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 __attribute__((unused)) 27 urb_print (struct urb * urb, char * str, int small) 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 (urb->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 urb->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? "...": "", urb->status); 70 } 71 } 72 #endif 73 } 74 75 #define ohci_dbg_sw(ohci, next, size, format, arg...) \ 76 do { \ 77 if (next) { \ 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 /* broken fminterval means traffic won't flow! */ 198 ohci_dbg (controller, "fminterval %08x\n", 199 ohci_readl (controller, ®s->fminterval)); 200 } 201 202 #define dbg_port_sw(hc,num,value,next,size) \ 203 ohci_dbg_sw (hc, next, size, \ 204 "roothub.portstatus [%d] " \ 205 "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ 206 num, temp, \ 207 (temp & RH_PS_PRSC) ? " PRSC" : "", \ 208 (temp & RH_PS_OCIC) ? " OCIC" : "", \ 209 (temp & RH_PS_PSSC) ? " PSSC" : "", \ 210 (temp & RH_PS_PESC) ? " PESC" : "", \ 211 (temp & RH_PS_CSC) ? " CSC" : "", \ 212 \ 213 (temp & RH_PS_LSDA) ? " LSDA" : "", \ 214 (temp & RH_PS_PPS) ? " PPS" : "", \ 215 (temp & RH_PS_PRS) ? " PRS" : "", \ 216 (temp & RH_PS_POCI) ? " POCI" : "", \ 217 (temp & RH_PS_PSS) ? " PSS" : "", \ 218 \ 219 (temp & RH_PS_PES) ? " PES" : "", \ 220 (temp & RH_PS_CCS) ? " CCS" : "" \ 221 ); 222 223 224 static void 225 ohci_dump_roothub ( 226 struct ohci_hcd *controller, 227 int verbose, 228 char **next, 229 unsigned *size) 230 { 231 u32 temp, ndp, i; 232 233 temp = roothub_a (controller); 234 if (temp == ~(u32)0) 235 return; 236 ndp = (temp & RH_A_NDP); 237 238 if (verbose) { 239 ohci_dbg_sw (controller, next, size, 240 "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d\n", temp, 241 ((temp & RH_A_POTPGT) >> 24) & 0xff, 242 (temp & RH_A_NOCP) ? " NOCP" : "", 243 (temp & RH_A_OCPM) ? " OCPM" : "", 244 (temp & RH_A_DT) ? " DT" : "", 245 (temp & RH_A_NPS) ? " NPS" : "", 246 (temp & RH_A_PSM) ? " PSM" : "", 247 ndp 248 ); 249 temp = roothub_b (controller); 250 ohci_dbg_sw (controller, next, size, 251 "roothub.b %08x PPCM=%04x DR=%04x\n", 252 temp, 253 (temp & RH_B_PPCM) >> 16, 254 (temp & RH_B_DR) 255 ); 256 temp = roothub_status (controller); 257 ohci_dbg_sw (controller, next, size, 258 "roothub.status %08x%s%s%s%s%s%s\n", 259 temp, 260 (temp & RH_HS_CRWE) ? " CRWE" : "", 261 (temp & RH_HS_OCIC) ? " OCIC" : "", 262 (temp & RH_HS_LPSC) ? " LPSC" : "", 263 (temp & RH_HS_DRWE) ? " DRWE" : "", 264 (temp & RH_HS_OCI) ? " OCI" : "", 265 (temp & RH_HS_LPS) ? " LPS" : "" 266 ); 267 } 268 269 for (i = 0; i < ndp; i++) { 270 temp = roothub_portstatus (controller, i); 271 dbg_port_sw (controller, i, temp, next, size); 272 } 273 } 274 275 static void ohci_dump (struct ohci_hcd *controller, int verbose) 276 { 277 ohci_dbg (controller, "OHCI controller state\n"); 278 279 // dumps some of the state we know about 280 ohci_dump_status (controller, NULL, NULL); 281 if (controller->hcca) 282 ohci_dbg (controller, 283 "hcca frame #%04x\n", ohci_frame_no(controller)); 284 ohci_dump_roothub (controller, 1, NULL, NULL); 285 } 286 287 static const char data0 [] = "DATA0"; 288 static const char data1 [] = "DATA1"; 289 290 static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label, 291 const struct td *td) 292 { 293 u32 tmp = hc32_to_cpup (ohci, &td->hwINFO); 294 295 ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n", 296 label, td, 297 (tmp & TD_DONE) ? " (DONE)" : "", 298 td->urb, td->index, 299 hc32_to_cpup (ohci, &td->hwNextTD)); 300 if ((tmp & TD_ISO) == 0) { 301 const char *toggle, *pid; 302 u32 cbp, be; 303 304 switch (tmp & TD_T) { 305 case TD_T_DATA0: toggle = data0; break; 306 case TD_T_DATA1: toggle = data1; break; 307 case TD_T_TOGGLE: toggle = "(CARRY)"; break; 308 default: toggle = "(?)"; break; 309 } 310 switch (tmp & TD_DP) { 311 case TD_DP_SETUP: pid = "SETUP"; break; 312 case TD_DP_IN: pid = "IN"; break; 313 case TD_DP_OUT: pid = "OUT"; break; 314 default: pid = "(bad pid)"; break; 315 } 316 ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp, 317 TD_CC_GET(tmp), /* EC, */ toggle, 318 (tmp & TD_DI) >> 21, pid, 319 (tmp & TD_R) ? "R" : ""); 320 cbp = hc32_to_cpup (ohci, &td->hwCBP); 321 be = hc32_to_cpup (ohci, &td->hwBE); 322 ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be, 323 cbp ? (be + 1 - cbp) : 0); 324 } else { 325 unsigned i; 326 ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp, 327 TD_CC_GET(tmp), 328 (tmp >> 24) & 0x07, 329 (tmp & TD_DI) >> 21, 330 tmp & 0x0000ffff); 331 ohci_dbg (ohci, " bp0 %08x be %08x\n", 332 hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff, 333 hc32_to_cpup (ohci, &td->hwBE)); 334 for (i = 0; i < MAXPSW; i++) { 335 u16 psw = ohci_hwPSW (ohci, td, i); 336 int cc = (psw >> 12) & 0x0f; 337 ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i, 338 psw, cc, 339 (cc >= 0x0e) ? "OFFSET" : "SIZE", 340 psw & 0x0fff); 341 } 342 } 343 } 344 345 /* caller MUST own hcd spinlock if verbose is set! */ 346 static void __attribute__((unused)) 347 ohci_dump_ed (const struct ohci_hcd *ohci, const char *label, 348 const struct ed *ed, int verbose) 349 { 350 u32 tmp = hc32_to_cpu (ohci, ed->hwINFO); 351 char *type = ""; 352 353 ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n", 354 label, 355 ed, ed->state, edstring (ed->type), 356 hc32_to_cpup (ohci, &ed->hwNextED)); 357 switch (tmp & (ED_IN|ED_OUT)) { 358 case ED_OUT: type = "-OUT"; break; 359 case ED_IN: type = "-IN"; break; 360 /* else from TDs ... control */ 361 } 362 ohci_dbg (ohci, 363 " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp, 364 0x03ff & (tmp >> 16), 365 (tmp & ED_DEQUEUE) ? " DQ" : "", 366 (tmp & ED_ISO) ? " ISO" : "", 367 (tmp & ED_SKIP) ? " SKIP" : "", 368 (tmp & ED_LOWSPEED) ? " LOW" : "", 369 0x000f & (tmp >> 7), 370 type, 371 0x007f & tmp); 372 tmp = hc32_to_cpup (ohci, &ed->hwHeadP); 373 ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n", 374 tmp, 375 (tmp & ED_C) ? data1 : data0, 376 (tmp & ED_H) ? " HALT" : "", 377 hc32_to_cpup (ohci, &ed->hwTailP), 378 verbose ? "" : " (not listing)"); 379 if (verbose) { 380 struct list_head *tmp; 381 382 /* use ed->td_list because HC concurrently modifies 383 * hwNextTD as it accumulates ed_donelist. 384 */ 385 list_for_each (tmp, &ed->td_list) { 386 struct td *td; 387 td = list_entry (tmp, struct td, td_list); 388 ohci_dump_td (ohci, " ->", td); 389 } 390 } 391 } 392 393 #else 394 static inline void ohci_dump (struct ohci_hcd *controller, int verbose) {} 395 396 #undef OHCI_VERBOSE_DEBUG 397 398 #endif /* DEBUG */ 399 400 /*-------------------------------------------------------------------------*/ 401 402 #ifdef STUB_DEBUG_FILES 403 404 static inline void create_debug_files (struct ohci_hcd *bus) { } 405 static inline void remove_debug_files (struct ohci_hcd *bus) { } 406 407 #else 408 409 static ssize_t 410 show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed) 411 { 412 unsigned temp, size = count; 413 414 if (!ed) 415 return 0; 416 417 /* print first --> last */ 418 while (ed->ed_prev) 419 ed = ed->ed_prev; 420 421 /* dump a snapshot of the bulk or control schedule */ 422 while (ed) { 423 u32 info = hc32_to_cpu (ohci, ed->hwINFO); 424 u32 headp = hc32_to_cpu (ohci, ed->hwHeadP); 425 struct list_head *entry; 426 struct td *td; 427 428 temp = scnprintf (buf, size, 429 "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s", 430 ed, 431 (info & ED_LOWSPEED) ? 'l' : 'f', 432 info & 0x7f, 433 (info >> 7) & 0xf, 434 (info & ED_IN) ? "in" : "out", 435 0x03ff & (info >> 16), 436 info, 437 (info & ED_SKIP) ? " s" : "", 438 (headp & ED_H) ? " H" : "", 439 (headp & ED_C) ? data1 : data0); 440 size -= temp; 441 buf += temp; 442 443 list_for_each (entry, &ed->td_list) { 444 u32 cbp, be; 445 446 td = list_entry (entry, struct td, td_list); 447 info = hc32_to_cpup (ohci, &td->hwINFO); 448 cbp = hc32_to_cpup (ohci, &td->hwCBP); 449 be = hc32_to_cpup (ohci, &td->hwBE); 450 temp = scnprintf (buf, size, 451 "\n\ttd %p %s %d cc=%x urb %p (%08x)", 452 td, 453 ({ char *pid; 454 switch (info & TD_DP) { 455 case TD_DP_SETUP: pid = "setup"; break; 456 case TD_DP_IN: pid = "in"; break; 457 case TD_DP_OUT: pid = "out"; break; 458 default: pid = "(?)"; break; 459 } pid;}), 460 cbp ? (be + 1 - cbp) : 0, 461 TD_CC_GET (info), td->urb, info); 462 size -= temp; 463 buf += temp; 464 } 465 466 temp = scnprintf (buf, size, "\n"); 467 size -= temp; 468 buf += temp; 469 470 ed = ed->ed_next; 471 } 472 return count - size; 473 } 474 475 static ssize_t 476 show_async (struct class_device *class_dev, char *buf) 477 { 478 struct usb_bus *bus; 479 struct usb_hcd *hcd; 480 struct ohci_hcd *ohci; 481 size_t temp; 482 unsigned long flags; 483 484 bus = to_usb_bus(class_dev); 485 hcd = bus->hcpriv; 486 ohci = hcd_to_ohci(hcd); 487 488 /* display control and bulk lists together, for simplicity */ 489 spin_lock_irqsave (&ohci->lock, flags); 490 temp = show_list (ohci, buf, PAGE_SIZE, ohci->ed_controltail); 491 temp += show_list (ohci, buf + temp, PAGE_SIZE - temp, ohci->ed_bulktail); 492 spin_unlock_irqrestore (&ohci->lock, flags); 493 494 return temp; 495 } 496 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL); 497 498 499 #define DBG_SCHED_LIMIT 64 500 501 static ssize_t 502 show_periodic (struct class_device *class_dev, char *buf) 503 { 504 struct usb_bus *bus; 505 struct usb_hcd *hcd; 506 struct ohci_hcd *ohci; 507 struct ed **seen, *ed; 508 unsigned long flags; 509 unsigned temp, size, seen_count; 510 char *next; 511 unsigned i; 512 513 if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, SLAB_ATOMIC))) 514 return 0; 515 seen_count = 0; 516 517 bus = to_usb_bus(class_dev); 518 hcd = bus->hcpriv; 519 ohci = hcd_to_ohci(hcd); 520 next = buf; 521 size = PAGE_SIZE; 522 523 temp = scnprintf (next, size, "size = %d\n", NUM_INTS); 524 size -= temp; 525 next += temp; 526 527 /* dump a snapshot of the periodic schedule (and load) */ 528 spin_lock_irqsave (&ohci->lock, flags); 529 for (i = 0; i < NUM_INTS; i++) { 530 if (!(ed = ohci->periodic [i])) 531 continue; 532 533 temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); 534 size -= temp; 535 next += temp; 536 537 do { 538 temp = scnprintf (next, size, " ed%d/%p", 539 ed->interval, ed); 540 size -= temp; 541 next += temp; 542 for (temp = 0; temp < seen_count; temp++) { 543 if (seen [temp] == ed) 544 break; 545 } 546 547 /* show more info the first time around */ 548 if (temp == seen_count) { 549 u32 info = hc32_to_cpu (ohci, ed->hwINFO); 550 struct list_head *entry; 551 unsigned qlen = 0; 552 553 /* qlen measured here in TDs, not urbs */ 554 list_for_each (entry, &ed->td_list) 555 qlen++; 556 557 temp = scnprintf (next, size, 558 " (%cs dev%d ep%d%s-%s qlen %u" 559 " max %d %08x%s%s)", 560 (info & ED_LOWSPEED) ? 'l' : 'f', 561 info & 0x7f, 562 (info >> 7) & 0xf, 563 (info & ED_IN) ? "in" : "out", 564 (info & ED_ISO) ? "iso" : "int", 565 qlen, 566 0x03ff & (info >> 16), 567 info, 568 (info & ED_SKIP) ? " K" : "", 569 (ed->hwHeadP & 570 cpu_to_hc32(ohci, ED_H)) ? 571 " H" : ""); 572 size -= temp; 573 next += temp; 574 575 if (seen_count < DBG_SCHED_LIMIT) 576 seen [seen_count++] = ed; 577 578 ed = ed->ed_next; 579 580 } else { 581 /* we've seen it and what's after */ 582 temp = 0; 583 ed = NULL; 584 } 585 586 } while (ed); 587 588 temp = scnprintf (next, size, "\n"); 589 size -= temp; 590 next += temp; 591 } 592 spin_unlock_irqrestore (&ohci->lock, flags); 593 kfree (seen); 594 595 return PAGE_SIZE - size; 596 } 597 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL); 598 599 600 #undef DBG_SCHED_LIMIT 601 602 static ssize_t 603 show_registers (struct class_device *class_dev, char *buf) 604 { 605 struct usb_bus *bus; 606 struct usb_hcd *hcd; 607 struct ohci_hcd *ohci; 608 struct ohci_regs __iomem *regs; 609 unsigned long flags; 610 unsigned temp, size; 611 char *next; 612 u32 rdata; 613 614 bus = to_usb_bus(class_dev); 615 hcd = bus->hcpriv; 616 ohci = hcd_to_ohci(hcd); 617 regs = ohci->regs; 618 next = buf; 619 size = PAGE_SIZE; 620 621 spin_lock_irqsave (&ohci->lock, flags); 622 623 /* dump driver info, then registers in spec order */ 624 625 ohci_dbg_sw (ohci, &next, &size, 626 "bus %s, device %s\n" 627 "%s\n" 628 "%s version " DRIVER_VERSION "\n", 629 hcd->self.controller->bus->name, 630 hcd->self.controller->bus_id, 631 hcd->product_desc, 632 hcd_name); 633 634 if (bus->controller->power.power_state) { 635 size -= scnprintf (next, size, 636 "SUSPENDED (no register access)\n"); 637 goto done; 638 } 639 640 ohci_dump_status(ohci, &next, &size); 641 642 /* hcca */ 643 if (ohci->hcca) 644 ohci_dbg_sw (ohci, &next, &size, 645 "hcca frame 0x%04x\n", ohci_frame_no(ohci)); 646 647 /* other registers mostly affect frame timings */ 648 rdata = ohci_readl (ohci, ®s->fminterval); 649 temp = scnprintf (next, size, 650 "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", 651 rdata, (rdata >> 31) ? "FIT " : "", 652 (rdata >> 16) & 0xefff, rdata & 0xffff); 653 size -= temp; 654 next += temp; 655 656 rdata = ohci_readl (ohci, ®s->fmremaining); 657 temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", 658 rdata, (rdata >> 31) ? "FRT " : "", 659 rdata & 0x3fff); 660 size -= temp; 661 next += temp; 662 663 rdata = ohci_readl (ohci, ®s->periodicstart); 664 temp = scnprintf (next, size, "periodicstart 0x%04x\n", 665 rdata & 0x3fff); 666 size -= temp; 667 next += temp; 668 669 rdata = ohci_readl (ohci, ®s->lsthresh); 670 temp = scnprintf (next, size, "lsthresh 0x%04x\n", 671 rdata & 0x3fff); 672 size -= temp; 673 next += temp; 674 675 /* roothub */ 676 ohci_dump_roothub (ohci, 1, &next, &size); 677 678 done: 679 spin_unlock_irqrestore (&ohci->lock, flags); 680 return PAGE_SIZE - size; 681 } 682 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL); 683 684 685 static inline void create_debug_files (struct ohci_hcd *ohci) 686 { 687 struct class_device *cldev = &ohci_to_hcd(ohci)->self.class_dev; 688 689 class_device_create_file(cldev, &class_device_attr_async); 690 class_device_create_file(cldev, &class_device_attr_periodic); 691 class_device_create_file(cldev, &class_device_attr_registers); 692 ohci_dbg (ohci, "created debug files\n"); 693 } 694 695 static inline void remove_debug_files (struct ohci_hcd *ohci) 696 { 697 struct class_device *cldev = &ohci_to_hcd(ohci)->self.class_dev; 698 699 class_device_remove_file(cldev, &class_device_attr_async); 700 class_device_remove_file(cldev, &class_device_attr_periodic); 701 class_device_remove_file(cldev, &class_device_attr_registers); 702 } 703 704 #endif 705 706 /*-------------------------------------------------------------------------*/ 707 708