target/linux/adm5120/files/drivers/usb/host/adm5120-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 static inline char *ed_typestring(int ed_type)
  13 {
  14         switch (ed_type) {
  15         case PIPE_CONTROL:
  16                 return "ctrl";
  17         case PIPE_BULK:
  18                 return "bulk";
  19         case PIPE_INTERRUPT:
  20                 return "intr";
  21         case PIPE_ISOCHRONOUS:
  22                 return "isoc";
  23         }
  24         return "(bad ed_type)";
  25 }
  26
  27 static inline char *ed_statestring(int state)
  28 {
  29         switch (state) {
  30         case ED_IDLE:
  31                 return "IDLE";
  32         case ED_UNLINK:
  33                 return "UNLINK";
  34         case ED_OPER:
  35                 return "OPER";
  36         case ED_NEW:
  37                 return "NEW";
  38         }
  39         return "?STATE";
  40 }
  41
  42 static inline char *pipestring(int pipe)
  43 {
  44         return ed_typestring(usb_pipetype(pipe));
  45 }
  46
  47 static inline char *td_pidstring(u32 info)
  48 {
  49         switch (info & TD_DP) {
  50         case TD_DP_SETUP:
  51                 return "SETUP";
  52         case TD_DP_IN:
  53                 return "IN";
  54         case TD_DP_OUT:
  55                 return "OUT";
  56         }
  57         return "?PID";
  58 }
  59
  60 static inline char *td_togglestring(u32 info)
  61 {
  62         switch (info & TD_T) {
  63         case TD_T_DATA0:
  64                 return "DATA0";
  65         case TD_T_DATA1:
  66                 return "DATA1";
  67         case TD_T_CARRY:
  68                 return "CARRY";
  69         }
  70         return "?TOGGLE";
  71 }
  72
  73 #ifdef DEBUG
  74
  75 /* debug| print the main components of an URB
  76  * small: 0) header + data packets 1) just header
  77  */
  78 static void __attribute__((unused))
  79 urb_print(struct admhcd *ahcd, struct urb * urb, char * str, int small)
  80 {
  81         unsigned int pipe = urb->pipe;
  82
  83         if (!urb->dev || !urb->dev->bus) {
  84                 admhc_dbg(ahcd, "%s URB: no dev", str);
  85                 return;
  86         }
  87
  88 #ifndef ADMHC_VERBOSE_DEBUG
  89         if (urb->status != 0)
  90 #endif
  91         admhc_dbg(ahcd, "URB-%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d "
  92                         "stat=%d\n",
  93                         str,
  94                         urb,
  95                         usb_pipedevice(pipe),
  96                         usb_pipeendpoint(pipe),
  97                         usb_pipeout(pipe)? "out" : "in",
  98                         pipestring(pipe),
  99                         urb->transfer_flags,
 100                         urb->actual_length,
 101                         urb->transfer_buffer_length,
 102                         urb->status);
 103
 104 #ifdef  ADMHC_VERBOSE_DEBUG
 105         if (!small) {
 106                 int i, len;
 107
 108                 if (usb_pipecontrol(pipe)) {
 109                         admhc_dbg(admhc, "setup(8): ");
 110                         for (i = 0; i < 8 ; i++)
 111                                 printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
 112                         printk ("\n");
 113                 }
 114                 if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
 115                         admhc_dbg(admhc, "data(%d/%d): ",
 116                                 urb->actual_length,
 117                                 urb->transfer_buffer_length);
 118                         len = usb_pipeout(pipe)?
 119                                                 urb->transfer_buffer_length: urb->actual_length;
 120                         for (i = 0; i < 16 && i < len; i++)
 121                                 printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
 122                         printk ("%s stat:%d\n", i < len? "...": "", urb->status);
 123                 }
 124         }
 125 #endif /* ADMHC_VERBOSE_DEBUG */
 126 }
 127
 128 #define admhc_dbg_sw(ahcd, next, size, format, arg...) \
 129         do { \
 130         if (next) { \
 131                 unsigned s_len; \
 132                 s_len = scnprintf(*next, *size, format, ## arg ); \
 133                 *size -= s_len; *next += s_len; \
 134         } else \
 135                 admhc_dbg(ahcd,format, ## arg ); \
 136         } while (0);
 137
 138
 139 static void admhc_dump_intr_mask(struct admhcd *ahcd, char *label, u32 mask,
 140                 char **next, unsigned *size)
 141 {
 142         admhc_dbg_sw(ahcd, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n",
 143                 label,
 144                 mask,
 145                 (mask & ADMHC_INTR_INTA) ? " INTA" : "",
 146                 (mask & ADMHC_INTR_FATI) ? " FATI" : "",
 147                 (mask & ADMHC_INTR_SWI) ? " SWI" : "",
 148                 (mask & ADMHC_INTR_TDC) ? " TDC" : "",
 149                 (mask & ADMHC_INTR_FNO) ? " FNO" : "",
 150                 (mask & ADMHC_INTR_SO) ? " SO" : "",
 151                 (mask & ADMHC_INTR_INSM) ? " INSM" : "",
 152                 (mask & ADMHC_INTR_BABI) ? " BABI" : "",
 153                 (mask & ADMHC_INTR_7) ? " !7!" : "",
 154                 (mask & ADMHC_INTR_6) ? " !6!" : "",
 155                 (mask & ADMHC_INTR_RESI) ? " RESI" : "",
 156                 (mask & ADMHC_INTR_SOFI) ? " SOFI" : ""
 157                 );
 158 }
 159
 160 static void maybe_print_eds(struct admhcd *ahcd, char *label, u32 value,
 161                 char **next, unsigned *size)
 162 {
 163         if (value)
 164                 admhc_dbg_sw(ahcd, next, size, "%s %08x\n", label, value);
 165 }
 166
 167 static char *buss2string (int state)
 168 {
 169         switch (state) {
 170         case ADMHC_BUSS_RESET:
 171                 return "reset";
 172         case ADMHC_BUSS_RESUME:
 173                 return "resume";
 174         case ADMHC_BUSS_OPER:
 175                 return "operational";
 176         case ADMHC_BUSS_SUSPEND:
 177                 return "suspend";
 178         }
 179         return "?state";
 180 }
 181
 182 static void
 183 admhc_dump_status(struct admhcd *ahcd, char **next, unsigned *size)
 184 {
 185         struct admhcd_regs __iomem *regs = ahcd->regs;
 186         u32                     temp;
 187
 188         temp = admhc_readl(ahcd, &regs->gencontrol);
 189         admhc_dbg_sw(ahcd, next, size,
 190                 "gencontrol 0x%08x%s%s%s%s\n",
 191                 temp,
 192                 (temp & ADMHC_CTRL_UHFE) ? " UHFE" : "",
 193                 (temp & ADMHC_CTRL_SIR) ? " SIR" : "",
 194                 (temp & ADMHC_CTRL_DMAA) ? " DMAA" : "",
 195                 (temp & ADMHC_CTRL_SR) ? " SR" : ""
 196                 );
 197
 198         temp = admhc_readl(ahcd, &regs->host_control);
 199         admhc_dbg_sw(ahcd, next, size,
 200                 "host_control 0x%08x BUSS=%s%s\n",
 201                 temp,
 202                 buss2string(temp & ADMHC_HC_BUSS),
 203                 (temp & ADMHC_HC_DMAE) ? " DMAE" : ""
 204                 );
 205
 206         admhc_dump_intr_mask(ahcd, "int_status",
 207                         admhc_readl(ahcd, &regs->int_status),
 208                         next, size);
 209         admhc_dump_intr_mask(ahcd, "int_enable",
 210                         admhc_readl(ahcd, &regs->int_enable),
 211                         next, size);
 212
 213         maybe_print_eds(ahcd, "hosthead",
 214                         admhc_readl(ahcd, &regs->hosthead), next, size);
 215 }
 216
 217 #define dbg_port_sw(hc,num,value,next,size) \
 218         admhc_dbg_sw(hc, next, size, \
 219                 "portstatus [%d] " \
 220                 "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
 221                 num, temp, \
 222                 (temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
 223                 (temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
 224                 (temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
 225                 (temp & ADMHC_PS_PESC) ? " PESC" : "", \
 226                 (temp & ADMHC_PS_CSC) ? " CSC" : "", \
 227                 \
 228                 (temp & ADMHC_PS_LSDA) ? " LSDA" : "", \
 229                 (temp & ADMHC_PS_PPS) ? " PPS" : "", \
 230                 (temp & ADMHC_PS_PRS) ? " PRS" : "", \
 231                 (temp & ADMHC_PS_POCI) ? " POCI" : "", \
 232                 (temp & ADMHC_PS_PSS) ? " PSS" : "", \
 233                 \
 234                 (temp & ADMHC_PS_PES) ? " PES" : "", \
 235                 (temp & ADMHC_PS_CCS) ? " CCS" : "" \
 236                 );
 237
 238
 239 static void
 240 admhc_dump_roothub(
 241         struct admhcd *ahcd,
 242         int verbose,
 243         char **next,
 244         unsigned *size)
 245 {
 246         u32                     temp, i;
 247
 248         temp = admhc_read_rhdesc(ahcd);
 249         if (temp == ~(u32)0)
 250                 return;
 251
 252         if (verbose) {
 253                 admhc_dbg_sw(ahcd, next, size,
 254                         "rhdesc %08x%s%s%s%s%s%s PPCM=%02x%s%s%s%s NUMP=%d(%d)\n",
 255                         temp,
 256                         (temp & ADMHC_RH_CRWE) ? " CRWE" : "",
 257                         (temp & ADMHC_RH_OCIC) ? " OCIC" : "",
 258                         (temp & ADMHC_RH_LPSC) ? " LPSC" : "",
 259                         (temp & ADMHC_RH_LPSC) ? " DRWE" : "",
 260                         (temp & ADMHC_RH_LPSC) ? " OCI" : "",
 261                         (temp & ADMHC_RH_LPSC) ? " LPS" : "",
 262                         ((temp & ADMHC_RH_PPCM) >> 16),
 263                         (temp & ADMHC_RH_NOCP) ? " NOCP" : "",
 264                         (temp & ADMHC_RH_OCPM) ? " OCPM" : "",
 265                         (temp & ADMHC_RH_NPS) ? " NPS" : "",
 266                         (temp & ADMHC_RH_PSM) ? " PSM" : "",
 267                         (temp & ADMHC_RH_NUMP), ahcd->num_ports
 268                         );
 269         }
 270
 271         for (i = 0; i < ahcd->num_ports; i++) {
 272                 temp = admhc_read_portstatus(ahcd, i);
 273                 dbg_port_sw(ahcd, i, temp, next, size);
 274         }
 275 }
 276
 277 static void admhc_dump(struct admhcd *ahcd, int verbose)
 278 {
 279         admhc_dbg(ahcd, "ADMHC ahcd state\n");
 280
 281         /* dumps some of the state we know about */
 282         admhc_dump_status(ahcd, NULL, NULL);
 283         admhc_dbg(ahcd,"current frame #%04x\n",
 284                 admhc_frame_no(ahcd));
 285
 286         admhc_dump_roothub(ahcd, verbose, NULL, NULL);
 287 }
 288
 289 static const char data0[] = "DATA0";
 290 static const char data1[] = "DATA1";
 291
 292 static void admhc_dump_td(const struct admhcd *ahcd, const char *label,
 293                 const struct td *td)
 294 {
 295         u32     tmp;
 296
 297         admhc_dbg(ahcd, "%s td %p; urb %p index %d; hwNextTD %08x\n",
 298                 label, td,
 299                 td->urb, td->index,
 300                 hc32_to_cpup(ahcd, &td->hwNextTD));
 301
 302         tmp = hc32_to_cpup(ahcd, &td->hwINFO);
 303         admhc_dbg(ahcd, "     status %08x%s CC=%x EC=%d %s %s ISI=%x FN=%x\n",
 304                 tmp,
 305                 (tmp & TD_OWN) ? " OWN" : "",
 306                 TD_CC_GET(tmp),
 307                 TD_EC_GET(tmp),
 308                 td_togglestring(tmp),
 309                 td_pidstring(tmp),
 310                 TD_ISI_GET(tmp),
 311                 TD_FN_GET(tmp));
 312
 313         tmp = hc32_to_cpup(ahcd, &td->hwCBL);
 314         admhc_dbg(ahcd, "     dbp %08x; cbl %08x; LEN=%d%s\n",
 315                 hc32_to_cpup(ahcd, &td->hwDBP),
 316                 tmp,
 317                 TD_BL_GET(tmp),
 318                 (tmp & TD_IE) ? " IE" : "");
 319 }
 320
 321 static void admhc_dump_up(const struct admhcd *ahcd, const char *label,
 322                 const struct urb_priv *up)
 323 {
 324         int i;
 325
 326         admhc_dbg(ahcd, "%s urb/%p:\n", label, up->urb);
 327         for (i = 0; i < up->td_cnt; i++) {
 328                 struct td *td = up->td[i];
 329                 admhc_dump_td(ahcd, "    ->", td);
 330         }
 331 }
 332
 333 /* caller MUST own hcd spinlock if verbose is set! */
 334 static void __attribute__((unused))
 335 admhc_dump_ed(const struct admhcd *ahcd, const char *label,
 336                 const struct ed *ed, int verbose)
 337 {
 338         u32 tmp = hc32_to_cpu(ahcd, ed->hwINFO);
 339
 340         admhc_dbg(ahcd, "%s ed %p %s type %s; next ed %08x\n",
 341                 label,
 342                 ed, ed_statestring(ed->state), ed_typestring(ed->type),
 343                 hc32_to_cpup(ahcd, &ed->hwNextED));
 344
 345         admhc_dbg(ahcd, "  info %08x MAX=%d%s%s%s%s EP=%d DEV=%d\n", tmp,
 346                 ED_MPS_GET(tmp),
 347                 (tmp & ED_ISO) ? " ISO" : "",
 348                 (tmp & ED_SKIP) ? " SKIP" : "",
 349                 (tmp & ED_SPEED_FULL) ? " FULL" : " LOW",
 350                 (tmp & ED_INT) ? " INT" : "",
 351                 ED_EN_GET(tmp),
 352                 ED_FA_GET(tmp));
 353
 354         tmp = hc32_to_cpup(ahcd, &ed->hwHeadP);
 355         admhc_dbg(ahcd, "  tds: head %08x tail %08x %s%s\n",
 356                 tmp & TD_MASK,
 357                 hc32_to_cpup(ahcd, &ed->hwTailP),
 358                 (tmp & ED_C) ? data1 : data0,
 359                 (tmp & ED_H) ? " HALT" : "");
 360
 361         if (ed->urb_active)
 362                 admhc_dump_up(ahcd, "  active ", ed->urb_active);
 363
 364         if ((verbose) && (!list_empty(&ed->urb_pending))) {
 365                 struct list_head *entry;
 366                 /* dump pending URBs */
 367                 list_for_each(entry, &ed->urb_pending) {
 368                         struct urb_priv *up;
 369                         up = list_entry(entry, struct urb_priv, pending);
 370                         admhc_dump_up(ahcd, "  pending ", up);
 371                 }
 372         }
 373 }
 374
 375 #else /* ifdef DEBUG */
 376
 377 static inline void urb_print(struct urb * urb, char * str, int small) {}
 378 static inline void admhc_dump_up(const struct admhcd *ahcd, const char *label,
 379         const struct urb_priv *up) {}
 380 static inline void admhc_dump_ed(const struct admhcd *ahcd, const char *label,
 381         const struct ed *ed, int verbose) {}
 382 static inline void admhc_dump_td(const struct admhcd *ahcd, const char *label,
 383         const struct td *td) {}
 384 static inline void admhc_dump(struct admhcd *ahcd, int verbose) {}
 385
 386 #undef ADMHC_VERBOSE_DEBUG
 387
 388 #endif /* DEBUG */
 389
 390 /*-------------------------------------------------------------------------*/
 391
 392 #ifdef STUB_DEBUG_FILES
 393
 394 static inline void create_debug_files(struct admhcd *bus) { }
 395 static inline void remove_debug_files(struct admhcd *bus) { }
 396
 397 #else
 398
 399 static ssize_t
 400 show_urb_priv(struct admhcd *ahcd, char *buf, size_t count,
 401                 struct urb_priv *up)
 402 {
 403         unsigned temp, size = count;
 404         int i;
 405
 406         if (!up)
 407                 return 0;
 408
 409         temp = scnprintf(buf, size,"\n\turb %p ", up->urb);
 410         size -= temp;
 411         buf += temp;
 412
 413         for (i = 0; i< up->td_cnt; i++) {
 414                 struct td *td;
 415                 u32 dbp, cbl, info;
 416
 417                 td = up->td[i];
 418                 info = hc32_to_cpup(ahcd, &td->hwINFO);
 419                 dbp = hc32_to_cpup(ahcd, &td->hwDBP);
 420                 cbl = hc32_to_cpup(ahcd, &td->hwCBL);
 421
 422                 temp = scnprintf(buf, size,
 423                         "\n\t\ttd %p %s %d %s%scc=%x (%08x,%08x)",
 424                         td,
 425                         td_pidstring(info),
 426                         TD_BL_GET(cbl),
 427                         (info & TD_OWN) ? "WORK " : "DONE ",
 428                         (cbl & TD_IE) ? "IE " : "",
 429                         TD_CC_GET(info), info, cbl);
 430                 size -= temp;
 431                 buf += temp;
 432         }
 433
 434         return count - size;
 435 }
 436
 437 static ssize_t
 438 show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
 439 {
 440         unsigned                temp, size = count;
 441
 442         if (!ed)
 443                 return 0;
 444
 445         /* dump a snapshot of the bulk or control schedule */
 446         while (ed) {
 447                 u32 info = hc32_to_cpu(ahcd, ed->hwINFO);
 448                 u32 headp = hc32_to_cpu(ahcd, ed->hwHeadP);
 449
 450                 temp = scnprintf(buf, size,
 451                         "ed/%p %s %cs dev%d ep%d %s%smax %d %08x%s%s %s",
 452                         ed,
 453                         ed_typestring (ed->type),
 454                         (info & ED_SPEED_FULL) ? 'f' : 'l',
 455                         info & ED_FA_MASK,
 456                         (info >> ED_EN_SHIFT) & ED_EN_MASK,
 457                         (info & ED_INT) ? "INT " : "",
 458                         (info & ED_ISO) ? "ISO " : "",
 459                         (info >> ED_MPS_SHIFT) & ED_MPS_MASK ,
 460                         info,
 461                         (info & ED_SKIP) ? " S" : "",
 462                         (headp & ED_H) ? " H" : "",
 463                         (headp & ED_C) ? "DATA1" : "DATA0");
 464                 size -= temp;
 465                 buf += temp;
 466
 467                 if (ed->urb_active) {
 468                         temp = scnprintf(buf, size, "\nactive urb:");
 469                         size -= temp;
 470                         buf += temp;
 471
 472                         temp = show_urb_priv(ahcd, buf, size, ed->urb_active);
 473                         size -= temp;
 474                         buf += temp;
 475                 }
 476
 477                 if (!list_empty(&ed->urb_pending)) {
 478                         struct list_head *entry;
 479
 480                         temp = scnprintf(buf, size, "\npending urbs:");
 481                         size -= temp;
 482                         buf += temp;
 483
 484                         list_for_each(entry, &ed->urb_pending) {
 485                                 struct urb_priv *up;
 486                                 up = list_entry(entry, struct urb_priv,
 487                                         pending);
 488
 489                                 temp = show_urb_priv(ahcd, buf, size, up);
 490                                 size -= temp;
 491                                 buf += temp;
 492                         }
 493                 }
 494
 495                 temp = scnprintf(buf, size, "\n");
 496                 size -= temp;
 497                 buf += temp;
 498
 499                 ed = ed->ed_next;
 500         }
 501
 502         return count - size;
 503 }
 504
 505 static ssize_t
 506 show_async(struct class_device *class_dev, char *buf)
 507 {
 508         struct usb_bus          *bus;
 509         struct usb_hcd          *hcd;
 510         struct admhcd           *ahcd;
 511         size_t                  temp;
 512         unsigned long           flags;
 513
 514         bus = class_get_devdata(class_dev);
 515         hcd = bus_to_hcd(bus);
 516         ahcd = hcd_to_admhcd(hcd);
 517
 518         /* display control and bulk lists together, for simplicity */
 519         spin_lock_irqsave(&ahcd->lock, flags);
 520         temp = show_list(ahcd, buf, PAGE_SIZE, ahcd->ed_head);
 521         spin_unlock_irqrestore(&ahcd->lock, flags);
 522
 523         return temp;
 524 }
 525 static CLASS_DEVICE_ATTR(async, S_IRUGO, show_async, NULL);
 526
 527 static ssize_t
 528 show_registers(struct class_device *class_dev, char *buf)
 529 {
 530         struct usb_bus          *bus;
 531         struct usb_hcd          *hcd;
 532         struct admhcd           *ahcd;
 533         struct admhcd_regs __iomem *regs;
 534         unsigned long           flags;
 535         unsigned                temp, size;
 536         char                    *next;
 537         u32                     rdata;
 538
 539         bus = class_get_devdata(class_dev);
 540         hcd = bus_to_hcd(bus);
 541         ahcd = hcd_to_admhcd(hcd);
 542         regs = ahcd->regs;
 543         next = buf;
 544         size = PAGE_SIZE;
 545
 546         spin_lock_irqsave(&ahcd->lock, flags);
 547
 548         /* dump driver info, then registers in spec order */
 549
 550         admhc_dbg_sw(ahcd, &next, &size,
 551                 "bus %s, device %s\n"
 552                 "%s\n"
 553                 "%s version " DRIVER_VERSION "\n",
 554                 hcd->self.controller->bus->name,
 555                 hcd->self.controller->bus_id,
 556                 hcd->product_desc,
 557                 hcd_name);
 558
 559         if (bus->controller->power.power_state.event) {
 560                 size -= scnprintf(next, size,
 561                         "SUSPENDED (no register access)\n");
 562                 goto done;
 563         }
 564
 565         admhc_dump_status(ahcd, &next, &size);
 566
 567         /* other registers mostly affect frame timings */
 568         rdata = admhc_readl(ahcd, &regs->fminterval);
 569         temp = scnprintf(next, size,
 570                         "fmintvl 0x%08x %sFSLDP=0x%04x FI=0x%04x\n",
 571                         rdata, (rdata & ADMHC_SFI_FIT) ? "FIT " : "",
 572                         (rdata >> ADMHC_SFI_FSLDP_SHIFT) & ADMHC_SFI_FSLDP_MASK,
 573                         rdata  & ADMHC_SFI_FI_MASK);
 574         size -= temp;
 575         next += temp;
 576
 577         rdata = admhc_readl(ahcd, &regs->fmnumber);
 578         temp = scnprintf(next, size, "fmnumber 0x%08x %sFR=0x%04x FN=%04x\n",
 579                         rdata, (rdata & ADMHC_SFN_FRT) ? "FRT " : "",
 580                         (rdata >> ADMHC_SFN_FR_SHIFT) & ADMHC_SFN_FR_MASK,
 581                         rdata  & ADMHC_SFN_FN_MASK);
 582         size -= temp;
 583         next += temp;
 584
 585         /* TODO: use predefined bitmask */
 586         rdata = admhc_readl(ahcd, &regs->lsthresh);
 587         temp = scnprintf(next, size, "lsthresh 0x%04x\n",
 588                         rdata & 0x3fff);
 589         size -= temp;
 590         next += temp;
 591
 592         temp = scnprintf(next, size, "hub poll timer: %s\n",
 593                         admhcd_to_hcd(ahcd)->poll_rh ? "ON" : "OFF");
 594         size -= temp;
 595         next += temp;
 596
 597         /* roothub */
 598         admhc_dump_roothub(ahcd, 1, &next, &size);
 599
 600 done:
 601         spin_unlock_irqrestore(&ahcd->lock, flags);
 602         return PAGE_SIZE - size;
 603 }
 604 static CLASS_DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL);
 605
 606
 607 static inline void create_debug_files (struct admhcd *ahcd)
 608 {
 609         struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
 610         int retval;
 611
 612         retval = class_device_create_file(cldev, &class_device_attr_async);
 613         retval = class_device_create_file(cldev, &class_device_attr_registers);
 614         admhc_dbg(ahcd, "created debug files\n");
 615 }
 616
 617 static inline void remove_debug_files (struct admhcd *ahcd)
 618 {
 619         struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
 620
 621         class_device_remove_file(cldev, &class_device_attr_async);
 622         class_device_remove_file(cldev, &class_device_attr_registers);
 623 }
 624
 625 #endif
 626
 627 /*-------------------------------------------------------------------------*/
 628