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spi-topcliff-pch: add recovery processing in case wait-event timeout
[zen-stable.git] / drivers / usb / host / ehci-dbg.c
blobd6d74d2e09f41c02400aedfb8295b0aa27613cc0
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 */
42 static 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
76 static 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 * */
86 static 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
115 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
116
117 #endif
118
119 #ifdef DEBUG
120
121 static void __maybe_unused
122 dbg_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
137 static void __maybe_unused
138 dbg_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
147 static void __maybe_unused
148 dbg_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
178 static void __maybe_unused
179 dbg_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
193 static int __maybe_unused
194 dbg_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
213 static int __maybe_unused
214 dbg_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
229 static const char *const fls_strings [] =
230 { "1024", "512", "256", "??" };
231
232 static int
233 dbg_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
257 static int
258 dbg_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
299 static inline void __maybe_unused
300 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
301 {}
302
303 static inline int __maybe_unused
304 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
305 { return 0; }
306
307 static inline int __maybe_unused
308 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
309 { return 0; }
310
311 static inline int __maybe_unused
312 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
313 { return 0; }
314
315 static inline int __maybe_unused
316 dbg_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
344 static inline void create_debug_files (struct ehci_hcd *bus) { }
345 static inline void remove_debug_files (struct ehci_hcd *bus) { }
346
347 #else
348
349 /* troubleshooting help: expose state in debugfs */
350
351 static int debug_async_open(struct inode *, struct file *);
352 static int debug_periodic_open(struct inode *, struct file *);
353 static int debug_registers_open(struct inode *, struct file *);
354 static int debug_async_open(struct inode *, struct file *);
355 static int debug_lpm_open(struct inode *, struct file *);
356 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
357 size_t count, loff_t *ppos);
358 static ssize_t debug_lpm_write(struct file *file, const char __user *buffer,
359 size_t count, loff_t *ppos);
360 static int debug_lpm_close(struct inode *inode, struct file *file);
361
362 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
363 static int debug_close(struct inode *, struct file *);
364
365 static 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 };
372 static 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 };
379 static 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 };
386 static 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
395 static struct dentry *ehci_debug_root;
396
397 struct 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
414 static 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
428 static 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
514 done:
515 *sizep = size;
516 *nextp = next;
517 }
518
519 static 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
556 static 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
700 static const char *rh_state_string(struct ehci_hcd *ehci)
701 {
702 switch (ehci->rh_state) {
703 case EHCI_RH_HALTED:
704 return "halted";
705 case EHCI_RH_SUSPENDED:
706 return "suspended";
707 case EHCI_RH_RUNNING:
708 return "running";
709 }
710 return "?";
711 }
712
713 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
714 {
715 struct usb_hcd *hcd;
716 struct ehci_hcd *ehci;
717 unsigned long flags;
718 unsigned temp, size, i;
719 char *next, scratch [80];
720 static char fmt [] = "%*s\n";
721 static char label [] = "";
722
723 hcd = bus_to_hcd(buf->bus);
724 ehci = hcd_to_ehci (hcd);
725 next = buf->output_buf;
726 size = buf->alloc_size;
727
728 spin_lock_irqsave (&ehci->lock, flags);
729
730 if (!HCD_HW_ACCESSIBLE(hcd)) {
731 size = scnprintf (next, size,
732 "bus %s, device %s\n"
733 "%s\n"
734 "SUSPENDED (no register access)\n",
735 hcd->self.controller->bus->name,
736 dev_name(hcd->self.controller),
737 hcd->product_desc);
738 goto done;
739 }
740
741 /* Capability Registers */
742 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
743 temp = scnprintf (next, size,
744 "bus %s, device %s\n"
745 "%s\n"
746 "EHCI %x.%02x, rh state %s\n",
747 hcd->self.controller->bus->name,
748 dev_name(hcd->self.controller),
749 hcd->product_desc,
750 i >> 8, i & 0x0ff, rh_state_string(ehci));
751 size -= temp;
752 next += temp;
753
754 #ifdef CONFIG_PCI
755 /* EHCI 0.96 and later may have "extended capabilities" */
756 if (hcd->self.controller->bus == &pci_bus_type) {
757 struct pci_dev *pdev;
758 u32 offset, cap, cap2;
759 unsigned count = 256/4;
760
761 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
762 offset = HCC_EXT_CAPS(ehci_readl(ehci,
763 &ehci->caps->hcc_params));
764 while (offset && count--) {
765 pci_read_config_dword (pdev, offset, &cap);
766 switch (cap & 0xff) {
767 case 1:
768 temp = scnprintf (next, size,
769 "ownership %08x%s%s\n", cap,
770 (cap & (1 << 24)) ? " linux" : "",
771 (cap & (1 << 16)) ? " firmware" : "");
772 size -= temp;
773 next += temp;
774
775 offset += 4;
776 pci_read_config_dword (pdev, offset, &cap2);
777 temp = scnprintf (next, size,
778 "SMI sts/enable 0x%08x\n", cap2);
779 size -= temp;
780 next += temp;
781 break;
782 case 0: /* illegal reserved capability */
783 cap = 0;
784 /* FALLTHROUGH */
785 default: /* unknown */
786 break;
787 }
788 temp = (cap >> 8) & 0xff;
789 }
790 }
791 #endif
792
793 // FIXME interpret both types of params
794 i = ehci_readl(ehci, &ehci->caps->hcs_params);
795 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
796 size -= temp;
797 next += temp;
798
799 i = ehci_readl(ehci, &ehci->caps->hcc_params);
800 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
801 size -= temp;
802 next += temp;
803
804 /* Operational Registers */
805 temp = dbg_status_buf (scratch, sizeof scratch, label,
806 ehci_readl(ehci, &ehci->regs->status));
807 temp = scnprintf (next, size, fmt, temp, scratch);
808 size -= temp;
809 next += temp;
810
811 temp = dbg_command_buf (scratch, sizeof scratch, label,
812 ehci_readl(ehci, &ehci->regs->command));
813 temp = scnprintf (next, size, fmt, temp, scratch);
814 size -= temp;
815 next += temp;
816
817 temp = dbg_intr_buf (scratch, sizeof scratch, label,
818 ehci_readl(ehci, &ehci->regs->intr_enable));
819 temp = scnprintf (next, size, fmt, temp, scratch);
820 size -= temp;
821 next += temp;
822
823 temp = scnprintf (next, size, "uframe %04x\n",
824 ehci_read_frame_index(ehci));
825 size -= temp;
826 next += temp;
827
828 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
829 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
830 ehci_readl(ehci,
831 &ehci->regs->port_status[i - 1]));
832 temp = scnprintf (next, size, fmt, temp, scratch);
833 size -= temp;
834 next += temp;
835 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
836 temp = scnprintf (next, size,
837 " debug control %08x\n",
838 ehci_readl(ehci,
839 &ehci->debug->control));
840 size -= temp;
841 next += temp;
842 }
843 }
844
845 if (ehci->reclaim) {
846 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
847 size -= temp;
848 next += temp;
849 }
850
851 #ifdef EHCI_STATS
852 temp = scnprintf (next, size,
853 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
854 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
855 ehci->stats.lost_iaa);
856 size -= temp;
857 next += temp;
858
859 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
860 ehci->stats.complete, ehci->stats.unlink);
861 size -= temp;
862 next += temp;
863 #endif
864
865 done:
866 spin_unlock_irqrestore (&ehci->lock, flags);
867
868 return buf->alloc_size - size;
869 }
870
871 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
872 ssize_t (*fill_func)(struct debug_buffer *))
873 {
874 struct debug_buffer *buf;
875
876 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
877
878 if (buf) {
879 buf->bus = bus;
880 buf->fill_func = fill_func;
881 mutex_init(&buf->mutex);
882 buf->alloc_size = PAGE_SIZE;
883 }
884
885 return buf;
886 }
887
888 static int fill_buffer(struct debug_buffer *buf)
889 {
890 int ret = 0;
891
892 if (!buf->output_buf)
893 buf->output_buf = vmalloc(buf->alloc_size);
894
895 if (!buf->output_buf) {
896 ret = -ENOMEM;
897 goto out;
898 }
899
900 ret = buf->fill_func(buf);
901
902 if (ret >= 0) {
903 buf->count = ret;
904 ret = 0;
905 }
906
907 out:
908 return ret;
909 }
910
911 static ssize_t debug_output(struct file *file, char __user *user_buf,
912 size_t len, loff_t *offset)
913 {
914 struct debug_buffer *buf = file->private_data;
915 int ret = 0;
916
917 mutex_lock(&buf->mutex);
918 if (buf->count == 0) {
919 ret = fill_buffer(buf);
920 if (ret != 0) {
921 mutex_unlock(&buf->mutex);
922 goto out;
923 }
924 }
925 mutex_unlock(&buf->mutex);
926
927 ret = simple_read_from_buffer(user_buf, len, offset,
928 buf->output_buf, buf->count);
929
930 out:
931 return ret;
932
933 }
934
935 static int debug_close(struct inode *inode, struct file *file)
936 {
937 struct debug_buffer *buf = file->private_data;
938
939 if (buf) {
940 vfree(buf->output_buf);
941 kfree(buf);
942 }
943
944 return 0;
945 }
946 static int debug_async_open(struct inode *inode, struct file *file)
947 {
948 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
949
950 return file->private_data ? 0 : -ENOMEM;
951 }
952
953 static int debug_periodic_open(struct inode *inode, struct file *file)
954 {
955 struct debug_buffer *buf;
956 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
957 if (!buf)
958 return -ENOMEM;
959
960 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
961 file->private_data = buf;
962 return 0;
963 }
964
965 static int debug_registers_open(struct inode *inode, struct file *file)
966 {
967 file->private_data = alloc_buffer(inode->i_private,
968 fill_registers_buffer);
969
970 return file->private_data ? 0 : -ENOMEM;
971 }
972
973 static int debug_lpm_open(struct inode *inode, struct file *file)
974 {
975 file->private_data = inode->i_private;
976 return 0;
977 }
978
979 static int debug_lpm_close(struct inode *inode, struct file *file)
980 {
981 return 0;
982 }
983
984 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
985 size_t count, loff_t *ppos)
986 {
987 /* TODO: show lpm stats */
988 return 0;
989 }
990
991 static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
992 size_t count, loff_t *ppos)
993 {
994 struct usb_hcd *hcd;
995 struct ehci_hcd *ehci;
996 char buf[50];
997 size_t len;
998 u32 temp;
999 unsigned long port;
1000 u32 __iomem *portsc ;
1001 u32 params;
1002
1003 hcd = bus_to_hcd(file->private_data);
1004 ehci = hcd_to_ehci(hcd);
1005
1006 len = min(count, sizeof(buf) - 1);
1007 if (copy_from_user(buf, user_buf, len))
1008 return -EFAULT;
1009 buf[len] = '\0';
1010 if (len > 0 && buf[len - 1] == '\n')
1011 buf[len - 1] = '\0';
1012
1013 if (strncmp(buf, "enable", 5) == 0) {
1014 if (strict_strtoul(buf + 7, 10, &port))
1015 return -EINVAL;
1016 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1017 if (port > HCS_N_PORTS(params)) {
1018 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1019 return -ENODEV;
1020 }
1021 portsc = &ehci->regs->port_status[port-1];
1022 temp = ehci_readl(ehci, portsc);
1023 if (!(temp & PORT_DEV_ADDR)) {
1024 ehci_dbg(ehci, "LPM: no device attached\n");
1025 return -ENODEV;
1026 }
1027 temp |= PORT_LPM;
1028 ehci_writel(ehci, temp, portsc);
1029 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1030 } else if (strncmp(buf, "hird=", 5) == 0) {
1031 unsigned long hird;
1032 if (strict_strtoul(buf + 5, 16, &hird))
1033 return -EINVAL;
1034 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1035 temp = ehci_readl(ehci, &ehci->regs->command);
1036 temp &= ~CMD_HIRD;
1037 temp |= hird << 24;
1038 ehci_writel(ehci, temp, &ehci->regs->command);
1039 } else if (strncmp(buf, "disable", 7) == 0) {
1040 if (strict_strtoul(buf + 8, 10, &port))
1041 return -EINVAL;
1042 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1043 if (port > HCS_N_PORTS(params)) {
1044 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1045 return -ENODEV;
1046 }
1047 portsc = &ehci->regs->port_status[port-1];
1048 temp = ehci_readl(ehci, portsc);
1049 if (!(temp & PORT_DEV_ADDR)) {
1050 ehci_dbg(ehci, "ERR: no device attached\n");
1051 return -ENODEV;
1052 }
1053 temp &= ~PORT_LPM;
1054 ehci_writel(ehci, temp, portsc);
1055 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1056 } else
1057 return -EOPNOTSUPP;
1058 return count;
1059 }
1060
1061 static inline void create_debug_files (struct ehci_hcd *ehci)
1062 {
1063 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1064
1065 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1066 if (!ehci->debug_dir)
1067 return;
1068
1069 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1070 &debug_async_fops))
1071 goto file_error;
1072
1073 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1074 &debug_periodic_fops))
1075 goto file_error;
1076
1077 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1078 &debug_registers_fops))
1079 goto file_error;
1080
1081 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus,
1082 &debug_lpm_fops))
1083 goto file_error;
1084
1085 return;
1086
1087 file_error:
1088 debugfs_remove_recursive(ehci->debug_dir);
1089 }
1090
1091 static inline void remove_debug_files (struct ehci_hcd *ehci)
1092 {
1093 debugfs_remove_recursive(ehci->debug_dir);
1094 }
1095
1096 #endif /* STUB_DEBUG_FILES */