Commit | Line | Data |
---|---|---|
5fd54ace | 1 | // SPDX-License-Identifier: GPL-1.0+ |
1da177e4 LT |
2 | /* |
3 | * OHCI HCD (Host Controller Driver) for USB. | |
4 | * | |
5 | * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> | |
6 | * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> | |
7 | * | |
8 | * This file is licenced under the GPL. | |
9 | */ | |
10 | ||
11 | /*-------------------------------------------------------------------------*/ | |
12 | ||
1da177e4 LT |
13 | #define edstring(ed_type) ({ char *temp; \ |
14 | switch (ed_type) { \ | |
15 | case PIPE_CONTROL: temp = "ctrl"; break; \ | |
16 | case PIPE_BULK: temp = "bulk"; break; \ | |
17 | case PIPE_INTERRUPT: temp = "intr"; break; \ | |
dd9048af | 18 | default: temp = "isoc"; break; \ |
2b84f92b | 19 | } temp;}) |
1da177e4 LT |
20 | #define pipestring(pipe) edstring(usb_pipetype(pipe)) |
21 | ||
1da177e4 LT |
22 | |
23 | #define ohci_dbg_sw(ohci, next, size, format, arg...) \ | |
24 | do { \ | |
bdd203a0 | 25 | if (next != NULL) { \ |
1da177e4 LT |
26 | unsigned s_len; \ |
27 | s_len = scnprintf (*next, *size, format, ## arg ); \ | |
28 | *size -= s_len; *next += s_len; \ | |
29 | } else \ | |
30 | ohci_dbg(ohci,format, ## arg ); \ | |
31 | } while (0); | |
32 | ||
194b3af4 AS |
33 | /* Version for use where "next" is the address of a local variable */ |
34 | #define ohci_dbg_nosw(ohci, next, size, format, arg...) \ | |
35 | do { \ | |
36 | unsigned s_len; \ | |
37 | s_len = scnprintf(*next, *size, format, ## arg); \ | |
38 | *size -= s_len; *next += s_len; \ | |
39 | } while (0); | |
40 | ||
1da177e4 LT |
41 | |
42 | static void ohci_dump_intr_mask ( | |
43 | struct ohci_hcd *ohci, | |
44 | char *label, | |
45 | u32 mask, | |
46 | char **next, | |
47 | unsigned *size) | |
48 | { | |
49 | ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n", | |
50 | label, | |
51 | mask, | |
52 | (mask & OHCI_INTR_MIE) ? " MIE" : "", | |
53 | (mask & OHCI_INTR_OC) ? " OC" : "", | |
54 | (mask & OHCI_INTR_RHSC) ? " RHSC" : "", | |
55 | (mask & OHCI_INTR_FNO) ? " FNO" : "", | |
56 | (mask & OHCI_INTR_UE) ? " UE" : "", | |
57 | (mask & OHCI_INTR_RD) ? " RD" : "", | |
58 | (mask & OHCI_INTR_SF) ? " SF" : "", | |
59 | (mask & OHCI_INTR_WDH) ? " WDH" : "", | |
60 | (mask & OHCI_INTR_SO) ? " SO" : "" | |
61 | ); | |
62 | } | |
63 | ||
64 | static void maybe_print_eds ( | |
65 | struct ohci_hcd *ohci, | |
66 | char *label, | |
67 | u32 value, | |
68 | char **next, | |
69 | unsigned *size) | |
70 | { | |
71 | if (value) | |
72 | ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value); | |
73 | } | |
74 | ||
75 | static char *hcfs2string (int state) | |
76 | { | |
77 | switch (state) { | |
78 | case OHCI_USB_RESET: return "reset"; | |
79 | case OHCI_USB_RESUME: return "resume"; | |
80 | case OHCI_USB_OPER: return "operational"; | |
81 | case OHCI_USB_SUSPEND: return "suspend"; | |
82 | } | |
83 | return "?"; | |
84 | } | |
85 | ||
b7463c71 AS |
86 | static const char *rh_state_string(struct ohci_hcd *ohci) |
87 | { | |
88 | switch (ohci->rh_state) { | |
89 | case OHCI_RH_HALTED: | |
90 | return "halted"; | |
91 | case OHCI_RH_SUSPENDED: | |
92 | return "suspended"; | |
93 | case OHCI_RH_RUNNING: | |
94 | return "running"; | |
95 | } | |
96 | return "?"; | |
97 | } | |
98 | ||
1da177e4 LT |
99 | // dump control and status registers |
100 | static void | |
101 | ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size) | |
102 | { | |
103 | struct ohci_regs __iomem *regs = controller->regs; | |
104 | u32 temp; | |
105 | ||
106 | temp = ohci_readl (controller, ®s->revision) & 0xff; | |
107 | ohci_dbg_sw (controller, next, size, | |
b7463c71 | 108 | "OHCI %d.%d, %s legacy support registers, rh state %s\n", |
1da177e4 | 109 | 0x03 & (temp >> 4), (temp & 0x0f), |
b7463c71 AS |
110 | (temp & 0x0100) ? "with" : "NO", |
111 | rh_state_string(controller)); | |
1da177e4 LT |
112 | |
113 | temp = ohci_readl (controller, ®s->control); | |
114 | ohci_dbg_sw (controller, next, size, | |
115 | "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n", | |
116 | temp, | |
117 | (temp & OHCI_CTRL_RWE) ? " RWE" : "", | |
118 | (temp & OHCI_CTRL_RWC) ? " RWC" : "", | |
119 | (temp & OHCI_CTRL_IR) ? " IR" : "", | |
120 | hcfs2string (temp & OHCI_CTRL_HCFS), | |
121 | (temp & OHCI_CTRL_BLE) ? " BLE" : "", | |
122 | (temp & OHCI_CTRL_CLE) ? " CLE" : "", | |
123 | (temp & OHCI_CTRL_IE) ? " IE" : "", | |
124 | (temp & OHCI_CTRL_PLE) ? " PLE" : "", | |
125 | temp & OHCI_CTRL_CBSR | |
126 | ); | |
127 | ||
128 | temp = ohci_readl (controller, ®s->cmdstatus); | |
129 | ohci_dbg_sw (controller, next, size, | |
130 | "cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp, | |
131 | (temp & OHCI_SOC) >> 16, | |
132 | (temp & OHCI_OCR) ? " OCR" : "", | |
133 | (temp & OHCI_BLF) ? " BLF" : "", | |
134 | (temp & OHCI_CLF) ? " CLF" : "", | |
135 | (temp & OHCI_HCR) ? " HCR" : "" | |
136 | ); | |
137 | ||
138 | ohci_dump_intr_mask (controller, "intrstatus", | |
139 | ohci_readl (controller, ®s->intrstatus), | |
140 | next, size); | |
141 | ohci_dump_intr_mask (controller, "intrenable", | |
142 | ohci_readl (controller, ®s->intrenable), | |
143 | next, size); | |
144 | // intrdisable always same as intrenable | |
145 | ||
146 | maybe_print_eds (controller, "ed_periodcurrent", | |
147 | ohci_readl (controller, ®s->ed_periodcurrent), | |
148 | next, size); | |
149 | ||
150 | maybe_print_eds (controller, "ed_controlhead", | |
151 | ohci_readl (controller, ®s->ed_controlhead), | |
152 | next, size); | |
153 | maybe_print_eds (controller, "ed_controlcurrent", | |
154 | ohci_readl (controller, ®s->ed_controlcurrent), | |
155 | next, size); | |
156 | ||
157 | maybe_print_eds (controller, "ed_bulkhead", | |
158 | ohci_readl (controller, ®s->ed_bulkhead), | |
159 | next, size); | |
160 | maybe_print_eds (controller, "ed_bulkcurrent", | |
161 | ohci_readl (controller, ®s->ed_bulkcurrent), | |
162 | next, size); | |
163 | ||
164 | maybe_print_eds (controller, "donehead", | |
165 | ohci_readl (controller, ®s->donehead), next, size); | |
1da177e4 LT |
166 | } |
167 | ||
168 | #define dbg_port_sw(hc,num,value,next,size) \ | |
169 | ohci_dbg_sw (hc, next, size, \ | |
170 | "roothub.portstatus [%d] " \ | |
171 | "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ | |
172 | num, temp, \ | |
173 | (temp & RH_PS_PRSC) ? " PRSC" : "", \ | |
174 | (temp & RH_PS_OCIC) ? " OCIC" : "", \ | |
175 | (temp & RH_PS_PSSC) ? " PSSC" : "", \ | |
176 | (temp & RH_PS_PESC) ? " PESC" : "", \ | |
177 | (temp & RH_PS_CSC) ? " CSC" : "", \ | |
dd9048af | 178 | \ |
1da177e4 LT |
179 | (temp & RH_PS_LSDA) ? " LSDA" : "", \ |
180 | (temp & RH_PS_PPS) ? " PPS" : "", \ | |
181 | (temp & RH_PS_PRS) ? " PRS" : "", \ | |
182 | (temp & RH_PS_POCI) ? " POCI" : "", \ | |
183 | (temp & RH_PS_PSS) ? " PSS" : "", \ | |
dd9048af | 184 | \ |
1da177e4 LT |
185 | (temp & RH_PS_PES) ? " PES" : "", \ |
186 | (temp & RH_PS_CCS) ? " CCS" : "" \ | |
187 | ); | |
188 | ||
189 | ||
190 | static void | |
191 | ohci_dump_roothub ( | |
192 | struct ohci_hcd *controller, | |
193 | int verbose, | |
194 | char **next, | |
195 | unsigned *size) | |
196 | { | |
fdd13b36 | 197 | u32 temp, i; |
1da177e4 LT |
198 | |
199 | temp = roothub_a (controller); | |
200 | if (temp == ~(u32)0) | |
201 | return; | |
1da177e4 LT |
202 | |
203 | if (verbose) { | |
204 | ohci_dbg_sw (controller, next, size, | |
fdd13b36 | 205 | "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp, |
1da177e4 LT |
206 | ((temp & RH_A_POTPGT) >> 24) & 0xff, |
207 | (temp & RH_A_NOCP) ? " NOCP" : "", | |
208 | (temp & RH_A_OCPM) ? " OCPM" : "", | |
209 | (temp & RH_A_DT) ? " DT" : "", | |
210 | (temp & RH_A_NPS) ? " NPS" : "", | |
211 | (temp & RH_A_PSM) ? " PSM" : "", | |
fdd13b36 | 212 | (temp & RH_A_NDP), controller->num_ports |
1da177e4 LT |
213 | ); |
214 | temp = roothub_b (controller); | |
215 | ohci_dbg_sw (controller, next, size, | |
216 | "roothub.b %08x PPCM=%04x DR=%04x\n", | |
217 | temp, | |
218 | (temp & RH_B_PPCM) >> 16, | |
219 | (temp & RH_B_DR) | |
220 | ); | |
221 | temp = roothub_status (controller); | |
222 | ohci_dbg_sw (controller, next, size, | |
223 | "roothub.status %08x%s%s%s%s%s%s\n", | |
224 | temp, | |
225 | (temp & RH_HS_CRWE) ? " CRWE" : "", | |
226 | (temp & RH_HS_OCIC) ? " OCIC" : "", | |
227 | (temp & RH_HS_LPSC) ? " LPSC" : "", | |
228 | (temp & RH_HS_DRWE) ? " DRWE" : "", | |
229 | (temp & RH_HS_OCI) ? " OCI" : "", | |
230 | (temp & RH_HS_LPS) ? " LPS" : "" | |
231 | ); | |
232 | } | |
233 | ||
fdd13b36 | 234 | for (i = 0; i < controller->num_ports; i++) { |
1da177e4 LT |
235 | temp = roothub_portstatus (controller, i); |
236 | dbg_port_sw (controller, i, temp, next, size); | |
237 | } | |
238 | } | |
239 | ||
256dbcd8 | 240 | static void ohci_dump(struct ohci_hcd *controller) |
1da177e4 LT |
241 | { |
242 | ohci_dbg (controller, "OHCI controller state\n"); | |
243 | ||
244 | // dumps some of the state we know about | |
245 | ohci_dump_status (controller, NULL, NULL); | |
246 | if (controller->hcca) | |
247 | ohci_dbg (controller, | |
248 | "hcca frame #%04x\n", ohci_frame_no(controller)); | |
249 | ohci_dump_roothub (controller, 1, NULL, NULL); | |
250 | } | |
251 | ||
252 | static const char data0 [] = "DATA0"; | |
253 | static const char data1 [] = "DATA1"; | |
254 | ||
255 | static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label, | |
256 | const struct td *td) | |
257 | { | |
258 | u32 tmp = hc32_to_cpup (ohci, &td->hwINFO); | |
259 | ||
260 | ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n", | |
261 | label, td, | |
262 | (tmp & TD_DONE) ? " (DONE)" : "", | |
263 | td->urb, td->index, | |
264 | hc32_to_cpup (ohci, &td->hwNextTD)); | |
265 | if ((tmp & TD_ISO) == 0) { | |
266 | const char *toggle, *pid; | |
267 | u32 cbp, be; | |
268 | ||
269 | switch (tmp & TD_T) { | |
270 | case TD_T_DATA0: toggle = data0; break; | |
271 | case TD_T_DATA1: toggle = data1; break; | |
272 | case TD_T_TOGGLE: toggle = "(CARRY)"; break; | |
273 | default: toggle = "(?)"; break; | |
274 | } | |
275 | switch (tmp & TD_DP) { | |
276 | case TD_DP_SETUP: pid = "SETUP"; break; | |
277 | case TD_DP_IN: pid = "IN"; break; | |
278 | case TD_DP_OUT: pid = "OUT"; break; | |
279 | default: pid = "(bad pid)"; break; | |
280 | } | |
281 | ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp, | |
282 | TD_CC_GET(tmp), /* EC, */ toggle, | |
283 | (tmp & TD_DI) >> 21, pid, | |
284 | (tmp & TD_R) ? "R" : ""); | |
285 | cbp = hc32_to_cpup (ohci, &td->hwCBP); | |
286 | be = hc32_to_cpup (ohci, &td->hwBE); | |
287 | ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be, | |
288 | cbp ? (be + 1 - cbp) : 0); | |
289 | } else { | |
290 | unsigned i; | |
291 | ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp, | |
292 | TD_CC_GET(tmp), | |
293 | (tmp >> 24) & 0x07, | |
294 | (tmp & TD_DI) >> 21, | |
295 | tmp & 0x0000ffff); | |
296 | ohci_dbg (ohci, " bp0 %08x be %08x\n", | |
297 | hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff, | |
298 | hc32_to_cpup (ohci, &td->hwBE)); | |
299 | for (i = 0; i < MAXPSW; i++) { | |
300 | u16 psw = ohci_hwPSW (ohci, td, i); | |
301 | int cc = (psw >> 12) & 0x0f; | |
302 | ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i, | |
303 | psw, cc, | |
304 | (cc >= 0x0e) ? "OFFSET" : "SIZE", | |
305 | psw & 0x0fff); | |
306 | } | |
307 | } | |
308 | } | |
309 | ||
310 | /* caller MUST own hcd spinlock if verbose is set! */ | |
8234509c | 311 | static void __maybe_unused |
1da177e4 LT |
312 | ohci_dump_ed (const struct ohci_hcd *ohci, const char *label, |
313 | const struct ed *ed, int verbose) | |
314 | { | |
315 | u32 tmp = hc32_to_cpu (ohci, ed->hwINFO); | |
316 | char *type = ""; | |
317 | ||
318 | ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n", | |
319 | label, | |
320 | ed, ed->state, edstring (ed->type), | |
321 | hc32_to_cpup (ohci, &ed->hwNextED)); | |
322 | switch (tmp & (ED_IN|ED_OUT)) { | |
323 | case ED_OUT: type = "-OUT"; break; | |
324 | case ED_IN: type = "-IN"; break; | |
325 | /* else from TDs ... control */ | |
326 | } | |
327 | ohci_dbg (ohci, | |
328 | " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp, | |
329 | 0x03ff & (tmp >> 16), | |
330 | (tmp & ED_DEQUEUE) ? " DQ" : "", | |
331 | (tmp & ED_ISO) ? " ISO" : "", | |
332 | (tmp & ED_SKIP) ? " SKIP" : "", | |
333 | (tmp & ED_LOWSPEED) ? " LOW" : "", | |
334 | 0x000f & (tmp >> 7), | |
335 | type, | |
336 | 0x007f & tmp); | |
337 | tmp = hc32_to_cpup (ohci, &ed->hwHeadP); | |
338 | ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n", | |
339 | tmp, | |
340 | (tmp & ED_C) ? data1 : data0, | |
341 | (tmp & ED_H) ? " HALT" : "", | |
342 | hc32_to_cpup (ohci, &ed->hwTailP), | |
343 | verbose ? "" : " (not listing)"); | |
344 | if (verbose) { | |
345 | struct list_head *tmp; | |
346 | ||
347 | /* use ed->td_list because HC concurrently modifies | |
348 | * hwNextTD as it accumulates ed_donelist. | |
349 | */ | |
350 | list_for_each (tmp, &ed->td_list) { | |
351 | struct td *td; | |
352 | td = list_entry (tmp, struct td, td_list); | |
353 | ohci_dump_td (ohci, " ->", td); | |
354 | } | |
355 | } | |
356 | } | |
357 | ||
1da177e4 LT |
358 | /*-------------------------------------------------------------------------*/ |
359 | ||
684c19e0 TJ |
360 | static int debug_async_open(struct inode *, struct file *); |
361 | static int debug_periodic_open(struct inode *, struct file *); | |
362 | static int debug_registers_open(struct inode *, struct file *); | |
363 | static int debug_async_open(struct inode *, struct file *); | |
364 | static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); | |
365 | static int debug_close(struct inode *, struct file *); | |
366 | ||
367 | static const struct file_operations debug_async_fops = { | |
368 | .owner = THIS_MODULE, | |
369 | .open = debug_async_open, | |
370 | .read = debug_output, | |
371 | .release = debug_close, | |
6038f373 | 372 | .llseek = default_llseek, |
684c19e0 TJ |
373 | }; |
374 | static const struct file_operations debug_periodic_fops = { | |
375 | .owner = THIS_MODULE, | |
376 | .open = debug_periodic_open, | |
377 | .read = debug_output, | |
378 | .release = debug_close, | |
6038f373 | 379 | .llseek = default_llseek, |
684c19e0 TJ |
380 | }; |
381 | static const struct file_operations debug_registers_fops = { | |
382 | .owner = THIS_MODULE, | |
383 | .open = debug_registers_open, | |
384 | .read = debug_output, | |
385 | .release = debug_close, | |
6038f373 | 386 | .llseek = default_llseek, |
684c19e0 TJ |
387 | }; |
388 | ||
389 | static struct dentry *ohci_debug_root; | |
390 | ||
391 | struct debug_buffer { | |
392 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ | |
10983341 | 393 | struct ohci_hcd *ohci; |
684c19e0 TJ |
394 | struct mutex mutex; /* protect filling of buffer */ |
395 | size_t count; /* number of characters filled into buffer */ | |
396 | char *page; | |
397 | }; | |
398 | ||
1da177e4 LT |
399 | static ssize_t |
400 | show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed) | |
401 | { | |
402 | unsigned temp, size = count; | |
403 | ||
404 | if (!ed) | |
405 | return 0; | |
406 | ||
407 | /* print first --> last */ | |
408 | while (ed->ed_prev) | |
409 | ed = ed->ed_prev; | |
410 | ||
411 | /* dump a snapshot of the bulk or control schedule */ | |
412 | while (ed) { | |
413 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
414 | u32 headp = hc32_to_cpu (ohci, ed->hwHeadP); | |
415 | struct list_head *entry; | |
416 | struct td *td; | |
417 | ||
418 | temp = scnprintf (buf, size, | |
419 | "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s", | |
420 | ed, | |
421 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
422 | info & 0x7f, | |
423 | (info >> 7) & 0xf, | |
424 | (info & ED_IN) ? "in" : "out", | |
425 | 0x03ff & (info >> 16), | |
426 | info, | |
427 | (info & ED_SKIP) ? " s" : "", | |
428 | (headp & ED_H) ? " H" : "", | |
429 | (headp & ED_C) ? data1 : data0); | |
430 | size -= temp; | |
431 | buf += temp; | |
432 | ||
433 | list_for_each (entry, &ed->td_list) { | |
434 | u32 cbp, be; | |
435 | ||
436 | td = list_entry (entry, struct td, td_list); | |
437 | info = hc32_to_cpup (ohci, &td->hwINFO); | |
438 | cbp = hc32_to_cpup (ohci, &td->hwCBP); | |
439 | be = hc32_to_cpup (ohci, &td->hwBE); | |
440 | temp = scnprintf (buf, size, | |
441 | "\n\ttd %p %s %d cc=%x urb %p (%08x)", | |
442 | td, | |
443 | ({ char *pid; | |
444 | switch (info & TD_DP) { | |
445 | case TD_DP_SETUP: pid = "setup"; break; | |
446 | case TD_DP_IN: pid = "in"; break; | |
447 | case TD_DP_OUT: pid = "out"; break; | |
448 | default: pid = "(?)"; break; | |
449 | } pid;}), | |
450 | cbp ? (be + 1 - cbp) : 0, | |
451 | TD_CC_GET (info), td->urb, info); | |
452 | size -= temp; | |
453 | buf += temp; | |
454 | } | |
455 | ||
456 | temp = scnprintf (buf, size, "\n"); | |
457 | size -= temp; | |
458 | buf += temp; | |
459 | ||
460 | ed = ed->ed_next; | |
461 | } | |
462 | return count - size; | |
463 | } | |
464 | ||
684c19e0 | 465 | static ssize_t fill_async_buffer(struct debug_buffer *buf) |
1da177e4 | 466 | { |
1da177e4 | 467 | struct ohci_hcd *ohci; |
256dbcd8 | 468 | size_t temp, size; |
1da177e4 LT |
469 | unsigned long flags; |
470 | ||
10983341 | 471 | ohci = buf->ohci; |
256dbcd8 | 472 | size = PAGE_SIZE; |
1da177e4 LT |
473 | |
474 | /* display control and bulk lists together, for simplicity */ | |
475 | spin_lock_irqsave (&ohci->lock, flags); | |
256dbcd8 AS |
476 | temp = show_list(ohci, buf->page, size, ohci->ed_controltail); |
477 | temp += show_list(ohci, buf->page + temp, size - temp, | |
684c19e0 | 478 | ohci->ed_bulktail); |
1da177e4 LT |
479 | spin_unlock_irqrestore (&ohci->lock, flags); |
480 | ||
481 | return temp; | |
482 | } | |
1da177e4 LT |
483 | |
484 | #define DBG_SCHED_LIMIT 64 | |
485 | ||
684c19e0 | 486 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
1da177e4 | 487 | { |
1da177e4 LT |
488 | struct ohci_hcd *ohci; |
489 | struct ed **seen, *ed; | |
490 | unsigned long flags; | |
491 | unsigned temp, size, seen_count; | |
492 | char *next; | |
493 | unsigned i; | |
494 | ||
6da2ec56 | 495 | seen = kmalloc_array(DBG_SCHED_LIMIT, sizeof(*seen), GFP_ATOMIC); |
d0d6bc89 | 496 | if (!seen) |
1da177e4 LT |
497 | return 0; |
498 | seen_count = 0; | |
499 | ||
10983341 | 500 | ohci = buf->ohci; |
684c19e0 | 501 | next = buf->page; |
1da177e4 LT |
502 | size = PAGE_SIZE; |
503 | ||
504 | temp = scnprintf (next, size, "size = %d\n", NUM_INTS); | |
505 | size -= temp; | |
506 | next += temp; | |
507 | ||
508 | /* dump a snapshot of the periodic schedule (and load) */ | |
509 | spin_lock_irqsave (&ohci->lock, flags); | |
510 | for (i = 0; i < NUM_INTS; i++) { | |
d0d6bc89 GKH |
511 | ed = ohci->periodic[i]; |
512 | if (!ed) | |
1da177e4 LT |
513 | continue; |
514 | ||
515 | temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); | |
516 | size -= temp; | |
517 | next += temp; | |
518 | ||
519 | do { | |
520 | temp = scnprintf (next, size, " ed%d/%p", | |
521 | ed->interval, ed); | |
522 | size -= temp; | |
523 | next += temp; | |
524 | for (temp = 0; temp < seen_count; temp++) { | |
525 | if (seen [temp] == ed) | |
526 | break; | |
527 | } | |
528 | ||
529 | /* show more info the first time around */ | |
530 | if (temp == seen_count) { | |
531 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
532 | struct list_head *entry; | |
533 | unsigned qlen = 0; | |
534 | ||
535 | /* qlen measured here in TDs, not urbs */ | |
536 | list_for_each (entry, &ed->td_list) | |
537 | qlen++; | |
538 | ||
539 | temp = scnprintf (next, size, | |
540 | " (%cs dev%d ep%d%s-%s qlen %u" | |
541 | " max %d %08x%s%s)", | |
542 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
543 | info & 0x7f, | |
544 | (info >> 7) & 0xf, | |
545 | (info & ED_IN) ? "in" : "out", | |
546 | (info & ED_ISO) ? "iso" : "int", | |
547 | qlen, | |
548 | 0x03ff & (info >> 16), | |
549 | info, | |
550 | (info & ED_SKIP) ? " K" : "", | |
551 | (ed->hwHeadP & | |
552 | cpu_to_hc32(ohci, ED_H)) ? | |
dd9048af | 553 | " H" : ""); |
1da177e4 LT |
554 | size -= temp; |
555 | next += temp; | |
556 | ||
557 | if (seen_count < DBG_SCHED_LIMIT) | |
558 | seen [seen_count++] = ed; | |
559 | ||
560 | ed = ed->ed_next; | |
561 | ||
562 | } else { | |
563 | /* we've seen it and what's after */ | |
564 | temp = 0; | |
565 | ed = NULL; | |
566 | } | |
567 | ||
568 | } while (ed); | |
569 | ||
570 | temp = scnprintf (next, size, "\n"); | |
571 | size -= temp; | |
572 | next += temp; | |
573 | } | |
574 | spin_unlock_irqrestore (&ohci->lock, flags); | |
575 | kfree (seen); | |
576 | ||
577 | return PAGE_SIZE - size; | |
578 | } | |
1da177e4 LT |
579 | #undef DBG_SCHED_LIMIT |
580 | ||
684c19e0 | 581 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
1da177e4 | 582 | { |
1da177e4 LT |
583 | struct usb_hcd *hcd; |
584 | struct ohci_hcd *ohci; | |
585 | struct ohci_regs __iomem *regs; | |
586 | unsigned long flags; | |
587 | unsigned temp, size; | |
588 | char *next; | |
589 | u32 rdata; | |
590 | ||
10983341 GKH |
591 | ohci = buf->ohci; |
592 | hcd = ohci_to_hcd(ohci); | |
1da177e4 | 593 | regs = ohci->regs; |
684c19e0 | 594 | next = buf->page; |
1da177e4 LT |
595 | size = PAGE_SIZE; |
596 | ||
597 | spin_lock_irqsave (&ohci->lock, flags); | |
598 | ||
599 | /* dump driver info, then registers in spec order */ | |
600 | ||
194b3af4 | 601 | ohci_dbg_nosw(ohci, &next, &size, |
1da177e4 LT |
602 | "bus %s, device %s\n" |
603 | "%s\n" | |
2b70f073 | 604 | "%s\n", |
1da177e4 | 605 | hcd->self.controller->bus->name, |
7071a3ce | 606 | dev_name(hcd->self.controller), |
1da177e4 LT |
607 | hcd->product_desc, |
608 | hcd_name); | |
609 | ||
541c7d43 | 610 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
1da177e4 LT |
611 | size -= scnprintf (next, size, |
612 | "SUSPENDED (no register access)\n"); | |
613 | goto done; | |
614 | } | |
615 | ||
616 | ohci_dump_status(ohci, &next, &size); | |
617 | ||
618 | /* hcca */ | |
619 | if (ohci->hcca) | |
194b3af4 | 620 | ohci_dbg_nosw(ohci, &next, &size, |
1da177e4 LT |
621 | "hcca frame 0x%04x\n", ohci_frame_no(ohci)); |
622 | ||
623 | /* other registers mostly affect frame timings */ | |
624 | rdata = ohci_readl (ohci, ®s->fminterval); | |
625 | temp = scnprintf (next, size, | |
626 | "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", | |
627 | rdata, (rdata >> 31) ? "FIT " : "", | |
628 | (rdata >> 16) & 0xefff, rdata & 0xffff); | |
629 | size -= temp; | |
630 | next += temp; | |
631 | ||
632 | rdata = ohci_readl (ohci, ®s->fmremaining); | |
633 | temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", | |
634 | rdata, (rdata >> 31) ? "FRT " : "", | |
635 | rdata & 0x3fff); | |
636 | size -= temp; | |
637 | next += temp; | |
638 | ||
639 | rdata = ohci_readl (ohci, ®s->periodicstart); | |
640 | temp = scnprintf (next, size, "periodicstart 0x%04x\n", | |
641 | rdata & 0x3fff); | |
642 | size -= temp; | |
643 | next += temp; | |
644 | ||
645 | rdata = ohci_readl (ohci, ®s->lsthresh); | |
646 | temp = scnprintf (next, size, "lsthresh 0x%04x\n", | |
647 | rdata & 0x3fff); | |
648 | size -= temp; | |
649 | next += temp; | |
650 | ||
d413984a | 651 | temp = scnprintf (next, size, "hub poll timer %s\n", |
541c7d43 | 652 | HCD_POLL_RH(ohci_to_hcd(ohci)) ? "ON" : "off"); |
d413984a DB |
653 | size -= temp; |
654 | next += temp; | |
655 | ||
1da177e4 LT |
656 | /* roothub */ |
657 | ohci_dump_roothub (ohci, 1, &next, &size); | |
658 | ||
659 | done: | |
660 | spin_unlock_irqrestore (&ohci->lock, flags); | |
684c19e0 | 661 | |
1da177e4 LT |
662 | return PAGE_SIZE - size; |
663 | } | |
1da177e4 | 664 | |
10983341 | 665 | static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci, |
684c19e0 TJ |
666 | ssize_t (*fill_func)(struct debug_buffer *)) |
667 | { | |
668 | struct debug_buffer *buf; | |
669 | ||
670 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
1da177e4 | 671 | |
684c19e0 | 672 | if (buf) { |
10983341 | 673 | buf->ohci = ohci; |
684c19e0 TJ |
674 | buf->fill_func = fill_func; |
675 | mutex_init(&buf->mutex); | |
676 | } | |
677 | ||
678 | return buf; | |
679 | } | |
680 | ||
681 | static int fill_buffer(struct debug_buffer *buf) | |
682 | { | |
683 | int ret = 0; | |
684 | ||
685 | if (!buf->page) | |
686 | buf->page = (char *)get_zeroed_page(GFP_KERNEL); | |
687 | ||
688 | if (!buf->page) { | |
689 | ret = -ENOMEM; | |
690 | goto out; | |
691 | } | |
692 | ||
693 | ret = buf->fill_func(buf); | |
694 | ||
695 | if (ret >= 0) { | |
696 | buf->count = ret; | |
697 | ret = 0; | |
698 | } | |
699 | ||
700 | out: | |
701 | return ret; | |
702 | } | |
703 | ||
704 | static ssize_t debug_output(struct file *file, char __user *user_buf, | |
705 | size_t len, loff_t *offset) | |
706 | { | |
707 | struct debug_buffer *buf = file->private_data; | |
708 | int ret = 0; | |
709 | ||
710 | mutex_lock(&buf->mutex); | |
711 | if (buf->count == 0) { | |
712 | ret = fill_buffer(buf); | |
713 | if (ret != 0) { | |
714 | mutex_unlock(&buf->mutex); | |
715 | goto out; | |
716 | } | |
717 | } | |
718 | mutex_unlock(&buf->mutex); | |
719 | ||
720 | ret = simple_read_from_buffer(user_buf, len, offset, | |
721 | buf->page, buf->count); | |
722 | ||
723 | out: | |
724 | return ret; | |
725 | ||
726 | } | |
727 | ||
728 | static int debug_close(struct inode *inode, struct file *file) | |
729 | { | |
730 | struct debug_buffer *buf = file->private_data; | |
731 | ||
732 | if (buf) { | |
733 | if (buf->page) | |
734 | free_page((unsigned long)buf->page); | |
735 | kfree(buf); | |
736 | } | |
737 | ||
738 | return 0; | |
739 | } | |
740 | static int debug_async_open(struct inode *inode, struct file *file) | |
741 | { | |
742 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); | |
743 | ||
744 | return file->private_data ? 0 : -ENOMEM; | |
745 | } | |
746 | ||
747 | static int debug_periodic_open(struct inode *inode, struct file *file) | |
748 | { | |
749 | file->private_data = alloc_buffer(inode->i_private, | |
750 | fill_periodic_buffer); | |
751 | ||
752 | return file->private_data ? 0 : -ENOMEM; | |
753 | } | |
754 | ||
755 | static int debug_registers_open(struct inode *inode, struct file *file) | |
756 | { | |
757 | file->private_data = alloc_buffer(inode->i_private, | |
758 | fill_registers_buffer); | |
759 | ||
760 | return file->private_data ? 0 : -ENOMEM; | |
761 | } | |
1da177e4 LT |
762 | static inline void create_debug_files (struct ohci_hcd *ohci) |
763 | { | |
684c19e0 | 764 | struct usb_bus *bus = &ohci_to_hcd(ohci)->self; |
63c4c0d8 | 765 | struct dentry *root; |
684c19e0 | 766 | |
63c4c0d8 GKH |
767 | root = debugfs_create_dir(bus->bus_name, ohci_debug_root); |
768 | ohci->debug_dir = root; | |
684c19e0 | 769 | |
63c4c0d8 GKH |
770 | debugfs_create_file("async", S_IRUGO, root, ohci, &debug_async_fops); |
771 | debugfs_create_file("periodic", S_IRUGO, root, ohci, | |
772 | &debug_periodic_fops); | |
773 | debugfs_create_file("registers", S_IRUGO, root, ohci, | |
774 | &debug_registers_fops); | |
1da177e4 | 775 | |
1da177e4 LT |
776 | ohci_dbg (ohci, "created debug files\n"); |
777 | } | |
778 | ||
779 | static inline void remove_debug_files (struct ohci_hcd *ohci) | |
780 | { | |
63c4c0d8 | 781 | debugfs_remove_recursive(ohci->debug_dir); |
1da177e4 LT |
782 | } |
783 | ||
1da177e4 LT |
784 | /*-------------------------------------------------------------------------*/ |
785 |