf->fill_func(buf);
876
877 if (ret >= 0) {
878 buf->count = ret;
879 ret = 0;
880 }
881
882 out:
883 return ret;
884 }
885
886 static ssize_t debug_output(struct file *file, char __user *user_buf,
887 size_t len, loff_t *offset)
888 {
889 struct debug_buffer *buf = file->private_data;
890 int ret = 0;
891
892 mutex_lock(&buf->mutex);
893 if (buf->count == 0) {
894 ret = fill_buffer(buf);
895 if (ret != 0) {
896 mutex_unlock(&buf->mutex);
897 goto out;
898 }
899 }
900 mutex_unlock(&buf->mutex);
901
902 ret = simple_read_from_buffer(user_buf, len, offset,
903 buf->output_buf, buf->count);
904
905 out:
906 return ret;
907
908 }
909
910 static int debug_close(struct inode *inode, struct file *file)
911 {
912 struct debug_buffer *buf = file->private_data;
913
914 if (buf) {
915 vfree(buf->output_buf);
916 kfree(buf);
917 }
918
919 return 0;
920 }
921 static int debug_async_open(struct inode *inode, struct file *file)
922 {
923 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
924
925 return file->private_data ? 0 : -ENOMEM;
926 }
927
928 static int debug_periodic_open(struct inode *inode, struct file *file)
929 {
930 struct debug_buffer *buf;
931 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
932 if (!buf)
933 return -ENOMEM;
934
935 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
936 file->private_data = buf;
937 return 0;
938 }
939
940 static int debug_registers_open(struct inode *inode, struct file *file)
941 {
942 file->private_data = alloc_buffer(inode->i_private,
943 fill_registers_buffer);
944
945 return file->private_data ? 0 : -ENOMEM;
946 }
947
948 static inline void create_debug_files (struct ehci_hcd *ehci)
949 {
950 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
951
952 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
953 if (!ehci->debug_dir)
954 return;
955
956 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
957 &debug_async_fops))
958 goto file_error;
959
960 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
961 &debug_periodic_fops))
962 goto file_error;
963
964 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
965 &debug_registers_fops))
966 goto file_error;
967
968 return;
969
970 file_error:
971 debugfs_remove_recursive(ehci->debug_dir);
972 }
973
974 static inline void remove_debug_files (struct ehci_hcd *ehci)
975 {
976 debugfs_remove_recursive(ehci->debug_dir);
977 }
978
979 #endif /* STUB_DEBUG_FILES */
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