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1/*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19/* this file is part of ehci-hcd.c */
20
21#define ehci_dbg(ehci, fmt, args...) \
22 dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
23#define ehci_err(ehci, fmt, args...) \
24 dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
25#define ehci_info(ehci, fmt, args...) \
26 dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
27#define ehci_warn(ehci, fmt, args...) \
28 dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
29
30#ifdef 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 peridic 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 int debug_lpm_open(struct inode *, struct file *);
356static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
357 size_t count, loff_t *ppos);
358static ssize_t debug_lpm_write(struct file *file, const char __user *buffer,
359 size_t count, loff_t *ppos);
360static int debug_lpm_close(struct inode *inode, struct file *file);
361
362static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
363static int debug_close(struct inode *, struct file *);
364
365static const struct file_operations debug_async_fops = {
366 .owner = THIS_MODULE,
367 .open = debug_async_open,
368 .read = debug_output,
369 .release = debug_close,
370 .llseek = default_llseek,
371};
372static const struct file_operations debug_periodic_fops = {
373 .owner = THIS_MODULE,
374 .open = debug_periodic_open,
375 .read = debug_output,
376 .release = debug_close,
377 .llseek = default_llseek,
378};
379static const struct file_operations debug_registers_fops = {
380 .owner = THIS_MODULE,
381 .open = debug_registers_open,
382 .read = debug_output,
383 .release = debug_close,
384 .llseek = default_llseek,
385};
386static const struct file_operations debug_lpm_fops = {
387 .owner = THIS_MODULE,
388 .open = debug_lpm_open,
389 .read = debug_lpm_read,
390 .write = debug_lpm_write,
391 .release = debug_lpm_close,
392 .llseek = noop_llseek,
393};
394
395static struct dentry *ehci_debug_root;
396
397struct debug_buffer {
398 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
399 struct usb_bus *bus;
400 struct mutex mutex; /* protect filling of buffer */
401 size_t count; /* number of characters filled into buffer */
402 char *output_buf;
403 size_t alloc_size;
404};
405
406#define speed_char(info1) ({ char tmp; \
407 switch (info1 & (3 << 12)) { \
408 case 0 << 12: tmp = 'f'; break; \
409 case 1 << 12: tmp = 'l'; break; \
410 case 2 << 12: tmp = 'h'; break; \
411 default: tmp = '?'; break; \
412 }; tmp; })
413
414static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
415{
416 __u32 v = hc32_to_cpu(ehci, token);
417
418 if (v & QTD_STS_ACTIVE)
419 return '*';
420 if (v & QTD_STS_HALT)
421 return '-';
422 if (!IS_SHORT_READ (v))
423 return ' ';
424 /* tries to advance through hw_alt_next */
425 return '/';
426}
427
428static void qh_lines (
429 struct ehci_hcd *ehci,
430 struct ehci_qh *qh,
431 char **nextp,
432 unsigned *sizep
433)
434{
435 u32 scratch;
436 u32 hw_curr;
437 struct list_head *entry;
438 struct ehci_qtd *td;
439 unsigned temp;
440 unsigned size = *sizep;
441 char *next = *nextp;
442 char mark;
443 __le32 list_end = EHCI_LIST_END(ehci);
444 struct ehci_qh_hw *hw = qh->hw;
445
446 if (hw->hw_qtd_next == list_end) /* NEC does this */
447 mark = '@';
448 else
449 mark = token_mark(ehci, hw->hw_token);
450 if (mark == '/') { /* qh_alt_next controls qh advance? */
451 if ((hw->hw_alt_next & QTD_MASK(ehci))
452 == ehci->async->hw->hw_alt_next)
453 mark = '#'; /* blocked */
454 else if (hw->hw_alt_next == list_end)
455 mark = '.'; /* use hw_qtd_next */
456 /* else alt_next points to some other qtd */
457 }
458 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
459 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
460 temp = scnprintf (next, size,
461 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
462 qh, scratch & 0x007f,
463 speed_char (scratch),
464 (scratch >> 8) & 0x000f,
465 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
466 hc32_to_cpup(ehci, &hw->hw_token), mark,
467 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
468 ? "data1" : "data0",
469 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
470 size -= temp;
471 next += temp;
472
473 /* hc may be modifying the list as we read it ... */
474 list_for_each (entry, &qh->qtd_list) {
475 td = list_entry (entry, struct ehci_qtd, qtd_list);
476 scratch = hc32_to_cpup(ehci, &td->hw_token);
477 mark = ' ';
478 if (hw_curr == td->qtd_dma)
479 mark = '*';
480 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
481 mark = '+';
482 else if (QTD_LENGTH (scratch)) {
483 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
484 mark = '#';
485 else if (td->hw_alt_next != list_end)
486 mark = '/';
487 }
488 temp = snprintf (next, size,
489 "\n\t%p%c%s len=%d %08x urb %p",
490 td, mark, ({ char *tmp;
491 switch ((scratch>>8)&0x03) {
492 case 0: tmp = "out"; break;
493 case 1: tmp = "in"; break;
494 case 2: tmp = "setup"; break;
495 default: tmp = "?"; break;
496 } tmp;}),
497 (scratch >> 16) & 0x7fff,
498 scratch,
499 td->urb);
500 if (size < temp)
501 temp = size;
502 size -= temp;
503 next += temp;
504 if (temp == size)
505 goto done;
506 }
507
508 temp = snprintf (next, size, "\n");
509 if (size < temp)
510 temp = size;
511 size -= temp;
512 next += temp;
513
514done:
515 *sizep = size;
516 *nextp = next;
517}
518
519static ssize_t fill_async_buffer(struct debug_buffer *buf)
520{
521 struct usb_hcd *hcd;
522 struct ehci_hcd *ehci;
523 unsigned long flags;
524 unsigned temp, size;
525 char *next;
526 struct ehci_qh *qh;
527
528 hcd = bus_to_hcd(buf->bus);
529 ehci = hcd_to_ehci (hcd);
530 next = buf->output_buf;
531 size = buf->alloc_size;
532
533 *next = 0;
534
535 /* dumps a snapshot of the async schedule.
536 * usually empty except for long-term bulk reads, or head.
537 * one QH per line, and TDs we know about
538 */
539 spin_lock_irqsave (&ehci->lock, flags);
540 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
541 qh_lines (ehci, qh, &next, &size);
542 if (ehci->reclaim && size > 0) {
543 temp = scnprintf (next, size, "\nreclaim =\n");
544 size -= temp;
545 next += temp;
546
547 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
548 qh_lines (ehci, qh, &next, &size);
549 }
550 spin_unlock_irqrestore (&ehci->lock, flags);
551
552 return strlen(buf->output_buf);
553}
554
555#define DBG_SCHED_LIMIT 64
556static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
557{
558 struct usb_hcd *hcd;
559 struct ehci_hcd *ehci;
560 unsigned long flags;
561 union ehci_shadow p, *seen;
562 unsigned temp, size, seen_count;
563 char *next;
564 unsigned i;
565 __hc32 tag;
566
567 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
568 return 0;
569 seen_count = 0;
570
571 hcd = bus_to_hcd(buf->bus);
572 ehci = hcd_to_ehci (hcd);
573 next = buf->output_buf;
574 size = buf->alloc_size;
575
576 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
577 size -= temp;
578 next += temp;
579
580 /* dump a snapshot of the periodic schedule.
581 * iso changes, interrupt usually doesn't.
582 */
583 spin_lock_irqsave (&ehci->lock, flags);
584 for (i = 0; i < ehci->periodic_size; i++) {
585 p = ehci->pshadow [i];
586 if (likely (!p.ptr))
587 continue;
588 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
589
590 temp = scnprintf (next, size, "%4d: ", i);
591 size -= temp;
592 next += temp;
593
594 do {
595 struct ehci_qh_hw *hw;
596
597 switch (hc32_to_cpu(ehci, tag)) {
598 case Q_TYPE_QH:
599 hw = p.qh->hw;
600 temp = scnprintf (next, size, " qh%d-%04x/%p",
601 p.qh->period,
602 hc32_to_cpup(ehci,
603 &hw->hw_info2)
604 /* uframe masks */
605 & (QH_CMASK | QH_SMASK),
606 p.qh);
607 size -= temp;
608 next += temp;
609 /* don't repeat what follows this qh */
610 for (temp = 0; temp < seen_count; temp++) {
611 if (seen [temp].ptr != p.ptr)
612 continue;
613 if (p.qh->qh_next.ptr) {
614 temp = scnprintf (next, size,
615 " ...");
616 size -= temp;
617 next += temp;
618 }
619 break;
620 }
621 /* show more info the first time around */
622 if (temp == seen_count) {
623 u32 scratch = hc32_to_cpup(ehci,
624 &hw->hw_info1);
625 struct ehci_qtd *qtd;
626 char *type = "";
627
628 /* count tds, get ep direction */
629 temp = 0;
630 list_for_each_entry (qtd,
631 &p.qh->qtd_list,
632 qtd_list) {
633 temp++;
634 switch (0x03 & (hc32_to_cpu(
635 ehci,
636 qtd->hw_token) >> 8)) {
637 case 0: type = "out"; continue;
638 case 1: type = "in"; continue;
639 }
640 }
641
642 temp = scnprintf (next, size,
643 " (%c%d ep%d%s "
644 "[%d/%d] q%d p%d)",
645 speed_char (scratch),
646 scratch & 0x007f,
647 (scratch >> 8) & 0x000f, type,
648 p.qh->usecs, p.qh->c_usecs,
649 temp,
650 0x7ff & (scratch >> 16));
651
652 if (seen_count < DBG_SCHED_LIMIT)
653 seen [seen_count++].qh = p.qh;
654 } else
655 temp = 0;
656 if (p.qh) {
657 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
658 p = p.qh->qh_next;
659 }
660 break;
661 case Q_TYPE_FSTN:
662 temp = scnprintf (next, size,
663 " fstn-%8x/%p", p.fstn->hw_prev,
664 p.fstn);
665 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
666 p = p.fstn->fstn_next;
667 break;
668 case Q_TYPE_ITD:
669 temp = scnprintf (next, size,
670 " itd/%p", p.itd);
671 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
672 p = p.itd->itd_next;
673 break;
674 case Q_TYPE_SITD:
675 temp = scnprintf (next, size,
676 " sitd%d-%04x/%p",
677 p.sitd->stream->interval,
678 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
679 & 0x0000ffff,
680 p.sitd);
681 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
682 p = p.sitd->sitd_next;
683 break;
684 }
685 size -= temp;
686 next += temp;
687 } while (p.ptr);
688
689 temp = scnprintf (next, size, "\n");
690 size -= temp;
691 next += temp;
692 }
693 spin_unlock_irqrestore (&ehci->lock, flags);
694 kfree (seen);
695
696 return buf->alloc_size - size;
697}
698#undef DBG_SCHED_LIMIT
699
700static ssize_t fill_registers_buffer(struct debug_buffer *buf)
701{
702 struct usb_hcd *hcd;
703 struct ehci_hcd *ehci;
704 unsigned long flags;
705 unsigned temp, size, i;
706 char *next, scratch [80];
707 static char fmt [] = "%*s\n";
708 static char label [] = "";
709
710 hcd = bus_to_hcd(buf->bus);
711 ehci = hcd_to_ehci (hcd);
712 next = buf->output_buf;
713 size = buf->alloc_size;
714
715 spin_lock_irqsave (&ehci->lock, flags);
716
717 if (!HCD_HW_ACCESSIBLE(hcd)) {
718 size = scnprintf (next, size,
719 "bus %s, device %s\n"
720 "%s\n"
721 "SUSPENDED (no register access)\n",
722 hcd->self.controller->bus->name,
723 dev_name(hcd->self.controller),
724 hcd->product_desc);
725 goto done;
726 }
727
728 /* Capability Registers */
729 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
730 temp = scnprintf (next, size,
731 "bus %s, device %s\n"
732 "%s\n"
733 "EHCI %x.%02x, hcd state %d\n",
734 hcd->self.controller->bus->name,
735 dev_name(hcd->self.controller),
736 hcd->product_desc,
737 i >> 8, i & 0x0ff, hcd->state);
738 size -= temp;
739 next += temp;
740
741#ifdef CONFIG_PCI
742 /* EHCI 0.96 and later may have "extended capabilities" */
743 if (hcd->self.controller->bus == &pci_bus_type) {
744 struct pci_dev *pdev;
745 u32 offset, cap, cap2;
746 unsigned count = 256/4;
747
748 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
749 offset = HCC_EXT_CAPS(ehci_readl(ehci,
750 &ehci->caps->hcc_params));
751 while (offset && count--) {
752 pci_read_config_dword (pdev, offset, &cap);
753 switch (cap & 0xff) {
754 case 1:
755 temp = scnprintf (next, size,
756 "ownership %08x%s%s\n", cap,
757 (cap & (1 << 24)) ? " linux" : "",
758 (cap & (1 << 16)) ? " firmware" : "");
759 size -= temp;
760 next += temp;
761
762 offset += 4;
763 pci_read_config_dword (pdev, offset, &cap2);
764 temp = scnprintf (next, size,
765 "SMI sts/enable 0x%08x\n", cap2);
766 size -= temp;
767 next += temp;
768 break;
769 case 0: /* illegal reserved capability */
770 cap = 0;
771 /* FALLTHROUGH */
772 default: /* unknown */
773 break;
774 }
775 temp = (cap >> 8) & 0xff;
776 }
777 }
778#endif
779
780 // FIXME interpret both types of params
781 i = ehci_readl(ehci, &ehci->caps->hcs_params);
782 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
783 size -= temp;
784 next += temp;
785
786 i = ehci_readl(ehci, &ehci->caps->hcc_params);
787 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
788 size -= temp;
789 next += temp;
790
791 /* Operational Registers */
792 temp = dbg_status_buf (scratch, sizeof scratch, label,
793 ehci_readl(ehci, &ehci->regs->status));
794 temp = scnprintf (next, size, fmt, temp, scratch);
795 size -= temp;
796 next += temp;
797
798 temp = dbg_command_buf (scratch, sizeof scratch, label,
799 ehci_readl(ehci, &ehci->regs->command));
800 temp = scnprintf (next, size, fmt, temp, scratch);
801 size -= temp;
802 next += temp;
803
804 temp = dbg_intr_buf (scratch, sizeof scratch, label,
805 ehci_readl(ehci, &ehci->regs->intr_enable));
806 temp = scnprintf (next, size, fmt, temp, scratch);
807 size -= temp;
808 next += temp;
809
810 temp = scnprintf (next, size, "uframe %04x\n",
811 ehci_readl(ehci, &ehci->regs->frame_index));
812 size -= temp;
813 next += temp;
814
815 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
816 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
817 ehci_readl(ehci,
818 &ehci->regs->port_status[i - 1]));
819 temp = scnprintf (next, size, fmt, temp, scratch);
820 size -= temp;
821 next += temp;
822 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
823 temp = scnprintf (next, size,
824 " debug control %08x\n",
825 ehci_readl(ehci,
826 &ehci->debug->control));
827 size -= temp;
828 next += temp;
829 }
830 }
831
832 if (ehci->reclaim) {
833 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
834 size -= temp;
835 next += temp;
836 }
837
838#ifdef EHCI_STATS
839 temp = scnprintf (next, size,
840 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
841 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
842 ehci->stats.lost_iaa);
843 size -= temp;
844 next += temp;
845
846 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
847 ehci->stats.complete, ehci->stats.unlink);
848 size -= temp;
849 next += temp;
850#endif
851
852done:
853 spin_unlock_irqrestore (&ehci->lock, flags);
854
855 return buf->alloc_size - size;
856}
857
858static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
859 ssize_t (*fill_func)(struct debug_buffer *))
860{
861 struct debug_buffer *buf;
862
863 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
864
865 if (buf) {
866 buf->bus = bus;
867 buf->fill_func = fill_func;
868 mutex_init(&buf->mutex);
869 buf->alloc_size = PAGE_SIZE;
870 }
871
872 return buf;
873}
874
875static int fill_buffer(struct debug_buffer *buf)
876{
877 int ret = 0;
878
879 if (!buf->output_buf)
880 buf->output_buf = vmalloc(buf->alloc_size);
881
882 if (!buf->output_buf) {
883 ret = -ENOMEM;
884 goto out;
885 }
886
887 ret = buf->fill_func(buf);
888
889 if (ret >= 0) {
890 buf->count = ret;
891 ret = 0;
892 }
893
894out:
895 return ret;
896}
897
898static ssize_t debug_output(struct file *file, char __user *user_buf,
899 size_t len, loff_t *offset)
900{
901 struct debug_buffer *buf = file->private_data;
902 int ret = 0;
903
904 mutex_lock(&buf->mutex);
905 if (buf->count == 0) {
906 ret = fill_buffer(buf);
907 if (ret != 0) {
908 mutex_unlock(&buf->mutex);
909 goto out;
910 }
911 }
912 mutex_unlock(&buf->mutex);
913
914 ret = simple_read_from_buffer(user_buf, len, offset,
915 buf->output_buf, buf->count);
916
917out:
918 return ret;
919
920}
921
922static int debug_close(struct inode *inode, struct file *file)
923{
924 struct debug_buffer *buf = file->private_data;
925
926 if (buf) {
927 vfree(buf->output_buf);
928 kfree(buf);
929 }
930
931 return 0;
932}
933static int debug_async_open(struct inode *inode, struct file *file)
934{
935 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
936
937 return file->private_data ? 0 : -ENOMEM;
938}
939
940static int debug_periodic_open(struct inode *inode, struct file *file)
941{
942 struct debug_buffer *buf;
943 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
944 if (!buf)
945 return -ENOMEM;
946
947 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
948 file->private_data = buf;
949 return 0;
950}
951
952static int debug_registers_open(struct inode *inode, struct file *file)
953{
954 file->private_data = alloc_buffer(inode->i_private,
955 fill_registers_buffer);
956
957 return file->private_data ? 0 : -ENOMEM;
958}
959
960static int debug_lpm_open(struct inode *inode, struct file *file)
961{
962 file->private_data = inode->i_private;
963 return 0;
964}
965
966static int debug_lpm_close(struct inode *inode, struct file *file)
967{
968 return 0;
969}
970
971static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
972 size_t count, loff_t *ppos)
973{
974 /* TODO: show lpm stats */
975 return 0;
976}
977
978static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
979 size_t count, loff_t *ppos)
980{
981 struct usb_hcd *hcd;
982 struct ehci_hcd *ehci;
983 char buf[50];
984 size_t len;
985 u32 temp;
986 unsigned long port;
987 u32 __iomem *portsc ;
988 u32 params;
989
990 hcd = bus_to_hcd(file->private_data);
991 ehci = hcd_to_ehci(hcd);
992
993 len = min(count, sizeof(buf) - 1);
994 if (copy_from_user(buf, user_buf, len))
995 return -EFAULT;
996 buf[len] = '\0';
997 if (len > 0 && buf[len - 1] == '\n')
998 buf[len - 1] = '\0';
999
1000 if (strncmp(buf, "enable", 5) == 0) {
1001 if (strict_strtoul(buf + 7, 10, &port))
1002 return -EINVAL;
1003 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1004 if (port > HCS_N_PORTS(params)) {
1005 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1006 return -ENODEV;
1007 }
1008 portsc = &ehci->regs->port_status[port-1];
1009 temp = ehci_readl(ehci, portsc);
1010 if (!(temp & PORT_DEV_ADDR)) {
1011 ehci_dbg(ehci, "LPM: no device attached\n");
1012 return -ENODEV;
1013 }
1014 temp |= PORT_LPM;
1015 ehci_writel(ehci, temp, portsc);
1016 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1017 } else if (strncmp(buf, "hird=", 5) == 0) {
1018 unsigned long hird;
1019 if (strict_strtoul(buf + 5, 16, &hird))
1020 return -EINVAL;
1021 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1022 temp = ehci_readl(ehci, &ehci->regs->command);
1023 temp &= ~CMD_HIRD;
1024 temp |= hird << 24;
1025 ehci_writel(ehci, temp, &ehci->regs->command);
1026 } else if (strncmp(buf, "disable", 7) == 0) {
1027 if (strict_strtoul(buf + 8, 10, &port))
1028 return -EINVAL;
1029 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1030 if (port > HCS_N_PORTS(params)) {
1031 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1032 return -ENODEV;
1033 }
1034 portsc = &ehci->regs->port_status[port-1];
1035 temp = ehci_readl(ehci, portsc);
1036 if (!(temp & PORT_DEV_ADDR)) {
1037 ehci_dbg(ehci, "ERR: no device attached\n");
1038 return -ENODEV;
1039 }
1040 temp &= ~PORT_LPM;
1041 ehci_writel(ehci, temp, portsc);
1042 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1043 } else
1044 return -EOPNOTSUPP;
1045 return count;
1046}
1047
1048static inline void create_debug_files (struct ehci_hcd *ehci)
1049{
1050 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1051
1052 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1053 if (!ehci->debug_dir)
1054 return;
1055
1056 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1057 &debug_async_fops))
1058 goto file_error;
1059
1060 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1061 &debug_periodic_fops))
1062 goto file_error;
1063
1064 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1065 &debug_registers_fops))
1066 goto file_error;
1067
1068 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus,
1069 &debug_lpm_fops))
1070 goto file_error;
1071
1072 return;
1073
1074file_error:
1075 debugfs_remove_recursive(ehci->debug_dir);
1076}
1077
1078static inline void remove_debug_files (struct ehci_hcd *ehci)
1079{
1080 debugfs_remove_recursive(ehci->debug_dir);
1081}
1082
1083#endif /* STUB_DEBUG_FILES */
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (c) 2001-2002 by David Brownell
4 */
5
6/* this file is part of ehci-hcd.c */
7
8#ifdef CONFIG_DYNAMIC_DEBUG
9
10/*
11 * check the values in the HCSPARAMS register
12 * (host controller _Structural_ parameters)
13 * see EHCI spec, Table 2-4 for each value
14 */
15static void dbg_hcs_params(struct ehci_hcd *ehci, char *label)
16{
17 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
18
19 ehci_dbg(ehci,
20 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
21 label, params,
22 HCS_DEBUG_PORT(params),
23 HCS_INDICATOR(params) ? " ind" : "",
24 HCS_N_CC(params),
25 HCS_N_PCC(params),
26 HCS_PORTROUTED(params) ? "" : " ordered",
27 HCS_PPC(params) ? "" : " !ppc",
28 HCS_N_PORTS(params));
29 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
30 if (HCS_PORTROUTED(params)) {
31 int i;
32 char buf[46], tmp[7], byte;
33
34 buf[0] = 0;
35 for (i = 0; i < HCS_N_PORTS(params); i++) {
36 /* FIXME MIPS won't readb() ... */
37 byte = readb(&ehci->caps->portroute[(i >> 1)]);
38 sprintf(tmp, "%d ",
39 (i & 0x1) ? byte & 0xf : (byte >> 4) & 0xf);
40 strcat(buf, tmp);
41 }
42 ehci_dbg(ehci, "%s portroute %s\n", label, buf);
43 }
44}
45
46/*
47 * check the values in the HCCPARAMS register
48 * (host controller _Capability_ parameters)
49 * see EHCI Spec, Table 2-5 for each value
50 */
51static void dbg_hcc_params(struct ehci_hcd *ehci, char *label)
52{
53 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
54
55 if (HCC_ISOC_CACHE(params)) {
56 ehci_dbg(ehci,
57 "%s hcc_params %04x caching frame %s%s%s\n",
58 label, params,
59 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
60 HCC_CANPARK(params) ? " park" : "",
61 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
62 } else {
63 ehci_dbg(ehci,
64 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
65 label,
66 params,
67 HCC_ISOC_THRES(params),
68 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
69 HCC_CANPARK(params) ? " park" : "",
70 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
71 HCC_LPM(params) ? " LPM" : "",
72 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
73 HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
74 HCC_32FRAME_PERIODIC_LIST(params) ?
75 " 32 periodic list" : "");
76 }
77}
78
79static void __maybe_unused
80dbg_qtd(const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
81{
82 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
83 hc32_to_cpup(ehci, &qtd->hw_next),
84 hc32_to_cpup(ehci, &qtd->hw_alt_next),
85 hc32_to_cpup(ehci, &qtd->hw_token),
86 hc32_to_cpup(ehci, &qtd->hw_buf[0]));
87 if (qtd->hw_buf[1])
88 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
89 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
90 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
91 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
92 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
93}
94
95static void __maybe_unused
96dbg_qh(const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
97{
98 struct ehci_qh_hw *hw = qh->hw;
99
100 ehci_dbg(ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
101 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
102 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
103}
104
105static void __maybe_unused
106dbg_itd(const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
107{
108 ehci_dbg(ehci, "%s [%d] itd %p, next %08x, urb %p\n",
109 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
110 itd->urb);
111 ehci_dbg(ehci,
112 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
113 hc32_to_cpu(ehci, itd->hw_transaction[0]),
114 hc32_to_cpu(ehci, itd->hw_transaction[1]),
115 hc32_to_cpu(ehci, itd->hw_transaction[2]),
116 hc32_to_cpu(ehci, itd->hw_transaction[3]),
117 hc32_to_cpu(ehci, itd->hw_transaction[4]),
118 hc32_to_cpu(ehci, itd->hw_transaction[5]),
119 hc32_to_cpu(ehci, itd->hw_transaction[6]),
120 hc32_to_cpu(ehci, itd->hw_transaction[7]));
121 ehci_dbg(ehci,
122 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
123 hc32_to_cpu(ehci, itd->hw_bufp[0]),
124 hc32_to_cpu(ehci, itd->hw_bufp[1]),
125 hc32_to_cpu(ehci, itd->hw_bufp[2]),
126 hc32_to_cpu(ehci, itd->hw_bufp[3]),
127 hc32_to_cpu(ehci, itd->hw_bufp[4]),
128 hc32_to_cpu(ehci, itd->hw_bufp[5]),
129 hc32_to_cpu(ehci, itd->hw_bufp[6]));
130 ehci_dbg(ehci, " index: %d %d %d %d %d %d %d %d\n",
131 itd->index[0], itd->index[1], itd->index[2],
132 itd->index[3], itd->index[4], itd->index[5],
133 itd->index[6], itd->index[7]);
134}
135
136static void __maybe_unused
137dbg_sitd(const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
138{
139 ehci_dbg(ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
140 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
141 sitd->urb);
142 ehci_dbg(ehci,
143 " addr %08x sched %04x result %08x buf %08x %08x\n",
144 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
145 hc32_to_cpu(ehci, sitd->hw_uframe),
146 hc32_to_cpu(ehci, sitd->hw_results),
147 hc32_to_cpu(ehci, sitd->hw_buf[0]),
148 hc32_to_cpu(ehci, sitd->hw_buf[1]));
149}
150
151static int __maybe_unused
152dbg_status_buf(char *buf, unsigned len, const char *label, u32 status)
153{
154 return scnprintf(buf, len,
155 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
156 label, label[0] ? " " : "", status,
157 (status & STS_PPCE_MASK) ? " PPCE" : "",
158 (status & STS_ASS) ? " Async" : "",
159 (status & STS_PSS) ? " Periodic" : "",
160 (status & STS_RECL) ? " Recl" : "",
161 (status & STS_HALT) ? " Halt" : "",
162 (status & STS_IAA) ? " IAA" : "",
163 (status & STS_FATAL) ? " FATAL" : "",
164 (status & STS_FLR) ? " FLR" : "",
165 (status & STS_PCD) ? " PCD" : "",
166 (status & STS_ERR) ? " ERR" : "",
167 (status & STS_INT) ? " INT" : "");
168}
169
170static int __maybe_unused
171dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable)
172{
173 return scnprintf(buf, len,
174 "%s%sintrenable %02x%s%s%s%s%s%s%s",
175 label, label[0] ? " " : "", enable,
176 (enable & STS_PPCE_MASK) ? " PPCE" : "",
177 (enable & STS_IAA) ? " IAA" : "",
178 (enable & STS_FATAL) ? " FATAL" : "",
179 (enable & STS_FLR) ? " FLR" : "",
180 (enable & STS_PCD) ? " PCD" : "",
181 (enable & STS_ERR) ? " ERR" : "",
182 (enable & STS_INT) ? " INT" : "");
183}
184
185static const char *const fls_strings[] = { "1024", "512", "256", "??" };
186
187static int
188dbg_command_buf(char *buf, unsigned len, const char *label, u32 command)
189{
190 return scnprintf(buf, len,
191 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
192 "period=%s%s %s",
193 label, label[0] ? " " : "", command,
194 (command & CMD_HIRD) ? " HIRD" : "",
195 (command & CMD_PPCEE) ? " PPCEE" : "",
196 (command & CMD_FSP) ? " FSP" : "",
197 (command & CMD_ASPE) ? " ASPE" : "",
198 (command & CMD_PSPE) ? " PSPE" : "",
199 (command & CMD_PARK) ? " park" : "(park)",
200 CMD_PARK_CNT(command),
201 (command >> 16) & 0x3f,
202 (command & CMD_LRESET) ? " LReset" : "",
203 (command & CMD_IAAD) ? " IAAD" : "",
204 (command & CMD_ASE) ? " Async" : "",
205 (command & CMD_PSE) ? " Periodic" : "",
206 fls_strings[(command >> 2) & 0x3],
207 (command & CMD_RESET) ? " Reset" : "",
208 (command & CMD_RUN) ? "RUN" : "HALT");
209}
210
211static int
212dbg_port_buf(char *buf, unsigned len, const char *label, int port, u32 status)
213{
214 char *sig;
215
216 /* signaling state */
217 switch (status & (3 << 10)) {
218 case 0 << 10:
219 sig = "se0";
220 break;
221 case 1 << 10: /* low speed */
222 sig = "k";
223 break;
224 case 2 << 10:
225 sig = "j";
226 break;
227 default:
228 sig = "?";
229 break;
230 }
231
232 return scnprintf(buf, len,
233 "%s%sport:%d status %06x %d %s%s%s%s%s%s "
234 "sig=%s%s%s%s%s%s%s%s%s%s%s",
235 label, label[0] ? " " : "", port, status,
236 status >> 25, /*device address */
237 (status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_ACK ?
238 " ACK" : "",
239 (status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_NYET ?
240 " NYET" : "",
241 (status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_STALL ?
242 " STALL" : "",
243 (status & PORT_SSTS) >> 23 == PORTSC_SUSPEND_STS_ERR ?
244 " ERR" : "",
245 (status & PORT_POWER) ? " POWER" : "",
246 (status & PORT_OWNER) ? " OWNER" : "",
247 sig,
248 (status & PORT_LPM) ? " LPM" : "",
249 (status & PORT_RESET) ? " RESET" : "",
250 (status & PORT_SUSPEND) ? " SUSPEND" : "",
251 (status & PORT_RESUME) ? " RESUME" : "",
252 (status & PORT_OCC) ? " OCC" : "",
253 (status & PORT_OC) ? " OC" : "",
254 (status & PORT_PEC) ? " PEC" : "",
255 (status & PORT_PE) ? " PE" : "",
256 (status & PORT_CSC) ? " CSC" : "",
257 (status & PORT_CONNECT) ? " CONNECT" : "");
258}
259
260static inline void
261dbg_status(struct ehci_hcd *ehci, const char *label, u32 status)
262{
263 char buf[80];
264
265 dbg_status_buf(buf, sizeof(buf), label, status);
266 ehci_dbg(ehci, "%s\n", buf);
267}
268
269static inline void
270dbg_cmd(struct ehci_hcd *ehci, const char *label, u32 command)
271{
272 char buf[80];
273
274 dbg_command_buf(buf, sizeof(buf), label, command);
275 ehci_dbg(ehci, "%s\n", buf);
276}
277
278static inline void
279dbg_port(struct ehci_hcd *ehci, const char *label, int port, u32 status)
280{
281 char buf[80];
282
283 dbg_port_buf(buf, sizeof(buf), label, port, status);
284 ehci_dbg(ehci, "%s\n", buf);
285}
286
287/*-------------------------------------------------------------------------*/
288
289/* troubleshooting help: expose state in debugfs */
290
291static int debug_async_open(struct inode *, struct file *);
292static int debug_bandwidth_open(struct inode *, struct file *);
293static int debug_periodic_open(struct inode *, struct file *);
294static int debug_registers_open(struct inode *, struct file *);
295
296static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
297static int debug_close(struct inode *, struct file *);
298
299static const struct file_operations debug_async_fops = {
300 .owner = THIS_MODULE,
301 .open = debug_async_open,
302 .read = debug_output,
303 .release = debug_close,
304 .llseek = default_llseek,
305};
306
307static const struct file_operations debug_bandwidth_fops = {
308 .owner = THIS_MODULE,
309 .open = debug_bandwidth_open,
310 .read = debug_output,
311 .release = debug_close,
312 .llseek = default_llseek,
313};
314
315static const struct file_operations debug_periodic_fops = {
316 .owner = THIS_MODULE,
317 .open = debug_periodic_open,
318 .read = debug_output,
319 .release = debug_close,
320 .llseek = default_llseek,
321};
322
323static const struct file_operations debug_registers_fops = {
324 .owner = THIS_MODULE,
325 .open = debug_registers_open,
326 .read = debug_output,
327 .release = debug_close,
328 .llseek = default_llseek,
329};
330
331static struct dentry *ehci_debug_root;
332
333struct debug_buffer {
334 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
335 struct usb_bus *bus;
336 struct mutex mutex; /* protect filling of buffer */
337 size_t count; /* number of characters filled into buffer */
338 char *output_buf;
339 size_t alloc_size;
340};
341
342static inline char speed_char(u32 info1)
343{
344 switch (info1 & (3 << 12)) {
345 case QH_FULL_SPEED:
346 return 'f';
347 case QH_LOW_SPEED:
348 return 'l';
349 case QH_HIGH_SPEED:
350 return 'h';
351 default:
352 return '?';
353 }
354}
355
356static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
357{
358 __u32 v = hc32_to_cpu(ehci, token);
359
360 if (v & QTD_STS_ACTIVE)
361 return '*';
362 if (v & QTD_STS_HALT)
363 return '-';
364 if (!IS_SHORT_READ(v))
365 return ' ';
366 /* tries to advance through hw_alt_next */
367 return '/';
368}
369
370static void qh_lines(struct ehci_hcd *ehci, struct ehci_qh *qh,
371 char **nextp, unsigned *sizep)
372{
373 u32 scratch;
374 u32 hw_curr;
375 struct list_head *entry;
376 struct ehci_qtd *td;
377 unsigned temp;
378 unsigned size = *sizep;
379 char *next = *nextp;
380 char mark;
381 __le32 list_end = EHCI_LIST_END(ehci);
382 struct ehci_qh_hw *hw = qh->hw;
383
384 if (hw->hw_qtd_next == list_end) /* NEC does this */
385 mark = '@';
386 else
387 mark = token_mark(ehci, hw->hw_token);
388 if (mark == '/') { /* qh_alt_next controls qh advance? */
389 if ((hw->hw_alt_next & QTD_MASK(ehci))
390 == ehci->async->hw->hw_alt_next)
391 mark = '#'; /* blocked */
392 else if (hw->hw_alt_next == list_end)
393 mark = '.'; /* use hw_qtd_next */
394 /* else alt_next points to some other qtd */
395 }
396 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
397 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
398 temp = scnprintf(next, size,
399 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)"
400 " [cur %08x next %08x buf[0] %08x]",
401 qh, scratch & 0x007f,
402 speed_char (scratch),
403 (scratch >> 8) & 0x000f,
404 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
405 hc32_to_cpup(ehci, &hw->hw_token), mark,
406 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
407 ? "data1" : "data0",
408 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f,
409 hc32_to_cpup(ehci, &hw->hw_current),
410 hc32_to_cpup(ehci, &hw->hw_qtd_next),
411 hc32_to_cpup(ehci, &hw->hw_buf[0]));
412 size -= temp;
413 next += temp;
414
415 /* hc may be modifying the list as we read it ... */
416 list_for_each(entry, &qh->qtd_list) {
417 char *type;
418
419 td = list_entry(entry, struct ehci_qtd, qtd_list);
420 scratch = hc32_to_cpup(ehci, &td->hw_token);
421 mark = ' ';
422 if (hw_curr == td->qtd_dma) {
423 mark = '*';
424 } else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) {
425 mark = '+';
426 } else if (QTD_LENGTH(scratch)) {
427 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
428 mark = '#';
429 else if (td->hw_alt_next != list_end)
430 mark = '/';
431 }
432 switch ((scratch >> 8) & 0x03) {
433 case 0:
434 type = "out";
435 break;
436 case 1:
437 type = "in";
438 break;
439 case 2:
440 type = "setup";
441 break;
442 default:
443 type = "?";
444 break;
445 }
446 temp = scnprintf(next, size,
447 "\n\t%p%c%s len=%d %08x urb %p"
448 " [td %08x buf[0] %08x]",
449 td, mark, type,
450 (scratch >> 16) & 0x7fff,
451 scratch,
452 td->urb,
453 (u32) td->qtd_dma,
454 hc32_to_cpup(ehci, &td->hw_buf[0]));
455 size -= temp;
456 next += temp;
457 if (temp == size)
458 goto done;
459 }
460
461 temp = scnprintf(next, size, "\n");
462 size -= temp;
463 next += temp;
464
465done:
466 *sizep = size;
467 *nextp = next;
468}
469
470static ssize_t fill_async_buffer(struct debug_buffer *buf)
471{
472 struct usb_hcd *hcd;
473 struct ehci_hcd *ehci;
474 unsigned long flags;
475 unsigned temp, size;
476 char *next;
477 struct ehci_qh *qh;
478
479 hcd = bus_to_hcd(buf->bus);
480 ehci = hcd_to_ehci(hcd);
481 next = buf->output_buf;
482 size = buf->alloc_size;
483
484 *next = 0;
485
486 /*
487 * dumps a snapshot of the async schedule.
488 * usually empty except for long-term bulk reads, or head.
489 * one QH per line, and TDs we know about
490 */
491 spin_lock_irqsave(&ehci->lock, flags);
492 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
493 qh_lines(ehci, qh, &next, &size);
494 if (!list_empty(&ehci->async_unlink) && size > 0) {
495 temp = scnprintf(next, size, "\nunlink =\n");
496 size -= temp;
497 next += temp;
498
499 list_for_each_entry(qh, &ehci->async_unlink, unlink_node) {
500 if (size <= 0)
501 break;
502 qh_lines(ehci, qh, &next, &size);
503 }
504 }
505 spin_unlock_irqrestore(&ehci->lock, flags);
506
507 return strlen(buf->output_buf);
508}
509
510static ssize_t fill_bandwidth_buffer(struct debug_buffer *buf)
511{
512 struct ehci_hcd *ehci;
513 struct ehci_tt *tt;
514 struct ehci_per_sched *ps;
515 unsigned temp, size;
516 char *next;
517 unsigned i;
518 u8 *bw;
519 u16 *bf;
520 u8 budget[EHCI_BANDWIDTH_SIZE];
521
522 ehci = hcd_to_ehci(bus_to_hcd(buf->bus));
523 next = buf->output_buf;
524 size = buf->alloc_size;
525
526 *next = 0;
527
528 spin_lock_irq(&ehci->lock);
529
530 /* Dump the HS bandwidth table */
531 temp = scnprintf(next, size,
532 "HS bandwidth allocation (us per microframe)\n");
533 size -= temp;
534 next += temp;
535 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) {
536 bw = &ehci->bandwidth[i];
537 temp = scnprintf(next, size,
538 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n",
539 i, bw[0], bw[1], bw[2], bw[3],
540 bw[4], bw[5], bw[6], bw[7]);
541 size -= temp;
542 next += temp;
543 }
544
545 /* Dump all the FS/LS tables */
546 list_for_each_entry(tt, &ehci->tt_list, tt_list) {
547 temp = scnprintf(next, size,
548 "\nTT %s port %d FS/LS bandwidth allocation (us per frame)\n",
549 dev_name(&tt->usb_tt->hub->dev),
550 tt->tt_port + !!tt->usb_tt->multi);
551 size -= temp;
552 next += temp;
553
554 bf = tt->bandwidth;
555 temp = scnprintf(next, size,
556 " %5u%5u%5u%5u%5u%5u%5u%5u\n",
557 bf[0], bf[1], bf[2], bf[3],
558 bf[4], bf[5], bf[6], bf[7]);
559 size -= temp;
560 next += temp;
561
562 temp = scnprintf(next, size,
563 "FS/LS budget (us per microframe)\n");
564 size -= temp;
565 next += temp;
566 compute_tt_budget(budget, tt);
567 for (i = 0; i < EHCI_BANDWIDTH_SIZE; i += 8) {
568 bw = &budget[i];
569 temp = scnprintf(next, size,
570 "%2u: %4u%4u%4u%4u%4u%4u%4u%4u\n",
571 i, bw[0], bw[1], bw[2], bw[3],
572 bw[4], bw[5], bw[6], bw[7]);
573 size -= temp;
574 next += temp;
575 }
576 list_for_each_entry(ps, &tt->ps_list, ps_list) {
577 temp = scnprintf(next, size,
578 "%s ep %02x: %4u @ %2u.%u+%u mask %04x\n",
579 dev_name(&ps->udev->dev),
580 ps->ep->desc.bEndpointAddress,
581 ps->tt_usecs,
582 ps->bw_phase, ps->phase_uf,
583 ps->bw_period, ps->cs_mask);
584 size -= temp;
585 next += temp;
586 }
587 }
588 spin_unlock_irq(&ehci->lock);
589
590 return next - buf->output_buf;
591}
592
593static unsigned output_buf_tds_dir(char *buf, struct ehci_hcd *ehci,
594 struct ehci_qh_hw *hw, struct ehci_qh *qh, unsigned size)
595{
596 u32 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
597 struct ehci_qtd *qtd;
598 char *type = "";
599 unsigned temp = 0;
600
601 /* count tds, get ep direction */
602 list_for_each_entry(qtd, &qh->qtd_list, qtd_list) {
603 temp++;
604 switch ((hc32_to_cpu(ehci, qtd->hw_token) >> 8) & 0x03) {
605 case 0:
606 type = "out";
607 continue;
608 case 1:
609 type = "in";
610 continue;
611 }
612 }
613
614 return scnprintf(buf, size, " (%c%d ep%d%s [%d/%d] q%d p%d)",
615 speed_char(scratch), scratch & 0x007f,
616 (scratch >> 8) & 0x000f, type, qh->ps.usecs,
617 qh->ps.c_usecs, temp, 0x7ff & (scratch >> 16));
618}
619
620#define DBG_SCHED_LIMIT 64
621static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
622{
623 struct usb_hcd *hcd;
624 struct ehci_hcd *ehci;
625 unsigned long flags;
626 union ehci_shadow p, *seen;
627 unsigned temp, size, seen_count;
628 char *next;
629 unsigned i;
630 __hc32 tag;
631
632 seen = kmalloc_array(DBG_SCHED_LIMIT, sizeof(*seen), GFP_ATOMIC);
633 if (!seen)
634 return 0;
635 seen_count = 0;
636
637 hcd = bus_to_hcd(buf->bus);
638 ehci = hcd_to_ehci(hcd);
639 next = buf->output_buf;
640 size = buf->alloc_size;
641
642 temp = scnprintf(next, size, "size = %d\n", ehci->periodic_size);
643 size -= temp;
644 next += temp;
645
646 /*
647 * dump a snapshot of the periodic schedule.
648 * iso changes, interrupt usually doesn't.
649 */
650 spin_lock_irqsave(&ehci->lock, flags);
651 for (i = 0; i < ehci->periodic_size; i++) {
652 p = ehci->pshadow[i];
653 if (likely(!p.ptr))
654 continue;
655 tag = Q_NEXT_TYPE(ehci, ehci->periodic[i]);
656
657 temp = scnprintf(next, size, "%4d: ", i);
658 size -= temp;
659 next += temp;
660
661 do {
662 struct ehci_qh_hw *hw;
663
664 switch (hc32_to_cpu(ehci, tag)) {
665 case Q_TYPE_QH:
666 hw = p.qh->hw;
667 temp = scnprintf(next, size, " qh%d-%04x/%p",
668 p.qh->ps.period,
669 hc32_to_cpup(ehci,
670 &hw->hw_info2)
671 /* uframe masks */
672 & (QH_CMASK | QH_SMASK),
673 p.qh);
674 size -= temp;
675 next += temp;
676 /* don't repeat what follows this qh */
677 for (temp = 0; temp < seen_count; temp++) {
678 if (seen[temp].ptr != p.ptr)
679 continue;
680 if (p.qh->qh_next.ptr) {
681 temp = scnprintf(next, size,
682 " ...");
683 size -= temp;
684 next += temp;
685 }
686 break;
687 }
688 /* show more info the first time around */
689 if (temp == seen_count) {
690 temp = output_buf_tds_dir(next, ehci,
691 hw, p.qh, size);
692
693 if (seen_count < DBG_SCHED_LIMIT)
694 seen[seen_count++].qh = p.qh;
695 } else {
696 temp = 0;
697 }
698 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
699 p = p.qh->qh_next;
700 break;
701 case Q_TYPE_FSTN:
702 temp = scnprintf(next, size,
703 " fstn-%8x/%p", p.fstn->hw_prev,
704 p.fstn);
705 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
706 p = p.fstn->fstn_next;
707 break;
708 case Q_TYPE_ITD:
709 temp = scnprintf(next, size,
710 " itd/%p", p.itd);
711 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
712 p = p.itd->itd_next;
713 break;
714 case Q_TYPE_SITD:
715 temp = scnprintf(next, size,
716 " sitd%d-%04x/%p",
717 p.sitd->stream->ps.period,
718 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
719 & 0x0000ffff,
720 p.sitd);
721 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
722 p = p.sitd->sitd_next;
723 break;
724 }
725 size -= temp;
726 next += temp;
727 } while (p.ptr);
728
729 temp = scnprintf(next, size, "\n");
730 size -= temp;
731 next += temp;
732 }
733 spin_unlock_irqrestore(&ehci->lock, flags);
734 kfree(seen);
735
736 return buf->alloc_size - size;
737}
738#undef DBG_SCHED_LIMIT
739
740static const char *rh_state_string(struct ehci_hcd *ehci)
741{
742 switch (ehci->rh_state) {
743 case EHCI_RH_HALTED:
744 return "halted";
745 case EHCI_RH_SUSPENDED:
746 return "suspended";
747 case EHCI_RH_RUNNING:
748 return "running";
749 case EHCI_RH_STOPPING:
750 return "stopping";
751 }
752 return "?";
753}
754
755static ssize_t fill_registers_buffer(struct debug_buffer *buf)
756{
757 struct usb_hcd *hcd;
758 struct ehci_hcd *ehci;
759 unsigned long flags;
760 unsigned temp, size, i;
761 char *next, scratch[80];
762 static char fmt[] = "%*s\n";
763 static char label[] = "";
764
765 hcd = bus_to_hcd(buf->bus);
766 ehci = hcd_to_ehci(hcd);
767 next = buf->output_buf;
768 size = buf->alloc_size;
769
770 spin_lock_irqsave(&ehci->lock, flags);
771
772 if (!HCD_HW_ACCESSIBLE(hcd)) {
773 size = scnprintf(next, size,
774 "bus %s, device %s\n"
775 "%s\n"
776 "SUSPENDED (no register access)\n",
777 hcd->self.controller->bus->name,
778 dev_name(hcd->self.controller),
779 hcd->product_desc);
780 goto done;
781 }
782
783 /* Capability Registers */
784 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
785 temp = scnprintf(next, size,
786 "bus %s, device %s\n"
787 "%s\n"
788 "EHCI %x.%02x, rh state %s\n",
789 hcd->self.controller->bus->name,
790 dev_name(hcd->self.controller),
791 hcd->product_desc,
792 i >> 8, i & 0x0ff, rh_state_string(ehci));
793 size -= temp;
794 next += temp;
795
796#ifdef CONFIG_USB_PCI
797 /* EHCI 0.96 and later may have "extended capabilities" */
798 if (dev_is_pci(hcd->self.controller)) {
799 struct pci_dev *pdev;
800 u32 offset, cap, cap2;
801 unsigned count = 256 / 4;
802
803 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
804 offset = HCC_EXT_CAPS(ehci_readl(ehci,
805 &ehci->caps->hcc_params));
806 while (offset && count--) {
807 pci_read_config_dword(pdev, offset, &cap);
808 switch (cap & 0xff) {
809 case 1:
810 temp = scnprintf(next, size,
811 "ownership %08x%s%s\n", cap,
812 (cap & (1 << 24)) ? " linux" : "",
813 (cap & (1 << 16)) ? " firmware" : "");
814 size -= temp;
815 next += temp;
816
817 offset += 4;
818 pci_read_config_dword(pdev, offset, &cap2);
819 temp = scnprintf(next, size,
820 "SMI sts/enable 0x%08x\n", cap2);
821 size -= temp;
822 next += temp;
823 break;
824 case 0: /* illegal reserved capability */
825 cap = 0;
826 fallthrough;
827 default: /* unknown */
828 break;
829 }
830 offset = (cap >> 8) & 0xff;
831 }
832 }
833#endif
834
835 /* FIXME interpret both types of params */
836 i = ehci_readl(ehci, &ehci->caps->hcs_params);
837 temp = scnprintf(next, size, "structural params 0x%08x\n", i);
838 size -= temp;
839 next += temp;
840
841 i = ehci_readl(ehci, &ehci->caps->hcc_params);
842 temp = scnprintf(next, size, "capability params 0x%08x\n", i);
843 size -= temp;
844 next += temp;
845
846 /* Operational Registers */
847 temp = dbg_status_buf(scratch, sizeof(scratch), label,
848 ehci_readl(ehci, &ehci->regs->status));
849 temp = scnprintf(next, size, fmt, temp, scratch);
850 size -= temp;
851 next += temp;
852
853 temp = dbg_command_buf(scratch, sizeof(scratch), label,
854 ehci_readl(ehci, &ehci->regs->command));
855 temp = scnprintf(next, size, fmt, temp, scratch);
856 size -= temp;
857 next += temp;
858
859 temp = dbg_intr_buf(scratch, sizeof(scratch), label,
860 ehci_readl(ehci, &ehci->regs->intr_enable));
861 temp = scnprintf(next, size, fmt, temp, scratch);
862 size -= temp;
863 next += temp;
864
865 temp = scnprintf(next, size, "uframe %04x\n",
866 ehci_read_frame_index(ehci));
867 size -= temp;
868 next += temp;
869
870 for (i = 1; i <= HCS_N_PORTS(ehci->hcs_params); i++) {
871 temp = dbg_port_buf(scratch, sizeof(scratch), label, i,
872 ehci_readl(ehci,
873 &ehci->regs->port_status[i - 1]));
874 temp = scnprintf(next, size, fmt, temp, scratch);
875 size -= temp;
876 next += temp;
877 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
878 temp = scnprintf(next, size,
879 " debug control %08x\n",
880 ehci_readl(ehci,
881 &ehci->debug->control));
882 size -= temp;
883 next += temp;
884 }
885 }
886
887 if (!list_empty(&ehci->async_unlink)) {
888 temp = scnprintf(next, size, "async unlink qh %p\n",
889 list_first_entry(&ehci->async_unlink,
890 struct ehci_qh, unlink_node));
891 size -= temp;
892 next += temp;
893 }
894
895#ifdef EHCI_STATS
896 temp = scnprintf(next, size,
897 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
898 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
899 ehci->stats.lost_iaa);
900 size -= temp;
901 next += temp;
902
903 temp = scnprintf(next, size, "complete %ld unlink %ld\n",
904 ehci->stats.complete, ehci->stats.unlink);
905 size -= temp;
906 next += temp;
907#endif
908
909done:
910 spin_unlock_irqrestore(&ehci->lock, flags);
911
912 return buf->alloc_size - size;
913}
914
915static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
916 ssize_t (*fill_func)(struct debug_buffer *))
917{
918 struct debug_buffer *buf;
919
920 buf = kzalloc(sizeof(*buf), GFP_KERNEL);
921
922 if (buf) {
923 buf->bus = bus;
924 buf->fill_func = fill_func;
925 mutex_init(&buf->mutex);
926 buf->alloc_size = PAGE_SIZE;
927 }
928
929 return buf;
930}
931
932static int fill_buffer(struct debug_buffer *buf)
933{
934 int ret = 0;
935
936 if (!buf->output_buf)
937 buf->output_buf = vmalloc(buf->alloc_size);
938
939 if (!buf->output_buf) {
940 ret = -ENOMEM;
941 goto out;
942 }
943
944 ret = buf->fill_func(buf);
945
946 if (ret >= 0) {
947 buf->count = ret;
948 ret = 0;
949 }
950
951out:
952 return ret;
953}
954
955static ssize_t debug_output(struct file *file, char __user *user_buf,
956 size_t len, loff_t *offset)
957{
958 struct debug_buffer *buf = file->private_data;
959 int ret = 0;
960
961 mutex_lock(&buf->mutex);
962 if (buf->count == 0) {
963 ret = fill_buffer(buf);
964 if (ret != 0) {
965 mutex_unlock(&buf->mutex);
966 goto out;
967 }
968 }
969 mutex_unlock(&buf->mutex);
970
971 ret = simple_read_from_buffer(user_buf, len, offset,
972 buf->output_buf, buf->count);
973
974out:
975 return ret;
976}
977
978static int debug_close(struct inode *inode, struct file *file)
979{
980 struct debug_buffer *buf = file->private_data;
981
982 if (buf) {
983 vfree(buf->output_buf);
984 kfree(buf);
985 }
986
987 return 0;
988}
989
990static int debug_async_open(struct inode *inode, struct file *file)
991{
992 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
993
994 return file->private_data ? 0 : -ENOMEM;
995}
996
997static int debug_bandwidth_open(struct inode *inode, struct file *file)
998{
999 file->private_data = alloc_buffer(inode->i_private,
1000 fill_bandwidth_buffer);
1001
1002 return file->private_data ? 0 : -ENOMEM;
1003}
1004
1005static int debug_periodic_open(struct inode *inode, struct file *file)
1006{
1007 struct debug_buffer *buf;
1008
1009 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
1010 if (!buf)
1011 return -ENOMEM;
1012
1013 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8) * PAGE_SIZE;
1014 file->private_data = buf;
1015 return 0;
1016}
1017
1018static int debug_registers_open(struct inode *inode, struct file *file)
1019{
1020 file->private_data = alloc_buffer(inode->i_private,
1021 fill_registers_buffer);
1022
1023 return file->private_data ? 0 : -ENOMEM;
1024}
1025
1026static inline void create_debug_files(struct ehci_hcd *ehci)
1027{
1028 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1029
1030 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1031
1032 debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1033 &debug_async_fops);
1034 debugfs_create_file("bandwidth", S_IRUGO, ehci->debug_dir, bus,
1035 &debug_bandwidth_fops);
1036 debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1037 &debug_periodic_fops);
1038 debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1039 &debug_registers_fops);
1040}
1041
1042static inline void remove_debug_files(struct ehci_hcd *ehci)
1043{
1044 debugfs_remove_recursive(ehci->debug_dir);
1045}
1046
1047#else /* CONFIG_DYNAMIC_DEBUG */
1048
1049static inline void dbg_hcs_params(struct ehci_hcd *ehci, char *label) { }
1050static inline void dbg_hcc_params(struct ehci_hcd *ehci, char *label) { }
1051
1052static inline void __maybe_unused dbg_qh(const char *label,
1053 struct ehci_hcd *ehci, struct ehci_qh *qh) { }
1054
1055static inline int __maybe_unused dbg_status_buf(const char *buf,
1056 unsigned int len, const char *label, u32 status)
1057{ return 0; }
1058
1059static inline int __maybe_unused dbg_command_buf(const char *buf,
1060 unsigned int len, const char *label, u32 command)
1061{ return 0; }
1062
1063static inline int __maybe_unused dbg_intr_buf(const char *buf,
1064 unsigned int len, const char *label, u32 enable)
1065{ return 0; }
1066
1067static inline int __maybe_unused dbg_port_buf(char *buf,
1068 unsigned int len, const char *label, int port, u32 status)
1069{ return 0; }
1070
1071static inline void dbg_status(struct ehci_hcd *ehci, const char *label,
1072 u32 status) { }
1073static inline void dbg_cmd(struct ehci_hcd *ehci, const char *label,
1074 u32 command) { }
1075static inline void dbg_port(struct ehci_hcd *ehci, const char *label,
1076 int port, u32 status) { }
1077
1078static inline void create_debug_files(struct ehci_hcd *bus) { }
1079static inline void remove_debug_files(struct ehci_hcd *bus) { }
1080
1081#endif /* CONFIG_DYNAMIC_DEBUG */