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1 | /* | |
2 | * OHCI HCD (Host Controller Driver) for USB. | |
3 | * | |
4 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> | |
5 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> | |
6 | * | |
7 | * This file is licenced under the GPL. | |
8 | */ | |
9 | ||
10 | /*-------------------------------------------------------------------------*/ | |
11 | ||
12 | #define edstring(ed_type) ({ char *temp; \ | |
13 | switch (ed_type) { \ | |
14 | case PIPE_CONTROL: temp = "ctrl"; break; \ | |
15 | case PIPE_BULK: temp = "bulk"; break; \ | |
16 | case PIPE_INTERRUPT: temp = "intr"; break; \ | |
17 | default: temp = "isoc"; break; \ | |
18 | } temp;}) | |
19 | #define pipestring(pipe) edstring(usb_pipetype(pipe)) | |
20 | ||
21 | ||
22 | #define ohci_dbg_sw(ohci, next, size, format, arg...) \ | |
23 | do { \ | |
24 | if (next != NULL) { \ | |
25 | unsigned s_len; \ | |
26 | s_len = scnprintf (*next, *size, format, ## arg ); \ | |
27 | *size -= s_len; *next += s_len; \ | |
28 | } else \ | |
29 | ohci_dbg(ohci,format, ## arg ); \ | |
30 | } while (0); | |
31 | ||
32 | /* Version for use where "next" is the address of a local variable */ | |
33 | #define ohci_dbg_nosw(ohci, next, size, format, arg...) \ | |
34 | do { \ | |
35 | unsigned s_len; \ | |
36 | s_len = scnprintf(*next, *size, format, ## arg); \ | |
37 | *size -= s_len; *next += s_len; \ | |
38 | } while (0); | |
39 | ||
40 | ||
41 | static void ohci_dump_intr_mask ( | |
42 | struct ohci_hcd *ohci, | |
43 | char *label, | |
44 | u32 mask, | |
45 | char **next, | |
46 | unsigned *size) | |
47 | { | |
48 | ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n", | |
49 | label, | |
50 | mask, | |
51 | (mask & OHCI_INTR_MIE) ? " MIE" : "", | |
52 | (mask & OHCI_INTR_OC) ? " OC" : "", | |
53 | (mask & OHCI_INTR_RHSC) ? " RHSC" : "", | |
54 | (mask & OHCI_INTR_FNO) ? " FNO" : "", | |
55 | (mask & OHCI_INTR_UE) ? " UE" : "", | |
56 | (mask & OHCI_INTR_RD) ? " RD" : "", | |
57 | (mask & OHCI_INTR_SF) ? " SF" : "", | |
58 | (mask & OHCI_INTR_WDH) ? " WDH" : "", | |
59 | (mask & OHCI_INTR_SO) ? " SO" : "" | |
60 | ); | |
61 | } | |
62 | ||
63 | static void maybe_print_eds ( | |
64 | struct ohci_hcd *ohci, | |
65 | char *label, | |
66 | u32 value, | |
67 | char **next, | |
68 | unsigned *size) | |
69 | { | |
70 | if (value) | |
71 | ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value); | |
72 | } | |
73 | ||
74 | static char *hcfs2string (int state) | |
75 | { | |
76 | switch (state) { | |
77 | case OHCI_USB_RESET: return "reset"; | |
78 | case OHCI_USB_RESUME: return "resume"; | |
79 | case OHCI_USB_OPER: return "operational"; | |
80 | case OHCI_USB_SUSPEND: return "suspend"; | |
81 | } | |
82 | return "?"; | |
83 | } | |
84 | ||
85 | static const char *rh_state_string(struct ohci_hcd *ohci) | |
86 | { | |
87 | switch (ohci->rh_state) { | |
88 | case OHCI_RH_HALTED: | |
89 | return "halted"; | |
90 | case OHCI_RH_SUSPENDED: | |
91 | return "suspended"; | |
92 | case OHCI_RH_RUNNING: | |
93 | return "running"; | |
94 | } | |
95 | return "?"; | |
96 | } | |
97 | ||
98 | // dump control and status registers | |
99 | static void | |
100 | ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size) | |
101 | { | |
102 | struct ohci_regs __iomem *regs = controller->regs; | |
103 | u32 temp; | |
104 | ||
105 | temp = ohci_readl (controller, ®s->revision) & 0xff; | |
106 | ohci_dbg_sw (controller, next, size, | |
107 | "OHCI %d.%d, %s legacy support registers, rh state %s\n", | |
108 | 0x03 & (temp >> 4), (temp & 0x0f), | |
109 | (temp & 0x0100) ? "with" : "NO", | |
110 | rh_state_string(controller)); | |
111 | ||
112 | temp = ohci_readl (controller, ®s->control); | |
113 | ohci_dbg_sw (controller, next, size, | |
114 | "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n", | |
115 | temp, | |
116 | (temp & OHCI_CTRL_RWE) ? " RWE" : "", | |
117 | (temp & OHCI_CTRL_RWC) ? " RWC" : "", | |
118 | (temp & OHCI_CTRL_IR) ? " IR" : "", | |
119 | hcfs2string (temp & OHCI_CTRL_HCFS), | |
120 | (temp & OHCI_CTRL_BLE) ? " BLE" : "", | |
121 | (temp & OHCI_CTRL_CLE) ? " CLE" : "", | |
122 | (temp & OHCI_CTRL_IE) ? " IE" : "", | |
123 | (temp & OHCI_CTRL_PLE) ? " PLE" : "", | |
124 | temp & OHCI_CTRL_CBSR | |
125 | ); | |
126 | ||
127 | temp = ohci_readl (controller, ®s->cmdstatus); | |
128 | ohci_dbg_sw (controller, next, size, | |
129 | "cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp, | |
130 | (temp & OHCI_SOC) >> 16, | |
131 | (temp & OHCI_OCR) ? " OCR" : "", | |
132 | (temp & OHCI_BLF) ? " BLF" : "", | |
133 | (temp & OHCI_CLF) ? " CLF" : "", | |
134 | (temp & OHCI_HCR) ? " HCR" : "" | |
135 | ); | |
136 | ||
137 | ohci_dump_intr_mask (controller, "intrstatus", | |
138 | ohci_readl (controller, ®s->intrstatus), | |
139 | next, size); | |
140 | ohci_dump_intr_mask (controller, "intrenable", | |
141 | ohci_readl (controller, ®s->intrenable), | |
142 | next, size); | |
143 | // intrdisable always same as intrenable | |
144 | ||
145 | maybe_print_eds (controller, "ed_periodcurrent", | |
146 | ohci_readl (controller, ®s->ed_periodcurrent), | |
147 | next, size); | |
148 | ||
149 | maybe_print_eds (controller, "ed_controlhead", | |
150 | ohci_readl (controller, ®s->ed_controlhead), | |
151 | next, size); | |
152 | maybe_print_eds (controller, "ed_controlcurrent", | |
153 | ohci_readl (controller, ®s->ed_controlcurrent), | |
154 | next, size); | |
155 | ||
156 | maybe_print_eds (controller, "ed_bulkhead", | |
157 | ohci_readl (controller, ®s->ed_bulkhead), | |
158 | next, size); | |
159 | maybe_print_eds (controller, "ed_bulkcurrent", | |
160 | ohci_readl (controller, ®s->ed_bulkcurrent), | |
161 | next, size); | |
162 | ||
163 | maybe_print_eds (controller, "donehead", | |
164 | ohci_readl (controller, ®s->donehead), next, size); | |
165 | } | |
166 | ||
167 | #define dbg_port_sw(hc,num,value,next,size) \ | |
168 | ohci_dbg_sw (hc, next, size, \ | |
169 | "roothub.portstatus [%d] " \ | |
170 | "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ | |
171 | num, temp, \ | |
172 | (temp & RH_PS_PRSC) ? " PRSC" : "", \ | |
173 | (temp & RH_PS_OCIC) ? " OCIC" : "", \ | |
174 | (temp & RH_PS_PSSC) ? " PSSC" : "", \ | |
175 | (temp & RH_PS_PESC) ? " PESC" : "", \ | |
176 | (temp & RH_PS_CSC) ? " CSC" : "", \ | |
177 | \ | |
178 | (temp & RH_PS_LSDA) ? " LSDA" : "", \ | |
179 | (temp & RH_PS_PPS) ? " PPS" : "", \ | |
180 | (temp & RH_PS_PRS) ? " PRS" : "", \ | |
181 | (temp & RH_PS_POCI) ? " POCI" : "", \ | |
182 | (temp & RH_PS_PSS) ? " PSS" : "", \ | |
183 | \ | |
184 | (temp & RH_PS_PES) ? " PES" : "", \ | |
185 | (temp & RH_PS_CCS) ? " CCS" : "" \ | |
186 | ); | |
187 | ||
188 | ||
189 | static void | |
190 | ohci_dump_roothub ( | |
191 | struct ohci_hcd *controller, | |
192 | int verbose, | |
193 | char **next, | |
194 | unsigned *size) | |
195 | { | |
196 | u32 temp, i; | |
197 | ||
198 | temp = roothub_a (controller); | |
199 | if (temp == ~(u32)0) | |
200 | return; | |
201 | ||
202 | if (verbose) { | |
203 | ohci_dbg_sw (controller, next, size, | |
204 | "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp, | |
205 | ((temp & RH_A_POTPGT) >> 24) & 0xff, | |
206 | (temp & RH_A_NOCP) ? " NOCP" : "", | |
207 | (temp & RH_A_OCPM) ? " OCPM" : "", | |
208 | (temp & RH_A_DT) ? " DT" : "", | |
209 | (temp & RH_A_NPS) ? " NPS" : "", | |
210 | (temp & RH_A_PSM) ? " PSM" : "", | |
211 | (temp & RH_A_NDP), controller->num_ports | |
212 | ); | |
213 | temp = roothub_b (controller); | |
214 | ohci_dbg_sw (controller, next, size, | |
215 | "roothub.b %08x PPCM=%04x DR=%04x\n", | |
216 | temp, | |
217 | (temp & RH_B_PPCM) >> 16, | |
218 | (temp & RH_B_DR) | |
219 | ); | |
220 | temp = roothub_status (controller); | |
221 | ohci_dbg_sw (controller, next, size, | |
222 | "roothub.status %08x%s%s%s%s%s%s\n", | |
223 | temp, | |
224 | (temp & RH_HS_CRWE) ? " CRWE" : "", | |
225 | (temp & RH_HS_OCIC) ? " OCIC" : "", | |
226 | (temp & RH_HS_LPSC) ? " LPSC" : "", | |
227 | (temp & RH_HS_DRWE) ? " DRWE" : "", | |
228 | (temp & RH_HS_OCI) ? " OCI" : "", | |
229 | (temp & RH_HS_LPS) ? " LPS" : "" | |
230 | ); | |
231 | } | |
232 | ||
233 | for (i = 0; i < controller->num_ports; i++) { | |
234 | temp = roothub_portstatus (controller, i); | |
235 | dbg_port_sw (controller, i, temp, next, size); | |
236 | } | |
237 | } | |
238 | ||
239 | static void ohci_dump(struct ohci_hcd *controller) | |
240 | { | |
241 | ohci_dbg (controller, "OHCI controller state\n"); | |
242 | ||
243 | // dumps some of the state we know about | |
244 | ohci_dump_status (controller, NULL, NULL); | |
245 | if (controller->hcca) | |
246 | ohci_dbg (controller, | |
247 | "hcca frame #%04x\n", ohci_frame_no(controller)); | |
248 | ohci_dump_roothub (controller, 1, NULL, NULL); | |
249 | } | |
250 | ||
251 | static const char data0 [] = "DATA0"; | |
252 | static const char data1 [] = "DATA1"; | |
253 | ||
254 | static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label, | |
255 | const struct td *td) | |
256 | { | |
257 | u32 tmp = hc32_to_cpup (ohci, &td->hwINFO); | |
258 | ||
259 | ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n", | |
260 | label, td, | |
261 | (tmp & TD_DONE) ? " (DONE)" : "", | |
262 | td->urb, td->index, | |
263 | hc32_to_cpup (ohci, &td->hwNextTD)); | |
264 | if ((tmp & TD_ISO) == 0) { | |
265 | const char *toggle, *pid; | |
266 | u32 cbp, be; | |
267 | ||
268 | switch (tmp & TD_T) { | |
269 | case TD_T_DATA0: toggle = data0; break; | |
270 | case TD_T_DATA1: toggle = data1; break; | |
271 | case TD_T_TOGGLE: toggle = "(CARRY)"; break; | |
272 | default: toggle = "(?)"; break; | |
273 | } | |
274 | switch (tmp & TD_DP) { | |
275 | case TD_DP_SETUP: pid = "SETUP"; break; | |
276 | case TD_DP_IN: pid = "IN"; break; | |
277 | case TD_DP_OUT: pid = "OUT"; break; | |
278 | default: pid = "(bad pid)"; break; | |
279 | } | |
280 | ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp, | |
281 | TD_CC_GET(tmp), /* EC, */ toggle, | |
282 | (tmp & TD_DI) >> 21, pid, | |
283 | (tmp & TD_R) ? "R" : ""); | |
284 | cbp = hc32_to_cpup (ohci, &td->hwCBP); | |
285 | be = hc32_to_cpup (ohci, &td->hwBE); | |
286 | ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be, | |
287 | cbp ? (be + 1 - cbp) : 0); | |
288 | } else { | |
289 | unsigned i; | |
290 | ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp, | |
291 | TD_CC_GET(tmp), | |
292 | (tmp >> 24) & 0x07, | |
293 | (tmp & TD_DI) >> 21, | |
294 | tmp & 0x0000ffff); | |
295 | ohci_dbg (ohci, " bp0 %08x be %08x\n", | |
296 | hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff, | |
297 | hc32_to_cpup (ohci, &td->hwBE)); | |
298 | for (i = 0; i < MAXPSW; i++) { | |
299 | u16 psw = ohci_hwPSW (ohci, td, i); | |
300 | int cc = (psw >> 12) & 0x0f; | |
301 | ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i, | |
302 | psw, cc, | |
303 | (cc >= 0x0e) ? "OFFSET" : "SIZE", | |
304 | psw & 0x0fff); | |
305 | } | |
306 | } | |
307 | } | |
308 | ||
309 | /* caller MUST own hcd spinlock if verbose is set! */ | |
310 | static void __maybe_unused | |
311 | ohci_dump_ed (const struct ohci_hcd *ohci, const char *label, | |
312 | const struct ed *ed, int verbose) | |
313 | { | |
314 | u32 tmp = hc32_to_cpu (ohci, ed->hwINFO); | |
315 | char *type = ""; | |
316 | ||
317 | ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n", | |
318 | label, | |
319 | ed, ed->state, edstring (ed->type), | |
320 | hc32_to_cpup (ohci, &ed->hwNextED)); | |
321 | switch (tmp & (ED_IN|ED_OUT)) { | |
322 | case ED_OUT: type = "-OUT"; break; | |
323 | case ED_IN: type = "-IN"; break; | |
324 | /* else from TDs ... control */ | |
325 | } | |
326 | ohci_dbg (ohci, | |
327 | " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp, | |
328 | 0x03ff & (tmp >> 16), | |
329 | (tmp & ED_DEQUEUE) ? " DQ" : "", | |
330 | (tmp & ED_ISO) ? " ISO" : "", | |
331 | (tmp & ED_SKIP) ? " SKIP" : "", | |
332 | (tmp & ED_LOWSPEED) ? " LOW" : "", | |
333 | 0x000f & (tmp >> 7), | |
334 | type, | |
335 | 0x007f & tmp); | |
336 | tmp = hc32_to_cpup (ohci, &ed->hwHeadP); | |
337 | ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n", | |
338 | tmp, | |
339 | (tmp & ED_C) ? data1 : data0, | |
340 | (tmp & ED_H) ? " HALT" : "", | |
341 | hc32_to_cpup (ohci, &ed->hwTailP), | |
342 | verbose ? "" : " (not listing)"); | |
343 | if (verbose) { | |
344 | struct list_head *tmp; | |
345 | ||
346 | /* use ed->td_list because HC concurrently modifies | |
347 | * hwNextTD as it accumulates ed_donelist. | |
348 | */ | |
349 | list_for_each (tmp, &ed->td_list) { | |
350 | struct td *td; | |
351 | td = list_entry (tmp, struct td, td_list); | |
352 | ohci_dump_td (ohci, " ->", td); | |
353 | } | |
354 | } | |
355 | } | |
356 | ||
357 | /*-------------------------------------------------------------------------*/ | |
358 | ||
359 | static int debug_async_open(struct inode *, struct file *); | |
360 | static int debug_periodic_open(struct inode *, struct file *); | |
361 | static int debug_registers_open(struct inode *, struct file *); | |
362 | static int debug_async_open(struct inode *, struct file *); | |
363 | static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); | |
364 | static int debug_close(struct inode *, struct file *); | |
365 | ||
366 | static const struct file_operations debug_async_fops = { | |
367 | .owner = THIS_MODULE, | |
368 | .open = debug_async_open, | |
369 | .read = debug_output, | |
370 | .release = debug_close, | |
371 | .llseek = default_llseek, | |
372 | }; | |
373 | static const struct file_operations debug_periodic_fops = { | |
374 | .owner = THIS_MODULE, | |
375 | .open = debug_periodic_open, | |
376 | .read = debug_output, | |
377 | .release = debug_close, | |
378 | .llseek = default_llseek, | |
379 | }; | |
380 | static const struct file_operations debug_registers_fops = { | |
381 | .owner = THIS_MODULE, | |
382 | .open = debug_registers_open, | |
383 | .read = debug_output, | |
384 | .release = debug_close, | |
385 | .llseek = default_llseek, | |
386 | }; | |
387 | ||
388 | static struct dentry *ohci_debug_root; | |
389 | ||
390 | struct debug_buffer { | |
391 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ | |
392 | struct ohci_hcd *ohci; | |
393 | struct mutex mutex; /* protect filling of buffer */ | |
394 | size_t count; /* number of characters filled into buffer */ | |
395 | char *page; | |
396 | }; | |
397 | ||
398 | static ssize_t | |
399 | show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed) | |
400 | { | |
401 | unsigned temp, size = count; | |
402 | ||
403 | if (!ed) | |
404 | return 0; | |
405 | ||
406 | /* print first --> last */ | |
407 | while (ed->ed_prev) | |
408 | ed = ed->ed_prev; | |
409 | ||
410 | /* dump a snapshot of the bulk or control schedule */ | |
411 | while (ed) { | |
412 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
413 | u32 headp = hc32_to_cpu (ohci, ed->hwHeadP); | |
414 | struct list_head *entry; | |
415 | struct td *td; | |
416 | ||
417 | temp = scnprintf (buf, size, | |
418 | "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s", | |
419 | ed, | |
420 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
421 | info & 0x7f, | |
422 | (info >> 7) & 0xf, | |
423 | (info & ED_IN) ? "in" : "out", | |
424 | 0x03ff & (info >> 16), | |
425 | info, | |
426 | (info & ED_SKIP) ? " s" : "", | |
427 | (headp & ED_H) ? " H" : "", | |
428 | (headp & ED_C) ? data1 : data0); | |
429 | size -= temp; | |
430 | buf += temp; | |
431 | ||
432 | list_for_each (entry, &ed->td_list) { | |
433 | u32 cbp, be; | |
434 | ||
435 | td = list_entry (entry, struct td, td_list); | |
436 | info = hc32_to_cpup (ohci, &td->hwINFO); | |
437 | cbp = hc32_to_cpup (ohci, &td->hwCBP); | |
438 | be = hc32_to_cpup (ohci, &td->hwBE); | |
439 | temp = scnprintf (buf, size, | |
440 | "\n\ttd %p %s %d cc=%x urb %p (%08x)", | |
441 | td, | |
442 | ({ char *pid; | |
443 | switch (info & TD_DP) { | |
444 | case TD_DP_SETUP: pid = "setup"; break; | |
445 | case TD_DP_IN: pid = "in"; break; | |
446 | case TD_DP_OUT: pid = "out"; break; | |
447 | default: pid = "(?)"; break; | |
448 | } pid;}), | |
449 | cbp ? (be + 1 - cbp) : 0, | |
450 | TD_CC_GET (info), td->urb, info); | |
451 | size -= temp; | |
452 | buf += temp; | |
453 | } | |
454 | ||
455 | temp = scnprintf (buf, size, "\n"); | |
456 | size -= temp; | |
457 | buf += temp; | |
458 | ||
459 | ed = ed->ed_next; | |
460 | } | |
461 | return count - size; | |
462 | } | |
463 | ||
464 | static ssize_t fill_async_buffer(struct debug_buffer *buf) | |
465 | { | |
466 | struct ohci_hcd *ohci; | |
467 | size_t temp, size; | |
468 | unsigned long flags; | |
469 | ||
470 | ohci = buf->ohci; | |
471 | size = PAGE_SIZE; | |
472 | ||
473 | /* display control and bulk lists together, for simplicity */ | |
474 | spin_lock_irqsave (&ohci->lock, flags); | |
475 | temp = show_list(ohci, buf->page, size, ohci->ed_controltail); | |
476 | temp += show_list(ohci, buf->page + temp, size - temp, | |
477 | ohci->ed_bulktail); | |
478 | spin_unlock_irqrestore (&ohci->lock, flags); | |
479 | ||
480 | return temp; | |
481 | } | |
482 | ||
483 | #define DBG_SCHED_LIMIT 64 | |
484 | ||
485 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) | |
486 | { | |
487 | struct ohci_hcd *ohci; | |
488 | struct ed **seen, *ed; | |
489 | unsigned long flags; | |
490 | unsigned temp, size, seen_count; | |
491 | char *next; | |
492 | unsigned i; | |
493 | ||
494 | seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC); | |
495 | if (!seen) | |
496 | return 0; | |
497 | seen_count = 0; | |
498 | ||
499 | ohci = buf->ohci; | |
500 | next = buf->page; | |
501 | size = PAGE_SIZE; | |
502 | ||
503 | temp = scnprintf (next, size, "size = %d\n", NUM_INTS); | |
504 | size -= temp; | |
505 | next += temp; | |
506 | ||
507 | /* dump a snapshot of the periodic schedule (and load) */ | |
508 | spin_lock_irqsave (&ohci->lock, flags); | |
509 | for (i = 0; i < NUM_INTS; i++) { | |
510 | ed = ohci->periodic[i]; | |
511 | if (!ed) | |
512 | continue; | |
513 | ||
514 | temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); | |
515 | size -= temp; | |
516 | next += temp; | |
517 | ||
518 | do { | |
519 | temp = scnprintf (next, size, " ed%d/%p", | |
520 | ed->interval, ed); | |
521 | size -= temp; | |
522 | next += temp; | |
523 | for (temp = 0; temp < seen_count; temp++) { | |
524 | if (seen [temp] == ed) | |
525 | break; | |
526 | } | |
527 | ||
528 | /* show more info the first time around */ | |
529 | if (temp == seen_count) { | |
530 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
531 | struct list_head *entry; | |
532 | unsigned qlen = 0; | |
533 | ||
534 | /* qlen measured here in TDs, not urbs */ | |
535 | list_for_each (entry, &ed->td_list) | |
536 | qlen++; | |
537 | ||
538 | temp = scnprintf (next, size, | |
539 | " (%cs dev%d ep%d%s-%s qlen %u" | |
540 | " max %d %08x%s%s)", | |
541 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
542 | info & 0x7f, | |
543 | (info >> 7) & 0xf, | |
544 | (info & ED_IN) ? "in" : "out", | |
545 | (info & ED_ISO) ? "iso" : "int", | |
546 | qlen, | |
547 | 0x03ff & (info >> 16), | |
548 | info, | |
549 | (info & ED_SKIP) ? " K" : "", | |
550 | (ed->hwHeadP & | |
551 | cpu_to_hc32(ohci, ED_H)) ? | |
552 | " H" : ""); | |
553 | size -= temp; | |
554 | next += temp; | |
555 | ||
556 | if (seen_count < DBG_SCHED_LIMIT) | |
557 | seen [seen_count++] = ed; | |
558 | ||
559 | ed = ed->ed_next; | |
560 | ||
561 | } else { | |
562 | /* we've seen it and what's after */ | |
563 | temp = 0; | |
564 | ed = NULL; | |
565 | } | |
566 | ||
567 | } while (ed); | |
568 | ||
569 | temp = scnprintf (next, size, "\n"); | |
570 | size -= temp; | |
571 | next += temp; | |
572 | } | |
573 | spin_unlock_irqrestore (&ohci->lock, flags); | |
574 | kfree (seen); | |
575 | ||
576 | return PAGE_SIZE - size; | |
577 | } | |
578 | #undef DBG_SCHED_LIMIT | |
579 | ||
580 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) | |
581 | { | |
582 | struct usb_hcd *hcd; | |
583 | struct ohci_hcd *ohci; | |
584 | struct ohci_regs __iomem *regs; | |
585 | unsigned long flags; | |
586 | unsigned temp, size; | |
587 | char *next; | |
588 | u32 rdata; | |
589 | ||
590 | ohci = buf->ohci; | |
591 | hcd = ohci_to_hcd(ohci); | |
592 | regs = ohci->regs; | |
593 | next = buf->page; | |
594 | size = PAGE_SIZE; | |
595 | ||
596 | spin_lock_irqsave (&ohci->lock, flags); | |
597 | ||
598 | /* dump driver info, then registers in spec order */ | |
599 | ||
600 | ohci_dbg_nosw(ohci, &next, &size, | |
601 | "bus %s, device %s\n" | |
602 | "%s\n" | |
603 | "%s\n", | |
604 | hcd->self.controller->bus->name, | |
605 | dev_name(hcd->self.controller), | |
606 | hcd->product_desc, | |
607 | hcd_name); | |
608 | ||
609 | if (!HCD_HW_ACCESSIBLE(hcd)) { | |
610 | size -= scnprintf (next, size, | |
611 | "SUSPENDED (no register access)\n"); | |
612 | goto done; | |
613 | } | |
614 | ||
615 | ohci_dump_status(ohci, &next, &size); | |
616 | ||
617 | /* hcca */ | |
618 | if (ohci->hcca) | |
619 | ohci_dbg_nosw(ohci, &next, &size, | |
620 | "hcca frame 0x%04x\n", ohci_frame_no(ohci)); | |
621 | ||
622 | /* other registers mostly affect frame timings */ | |
623 | rdata = ohci_readl (ohci, ®s->fminterval); | |
624 | temp = scnprintf (next, size, | |
625 | "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", | |
626 | rdata, (rdata >> 31) ? "FIT " : "", | |
627 | (rdata >> 16) & 0xefff, rdata & 0xffff); | |
628 | size -= temp; | |
629 | next += temp; | |
630 | ||
631 | rdata = ohci_readl (ohci, ®s->fmremaining); | |
632 | temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", | |
633 | rdata, (rdata >> 31) ? "FRT " : "", | |
634 | rdata & 0x3fff); | |
635 | size -= temp; | |
636 | next += temp; | |
637 | ||
638 | rdata = ohci_readl (ohci, ®s->periodicstart); | |
639 | temp = scnprintf (next, size, "periodicstart 0x%04x\n", | |
640 | rdata & 0x3fff); | |
641 | size -= temp; | |
642 | next += temp; | |
643 | ||
644 | rdata = ohci_readl (ohci, ®s->lsthresh); | |
645 | temp = scnprintf (next, size, "lsthresh 0x%04x\n", | |
646 | rdata & 0x3fff); | |
647 | size -= temp; | |
648 | next += temp; | |
649 | ||
650 | temp = scnprintf (next, size, "hub poll timer %s\n", | |
651 | HCD_POLL_RH(ohci_to_hcd(ohci)) ? "ON" : "off"); | |
652 | size -= temp; | |
653 | next += temp; | |
654 | ||
655 | /* roothub */ | |
656 | ohci_dump_roothub (ohci, 1, &next, &size); | |
657 | ||
658 | done: | |
659 | spin_unlock_irqrestore (&ohci->lock, flags); | |
660 | ||
661 | return PAGE_SIZE - size; | |
662 | } | |
663 | ||
664 | static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci, | |
665 | ssize_t (*fill_func)(struct debug_buffer *)) | |
666 | { | |
667 | struct debug_buffer *buf; | |
668 | ||
669 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
670 | ||
671 | if (buf) { | |
672 | buf->ohci = ohci; | |
673 | buf->fill_func = fill_func; | |
674 | mutex_init(&buf->mutex); | |
675 | } | |
676 | ||
677 | return buf; | |
678 | } | |
679 | ||
680 | static int fill_buffer(struct debug_buffer *buf) | |
681 | { | |
682 | int ret = 0; | |
683 | ||
684 | if (!buf->page) | |
685 | buf->page = (char *)get_zeroed_page(GFP_KERNEL); | |
686 | ||
687 | if (!buf->page) { | |
688 | ret = -ENOMEM; | |
689 | goto out; | |
690 | } | |
691 | ||
692 | ret = buf->fill_func(buf); | |
693 | ||
694 | if (ret >= 0) { | |
695 | buf->count = ret; | |
696 | ret = 0; | |
697 | } | |
698 | ||
699 | out: | |
700 | return ret; | |
701 | } | |
702 | ||
703 | static ssize_t debug_output(struct file *file, char __user *user_buf, | |
704 | size_t len, loff_t *offset) | |
705 | { | |
706 | struct debug_buffer *buf = file->private_data; | |
707 | int ret = 0; | |
708 | ||
709 | mutex_lock(&buf->mutex); | |
710 | if (buf->count == 0) { | |
711 | ret = fill_buffer(buf); | |
712 | if (ret != 0) { | |
713 | mutex_unlock(&buf->mutex); | |
714 | goto out; | |
715 | } | |
716 | } | |
717 | mutex_unlock(&buf->mutex); | |
718 | ||
719 | ret = simple_read_from_buffer(user_buf, len, offset, | |
720 | buf->page, buf->count); | |
721 | ||
722 | out: | |
723 | return ret; | |
724 | ||
725 | } | |
726 | ||
727 | static int debug_close(struct inode *inode, struct file *file) | |
728 | { | |
729 | struct debug_buffer *buf = file->private_data; | |
730 | ||
731 | if (buf) { | |
732 | if (buf->page) | |
733 | free_page((unsigned long)buf->page); | |
734 | kfree(buf); | |
735 | } | |
736 | ||
737 | return 0; | |
738 | } | |
739 | static int debug_async_open(struct inode *inode, struct file *file) | |
740 | { | |
741 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); | |
742 | ||
743 | return file->private_data ? 0 : -ENOMEM; | |
744 | } | |
745 | ||
746 | static int debug_periodic_open(struct inode *inode, struct file *file) | |
747 | { | |
748 | file->private_data = alloc_buffer(inode->i_private, | |
749 | fill_periodic_buffer); | |
750 | ||
751 | return file->private_data ? 0 : -ENOMEM; | |
752 | } | |
753 | ||
754 | static int debug_registers_open(struct inode *inode, struct file *file) | |
755 | { | |
756 | file->private_data = alloc_buffer(inode->i_private, | |
757 | fill_registers_buffer); | |
758 | ||
759 | return file->private_data ? 0 : -ENOMEM; | |
760 | } | |
761 | static inline void create_debug_files (struct ohci_hcd *ohci) | |
762 | { | |
763 | struct usb_bus *bus = &ohci_to_hcd(ohci)->self; | |
764 | ||
765 | ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root); | |
766 | if (!ohci->debug_dir) | |
767 | goto dir_error; | |
768 | ||
769 | ohci->debug_async = debugfs_create_file("async", S_IRUGO, | |
770 | ohci->debug_dir, ohci, | |
771 | &debug_async_fops); | |
772 | if (!ohci->debug_async) | |
773 | goto async_error; | |
774 | ||
775 | ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO, | |
776 | ohci->debug_dir, ohci, | |
777 | &debug_periodic_fops); | |
778 | if (!ohci->debug_periodic) | |
779 | goto periodic_error; | |
780 | ||
781 | ohci->debug_registers = debugfs_create_file("registers", S_IRUGO, | |
782 | ohci->debug_dir, ohci, | |
783 | &debug_registers_fops); | |
784 | if (!ohci->debug_registers) | |
785 | goto registers_error; | |
786 | ||
787 | ohci_dbg (ohci, "created debug files\n"); | |
788 | return; | |
789 | ||
790 | registers_error: | |
791 | debugfs_remove(ohci->debug_periodic); | |
792 | periodic_error: | |
793 | debugfs_remove(ohci->debug_async); | |
794 | async_error: | |
795 | debugfs_remove(ohci->debug_dir); | |
796 | dir_error: | |
797 | ohci->debug_periodic = NULL; | |
798 | ohci->debug_async = NULL; | |
799 | ohci->debug_dir = NULL; | |
800 | } | |
801 | ||
802 | static inline void remove_debug_files (struct ohci_hcd *ohci) | |
803 | { | |
804 | debugfs_remove(ohci->debug_registers); | |
805 | debugfs_remove(ohci->debug_periodic); | |
806 | debugfs_remove(ohci->debug_async); | |
807 | debugfs_remove(ohci->debug_dir); | |
808 | } | |
809 | ||
810 | /*-------------------------------------------------------------------------*/ | |
811 |