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> | |
15 | #include <linux/smp_lock.h> | |
16 | #include <asm/io.h> | |
17 | ||
18 | #include "uhci-hcd.h" | |
19 | ||
066202dd | 20 | #define uhci_debug_operations (* (const struct file_operations *) NULL) |
8d402e1a AS |
21 | static struct dentry *uhci_debugfs_root; |
22 | ||
23 | #ifdef DEBUG | |
1da177e4 | 24 | |
687f5f34 | 25 | /* Handle REALLY large printks so we don't overflow buffers */ |
8d402e1a | 26 | static void lprintk(char *buf) |
1da177e4 LT |
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 | ||
dccf4a48 | 96 | static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space) |
1da177e4 LT |
97 | { |
98 | char *out = buf; | |
1da177e4 | 99 | struct uhci_td *td; |
dccf4a48 | 100 | int i, nactive, ninactive; |
4de7d2c2 | 101 | char *ptype; |
dccf4a48 AS |
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)) { | |
4de7d2c2 AS |
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; | |
dccf4a48 AS |
119 | } |
120 | ||
4de7d2c2 | 121 | out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : "")); |
7ea0a2bc AS |
122 | out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length, |
123 | (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ? | |
124 | "-8" : "")); | |
dccf4a48 | 125 | |
eb231054 AS |
126 | if (urbp->urb->unlinked) |
127 | out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked); | |
dccf4a48 AS |
128 | out += sprintf(out, "\n"); |
129 | ||
130 | i = nactive = ninactive = 0; | |
131 | list_for_each_entry(td, &urbp->td_list, list) { | |
c8155cc5 AS |
132 | if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC && |
133 | (++i <= 10 || debug > 2)) { | |
dccf4a48 AS |
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 | ||
e009f1b2 AS |
151 | static int uhci_show_qh(struct uhci_hcd *uhci, |
152 | struct uhci_qh *qh, char *buf, int len, int space) | |
dccf4a48 AS |
153 | { |
154 | char *out = buf; | |
155 | int i, nurbs; | |
1da177e4 | 156 | __le32 element = qh_element(qh); |
4de7d2c2 | 157 | char *qtype; |
1da177e4 LT |
158 | |
159 | /* Try to make sure there's enough memory */ | |
caf3827a | 160 | if (len < 80 * 7) |
1da177e4 LT |
161 | return 0; |
162 | ||
4de7d2c2 AS |
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)); | |
caf3827a | 174 | if (qh->type == USB_ENDPOINT_XFER_ISOC) |
3ca2a321 AS |
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); | |
1da177e4 LT |
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 | ||
dccf4a48 AS |
195 | if (list_empty(&qh->queue)) { |
196 | out += sprintf(out, "%*s queue is empty\n", space, ""); | |
e009f1b2 AS |
197 | if (qh == uhci->skel_async_qh) |
198 | out += uhci_show_td(uhci->term_td, out, | |
199 | len - (out - buf), 0); | |
dccf4a48 AS |
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 | ||
28b9325e | 206 | if (element != LINK_TO_TD(td)) |
dccf4a48 AS |
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; | |
1da177e4 | 216 | } |
dccf4a48 AS |
217 | if (nurbs > 0) |
218 | out += sprintf(out, "%*s Skipped %d URBs\n", | |
219 | space, "", nurbs); | |
1da177e4 LT |
220 | } |
221 | ||
85a975d0 | 222 | if (qh->dummy_td) { |
af0bb599 AS |
223 | out += sprintf(out, "%*s Dummy TD\n", space, ""); |
224 | out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0); | |
225 | } | |
226 | ||
1da177e4 LT |
227 | return out - buf; |
228 | } | |
229 | ||
1da177e4 LT |
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 | ||
c8f4fe43 AS |
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 | } | |
84afddd7 AS |
282 | out += sprintf(out, "Root-hub state: %s FSBR: %d\n", |
283 | rh_state, uhci->fsbr_is_on); | |
c8f4fe43 AS |
284 | return out - buf; |
285 | } | |
286 | ||
1da177e4 LT |
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 */ | |
c4334726 | 297 | if (len < 80 * 9) |
1da177e4 LT |
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)); | |
c8155cc5 AS |
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); | |
1da177e4 LT |
340 | |
341 | return out - buf; | |
342 | } | |
343 | ||
1da177e4 LT |
344 | static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len) |
345 | { | |
1da177e4 LT |
346 | char *out = buf; |
347 | int i, j; | |
348 | struct uhci_qh *qh; | |
349 | struct uhci_td *td; | |
350 | struct list_head *tmp, *head; | |
f3fe239b | 351 | int nframes, nerrs; |
17230acd | 352 | __le32 link; |
e009f1b2 | 353 | __le32 fsbr_link; |
17230acd AS |
354 | |
355 | static const char * const qh_names[] = { | |
356 | "unlink", "iso", "int128", "int64", "int32", "int16", | |
357 | "int8", "int4", "int2", "async", "term" | |
358 | }; | |
1da177e4 | 359 | |
c8f4fe43 | 360 | out += uhci_show_root_hub_state(uhci, out, len - (out - buf)); |
1da177e4 LT |
361 | out += sprintf(out, "HC status\n"); |
362 | out += uhci_show_status(uhci, out, len - (out - buf)); | |
3ca2a321 AS |
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); | |
dccf4a48 AS |
374 | if (debug <= 1) |
375 | return out - buf; | |
1da177e4 LT |
376 | |
377 | out += sprintf(out, "Frame List\n"); | |
f3fe239b AS |
378 | nframes = 10; |
379 | nerrs = 0; | |
1da177e4 | 380 | for (i = 0; i < UHCI_NUMFRAMES; ++i) { |
17230acd | 381 | __le32 qh_dma; |
f3fe239b AS |
382 | |
383 | j = 0; | |
a1d59ce8 | 384 | td = uhci->frame_cpu[i]; |
f3fe239b | 385 | link = uhci->frame[i]; |
1da177e4 | 386 | if (!td) |
f3fe239b | 387 | goto check_link; |
1da177e4 | 388 | |
f3fe239b AS |
389 | if (nframes > 0) { |
390 | out += sprintf(out, "- Frame %d -> (%08x)\n", | |
391 | i, le32_to_cpu(link)); | |
392 | j = 1; | |
393 | } | |
1da177e4 LT |
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; | |
28b9325e | 400 | if (link != LINK_TO_TD(td)) { |
f3fe239b AS |
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; | |
1da177e4 | 411 | } while (tmp != head); |
f3fe239b AS |
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; | |
1da177e4 | 429 | } |
f3fe239b AS |
430 | if (nerrs > 0) |
431 | out += sprintf(out, "Skipped %d bad links\n", nerrs); | |
1da177e4 | 432 | |
687f5f34 | 433 | out += sprintf(out, "Skeleton QHs\n"); |
1da177e4 | 434 | |
e009f1b2 | 435 | fsbr_link = 0; |
1da177e4 | 436 | for (i = 0; i < UHCI_NUM_SKELQH; ++i) { |
dccf4a48 | 437 | int cnt = 0; |
1da177e4 LT |
438 | |
439 | qh = uhci->skelqh[i]; | |
17230acd | 440 | out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); \ |
e009f1b2 | 441 | out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4); |
1da177e4 LT |
442 | |
443 | /* Last QH is the Terminating QH, it's different */ | |
17230acd | 444 | if (i == SKEL_TERM) { |
28b9325e | 445 | if (qh_element(qh) != LINK_TO_TD(uhci->term_td)) |
1da177e4 | 446 | out += sprintf(out, " skel_term_qh element is not set to term_td!\n"); |
e009f1b2 AS |
447 | link = fsbr_link; |
448 | if (!link) | |
449 | link = LINK_TO_QH(uhci->skel_term_qh); | |
450 | goto check_qh_link; | |
1da177e4 LT |
451 | } |
452 | ||
dccf4a48 | 453 | head = &qh->node; |
1da177e4 LT |
454 | tmp = head->next; |
455 | ||
456 | while (tmp != head) { | |
dccf4a48 | 457 | qh = list_entry(tmp, struct uhci_qh, node); |
1da177e4 | 458 | tmp = tmp->next; |
dccf4a48 | 459 | if (++cnt <= 10) |
e009f1b2 | 460 | out += uhci_show_qh(uhci, qh, out, |
dccf4a48 | 461 | len - (out - buf), 4); |
17230acd AS |
462 | if (!fsbr_link && qh->skel >= SKEL_FSBR) |
463 | fsbr_link = LINK_TO_QH(qh); | |
1da177e4 | 464 | } |
dccf4a48 AS |
465 | if ((cnt -= 10) > 0) |
466 | out += sprintf(out, " Skipped %d QHs\n", cnt); | |
1da177e4 | 467 | |
17230acd AS |
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 | ; | |
17230acd AS |
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"); | |
1da177e4 LT |
480 | } |
481 | ||
1da177e4 LT |
482 | return out - buf; |
483 | } | |
484 | ||
8d402e1a AS |
485 | #ifdef CONFIG_DEBUG_FS |
486 | ||
1da177e4 LT |
487 | #define MAX_OUTPUT (64 * 1024) |
488 | ||
489 | struct uhci_debug { | |
490 | int size; | |
491 | char *data; | |
1da177e4 LT |
492 | }; |
493 | ||
494 | static int uhci_debug_open(struct inode *inode, struct file *file) | |
495 | { | |
8e18e294 | 496 | struct uhci_hcd *uhci = inode->i_private; |
1da177e4 LT |
497 | struct uhci_debug *up; |
498 | int ret = -ENOMEM; | |
dccf4a48 | 499 | unsigned long flags; |
1da177e4 LT |
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 | ||
8d402e1a | 512 | up->size = 0; |
dccf4a48 | 513 | spin_lock_irqsave(&uhci->lock, flags); |
8d402e1a AS |
514 | if (uhci->is_initialized) |
515 | up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT); | |
dccf4a48 | 516 | spin_unlock_irqrestore(&uhci->lock, flags); |
1da177e4 LT |
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 | ||
8d402e1a | 567 | #undef uhci_debug_operations |
066202dd | 568 | static const struct file_operations uhci_debug_operations = { |
8d402e1a | 569 | .owner = THIS_MODULE, |
1da177e4 LT |
570 | .open = uhci_debug_open, |
571 | .llseek = uhci_debug_lseek, | |
572 | .read = uhci_debug_read, | |
573 | .release = uhci_debug_release, | |
574 | }; | |
575 | ||
8d402e1a | 576 | #endif /* CONFIG_DEBUG_FS */ |
1da177e4 | 577 | |
8d402e1a AS |
578 | #else /* DEBUG */ |
579 | ||
580 | static inline void lprintk(char *buf) | |
581 | {} | |
582 | ||
e009f1b2 AS |
583 | static inline int uhci_show_qh(struct uhci_hcd *uhci, |
584 | struct uhci_qh *qh, char *buf, int len, int space) | |
8d402e1a AS |
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 | } | |
1da177e4 LT |
594 | |
595 | #endif |