Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * UHCI-specific debugging code. Invaluable when something | |
3 | * goes wrong, but don't get in my face. | |
4 | * | |
687f5f34 AS |
5 | * Kernel visible pointers are surrounded in []s and bus |
6 | * visible pointers are surrounded in ()s | |
1da177e4 LT |
7 | * |
8 | * (C) Copyright 1999 Linus Torvalds | |
9 | * (C) Copyright 1999-2001 Johannes Erdfelt | |
10 | */ | |
11 | ||
5a0e3ad6 | 12 | #include <linux/slab.h> |
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/debugfs.h> | |
1da177e4 LT |
15 | #include <asm/io.h> |
16 | ||
17 | #include "uhci-hcd.h" | |
18 | ||
8d402e1a AS |
19 | static struct dentry *uhci_debugfs_root; |
20 | ||
21 | #ifdef DEBUG | |
1da177e4 | 22 | |
687f5f34 | 23 | /* Handle REALLY large printks so we don't overflow buffers */ |
8d402e1a | 24 | static void lprintk(char *buf) |
1da177e4 LT |
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 | ||
51e2f62f JA |
40 | static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf, |
41 | int len, int space) | |
1da177e4 LT |
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 | ||
51e2f62f JA |
51 | status = td_status(uhci, td); |
52 | out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, | |
53 | hc32_to_cpu(uhci, td->link)); | |
1da177e4 LT |
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 | ||
51e2f62f | 68 | token = td_token(uhci, td); |
1da177e4 LT |
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); | |
51e2f62f | 91 | out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer)); |
1da177e4 LT |
92 | |
93 | return out - buf; | |
94 | } | |
95 | ||
51e2f62f JA |
96 | static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp, |
97 | char *buf, int len, int space) | |
1da177e4 LT |
98 | { |
99 | char *out = buf; | |
1da177e4 | 100 | struct uhci_td *td; |
dccf4a48 | 101 | int i, nactive, ninactive; |
4de7d2c2 | 102 | char *ptype; |
dccf4a48 AS |
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)) { | |
4de7d2c2 AS |
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; | |
dccf4a48 AS |
120 | } |
121 | ||
4de7d2c2 | 122 | out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : "")); |
7ea0a2bc AS |
123 | out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length, |
124 | (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ? | |
125 | "-8" : "")); | |
dccf4a48 | 126 | |
eb231054 AS |
127 | if (urbp->urb->unlinked) |
128 | out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked); | |
dccf4a48 AS |
129 | out += sprintf(out, "\n"); |
130 | ||
131 | i = nactive = ninactive = 0; | |
132 | list_for_each_entry(td, &urbp->td_list, list) { | |
c8155cc5 AS |
133 | if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC && |
134 | (++i <= 10 || debug > 2)) { | |
dccf4a48 | 135 | out += sprintf(out, "%*s%d: ", space + 2, "", i); |
51e2f62f JA |
136 | out += uhci_show_td(uhci, td, out, |
137 | len - (out - buf), 0); | |
dccf4a48 | 138 | } else { |
51e2f62f | 139 | if (td_status(uhci, td) & TD_CTRL_ACTIVE) |
dccf4a48 AS |
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 | ||
e009f1b2 AS |
153 | static int uhci_show_qh(struct uhci_hcd *uhci, |
154 | struct uhci_qh *qh, char *buf, int len, int space) | |
dccf4a48 AS |
155 | { |
156 | char *out = buf; | |
157 | int i, nurbs; | |
51e2f62f | 158 | __hc32 element = qh_element(qh); |
4de7d2c2 | 159 | char *qtype; |
1da177e4 LT |
160 | |
161 | /* Try to make sure there's enough memory */ | |
caf3827a | 162 | if (len < 80 * 7) |
1da177e4 LT |
163 | return 0; |
164 | ||
4de7d2c2 AS |
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, | |
51e2f62f JA |
175 | hc32_to_cpu(uhci, qh->link), |
176 | hc32_to_cpu(uhci, element)); | |
caf3827a | 177 | if (qh->type == USB_ENDPOINT_XFER_ISOC) |
3ca2a321 AS |
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); | |
1da177e4 | 185 | |
51e2f62f | 186 | if (element & UHCI_PTR_QH(uhci)) |
1da177e4 LT |
187 | out += sprintf(out, "%*s Element points to QH (bug?)\n", space, ""); |
188 | ||
51e2f62f | 189 | if (element & UHCI_PTR_DEPTH(uhci)) |
1da177e4 LT |
190 | out += sprintf(out, "%*s Depth traverse\n", space, ""); |
191 | ||
51e2f62f | 192 | if (element & cpu_to_hc32(uhci, 8)) |
1da177e4 LT |
193 | out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, ""); |
194 | ||
51e2f62f | 195 | if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci)))) |
1da177e4 LT |
196 | out += sprintf(out, "%*s Element is NULL (bug?)\n", space, ""); |
197 | ||
dccf4a48 AS |
198 | if (list_empty(&qh->queue)) { |
199 | out += sprintf(out, "%*s queue is empty\n", space, ""); | |
e009f1b2 | 200 | if (qh == uhci->skel_async_qh) |
51e2f62f | 201 | out += uhci_show_td(uhci, uhci->term_td, out, |
e009f1b2 | 202 | len - (out - buf), 0); |
dccf4a48 AS |
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 | ||
51e2f62f | 209 | if (element != LINK_TO_TD(uhci, td)) |
dccf4a48 AS |
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) | |
51e2f62f | 215 | out += uhci_show_urbp(uhci, urbp, out, |
dccf4a48 AS |
216 | len - (out - buf), space + 2); |
217 | else | |
218 | ++nurbs; | |
1da177e4 | 219 | } |
dccf4a48 AS |
220 | if (nurbs > 0) |
221 | out += sprintf(out, "%*s Skipped %d URBs\n", | |
222 | space, "", nurbs); | |
1da177e4 LT |
223 | } |
224 | ||
85a975d0 | 225 | if (qh->dummy_td) { |
af0bb599 | 226 | out += sprintf(out, "%*s Dummy TD\n", space, ""); |
51e2f62f JA |
227 | out += uhci_show_td(uhci, qh->dummy_td, out, |
228 | len - (out - buf), 0); | |
af0bb599 AS |
229 | } |
230 | ||
1da177e4 LT |
231 | return out - buf; |
232 | } | |
233 | ||
1da177e4 LT |
234 | static 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 | ||
c8f4fe43 AS |
259 | static 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 | } | |
84afddd7 AS |
286 | out += sprintf(out, "Root-hub state: %s FSBR: %d\n", |
287 | rh_state, uhci->fsbr_is_on); | |
c8f4fe43 AS |
288 | return out - buf; |
289 | } | |
290 | ||
1da177e4 LT |
291 | static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len) |
292 | { | |
293 | char *out = buf; | |
1da177e4 LT |
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 */ | |
c4334726 | 300 | if (len < 80 * 9) |
1da177e4 LT |
301 | return 0; |
302 | ||
9faa091a JA |
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); | |
1da177e4 LT |
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)); | |
c8155cc5 AS |
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); | |
1da177e4 LT |
343 | |
344 | return out - buf; | |
345 | } | |
346 | ||
1da177e4 LT |
347 | static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len) |
348 | { | |
1da177e4 LT |
349 | char *out = buf; |
350 | int i, j; | |
351 | struct uhci_qh *qh; | |
352 | struct uhci_td *td; | |
353 | struct list_head *tmp, *head; | |
f3fe239b | 354 | int nframes, nerrs; |
51e2f62f JA |
355 | __hc32 link; |
356 | __hc32 fsbr_link; | |
17230acd AS |
357 | |
358 | static const char * const qh_names[] = { | |
359 | "unlink", "iso", "int128", "int64", "int32", "int16", | |
360 | "int8", "int4", "int2", "async", "term" | |
361 | }; | |
1da177e4 | 362 | |
c8f4fe43 | 363 | out += uhci_show_root_hub_state(uhci, out, len - (out - buf)); |
1da177e4 LT |
364 | out += sprintf(out, "HC status\n"); |
365 | out += uhci_show_status(uhci, out, len - (out - buf)); | |
3ca2a321 AS |
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); | |
dccf4a48 AS |
377 | if (debug <= 1) |
378 | return out - buf; | |
1da177e4 LT |
379 | |
380 | out += sprintf(out, "Frame List\n"); | |
f3fe239b AS |
381 | nframes = 10; |
382 | nerrs = 0; | |
1da177e4 | 383 | for (i = 0; i < UHCI_NUMFRAMES; ++i) { |
51e2f62f | 384 | __hc32 qh_dma; |
f3fe239b AS |
385 | |
386 | j = 0; | |
a1d59ce8 | 387 | td = uhci->frame_cpu[i]; |
f3fe239b | 388 | link = uhci->frame[i]; |
1da177e4 | 389 | if (!td) |
f3fe239b | 390 | goto check_link; |
1da177e4 | 391 | |
f3fe239b AS |
392 | if (nframes > 0) { |
393 | out += sprintf(out, "- Frame %d -> (%08x)\n", | |
51e2f62f | 394 | i, hc32_to_cpu(uhci, link)); |
f3fe239b AS |
395 | j = 1; |
396 | } | |
1da177e4 LT |
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; | |
51e2f62f | 403 | if (link != LINK_TO_TD(uhci, td)) { |
f3fe239b AS |
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) | |
51e2f62f | 411 | out += uhci_show_td(uhci, td, out, |
f3fe239b AS |
412 | len - (out - buf), 4); |
413 | link = td->link; | |
1da177e4 | 414 | } while (tmp != head); |
f3fe239b AS |
415 | |
416 | check_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", | |
51e2f62f | 423 | i, hc32_to_cpu(uhci, link)); |
f3fe239b AS |
424 | j = 1; |
425 | } | |
426 | out += sprintf(out, " link does not match " | |
51e2f62f JA |
427 | "QH (%08x)!\n", |
428 | hc32_to_cpu(uhci, qh_dma)); | |
f3fe239b AS |
429 | } else |
430 | ++nerrs; | |
431 | } | |
432 | nframes -= j; | |
1da177e4 | 433 | } |
f3fe239b AS |
434 | if (nerrs > 0) |
435 | out += sprintf(out, "Skipped %d bad links\n", nerrs); | |
1da177e4 | 436 | |
687f5f34 | 437 | out += sprintf(out, "Skeleton QHs\n"); |
1da177e4 | 438 | |
e009f1b2 | 439 | fsbr_link = 0; |
1da177e4 | 440 | for (i = 0; i < UHCI_NUM_SKELQH; ++i) { |
dccf4a48 | 441 | int cnt = 0; |
1da177e4 LT |
442 | |
443 | qh = uhci->skelqh[i]; | |
17230acd | 444 | out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \ |
e009f1b2 | 445 | out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4); |
1da177e4 LT |
446 | |
447 | /* Last QH is the Terminating QH, it's different */ | |
17230acd | 448 | if (i == SKEL_TERM) { |
51e2f62f | 449 | if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) |
1da177e4 | 450 | out += sprintf(out, " skel_term_qh element is not set to term_td!\n"); |
e009f1b2 AS |
451 | link = fsbr_link; |
452 | if (!link) | |
51e2f62f | 453 | link = LINK_TO_QH(uhci, uhci->skel_term_qh); |
e009f1b2 | 454 | goto check_qh_link; |
1da177e4 LT |
455 | } |
456 | ||
dccf4a48 | 457 | head = &qh->node; |
1da177e4 LT |
458 | tmp = head->next; |
459 | ||
460 | while (tmp != head) { | |
dccf4a48 | 461 | qh = list_entry(tmp, struct uhci_qh, node); |
1da177e4 | 462 | tmp = tmp->next; |
dccf4a48 | 463 | if (++cnt <= 10) |
e009f1b2 | 464 | out += uhci_show_qh(uhci, qh, out, |
dccf4a48 | 465 | len - (out - buf), 4); |
17230acd | 466 | if (!fsbr_link && qh->skel >= SKEL_FSBR) |
51e2f62f | 467 | fsbr_link = LINK_TO_QH(uhci, qh); |
1da177e4 | 468 | } |
dccf4a48 AS |
469 | if ((cnt -= 10) > 0) |
470 | out += sprintf(out, " Skipped %d QHs\n", cnt); | |
1da177e4 | 471 | |
51e2f62f | 472 | link = UHCI_PTR_TERM(uhci); |
17230acd AS |
473 | if (i <= SKEL_ISO) |
474 | ; | |
475 | else if (i < SKEL_ASYNC) | |
51e2f62f | 476 | link = LINK_TO_QH(uhci, uhci->skel_async_qh); |
17230acd AS |
477 | else if (!uhci->fsbr_is_on) |
478 | ; | |
17230acd | 479 | else |
51e2f62f | 480 | link = LINK_TO_QH(uhci, uhci->skel_term_qh); |
17230acd AS |
481 | check_qh_link: |
482 | if (qh->link != link) | |
483 | out += sprintf(out, " last QH not linked to next skeleton!\n"); | |
1da177e4 LT |
484 | } |
485 | ||
1da177e4 LT |
486 | return out - buf; |
487 | } | |
488 | ||
8d402e1a AS |
489 | #ifdef CONFIG_DEBUG_FS |
490 | ||
1da177e4 LT |
491 | #define MAX_OUTPUT (64 * 1024) |
492 | ||
493 | struct uhci_debug { | |
494 | int size; | |
495 | char *data; | |
1da177e4 LT |
496 | }; |
497 | ||
498 | static int uhci_debug_open(struct inode *inode, struct file *file) | |
499 | { | |
8e18e294 | 500 | struct uhci_hcd *uhci = inode->i_private; |
1da177e4 | 501 | struct uhci_debug *up; |
dccf4a48 | 502 | unsigned long flags; |
1da177e4 | 503 | |
1da177e4 LT |
504 | up = kmalloc(sizeof(*up), GFP_KERNEL); |
505 | if (!up) | |
00b81fb2 | 506 | return -ENOMEM; |
1da177e4 LT |
507 | |
508 | up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); | |
509 | if (!up->data) { | |
510 | kfree(up); | |
00b81fb2 | 511 | return -ENOMEM; |
1da177e4 LT |
512 | } |
513 | ||
8d402e1a | 514 | up->size = 0; |
dccf4a48 | 515 | spin_lock_irqsave(&uhci->lock, flags); |
8d402e1a AS |
516 | if (uhci->is_initialized) |
517 | up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT); | |
dccf4a48 | 518 | spin_unlock_irqrestore(&uhci->lock, flags); |
1da177e4 LT |
519 | |
520 | file->private_data = up; | |
521 | ||
00b81fb2 | 522 | return 0; |
1da177e4 LT |
523 | } |
524 | ||
525 | static 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 | ||
1da177e4 LT |
530 | up = file->private_data; |
531 | ||
00b81fb2 | 532 | /* XXX: atomic 64bit seek access, but that needs to be fixed in the VFS */ |
1da177e4 LT |
533 | switch (whence) { |
534 | case 0: | |
535 | new = off; | |
536 | break; | |
537 | case 1: | |
538 | new = file->f_pos + off; | |
539 | break; | |
540 | } | |
00b81fb2 AK |
541 | |
542 | if (new < 0 || new > up->size) | |
1da177e4 | 543 | return -EINVAL; |
00b81fb2 | 544 | |
1da177e4 LT |
545 | return (file->f_pos = new); |
546 | } | |
547 | ||
548 | static 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 | ||
555 | static 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 | ||
066202dd | 565 | static const struct file_operations uhci_debug_operations = { |
8d402e1a | 566 | .owner = THIS_MODULE, |
1da177e4 LT |
567 | .open = uhci_debug_open, |
568 | .llseek = uhci_debug_lseek, | |
569 | .read = uhci_debug_read, | |
570 | .release = uhci_debug_release, | |
571 | }; | |
b409214c | 572 | #define UHCI_DEBUG_OPS |
1da177e4 | 573 | |
8d402e1a | 574 | #endif /* CONFIG_DEBUG_FS */ |
1da177e4 | 575 | |
8d402e1a AS |
576 | #else /* DEBUG */ |
577 | ||
578 | static inline void lprintk(char *buf) | |
579 | {} | |
580 | ||
e009f1b2 AS |
581 | static inline int uhci_show_qh(struct uhci_hcd *uhci, |
582 | struct uhci_qh *qh, char *buf, int len, int space) | |
8d402e1a AS |
583 | { |
584 | return 0; | |
585 | } | |
586 | ||
587 | static inline int uhci_sprint_schedule(struct uhci_hcd *uhci, | |
588 | char *buf, int len) | |
589 | { | |
590 | return 0; | |
591 | } | |
1da177e4 LT |
592 | |
593 | #endif |