drivers/usb/host/ohci-dbg.c

   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, &regs->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, &regs->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, &regs->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, &regs->intrstatus),
 170                         next, size);
 171         ohci_dump_intr_mask (controller, "intrenable",
 172                         ohci_readl (controller, &regs->intrenable),
 173                         next, size);
 174         // intrdisable always same as intrenable
 175
 176         maybe_print_eds (controller, "ed_periodcurrent",
 177                         ohci_readl (controller, &regs->ed_periodcurrent),
 178                         next, size);
 179
 180         maybe_print_eds (controller, "ed_controlhead",
 181                         ohci_readl (controller, &regs->ed_controlhead),
 182                         next, size);
 183         maybe_print_eds (controller, "ed_controlcurrent",
 184                         ohci_readl (controller, &regs->ed_controlcurrent),
 185                         next, size);
 186
 187         maybe_print_eds (controller, "ed_bulkhead",
 188                         ohci_readl (controller, &regs->ed_bulkhead),
 189                         next, size);
 190         maybe_print_eds (controller, "ed_bulkcurrent",
 191                         ohci_readl (controller, &regs->ed_bulkcurrent),
 192                         next, size);
 193
 194         maybe_print_eds (controller, "donehead",
 195                         ohci_readl (controller, &regs->donehead), next, size);
 196
 197         /* broken fminterval means traffic won't flow! */
 198         ohci_dbg (controller, "fminterval %08x\n",
 199                         ohci_readl (controller, &regs->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 = class_get_devdata(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 = class_get_devdata(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 = class_get_devdata(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.event) {
 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, &regs->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, &regs->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, &regs->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, &regs->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