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Linux 2.6.36-rc5
[linux-2.6/get_maintainer.git] / drivers / usb / host / ehci-dbg.c
blob76b7fd2d838a32a9abdaae48d8c862090b3a0ed9
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 vdbg dbg
32 # define ehci_vdbg ehci_dbg
33 #else
34 # define vdbg(fmt,args...) do { } while (0)
35 # define ehci_vdbg(ehci, fmt, args...) do { } while (0)
36 #endif
37
38 #ifdef DEBUG
39
40 /* check the values in the HCSPARAMS register
41 * (host controller _Structural_ parameters)
42 * see EHCI spec, Table 2-4 for each value
43 */
44 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
45 {
46 u32 params = ehci_readl(ehci, &ehci->caps->hcs_params);
47
48 ehci_dbg (ehci,
49 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
50 label, params,
51 HCS_DEBUG_PORT (params),
52 HCS_INDICATOR (params) ? " ind" : "",
53 HCS_N_CC (params),
54 HCS_N_PCC (params),
55 HCS_PORTROUTED (params) ? "" : " ordered",
56 HCS_PPC (params) ? "" : " !ppc",
57 HCS_N_PORTS (params)
58 );
59 /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
60 if (HCS_PORTROUTED (params)) {
61 int i;
62 char buf [46], tmp [7], byte;
63
64 buf[0] = 0;
65 for (i = 0; i < HCS_N_PORTS (params); i++) {
66 // FIXME MIPS won't readb() ...
67 byte = readb (&ehci->caps->portroute[(i>>1)]);
68 sprintf(tmp, "%d ",
69 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
70 strcat(buf, tmp);
71 }
72 ehci_dbg (ehci, "%s portroute %s\n",
73 label, buf);
74 }
75 }
76 #else
77
78 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
79
80 #endif
81
82 #ifdef DEBUG
83
84 /* check the values in the HCCPARAMS register
85 * (host controller _Capability_ parameters)
86 * see EHCI Spec, Table 2-5 for each value
87 * */
88 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
89 {
90 u32 params = ehci_readl(ehci, &ehci->caps->hcc_params);
91
92 if (HCC_ISOC_CACHE (params)) {
93 ehci_dbg (ehci,
94 "%s hcc_params %04x caching frame %s%s%s\n",
95 label, params,
96 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
97 HCC_CANPARK(params) ? " park" : "",
98 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
99 } else {
100 ehci_dbg (ehci,
101 "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n",
102 label,
103 params,
104 HCC_ISOC_THRES(params),
105 HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
106 HCC_CANPARK(params) ? " park" : "",
107 HCC_64BIT_ADDR(params) ? " 64 bit addr" : "",
108 HCC_LPM(params) ? " LPM" : "",
109 HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "",
110 HCC_HW_PREFETCH(params) ? " hw prefetch" : "",
111 HCC_32FRAME_PERIODIC_LIST(params) ?
112 " 32 peridic list" : "");
113 }
114 }
115 #else
116
117 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
118
119 #endif
120
121 #ifdef DEBUG
122
123 static void __maybe_unused
124 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
125 {
126 ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
127 hc32_to_cpup(ehci, &qtd->hw_next),
128 hc32_to_cpup(ehci, &qtd->hw_alt_next),
129 hc32_to_cpup(ehci, &qtd->hw_token),
130 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
131 if (qtd->hw_buf [1])
132 ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n",
133 hc32_to_cpup(ehci, &qtd->hw_buf[1]),
134 hc32_to_cpup(ehci, &qtd->hw_buf[2]),
135 hc32_to_cpup(ehci, &qtd->hw_buf[3]),
136 hc32_to_cpup(ehci, &qtd->hw_buf[4]));
137 }
138
139 static void __maybe_unused
140 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
141 {
142 struct ehci_qh_hw *hw = qh->hw;
143
144 ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
145 qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current);
146 dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next);
147 }
148
149 static void __maybe_unused
150 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
151 {
152 ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
153 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
154 itd->urb);
155 ehci_dbg (ehci,
156 " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
157 hc32_to_cpu(ehci, itd->hw_transaction[0]),
158 hc32_to_cpu(ehci, itd->hw_transaction[1]),
159 hc32_to_cpu(ehci, itd->hw_transaction[2]),
160 hc32_to_cpu(ehci, itd->hw_transaction[3]),
161 hc32_to_cpu(ehci, itd->hw_transaction[4]),
162 hc32_to_cpu(ehci, itd->hw_transaction[5]),
163 hc32_to_cpu(ehci, itd->hw_transaction[6]),
164 hc32_to_cpu(ehci, itd->hw_transaction[7]));
165 ehci_dbg (ehci,
166 " buf: %08x %08x %08x %08x %08x %08x %08x\n",
167 hc32_to_cpu(ehci, itd->hw_bufp[0]),
168 hc32_to_cpu(ehci, itd->hw_bufp[1]),
169 hc32_to_cpu(ehci, itd->hw_bufp[2]),
170 hc32_to_cpu(ehci, itd->hw_bufp[3]),
171 hc32_to_cpu(ehci, itd->hw_bufp[4]),
172 hc32_to_cpu(ehci, itd->hw_bufp[5]),
173 hc32_to_cpu(ehci, itd->hw_bufp[6]));
174 ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n",
175 itd->index[0], itd->index[1], itd->index[2],
176 itd->index[3], itd->index[4], itd->index[5],
177 itd->index[6], itd->index[7]);
178 }
179
180 static void __maybe_unused
181 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
182 {
183 ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
184 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
185 sitd->urb);
186 ehci_dbg (ehci,
187 " addr %08x sched %04x result %08x buf %08x %08x\n",
188 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
189 hc32_to_cpu(ehci, sitd->hw_uframe),
190 hc32_to_cpu(ehci, sitd->hw_results),
191 hc32_to_cpu(ehci, sitd->hw_buf[0]),
192 hc32_to_cpu(ehci, sitd->hw_buf[1]));
193 }
194
195 static int __maybe_unused
196 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
197 {
198 return scnprintf (buf, len,
199 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s",
200 label, label [0] ? " " : "", status,
201 (status & STS_PPCE_MASK) ? " PPCE" : "",
202 (status & STS_ASS) ? " Async" : "",
203 (status & STS_PSS) ? " Periodic" : "",
204 (status & STS_RECL) ? " Recl" : "",
205 (status & STS_HALT) ? " Halt" : "",
206 (status & STS_IAA) ? " IAA" : "",
207 (status & STS_FATAL) ? " FATAL" : "",
208 (status & STS_FLR) ? " FLR" : "",
209 (status & STS_PCD) ? " PCD" : "",
210 (status & STS_ERR) ? " ERR" : "",
211 (status & STS_INT) ? " INT" : ""
212 );
213 }
214
215 static int __maybe_unused
216 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
217 {
218 return scnprintf (buf, len,
219 "%s%sintrenable %02x%s%s%s%s%s%s%s",
220 label, label [0] ? " " : "", enable,
221 (enable & STS_PPCE_MASK) ? " PPCE" : "",
222 (enable & STS_IAA) ? " IAA" : "",
223 (enable & STS_FATAL) ? " FATAL" : "",
224 (enable & STS_FLR) ? " FLR" : "",
225 (enable & STS_PCD) ? " PCD" : "",
226 (enable & STS_ERR) ? " ERR" : "",
227 (enable & STS_INT) ? " INT" : ""
228 );
229 }
230
231 static const char *const fls_strings [] =
232 { "1024", "512", "256", "??" };
233
234 static int
235 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
236 {
237 return scnprintf (buf, len,
238 "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s "
239 "period=%s%s %s",
240 label, label [0] ? " " : "", command,
241 (command & CMD_HIRD) ? " HIRD" : "",
242 (command & CMD_PPCEE) ? " PPCEE" : "",
243 (command & CMD_FSP) ? " FSP" : "",
244 (command & CMD_ASPE) ? " ASPE" : "",
245 (command & CMD_PSPE) ? " PSPE" : "",
246 (command & CMD_PARK) ? " park" : "(park)",
247 CMD_PARK_CNT (command),
248 (command >> 16) & 0x3f,
249 (command & CMD_LRESET) ? " LReset" : "",
250 (command & CMD_IAAD) ? " IAAD" : "",
251 (command & CMD_ASE) ? " Async" : "",
252 (command & CMD_PSE) ? " Periodic" : "",
253 fls_strings [(command >> 2) & 0x3],
254 (command & CMD_RESET) ? " Reset" : "",
255 (command & CMD_RUN) ? "RUN" : "HALT"
256 );
257 }
258
259 static int
260 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
261 {
262 char *sig;
263
264 /* signaling state */
265 switch (status & (3 << 10)) {
266 case 0 << 10: sig = "se0"; break;
267 case 1 << 10: sig = "k"; break; /* low speed */
268 case 2 << 10: sig = "j"; break;
269 default: sig = "?"; break;
270 }
271
272 return scnprintf (buf, len,
273 "%s%sport:%d status %06x %d %s%s%s%s%s%s "
274 "sig=%s%s%s%s%s%s%s%s%s%s%s",
275 label, label [0] ? " " : "", port, status,
276 status>>25,/*device address */
277 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ?
278 " ACK" : "",
279 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ?
280 " NYET" : "",
281 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ?
282 " STALL" : "",
283 (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ?
284 " ERR" : "",
285 (status & PORT_POWER) ? " POWER" : "",
286 (status & PORT_OWNER) ? " OWNER" : "",
287 sig,
288 (status & PORT_LPM) ? " LPM" : "",
289 (status & PORT_RESET) ? " RESET" : "",
290 (status & PORT_SUSPEND) ? " SUSPEND" : "",
291 (status & PORT_RESUME) ? " RESUME" : "",
292 (status & PORT_OCC) ? " OCC" : "",
293 (status & PORT_OC) ? " OC" : "",
294 (status & PORT_PEC) ? " PEC" : "",
295 (status & PORT_PE) ? " PE" : "",
296 (status & PORT_CSC) ? " CSC" : "",
297 (status & PORT_CONNECT) ? " CONNECT" : "");
298 }
299
300 #else
301 static inline void __maybe_unused
302 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
303 {}
304
305 static inline int __maybe_unused
306 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
307 { return 0; }
308
309 static inline int __maybe_unused
310 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
311 { return 0; }
312
313 static inline int __maybe_unused
314 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
315 { return 0; }
316
317 static inline int __maybe_unused
318 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
319 { return 0; }
320
321 #endif /* DEBUG */
322
323 /* functions have the "wrong" filename when they're output... */
324 #define dbg_status(ehci, label, status) { \
325 char _buf [80]; \
326 dbg_status_buf (_buf, sizeof _buf, label, status); \
327 ehci_dbg (ehci, "%s\n", _buf); \
328 }
329
330 #define dbg_cmd(ehci, label, command) { \
331 char _buf [80]; \
332 dbg_command_buf (_buf, sizeof _buf, label, command); \
333 ehci_dbg (ehci, "%s\n", _buf); \
334 }
335
336 #define dbg_port(ehci, label, port, status) { \
337 char _buf [80]; \
338 dbg_port_buf (_buf, sizeof _buf, label, port, status); \
339 ehci_dbg (ehci, "%s\n", _buf); \
340 }
341
342 /*-------------------------------------------------------------------------*/
343
344 #ifdef STUB_DEBUG_FILES
345
346 static inline void create_debug_files (struct ehci_hcd *bus) { }
347 static inline void remove_debug_files (struct ehci_hcd *bus) { }
348
349 #else
350
351 /* troubleshooting help: expose state in debugfs */
352
353 static int debug_async_open(struct inode *, struct file *);
354 static int debug_periodic_open(struct inode *, struct file *);
355 static int debug_registers_open(struct inode *, struct file *);
356 static int debug_async_open(struct inode *, struct file *);
357 static int debug_lpm_open(struct inode *, struct file *);
358 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
359 size_t count, loff_t *ppos);
360 static ssize_t debug_lpm_write(struct file *file, const char __user *buffer,
361 size_t count, loff_t *ppos);
362 static int debug_lpm_close(struct inode *inode, struct file *file);
363
364 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
365 static int debug_close(struct inode *, struct file *);
366
367 static const struct file_operations debug_async_fops = {
368 .owner = THIS_MODULE,
369 .open = debug_async_open,
370 .read = debug_output,
371 .release = debug_close,
372 };
373 static const struct file_operations debug_periodic_fops = {
374 .owner = THIS_MODULE,
375 .open = debug_periodic_open,
376 .read = debug_output,
377 .release = debug_close,
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 };
385 static const struct file_operations debug_lpm_fops = {
386 .owner = THIS_MODULE,
387 .open = debug_lpm_open,
388 .read = debug_lpm_read,
389 .write = debug_lpm_write,
390 .release = debug_lpm_close,
391 };
392
393 static struct dentry *ehci_debug_root;
394
395 struct debug_buffer {
396 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
397 struct usb_bus *bus;
398 struct mutex mutex; /* protect filling of buffer */
399 size_t count; /* number of characters filled into buffer */
400 char *output_buf;
401 size_t alloc_size;
402 };
403
404 #define speed_char(info1) ({ char tmp; \
405 switch (info1 & (3 << 12)) { \
406 case 0 << 12: tmp = 'f'; break; \
407 case 1 << 12: tmp = 'l'; break; \
408 case 2 << 12: tmp = 'h'; break; \
409 default: tmp = '?'; break; \
410 }; tmp; })
411
412 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
413 {
414 __u32 v = hc32_to_cpu(ehci, token);
415
416 if (v & QTD_STS_ACTIVE)
417 return '*';
418 if (v & QTD_STS_HALT)
419 return '-';
420 if (!IS_SHORT_READ (v))
421 return ' ';
422 /* tries to advance through hw_alt_next */
423 return '/';
424 }
425
426 static void qh_lines (
427 struct ehci_hcd *ehci,
428 struct ehci_qh *qh,
429 char **nextp,
430 unsigned *sizep
431 )
432 {
433 u32 scratch;
434 u32 hw_curr;
435 struct list_head *entry;
436 struct ehci_qtd *td;
437 unsigned temp;
438 unsigned size = *sizep;
439 char *next = *nextp;
440 char mark;
441 __le32 list_end = EHCI_LIST_END(ehci);
442 struct ehci_qh_hw *hw = qh->hw;
443
444 if (hw->hw_qtd_next == list_end) /* NEC does this */
445 mark = '@';
446 else
447 mark = token_mark(ehci, hw->hw_token);
448 if (mark == '/') { /* qh_alt_next controls qh advance? */
449 if ((hw->hw_alt_next & QTD_MASK(ehci))
450 == ehci->async->hw->hw_alt_next)
451 mark = '#'; /* blocked */
452 else if (hw->hw_alt_next == list_end)
453 mark = '.'; /* use hw_qtd_next */
454 /* else alt_next points to some other qtd */
455 }
456 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
457 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
458 temp = scnprintf (next, size,
459 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
460 qh, scratch & 0x007f,
461 speed_char (scratch),
462 (scratch >> 8) & 0x000f,
463 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
464 hc32_to_cpup(ehci, &hw->hw_token), mark,
465 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
466 ? "data1" : "data0",
467 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
468 size -= temp;
469 next += temp;
470
471 /* hc may be modifying the list as we read it ... */
472 list_for_each (entry, &qh->qtd_list) {
473 td = list_entry (entry, struct ehci_qtd, qtd_list);
474 scratch = hc32_to_cpup(ehci, &td->hw_token);
475 mark = ' ';
476 if (hw_curr == td->qtd_dma)
477 mark = '*';
478 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
479 mark = '+';
480 else if (QTD_LENGTH (scratch)) {
481 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
482 mark = '#';
483 else if (td->hw_alt_next != list_end)
484 mark = '/';
485 }
486 temp = snprintf (next, size,
487 "\n\t%p%c%s len=%d %08x urb %p",
488 td, mark, ({ char *tmp;
489 switch ((scratch>>8)&0x03) {
490 case 0: tmp = "out"; break;
491 case 1: tmp = "in"; break;
492 case 2: tmp = "setup"; break;
493 default: tmp = "?"; break;
494 } tmp;}),
495 (scratch >> 16) & 0x7fff,
496 scratch,
497 td->urb);
498 if (size < temp)
499 temp = size;
500 size -= temp;
501 next += temp;
502 if (temp == size)
503 goto done;
504 }
505
506 temp = snprintf (next, size, "\n");
507 if (size < temp)
508 temp = size;
509 size -= temp;
510 next += temp;
511
512 done:
513 *sizep = size;
514 *nextp = next;
515 }
516
517 static ssize_t fill_async_buffer(struct debug_buffer *buf)
518 {
519 struct usb_hcd *hcd;
520 struct ehci_hcd *ehci;
521 unsigned long flags;
522 unsigned temp, size;
523 char *next;
524 struct ehci_qh *qh;
525
526 hcd = bus_to_hcd(buf->bus);
527 ehci = hcd_to_ehci (hcd);
528 next = buf->output_buf;
529 size = buf->alloc_size;
530
531 *next = 0;
532
533 /* dumps a snapshot of the async schedule.
534 * usually empty except for long-term bulk reads, or head.
535 * one QH per line, and TDs we know about
536 */
537 spin_lock_irqsave (&ehci->lock, flags);
538 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
539 qh_lines (ehci, qh, &next, &size);
540 if (ehci->reclaim && size > 0) {
541 temp = scnprintf (next, size, "\nreclaim =\n");
542 size -= temp;
543 next += temp;
544
545 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
546 qh_lines (ehci, qh, &next, &size);
547 }
548 spin_unlock_irqrestore (&ehci->lock, flags);
549
550 return strlen(buf->output_buf);
551 }
552
553 #define DBG_SCHED_LIMIT 64
554 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
555 {
556 struct usb_hcd *hcd;
557 struct ehci_hcd *ehci;
558 unsigned long flags;
559 union ehci_shadow p, *seen;
560 unsigned temp, size, seen_count;
561 char *next;
562 unsigned i;
563 __hc32 tag;
564
565 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
566 return 0;
567 seen_count = 0;
568
569 hcd = bus_to_hcd(buf->bus);
570 ehci = hcd_to_ehci (hcd);
571 next = buf->output_buf;
572 size = buf->alloc_size;
573
574 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
575 size -= temp;
576 next += temp;
577
578 /* dump a snapshot of the periodic schedule.
579 * iso changes, interrupt usually doesn't.
580 */
581 spin_lock_irqsave (&ehci->lock, flags);
582 for (i = 0; i < ehci->periodic_size; i++) {
583 p = ehci->pshadow [i];
584 if (likely (!p.ptr))
585 continue;
586 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
587
588 temp = scnprintf (next, size, "%4d: ", i);
589 size -= temp;
590 next += temp;
591
592 do {
593 struct ehci_qh_hw *hw;
594
595 switch (hc32_to_cpu(ehci, tag)) {
596 case Q_TYPE_QH:
597 hw = p.qh->hw;
598 temp = scnprintf (next, size, " qh%d-%04x/%p",
599 p.qh->period,
600 hc32_to_cpup(ehci,
601 &hw->hw_info2)
602 /* uframe masks */
603 & (QH_CMASK | QH_SMASK),
604 p.qh);
605 size -= temp;
606 next += temp;
607 /* don't repeat what follows this qh */
608 for (temp = 0; temp < seen_count; temp++) {
609 if (seen [temp].ptr != p.ptr)
610 continue;
611 if (p.qh->qh_next.ptr) {
612 temp = scnprintf (next, size,
613 " ...");
614 size -= temp;
615 next += temp;
616 }
617 break;
618 }
619 /* show more info the first time around */
620 if (temp == seen_count) {
621 u32 scratch = hc32_to_cpup(ehci,
622 &hw->hw_info1);
623 struct ehci_qtd *qtd;
624 char *type = "";
625
626 /* count tds, get ep direction */
627 temp = 0;
628 list_for_each_entry (qtd,
629 &p.qh->qtd_list,
630 qtd_list) {
631 temp++;
632 switch (0x03 & (hc32_to_cpu(
633 ehci,
634 qtd->hw_token) >> 8)) {
635 case 0: type = "out"; continue;
636 case 1: type = "in"; continue;
637 }
638 }
639
640 temp = scnprintf (next, size,
641 " (%c%d ep%d%s "
642 "[%d/%d] q%d p%d)",
643 speed_char (scratch),
644 scratch & 0x007f,
645 (scratch >> 8) & 0x000f, type,
646 p.qh->usecs, p.qh->c_usecs,
647 temp,
648 0x7ff & (scratch >> 16));
649
650 if (seen_count < DBG_SCHED_LIMIT)
651 seen [seen_count++].qh = p.qh;
652 } else
653 temp = 0;
654 if (p.qh) {
655 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
656 p = p.qh->qh_next;
657 }
658 break;
659 case Q_TYPE_FSTN:
660 temp = scnprintf (next, size,
661 " fstn-%8x/%p", p.fstn->hw_prev,
662 p.fstn);
663 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
664 p = p.fstn->fstn_next;
665 break;
666 case Q_TYPE_ITD:
667 temp = scnprintf (next, size,
668 " itd/%p", p.itd);
669 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
670 p = p.itd->itd_next;
671 break;
672 case Q_TYPE_SITD:
673 temp = scnprintf (next, size,
674 " sitd%d-%04x/%p",
675 p.sitd->stream->interval,
676 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
677 & 0x0000ffff,
678 p.sitd);
679 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
680 p = p.sitd->sitd_next;
681 break;
682 }
683 size -= temp;
684 next += temp;
685 } while (p.ptr);
686
687 temp = scnprintf (next, size, "\n");
688 size -= temp;
689 next += temp;
690 }
691 spin_unlock_irqrestore (&ehci->lock, flags);
692 kfree (seen);
693
694 return buf->alloc_size - size;
695 }
696 #undef DBG_SCHED_LIMIT
697
698 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
699 {
700 struct usb_hcd *hcd;
701 struct ehci_hcd *ehci;
702 unsigned long flags;
703 unsigned temp, size, i;
704 char *next, scratch [80];
705 static char fmt [] = "%*s\n";
706 static char label [] = "";
707
708 hcd = bus_to_hcd(buf->bus);
709 ehci = hcd_to_ehci (hcd);
710 next = buf->output_buf;
711 size = buf->alloc_size;
712
713 spin_lock_irqsave (&ehci->lock, flags);
714
715 if (!HCD_HW_ACCESSIBLE(hcd)) {
716 size = scnprintf (next, size,
717 "bus %s, device %s\n"
718 "%s\n"
719 "SUSPENDED (no register access)\n",
720 hcd->self.controller->bus->name,
721 dev_name(hcd->self.controller),
722 hcd->product_desc);
723 goto done;
724 }
725
726 /* Capability Registers */
727 i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
728 temp = scnprintf (next, size,
729 "bus %s, device %s\n"
730 "%s\n"
731 "EHCI %x.%02x, hcd state %d\n",
732 hcd->self.controller->bus->name,
733 dev_name(hcd->self.controller),
734 hcd->product_desc,
735 i >> 8, i & 0x0ff, hcd->state);
736 size -= temp;
737 next += temp;
738
739 #ifdef CONFIG_PCI
740 /* EHCI 0.96 and later may have "extended capabilities" */
741 if (hcd->self.controller->bus == &pci_bus_type) {
742 struct pci_dev *pdev;
743 u32 offset, cap, cap2;
744 unsigned count = 256/4;
745
746 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
747 offset = HCC_EXT_CAPS(ehci_readl(ehci,
748 &ehci->caps->hcc_params));
749 while (offset && count--) {
750 pci_read_config_dword (pdev, offset, &cap);
751 switch (cap & 0xff) {
752 case 1:
753 temp = scnprintf (next, size,
754 "ownership %08x%s%s\n", cap,
755 (cap & (1 << 24)) ? " linux" : "",
756 (cap & (1 << 16)) ? " firmware" : "");
757 size -= temp;
758 next += temp;
759
760 offset += 4;
761 pci_read_config_dword (pdev, offset, &cap2);
762 temp = scnprintf (next, size,
763 "SMI sts/enable 0x%08x\n", cap2);
764 size -= temp;
765 next += temp;
766 break;
767 case 0: /* illegal reserved capability */
768 cap = 0;
769 /* FALLTHROUGH */
770 default: /* unknown */
771 break;
772 }
773 temp = (cap >> 8) & 0xff;
774 }
775 }
776 #endif
777
778 // FIXME interpret both types of params
779 i = ehci_readl(ehci, &ehci->caps->hcs_params);
780 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
781 size -= temp;
782 next += temp;
783
784 i = ehci_readl(ehci, &ehci->caps->hcc_params);
785 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
786 size -= temp;
787 next += temp;
788
789 /* Operational Registers */
790 temp = dbg_status_buf (scratch, sizeof scratch, label,
791 ehci_readl(ehci, &ehci->regs->status));
792 temp = scnprintf (next, size, fmt, temp, scratch);
793 size -= temp;
794 next += temp;
795
796 temp = dbg_command_buf (scratch, sizeof scratch, label,
797 ehci_readl(ehci, &ehci->regs->command));
798 temp = scnprintf (next, size, fmt, temp, scratch);
799 size -= temp;
800 next += temp;
801
802 temp = dbg_intr_buf (scratch, sizeof scratch, label,
803 ehci_readl(ehci, &ehci->regs->intr_enable));
804 temp = scnprintf (next, size, fmt, temp, scratch);
805 size -= temp;
806 next += temp;
807
808 temp = scnprintf (next, size, "uframe %04x\n",
809 ehci_readl(ehci, &ehci->regs->frame_index));
810 size -= temp;
811 next += temp;
812
813 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
814 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
815 ehci_readl(ehci,
816 &ehci->regs->port_status[i - 1]));
817 temp = scnprintf (next, size, fmt, temp, scratch);
818 size -= temp;
819 next += temp;
820 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
821 temp = scnprintf (next, size,
822 " debug control %08x\n",
823 ehci_readl(ehci,
824 &ehci->debug->control));
825 size -= temp;
826 next += temp;
827 }
828 }
829
830 if (ehci->reclaim) {
831 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
832 size -= temp;
833 next += temp;
834 }
835
836 #ifdef EHCI_STATS
837 temp = scnprintf (next, size,
838 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
839 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
840 ehci->stats.lost_iaa);
841 size -= temp;
842 next += temp;
843
844 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
845 ehci->stats.complete, ehci->stats.unlink);
846 size -= temp;
847 next += temp;
848 #endif
849
850 done:
851 spin_unlock_irqrestore (&ehci->lock, flags);
852
853 return buf->alloc_size - size;
854 }
855
856 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
857 ssize_t (*fill_func)(struct debug_buffer *))
858 {
859 struct debug_buffer *buf;
860
861 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
862
863 if (buf) {
864 buf->bus = bus;
865 buf->fill_func = fill_func;
866 mutex_init(&buf->mutex);
867 buf->alloc_size = PAGE_SIZE;
868 }
869
870 return buf;
871 }
872
873 static int fill_buffer(struct debug_buffer *buf)
874 {
875 int ret = 0;
876
877 if (!buf->output_buf)
878 buf->output_buf = (char *)vmalloc(buf->alloc_size);
879
880 if (!buf->output_buf) {
881 ret = -ENOMEM;
882 goto out;
883 }
884
885 ret = buf->fill_func(buf);
886
887 if (ret >= 0) {
888 buf->count = ret;
889 ret = 0;
890 }
891
892 out:
893 return ret;
894 }
895
896 static ssize_t debug_output(struct file *file, char __user *user_buf,
897 size_t len, loff_t *offset)
898 {
899 struct debug_buffer *buf = file->private_data;
900 int ret = 0;
901
902 mutex_lock(&buf->mutex);
903 if (buf->count == 0) {
904 ret = fill_buffer(buf);
905 if (ret != 0) {
906 mutex_unlock(&buf->mutex);
907 goto out;
908 }
909 }
910 mutex_unlock(&buf->mutex);
911
912 ret = simple_read_from_buffer(user_buf, len, offset,
913 buf->output_buf, buf->count);
914
915 out:
916 return ret;
917
918 }
919
920 static int debug_close(struct inode *inode, struct file *file)
921 {
922 struct debug_buffer *buf = file->private_data;
923
924 if (buf) {
925 vfree(buf->output_buf);
926 kfree(buf);
927 }
928
929 return 0;
930 }
931 static int debug_async_open(struct inode *inode, struct file *file)
932 {
933 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
934
935 return file->private_data ? 0 : -ENOMEM;
936 }
937
938 static int debug_periodic_open(struct inode *inode, struct file *file)
939 {
940 struct debug_buffer *buf;
941 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
942 if (!buf)
943 return -ENOMEM;
944
945 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
946 file->private_data = buf;
947 return 0;
948 }
949
950 static int debug_registers_open(struct inode *inode, struct file *file)
951 {
952 file->private_data = alloc_buffer(inode->i_private,
953 fill_registers_buffer);
954
955 return file->private_data ? 0 : -ENOMEM;
956 }
957
958 static int debug_lpm_open(struct inode *inode, struct file *file)
959 {
960 file->private_data = inode->i_private;
961 return 0;
962 }
963
964 static int debug_lpm_close(struct inode *inode, struct file *file)
965 {
966 return 0;
967 }
968
969 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
970 size_t count, loff_t *ppos)
971 {
972 /* TODO: show lpm stats */
973 return 0;
974 }
975
976 static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
977 size_t count, loff_t *ppos)
978 {
979 struct usb_hcd *hcd;
980 struct ehci_hcd *ehci;
981 char buf[50];
982 size_t len;
983 u32 temp;
984 unsigned long port;
985 u32 __iomem *portsc ;
986 u32 params;
987
988 hcd = bus_to_hcd(file->private_data);
989 ehci = hcd_to_ehci(hcd);
990
991 len = min(count, sizeof(buf) - 1);
992 if (copy_from_user(buf, user_buf, len))
993 return -EFAULT;
994 buf[len] = '\0';
995 if (len > 0 && buf[len - 1] == '\n')
996 buf[len - 1] = '\0';
997
998 if (strncmp(buf, "enable", 5) == 0) {
999 if (strict_strtoul(buf + 7, 10, &port))
1000 return -EINVAL;
1001 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1002 if (port > HCS_N_PORTS(params)) {
1003 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1004 return -ENODEV;
1005 }
1006 portsc = &ehci->regs->port_status[port-1];
1007 temp = ehci_readl(ehci, portsc);
1008 if (!(temp & PORT_DEV_ADDR)) {
1009 ehci_dbg(ehci, "LPM: no device attached\n");
1010 return -ENODEV;
1011 }
1012 temp |= PORT_LPM;
1013 ehci_writel(ehci, temp, portsc);
1014 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1015 } else if (strncmp(buf, "hird=", 5) == 0) {
1016 unsigned long hird;
1017 if (strict_strtoul(buf + 5, 16, &hird))
1018 return -EINVAL;
1019 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1020 temp = ehci_readl(ehci, &ehci->regs->command);
1021 temp &= ~CMD_HIRD;
1022 temp |= hird << 24;
1023 ehci_writel(ehci, temp, &ehci->regs->command);
1024 } else if (strncmp(buf, "disable", 7) == 0) {
1025 if (strict_strtoul(buf + 8, 10, &port))
1026 return -EINVAL;
1027 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1028 if (port > HCS_N_PORTS(params)) {
1029 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1030 return -ENODEV;
1031 }
1032 portsc = &ehci->regs->port_status[port-1];
1033 temp = ehci_readl(ehci, portsc);
1034 if (!(temp & PORT_DEV_ADDR)) {
1035 ehci_dbg(ehci, "ERR: no device attached\n");
1036 return -ENODEV;
1037 }
1038 temp &= ~PORT_LPM;
1039 ehci_writel(ehci, temp, portsc);
1040 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1041 } else
1042 return -EOPNOTSUPP;
1043 return count;
1044 }
1045
1046 static inline void create_debug_files (struct ehci_hcd *ehci)
1047 {
1048 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1049
1050 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1051 if (!ehci->debug_dir)
1052 return;
1053
1054 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1055 &debug_async_fops))
1056 goto file_error;
1057
1058 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1059 &debug_periodic_fops))
1060 goto file_error;
1061
1062 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1063 &debug_registers_fops))
1064 goto file_error;
1065
1066 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUGO, ehci->debug_dir, bus,
1067 &debug_lpm_fops))
1068 goto file_error;
1069
1070 return;
1071
1072 file_error:
1073 debugfs_remove_recursive(ehci->debug_dir);
1074 }
1075
1076 static inline void remove_debug_files (struct ehci_hcd *ehci)
1077 {
1078 debugfs_remove_recursive(ehci->debug_dir);
1079 }
1080
1081 #endif /* STUB_DEBUG_FILES */
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