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proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / usb / host / ehci-dbg.c
blob3be238a24cc5fc3332aa857b4f21eb8d8a0b17eb
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 .llseek = default_llseek,
373 };
374 static const struct file_operations debug_periodic_fops = {
375 .owner = THIS_MODULE,
376 .open = debug_periodic_open,
377 .read = debug_output,
378 .release = debug_close,
379 .llseek = default_llseek,
380 };
381 static const struct file_operations debug_registers_fops = {
382 .owner = THIS_MODULE,
383 .open = debug_registers_open,
384 .read = debug_output,
385 .release = debug_close,
386 .llseek = default_llseek,
387 };
388 static const struct file_operations debug_lpm_fops = {
389 .owner = THIS_MODULE,
390 .open = debug_lpm_open,
391 .read = debug_lpm_read,
392 .write = debug_lpm_write,
393 .release = debug_lpm_close,
394 .llseek = noop_llseek,
395 };
396
397 static struct dentry *ehci_debug_root;
398
399 struct debug_buffer {
400 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
401 struct usb_bus *bus;
402 struct mutex mutex; /* protect filling of buffer */
403 size_t count; /* number of characters filled into buffer */
404 char *output_buf;
405 size_t alloc_size;
406 };
407
408 #define speed_char(info1) ({ char tmp; \
409 switch (info1 & (3 << 12)) { \
410 case 0 << 12: tmp = 'f'; break; \
411 case 1 << 12: tmp = 'l'; break; \
412 case 2 << 12: tmp = 'h'; break; \
413 default: tmp = '?'; break; \
414 }; tmp; })
415
416 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
417 {
418 __u32 v = hc32_to_cpu(ehci, token);
419
420 if (v & QTD_STS_ACTIVE)
421 return '*';
422 if (v & QTD_STS_HALT)
423 return '-';
424 if (!IS_SHORT_READ (v))
425 return ' ';
426 /* tries to advance through hw_alt_next */
427 return '/';
428 }
429
430 static void qh_lines (
431 struct ehci_hcd *ehci,
432 struct ehci_qh *qh,
433 char **nextp,
434 unsigned *sizep
435 )
436 {
437 u32 scratch;
438 u32 hw_curr;
439 struct list_head *entry;
440 struct ehci_qtd *td;
441 unsigned temp;
442 unsigned size = *sizep;
443 char *next = *nextp;
444 char mark;
445 __le32 list_end = EHCI_LIST_END(ehci);
446 struct ehci_qh_hw *hw = qh->hw;
447
448 if (hw->hw_qtd_next == list_end) /* NEC does this */
449 mark = '@';
450 else
451 mark = token_mark(ehci, hw->hw_token);
452 if (mark == '/') { /* qh_alt_next controls qh advance? */
453 if ((hw->hw_alt_next & QTD_MASK(ehci))
454 == ehci->async->hw->hw_alt_next)
455 mark = '#'; /* blocked */
456 else if (hw->hw_alt_next == list_end)
457 mark = '.'; /* use hw_qtd_next */
458 /* else alt_next points to some other qtd */
459 }
460 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
461 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
462 temp = scnprintf (next, size,
463 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
464 qh, scratch & 0x007f,
465 speed_char (scratch),
466 (scratch >> 8) & 0x000f,
467 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
468 hc32_to_cpup(ehci, &hw->hw_token), mark,
469 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
470 ? "data1" : "data0",
471 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
472 size -= temp;
473 next += temp;
474
475 /* hc may be modifying the list as we read it ... */
476 list_for_each (entry, &qh->qtd_list) {
477 td = list_entry (entry, struct ehci_qtd, qtd_list);
478 scratch = hc32_to_cpup(ehci, &td->hw_token);
479 mark = ' ';
480 if (hw_curr == td->qtd_dma)
481 mark = '*';
482 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
483 mark = '+';
484 else if (QTD_LENGTH (scratch)) {
485 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
486 mark = '#';
487 else if (td->hw_alt_next != list_end)
488 mark = '/';
489 }
490 temp = snprintf (next, size,
491 "\n\t%p%c%s len=%d %08x urb %p",
492 td, mark, ({ char *tmp;
493 switch ((scratch>>8)&0x03) {
494 case 0: tmp = "out"; break;
495 case 1: tmp = "in"; break;
496 case 2: tmp = "setup"; break;
497 default: tmp = "?"; break;
498 } tmp;}),
499 (scratch >> 16) & 0x7fff,
500 scratch,
501 td->urb);
502 if (size < temp)
503 temp = size;
504 size -= temp;
505 next += temp;
506 if (temp == size)
507 goto done;
508 }
509
510 temp = snprintf (next, size, "\n");
511 if (size < temp)
512 temp = size;
513 size -= temp;
514 next += temp;
515
516 done:
517 *sizep = size;
518 *nextp = next;
519 }
520
521 static ssize_t fill_async_buffer(struct debug_buffer *buf)
522 {
523 struct usb_hcd *hcd;
524 struct ehci_hcd *ehci;
525 unsigned long flags;
526 unsigned temp, size;
527 char *next;
528 struct ehci_qh *qh;
529
530 hcd = bus_to_hcd(buf->bus);
531 ehci = hcd_to_ehci (hcd);
532 next = buf->output_buf;
533 size = buf->alloc_size;
534
535 *next = 0;
536
537 /* dumps a snapshot of the async schedule.
538 * usually empty except for long-term bulk reads, or head.
539 * one QH per line, and TDs we know about
540 */
541 spin_lock_irqsave (&ehci->lock, flags);
542 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
543 qh_lines (ehci, qh, &next, &size);
544 if (ehci->reclaim && size > 0) {
545 temp = scnprintf (next, size, "\nreclaim =\n");
546 size -= temp;
547 next += temp;
548
549 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
550 qh_lines (ehci, qh, &next, &size);
551 }
552 spin_unlock_irqrestore (&ehci->lock, flags);
553
554 return strlen(buf->output_buf);
555 }
556
557 #define DBG_SCHED_LIMIT 64
558 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
559 {
560 struct usb_hcd *hcd;
561 struct ehci_hcd *ehci;
562 unsigned long flags;
563 union ehci_shadow p, *seen;
564 unsigned temp, size, seen_count;
565 char *next;
566 unsigned i;
567 __hc32 tag;
568
569 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
570 return 0;
571 seen_count = 0;
572
573 hcd = bus_to_hcd(buf->bus);
574 ehci = hcd_to_ehci (hcd);
575 next = buf->output_buf;
576 size = buf->alloc_size;
577
578 temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
579 size -= temp;
580 next += temp;
581
582 /* dump a snapshot of the periodic schedule.
583 * iso changes, interrupt usually doesn't.
584 */
585 spin_lock_irqsave (&ehci->lock, flags);
586 for (i = 0; i < ehci->periodic_size; i++) {
587 p = ehci->pshadow [i];
588 if (likely (!p.ptr))
589 continue;
590 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
591
592 temp = scnprintf (next, size, "%4d: ", i);
593 size -= temp;
594 next += temp;
595
596 do {
597 struct ehci_qh_hw *hw;
598
599 switch (hc32_to_cpu(ehci, tag)) {
600 case Q_TYPE_QH:
601 hw = p.qh->hw;
602 temp = scnprintf (next, size, " qh%d-%04x/%p",
603 p.qh->period,
604 hc32_to_cpup(ehci,
605 &hw->hw_info2)
606 /* uframe masks */
607 & (QH_CMASK | QH_SMASK),
608 p.qh);
609 size -= temp;
610 next += temp;
611 /* don't repeat what follows this qh */
612 for (temp = 0; temp < seen_count; temp++) {
613 if (seen [temp].ptr != p.ptr)
614 continue;
615 if (p.qh->qh_next.ptr) {
616 temp = scnprintf (next, size,
617 " ...");
618 size -= temp;
619 next += temp;
620 }
621 break;
622 }
623 /* show more info the first time around */
624 if (temp == seen_count) {
625 u32 scratch = hc32_to_cpup(ehci,
626 &hw->hw_info1);
627 struct ehci_qtd *qtd;
628 char *type = "";
629
630 /* count tds, get ep direction */
631 temp = 0;
632 list_for_each_entry (qtd,
633 &p.qh->qtd_list,
634 qtd_list) {
635 temp++;
636 switch (0x03 & (hc32_to_cpu(
637 ehci,
638 qtd->hw_token) >> 8)) {
639 case 0: type = "out"; continue;
640 case 1: type = "in"; continue;
641 }
642 }
643
644 temp = scnprintf (next, size,
645 " (%c%d ep%d%s "
646 "[%d/%d] q%d p%d)",
647 speed_char (scratch),
648 scratch & 0x007f,
649 (scratch >> 8) & 0x000f, type,
650 p.qh->usecs, p.qh->c_usecs,
651 temp,
652 0x7ff & (scratch >> 16));
653
654 if (seen_count < DBG_SCHED_LIMIT)
655 seen [seen_count++].qh = p.qh;
656 } else
657 temp = 0;
658 if (p.qh) {
659 tag = Q_NEXT_TYPE(ehci, hw->hw_next);
660 p = p.qh->qh_next;
661 }
662 break;
663 case Q_TYPE_FSTN:
664 temp = scnprintf (next, size,
665 " fstn-%8x/%p", p.fstn->hw_prev,
666 p.fstn);
667 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
668 p = p.fstn->fstn_next;
669 break;
670 case Q_TYPE_ITD:
671 temp = scnprintf (next, size,
672 " itd/%p", p.itd);
673 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
674 p = p.itd->itd_next;
675 break;
676 case Q_TYPE_SITD:
677 temp = scnprintf (next, size,
678 " sitd%d-%04x/%p",
679 p.sitd->stream->interval,
680 hc32_to_cpup(ehci, &p.sitd->hw_uframe)
681 & 0x0000ffff,
682 p.sitd);
683 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
684 p = p.sitd->sitd_next;
685 break;
686 }
687 size -= temp;
688 next += temp;
689 } while (p.ptr);
690
691 temp = scnprintf (next, size, "\n");
692 size -= temp;
693 next += temp;
694 }
695 spin_unlock_irqrestore (&ehci->lock, flags);
696 kfree (seen);
697
698 return buf->alloc_size - size;
699 }
700 #undef DBG_SCHED_LIMIT
701
702 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
703 {
704 struct usb_hcd *hcd;
705 struct ehci_hcd *ehci;
706 unsigned long flags;
707 unsigned temp, size, i;
708 char *next, scratch [80];
709 static char fmt [] = "%*s\n";
710 static char label [] = "";
711
712 hcd = bus_to_hcd(buf->bus);
713 ehci = hcd_to_ehci (hcd);
714 next = buf->output_buf;
715 size = buf->alloc_size;
716
717 spin_lock_irqsave (&ehci->lock, flags);
718
719 if (!HCD_HW_ACCESSIBLE(hcd)) {
720 size = scnprintf (next, size,
721 "bus %s, device %s\n"
722 "%s\n"
723 "SUSPENDED (no register access)\n",
724 hcd->self.controller->bus->name,
725 dev_name(hcd->self.controller),
726 hcd->product_desc);
727 goto done;
728 }
729
730 /* Capability Registers */
731 i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
732 temp = scnprintf (next, size,
733 "bus %s, device %s\n"
734 "%s\n"
735 "EHCI %x.%02x, hcd state %d\n",
736 hcd->self.controller->bus->name,
737 dev_name(hcd->self.controller),
738 hcd->product_desc,
739 i >> 8, i & 0x0ff, hcd->state);
740 size -= temp;
741 next += temp;
742
743 #ifdef CONFIG_PCI
744 /* EHCI 0.96 and later may have "extended capabilities" */
745 if (hcd->self.controller->bus == &pci_bus_type) {
746 struct pci_dev *pdev;
747 u32 offset, cap, cap2;
748 unsigned count = 256/4;
749
750 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
751 offset = HCC_EXT_CAPS(ehci_readl(ehci,
752 &ehci->caps->hcc_params));
753 while (offset && count--) {
754 pci_read_config_dword (pdev, offset, &cap);
755 switch (cap & 0xff) {
756 case 1:
757 temp = scnprintf (next, size,
758 "ownership %08x%s%s\n", cap,
759 (cap & (1 << 24)) ? " linux" : "",
760 (cap & (1 << 16)) ? " firmware" : "");
761 size -= temp;
762 next += temp;
763
764 offset += 4;
765 pci_read_config_dword (pdev, offset, &cap2);
766 temp = scnprintf (next, size,
767 "SMI sts/enable 0x%08x\n", cap2);
768 size -= temp;
769 next += temp;
770 break;
771 case 0: /* illegal reserved capability */
772 cap = 0;
773 /* FALLTHROUGH */
774 default: /* unknown */
775 break;
776 }
777 temp = (cap >> 8) & 0xff;
778 }
779 }
780 #endif
781
782 // FIXME interpret both types of params
783 i = ehci_readl(ehci, &ehci->caps->hcs_params);
784 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
785 size -= temp;
786 next += temp;
787
788 i = ehci_readl(ehci, &ehci->caps->hcc_params);
789 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
790 size -= temp;
791 next += temp;
792
793 /* Operational Registers */
794 temp = dbg_status_buf (scratch, sizeof scratch, label,
795 ehci_readl(ehci, &ehci->regs->status));
796 temp = scnprintf (next, size, fmt, temp, scratch);
797 size -= temp;
798 next += temp;
799
800 temp = dbg_command_buf (scratch, sizeof scratch, label,
801 ehci_readl(ehci, &ehci->regs->command));
802 temp = scnprintf (next, size, fmt, temp, scratch);
803 size -= temp;
804 next += temp;
805
806 temp = dbg_intr_buf (scratch, sizeof scratch, label,
807 ehci_readl(ehci, &ehci->regs->intr_enable));
808 temp = scnprintf (next, size, fmt, temp, scratch);
809 size -= temp;
810 next += temp;
811
812 temp = scnprintf (next, size, "uframe %04x\n",
813 ehci_readl(ehci, &ehci->regs->frame_index));
814 size -= temp;
815 next += temp;
816
817 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
818 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
819 ehci_readl(ehci,
820 &ehci->regs->port_status[i - 1]));
821 temp = scnprintf (next, size, fmt, temp, scratch);
822 size -= temp;
823 next += temp;
824 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
825 temp = scnprintf (next, size,
826 " debug control %08x\n",
827 ehci_readl(ehci,
828 &ehci->debug->control));
829 size -= temp;
830 next += temp;
831 }
832 }
833
834 if (ehci->reclaim) {
835 temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim);
836 size -= temp;
837 next += temp;
838 }
839
840 #ifdef EHCI_STATS
841 temp = scnprintf (next, size,
842 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
843 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
844 ehci->stats.lost_iaa);
845 size -= temp;
846 next += temp;
847
848 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
849 ehci->stats.complete, ehci->stats.unlink);
850 size -= temp;
851 next += temp;
852 #endif
853
854 done:
855 spin_unlock_irqrestore (&ehci->lock, flags);
856
857 return buf->alloc_size - size;
858 }
859
860 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
861 ssize_t (*fill_func)(struct debug_buffer *))
862 {
863 struct debug_buffer *buf;
864
865 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
866
867 if (buf) {
868 buf->bus = bus;
869 buf->fill_func = fill_func;
870 mutex_init(&buf->mutex);
871 buf->alloc_size = PAGE_SIZE;
872 }
873
874 return buf;
875 }
876
877 static int fill_buffer(struct debug_buffer *buf)
878 {
879 int ret = 0;
880
881 if (!buf->output_buf)
882 buf->output_buf = vmalloc(buf->alloc_size);
883
884 if (!buf->output_buf) {
885 ret = -ENOMEM;
886 goto out;
887 }
888
889 ret = buf->fill_func(buf);
890
891 if (ret >= 0) {
892 buf->count = ret;
893 ret = 0;
894 }
895
896 out:
897 return ret;
898 }
899
900 static ssize_t debug_output(struct file *file, char __user *user_buf,
901 size_t len, loff_t *offset)
902 {
903 struct debug_buffer *buf = file->private_data;
904 int ret = 0;
905
906 mutex_lock(&buf->mutex);
907 if (buf->count == 0) {
908 ret = fill_buffer(buf);
909 if (ret != 0) {
910 mutex_unlock(&buf->mutex);
911 goto out;
912 }
913 }
914 mutex_unlock(&buf->mutex);
915
916 ret = simple_read_from_buffer(user_buf, len, offset,
917 buf->output_buf, buf->count);
918
919 out:
920 return ret;
921
922 }
923
924 static int debug_close(struct inode *inode, struct file *file)
925 {
926 struct debug_buffer *buf = file->private_data;
927
928 if (buf) {
929 vfree(buf->output_buf);
930 kfree(buf);
931 }
932
933 return 0;
934 }
935 static int debug_async_open(struct inode *inode, struct file *file)
936 {
937 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
938
939 return file->private_data ? 0 : -ENOMEM;
940 }
941
942 static int debug_periodic_open(struct inode *inode, struct file *file)
943 {
944 struct debug_buffer *buf;
945 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
946 if (!buf)
947 return -ENOMEM;
948
949 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
950 file->private_data = buf;
951 return 0;
952 }
953
954 static int debug_registers_open(struct inode *inode, struct file *file)
955 {
956 file->private_data = alloc_buffer(inode->i_private,
957 fill_registers_buffer);
958
959 return file->private_data ? 0 : -ENOMEM;
960 }
961
962 static int debug_lpm_open(struct inode *inode, struct file *file)
963 {
964 file->private_data = inode->i_private;
965 return 0;
966 }
967
968 static int debug_lpm_close(struct inode *inode, struct file *file)
969 {
970 return 0;
971 }
972
973 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
974 size_t count, loff_t *ppos)
975 {
976 /* TODO: show lpm stats */
977 return 0;
978 }
979
980 static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
981 size_t count, loff_t *ppos)
982 {
983 struct usb_hcd *hcd;
984 struct ehci_hcd *ehci;
985 char buf[50];
986 size_t len;
987 u32 temp;
988 unsigned long port;
989 u32 __iomem *portsc ;
990 u32 params;
991
992 hcd = bus_to_hcd(file->private_data);
993 ehci = hcd_to_ehci(hcd);
994
995 len = min(count, sizeof(buf) - 1);
996 if (copy_from_user(buf, user_buf, len))
997 return -EFAULT;
998 buf[len] = '\0';
999 if (len > 0 && buf[len - 1] == '\n')
1000 buf[len - 1] = '\0';
1001
1002 if (strncmp(buf, "enable", 5) == 0) {
1003 if (strict_strtoul(buf + 7, 10, &port))
1004 return -EINVAL;
1005 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1006 if (port > HCS_N_PORTS(params)) {
1007 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1008 return -ENODEV;
1009 }
1010 portsc = &ehci->regs->port_status[port-1];
1011 temp = ehci_readl(ehci, portsc);
1012 if (!(temp & PORT_DEV_ADDR)) {
1013 ehci_dbg(ehci, "LPM: no device attached\n");
1014 return -ENODEV;
1015 }
1016 temp |= PORT_LPM;
1017 ehci_writel(ehci, temp, portsc);
1018 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1019 } else if (strncmp(buf, "hird=", 5) == 0) {
1020 unsigned long hird;
1021 if (strict_strtoul(buf + 5, 16, &hird))
1022 return -EINVAL;
1023 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1024 temp = ehci_readl(ehci, &ehci->regs->command);
1025 temp &= ~CMD_HIRD;
1026 temp |= hird << 24;
1027 ehci_writel(ehci, temp, &ehci->regs->command);
1028 } else if (strncmp(buf, "disable", 7) == 0) {
1029 if (strict_strtoul(buf + 8, 10, &port))
1030 return -EINVAL;
1031 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1032 if (port > HCS_N_PORTS(params)) {
1033 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1034 return -ENODEV;
1035 }
1036 portsc = &ehci->regs->port_status[port-1];
1037 temp = ehci_readl(ehci, portsc);
1038 if (!(temp & PORT_DEV_ADDR)) {
1039 ehci_dbg(ehci, "ERR: no device attached\n");
1040 return -ENODEV;
1041 }
1042 temp &= ~PORT_LPM;
1043 ehci_writel(ehci, temp, portsc);
1044 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1045 } else
1046 return -EOPNOTSUPP;
1047 return count;
1048 }
1049
1050 static inline void create_debug_files (struct ehci_hcd *ehci)
1051 {
1052 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1053
1054 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1055 if (!ehci->debug_dir)
1056 return;
1057
1058 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1059 &debug_async_fops))
1060 goto file_error;
1061
1062 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1063 &debug_periodic_fops))
1064 goto file_error;
1065
1066 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1067 &debug_registers_fops))
1068 goto file_error;
1069
1070 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus,
1071 &debug_lpm_fops))
1072 goto file_error;
1073
1074 return;
1075
1076 file_error:
1077 debugfs_remove_recursive(ehci->debug_dir);
1078 }
1079
1080 static inline void remove_debug_files (struct ehci_hcd *ehci)
1081 {
1082 debugfs_remove_recursive(ehci->debug_dir);
1083 }
1084
1085 #endif /* STUB_DEBUG_FILES */
linux-next