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Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / usb / host / uhci-debug.c
blob98cf0b26b9684b2da11b7aa2c0628196479cc2a1
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/slab.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 #define uhci_debug_operations (* (const struct file_operations *) NULL)
21 static struct dentry *uhci_debugfs_root;
22
23 #ifdef DEBUG
24
25 /* Handle REALLY large printks so we don't overflow buffers */
26 static void lprintk(char *buf)
27 {
28 char *p;
29
30 /* Just write one line at a time */
31 while (buf) {
32 p = strchr(buf, '\n');
33 if (p)
34 *p = 0;
35 printk(KERN_DEBUG "%s\n", buf);
36 buf = p;
37 if (buf)
38 buf++;
39 }
40 }
41
42 static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
43 {
44 char *out = buf;
45 char *spid;
46 u32 status, token;
47
48 /* Try to make sure there's enough memory */
49 if (len < 160)
50 return 0;
51
52 status = td_status(td);
53 out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
54 out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
55 ((status >> 27) & 3),
56 (status & TD_CTRL_SPD) ? "SPD " : "",
57 (status & TD_CTRL_LS) ? "LS " : "",
58 (status & TD_CTRL_IOC) ? "IOC " : "",
59 (status & TD_CTRL_ACTIVE) ? "Active " : "",
60 (status & TD_CTRL_STALLED) ? "Stalled " : "",
61 (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
62 (status & TD_CTRL_BABBLE) ? "Babble " : "",
63 (status & TD_CTRL_NAK) ? "NAK " : "",
64 (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
65 (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
66 status & 0x7ff);
67
68 token = td_token(td);
69 switch (uhci_packetid(token)) {
70 case USB_PID_SETUP:
71 spid = "SETUP";
72 break;
73 case USB_PID_OUT:
74 spid = "OUT";
75 break;
76 case USB_PID_IN:
77 spid = "IN";
78 break;
79 default:
80 spid = "?";
81 break;
82 }
83
84 out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
85 token >> 21,
86 ((token >> 19) & 1),
87 (token >> 15) & 15,
88 (token >> 8) & 127,
89 (token & 0xff),
90 spid);
91 out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
92
93 return out - buf;
94 }
95
96 static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
97 {
98 char *out = buf;
99 struct uhci_td *td;
100 int i, nactive, ninactive;
101 char *ptype;
102
103 if (len < 200)
104 return 0;
105
106 out += sprintf(out, "urb_priv [%p] ", urbp);
107 out += sprintf(out, "urb [%p] ", urbp->urb);
108 out += sprintf(out, "qh [%p] ", urbp->qh);
109 out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
110 out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
111 (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
112
113 switch (usb_pipetype(urbp->urb->pipe)) {
114 case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
115 case PIPE_INTERRUPT: ptype = "INT"; break;
116 case PIPE_BULK: ptype = "BLK"; break;
117 default:
118 case PIPE_CONTROL: ptype = "CTL"; break;
119 }
120
121 out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
122 out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
123 (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
124 "-8" : ""));
125
126 if (urbp->urb->unlinked)
127 out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
128 out += sprintf(out, "\n");
129
130 i = nactive = ninactive = 0;
131 list_for_each_entry(td, &urbp->td_list, list) {
132 if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
133 (++i <= 10 || debug > 2)) {
134 out += sprintf(out, "%*s%d: ", space + 2, "", i);
135 out += uhci_show_td(td, out, len - (out - buf), 0);
136 } else {
137 if (td_status(td) & TD_CTRL_ACTIVE)
138 ++nactive;
139 else
140 ++ninactive;
141 }
142 }
143 if (nactive + ninactive > 0)
144 out += sprintf(out, "%*s[skipped %d inactive and %d active "
145 "TDs]\n",
146 space, "", ninactive, nactive);
147
148 return out - buf;
149 }
150
151 static int uhci_show_qh(struct uhci_hcd *uhci,
152 struct uhci_qh *qh, char *buf, int len, int space)
153 {
154 char *out = buf;
155 int i, nurbs;
156 __le32 element = qh_element(qh);
157 char *qtype;
158
159 /* Try to make sure there's enough memory */
160 if (len < 80 * 7)
161 return 0;
162
163 switch (qh->type) {
164 case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
165 case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
166 case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
167 case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
168 default: qtype = "Skel" ; break;
169 }
170
171 out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
172 space, "", qh, qtype,
173 le32_to_cpu(qh->link), le32_to_cpu(element));
174 if (qh->type == USB_ENDPOINT_XFER_ISOC)
175 out += sprintf(out, "%*s period %d phase %d load %d us, "
176 "frame %x desc [%p]\n",
177 space, "", qh->period, qh->phase, qh->load,
178 qh->iso_frame, qh->iso_packet_desc);
179 else if (qh->type == USB_ENDPOINT_XFER_INT)
180 out += sprintf(out, "%*s period %d phase %d load %d us\n",
181 space, "", qh->period, qh->phase, qh->load);
182
183 if (element & UHCI_PTR_QH)
184 out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
185
186 if (element & UHCI_PTR_DEPTH)
187 out += sprintf(out, "%*s Depth traverse\n", space, "");
188
189 if (element & cpu_to_le32(8))
190 out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
191
192 if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
193 out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
194
195 if (list_empty(&qh->queue)) {
196 out += sprintf(out, "%*s queue is empty\n", space, "");
197 if (qh == uhci->skel_async_qh)
198 out += uhci_show_td(uhci->term_td, out,
199 len - (out - buf), 0);
200 } else {
201 struct urb_priv *urbp = list_entry(qh->queue.next,
202 struct urb_priv, node);
203 struct uhci_td *td = list_entry(urbp->td_list.next,
204 struct uhci_td, list);
205
206 if (element != LINK_TO_TD(td))
207 out += sprintf(out, "%*s Element != First TD\n",
208 space, "");
209 i = nurbs = 0;
210 list_for_each_entry(urbp, &qh->queue, node) {
211 if (++i <= 10)
212 out += uhci_show_urbp(urbp, out,
213 len - (out - buf), space + 2);
214 else
215 ++nurbs;
216 }
217 if (nurbs > 0)
218 out += sprintf(out, "%*s Skipped %d URBs\n",
219 space, "", nurbs);
220 }
221
222 if (qh->dummy_td) {
223 out += sprintf(out, "%*s Dummy TD\n", space, "");
224 out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
225 }
226
227 return out - buf;
228 }
229
230 static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
231 {
232 char *out = buf;
233
234 /* Try to make sure there's enough memory */
235 if (len < 160)
236 return 0;
237
238 out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
239 port,
240 status,
241 (status & USBPORTSC_SUSP) ? " Suspend" : "",
242 (status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
243 (status & USBPORTSC_OC) ? " OverCurrent" : "",
244 (status & USBPORTSC_PR) ? " Reset" : "",
245 (status & USBPORTSC_LSDA) ? " LowSpeed" : "",
246 (status & USBPORTSC_RD) ? " ResumeDetect" : "",
247 (status & USBPORTSC_PEC) ? " EnableChange" : "",
248 (status & USBPORTSC_PE) ? " Enabled" : "",
249 (status & USBPORTSC_CSC) ? " ConnectChange" : "",
250 (status & USBPORTSC_CCS) ? " Connected" : "");
251
252 return out - buf;
253 }
254
255 static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
256 {
257 char *out = buf;
258 char *rh_state;
259
260 /* Try to make sure there's enough memory */
261 if (len < 60)
262 return 0;
263
264 switch (uhci->rh_state) {
265 case UHCI_RH_RESET:
266 rh_state = "reset"; break;
267 case UHCI_RH_SUSPENDED:
268 rh_state = "suspended"; break;
269 case UHCI_RH_AUTO_STOPPED:
270 rh_state = "auto-stopped"; break;
271 case UHCI_RH_RESUMING:
272 rh_state = "resuming"; break;
273 case UHCI_RH_SUSPENDING:
274 rh_state = "suspending"; break;
275 case UHCI_RH_RUNNING:
276 rh_state = "running"; break;
277 case UHCI_RH_RUNNING_NODEVS:
278 rh_state = "running, no devs"; break;
279 default:
280 rh_state = "?"; break;
281 }
282 out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
283 rh_state, uhci->fsbr_is_on);
284 return out - buf;
285 }
286
287 static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
288 {
289 char *out = buf;
290 unsigned long io_addr = uhci->io_addr;
291 unsigned short usbcmd, usbstat, usbint, usbfrnum;
292 unsigned int flbaseadd;
293 unsigned char sof;
294 unsigned short portsc1, portsc2;
295
296 /* Try to make sure there's enough memory */
297 if (len < 80 * 9)
298 return 0;
299
300 usbcmd = inw(io_addr + 0);
301 usbstat = inw(io_addr + 2);
302 usbint = inw(io_addr + 4);
303 usbfrnum = inw(io_addr + 6);
304 flbaseadd = inl(io_addr + 8);
305 sof = inb(io_addr + 12);
306 portsc1 = inw(io_addr + 16);
307 portsc2 = inw(io_addr + 18);
308
309 out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
310 usbcmd,
311 (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
312 (usbcmd & USBCMD_CF) ? "CF " : "",
313 (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
314 (usbcmd & USBCMD_FGR) ? "FGR " : "",
315 (usbcmd & USBCMD_EGSM) ? "EGSM " : "",
316 (usbcmd & USBCMD_GRESET) ? "GRESET " : "",
317 (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
318 (usbcmd & USBCMD_RS) ? "RS " : "");
319
320 out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
321 usbstat,
322 (usbstat & USBSTS_HCH) ? "HCHalted " : "",
323 (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
324 (usbstat & USBSTS_HSE) ? "HostSystemError " : "",
325 (usbstat & USBSTS_RD) ? "ResumeDetect " : "",
326 (usbstat & USBSTS_ERROR) ? "USBError " : "",
327 (usbstat & USBSTS_USBINT) ? "USBINT " : "");
328
329 out += sprintf(out, " usbint = %04x\n", usbint);
330 out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
331 0xfff & (4*(unsigned int)usbfrnum));
332 out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
333 out += sprintf(out, " sof = %02x\n", sof);
334 out += uhci_show_sc(1, portsc1, out, len - (out - buf));
335 out += uhci_show_sc(2, portsc2, out, len - (out - buf));
336 out += sprintf(out, "Most recent frame: %x (%d) "
337 "Last ISO frame: %x (%d)\n",
338 uhci->frame_number, uhci->frame_number & 1023,
339 uhci->last_iso_frame, uhci->last_iso_frame & 1023);
340
341 return out - buf;
342 }
343
344 static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
345 {
346 char *out = buf;
347 int i, j;
348 struct uhci_qh *qh;
349 struct uhci_td *td;
350 struct list_head *tmp, *head;
351 int nframes, nerrs;
352 __le32 link;
353 __le32 fsbr_link;
354
355 static const char * const qh_names[] = {
356 "unlink", "iso", "int128", "int64", "int32", "int16",
357 "int8", "int4", "int2", "async", "term"
358 };
359
360 out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
361 out += sprintf(out, "HC status\n");
362 out += uhci_show_status(uhci, out, len - (out - buf));
363
364 out += sprintf(out, "Periodic load table\n");
365 for (i = 0; i < MAX_PHASE; ++i) {
366 out += sprintf(out, "\t%d", uhci->load[i]);
367 if (i % 8 == 7)
368 *out++ = '\n';
369 }
370 out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
371 uhci->total_load,
372 uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
373 uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
374 if (debug <= 1)
375 return out - buf;
376
377 out += sprintf(out, "Frame List\n");
378 nframes = 10;
379 nerrs = 0;
380 for (i = 0; i < UHCI_NUMFRAMES; ++i) {
381 __le32 qh_dma;
382
383 j = 0;
384 td = uhci->frame_cpu[i];
385 link = uhci->frame[i];
386 if (!td)
387 goto check_link;
388
389 if (nframes > 0) {
390 out += sprintf(out, "- Frame %d -> (%08x)\n",
391 i, le32_to_cpu(link));
392 j = 1;
393 }
394
395 head = &td->fl_list;
396 tmp = head;
397 do {
398 td = list_entry(tmp, struct uhci_td, fl_list);
399 tmp = tmp->next;
400 if (link != LINK_TO_TD(td)) {
401 if (nframes > 0)
402 out += sprintf(out, " link does "
403 "not match list entry!\n");
404 else
405 ++nerrs;
406 }
407 if (nframes > 0)
408 out += uhci_show_td(td, out,
409 len - (out - buf), 4);
410 link = td->link;
411 } while (tmp != head);
412
413 check_link:
414 qh_dma = uhci_frame_skel_link(uhci, i);
415 if (link != qh_dma) {
416 if (nframes > 0) {
417 if (!j) {
418 out += sprintf(out,
419 "- Frame %d -> (%08x)\n",
420 i, le32_to_cpu(link));
421 j = 1;
422 }
423 out += sprintf(out, " link does not match "
424 "QH (%08x)!\n", le32_to_cpu(qh_dma));
425 } else
426 ++nerrs;
427 }
428 nframes -= j;
429 }
430 if (nerrs > 0)
431 out += sprintf(out, "Skipped %d bad links\n", nerrs);
432
433 out += sprintf(out, "Skeleton QHs\n");
434
435 fsbr_link = 0;
436 for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
437 int cnt = 0;
438
439 qh = uhci->skelqh[i];
440 out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
441 out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
442
443 /* Last QH is the Terminating QH, it's different */
444 if (i == SKEL_TERM) {
445 if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
446 out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
447 link = fsbr_link;
448 if (!link)
449 link = LINK_TO_QH(uhci->skel_term_qh);
450 goto check_qh_link;
451 }
452
453 head = &qh->node;
454 tmp = head->next;
455
456 while (tmp != head) {
457 qh = list_entry(tmp, struct uhci_qh, node);
458 tmp = tmp->next;
459 if (++cnt <= 10)
460 out += uhci_show_qh(uhci, qh, out,
461 len - (out - buf), 4);
462 if (!fsbr_link && qh->skel >= SKEL_FSBR)
463 fsbr_link = LINK_TO_QH(qh);
464 }
465 if ((cnt -= 10) > 0)
466 out += sprintf(out, " Skipped %d QHs\n", cnt);
467
468 link = UHCI_PTR_TERM;
469 if (i <= SKEL_ISO)
470 ;
471 else if (i < SKEL_ASYNC)
472 link = LINK_TO_QH(uhci->skel_async_qh);
473 else if (!uhci->fsbr_is_on)
474 ;
475 else
476 link = LINK_TO_QH(uhci->skel_term_qh);
477 check_qh_link:
478 if (qh->link != link)
479 out += sprintf(out, " last QH not linked to next skeleton!\n");
480 }
481
482 return out - buf;
483 }
484
485 #ifdef CONFIG_DEBUG_FS
486
487 #define MAX_OUTPUT (64 * 1024)
488
489 struct uhci_debug {
490 int size;
491 char *data;
492 };
493
494 static int uhci_debug_open(struct inode *inode, struct file *file)
495 {
496 struct uhci_hcd *uhci = inode->i_private;
497 struct uhci_debug *up;
498 int ret = -ENOMEM;
499 unsigned long flags;
500
501 lock_kernel();
502 up = kmalloc(sizeof(*up), GFP_KERNEL);
503 if (!up)
504 goto out;
505
506 up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
507 if (!up->data) {
508 kfree(up);
509 goto out;
510 }
511
512 up->size = 0;
513 spin_lock_irqsave(&uhci->lock, flags);
514 if (uhci->is_initialized)
515 up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
516 spin_unlock_irqrestore(&uhci->lock, flags);
517
518 file->private_data = up;
519
520 ret = 0;
521 out:
522 unlock_kernel();
523 return ret;
524 }
525
526 static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
527 {
528 struct uhci_debug *up;
529 loff_t new = -1;
530
531 lock_kernel();
532 up = file->private_data;
533
534 switch (whence) {
535 case 0:
536 new = off;
537 break;
538 case 1:
539 new = file->f_pos + off;
540 break;
541 }
542 if (new < 0 || new > up->size) {
543 unlock_kernel();
544 return -EINVAL;
545 }
546 unlock_kernel();
547 return (file->f_pos = new);
548 }
549
550 static ssize_t uhci_debug_read(struct file *file, char __user *buf,
551 size_t nbytes, loff_t *ppos)
552 {
553 struct uhci_debug *up = file->private_data;
554 return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
555 }
556
557 static int uhci_debug_release(struct inode *inode, struct file *file)
558 {
559 struct uhci_debug *up = file->private_data;
560
561 kfree(up->data);
562 kfree(up);
563
564 return 0;
565 }
566
567 #undef uhci_debug_operations
568 static const struct file_operations uhci_debug_operations = {
569 .owner = THIS_MODULE,
570 .open = uhci_debug_open,
571 .llseek = uhci_debug_lseek,
572 .read = uhci_debug_read,
573 .release = uhci_debug_release,
574 };
575
576 #endif /* CONFIG_DEBUG_FS */
577
578 #else /* DEBUG */
579
580 static inline void lprintk(char *buf)
581 {}
582
583 static inline int uhci_show_qh(struct uhci_hcd *uhci,
584 struct uhci_qh *qh, char *buf, int len, int space)
585 {
586 return 0;
587 }
588
589 static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
590 char *buf, int len)
591 {
592 return 0;
593 }
594
595 #endif
Linux with added FPC-III support