Commit | Line | Data |
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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 | ||
12 | #ifdef DEBUG | |
13 | ||
14 | #define edstring(ed_type) ({ char *temp; \ | |
15 | switch (ed_type) { \ | |
16 | case PIPE_CONTROL: temp = "ctrl"; break; \ | |
17 | case PIPE_BULK: temp = "bulk"; break; \ | |
18 | case PIPE_INTERRUPT: temp = "intr"; break; \ | |
dd9048af | 19 | default: temp = "isoc"; break; \ |
1da177e4 LT |
20 | }; temp;}) |
21 | #define pipestring(pipe) edstring(usb_pipetype(pipe)) | |
22 | ||
23 | /* debug| print the main components of an URB | |
24 | * small: 0) header + data packets 1) just header | |
25 | */ | |
8234509c | 26 | static void __maybe_unused |
55d84968 | 27 | urb_print(struct urb * urb, char * str, int small, int status) |
1da177e4 LT |
28 | { |
29 | unsigned int pipe= urb->pipe; | |
30 | ||
31 | if (!urb->dev || !urb->dev->bus) { | |
32 | dbg("%s URB: no dev", str); | |
33 | return; | |
34 | } | |
35 | ||
36 | #ifndef OHCI_VERBOSE_DEBUG | |
55d84968 | 37 | if (status != 0) |
1da177e4 LT |
38 | #endif |
39 | dbg("%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d stat=%d", | |
40 | str, | |
41 | urb, | |
42 | usb_pipedevice (pipe), | |
43 | usb_pipeendpoint (pipe), | |
44 | usb_pipeout (pipe)? "out" : "in", | |
45 | pipestring (pipe), | |
46 | urb->transfer_flags, | |
47 | urb->actual_length, | |
48 | urb->transfer_buffer_length, | |
55d84968 | 49 | status); |
1da177e4 LT |
50 | |
51 | #ifdef OHCI_VERBOSE_DEBUG | |
52 | if (!small) { | |
53 | int i, len; | |
54 | ||
55 | if (usb_pipecontrol (pipe)) { | |
f45ba776 | 56 | printk (KERN_DEBUG "%s: setup(8):", __FILE__); |
1da177e4 LT |
57 | for (i = 0; i < 8 ; i++) |
58 | printk (" %02x", ((__u8 *) urb->setup_packet) [i]); | |
59 | printk ("\n"); | |
60 | } | |
61 | if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) { | |
f45ba776 | 62 | printk (KERN_DEBUG "%s: data(%d/%d):", __FILE__, |
1da177e4 LT |
63 | urb->actual_length, |
64 | urb->transfer_buffer_length); | |
65 | len = usb_pipeout (pipe)? | |
66 | urb->transfer_buffer_length: urb->actual_length; | |
67 | for (i = 0; i < 16 && i < len; i++) | |
68 | printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]); | |
55d84968 | 69 | printk ("%s stat:%d\n", i < len? "...": "", status); |
1da177e4 LT |
70 | } |
71 | } | |
72 | #endif | |
73 | } | |
74 | ||
75 | #define ohci_dbg_sw(ohci, next, size, format, arg...) \ | |
76 | do { \ | |
bdd203a0 | 77 | if (next != NULL) { \ |
1da177e4 LT |
78 | unsigned s_len; \ |
79 | s_len = scnprintf (*next, *size, format, ## arg ); \ | |
80 | *size -= s_len; *next += s_len; \ | |
81 | } else \ | |
82 | ohci_dbg(ohci,format, ## arg ); \ | |
83 | } while (0); | |
84 | ||
85 | ||
86 | static void ohci_dump_intr_mask ( | |
87 | struct ohci_hcd *ohci, | |
88 | char *label, | |
89 | u32 mask, | |
90 | char **next, | |
91 | unsigned *size) | |
92 | { | |
93 | ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n", | |
94 | label, | |
95 | mask, | |
96 | (mask & OHCI_INTR_MIE) ? " MIE" : "", | |
97 | (mask & OHCI_INTR_OC) ? " OC" : "", | |
98 | (mask & OHCI_INTR_RHSC) ? " RHSC" : "", | |
99 | (mask & OHCI_INTR_FNO) ? " FNO" : "", | |
100 | (mask & OHCI_INTR_UE) ? " UE" : "", | |
101 | (mask & OHCI_INTR_RD) ? " RD" : "", | |
102 | (mask & OHCI_INTR_SF) ? " SF" : "", | |
103 | (mask & OHCI_INTR_WDH) ? " WDH" : "", | |
104 | (mask & OHCI_INTR_SO) ? " SO" : "" | |
105 | ); | |
106 | } | |
107 | ||
108 | static void maybe_print_eds ( | |
109 | struct ohci_hcd *ohci, | |
110 | char *label, | |
111 | u32 value, | |
112 | char **next, | |
113 | unsigned *size) | |
114 | { | |
115 | if (value) | |
116 | ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value); | |
117 | } | |
118 | ||
119 | static char *hcfs2string (int state) | |
120 | { | |
121 | switch (state) { | |
122 | case OHCI_USB_RESET: return "reset"; | |
123 | case OHCI_USB_RESUME: return "resume"; | |
124 | case OHCI_USB_OPER: return "operational"; | |
125 | case OHCI_USB_SUSPEND: return "suspend"; | |
126 | } | |
127 | return "?"; | |
128 | } | |
129 | ||
130 | // dump control and status registers | |
131 | static void | |
132 | ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size) | |
133 | { | |
134 | struct ohci_regs __iomem *regs = controller->regs; | |
135 | u32 temp; | |
136 | ||
137 | temp = ohci_readl (controller, ®s->revision) & 0xff; | |
138 | ohci_dbg_sw (controller, next, size, | |
139 | "OHCI %d.%d, %s legacy support registers\n", | |
140 | 0x03 & (temp >> 4), (temp & 0x0f), | |
141 | (temp & 0x0100) ? "with" : "NO"); | |
142 | ||
143 | temp = ohci_readl (controller, ®s->control); | |
144 | ohci_dbg_sw (controller, next, size, | |
145 | "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n", | |
146 | temp, | |
147 | (temp & OHCI_CTRL_RWE) ? " RWE" : "", | |
148 | (temp & OHCI_CTRL_RWC) ? " RWC" : "", | |
149 | (temp & OHCI_CTRL_IR) ? " IR" : "", | |
150 | hcfs2string (temp & OHCI_CTRL_HCFS), | |
151 | (temp & OHCI_CTRL_BLE) ? " BLE" : "", | |
152 | (temp & OHCI_CTRL_CLE) ? " CLE" : "", | |
153 | (temp & OHCI_CTRL_IE) ? " IE" : "", | |
154 | (temp & OHCI_CTRL_PLE) ? " PLE" : "", | |
155 | temp & OHCI_CTRL_CBSR | |
156 | ); | |
157 | ||
158 | temp = ohci_readl (controller, ®s->cmdstatus); | |
159 | ohci_dbg_sw (controller, next, size, | |
160 | "cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp, | |
161 | (temp & OHCI_SOC) >> 16, | |
162 | (temp & OHCI_OCR) ? " OCR" : "", | |
163 | (temp & OHCI_BLF) ? " BLF" : "", | |
164 | (temp & OHCI_CLF) ? " CLF" : "", | |
165 | (temp & OHCI_HCR) ? " HCR" : "" | |
166 | ); | |
167 | ||
168 | ohci_dump_intr_mask (controller, "intrstatus", | |
169 | ohci_readl (controller, ®s->intrstatus), | |
170 | next, size); | |
171 | ohci_dump_intr_mask (controller, "intrenable", | |
172 | ohci_readl (controller, ®s->intrenable), | |
173 | next, size); | |
174 | // intrdisable always same as intrenable | |
175 | ||
176 | maybe_print_eds (controller, "ed_periodcurrent", | |
177 | ohci_readl (controller, ®s->ed_periodcurrent), | |
178 | next, size); | |
179 | ||
180 | maybe_print_eds (controller, "ed_controlhead", | |
181 | ohci_readl (controller, ®s->ed_controlhead), | |
182 | next, size); | |
183 | maybe_print_eds (controller, "ed_controlcurrent", | |
184 | ohci_readl (controller, ®s->ed_controlcurrent), | |
185 | next, size); | |
186 | ||
187 | maybe_print_eds (controller, "ed_bulkhead", | |
188 | ohci_readl (controller, ®s->ed_bulkhead), | |
189 | next, size); | |
190 | maybe_print_eds (controller, "ed_bulkcurrent", | |
191 | ohci_readl (controller, ®s->ed_bulkcurrent), | |
192 | next, size); | |
193 | ||
194 | maybe_print_eds (controller, "donehead", | |
195 | ohci_readl (controller, ®s->donehead), next, size); | |
1da177e4 LT |
196 | } |
197 | ||
198 | #define dbg_port_sw(hc,num,value,next,size) \ | |
199 | ohci_dbg_sw (hc, next, size, \ | |
200 | "roothub.portstatus [%d] " \ | |
201 | "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ | |
202 | num, temp, \ | |
203 | (temp & RH_PS_PRSC) ? " PRSC" : "", \ | |
204 | (temp & RH_PS_OCIC) ? " OCIC" : "", \ | |
205 | (temp & RH_PS_PSSC) ? " PSSC" : "", \ | |
206 | (temp & RH_PS_PESC) ? " PESC" : "", \ | |
207 | (temp & RH_PS_CSC) ? " CSC" : "", \ | |
dd9048af | 208 | \ |
1da177e4 LT |
209 | (temp & RH_PS_LSDA) ? " LSDA" : "", \ |
210 | (temp & RH_PS_PPS) ? " PPS" : "", \ | |
211 | (temp & RH_PS_PRS) ? " PRS" : "", \ | |
212 | (temp & RH_PS_POCI) ? " POCI" : "", \ | |
213 | (temp & RH_PS_PSS) ? " PSS" : "", \ | |
dd9048af | 214 | \ |
1da177e4 LT |
215 | (temp & RH_PS_PES) ? " PES" : "", \ |
216 | (temp & RH_PS_CCS) ? " CCS" : "" \ | |
217 | ); | |
218 | ||
219 | ||
220 | static void | |
221 | ohci_dump_roothub ( | |
222 | struct ohci_hcd *controller, | |
223 | int verbose, | |
224 | char **next, | |
225 | unsigned *size) | |
226 | { | |
fdd13b36 | 227 | u32 temp, i; |
1da177e4 LT |
228 | |
229 | temp = roothub_a (controller); | |
230 | if (temp == ~(u32)0) | |
231 | return; | |
1da177e4 LT |
232 | |
233 | if (verbose) { | |
234 | ohci_dbg_sw (controller, next, size, | |
fdd13b36 | 235 | "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp, |
1da177e4 LT |
236 | ((temp & RH_A_POTPGT) >> 24) & 0xff, |
237 | (temp & RH_A_NOCP) ? " NOCP" : "", | |
238 | (temp & RH_A_OCPM) ? " OCPM" : "", | |
239 | (temp & RH_A_DT) ? " DT" : "", | |
240 | (temp & RH_A_NPS) ? " NPS" : "", | |
241 | (temp & RH_A_PSM) ? " PSM" : "", | |
fdd13b36 | 242 | (temp & RH_A_NDP), controller->num_ports |
1da177e4 LT |
243 | ); |
244 | temp = roothub_b (controller); | |
245 | ohci_dbg_sw (controller, next, size, | |
246 | "roothub.b %08x PPCM=%04x DR=%04x\n", | |
247 | temp, | |
248 | (temp & RH_B_PPCM) >> 16, | |
249 | (temp & RH_B_DR) | |
250 | ); | |
251 | temp = roothub_status (controller); | |
252 | ohci_dbg_sw (controller, next, size, | |
253 | "roothub.status %08x%s%s%s%s%s%s\n", | |
254 | temp, | |
255 | (temp & RH_HS_CRWE) ? " CRWE" : "", | |
256 | (temp & RH_HS_OCIC) ? " OCIC" : "", | |
257 | (temp & RH_HS_LPSC) ? " LPSC" : "", | |
258 | (temp & RH_HS_DRWE) ? " DRWE" : "", | |
259 | (temp & RH_HS_OCI) ? " OCI" : "", | |
260 | (temp & RH_HS_LPS) ? " LPS" : "" | |
261 | ); | |
262 | } | |
263 | ||
fdd13b36 | 264 | for (i = 0; i < controller->num_ports; i++) { |
1da177e4 LT |
265 | temp = roothub_portstatus (controller, i); |
266 | dbg_port_sw (controller, i, temp, next, size); | |
267 | } | |
268 | } | |
269 | ||
270 | static void ohci_dump (struct ohci_hcd *controller, int verbose) | |
271 | { | |
272 | ohci_dbg (controller, "OHCI controller state\n"); | |
273 | ||
274 | // dumps some of the state we know about | |
275 | ohci_dump_status (controller, NULL, NULL); | |
276 | if (controller->hcca) | |
277 | ohci_dbg (controller, | |
278 | "hcca frame #%04x\n", ohci_frame_no(controller)); | |
279 | ohci_dump_roothub (controller, 1, NULL, NULL); | |
280 | } | |
281 | ||
282 | static const char data0 [] = "DATA0"; | |
283 | static const char data1 [] = "DATA1"; | |
284 | ||
285 | static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label, | |
286 | const struct td *td) | |
287 | { | |
288 | u32 tmp = hc32_to_cpup (ohci, &td->hwINFO); | |
289 | ||
290 | ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n", | |
291 | label, td, | |
292 | (tmp & TD_DONE) ? " (DONE)" : "", | |
293 | td->urb, td->index, | |
294 | hc32_to_cpup (ohci, &td->hwNextTD)); | |
295 | if ((tmp & TD_ISO) == 0) { | |
296 | const char *toggle, *pid; | |
297 | u32 cbp, be; | |
298 | ||
299 | switch (tmp & TD_T) { | |
300 | case TD_T_DATA0: toggle = data0; break; | |
301 | case TD_T_DATA1: toggle = data1; break; | |
302 | case TD_T_TOGGLE: toggle = "(CARRY)"; break; | |
303 | default: toggle = "(?)"; break; | |
304 | } | |
305 | switch (tmp & TD_DP) { | |
306 | case TD_DP_SETUP: pid = "SETUP"; break; | |
307 | case TD_DP_IN: pid = "IN"; break; | |
308 | case TD_DP_OUT: pid = "OUT"; break; | |
309 | default: pid = "(bad pid)"; break; | |
310 | } | |
311 | ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp, | |
312 | TD_CC_GET(tmp), /* EC, */ toggle, | |
313 | (tmp & TD_DI) >> 21, pid, | |
314 | (tmp & TD_R) ? "R" : ""); | |
315 | cbp = hc32_to_cpup (ohci, &td->hwCBP); | |
316 | be = hc32_to_cpup (ohci, &td->hwBE); | |
317 | ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be, | |
318 | cbp ? (be + 1 - cbp) : 0); | |
319 | } else { | |
320 | unsigned i; | |
321 | ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp, | |
322 | TD_CC_GET(tmp), | |
323 | (tmp >> 24) & 0x07, | |
324 | (tmp & TD_DI) >> 21, | |
325 | tmp & 0x0000ffff); | |
326 | ohci_dbg (ohci, " bp0 %08x be %08x\n", | |
327 | hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff, | |
328 | hc32_to_cpup (ohci, &td->hwBE)); | |
329 | for (i = 0; i < MAXPSW; i++) { | |
330 | u16 psw = ohci_hwPSW (ohci, td, i); | |
331 | int cc = (psw >> 12) & 0x0f; | |
332 | ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i, | |
333 | psw, cc, | |
334 | (cc >= 0x0e) ? "OFFSET" : "SIZE", | |
335 | psw & 0x0fff); | |
336 | } | |
337 | } | |
338 | } | |
339 | ||
340 | /* caller MUST own hcd spinlock if verbose is set! */ | |
8234509c | 341 | static void __maybe_unused |
1da177e4 LT |
342 | ohci_dump_ed (const struct ohci_hcd *ohci, const char *label, |
343 | const struct ed *ed, int verbose) | |
344 | { | |
345 | u32 tmp = hc32_to_cpu (ohci, ed->hwINFO); | |
346 | char *type = ""; | |
347 | ||
348 | ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n", | |
349 | label, | |
350 | ed, ed->state, edstring (ed->type), | |
351 | hc32_to_cpup (ohci, &ed->hwNextED)); | |
352 | switch (tmp & (ED_IN|ED_OUT)) { | |
353 | case ED_OUT: type = "-OUT"; break; | |
354 | case ED_IN: type = "-IN"; break; | |
355 | /* else from TDs ... control */ | |
356 | } | |
357 | ohci_dbg (ohci, | |
358 | " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp, | |
359 | 0x03ff & (tmp >> 16), | |
360 | (tmp & ED_DEQUEUE) ? " DQ" : "", | |
361 | (tmp & ED_ISO) ? " ISO" : "", | |
362 | (tmp & ED_SKIP) ? " SKIP" : "", | |
363 | (tmp & ED_LOWSPEED) ? " LOW" : "", | |
364 | 0x000f & (tmp >> 7), | |
365 | type, | |
366 | 0x007f & tmp); | |
367 | tmp = hc32_to_cpup (ohci, &ed->hwHeadP); | |
368 | ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n", | |
369 | tmp, | |
370 | (tmp & ED_C) ? data1 : data0, | |
371 | (tmp & ED_H) ? " HALT" : "", | |
372 | hc32_to_cpup (ohci, &ed->hwTailP), | |
373 | verbose ? "" : " (not listing)"); | |
374 | if (verbose) { | |
375 | struct list_head *tmp; | |
376 | ||
377 | /* use ed->td_list because HC concurrently modifies | |
378 | * hwNextTD as it accumulates ed_donelist. | |
379 | */ | |
380 | list_for_each (tmp, &ed->td_list) { | |
381 | struct td *td; | |
382 | td = list_entry (tmp, struct td, td_list); | |
383 | ohci_dump_td (ohci, " ->", td); | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | #else | |
389 | static inline void ohci_dump (struct ohci_hcd *controller, int verbose) {} | |
390 | ||
391 | #undef OHCI_VERBOSE_DEBUG | |
392 | ||
393 | #endif /* DEBUG */ | |
394 | ||
395 | /*-------------------------------------------------------------------------*/ | |
396 | ||
397 | #ifdef STUB_DEBUG_FILES | |
398 | ||
399 | static inline void create_debug_files (struct ohci_hcd *bus) { } | |
400 | static inline void remove_debug_files (struct ohci_hcd *bus) { } | |
401 | ||
402 | #else | |
403 | ||
684c19e0 TJ |
404 | static int debug_async_open(struct inode *, struct file *); |
405 | static int debug_periodic_open(struct inode *, struct file *); | |
406 | static int debug_registers_open(struct inode *, struct file *); | |
407 | static int debug_async_open(struct inode *, struct file *); | |
408 | static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); | |
409 | static int debug_close(struct inode *, struct file *); | |
410 | ||
411 | static const struct file_operations debug_async_fops = { | |
412 | .owner = THIS_MODULE, | |
413 | .open = debug_async_open, | |
414 | .read = debug_output, | |
415 | .release = debug_close, | |
416 | }; | |
417 | static const struct file_operations debug_periodic_fops = { | |
418 | .owner = THIS_MODULE, | |
419 | .open = debug_periodic_open, | |
420 | .read = debug_output, | |
421 | .release = debug_close, | |
422 | }; | |
423 | static const struct file_operations debug_registers_fops = { | |
424 | .owner = THIS_MODULE, | |
425 | .open = debug_registers_open, | |
426 | .read = debug_output, | |
427 | .release = debug_close, | |
428 | }; | |
429 | ||
430 | static struct dentry *ohci_debug_root; | |
431 | ||
432 | struct debug_buffer { | |
433 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ | |
10983341 | 434 | struct ohci_hcd *ohci; |
684c19e0 TJ |
435 | struct mutex mutex; /* protect filling of buffer */ |
436 | size_t count; /* number of characters filled into buffer */ | |
437 | char *page; | |
438 | }; | |
439 | ||
1da177e4 LT |
440 | static ssize_t |
441 | show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed) | |
442 | { | |
443 | unsigned temp, size = count; | |
444 | ||
445 | if (!ed) | |
446 | return 0; | |
447 | ||
448 | /* print first --> last */ | |
449 | while (ed->ed_prev) | |
450 | ed = ed->ed_prev; | |
451 | ||
452 | /* dump a snapshot of the bulk or control schedule */ | |
453 | while (ed) { | |
454 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
455 | u32 headp = hc32_to_cpu (ohci, ed->hwHeadP); | |
456 | struct list_head *entry; | |
457 | struct td *td; | |
458 | ||
459 | temp = scnprintf (buf, size, | |
460 | "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s", | |
461 | ed, | |
462 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
463 | info & 0x7f, | |
464 | (info >> 7) & 0xf, | |
465 | (info & ED_IN) ? "in" : "out", | |
466 | 0x03ff & (info >> 16), | |
467 | info, | |
468 | (info & ED_SKIP) ? " s" : "", | |
469 | (headp & ED_H) ? " H" : "", | |
470 | (headp & ED_C) ? data1 : data0); | |
471 | size -= temp; | |
472 | buf += temp; | |
473 | ||
474 | list_for_each (entry, &ed->td_list) { | |
475 | u32 cbp, be; | |
476 | ||
477 | td = list_entry (entry, struct td, td_list); | |
478 | info = hc32_to_cpup (ohci, &td->hwINFO); | |
479 | cbp = hc32_to_cpup (ohci, &td->hwCBP); | |
480 | be = hc32_to_cpup (ohci, &td->hwBE); | |
481 | temp = scnprintf (buf, size, | |
482 | "\n\ttd %p %s %d cc=%x urb %p (%08x)", | |
483 | td, | |
484 | ({ char *pid; | |
485 | switch (info & TD_DP) { | |
486 | case TD_DP_SETUP: pid = "setup"; break; | |
487 | case TD_DP_IN: pid = "in"; break; | |
488 | case TD_DP_OUT: pid = "out"; break; | |
489 | default: pid = "(?)"; break; | |
490 | } pid;}), | |
491 | cbp ? (be + 1 - cbp) : 0, | |
492 | TD_CC_GET (info), td->urb, info); | |
493 | size -= temp; | |
494 | buf += temp; | |
495 | } | |
496 | ||
497 | temp = scnprintf (buf, size, "\n"); | |
498 | size -= temp; | |
499 | buf += temp; | |
500 | ||
501 | ed = ed->ed_next; | |
502 | } | |
503 | return count - size; | |
504 | } | |
505 | ||
684c19e0 | 506 | static ssize_t fill_async_buffer(struct debug_buffer *buf) |
1da177e4 | 507 | { |
1da177e4 LT |
508 | struct ohci_hcd *ohci; |
509 | size_t temp; | |
510 | unsigned long flags; | |
511 | ||
10983341 | 512 | ohci = buf->ohci; |
1da177e4 LT |
513 | |
514 | /* display control and bulk lists together, for simplicity */ | |
515 | spin_lock_irqsave (&ohci->lock, flags); | |
684c19e0 TJ |
516 | temp = show_list(ohci, buf->page, buf->count, ohci->ed_controltail); |
517 | temp += show_list(ohci, buf->page + temp, buf->count - temp, | |
518 | ohci->ed_bulktail); | |
1da177e4 LT |
519 | spin_unlock_irqrestore (&ohci->lock, flags); |
520 | ||
521 | return temp; | |
522 | } | |
1da177e4 LT |
523 | |
524 | #define DBG_SCHED_LIMIT 64 | |
525 | ||
684c19e0 | 526 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
1da177e4 | 527 | { |
1da177e4 LT |
528 | struct ohci_hcd *ohci; |
529 | struct ed **seen, *ed; | |
530 | unsigned long flags; | |
531 | unsigned temp, size, seen_count; | |
532 | char *next; | |
533 | unsigned i; | |
534 | ||
54e6ecb2 | 535 | if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) |
1da177e4 LT |
536 | return 0; |
537 | seen_count = 0; | |
538 | ||
10983341 | 539 | ohci = buf->ohci; |
684c19e0 | 540 | next = buf->page; |
1da177e4 LT |
541 | size = PAGE_SIZE; |
542 | ||
543 | temp = scnprintf (next, size, "size = %d\n", NUM_INTS); | |
544 | size -= temp; | |
545 | next += temp; | |
546 | ||
547 | /* dump a snapshot of the periodic schedule (and load) */ | |
548 | spin_lock_irqsave (&ohci->lock, flags); | |
549 | for (i = 0; i < NUM_INTS; i++) { | |
550 | if (!(ed = ohci->periodic [i])) | |
551 | continue; | |
552 | ||
553 | temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); | |
554 | size -= temp; | |
555 | next += temp; | |
556 | ||
557 | do { | |
558 | temp = scnprintf (next, size, " ed%d/%p", | |
559 | ed->interval, ed); | |
560 | size -= temp; | |
561 | next += temp; | |
562 | for (temp = 0; temp < seen_count; temp++) { | |
563 | if (seen [temp] == ed) | |
564 | break; | |
565 | } | |
566 | ||
567 | /* show more info the first time around */ | |
568 | if (temp == seen_count) { | |
569 | u32 info = hc32_to_cpu (ohci, ed->hwINFO); | |
570 | struct list_head *entry; | |
571 | unsigned qlen = 0; | |
572 | ||
573 | /* qlen measured here in TDs, not urbs */ | |
574 | list_for_each (entry, &ed->td_list) | |
575 | qlen++; | |
576 | ||
577 | temp = scnprintf (next, size, | |
578 | " (%cs dev%d ep%d%s-%s qlen %u" | |
579 | " max %d %08x%s%s)", | |
580 | (info & ED_LOWSPEED) ? 'l' : 'f', | |
581 | info & 0x7f, | |
582 | (info >> 7) & 0xf, | |
583 | (info & ED_IN) ? "in" : "out", | |
584 | (info & ED_ISO) ? "iso" : "int", | |
585 | qlen, | |
586 | 0x03ff & (info >> 16), | |
587 | info, | |
588 | (info & ED_SKIP) ? " K" : "", | |
589 | (ed->hwHeadP & | |
590 | cpu_to_hc32(ohci, ED_H)) ? | |
dd9048af | 591 | " H" : ""); |
1da177e4 LT |
592 | size -= temp; |
593 | next += temp; | |
594 | ||
595 | if (seen_count < DBG_SCHED_LIMIT) | |
596 | seen [seen_count++] = ed; | |
597 | ||
598 | ed = ed->ed_next; | |
599 | ||
600 | } else { | |
601 | /* we've seen it and what's after */ | |
602 | temp = 0; | |
603 | ed = NULL; | |
604 | } | |
605 | ||
606 | } while (ed); | |
607 | ||
608 | temp = scnprintf (next, size, "\n"); | |
609 | size -= temp; | |
610 | next += temp; | |
611 | } | |
612 | spin_unlock_irqrestore (&ohci->lock, flags); | |
613 | kfree (seen); | |
614 | ||
615 | return PAGE_SIZE - size; | |
616 | } | |
1da177e4 LT |
617 | #undef DBG_SCHED_LIMIT |
618 | ||
684c19e0 | 619 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
1da177e4 | 620 | { |
1da177e4 LT |
621 | struct usb_hcd *hcd; |
622 | struct ohci_hcd *ohci; | |
623 | struct ohci_regs __iomem *regs; | |
624 | unsigned long flags; | |
625 | unsigned temp, size; | |
626 | char *next; | |
627 | u32 rdata; | |
628 | ||
10983341 GKH |
629 | ohci = buf->ohci; |
630 | hcd = ohci_to_hcd(ohci); | |
1da177e4 | 631 | regs = ohci->regs; |
684c19e0 | 632 | next = buf->page; |
1da177e4 LT |
633 | size = PAGE_SIZE; |
634 | ||
635 | spin_lock_irqsave (&ohci->lock, flags); | |
636 | ||
637 | /* dump driver info, then registers in spec order */ | |
638 | ||
639 | ohci_dbg_sw (ohci, &next, &size, | |
640 | "bus %s, device %s\n" | |
641 | "%s\n" | |
2b70f073 | 642 | "%s\n", |
1da177e4 | 643 | hcd->self.controller->bus->name, |
7071a3ce | 644 | dev_name(hcd->self.controller), |
1da177e4 LT |
645 | hcd->product_desc, |
646 | hcd_name); | |
647 | ||
70a1c9e0 | 648 | if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
1da177e4 LT |
649 | size -= scnprintf (next, size, |
650 | "SUSPENDED (no register access)\n"); | |
651 | goto done; | |
652 | } | |
653 | ||
654 | ohci_dump_status(ohci, &next, &size); | |
655 | ||
656 | /* hcca */ | |
657 | if (ohci->hcca) | |
658 | ohci_dbg_sw (ohci, &next, &size, | |
659 | "hcca frame 0x%04x\n", ohci_frame_no(ohci)); | |
660 | ||
661 | /* other registers mostly affect frame timings */ | |
662 | rdata = ohci_readl (ohci, ®s->fminterval); | |
663 | temp = scnprintf (next, size, | |
664 | "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", | |
665 | rdata, (rdata >> 31) ? "FIT " : "", | |
666 | (rdata >> 16) & 0xefff, rdata & 0xffff); | |
667 | size -= temp; | |
668 | next += temp; | |
669 | ||
670 | rdata = ohci_readl (ohci, ®s->fmremaining); | |
671 | temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", | |
672 | rdata, (rdata >> 31) ? "FRT " : "", | |
673 | rdata & 0x3fff); | |
674 | size -= temp; | |
675 | next += temp; | |
676 | ||
677 | rdata = ohci_readl (ohci, ®s->periodicstart); | |
678 | temp = scnprintf (next, size, "periodicstart 0x%04x\n", | |
679 | rdata & 0x3fff); | |
680 | size -= temp; | |
681 | next += temp; | |
682 | ||
683 | rdata = ohci_readl (ohci, ®s->lsthresh); | |
684 | temp = scnprintf (next, size, "lsthresh 0x%04x\n", | |
685 | rdata & 0x3fff); | |
686 | size -= temp; | |
687 | next += temp; | |
688 | ||
d413984a DB |
689 | temp = scnprintf (next, size, "hub poll timer %s\n", |
690 | ohci_to_hcd(ohci)->poll_rh ? "ON" : "off"); | |
691 | size -= temp; | |
692 | next += temp; | |
693 | ||
1da177e4 LT |
694 | /* roothub */ |
695 | ohci_dump_roothub (ohci, 1, &next, &size); | |
696 | ||
697 | done: | |
698 | spin_unlock_irqrestore (&ohci->lock, flags); | |
684c19e0 | 699 | |
1da177e4 LT |
700 | return PAGE_SIZE - size; |
701 | } | |
1da177e4 | 702 | |
10983341 | 703 | static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci, |
684c19e0 TJ |
704 | ssize_t (*fill_func)(struct debug_buffer *)) |
705 | { | |
706 | struct debug_buffer *buf; | |
707 | ||
708 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
1da177e4 | 709 | |
684c19e0 | 710 | if (buf) { |
10983341 | 711 | buf->ohci = ohci; |
684c19e0 TJ |
712 | buf->fill_func = fill_func; |
713 | mutex_init(&buf->mutex); | |
714 | } | |
715 | ||
716 | return buf; | |
717 | } | |
718 | ||
719 | static int fill_buffer(struct debug_buffer *buf) | |
720 | { | |
721 | int ret = 0; | |
722 | ||
723 | if (!buf->page) | |
724 | buf->page = (char *)get_zeroed_page(GFP_KERNEL); | |
725 | ||
726 | if (!buf->page) { | |
727 | ret = -ENOMEM; | |
728 | goto out; | |
729 | } | |
730 | ||
731 | ret = buf->fill_func(buf); | |
732 | ||
733 | if (ret >= 0) { | |
734 | buf->count = ret; | |
735 | ret = 0; | |
736 | } | |
737 | ||
738 | out: | |
739 | return ret; | |
740 | } | |
741 | ||
742 | static ssize_t debug_output(struct file *file, char __user *user_buf, | |
743 | size_t len, loff_t *offset) | |
744 | { | |
745 | struct debug_buffer *buf = file->private_data; | |
746 | int ret = 0; | |
747 | ||
748 | mutex_lock(&buf->mutex); | |
749 | if (buf->count == 0) { | |
750 | ret = fill_buffer(buf); | |
751 | if (ret != 0) { | |
752 | mutex_unlock(&buf->mutex); | |
753 | goto out; | |
754 | } | |
755 | } | |
756 | mutex_unlock(&buf->mutex); | |
757 | ||
758 | ret = simple_read_from_buffer(user_buf, len, offset, | |
759 | buf->page, buf->count); | |
760 | ||
761 | out: | |
762 | return ret; | |
763 | ||
764 | } | |
765 | ||
766 | static int debug_close(struct inode *inode, struct file *file) | |
767 | { | |
768 | struct debug_buffer *buf = file->private_data; | |
769 | ||
770 | if (buf) { | |
771 | if (buf->page) | |
772 | free_page((unsigned long)buf->page); | |
773 | kfree(buf); | |
774 | } | |
775 | ||
776 | return 0; | |
777 | } | |
778 | static int debug_async_open(struct inode *inode, struct file *file) | |
779 | { | |
780 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); | |
781 | ||
782 | return file->private_data ? 0 : -ENOMEM; | |
783 | } | |
784 | ||
785 | static int debug_periodic_open(struct inode *inode, struct file *file) | |
786 | { | |
787 | file->private_data = alloc_buffer(inode->i_private, | |
788 | fill_periodic_buffer); | |
789 | ||
790 | return file->private_data ? 0 : -ENOMEM; | |
791 | } | |
792 | ||
793 | static int debug_registers_open(struct inode *inode, struct file *file) | |
794 | { | |
795 | file->private_data = alloc_buffer(inode->i_private, | |
796 | fill_registers_buffer); | |
797 | ||
798 | return file->private_data ? 0 : -ENOMEM; | |
799 | } | |
1da177e4 LT |
800 | static inline void create_debug_files (struct ohci_hcd *ohci) |
801 | { | |
684c19e0 | 802 | struct usb_bus *bus = &ohci_to_hcd(ohci)->self; |
684c19e0 TJ |
803 | |
804 | ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root); | |
805 | if (!ohci->debug_dir) | |
806 | goto dir_error; | |
807 | ||
808 | ohci->debug_async = debugfs_create_file("async", S_IRUGO, | |
10983341 | 809 | ohci->debug_dir, ohci, |
684c19e0 TJ |
810 | &debug_async_fops); |
811 | if (!ohci->debug_async) | |
812 | goto async_error; | |
813 | ||
814 | ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO, | |
10983341 | 815 | ohci->debug_dir, ohci, |
684c19e0 TJ |
816 | &debug_periodic_fops); |
817 | if (!ohci->debug_periodic) | |
818 | goto periodic_error; | |
819 | ||
820 | ohci->debug_registers = debugfs_create_file("registers", S_IRUGO, | |
10983341 | 821 | ohci->debug_dir, ohci, |
684c19e0 TJ |
822 | &debug_registers_fops); |
823 | if (!ohci->debug_registers) | |
824 | goto registers_error; | |
1da177e4 | 825 | |
1da177e4 | 826 | ohci_dbg (ohci, "created debug files\n"); |
684c19e0 TJ |
827 | return; |
828 | ||
829 | registers_error: | |
830 | debugfs_remove(ohci->debug_periodic); | |
831 | periodic_error: | |
832 | debugfs_remove(ohci->debug_async); | |
833 | async_error: | |
834 | debugfs_remove(ohci->debug_dir); | |
835 | dir_error: | |
836 | ohci->debug_periodic = NULL; | |
837 | ohci->debug_async = NULL; | |
838 | ohci->debug_dir = NULL; | |
1da177e4 LT |
839 | } |
840 | ||
841 | static inline void remove_debug_files (struct ohci_hcd *ohci) | |
842 | { | |
684c19e0 TJ |
843 | debugfs_remove(ohci->debug_registers); |
844 | debugfs_remove(ohci->debug_periodic); | |
845 | debugfs_remove(ohci->debug_async); | |
846 | debugfs_remove(ohci->debug_dir); | |
1da177e4 LT |
847 | } |
848 | ||
849 | #endif | |
850 | ||
851 | /*-------------------------------------------------------------------------*/ | |
852 |