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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * UHCI-specific debugging code. Invaluable when something
4 * goes wrong, but don't get in my face.
5 *
6 * Kernel visible pointers are surrounded in []s and bus
7 * visible pointers are surrounded in ()s
8 *
9 * (C) Copyright 1999 Linus Torvalds
10 * (C) Copyright 1999-2001 Johannes Erdfelt
11 */
12
13#include <linux/slab.h>
14#include <linux/kernel.h>
15#include <linux/debugfs.h>
16#include <asm/io.h>
17
18#include "uhci-hcd.h"
19
20#define EXTRA_SPACE 1024
21
22static struct dentry *uhci_debugfs_root;
23
24#ifdef CONFIG_DYNAMIC_DEBUG
25
26/* Handle REALLY large printks so we don't overflow buffers */
27static void lprintk(char *buf)
28{
29 char *p;
30
31 /* Just write one line at a time */
32 while (buf) {
33 p = strchr(buf, '\n');
34 if (p)
35 *p = 0;
36 printk(KERN_DEBUG "%s\n", buf);
37 buf = p;
38 if (buf)
39 buf++;
40 }
41}
42
43static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
44 int len, int space)
45{
46 char *out = buf;
47 char *spid;
48 u32 status, token;
49
50 status = td_status(uhci, td);
51 out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
52 hc32_to_cpu(uhci, td->link));
53 out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
54 ((status >> 27) & 3),
55 (status & TD_CTRL_SPD) ? "SPD " : "",
56 (status & TD_CTRL_LS) ? "LS " : "",
57 (status & TD_CTRL_IOC) ? "IOC " : "",
58 (status & TD_CTRL_ACTIVE) ? "Active " : "",
59 (status & TD_CTRL_STALLED) ? "Stalled " : "",
60 (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
61 (status & TD_CTRL_BABBLE) ? "Babble " : "",
62 (status & TD_CTRL_NAK) ? "NAK " : "",
63 (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
64 (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
65 status & 0x7ff);
66 if (out - buf > len)
67 goto done;
68
69 token = td_token(uhci, td);
70 switch (uhci_packetid(token)) {
71 case USB_PID_SETUP:
72 spid = "SETUP";
73 break;
74 case USB_PID_OUT:
75 spid = "OUT";
76 break;
77 case USB_PID_IN:
78 spid = "IN";
79 break;
80 default:
81 spid = "?";
82 break;
83 }
84
85 out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
86 token >> 21,
87 ((token >> 19) & 1),
88 (token >> 15) & 15,
89 (token >> 8) & 127,
90 (token & 0xff),
91 spid);
92 out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));
93
94done:
95 if (out - buf > len)
96 out += sprintf(out, " ...\n");
97 return out - buf;
98}
99
100static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
101 char *buf, int len, int space)
102{
103 char *out = buf;
104 struct uhci_td *td;
105 int i, nactive, ninactive;
106 char *ptype;
107
108
109 out += sprintf(out, "urb_priv [%p] ", urbp);
110 out += sprintf(out, "urb [%p] ", urbp->urb);
111 out += sprintf(out, "qh [%p] ", urbp->qh);
112 out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
113 out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
114 (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
115 if (out - buf > len)
116 goto done;
117
118 switch (usb_pipetype(urbp->urb->pipe)) {
119 case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
120 case PIPE_INTERRUPT: ptype = "INT"; break;
121 case PIPE_BULK: ptype = "BLK"; break;
122 default:
123 case PIPE_CONTROL: ptype = "CTL"; break;
124 }
125
126 out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
127 out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
128 (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
129 "-8" : ""));
130
131 if (urbp->urb->unlinked)
132 out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
133 out += sprintf(out, "\n");
134
135 if (out - buf > len)
136 goto done;
137
138 i = nactive = ninactive = 0;
139 list_for_each_entry(td, &urbp->td_list, list) {
140 if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
141 (++i <= 10 || debug > 2)) {
142 out += sprintf(out, "%*s%d: ", space + 2, "", i);
143 out += uhci_show_td(uhci, td, out,
144 len - (out - buf), 0);
145 if (out - buf > len)
146 goto tail;
147 } else {
148 if (td_status(uhci, td) & TD_CTRL_ACTIVE)
149 ++nactive;
150 else
151 ++ninactive;
152 }
153 }
154 if (nactive + ninactive > 0)
155 out += sprintf(out,
156 "%*s[skipped %d inactive and %d active TDs]\n",
157 space, "", ninactive, nactive);
158done:
159 if (out - buf > len)
160 out += sprintf(out, " ...\n");
161tail:
162 return out - buf;
163}
164
165static int uhci_show_qh(struct uhci_hcd *uhci,
166 struct uhci_qh *qh, char *buf, int len, int space)
167{
168 char *out = buf;
169 int i, nurbs;
170 __hc32 element = qh_element(qh);
171 char *qtype;
172
173 switch (qh->type) {
174 case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
175 case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
176 case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
177 case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
178 default: qtype = "Skel" ; break;
179 }
180
181 out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
182 space, "", qh, qtype,
183 hc32_to_cpu(uhci, qh->link),
184 hc32_to_cpu(uhci, element));
185 if (qh->type == USB_ENDPOINT_XFER_ISOC)
186 out += sprintf(out,
187 "%*s period %d phase %d load %d us, frame %x desc [%p]\n",
188 space, "", qh->period, qh->phase, qh->load,
189 qh->iso_frame, qh->iso_packet_desc);
190 else if (qh->type == USB_ENDPOINT_XFER_INT)
191 out += sprintf(out, "%*s period %d phase %d load %d us\n",
192 space, "", qh->period, qh->phase, qh->load);
193 if (out - buf > len)
194 goto done;
195
196 if (element & UHCI_PTR_QH(uhci))
197 out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
198
199 if (element & UHCI_PTR_DEPTH(uhci))
200 out += sprintf(out, "%*s Depth traverse\n", space, "");
201
202 if (element & cpu_to_hc32(uhci, 8))
203 out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
204
205 if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci))))
206 out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
207
208 if (out - buf > len)
209 goto done;
210
211 if (list_empty(&qh->queue)) {
212 out += sprintf(out, "%*s queue is empty\n", space, "");
213 if (qh == uhci->skel_async_qh) {
214 out += uhci_show_td(uhci, uhci->term_td, out,
215 len - (out - buf), 0);
216 if (out - buf > len)
217 goto tail;
218 }
219 } else {
220 struct urb_priv *urbp = list_entry(qh->queue.next,
221 struct urb_priv, node);
222 struct uhci_td *td = list_entry(urbp->td_list.next,
223 struct uhci_td, list);
224
225 if (element != LINK_TO_TD(uhci, td))
226 out += sprintf(out, "%*s Element != First TD\n",
227 space, "");
228 i = nurbs = 0;
229 list_for_each_entry(urbp, &qh->queue, node) {
230 if (++i <= 10) {
231 out += uhci_show_urbp(uhci, urbp, out,
232 len - (out - buf), space + 2);
233 if (out - buf > len)
234 goto tail;
235 }
236 else
237 ++nurbs;
238 }
239 if (nurbs > 0)
240 out += sprintf(out, "%*s Skipped %d URBs\n",
241 space, "", nurbs);
242 }
243
244 if (out - buf > len)
245 goto done;
246
247 if (qh->dummy_td) {
248 out += sprintf(out, "%*s Dummy TD\n", space, "");
249 out += uhci_show_td(uhci, qh->dummy_td, out,
250 len - (out - buf), 0);
251 if (out - buf > len)
252 goto tail;
253 }
254
255done:
256 if (out - buf > len)
257 out += sprintf(out, " ...\n");
258tail:
259 return out - buf;
260}
261
262static int uhci_show_sc(int port, unsigned short status, char *buf)
263{
264 return sprintf(buf, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
265 port,
266 status,
267 (status & USBPORTSC_SUSP) ? " Suspend" : "",
268 (status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
269 (status & USBPORTSC_OC) ? " OverCurrent" : "",
270 (status & USBPORTSC_PR) ? " Reset" : "",
271 (status & USBPORTSC_LSDA) ? " LowSpeed" : "",
272 (status & USBPORTSC_RD) ? " ResumeDetect" : "",
273 (status & USBPORTSC_PEC) ? " EnableChange" : "",
274 (status & USBPORTSC_PE) ? " Enabled" : "",
275 (status & USBPORTSC_CSC) ? " ConnectChange" : "",
276 (status & USBPORTSC_CCS) ? " Connected" : "");
277}
278
279static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf)
280{
281 char *rh_state;
282
283 switch (uhci->rh_state) {
284 case UHCI_RH_RESET:
285 rh_state = "reset"; break;
286 case UHCI_RH_SUSPENDED:
287 rh_state = "suspended"; break;
288 case UHCI_RH_AUTO_STOPPED:
289 rh_state = "auto-stopped"; break;
290 case UHCI_RH_RESUMING:
291 rh_state = "resuming"; break;
292 case UHCI_RH_SUSPENDING:
293 rh_state = "suspending"; break;
294 case UHCI_RH_RUNNING:
295 rh_state = "running"; break;
296 case UHCI_RH_RUNNING_NODEVS:
297 rh_state = "running, no devs"; break;
298 default:
299 rh_state = "?"; break;
300 }
301 return sprintf(buf, "Root-hub state: %s FSBR: %d\n",
302 rh_state, uhci->fsbr_is_on);
303}
304
305static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
306{
307 char *out = buf;
308 unsigned short usbcmd, usbstat, usbint, usbfrnum;
309 unsigned int flbaseadd;
310 unsigned char sof;
311 unsigned short portsc1, portsc2;
312
313
314 usbcmd = uhci_readw(uhci, USBCMD);
315 usbstat = uhci_readw(uhci, USBSTS);
316 usbint = uhci_readw(uhci, USBINTR);
317 usbfrnum = uhci_readw(uhci, USBFRNUM);
318 flbaseadd = uhci_readl(uhci, USBFLBASEADD);
319 sof = uhci_readb(uhci, USBSOF);
320 portsc1 = uhci_readw(uhci, USBPORTSC1);
321 portsc2 = uhci_readw(uhci, USBPORTSC2);
322
323 out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
324 usbcmd,
325 (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
326 (usbcmd & USBCMD_CF) ? "CF " : "",
327 (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
328 (usbcmd & USBCMD_FGR) ? "FGR " : "",
329 (usbcmd & USBCMD_EGSM) ? "EGSM " : "",
330 (usbcmd & USBCMD_GRESET) ? "GRESET " : "",
331 (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
332 (usbcmd & USBCMD_RS) ? "RS " : "");
333 if (out - buf > len)
334 goto done;
335
336 out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
337 usbstat,
338 (usbstat & USBSTS_HCH) ? "HCHalted " : "",
339 (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
340 (usbstat & USBSTS_HSE) ? "HostSystemError " : "",
341 (usbstat & USBSTS_RD) ? "ResumeDetect " : "",
342 (usbstat & USBSTS_ERROR) ? "USBError " : "",
343 (usbstat & USBSTS_USBINT) ? "USBINT " : "");
344 if (out - buf > len)
345 goto done;
346
347 out += sprintf(out, " usbint = %04x\n", usbint);
348 out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
349 0xfff & (4*(unsigned int)usbfrnum));
350 out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
351 out += sprintf(out, " sof = %02x\n", sof);
352 if (out - buf > len)
353 goto done;
354
355 out += uhci_show_sc(1, portsc1, out);
356 if (out - buf > len)
357 goto done;
358
359 out += uhci_show_sc(2, portsc2, out);
360 if (out - buf > len)
361 goto done;
362
363 out += sprintf(out,
364 "Most recent frame: %x (%d) Last ISO frame: %x (%d)\n",
365 uhci->frame_number, uhci->frame_number & 1023,
366 uhci->last_iso_frame, uhci->last_iso_frame & 1023);
367
368done:
369 if (out - buf > len)
370 out += sprintf(out, " ...\n");
371 return out - buf;
372}
373
374static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
375{
376 char *out = buf;
377 int i, j;
378 struct uhci_qh *qh;
379 struct uhci_td *td;
380 struct list_head *tmp, *head;
381 int nframes, nerrs;
382 __hc32 link;
383 __hc32 fsbr_link;
384
385 static const char * const qh_names[] = {
386 "unlink", "iso", "int128", "int64", "int32", "int16",
387 "int8", "int4", "int2", "async", "term"
388 };
389
390 out += uhci_show_root_hub_state(uhci, out);
391 if (out - buf > len)
392 goto done;
393 out += sprintf(out, "HC status\n");
394 out += uhci_show_status(uhci, out, len - (out - buf));
395 if (out - buf > len)
396 goto tail;
397
398 out += sprintf(out, "Periodic load table\n");
399 for (i = 0; i < MAX_PHASE; ++i) {
400 out += sprintf(out, "\t%d", uhci->load[i]);
401 if (i % 8 == 7)
402 *out++ = '\n';
403 }
404 out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
405 uhci->total_load,
406 uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
407 uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
408 if (debug <= 1)
409 goto tail;
410
411 out += sprintf(out, "Frame List\n");
412 nframes = 10;
413 nerrs = 0;
414 for (i = 0; i < UHCI_NUMFRAMES; ++i) {
415 __hc32 qh_dma;
416
417 if (out - buf > len)
418 goto done;
419 j = 0;
420 td = uhci->frame_cpu[i];
421 link = uhci->frame[i];
422 if (!td)
423 goto check_link;
424
425 if (nframes > 0) {
426 out += sprintf(out, "- Frame %d -> (%08x)\n",
427 i, hc32_to_cpu(uhci, link));
428 j = 1;
429 }
430
431 head = &td->fl_list;
432 tmp = head;
433 do {
434 td = list_entry(tmp, struct uhci_td, fl_list);
435 tmp = tmp->next;
436 if (link != LINK_TO_TD(uhci, td)) {
437 if (nframes > 0) {
438 out += sprintf(out,
439 " link does not match list entry!\n");
440 if (out - buf > len)
441 goto done;
442 } else
443 ++nerrs;
444 }
445 if (nframes > 0) {
446 out += uhci_show_td(uhci, td, out,
447 len - (out - buf), 4);
448 if (out - buf > len)
449 goto tail;
450 }
451 link = td->link;
452 } while (tmp != head);
453
454check_link:
455 qh_dma = uhci_frame_skel_link(uhci, i);
456 if (link != qh_dma) {
457 if (nframes > 0) {
458 if (!j) {
459 out += sprintf(out,
460 "- Frame %d -> (%08x)\n",
461 i, hc32_to_cpu(uhci, link));
462 j = 1;
463 }
464 out += sprintf(out,
465 " link does not match QH (%08x)!\n",
466 hc32_to_cpu(uhci, qh_dma));
467 if (out - buf > len)
468 goto done;
469 } else
470 ++nerrs;
471 }
472 nframes -= j;
473 }
474 if (nerrs > 0)
475 out += sprintf(out, "Skipped %d bad links\n", nerrs);
476
477 out += sprintf(out, "Skeleton QHs\n");
478
479 if (out - buf > len)
480 goto done;
481
482 fsbr_link = 0;
483 for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
484 int cnt = 0;
485
486 qh = uhci->skelqh[i];
487 out += sprintf(out, "- skel_%s_qh\n", qh_names[i]);
488 out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
489 if (out - buf > len)
490 goto tail;
491
492 /* Last QH is the Terminating QH, it's different */
493 if (i == SKEL_TERM) {
494 if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) {
495 out += sprintf(out,
496 " skel_term_qh element is not set to term_td!\n");
497 if (out - buf > len)
498 goto done;
499 }
500 link = fsbr_link;
501 if (!link)
502 link = LINK_TO_QH(uhci, uhci->skel_term_qh);
503 goto check_qh_link;
504 }
505
506 head = &qh->node;
507 tmp = head->next;
508
509 while (tmp != head) {
510 qh = list_entry(tmp, struct uhci_qh, node);
511 tmp = tmp->next;
512 if (++cnt <= 10) {
513 out += uhci_show_qh(uhci, qh, out,
514 len - (out - buf), 4);
515 if (out - buf > len)
516 goto tail;
517 }
518 if (!fsbr_link && qh->skel >= SKEL_FSBR)
519 fsbr_link = LINK_TO_QH(uhci, qh);
520 }
521 if ((cnt -= 10) > 0)
522 out += sprintf(out, " Skipped %d QHs\n", cnt);
523
524 link = UHCI_PTR_TERM(uhci);
525 if (i <= SKEL_ISO)
526 ;
527 else if (i < SKEL_ASYNC)
528 link = LINK_TO_QH(uhci, uhci->skel_async_qh);
529 else if (!uhci->fsbr_is_on)
530 ;
531 else
532 link = LINK_TO_QH(uhci, uhci->skel_term_qh);
533check_qh_link:
534 if (qh->link != link)
535 out += sprintf(out,
536 " last QH not linked to next skeleton!\n");
537
538 if (out - buf > len)
539 goto done;
540 }
541
542done:
543 if (out - buf > len)
544 out += sprintf(out, " ...\n");
545tail:
546 return out - buf;
547}
548
549#ifdef CONFIG_DEBUG_FS
550
551#define MAX_OUTPUT (64 * 1024)
552
553struct uhci_debug {
554 int size;
555 char *data;
556};
557
558static int uhci_debug_open(struct inode *inode, struct file *file)
559{
560 struct uhci_hcd *uhci = inode->i_private;
561 struct uhci_debug *up;
562 unsigned long flags;
563
564 up = kmalloc(sizeof(*up), GFP_KERNEL);
565 if (!up)
566 return -ENOMEM;
567
568 up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
569 if (!up->data) {
570 kfree(up);
571 return -ENOMEM;
572 }
573
574 up->size = 0;
575 spin_lock_irqsave(&uhci->lock, flags);
576 if (uhci->is_initialized)
577 up->size = uhci_sprint_schedule(uhci, up->data,
578 MAX_OUTPUT - EXTRA_SPACE);
579 spin_unlock_irqrestore(&uhci->lock, flags);
580
581 file->private_data = up;
582
583 return 0;
584}
585
586static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
587{
588 struct uhci_debug *up = file->private_data;
589 return no_seek_end_llseek_size(file, off, whence, up->size);
590}
591
592static ssize_t uhci_debug_read(struct file *file, char __user *buf,
593 size_t nbytes, loff_t *ppos)
594{
595 struct uhci_debug *up = file->private_data;
596 return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
597}
598
599static int uhci_debug_release(struct inode *inode, struct file *file)
600{
601 struct uhci_debug *up = file->private_data;
602
603 kfree(up->data);
604 kfree(up);
605
606 return 0;
607}
608
609static const struct file_operations uhci_debug_operations = {
610 .owner = THIS_MODULE,
611 .open = uhci_debug_open,
612 .llseek = uhci_debug_lseek,
613 .read = uhci_debug_read,
614 .release = uhci_debug_release,
615};
616#define UHCI_DEBUG_OPS
617
618#endif /* CONFIG_DEBUG_FS */
619
620#else /* CONFIG_DYNAMIC_DEBUG*/
621
622static inline void lprintk(char *buf)
623{}
624
625static inline int uhci_show_qh(struct uhci_hcd *uhci,
626 struct uhci_qh *qh, char *buf, int len, int space)
627{
628 return 0;
629}
630
631static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
632 char *buf, int len)
633{
634 return 0;
635}
636
637#endif
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 <asm/io.h>
16
17#include "uhci-hcd.h"
18
19static struct dentry *uhci_debugfs_root;
20
21#ifdef DEBUG
22
23/* Handle REALLY large printks so we don't overflow buffers */
24static void lprintk(char *buf)
25{
26 char *p;
27
28 /* Just write one line at a time */
29 while (buf) {
30 p = strchr(buf, '\n');
31 if (p)
32 *p = 0;
33 printk(KERN_DEBUG "%s\n", buf);
34 buf = p;
35 if (buf)
36 buf++;
37 }
38}
39
40static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
41 int len, int space)
42{
43 char *out = buf;
44 char *spid;
45 u32 status, token;
46
47 /* Try to make sure there's enough memory */
48 if (len < 160)
49 return 0;
50
51 status = td_status(uhci, td);
52 out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
53 hc32_to_cpu(uhci, 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(uhci, 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", hc32_to_cpu(uhci, td->buffer));
92
93 return out - buf;
94}
95
96static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
97 char *buf, int len, int space)
98{
99 char *out = buf;
100 struct uhci_td *td;
101 int i, nactive, ninactive;
102 char *ptype;
103
104 if (len < 200)
105 return 0;
106
107 out += sprintf(out, "urb_priv [%p] ", urbp);
108 out += sprintf(out, "urb [%p] ", urbp->urb);
109 out += sprintf(out, "qh [%p] ", urbp->qh);
110 out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
111 out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe),
112 (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
113
114 switch (usb_pipetype(urbp->urb->pipe)) {
115 case PIPE_ISOCHRONOUS: ptype = "ISO"; break;
116 case PIPE_INTERRUPT: ptype = "INT"; break;
117 case PIPE_BULK: ptype = "BLK"; break;
118 default:
119 case PIPE_CONTROL: ptype = "CTL"; break;
120 }
121
122 out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : ""));
123 out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length,
124 (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ?
125 "-8" : ""));
126
127 if (urbp->urb->unlinked)
128 out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked);
129 out += sprintf(out, "\n");
130
131 i = nactive = ninactive = 0;
132 list_for_each_entry(td, &urbp->td_list, list) {
133 if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
134 (++i <= 10 || debug > 2)) {
135 out += sprintf(out, "%*s%d: ", space + 2, "", i);
136 out += uhci_show_td(uhci, td, out,
137 len - (out - buf), 0);
138 } else {
139 if (td_status(uhci, td) & TD_CTRL_ACTIVE)
140 ++nactive;
141 else
142 ++ninactive;
143 }
144 }
145 if (nactive + ninactive > 0)
146 out += sprintf(out, "%*s[skipped %d inactive and %d active "
147 "TDs]\n",
148 space, "", ninactive, nactive);
149
150 return out - buf;
151}
152
153static int uhci_show_qh(struct uhci_hcd *uhci,
154 struct uhci_qh *qh, char *buf, int len, int space)
155{
156 char *out = buf;
157 int i, nurbs;
158 __hc32 element = qh_element(qh);
159 char *qtype;
160
161 /* Try to make sure there's enough memory */
162 if (len < 80 * 7)
163 return 0;
164
165 switch (qh->type) {
166 case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break;
167 case USB_ENDPOINT_XFER_INT: qtype = "INT"; break;
168 case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break;
169 case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break;
170 default: qtype = "Skel" ; break;
171 }
172
173 out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
174 space, "", qh, qtype,
175 hc32_to_cpu(uhci, qh->link),
176 hc32_to_cpu(uhci, element));
177 if (qh->type == USB_ENDPOINT_XFER_ISOC)
178 out += sprintf(out, "%*s period %d phase %d load %d us, "
179 "frame %x desc [%p]\n",
180 space, "", qh->period, qh->phase, qh->load,
181 qh->iso_frame, qh->iso_packet_desc);
182 else if (qh->type == USB_ENDPOINT_XFER_INT)
183 out += sprintf(out, "%*s period %d phase %d load %d us\n",
184 space, "", qh->period, qh->phase, qh->load);
185
186 if (element & UHCI_PTR_QH(uhci))
187 out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
188
189 if (element & UHCI_PTR_DEPTH(uhci))
190 out += sprintf(out, "%*s Depth traverse\n", space, "");
191
192 if (element & cpu_to_hc32(uhci, 8))
193 out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
194
195 if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci))))
196 out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
197
198 if (list_empty(&qh->queue)) {
199 out += sprintf(out, "%*s queue is empty\n", space, "");
200 if (qh == uhci->skel_async_qh)
201 out += uhci_show_td(uhci, uhci->term_td, out,
202 len - (out - buf), 0);
203 } else {
204 struct urb_priv *urbp = list_entry(qh->queue.next,
205 struct urb_priv, node);
206 struct uhci_td *td = list_entry(urbp->td_list.next,
207 struct uhci_td, list);
208
209 if (element != LINK_TO_TD(uhci, td))
210 out += sprintf(out, "%*s Element != First TD\n",
211 space, "");
212 i = nurbs = 0;
213 list_for_each_entry(urbp, &qh->queue, node) {
214 if (++i <= 10)
215 out += uhci_show_urbp(uhci, urbp, out,
216 len - (out - buf), space + 2);
217 else
218 ++nurbs;
219 }
220 if (nurbs > 0)
221 out += sprintf(out, "%*s Skipped %d URBs\n",
222 space, "", nurbs);
223 }
224
225 if (qh->dummy_td) {
226 out += sprintf(out, "%*s Dummy TD\n", space, "");
227 out += uhci_show_td(uhci, qh->dummy_td, out,
228 len - (out - buf), 0);
229 }
230
231 return out - buf;
232}
233
234static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
235{
236 char *out = buf;
237
238 /* Try to make sure there's enough memory */
239 if (len < 160)
240 return 0;
241
242 out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
243 port,
244 status,
245 (status & USBPORTSC_SUSP) ? " Suspend" : "",
246 (status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
247 (status & USBPORTSC_OC) ? " OverCurrent" : "",
248 (status & USBPORTSC_PR) ? " Reset" : "",
249 (status & USBPORTSC_LSDA) ? " LowSpeed" : "",
250 (status & USBPORTSC_RD) ? " ResumeDetect" : "",
251 (status & USBPORTSC_PEC) ? " EnableChange" : "",
252 (status & USBPORTSC_PE) ? " Enabled" : "",
253 (status & USBPORTSC_CSC) ? " ConnectChange" : "",
254 (status & USBPORTSC_CCS) ? " Connected" : "");
255
256 return out - buf;
257}
258
259static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
260{
261 char *out = buf;
262 char *rh_state;
263
264 /* Try to make sure there's enough memory */
265 if (len < 60)
266 return 0;
267
268 switch (uhci->rh_state) {
269 case UHCI_RH_RESET:
270 rh_state = "reset"; break;
271 case UHCI_RH_SUSPENDED:
272 rh_state = "suspended"; break;
273 case UHCI_RH_AUTO_STOPPED:
274 rh_state = "auto-stopped"; break;
275 case UHCI_RH_RESUMING:
276 rh_state = "resuming"; break;
277 case UHCI_RH_SUSPENDING:
278 rh_state = "suspending"; break;
279 case UHCI_RH_RUNNING:
280 rh_state = "running"; break;
281 case UHCI_RH_RUNNING_NODEVS:
282 rh_state = "running, no devs"; break;
283 default:
284 rh_state = "?"; break;
285 }
286 out += sprintf(out, "Root-hub state: %s FSBR: %d\n",
287 rh_state, uhci->fsbr_is_on);
288 return out - buf;
289}
290
291static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
292{
293 char *out = buf;
294 unsigned short usbcmd, usbstat, usbint, usbfrnum;
295 unsigned int flbaseadd;
296 unsigned char sof;
297 unsigned short portsc1, portsc2;
298
299 /* Try to make sure there's enough memory */
300 if (len < 80 * 9)
301 return 0;
302
303 usbcmd = uhci_readw(uhci, 0);
304 usbstat = uhci_readw(uhci, 2);
305 usbint = uhci_readw(uhci, 4);
306 usbfrnum = uhci_readw(uhci, 6);
307 flbaseadd = uhci_readl(uhci, 8);
308 sof = uhci_readb(uhci, 12);
309 portsc1 = uhci_readw(uhci, 16);
310 portsc2 = uhci_readw(uhci, 18);
311
312 out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
313 usbcmd,
314 (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
315 (usbcmd & USBCMD_CF) ? "CF " : "",
316 (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
317 (usbcmd & USBCMD_FGR) ? "FGR " : "",
318 (usbcmd & USBCMD_EGSM) ? "EGSM " : "",
319 (usbcmd & USBCMD_GRESET) ? "GRESET " : "",
320 (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
321 (usbcmd & USBCMD_RS) ? "RS " : "");
322
323 out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
324 usbstat,
325 (usbstat & USBSTS_HCH) ? "HCHalted " : "",
326 (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
327 (usbstat & USBSTS_HSE) ? "HostSystemError " : "",
328 (usbstat & USBSTS_RD) ? "ResumeDetect " : "",
329 (usbstat & USBSTS_ERROR) ? "USBError " : "",
330 (usbstat & USBSTS_USBINT) ? "USBINT " : "");
331
332 out += sprintf(out, " usbint = %04x\n", usbint);
333 out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
334 0xfff & (4*(unsigned int)usbfrnum));
335 out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
336 out += sprintf(out, " sof = %02x\n", sof);
337 out += uhci_show_sc(1, portsc1, out, len - (out - buf));
338 out += uhci_show_sc(2, portsc2, out, len - (out - buf));
339 out += sprintf(out, "Most recent frame: %x (%d) "
340 "Last ISO frame: %x (%d)\n",
341 uhci->frame_number, uhci->frame_number & 1023,
342 uhci->last_iso_frame, uhci->last_iso_frame & 1023);
343
344 return out - buf;
345}
346
347static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
348{
349 char *out = buf;
350 int i, j;
351 struct uhci_qh *qh;
352 struct uhci_td *td;
353 struct list_head *tmp, *head;
354 int nframes, nerrs;
355 __hc32 link;
356 __hc32 fsbr_link;
357
358 static const char * const qh_names[] = {
359 "unlink", "iso", "int128", "int64", "int32", "int16",
360 "int8", "int4", "int2", "async", "term"
361 };
362
363 out += uhci_show_root_hub_state(uhci, out, len - (out - buf));
364 out += sprintf(out, "HC status\n");
365 out += uhci_show_status(uhci, out, len - (out - buf));
366
367 out += sprintf(out, "Periodic load table\n");
368 for (i = 0; i < MAX_PHASE; ++i) {
369 out += sprintf(out, "\t%d", uhci->load[i]);
370 if (i % 8 == 7)
371 *out++ = '\n';
372 }
373 out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n",
374 uhci->total_load,
375 uhci_to_hcd(uhci)->self.bandwidth_int_reqs,
376 uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs);
377 if (debug <= 1)
378 return out - buf;
379
380 out += sprintf(out, "Frame List\n");
381 nframes = 10;
382 nerrs = 0;
383 for (i = 0; i < UHCI_NUMFRAMES; ++i) {
384 __hc32 qh_dma;
385
386 j = 0;
387 td = uhci->frame_cpu[i];
388 link = uhci->frame[i];
389 if (!td)
390 goto check_link;
391
392 if (nframes > 0) {
393 out += sprintf(out, "- Frame %d -> (%08x)\n",
394 i, hc32_to_cpu(uhci, link));
395 j = 1;
396 }
397
398 head = &td->fl_list;
399 tmp = head;
400 do {
401 td = list_entry(tmp, struct uhci_td, fl_list);
402 tmp = tmp->next;
403 if (link != LINK_TO_TD(uhci, td)) {
404 if (nframes > 0)
405 out += sprintf(out, " link does "
406 "not match list entry!\n");
407 else
408 ++nerrs;
409 }
410 if (nframes > 0)
411 out += uhci_show_td(uhci, td, out,
412 len - (out - buf), 4);
413 link = td->link;
414 } while (tmp != head);
415
416check_link:
417 qh_dma = uhci_frame_skel_link(uhci, i);
418 if (link != qh_dma) {
419 if (nframes > 0) {
420 if (!j) {
421 out += sprintf(out,
422 "- Frame %d -> (%08x)\n",
423 i, hc32_to_cpu(uhci, link));
424 j = 1;
425 }
426 out += sprintf(out, " link does not match "
427 "QH (%08x)!\n",
428 hc32_to_cpu(uhci, qh_dma));
429 } else
430 ++nerrs;
431 }
432 nframes -= j;
433 }
434 if (nerrs > 0)
435 out += sprintf(out, "Skipped %d bad links\n", nerrs);
436
437 out += sprintf(out, "Skeleton QHs\n");
438
439 fsbr_link = 0;
440 for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
441 int cnt = 0;
442
443 qh = uhci->skelqh[i];
444 out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \
445 out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4);
446
447 /* Last QH is the Terminating QH, it's different */
448 if (i == SKEL_TERM) {
449 if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td))
450 out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
451 link = fsbr_link;
452 if (!link)
453 link = LINK_TO_QH(uhci, uhci->skel_term_qh);
454 goto check_qh_link;
455 }
456
457 head = &qh->node;
458 tmp = head->next;
459
460 while (tmp != head) {
461 qh = list_entry(tmp, struct uhci_qh, node);
462 tmp = tmp->next;
463 if (++cnt <= 10)
464 out += uhci_show_qh(uhci, qh, out,
465 len - (out - buf), 4);
466 if (!fsbr_link && qh->skel >= SKEL_FSBR)
467 fsbr_link = LINK_TO_QH(uhci, qh);
468 }
469 if ((cnt -= 10) > 0)
470 out += sprintf(out, " Skipped %d QHs\n", cnt);
471
472 link = UHCI_PTR_TERM(uhci);
473 if (i <= SKEL_ISO)
474 ;
475 else if (i < SKEL_ASYNC)
476 link = LINK_TO_QH(uhci, uhci->skel_async_qh);
477 else if (!uhci->fsbr_is_on)
478 ;
479 else
480 link = LINK_TO_QH(uhci, uhci->skel_term_qh);
481check_qh_link:
482 if (qh->link != link)
483 out += sprintf(out, " last QH not linked to next skeleton!\n");
484 }
485
486 return out - buf;
487}
488
489#ifdef CONFIG_DEBUG_FS
490
491#define MAX_OUTPUT (64 * 1024)
492
493struct uhci_debug {
494 int size;
495 char *data;
496};
497
498static int uhci_debug_open(struct inode *inode, struct file *file)
499{
500 struct uhci_hcd *uhci = inode->i_private;
501 struct uhci_debug *up;
502 unsigned long flags;
503
504 up = kmalloc(sizeof(*up), GFP_KERNEL);
505 if (!up)
506 return -ENOMEM;
507
508 up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
509 if (!up->data) {
510 kfree(up);
511 return -ENOMEM;
512 }
513
514 up->size = 0;
515 spin_lock_irqsave(&uhci->lock, flags);
516 if (uhci->is_initialized)
517 up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
518 spin_unlock_irqrestore(&uhci->lock, flags);
519
520 file->private_data = up;
521
522 return 0;
523}
524
525static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
526{
527 struct uhci_debug *up;
528 loff_t new = -1;
529
530 up = file->private_data;
531
532 /* XXX: atomic 64bit seek access, but that needs to be fixed in the VFS */
533 switch (whence) {
534 case 0:
535 new = off;
536 break;
537 case 1:
538 new = file->f_pos + off;
539 break;
540 }
541
542 if (new < 0 || new > up->size)
543 return -EINVAL;
544
545 return (file->f_pos = new);
546}
547
548static ssize_t uhci_debug_read(struct file *file, char __user *buf,
549 size_t nbytes, loff_t *ppos)
550{
551 struct uhci_debug *up = file->private_data;
552 return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
553}
554
555static int uhci_debug_release(struct inode *inode, struct file *file)
556{
557 struct uhci_debug *up = file->private_data;
558
559 kfree(up->data);
560 kfree(up);
561
562 return 0;
563}
564
565static const struct file_operations uhci_debug_operations = {
566 .owner = THIS_MODULE,
567 .open = uhci_debug_open,
568 .llseek = uhci_debug_lseek,
569 .read = uhci_debug_read,
570 .release = uhci_debug_release,
571};
572#define UHCI_DEBUG_OPS
573
574#endif /* CONFIG_DEBUG_FS */
575
576#else /* DEBUG */
577
578static inline void lprintk(char *buf)
579{}
580
581static inline int uhci_show_qh(struct uhci_hcd *uhci,
582 struct uhci_qh *qh, char *buf, int len, int space)
583{
584 return 0;
585}
586
587static inline int uhci_sprint_schedule(struct uhci_hcd *uhci,
588 char *buf, int len)
589{
590 return 0;
591}
592
593#endif