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