?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] PPC44x EMAC driver: disable TX status deferral in half-duplex mode
[linux-2.6.git] / drivers / usb / host / uhci-debug.c
blob5832953086f81987adb5b5566d51e51ce78b3015
1 /*
2 * UHCI-specific debugging code. Invaluable when something
3 * goes wrong, but don't get in my face.
4 *
5 * Kernel visible pointers are surrounded in []s and bus
6 * visible pointers are surrounded in ()s
7 *
8 * (C) Copyright 1999 Linus Torvalds
9 * (C) Copyright 1999-2001 Johannes Erdfelt
10 */
11
12 #include <linux/config.h>
13 #include <linux/kernel.h>
14 #include <linux/debugfs.h>
15 #include <linux/smp_lock.h>
16 #include <asm/io.h>
17
18 #include "uhci-hcd.h"
19
20 static struct dentry *uhci_debugfs_root = NULL;
21
22 /* Handle REALLY large printks so we don't overflow buffers */
23 static inline void lprintk(char *buf)
24 {
25 char *p;
26
27 /* Just write one line at a time */
28 while (buf) {
29 p = strchr(buf, '\n');
30 if (p)
31 *p = 0;
32 printk(KERN_DEBUG "%s\n", buf);
33 buf = p;
34 if (buf)
35 buf++;
36 }
37 }
38
39 static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
40 {
41 char *out = buf;
42 char *spid;
43 u32 status, token;
44
45 /* Try to make sure there's enough memory */
46 if (len < 160)
47 return 0;
48
49 status = td_status(td);
50 out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
51 out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
52 ((status >> 27) & 3),
53 (status & TD_CTRL_SPD) ? "SPD " : "",
54 (status & TD_CTRL_LS) ? "LS " : "",
55 (status & TD_CTRL_IOC) ? "IOC " : "",
56 (status & TD_CTRL_ACTIVE) ? "Active " : "",
57 (status & TD_CTRL_STALLED) ? "Stalled " : "",
58 (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
59 (status & TD_CTRL_BABBLE) ? "Babble " : "",
60 (status & TD_CTRL_NAK) ? "NAK " : "",
61 (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
62 (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
63 status & 0x7ff);
64
65 token = td_token(td);
66 switch (uhci_packetid(token)) {
67 case USB_PID_SETUP:
68 spid = "SETUP";
69 break;
70 case USB_PID_OUT:
71 spid = "OUT";
72 break;
73 case USB_PID_IN:
74 spid = "IN";
75 break;
76 default:
77 spid = "?";
78 break;
79 }
80
81 out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
82 token >> 21,
83 ((token >> 19) & 1),
84 (token >> 15) & 15,
85 (token >> 8) & 127,
86 (token & 0xff),
87 spid);
88 out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
89
90 return out - buf;
91 }
92
93 static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
94 {
95 char *out = buf;
96 struct urb_priv *urbp;
97 struct list_head *head, *tmp;
98 struct uhci_td *td;
99 int i = 0, checked = 0, prevactive = 0;
100 __le32 element = qh_element(qh);
101
102 /* Try to make sure there's enough memory */
103 if (len < 80 * 6)
104 return 0;
105
106 out += sprintf(out, "%*s[%p] link (%08x) element (%08x)\n", space, "",
107 qh, le32_to_cpu(qh->link), le32_to_cpu(element));
108
109 if (element & UHCI_PTR_QH)
110 out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
111
112 if (element & UHCI_PTR_DEPTH)
113 out += sprintf(out, "%*s Depth traverse\n", space, "");
114
115 if (element & cpu_to_le32(8))
116 out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
117
118 if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
119 out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
120
121 if (!qh->urbp) {
122 out += sprintf(out, "%*s urbp == NULL\n", space, "");
123 goto out;
124 }
125
126 urbp = qh->urbp;
127
128 head = &urbp->td_list;
129 tmp = head->next;
130
131 td = list_entry(tmp, struct uhci_td, list);
132
133 if (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
134 out += sprintf(out, "%*s Element != First TD\n", space, "");
135
136 while (tmp != head) {
137 struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
138
139 tmp = tmp->next;
140
141 out += sprintf(out, "%*s%d: ", space + 2, "", i++);
142 out += uhci_show_td(td, out, len - (out - buf), 0);
143
144 if (i > 10 && !checked && prevactive && tmp != head &&
145 debug <= 2) {
146 struct list_head *ntmp = tmp;
147 struct uhci_td *ntd = td;
148 int active = 1, ni = i;
149
150 checked = 1;
151
152 while (ntmp != head && ntmp->next != head && active) {
153 ntd = list_entry(ntmp, struct uhci_td, list);
154
155 ntmp = ntmp->next;
156
157 active = td_status(ntd) & TD_CTRL_ACTIVE;
158
159 ni++;
160 }
161
162 if (active && ni > i) {
163 out += sprintf(out, "%*s[skipped %d active TDs]\n", space, "", ni - i);
164 tmp = ntmp;
165 td = ntd;
166 i = ni;
167 }
168 }
169
170 prevactive = td_status(td) & TD_CTRL_ACTIVE;
171 }
172
173 if (list_empty(&urbp->queue_list) || urbp->queued)
174 goto out;
175
176 out += sprintf(out, "%*sQueued QHs:\n", -space, "--");
177
178 head = &urbp->queue_list;
179 tmp = head->next;
180
181 while (tmp != head) {
182 struct urb_priv *nurbp = list_entry(tmp, struct urb_priv,
183 queue_list);
184 tmp = tmp->next;
185
186 out += uhci_show_qh(nurbp->qh, out, len - (out - buf), space);
187 }
188
189 out:
190 return out - buf;
191 }
192
193 #define show_frame_num() \
194 if (!shown) { \
195 shown = 1; \
196 out += sprintf(out, "- Frame %d\n", i); \
197 }
198
199 #ifdef CONFIG_PROC_FS
200 static const char * const qh_names[] = {
201 "skel_int128_qh", "skel_int64_qh",
202 "skel_int32_qh", "skel_int16_qh",
203 "skel_int8_qh", "skel_int4_qh",
204 "skel_int2_qh", "skel_int1_qh",
205 "skel_ls_control_qh", "skel_fs_control_qh",
206 "skel_bulk_qh", "skel_term_qh"
207 };
208
209 #define show_qh_name() \
210 if (!shown) { \
211 shown = 1; \
212 out += sprintf(out, "- %s\n", qh_names[i]); \
213 }
214
215 static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
216 {
217 char *out = buf;
218
219 /* Try to make sure there's enough memory */
220 if (len < 160)
221 return 0;
222
223 out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
224 port,
225 status,
226 (status & USBPORTSC_SUSP) ? " Suspend" : "",
227 (status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
228 (status & USBPORTSC_OC) ? " OverCurrent" : "",
229 (status & USBPORTSC_PR) ? " Reset" : "",
230 (status & USBPORTSC_LSDA) ? " LowSpeed" : "",
231 (status & USBPORTSC_RD) ? " ResumeDetect" : "",
232 (status & USBPORTSC_PEC) ? " EnableChange" : "",
233 (status & USBPORTSC_PE) ? " Enabled" : "",
234 (status & USBPORTSC_CSC) ? " ConnectChange" : "",
235 (status & USBPORTSC_CCS) ? " Connected" : "");
236
237 return out - buf;
238 }
239
240 static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
241 {
242 char *out = buf;
243 char *rh_state;
244
245 /* Try to make sure there's enough memory */
246 if (len < 60)
247 return 0;
248
249 switch (uhci->rh_state) {
250 case UHCI_RH_RESET:
251 rh_state = "reset"; break;
252 case UHCI_RH_SUSPENDED:
253 rh_state = "suspended"; break;
254 case UHCI_RH_AUTO_STOPPED:
255 rh_state = "auto-stopped"; break;
256 case UHCI_RH_RESUMING:
257 rh_state = "resuming"; break;
258 case UHCI_RH_SUSPENDING:
259 rh_state = "suspending"; break;
260 case UHCI_RH_RUNNING:
261 rh_state = "running"; break;
262 case UHCI_RH_RUNNING_NODEVS:
263 rh_state = "running, no devs"; break;
264 default:
265 rh_state = "?"; break;
266 }
267 out += sprintf(out, "Root-hub state: %s\n", rh_state);
268 return out - buf;
269 }
270
271 static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
272 {
273 char *out = buf;
274 unsigned long io_addr = uhci->io_addr;
275 unsigned short usbcmd, usbstat, usbint, usbfrnum;
276 unsigned int flbaseadd;
277 unsigned char sof;
278 unsigned short portsc1, portsc2;
279
280 /* Try to make sure there's enough memory */
281 if (len < 80 * 6)
282 return 0;
283
284 usbcmd = inw(io_addr + 0);
285 usbstat = inw(io_addr + 2);
286 usbint = inw(io_addr + 4);
287 usbfrnum = inw(io_addr + 6);
288 flbaseadd = inl(io_addr + 8);
289 sof = inb(io_addr + 12);
290 portsc1 = inw(io_addr + 16);
291 portsc2 = inw(io_addr + 18);
292
293 out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
294 usbcmd,
295 (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
296 (usbcmd & USBCMD_CF) ? "CF " : "",
297 (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
298 (usbcmd & USBCMD_FGR) ? "FGR " : "",
299 (usbcmd & USBCMD_EGSM) ? "EGSM " : "",
300 (usbcmd & USBCMD_GRESET) ? "GRESET " : "",
301 (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
302 (usbcmd & USBCMD_RS) ? "RS " : "");
303
304 out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
305 usbstat,
306 (usbstat & USBSTS_HCH) ? "HCHalted " : "",
307 (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
308 (usbstat & USBSTS_HSE) ? "HostSystemError " : "",
309 (usbstat & USBSTS_RD) ? "ResumeDetect " : "",
310 (usbstat & USBSTS_ERROR) ? "USBError " : "",
311 (usbstat & USBSTS_USBINT) ? "USBINT " : "");
312
313 out += sprintf(out, " usbint = %04x\n", usbint);
314 out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
315 0xfff & (4*(unsigned int)usbfrnum));
316 out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
317 out += sprintf(out, " sof = %02x\n", sof);
318 out += uhci_show_sc(1, portsc1, out, len - (out - buf));
319 out += uhci_show_sc(2, portsc2, out, len - (out - buf));
320
321 return out - buf;
322 }
323
324 static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp, char *buf, int len)
325 {
326 struct list_head *tmp;
327 char *out = buf;
328 int count = 0;
329
330 if (len < 200)
331 return 0;
332
333 out += sprintf(out, "urb_priv [%p] ", urbp);
334 out += sprintf(out, "urb [%p] ", urbp->urb);
335 out += sprintf(out, "qh [%p] ", urbp->qh);
336 out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
337 out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe), (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
338
339 switch (usb_pipetype(urbp->urb->pipe)) {
340 case PIPE_ISOCHRONOUS: out += sprintf(out, "ISO "); break;
341 case PIPE_INTERRUPT: out += sprintf(out, "INT "); break;
342 case PIPE_BULK: out += sprintf(out, "BLK "); break;
343 case PIPE_CONTROL: out += sprintf(out, "CTL "); break;
344 }
345
346 out += sprintf(out, "%s", (urbp->fsbr ? "FSBR " : ""));
347 out += sprintf(out, "%s", (urbp->fsbr_timeout ? "FSBR_TO " : ""));
348
349 if (urbp->urb->status != -EINPROGRESS)
350 out += sprintf(out, "Status=%d ", urbp->urb->status);
351 //out += sprintf(out, "FSBRtime=%lx ",urbp->fsbrtime);
352
353 count = 0;
354 list_for_each(tmp, &urbp->td_list)
355 count++;
356 out += sprintf(out, "TDs=%d ",count);
357
358 if (urbp->queued)
359 out += sprintf(out, "queued\n");
360 else {
361 count = 0;
362 list_for_each(tmp, &urbp->queue_list)
363 count++;
364 out += sprintf(out, "queued URBs=%d\n", count);
365 }
366
367 return out - buf;
368 }
369
370 static int uhci_show_lists(struct uhci_hcd *uhci, char *buf, int len)
371 {
372 char *out = buf;
373 struct list_head *head, *tmp;
374 int count;
375
376 out += sprintf(out, "Main list URBs:");
377 if (list_empty(&uhci->urb_list))
378 out += sprintf(out, " Empty\n");
379 else {
380 out += sprintf(out, "\n");
381 count = 0;
382 head = &uhci->urb_list;
383 tmp = head->next;
384 while (tmp != head) {
385 struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
386
387 out += sprintf(out, " %d: ", ++count);
388 out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
389 tmp = tmp->next;
390 }
391 }
392
393 out += sprintf(out, "Remove list URBs:");
394 if (list_empty(&uhci->urb_remove_list))
395 out += sprintf(out, " Empty\n");
396 else {
397 out += sprintf(out, "\n");
398 count = 0;
399 head = &uhci->urb_remove_list;
400 tmp = head->next;
401 while (tmp != head) {
402 struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
403
404 out += sprintf(out, " %d: ", ++count);
405 out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
406 tmp = tmp->next;
407 }
408 }
409
410 out += sprintf(out, "Complete list URBs:");
411 if (list_empty(&uhci->complete_list))
412 out += sprintf(out, " Empty\n");
413 else {
414 out += sprintf(out, "\n");
415 count = 0;
416 head = &uhci->complete_list;
417 tmp = head->next;
418 while (tmp != head) {
419 struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
420
421 out += sprintf(out, " %d: ", ++count);
422 out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
423 tmp = tmp->next;
424 }
425 }
426
427 return out - buf;
428 }
429
430 static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
431 {
432 unsigned long flags;
433 char *out = buf;
434 int i, j;
435 struct uhci_qh *qh;
436 struct uhci_td *td;
437 struct list_head *tmp, *head;
438
439 spin_lock_irqsave(&uhci->lock, flags);
440
441 out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
442 out += sprintf(out, "HC status\n");
443 out += uhci_show_status(uhci, out, len - (out - buf));
444
445 out += sprintf(out, "Frame List\n");
446 for (i = 0; i < UHCI_NUMFRAMES; ++i) {
447 int shown = 0;
448 td = uhci->frame_cpu[i];
449 if (!td)
450 continue;
451
452 if (td->dma_handle != (dma_addr_t)uhci->frame[i]) {
453 show_frame_num();
454 out += sprintf(out, " frame list does not match td->dma_handle!\n");
455 }
456 show_frame_num();
457
458 head = &td->fl_list;
459 tmp = head;
460 do {
461 td = list_entry(tmp, struct uhci_td, fl_list);
462 tmp = tmp->next;
463 out += uhci_show_td(td, out, len - (out - buf), 4);
464 } while (tmp != head);
465 }
466
467 out += sprintf(out, "Skeleton QHs\n");
468
469 for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
470 int shown = 0;
471
472 qh = uhci->skelqh[i];
473
474 if (debug > 1) {
475 show_qh_name();
476 out += uhci_show_qh(qh, out, len - (out - buf), 4);
477 }
478
479 /* Last QH is the Terminating QH, it's different */
480 if (i == UHCI_NUM_SKELQH - 1) {
481 if (qh->link != UHCI_PTR_TERM)
482 out += sprintf(out, " bandwidth reclamation on!\n");
483
484 if (qh_element(qh) != cpu_to_le32(uhci->term_td->dma_handle))
485 out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
486
487 continue;
488 }
489
490 j = (i < 7) ? 7 : i+1; /* Next skeleton */
491 if (list_empty(&qh->list)) {
492 if (i < UHCI_NUM_SKELQH - 1) {
493 if (qh->link !=
494 (cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH)) {
495 show_qh_name();
496 out += sprintf(out, " skeleton QH not linked to next skeleton QH!\n");
497 }
498 }
499
500 continue;
501 }
502
503 show_qh_name();
504
505 head = &qh->list;
506 tmp = head->next;
507
508 while (tmp != head) {
509 qh = list_entry(tmp, struct uhci_qh, list);
510
511 tmp = tmp->next;
512
513 out += uhci_show_qh(qh, out, len - (out - buf), 4);
514 }
515
516 if (i < UHCI_NUM_SKELQH - 1) {
517 if (qh->link !=
518 (cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH))
519 out += sprintf(out, " last QH not linked to next skeleton!\n");
520 }
521 }
522
523 if (debug > 2)
524 out += uhci_show_lists(uhci, out, len - (out - buf));
525
526 spin_unlock_irqrestore(&uhci->lock, flags);
527
528 return out - buf;
529 }
530
531 #define MAX_OUTPUT (64 * 1024)
532
533 struct uhci_debug {
534 int size;
535 char *data;
536 struct uhci_hcd *uhci;
537 };
538
539 static int uhci_debug_open(struct inode *inode, struct file *file)
540 {
541 struct uhci_hcd *uhci = inode->u.generic_ip;
542 struct uhci_debug *up;
543 int ret = -ENOMEM;
544
545 lock_kernel();
546 up = kmalloc(sizeof(*up), GFP_KERNEL);
547 if (!up)
548 goto out;
549
550 up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
551 if (!up->data) {
552 kfree(up);
553 goto out;
554 }
555
556 up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
557
558 file->private_data = up;
559
560 ret = 0;
561 out:
562 unlock_kernel();
563 return ret;
564 }
565
566 static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
567 {
568 struct uhci_debug *up;
569 loff_t new = -1;
570
571 lock_kernel();
572 up = file->private_data;
573
574 switch (whence) {
575 case 0:
576 new = off;
577 break;
578 case 1:
579 new = file->f_pos + off;
580 break;
581 }
582 if (new < 0 || new > up->size) {
583 unlock_kernel();
584 return -EINVAL;
585 }
586 unlock_kernel();
587 return (file->f_pos = new);
588 }
589
590 static ssize_t uhci_debug_read(struct file *file, char __user *buf,
591 size_t nbytes, loff_t *ppos)
592 {
593 struct uhci_debug *up = file->private_data;
594 return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
595 }
596
597 static int uhci_debug_release(struct inode *inode, struct file *file)
598 {
599 struct uhci_debug *up = file->private_data;
600
601 kfree(up->data);
602 kfree(up);
603
604 return 0;
605 }
606
607 static struct file_operations uhci_debug_operations = {
608 .open = uhci_debug_open,
609 .llseek = uhci_debug_lseek,
610 .read = uhci_debug_read,
611 .release = uhci_debug_release,
612 };
613
614 #else /* CONFIG_DEBUG_FS */
615
616 #define uhci_debug_operations (* (struct file_operations *) NULL)
617
618 #endif
Linus' kernel tree