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ARM: orion: move platform_data definitions
[deliverable/linux.git] / drivers / usb / host / ehci-dbg.c
1 /*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 /* this file is part of ehci-hcd.c */
20
21 #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 periodic 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 ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
356 size_t count, loff_t *ppos);
357 static ssize_t debug_lpm_write(struct file *file, const char __user *buffer,
358 size_t count, loff_t *ppos);
359 static int debug_lpm_close(struct inode *inode, struct file *file);
360
361 static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
362 static int debug_close(struct inode *, struct file *);
363
364 static const struct file_operations debug_async_fops = {
365 .owner = THIS_MODULE,
366 .open = debug_async_open,
367 .read = debug_output,
368 .release = debug_close,
369 .llseek = default_llseek,
370 };
371 static const struct file_operations debug_periodic_fops = {
372 .owner = THIS_MODULE,
373 .open = debug_periodic_open,
374 .read = debug_output,
375 .release = debug_close,
376 .llseek = default_llseek,
377 };
378 static const struct file_operations debug_registers_fops = {
379 .owner = THIS_MODULE,
380 .open = debug_registers_open,
381 .read = debug_output,
382 .release = debug_close,
383 .llseek = default_llseek,
384 };
385 static const struct file_operations debug_lpm_fops = {
386 .owner = THIS_MODULE,
387 .open = simple_open,
388 .read = debug_lpm_read,
389 .write = debug_lpm_write,
390 .release = debug_lpm_close,
391 .llseek = noop_llseek,
392 };
393
394 static struct dentry *ehci_debug_root;
395
396 struct debug_buffer {
397 ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
398 struct usb_bus *bus;
399 struct mutex mutex; /* protect filling of buffer */
400 size_t count; /* number of characters filled into buffer */
401 char *output_buf;
402 size_t alloc_size;
403 };
404
405 #define speed_char(info1) ({ char tmp; \
406 switch (info1 & (3 << 12)) { \
407 case QH_FULL_SPEED: tmp = 'f'; break; \
408 case QH_LOW_SPEED: tmp = 'l'; break; \
409 case QH_HIGH_SPEED: tmp = 'h'; break; \
410 default: tmp = '?'; break; \
411 }; tmp; })
412
413 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
414 {
415 __u32 v = hc32_to_cpu(ehci, token);
416
417 if (v & QTD_STS_ACTIVE)
418 return '*';
419 if (v & QTD_STS_HALT)
420 return '-';
421 if (!IS_SHORT_READ (v))
422 return ' ';
423 /* tries to advance through hw_alt_next */
424 return '/';
425 }
426
427 static void qh_lines (
428 struct ehci_hcd *ehci,
429 struct ehci_qh *qh,
430 char **nextp,
431 unsigned *sizep
432 )
433 {
434 u32 scratch;
435 u32 hw_curr;
436 struct list_head *entry;
437 struct ehci_qtd *td;
438 unsigned temp;
439 unsigned size = *sizep;
440 char *next = *nextp;
441 char mark;
442 __le32 list_end = EHCI_LIST_END(ehci);
443 struct ehci_qh_hw *hw = qh->hw;
444
445 if (hw->hw_qtd_next == list_end) /* NEC does this */
446 mark = '@';
447 else
448 mark = token_mark(ehci, hw->hw_token);
449 if (mark == '/') { /* qh_alt_next controls qh advance? */
450 if ((hw->hw_alt_next & QTD_MASK(ehci))
451 == ehci->async->hw->hw_alt_next)
452 mark = '#'; /* blocked */
453 else if (hw->hw_alt_next == list_end)
454 mark = '.'; /* use hw_qtd_next */
455 /* else alt_next points to some other qtd */
456 }
457 scratch = hc32_to_cpup(ehci, &hw->hw_info1);
458 hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;
459 temp = scnprintf (next, size,
460 "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
461 qh, scratch & 0x007f,
462 speed_char (scratch),
463 (scratch >> 8) & 0x000f,
464 scratch, hc32_to_cpup(ehci, &hw->hw_info2),
465 hc32_to_cpup(ehci, &hw->hw_token), mark,
466 (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)
467 ? "data1" : "data0",
468 (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);
469 size -= temp;
470 next += temp;
471
472 /* hc may be modifying the list as we read it ... */
473 list_for_each (entry, &qh->qtd_list) {
474 td = list_entry (entry, struct ehci_qtd, qtd_list);
475 scratch = hc32_to_cpup(ehci, &td->hw_token);
476 mark = ' ';
477 if (hw_curr == td->qtd_dma)
478 mark = '*';
479 else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
480 mark = '+';
481 else if (QTD_LENGTH (scratch)) {
482 if (td->hw_alt_next == ehci->async->hw->hw_alt_next)
483 mark = '#';
484 else if (td->hw_alt_next != list_end)
485 mark = '/';
486 }
487 temp = snprintf (next, size,
488 "\n\t%p%c%s len=%d %08x urb %p",
489 td, mark, ({ char *tmp;
490 switch ((scratch>>8)&0x03) {
491 case 0: tmp = "out"; break;
492 case 1: tmp = "in"; break;
493 case 2: tmp = "setup"; break;
494 default: tmp = "?"; break;
495 } tmp;}),
496 (scratch >> 16) & 0x7fff,
497 scratch,
498 td->urb);
499 if (size < temp)
500 temp = size;
501 size -= temp;
502 next += temp;
503 if (temp == size)
504 goto done;
505 }
506
507 temp = snprintf (next, size, "\n");
508 if (size < temp)
509 temp = size;
510 size -= temp;
511 next += temp;
512
513 done:
514 *sizep = size;
515 *nextp = next;
516 }
517
518 static ssize_t fill_async_buffer(struct debug_buffer *buf)
519 {
520 struct usb_hcd *hcd;
521 struct ehci_hcd *ehci;
522 unsigned long flags;
523 unsigned temp, size;
524 char *next;
525 struct ehci_qh *qh;
526
527 hcd = bus_to_hcd(buf->bus);
528 ehci = hcd_to_ehci (hcd);
529 next = buf->output_buf;
530 size = buf->alloc_size;
531
532 *next = 0;
533
534 /* dumps a snapshot of the async schedule.
535 * usually empty except for long-term bulk reads, or head.
536 * one QH per line, and TDs we know about
537 */
538 spin_lock_irqsave (&ehci->lock, flags);
539 for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
540 qh_lines (ehci, qh, &next, &size);
541 if (ehci->async_unlink && size > 0) {
542 temp = scnprintf(next, size, "\nunlink =\n");
543 size -= temp;
544 next += temp;
545
546 for (qh = ehci->async_unlink; size > 0 && qh;
547 qh = qh->unlink_next)
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 case EHCI_RH_STOPPING:
710 return "stopping";
711 }
712 return "?";
713 }
714
715 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
716 {
717 struct usb_hcd *hcd;
718 struct ehci_hcd *ehci;
719 unsigned long flags;
720 unsigned temp, size, i;
721 char *next, scratch [80];
722 static char fmt [] = "%*s\n";
723 static char label [] = "";
724
725 hcd = bus_to_hcd(buf->bus);
726 ehci = hcd_to_ehci (hcd);
727 next = buf->output_buf;
728 size = buf->alloc_size;
729
730 spin_lock_irqsave (&ehci->lock, flags);
731
732 if (!HCD_HW_ACCESSIBLE(hcd)) {
733 size = scnprintf (next, size,
734 "bus %s, device %s\n"
735 "%s\n"
736 "SUSPENDED (no register access)\n",
737 hcd->self.controller->bus->name,
738 dev_name(hcd->self.controller),
739 hcd->product_desc);
740 goto done;
741 }
742
743 /* Capability Registers */
744 i = HC_VERSION(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
745 temp = scnprintf (next, size,
746 "bus %s, device %s\n"
747 "%s\n"
748 "EHCI %x.%02x, rh state %s\n",
749 hcd->self.controller->bus->name,
750 dev_name(hcd->self.controller),
751 hcd->product_desc,
752 i >> 8, i & 0x0ff, rh_state_string(ehci));
753 size -= temp;
754 next += temp;
755
756 #ifdef CONFIG_PCI
757 /* EHCI 0.96 and later may have "extended capabilities" */
758 if (hcd->self.controller->bus == &pci_bus_type) {
759 struct pci_dev *pdev;
760 u32 offset, cap, cap2;
761 unsigned count = 256/4;
762
763 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
764 offset = HCC_EXT_CAPS(ehci_readl(ehci,
765 &ehci->caps->hcc_params));
766 while (offset && count--) {
767 pci_read_config_dword (pdev, offset, &cap);
768 switch (cap & 0xff) {
769 case 1:
770 temp = scnprintf (next, size,
771 "ownership %08x%s%s\n", cap,
772 (cap & (1 << 24)) ? " linux" : "",
773 (cap & (1 << 16)) ? " firmware" : "");
774 size -= temp;
775 next += temp;
776
777 offset += 4;
778 pci_read_config_dword (pdev, offset, &cap2);
779 temp = scnprintf (next, size,
780 "SMI sts/enable 0x%08x\n", cap2);
781 size -= temp;
782 next += temp;
783 break;
784 case 0: /* illegal reserved capability */
785 cap = 0;
786 /* FALLTHROUGH */
787 default: /* unknown */
788 break;
789 }
790 temp = (cap >> 8) & 0xff;
791 }
792 }
793 #endif
794
795 // FIXME interpret both types of params
796 i = ehci_readl(ehci, &ehci->caps->hcs_params);
797 temp = scnprintf (next, size, "structural params 0x%08x\n", i);
798 size -= temp;
799 next += temp;
800
801 i = ehci_readl(ehci, &ehci->caps->hcc_params);
802 temp = scnprintf (next, size, "capability params 0x%08x\n", i);
803 size -= temp;
804 next += temp;
805
806 /* Operational Registers */
807 temp = dbg_status_buf (scratch, sizeof scratch, label,
808 ehci_readl(ehci, &ehci->regs->status));
809 temp = scnprintf (next, size, fmt, temp, scratch);
810 size -= temp;
811 next += temp;
812
813 temp = dbg_command_buf (scratch, sizeof scratch, label,
814 ehci_readl(ehci, &ehci->regs->command));
815 temp = scnprintf (next, size, fmt, temp, scratch);
816 size -= temp;
817 next += temp;
818
819 temp = dbg_intr_buf (scratch, sizeof scratch, label,
820 ehci_readl(ehci, &ehci->regs->intr_enable));
821 temp = scnprintf (next, size, fmt, temp, scratch);
822 size -= temp;
823 next += temp;
824
825 temp = scnprintf (next, size, "uframe %04x\n",
826 ehci_read_frame_index(ehci));
827 size -= temp;
828 next += temp;
829
830 for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
831 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
832 ehci_readl(ehci,
833 &ehci->regs->port_status[i - 1]));
834 temp = scnprintf (next, size, fmt, temp, scratch);
835 size -= temp;
836 next += temp;
837 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
838 temp = scnprintf (next, size,
839 " debug control %08x\n",
840 ehci_readl(ehci,
841 &ehci->debug->control));
842 size -= temp;
843 next += temp;
844 }
845 }
846
847 if (ehci->async_unlink) {
848 temp = scnprintf(next, size, "async unlink qh %p\n",
849 ehci->async_unlink);
850 size -= temp;
851 next += temp;
852 }
853
854 #ifdef EHCI_STATS
855 temp = scnprintf (next, size,
856 "irq normal %ld err %ld iaa %ld (lost %ld)\n",
857 ehci->stats.normal, ehci->stats.error, ehci->stats.iaa,
858 ehci->stats.lost_iaa);
859 size -= temp;
860 next += temp;
861
862 temp = scnprintf (next, size, "complete %ld unlink %ld\n",
863 ehci->stats.complete, ehci->stats.unlink);
864 size -= temp;
865 next += temp;
866 #endif
867
868 done:
869 spin_unlock_irqrestore (&ehci->lock, flags);
870
871 return buf->alloc_size - size;
872 }
873
874 static struct debug_buffer *alloc_buffer(struct usb_bus *bus,
875 ssize_t (*fill_func)(struct debug_buffer *))
876 {
877 struct debug_buffer *buf;
878
879 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
880
881 if (buf) {
882 buf->bus = bus;
883 buf->fill_func = fill_func;
884 mutex_init(&buf->mutex);
885 buf->alloc_size = PAGE_SIZE;
886 }
887
888 return buf;
889 }
890
891 static int fill_buffer(struct debug_buffer *buf)
892 {
893 int ret = 0;
894
895 if (!buf->output_buf)
896 buf->output_buf = vmalloc(buf->alloc_size);
897
898 if (!buf->output_buf) {
899 ret = -ENOMEM;
900 goto out;
901 }
902
903 ret = buf->fill_func(buf);
904
905 if (ret >= 0) {
906 buf->count = ret;
907 ret = 0;
908 }
909
910 out:
911 return ret;
912 }
913
914 static ssize_t debug_output(struct file *file, char __user *user_buf,
915 size_t len, loff_t *offset)
916 {
917 struct debug_buffer *buf = file->private_data;
918 int ret = 0;
919
920 mutex_lock(&buf->mutex);
921 if (buf->count == 0) {
922 ret = fill_buffer(buf);
923 if (ret != 0) {
924 mutex_unlock(&buf->mutex);
925 goto out;
926 }
927 }
928 mutex_unlock(&buf->mutex);
929
930 ret = simple_read_from_buffer(user_buf, len, offset,
931 buf->output_buf, buf->count);
932
933 out:
934 return ret;
935
936 }
937
938 static int debug_close(struct inode *inode, struct file *file)
939 {
940 struct debug_buffer *buf = file->private_data;
941
942 if (buf) {
943 vfree(buf->output_buf);
944 kfree(buf);
945 }
946
947 return 0;
948 }
949 static int debug_async_open(struct inode *inode, struct file *file)
950 {
951 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
952
953 return file->private_data ? 0 : -ENOMEM;
954 }
955
956 static int debug_periodic_open(struct inode *inode, struct file *file)
957 {
958 struct debug_buffer *buf;
959 buf = alloc_buffer(inode->i_private, fill_periodic_buffer);
960 if (!buf)
961 return -ENOMEM;
962
963 buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE;
964 file->private_data = buf;
965 return 0;
966 }
967
968 static int debug_registers_open(struct inode *inode, struct file *file)
969 {
970 file->private_data = alloc_buffer(inode->i_private,
971 fill_registers_buffer);
972
973 return file->private_data ? 0 : -ENOMEM;
974 }
975
976 static int debug_lpm_close(struct inode *inode, struct file *file)
977 {
978 return 0;
979 }
980
981 static ssize_t debug_lpm_read(struct file *file, char __user *user_buf,
982 size_t count, loff_t *ppos)
983 {
984 /* TODO: show lpm stats */
985 return 0;
986 }
987
988 static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf,
989 size_t count, loff_t *ppos)
990 {
991 struct usb_hcd *hcd;
992 struct ehci_hcd *ehci;
993 char buf[50];
994 size_t len;
995 u32 temp;
996 unsigned long port;
997 u32 __iomem *portsc ;
998 u32 params;
999
1000 hcd = bus_to_hcd(file->private_data);
1001 ehci = hcd_to_ehci(hcd);
1002
1003 len = min(count, sizeof(buf) - 1);
1004 if (copy_from_user(buf, user_buf, len))
1005 return -EFAULT;
1006 buf[len] = '\0';
1007 if (len > 0 && buf[len - 1] == '\n')
1008 buf[len - 1] = '\0';
1009
1010 if (strncmp(buf, "enable", 5) == 0) {
1011 if (strict_strtoul(buf + 7, 10, &port))
1012 return -EINVAL;
1013 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1014 if (port > HCS_N_PORTS(params)) {
1015 ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port);
1016 return -ENODEV;
1017 }
1018 portsc = &ehci->regs->port_status[port-1];
1019 temp = ehci_readl(ehci, portsc);
1020 if (!(temp & PORT_DEV_ADDR)) {
1021 ehci_dbg(ehci, "LPM: no device attached\n");
1022 return -ENODEV;
1023 }
1024 temp |= PORT_LPM;
1025 ehci_writel(ehci, temp, portsc);
1026 printk(KERN_INFO "force enable LPM for port %lu\n", port);
1027 } else if (strncmp(buf, "hird=", 5) == 0) {
1028 unsigned long hird;
1029 if (strict_strtoul(buf + 5, 16, &hird))
1030 return -EINVAL;
1031 printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird);
1032 ehci->command = (ehci->command & ~CMD_HIRD) | (hird << 24);
1033 ehci_writel(ehci, ehci->command, &ehci->regs->command);
1034 } else if (strncmp(buf, "disable", 7) == 0) {
1035 if (strict_strtoul(buf + 8, 10, &port))
1036 return -EINVAL;
1037 params = ehci_readl(ehci, &ehci->caps->hcs_params);
1038 if (port > HCS_N_PORTS(params)) {
1039 ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port);
1040 return -ENODEV;
1041 }
1042 portsc = &ehci->regs->port_status[port-1];
1043 temp = ehci_readl(ehci, portsc);
1044 if (!(temp & PORT_DEV_ADDR)) {
1045 ehci_dbg(ehci, "ERR: no device attached\n");
1046 return -ENODEV;
1047 }
1048 temp &= ~PORT_LPM;
1049 ehci_writel(ehci, temp, portsc);
1050 printk(KERN_INFO "disabled LPM for port %lu\n", port);
1051 } else
1052 return -EOPNOTSUPP;
1053 return count;
1054 }
1055
1056 static inline void create_debug_files (struct ehci_hcd *ehci)
1057 {
1058 struct usb_bus *bus = &ehci_to_hcd(ehci)->self;
1059
1060 ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root);
1061 if (!ehci->debug_dir)
1062 return;
1063
1064 if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus,
1065 &debug_async_fops))
1066 goto file_error;
1067
1068 if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus,
1069 &debug_periodic_fops))
1070 goto file_error;
1071
1072 if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus,
1073 &debug_registers_fops))
1074 goto file_error;
1075
1076 if (!debugfs_create_file("lpm", S_IRUGO|S_IWUSR, ehci->debug_dir, bus,
1077 &debug_lpm_fops))
1078 goto file_error;
1079
1080 return;
1081
1082 file_error:
1083 debugfs_remove_recursive(ehci->debug_dir);
1084 }
1085
1086 static inline void remove_debug_files (struct ehci_hcd *ehci)
1087 {
1088 debugfs_remove_recursive(ehci->debug_dir);
1089 }
1090
1091 #endif /* STUB_DEBUG_FILES */
Linux kernel - Deliverables
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