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; \ 19 default: temp = "isoc"; break; \ 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 */ 26 static void __maybe_unused 27 urb_print(struct urb * urb, char * str, int small, int status) 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 37 if (status != 0) 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, 49 status); 50 51 #ifdef OHCI_VERBOSE_DEBUG 52 if (!small) { 53 int i, len; 54 55 if (usb_pipecontrol (pipe)) { 56 printk (KERN_DEBUG __FILE__ ": setup(8):"); 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) { 62 printk (KERN_DEBUG __FILE__ ": data(%d/%d):", 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]); 69 printk ("%s stat:%d\n", i < len? "...": "", status); 70 } 71 } 72 #endif 73 } 74 75 #define ohci_dbg_sw(ohci, next, size, format, arg...) \ 76 do { \ 77 if (next != NULL) { \ 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); 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" : "", \ 208 \ 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" : "", \ 214 \ 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 { 227 u32 temp, i; 228 229 temp = roothub_a (controller); 230 if (temp == ~(u32)0) 231 return; 232 233 if (verbose) { 234 ohci_dbg_sw (controller, next, size, 235 "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp, 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" : "", 242 (temp & RH_A_NDP), controller->num_ports 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 } 263 264 for (i = 0; i < controller->num_ports; i++) { 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! */ 341 static void __maybe_unused 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 403 404 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 */ 434 struct device *dev; 435 struct mutex mutex; /* protect filling of buffer */ 436 size_t count; /* number of characters filled into buffer */ 437 char *page; 438 }; 439 440 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 } 505 506 static ssize_t fill_async_buffer(struct debug_buffer *buf) 507 { 508 struct usb_bus *bus; 509 struct usb_hcd *hcd; 510 struct ohci_hcd *ohci; 511 size_t temp; 512 unsigned long flags; 513 514 bus = dev_get_drvdata(buf->dev); 515 hcd = bus_to_hcd(bus); 516 ohci = hcd_to_ohci(hcd); 517 518 /* display control and bulk lists together, for simplicity */ 519 spin_lock_irqsave (&ohci->lock, flags); 520 temp = show_list(ohci, buf->page, buf->count, ohci->ed_controltail); 521 temp += show_list(ohci, buf->page + temp, buf->count - temp, 522 ohci->ed_bulktail); 523 spin_unlock_irqrestore (&ohci->lock, flags); 524 525 return temp; 526 } 527 528 #define DBG_SCHED_LIMIT 64 529 530 static ssize_t fill_periodic_buffer(struct debug_buffer *buf) 531 { 532 struct usb_bus *bus; 533 struct usb_hcd *hcd; 534 struct ohci_hcd *ohci; 535 struct ed **seen, *ed; 536 unsigned long flags; 537 unsigned temp, size, seen_count; 538 char *next; 539 unsigned i; 540 541 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) 542 return 0; 543 seen_count = 0; 544 545 bus = (struct usb_bus *)dev_get_drvdata(buf->dev); 546 hcd = bus_to_hcd(bus); 547 ohci = hcd_to_ohci(hcd); 548 next = buf->page; 549 size = PAGE_SIZE; 550 551 temp = scnprintf (next, size, "size = %d\n", NUM_INTS); 552 size -= temp; 553 next += temp; 554 555 /* dump a snapshot of the periodic schedule (and load) */ 556 spin_lock_irqsave (&ohci->lock, flags); 557 for (i = 0; i < NUM_INTS; i++) { 558 if (!(ed = ohci->periodic [i])) 559 continue; 560 561 temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); 562 size -= temp; 563 next += temp; 564 565 do { 566 temp = scnprintf (next, size, " ed%d/%p", 567 ed->interval, ed); 568 size -= temp; 569 next += temp; 570 for (temp = 0; temp < seen_count; temp++) { 571 if (seen [temp] == ed) 572 break; 573 } 574 575 /* show more info the first time around */ 576 if (temp == seen_count) { 577 u32 info = hc32_to_cpu (ohci, ed->hwINFO); 578 struct list_head *entry; 579 unsigned qlen = 0; 580 581 /* qlen measured here in TDs, not urbs */ 582 list_for_each (entry, &ed->td_list) 583 qlen++; 584 585 temp = scnprintf (next, size, 586 " (%cs dev%d ep%d%s-%s qlen %u" 587 " max %d %08x%s%s)", 588 (info & ED_LOWSPEED) ? 'l' : 'f', 589 info & 0x7f, 590 (info >> 7) & 0xf, 591 (info & ED_IN) ? "in" : "out", 592 (info & ED_ISO) ? "iso" : "int", 593 qlen, 594 0x03ff & (info >> 16), 595 info, 596 (info & ED_SKIP) ? " K" : "", 597 (ed->hwHeadP & 598 cpu_to_hc32(ohci, ED_H)) ? 599 " H" : ""); 600 size -= temp; 601 next += temp; 602 603 if (seen_count < DBG_SCHED_LIMIT) 604 seen [seen_count++] = ed; 605 606 ed = ed->ed_next; 607 608 } else { 609 /* we've seen it and what's after */ 610 temp = 0; 611 ed = NULL; 612 } 613 614 } while (ed); 615 616 temp = scnprintf (next, size, "\n"); 617 size -= temp; 618 next += temp; 619 } 620 spin_unlock_irqrestore (&ohci->lock, flags); 621 kfree (seen); 622 623 return PAGE_SIZE - size; 624 } 625 #undef DBG_SCHED_LIMIT 626 627 static ssize_t fill_registers_buffer(struct debug_buffer *buf) 628 { 629 struct usb_bus *bus; 630 struct usb_hcd *hcd; 631 struct ohci_hcd *ohci; 632 struct ohci_regs __iomem *regs; 633 unsigned long flags; 634 unsigned temp, size; 635 char *next; 636 u32 rdata; 637 638 bus = (struct usb_bus *)dev_get_drvdata(buf->dev); 639 hcd = bus_to_hcd(bus); 640 ohci = hcd_to_ohci(hcd); 641 regs = ohci->regs; 642 next = buf->page; 643 size = PAGE_SIZE; 644 645 spin_lock_irqsave (&ohci->lock, flags); 646 647 /* dump driver info, then registers in spec order */ 648 649 ohci_dbg_sw (ohci, &next, &size, 650 "bus %s, device %s\n" 651 "%s\n" 652 "%s\n", 653 hcd->self.controller->bus->name, 654 dev_name(hcd->self.controller), 655 hcd->product_desc, 656 hcd_name); 657 658 if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { 659 size -= scnprintf (next, size, 660 "SUSPENDED (no register access)\n"); 661 goto done; 662 } 663 664 ohci_dump_status(ohci, &next, &size); 665 666 /* hcca */ 667 if (ohci->hcca) 668 ohci_dbg_sw (ohci, &next, &size, 669 "hcca frame 0x%04x\n", ohci_frame_no(ohci)); 670 671 /* other registers mostly affect frame timings */ 672 rdata = ohci_readl (ohci, ®s->fminterval); 673 temp = scnprintf (next, size, 674 "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", 675 rdata, (rdata >> 31) ? "FIT " : "", 676 (rdata >> 16) & 0xefff, rdata & 0xffff); 677 size -= temp; 678 next += temp; 679 680 rdata = ohci_readl (ohci, ®s->fmremaining); 681 temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", 682 rdata, (rdata >> 31) ? "FRT " : "", 683 rdata & 0x3fff); 684 size -= temp; 685 next += temp; 686 687 rdata = ohci_readl (ohci, ®s->periodicstart); 688 temp = scnprintf (next, size, "periodicstart 0x%04x\n", 689 rdata & 0x3fff); 690 size -= temp; 691 next += temp; 692 693 rdata = ohci_readl (ohci, ®s->lsthresh); 694 temp = scnprintf (next, size, "lsthresh 0x%04x\n", 695 rdata & 0x3fff); 696 size -= temp; 697 next += temp; 698 699 temp = scnprintf (next, size, "hub poll timer %s\n", 700 ohci_to_hcd(ohci)->poll_rh ? "ON" : "off"); 701 size -= temp; 702 next += temp; 703 704 /* roothub */ 705 ohci_dump_roothub (ohci, 1, &next, &size); 706 707 done: 708 spin_unlock_irqrestore (&ohci->lock, flags); 709 710 return PAGE_SIZE - size; 711 } 712 713 static struct debug_buffer *alloc_buffer(struct device *dev, 714 ssize_t (*fill_func)(struct debug_buffer *)) 715 { 716 struct debug_buffer *buf; 717 718 buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); 719 720 if (buf) { 721 buf->dev = dev; 722 buf->fill_func = fill_func; 723 mutex_init(&buf->mutex); 724 } 725 726 return buf; 727 } 728 729 static int fill_buffer(struct debug_buffer *buf) 730 { 731 int ret = 0; 732 733 if (!buf->page) 734 buf->page = (char *)get_zeroed_page(GFP_KERNEL); 735 736 if (!buf->page) { 737 ret = -ENOMEM; 738 goto out; 739 } 740 741 ret = buf->fill_func(buf); 742 743 if (ret >= 0) { 744 buf->count = ret; 745 ret = 0; 746 } 747 748 out: 749 return ret; 750 } 751 752 static ssize_t debug_output(struct file *file, char __user *user_buf, 753 size_t len, loff_t *offset) 754 { 755 struct debug_buffer *buf = file->private_data; 756 int ret = 0; 757 758 mutex_lock(&buf->mutex); 759 if (buf->count == 0) { 760 ret = fill_buffer(buf); 761 if (ret != 0) { 762 mutex_unlock(&buf->mutex); 763 goto out; 764 } 765 } 766 mutex_unlock(&buf->mutex); 767 768 ret = simple_read_from_buffer(user_buf, len, offset, 769 buf->page, buf->count); 770 771 out: 772 return ret; 773 774 } 775 776 static int debug_close(struct inode *inode, struct file *file) 777 { 778 struct debug_buffer *buf = file->private_data; 779 780 if (buf) { 781 if (buf->page) 782 free_page((unsigned long)buf->page); 783 kfree(buf); 784 } 785 786 return 0; 787 } 788 static int debug_async_open(struct inode *inode, struct file *file) 789 { 790 file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); 791 792 return file->private_data ? 0 : -ENOMEM; 793 } 794 795 static int debug_periodic_open(struct inode *inode, struct file *file) 796 { 797 file->private_data = alloc_buffer(inode->i_private, 798 fill_periodic_buffer); 799 800 return file->private_data ? 0 : -ENOMEM; 801 } 802 803 static int debug_registers_open(struct inode *inode, struct file *file) 804 { 805 file->private_data = alloc_buffer(inode->i_private, 806 fill_registers_buffer); 807 808 return file->private_data ? 0 : -ENOMEM; 809 } 810 static inline void create_debug_files (struct ohci_hcd *ohci) 811 { 812 struct usb_bus *bus = &ohci_to_hcd(ohci)->self; 813 struct device *dev = bus->dev; 814 815 ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root); 816 if (!ohci->debug_dir) 817 goto dir_error; 818 819 ohci->debug_async = debugfs_create_file("async", S_IRUGO, 820 ohci->debug_dir, dev, 821 &debug_async_fops); 822 if (!ohci->debug_async) 823 goto async_error; 824 825 ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO, 826 ohci->debug_dir, dev, 827 &debug_periodic_fops); 828 if (!ohci->debug_periodic) 829 goto periodic_error; 830 831 ohci->debug_registers = debugfs_create_file("registers", S_IRUGO, 832 ohci->debug_dir, dev, 833 &debug_registers_fops); 834 if (!ohci->debug_registers) 835 goto registers_error; 836 837 ohci_dbg (ohci, "created debug files\n"); 838 return; 839 840 registers_error: 841 debugfs_remove(ohci->debug_periodic); 842 periodic_error: 843 debugfs_remove(ohci->debug_async); 844 async_error: 845 debugfs_remove(ohci->debug_dir); 846 dir_error: 847 ohci->debug_periodic = NULL; 848 ohci->debug_async = NULL; 849 ohci->debug_dir = NULL; 850 } 851 852 static inline void remove_debug_files (struct ohci_hcd *ohci) 853 { 854 debugfs_remove(ohci->debug_registers); 855 debugfs_remove(ohci->debug_periodic); 856 debugfs_remove(ohci->debug_async); 857 debugfs_remove(ohci->debug_dir); 858 } 859 860 #endif 861 862 /*-------------------------------------------------------------------------*/ 863 864