Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
1da177e4 LT |
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; \ | |
dd9048af | 17 | default: temp = "isoc"; break; \ |
2b84f92b | 18 | } temp;}) |
1da177e4 LT |
19 | #define pipestring(pipe) edstring(usb_pipetype(pipe)) |
20 | ||
1da177e4 LT |
21 | |
22 | #define ohci_dbg_sw(ohci, next, size, format, arg...) \ | |
23 | do { \ | |
bdd203a0 | 24 | if (next != NULL) { \ |
1da177e4 LT |
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 | ||
194b3af4 AS |
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 | ||
1da177e4 LT |
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 | ||
b7463c71 AS |
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 | ||
1da177e4 LT |
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, | |
b7463c71 | 107 | "OHCI %d.%d, %s legacy support registers, rh state %s\n", |
1da177e4 | 108 | 0x03 & (temp >> 4), (temp & 0x0f), |
b7463c71 AS |
109 | (temp & 0x0100) ? "with" : "NO", |
110 | rh_state_string(controller)); | |
1da177e4 LT |
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); | |
1da177e4 LT |
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" : "", \ | |
dd9048af | 177 | \ |
1da177e4 LT |
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" : "", \ | |
dd9048af | 183 | \ |
1da177e4 LT |
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 | { | |
fdd13b36 | 196 | u32 temp, i; |
1da177e4 LT |
197 | |
198 | temp = roothub_a (controller); | |
199 | if (temp == ~(u32)0) | |
200 | return; | |
1da177e4 LT |
201 | |
202 | if (verbose) { | |
203 | ohci_dbg_sw (controller, next, size, | |
fdd13b36 | 204 | "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp, |
1da177e4 LT |
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" : "", | |
fdd13b36 | 211 | (temp & RH_A_NDP), controller->num_ports |
1da177e4 LT |
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 | ||
fdd13b36 | 233 | for (i = 0; i < controller->num_ports; i++) { |
1da177e4 LT |
234 | temp = roothub_portstatus (controller, i); |
235 | dbg_port_sw (controller, i, temp, next, size); | |
236 | } | |
237 | } | |
238 | ||
256dbcd8 | 239 | static void ohci_dump(struct ohci_hcd *controller) |
1da177e4 LT |
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! */ | |
8234509c | 310 | static void __maybe_unused |
1da177e4 LT |
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 | ||
1da177e4 LT |
357 | /*-------------------------------------------------------------------------*/ |
358 | ||
684c19e0 TJ |
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, | |
6038f373 | 371 | .llseek = default_llseek, |
684c19e0 TJ |
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, | |
6038f373 | 378 | .llseek = default_llseek, |
684c19e0 TJ |
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, | |
6038f373 | 385 | .llseek = default_llseek, |
684c19e0 TJ |
386 | }; |
387 | ||
388 | static struct dentry *ohci_debug_root; | |
389 | ||
390 | struct debug_buffer { | |
391 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ | |
10983341 | 392 | struct ohci_hcd *ohci; |
684c19e0 TJ |
393 | struct mutex mutex; /* protect filling of buffer */ |
394 | size_t count; /* number of characters filled into buffer */ | |
395 | char *page; | |
396 | }; | |
397 | ||
1da177e4 LT |
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 | ||
684c19e0 | 464 | static ssize_t fill_async_buffer(struct debug_buffer *buf) |
1da177e4 | 465 | { |
1da177e4 | 466 | struct ohci_hcd *ohci; |
256dbcd8 | 467 | size_t temp, size; |
1da177e4 LT |
468 | unsigned long flags; |
469 | ||
10983341 | 470 | ohci = buf->ohci; |
256dbcd8 | 471 | size = PAGE_SIZE; |
1da177e4 LT |
472 | |
473 | /* display control and bulk lists together, for simplicity */ | |
474 | spin_lock_irqsave (&ohci->lock, flags); | |
256dbcd8 AS |
475 | temp = show_list(ohci, buf->page, size, ohci->ed_controltail); |
476 | temp += show_list(ohci, buf->page + temp, size - temp, | |
684c19e0 | 477 | ohci->ed_bulktail); |
1da177e4 LT |
478 | spin_unlock_irqrestore (&ohci->lock, flags); |
479 | ||
480 | return temp; | |
481 | } | |
1da177e4 LT |
482 | |
483 | #define DBG_SCHED_LIMIT 64 | |
484 | ||
684c19e0 | 485 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
1da177e4 | 486 | { |
1da177e4 LT |
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 | ||
54e6ecb2 | 494 | if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) |
1da177e4 LT |
495 | return 0; |
496 | seen_count = 0; | |
497 | ||
10983341 | 498 | ohci = buf->ohci; |
684c19e0 | 499 | next = buf->page; |
1da177e4 LT |
500 | size = PAGE_SIZE; |
501 | ||
502 | temp = scnprintf (next, size, "size = %d\n", NUM_INTS); | |
503 | size -= temp; | |
504 | next += temp; | |
505 | ||
506 | /* dump a snapshot of the periodic schedule (and load) */ | |
507 | spin_lock_irqsave (&ohci->lock, flags); | |
508 | for (i = 0; i < NUM_INTS; i++) { | |
509 | if (!(ed = ohci->periodic [i])) | |
510 | continue; | |
511 | ||
512 | temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); | |
513 | size -= temp; | |
514 | next += temp; | |
515 | ||
516 | do { | |
517 | temp = scnprintf (next, size, " ed%d/%p", | |
518 | ed->interval, ed); | |
519 | size -= temp; | |
520 | next += temp; | |
521 | for (temp = 0; temp < seen_count; temp++) { | |
522 | if (seen [temp] == ed) | |
523 | break; | |
524 | } | |
525 | ||
526 | /* show more info the first time around */ | |
527 | if (temp == seen_count) { | |
528 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
529 | struct list_head *entry; | |
530 | unsigned qlen = 0; | |
531 | ||
532 | /* qlen measured here in TDs, not urbs */ | |
533 | list_for_each (entry, &ed->td_list) | |
534 | qlen++; | |
535 | ||
536 | temp = scnprintf (next, size, | |
537 | " (%cs dev%d ep%d%s-%s qlen %u" | |
538 | " max %d %08x%s%s)", | |
539 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
540 | info & 0x7f, | |
541 | (info >> 7) & 0xf, | |
542 | (info & ED_IN) ? "in" : "out", | |
543 | (info & ED_ISO) ? "iso" : "int", | |
544 | qlen, | |
545 | 0x03ff & (info >> 16), | |
546 | info, | |
547 | (info & ED_SKIP) ? " K" : "", | |
548 | (ed->hwHeadP & | |
549 | cpu_to_hc32(ohci, ED_H)) ? | |
dd9048af | 550 | " H" : ""); |
1da177e4 LT |
551 | size -= temp; |
552 | next += temp; | |
553 | ||
554 | if (seen_count < DBG_SCHED_LIMIT) | |
555 | seen [seen_count++] = ed; | |
556 | ||
557 | ed = ed->ed_next; | |
558 | ||
559 | } else { | |
560 | /* we've seen it and what's after */ | |
561 | temp = 0; | |
562 | ed = NULL; | |
563 | } | |
564 | ||
565 | } while (ed); | |
566 | ||
567 | temp = scnprintf (next, size, "\n"); | |
568 | size -= temp; | |
569 | next += temp; | |
570 | } | |
571 | spin_unlock_irqrestore (&ohci->lock, flags); | |
572 | kfree (seen); | |
573 | ||
574 | return PAGE_SIZE - size; | |
575 | } | |
1da177e4 LT |
576 | #undef DBG_SCHED_LIMIT |
577 | ||
684c19e0 | 578 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
1da177e4 | 579 | { |
1da177e4 LT |
580 | struct usb_hcd *hcd; |
581 | struct ohci_hcd *ohci; | |
582 | struct ohci_regs __iomem *regs; | |
583 | unsigned long flags; | |
584 | unsigned temp, size; | |
585 | char *next; | |
586 | u32 rdata; | |
587 | ||
10983341 GKH |
588 | ohci = buf->ohci; |
589 | hcd = ohci_to_hcd(ohci); | |
1da177e4 | 590 | regs = ohci->regs; |
684c19e0 | 591 | next = buf->page; |
1da177e4 LT |
592 | size = PAGE_SIZE; |
593 | ||
594 | spin_lock_irqsave (&ohci->lock, flags); | |
595 | ||
596 | /* dump driver info, then registers in spec order */ | |
597 | ||
194b3af4 | 598 | ohci_dbg_nosw(ohci, &next, &size, |
1da177e4 LT |
599 | "bus %s, device %s\n" |
600 | "%s\n" | |
2b70f073 | 601 | "%s\n", |
1da177e4 | 602 | hcd->self.controller->bus->name, |
7071a3ce | 603 | dev_name(hcd->self.controller), |
1da177e4 LT |
604 | hcd->product_desc, |
605 | hcd_name); | |
606 | ||
541c7d43 | 607 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
1da177e4 LT |
608 | size -= scnprintf (next, size, |
609 | "SUSPENDED (no register access)\n"); | |
610 | goto done; | |
611 | } | |
612 | ||
613 | ohci_dump_status(ohci, &next, &size); | |
614 | ||
615 | /* hcca */ | |
616 | if (ohci->hcca) | |
194b3af4 | 617 | ohci_dbg_nosw(ohci, &next, &size, |
1da177e4 LT |
618 | "hcca frame 0x%04x\n", ohci_frame_no(ohci)); |
619 | ||
620 | /* other registers mostly affect frame timings */ | |
621 | rdata = ohci_readl (ohci, ®s->fminterval); | |
622 | temp = scnprintf (next, size, | |
623 | "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", | |
624 | rdata, (rdata >> 31) ? "FIT " : "", | |
625 | (rdata >> 16) & 0xefff, rdata & 0xffff); | |
626 | size -= temp; | |
627 | next += temp; | |
628 | ||
629 | rdata = ohci_readl (ohci, ®s->fmremaining); | |
630 | temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", | |
631 | rdata, (rdata >> 31) ? "FRT " : "", | |
632 | rdata & 0x3fff); | |
633 | size -= temp; | |
634 | next += temp; | |
635 | ||
636 | rdata = ohci_readl (ohci, ®s->periodicstart); | |
637 | temp = scnprintf (next, size, "periodicstart 0x%04x\n", | |
638 | rdata & 0x3fff); | |
639 | size -= temp; | |
640 | next += temp; | |
641 | ||
642 | rdata = ohci_readl (ohci, ®s->lsthresh); | |
643 | temp = scnprintf (next, size, "lsthresh 0x%04x\n", | |
644 | rdata & 0x3fff); | |
645 | size -= temp; | |
646 | next += temp; | |
647 | ||
d413984a | 648 | temp = scnprintf (next, size, "hub poll timer %s\n", |
541c7d43 | 649 | HCD_POLL_RH(ohci_to_hcd(ohci)) ? "ON" : "off"); |
d413984a DB |
650 | size -= temp; |
651 | next += temp; | |
652 | ||
1da177e4 LT |
653 | /* roothub */ |
654 | ohci_dump_roothub (ohci, 1, &next, &size); | |
655 | ||
656 | done: | |
657 | spin_unlock_irqrestore (&ohci->lock, flags); | |
684c19e0 | 658 | |
1da177e4 LT |
659 | return PAGE_SIZE - size; |
660 | } | |
1da177e4 | 661 | |
10983341 | 662 | static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci, |
684c19e0 TJ |
663 | ssize_t (*fill_func)(struct debug_buffer *)) |
664 | { | |
665 | struct debug_buffer *buf; | |
666 | ||
667 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
1da177e4 | 668 | |
684c19e0 | 669 | if (buf) { |
10983341 | 670 | buf->ohci = ohci; |
684c19e0 TJ |
671 | buf->fill_func = fill_func; |
672 | mutex_init(&buf->mutex); | |
673 | } | |
674 | ||
675 | return buf; | |
676 | } | |
677 | ||
678 | static int fill_buffer(struct debug_buffer *buf) | |
679 | { | |
680 | int ret = 0; | |
681 | ||
682 | if (!buf->page) | |
683 | buf->page = (char *)get_zeroed_page(GFP_KERNEL); | |
684 | ||
685 | if (!buf->page) { | |
686 | ret = -ENOMEM; | |
687 | goto out; | |
688 | } | |
689 | ||
690 | ret = buf->fill_func(buf); | |
691 | ||
692 | if (ret >= 0) { | |
693 | buf->count = ret; | |
694 | ret = 0; | |
695 | } | |
696 | ||
697 | out: | |
698 | return ret; | |
699 | } | |
700 | ||
701 | static ssize_t debug_output(struct file *file, char __user *user_buf, | |
702 | size_t len, loff_t *offset) | |
703 | { | |
704 | struct debug_buffer *buf = file->private_data; | |
705 | int ret = 0; | |
706 | ||
707 | mutex_lock(&buf->mutex); | |
708 | if (buf->count == 0) { | |
709 | ret = fill_buffer(buf); | |
710 | if (ret != 0) { | |
711 | mutex_unlock(&buf->mutex); | |
712 | goto out; | |
713 | } | |
714 | } | |
715 | mutex_unlock(&buf->mutex); | |
716 | ||
717 | ret = simple_read_from_buffer(user_buf, len, offset, | |
718 | buf->page, buf->count); | |
719 | ||
720 | out: | |
721 | return ret; | |
722 | ||
723 | } | |
724 | ||
725 | static int debug_close(struct inode *inode, struct file *file) | |
726 | { | |
727 | struct debug_buffer *buf = file->private_data; | |
728 | ||
729 | if (buf) { | |
730 | if (buf->page) | |
731 | free_page((unsigned long)buf->page); | |
732 | kfree(buf); | |
733 | } | |
734 | ||
735 | return 0; | |
736 | } | |
737 | static int debug_async_open(struct inode *inode, struct file *file) | |
738 | { | |
739 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); | |
740 | ||
741 | return file->private_data ? 0 : -ENOMEM; | |
742 | } | |
743 | ||
744 | static int debug_periodic_open(struct inode *inode, struct file *file) | |
745 | { | |
746 | file->private_data = alloc_buffer(inode->i_private, | |
747 | fill_periodic_buffer); | |
748 | ||
749 | return file->private_data ? 0 : -ENOMEM; | |
750 | } | |
751 | ||
752 | static int debug_registers_open(struct inode *inode, struct file *file) | |
753 | { | |
754 | file->private_data = alloc_buffer(inode->i_private, | |
755 | fill_registers_buffer); | |
756 | ||
757 | return file->private_data ? 0 : -ENOMEM; | |
758 | } | |
1da177e4 LT |
759 | static inline void create_debug_files (struct ohci_hcd *ohci) |
760 | { | |
684c19e0 | 761 | struct usb_bus *bus = &ohci_to_hcd(ohci)->self; |
684c19e0 TJ |
762 | |
763 | ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root); | |
764 | if (!ohci->debug_dir) | |
765 | goto dir_error; | |
766 | ||
767 | ohci->debug_async = debugfs_create_file("async", S_IRUGO, | |
10983341 | 768 | ohci->debug_dir, ohci, |
684c19e0 TJ |
769 | &debug_async_fops); |
770 | if (!ohci->debug_async) | |
771 | goto async_error; | |
772 | ||
773 | ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO, | |
10983341 | 774 | ohci->debug_dir, ohci, |
684c19e0 TJ |
775 | &debug_periodic_fops); |
776 | if (!ohci->debug_periodic) | |
777 | goto periodic_error; | |
778 | ||
779 | ohci->debug_registers = debugfs_create_file("registers", S_IRUGO, | |
10983341 | 780 | ohci->debug_dir, ohci, |
684c19e0 TJ |
781 | &debug_registers_fops); |
782 | if (!ohci->debug_registers) | |
783 | goto registers_error; | |
1da177e4 | 784 | |
1da177e4 | 785 | ohci_dbg (ohci, "created debug files\n"); |
684c19e0 TJ |
786 | return; |
787 | ||
788 | registers_error: | |
789 | debugfs_remove(ohci->debug_periodic); | |
790 | periodic_error: | |
791 | debugfs_remove(ohci->debug_async); | |
792 | async_error: | |
793 | debugfs_remove(ohci->debug_dir); | |
794 | dir_error: | |
795 | ohci->debug_periodic = NULL; | |
796 | ohci->debug_async = NULL; | |
797 | ohci->debug_dir = NULL; | |
1da177e4 LT |
798 | } |
799 | ||
800 | static inline void remove_debug_files (struct ohci_hcd *ohci) | |
801 | { | |
684c19e0 TJ |
802 | debugfs_remove(ohci->debug_registers); |
803 | debugfs_remove(ohci->debug_periodic); | |
804 | debugfs_remove(ohci->debug_async); | |
805 | debugfs_remove(ohci->debug_dir); | |
1da177e4 LT |
806 | } |
807 | ||
1da177e4 LT |
808 | /*-------------------------------------------------------------------------*/ |
809 |