git.oblomov.eu Git - linux-2.6/blob - drivers/usb/host/ehci-dbg.c

   1 /*
   2  * Copyright (c) 2001-2002 by David Brownell
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or (at your
   7  * option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software Foundation,
  16  * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17  */
  18
  19 /* this file is part of ehci-hcd.c */
  20
  21 #define ehci_dbg(ehci, fmt, args...) \
  22         dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
  23 #define ehci_err(ehci, fmt, args...) \
  24         dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
  25 #define ehci_info(ehci, fmt, args...) \
  26         dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
  27 #define ehci_warn(ehci, fmt, args...) \
  28         dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args )
  29
  30 #ifdef EHCI_VERBOSE_DEBUG
  31 #       define vdbg dbg
  32 #       define ehci_vdbg ehci_dbg
  33 #else
  34 #       define vdbg(fmt,args...) do { } while (0)
  35 #       define ehci_vdbg(ehci, fmt, args...) do { } while (0)
  36 #endif
  37
  38 #ifdef  DEBUG
  39
  40 /* check the values in the HCSPARAMS register
  41  * (host controller _Structural_ parameters)
  42  * see EHCI spec, Table 2-4 for each value
  43  */
  44 static void dbg_hcs_params (struct ehci_hcd *ehci, char *label)
  45 {
  46         u32     params = ehci_readl(ehci, &ehci->caps->hcs_params);
  47
  48         ehci_dbg (ehci,
  49                 "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n",
  50                 label, params,
  51                 HCS_DEBUG_PORT (params),
  52                 HCS_INDICATOR (params) ? " ind" : "",
  53                 HCS_N_CC (params),
  54                 HCS_N_PCC (params),
  55                 HCS_PORTROUTED (params) ? "" : " ordered",
  56                 HCS_PPC (params) ? "" : " !ppc",
  57                 HCS_N_PORTS (params)
  58                 );
  59         /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */
  60         if (HCS_PORTROUTED (params)) {
  61                 int i;
  62                 char buf [46], tmp [7], byte;
  63
  64                 buf[0] = 0;
  65                 for (i = 0; i < HCS_N_PORTS (params); i++) {
  66                         // FIXME MIPS won't readb() ...
  67                         byte = readb (&ehci->caps->portroute[(i>>1)]);
  68                         sprintf(tmp, "%d ",
  69                                 ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf)));
  70                         strcat(buf, tmp);
  71                 }
  72                 ehci_dbg (ehci, "%s portroute %s\n",
  73                                 label, buf);
  74         }
  75 }
  76 #else
  77
  78 static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {}
  79
  80 #endif
  81
  82 #ifdef  DEBUG
  83
  84 /* check the values in the HCCPARAMS register
  85  * (host controller _Capability_ parameters)
  86  * see EHCI Spec, Table 2-5 for each value
  87  * */
  88 static void dbg_hcc_params (struct ehci_hcd *ehci, char *label)
  89 {
  90         u32     params = ehci_readl(ehci, &ehci->caps->hcc_params);
  91
  92         if (HCC_ISOC_CACHE (params)) {
  93                 ehci_dbg (ehci,
  94                         "%s hcc_params %04x caching frame %s%s%s\n",
  95                         label, params,
  96                         HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
  97                         HCC_CANPARK(params) ? " park" : "",
  98                         HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
  99         } else {
 100                 ehci_dbg (ehci,
 101                         "%s hcc_params %04x thresh %d uframes %s%s%s\n",
 102                         label,
 103                         params,
 104                         HCC_ISOC_THRES(params),
 105                         HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024",
 106                         HCC_CANPARK(params) ? " park" : "",
 107                         HCC_64BIT_ADDR(params) ? " 64 bit addr" : "");
 108         }
 109 }
 110 #else
 111
 112 static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {}
 113
 114 #endif
 115
 116 #ifdef  DEBUG
 117
 118 static void __maybe_unused
 119 dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd)
 120 {
 121         ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd,
 122                 hc32_to_cpup(ehci, &qtd->hw_next),
 123                 hc32_to_cpup(ehci, &qtd->hw_alt_next),
 124                 hc32_to_cpup(ehci, &qtd->hw_token),
 125                 hc32_to_cpup(ehci, &qtd->hw_buf [0]));
 126         if (qtd->hw_buf [1])
 127                 ehci_dbg(ehci, "  p1=%08x p2=%08x p3=%08x p4=%08x\n",
 128                         hc32_to_cpup(ehci, &qtd->hw_buf[1]),
 129                         hc32_to_cpup(ehci, &qtd->hw_buf[2]),
 130                         hc32_to_cpup(ehci, &qtd->hw_buf[3]),
 131                         hc32_to_cpup(ehci, &qtd->hw_buf[4]));
 132 }
 133
 134 static void __maybe_unused
 135 dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
 136 {
 137         ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label,
 138                 qh, qh->hw_next, qh->hw_info1, qh->hw_info2,
 139                 qh->hw_current);
 140         dbg_qtd ("overlay", ehci, (struct ehci_qtd *) &qh->hw_qtd_next);
 141 }
 142
 143 static void __maybe_unused
 144 dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd)
 145 {
 146         ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n",
 147                 label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next),
 148                 itd->urb);
 149         ehci_dbg (ehci,
 150                 "  trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
 151                 hc32_to_cpu(ehci, itd->hw_transaction[0]),
 152                 hc32_to_cpu(ehci, itd->hw_transaction[1]),
 153                 hc32_to_cpu(ehci, itd->hw_transaction[2]),
 154                 hc32_to_cpu(ehci, itd->hw_transaction[3]),
 155                 hc32_to_cpu(ehci, itd->hw_transaction[4]),
 156                 hc32_to_cpu(ehci, itd->hw_transaction[5]),
 157                 hc32_to_cpu(ehci, itd->hw_transaction[6]),
 158                 hc32_to_cpu(ehci, itd->hw_transaction[7]));
 159         ehci_dbg (ehci,
 160                 "  buf:   %08x %08x %08x %08x %08x %08x %08x\n",
 161                 hc32_to_cpu(ehci, itd->hw_bufp[0]),
 162                 hc32_to_cpu(ehci, itd->hw_bufp[1]),
 163                 hc32_to_cpu(ehci, itd->hw_bufp[2]),
 164                 hc32_to_cpu(ehci, itd->hw_bufp[3]),
 165                 hc32_to_cpu(ehci, itd->hw_bufp[4]),
 166                 hc32_to_cpu(ehci, itd->hw_bufp[5]),
 167                 hc32_to_cpu(ehci, itd->hw_bufp[6]));
 168         ehci_dbg (ehci, "  index: %d %d %d %d %d %d %d %d\n",
 169                 itd->index[0], itd->index[1], itd->index[2],
 170                 itd->index[3], itd->index[4], itd->index[5],
 171                 itd->index[6], itd->index[7]);
 172 }
 173
 174 static void __maybe_unused
 175 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
 176 {
 177         ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
 178                 label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next),
 179                 sitd->urb);
 180         ehci_dbg (ehci,
 181                 "  addr %08x sched %04x result %08x buf %08x %08x\n",
 182                 hc32_to_cpu(ehci, sitd->hw_fullspeed_ep),
 183                 hc32_to_cpu(ehci, sitd->hw_uframe),
 184                 hc32_to_cpu(ehci, sitd->hw_results),
 185                 hc32_to_cpu(ehci, sitd->hw_buf[0]),
 186                 hc32_to_cpu(ehci, sitd->hw_buf[1]));
 187 }
 188
 189 static int __maybe_unused
 190 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
 191 {
 192         return scnprintf (buf, len,
 193                 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
 194                 label, label [0] ? " " : "", status,
 195                 (status & STS_ASS) ? " Async" : "",
 196                 (status & STS_PSS) ? " Periodic" : "",
 197                 (status & STS_RECL) ? " Recl" : "",
 198                 (status & STS_HALT) ? " Halt" : "",
 199                 (status & STS_IAA) ? " IAA" : "",
 200                 (status & STS_FATAL) ? " FATAL" : "",
 201                 (status & STS_FLR) ? " FLR" : "",
 202                 (status & STS_PCD) ? " PCD" : "",
 203                 (status & STS_ERR) ? " ERR" : "",
 204                 (status & STS_INT) ? " INT" : ""
 205                 );
 206 }
 207
 208 static int __maybe_unused
 209 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
 210 {
 211         return scnprintf (buf, len,
 212                 "%s%sintrenable %02x%s%s%s%s%s%s",
 213                 label, label [0] ? " " : "", enable,
 214                 (enable & STS_IAA) ? " IAA" : "",
 215                 (enable & STS_FATAL) ? " FATAL" : "",
 216                 (enable & STS_FLR) ? " FLR" : "",
 217                 (enable & STS_PCD) ? " PCD" : "",
 218                 (enable & STS_ERR) ? " ERR" : "",
 219                 (enable & STS_INT) ? " INT" : ""
 220                 );
 221 }
 222
 223 static const char *const fls_strings [] =
 224     { "1024", "512", "256", "??" };
 225
 226 static int
 227 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
 228 {
 229         return scnprintf (buf, len,
 230                 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
 231                 label, label [0] ? " " : "", command,
 232                 (command & CMD_PARK) ? "park" : "(park)",
 233                 CMD_PARK_CNT (command),
 234                 (command >> 16) & 0x3f,
 235                 (command & CMD_LRESET) ? " LReset" : "",
 236                 (command & CMD_IAAD) ? " IAAD" : "",
 237                 (command & CMD_ASE) ? " Async" : "",
 238                 (command & CMD_PSE) ? " Periodic" : "",
 239                 fls_strings [(command >> 2) & 0x3],
 240                 (command & CMD_RESET) ? " Reset" : "",
 241                 (command & CMD_RUN) ? "RUN" : "HALT"
 242                 );
 243 }
 244
 245 static int
 246 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
 247 {
 248         char    *sig;
 249
 250         /* signaling state */
 251         switch (status & (3 << 10)) {
 252         case 0 << 10: sig = "se0"; break;
 253         case 1 << 10: sig = "k"; break;         /* low speed */
 254         case 2 << 10: sig = "j"; break;
 255         default: sig = "?"; break;
 256         }
 257
 258         return scnprintf (buf, len,
 259                 "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s",
 260                 label, label [0] ? " " : "", port, status,
 261                 (status & PORT_POWER) ? " POWER" : "",
 262                 (status & PORT_OWNER) ? " OWNER" : "",
 263                 sig,
 264                 (status & PORT_RESET) ? " RESET" : "",
 265                 (status & PORT_SUSPEND) ? " SUSPEND" : "",
 266                 (status & PORT_RESUME) ? " RESUME" : "",
 267                 (status & PORT_OCC) ? " OCC" : "",
 268                 (status & PORT_OC) ? " OC" : "",
 269                 (status & PORT_PEC) ? " PEC" : "",
 270                 (status & PORT_PE) ? " PE" : "",
 271                 (status & PORT_CSC) ? " CSC" : "",
 272                 (status & PORT_CONNECT) ? " CONNECT" : "");
 273 }
 274
 275 #else
 276 static inline void __maybe_unused
 277 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
 278 {}
 279
 280 static inline int __maybe_unused
 281 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
 282 { return 0; }
 283
 284 static inline int __maybe_unused
 285 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
 286 { return 0; }
 287
 288 static inline int __maybe_unused
 289 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
 290 { return 0; }
 291
 292 static inline int __maybe_unused
 293 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
 294 { return 0; }
 295
 296 #endif  /* DEBUG */
 297
 298 /* functions have the "wrong" filename when they're output... */
 299 #define dbg_status(ehci, label, status) { \
 300         char _buf [80]; \
 301         dbg_status_buf (_buf, sizeof _buf, label, status); \
 302         ehci_dbg (ehci, "%s\n", _buf); \
 303 }
 304
 305 #define dbg_cmd(ehci, label, command) { \
 306         char _buf [80]; \
 307         dbg_command_buf (_buf, sizeof _buf, label, command); \
 308         ehci_dbg (ehci, "%s\n", _buf); \
 309 }
 310
 311 #define dbg_port(ehci, label, port, status) { \
 312         char _buf [80]; \
 313         dbg_port_buf (_buf, sizeof _buf, label, port, status); \
 314         ehci_dbg (ehci, "%s\n", _buf); \
 315 }
 316
 317 /*-------------------------------------------------------------------------*/
 318
 319 #ifdef STUB_DEBUG_FILES
 320
 321 static inline void create_debug_files (struct ehci_hcd *bus) { }
 322 static inline void remove_debug_files (struct ehci_hcd *bus) { }
 323
 324 #else
 325
 326 /* troubleshooting help: expose state in sysfs */
 327
 328 #define speed_char(info1) ({ char tmp; \
 329                 switch (info1 & (3 << 12)) { \
 330                 case 0 << 12: tmp = 'f'; break; \
 331                 case 1 << 12: tmp = 'l'; break; \
 332                 case 2 << 12: tmp = 'h'; break; \
 333                 default: tmp = '?'; break; \
 334                 }; tmp; })
 335
 336 static inline char token_mark(struct ehci_hcd *ehci, __hc32 token)
 337 {
 338         __u32 v = hc32_to_cpu(ehci, token);
 339
 340         if (v & QTD_STS_ACTIVE)
 341                 return '*';
 342         if (v & QTD_STS_HALT)
 343                 return '-';
 344         if (!IS_SHORT_READ (v))
 345                 return ' ';
 346         /* tries to advance through hw_alt_next */
 347         return '/';
 348 }
 349
 350 static void qh_lines (
 351         struct ehci_hcd *ehci,
 352         struct ehci_qh *qh,
 353         char **nextp,
 354         unsigned *sizep
 355 )
 356 {
 357         u32                     scratch;
 358         u32                     hw_curr;
 359         struct list_head        *entry;
 360         struct ehci_qtd         *td;
 361         unsigned                temp;
 362         unsigned                size = *sizep;
 363         char                    *next = *nextp;
 364         char                    mark;
 365         u32                     list_end = EHCI_LIST_END(ehci);
 366
 367         if (qh->hw_qtd_next == list_end)        /* NEC does this */
 368                 mark = '@';
 369         else
 370                 mark = token_mark(ehci, qh->hw_token);
 371         if (mark == '/') {      /* qh_alt_next controls qh advance? */
 372                 if ((qh->hw_alt_next & QTD_MASK(ehci))
 373                                 == ehci->async->hw_alt_next)
 374                         mark = '#';     /* blocked */
 375                 else if (qh->hw_alt_next == list_end)
 376                         mark = '.';     /* use hw_qtd_next */
 377                 /* else alt_next points to some other qtd */
 378         }
 379         scratch = hc32_to_cpup(ehci, &qh->hw_info1);
 380         hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &qh->hw_current) : 0;
 381         temp = scnprintf (next, size,
 382                         "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
 383                         qh, scratch & 0x007f,
 384                         speed_char (scratch),
 385                         (scratch >> 8) & 0x000f,
 386                         scratch, hc32_to_cpup(ehci, &qh->hw_info2),
 387                         hc32_to_cpup(ehci, &qh->hw_token), mark,
 388                         (cpu_to_hc32(ehci, QTD_TOGGLE) & qh->hw_token)
 389                                 ? "data1" : "data0",
 390                         (hc32_to_cpup(ehci, &qh->hw_alt_next) >> 1) & 0x0f);
 391         size -= temp;
 392         next += temp;
 393
 394         /* hc may be modifying the list as we read it ... */
 395         list_for_each (entry, &qh->qtd_list) {
 396                 td = list_entry (entry, struct ehci_qtd, qtd_list);
 397                 scratch = hc32_to_cpup(ehci, &td->hw_token);
 398                 mark = ' ';
 399                 if (hw_curr == td->qtd_dma)
 400                         mark = '*';
 401                 else if (qh->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma))
 402                         mark = '+';
 403                 else if (QTD_LENGTH (scratch)) {
 404                         if (td->hw_alt_next == ehci->async->hw_alt_next)
 405                                 mark = '#';
 406                         else if (td->hw_alt_next != list_end)
 407                                 mark = '/';
 408                 }
 409                 temp = snprintf (next, size,
 410                                 "\n\t%p%c%s len=%d %08x urb %p",
 411                                 td, mark, ({ char *tmp;
 412                                  switch ((scratch>>8)&0x03) {
 413                                  case 0: tmp = "out"; break;
 414                                  case 1: tmp = "in"; break;
 415                                  case 2: tmp = "setup"; break;
 416                                  default: tmp = "?"; break;
 417                                  } tmp;}),
 418                                 (scratch >> 16) & 0x7fff,
 419                                 scratch,
 420                                 td->urb);
 421                 if (temp < 0)
 422                         temp = 0;
 423                 else if (size < temp)
 424                         temp = size;
 425                 size -= temp;
 426                 next += temp;
 427                 if (temp == size)
 428                         goto done;
 429         }
 430
 431         temp = snprintf (next, size, "\n");
 432         if (temp < 0)
 433                 temp = 0;
 434         else if (size < temp)
 435                 temp = size;
 436         size -= temp;
 437         next += temp;
 438
 439 done:
 440         *sizep = size;
 441         *nextp = next;
 442 }
 443
 444 static ssize_t
 445 show_async (struct class_device *class_dev, char *buf)
 446 {
 447         struct usb_bus          *bus;
 448         struct usb_hcd          *hcd;
 449         struct ehci_hcd         *ehci;
 450         unsigned long           flags;
 451         unsigned                temp, size;
 452         char                    *next;
 453         struct ehci_qh          *qh;
 454
 455         *buf = 0;
 456
 457         bus = class_get_devdata(class_dev);
 458         hcd = bus_to_hcd(bus);
 459         ehci = hcd_to_ehci (hcd);
 460         next = buf;
 461         size = PAGE_SIZE;
 462
 463         /* dumps a snapshot of the async schedule.
 464          * usually empty except for long-term bulk reads, or head.
 465          * one QH per line, and TDs we know about
 466          */
 467         spin_lock_irqsave (&ehci->lock, flags);
 468         for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
 469                 qh_lines (ehci, qh, &next, &size);
 470         if (ehci->reclaim && size > 0) {
 471                 temp = scnprintf (next, size, "\nreclaim =\n");
 472                 size -= temp;
 473                 next += temp;
 474
 475                 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
 476                         qh_lines (ehci, qh, &next, &size);
 477         }
 478         spin_unlock_irqrestore (&ehci->lock, flags);
 479
 480         return strlen (buf);
 481 }
 482 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
 483
 484 #define DBG_SCHED_LIMIT 64
 485
 486 static ssize_t
 487 show_periodic (struct class_device *class_dev, char *buf)
 488 {
 489         struct usb_bus          *bus;
 490         struct usb_hcd          *hcd;
 491         struct ehci_hcd         *ehci;
 492         unsigned long           flags;
 493         union ehci_shadow       p, *seen;
 494         unsigned                temp, size, seen_count;
 495         char                    *next;
 496         unsigned                i;
 497         __hc32                  tag;
 498
 499         if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
 500                 return 0;
 501         seen_count = 0;
 502
 503         bus = class_get_devdata(class_dev);
 504         hcd = bus_to_hcd(bus);
 505         ehci = hcd_to_ehci (hcd);
 506         next = buf;
 507         size = PAGE_SIZE;
 508
 509         temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
 510         size -= temp;
 511         next += temp;
 512
 513         /* dump a snapshot of the periodic schedule.
 514          * iso changes, interrupt usually doesn't.
 515          */
 516         spin_lock_irqsave (&ehci->lock, flags);
 517         for (i = 0; i < ehci->periodic_size; i++) {
 518                 p = ehci->pshadow [i];
 519                 if (likely (!p.ptr))
 520                         continue;
 521                 tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]);
 522
 523                 temp = scnprintf (next, size, "%4d: ", i);
 524                 size -= temp;
 525                 next += temp;
 526
 527                 do {
 528                         switch (hc32_to_cpu(ehci, tag)) {
 529                         case Q_TYPE_QH:
 530                                 temp = scnprintf (next, size, " qh%d-%04x/%p",
 531                                                 p.qh->period,
 532                                                 hc32_to_cpup(ehci,
 533                                                                 &p.qh->hw_info2)
 534                                                         /* uframe masks */
 535                                                         & (QH_CMASK | QH_SMASK),
 536                                                 p.qh);
 537                                 size -= temp;
 538                                 next += temp;
 539                                 /* don't repeat what follows this qh */
 540                                 for (temp = 0; temp < seen_count; temp++) {
 541                                         if (seen [temp].ptr != p.ptr)
 542                                                 continue;
 543                                         if (p.qh->qh_next.ptr)
 544                                                 temp = scnprintf (next, size,
 545                                                         " ...");
 546                                         p.ptr = NULL;
 547                                         break;
 548                                 }
 549                                 /* show more info the first time around */
 550                                 if (temp == seen_count && p.ptr) {
 551                                         u32     scratch = hc32_to_cpup(ehci,
 552                                                         &p.qh->hw_info1);
 553                                         struct ehci_qtd *qtd;
 554                                         char            *type = "";
 555
 556                                         /* count tds, get ep direction */
 557                                         temp = 0;
 558                                         list_for_each_entry (qtd,
 559                                                         &p.qh->qtd_list,
 560                                                         qtd_list) {
 561                                                 temp++;
 562                                                 switch (0x03 & (hc32_to_cpu(
 563                                                         ehci,
 564                                                         qtd->hw_token) >> 8)) {
 565                                                 case 0: type = "out"; continue;
 566                                                 case 1: type = "in"; continue;
 567                                                 }
 568                                         }
 569
 570                                         temp = scnprintf (next, size,
 571                                                 " (%c%d ep%d%s "
 572                                                 "[%d/%d] q%d p%d)",
 573                                                 speed_char (scratch),
 574                                                 scratch & 0x007f,
 575                                                 (scratch >> 8) & 0x000f, type,
 576                                                 p.qh->usecs, p.qh->c_usecs,
 577                                                 temp,
 578                                                 0x7ff & (scratch >> 16));
 579
 580                                         if (seen_count < DBG_SCHED_LIMIT)
 581                                                 seen [seen_count++].qh = p.qh;
 582                                 } else
 583                                         temp = 0;
 584                                 if (p.qh) {
 585                                         tag = Q_NEXT_TYPE(ehci, p.qh->hw_next);
 586                                         p = p.qh->qh_next;
 587                                 }
 588                                 break;
 589                         case Q_TYPE_FSTN:
 590                                 temp = scnprintf (next, size,
 591                                         " fstn-%8x/%p", p.fstn->hw_prev,
 592                                         p.fstn);
 593                                 tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next);
 594                                 p = p.fstn->fstn_next;
 595                                 break;
 596                         case Q_TYPE_ITD:
 597                                 temp = scnprintf (next, size,
 598                                         " itd/%p", p.itd);
 599                                 tag = Q_NEXT_TYPE(ehci, p.itd->hw_next);
 600                                 p = p.itd->itd_next;
 601                                 break;
 602                         case Q_TYPE_SITD:
 603                                 temp = scnprintf (next, size,
 604                                         " sitd%d-%04x/%p",
 605                                         p.sitd->stream->interval,
 606                                         hc32_to_cpup(ehci, &p.sitd->hw_uframe)
 607                                                 & 0x0000ffff,
 608                                         p.sitd);
 609                                 tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next);
 610                                 p = p.sitd->sitd_next;
 611                                 break;
 612                         }
 613                         size -= temp;
 614                         next += temp;
 615                 } while (p.ptr);
 616
 617                 temp = scnprintf (next, size, "\n");
 618                 size -= temp;
 619                 next += temp;
 620         }
 621         spin_unlock_irqrestore (&ehci->lock, flags);
 622         kfree (seen);
 623
 624         return PAGE_SIZE - size;
 625 }
 626 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
 627
 628 #undef DBG_SCHED_LIMIT
 629
 630 static ssize_t
 631 show_registers (struct class_device *class_dev, char *buf)
 632 {
 633         struct usb_bus          *bus;
 634         struct usb_hcd          *hcd;
 635         struct ehci_hcd         *ehci;
 636         unsigned long           flags;
 637         unsigned                temp, size, i;
 638         char                    *next, scratch [80];
 639         static char             fmt [] = "%*s\n";
 640         static char             label [] = "";
 641
 642         bus = class_get_devdata(class_dev);
 643         hcd = bus_to_hcd(bus);
 644         ehci = hcd_to_ehci (hcd);
 645         next = buf;
 646         size = PAGE_SIZE;
 647
 648         spin_lock_irqsave (&ehci->lock, flags);
 649
 650         if (bus->controller->power.power_state.event) {
 651                 size = scnprintf (next, size,
 652                         "bus %s, device %s (driver " DRIVER_VERSION ")\n"
 653                         "%s\n"
 654                         "SUSPENDED (no register access)\n",
 655                         hcd->self.controller->bus->name,
 656                         hcd->self.controller->bus_id,
 657                         hcd->product_desc);
 658                 goto done;
 659         }
 660
 661         /* Capability Registers */
 662         i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase));
 663         temp = scnprintf (next, size,
 664                 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
 665                 "%s\n"
 666                 "EHCI %x.%02x, hcd state %d\n",
 667                 hcd->self.controller->bus->name,
 668                 hcd->self.controller->bus_id,
 669                 hcd->product_desc,
 670                 i >> 8, i & 0x0ff, hcd->state);
 671         size -= temp;
 672         next += temp;
 673
 674 #ifdef  CONFIG_PCI
 675         /* EHCI 0.96 and later may have "extended capabilities" */
 676         if (hcd->self.controller->bus == &pci_bus_type) {
 677                 struct pci_dev  *pdev;
 678                 u32             offset, cap, cap2;
 679                 unsigned        count = 256/4;
 680
 681                 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
 682                 offset = HCC_EXT_CAPS(ehci_readl(ehci,
 683                                 &ehci->caps->hcc_params));
 684                 while (offset && count--) {
 685                         pci_read_config_dword (pdev, offset, &cap);
 686                         switch (cap & 0xff) {
 687                         case 1:
 688                                 temp = scnprintf (next, size,
 689                                         "ownership %08x%s%s\n", cap,
 690                                         (cap & (1 << 24)) ? " linux" : "",
 691                                         (cap & (1 << 16)) ? " firmware" : "");
 692                                 size -= temp;
 693                                 next += temp;
 694
 695                                 offset += 4;
 696                                 pci_read_config_dword (pdev, offset, &cap2);
 697                                 temp = scnprintf (next, size,
 698                                         "SMI sts/enable 0x%08x\n", cap2);
 699                                 size -= temp;
 700                                 next += temp;
 701                                 break;
 702                         case 0:         /* illegal reserved capability */
 703                                 cap = 0;
 704                                 /* FALLTHROUGH */
 705                         default:                /* unknown */
 706                                 break;
 707                         }
 708                         temp = (cap >> 8) & 0xff;
 709                 }
 710         }
 711 #endif
 712
 713         // FIXME interpret both types of params
 714         i = ehci_readl(ehci, &ehci->caps->hcs_params);
 715         temp = scnprintf (next, size, "structural params 0x%08x\n", i);
 716         size -= temp;
 717         next += temp;
 718
 719         i = ehci_readl(ehci, &ehci->caps->hcc_params);
 720         temp = scnprintf (next, size, "capability params 0x%08x\n", i);
 721         size -= temp;
 722         next += temp;
 723
 724         /* Operational Registers */
 725         temp = dbg_status_buf (scratch, sizeof scratch, label,
 726                         ehci_readl(ehci, &ehci->regs->status));
 727         temp = scnprintf (next, size, fmt, temp, scratch);
 728         size -= temp;
 729         next += temp;
 730
 731         temp = dbg_command_buf (scratch, sizeof scratch, label,
 732                         ehci_readl(ehci, &ehci->regs->command));
 733         temp = scnprintf (next, size, fmt, temp, scratch);
 734         size -= temp;
 735         next += temp;
 736
 737         temp = dbg_intr_buf (scratch, sizeof scratch, label,
 738                         ehci_readl(ehci, &ehci->regs->intr_enable));
 739         temp = scnprintf (next, size, fmt, temp, scratch);
 740         size -= temp;
 741         next += temp;
 742
 743         temp = scnprintf (next, size, "uframe %04x\n",
 744                         ehci_readl(ehci, &ehci->regs->frame_index));
 745         size -= temp;
 746         next += temp;
 747
 748         for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
 749                 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
 750                                 ehci_readl(ehci,
 751                                         &ehci->regs->port_status[i - 1]));
 752                 temp = scnprintf (next, size, fmt, temp, scratch);
 753                 size -= temp;
 754                 next += temp;
 755                 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
 756                         temp = scnprintf (next, size,
 757                                         "    debug control %08x\n",
 758                                         ehci_readl(ehci,
 759                                                 &ehci->debug->control));
 760                         size -= temp;
 761                         next += temp;
 762                 }
 763         }
 764
 765         if (ehci->reclaim) {
 766                 temp = scnprintf (next, size, "reclaim qh %p%s\n",
 767                                 ehci->reclaim,
 768                                 ehci->reclaim_ready ? " ready" : "");
 769                 size -= temp;
 770                 next += temp;
 771         }
 772
 773 #ifdef EHCI_STATS
 774         temp = scnprintf (next, size,
 775                 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
 776                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
 777                 ehci->stats.lost_iaa);
 778         size -= temp;
 779         next += temp;
 780
 781         temp = scnprintf (next, size, "complete %ld unlink %ld\n",
 782                 ehci->stats.complete, ehci->stats.unlink);
 783         size -= temp;
 784         next += temp;
 785 #endif
 786
 787 done:
 788         spin_unlock_irqrestore (&ehci->lock, flags);
 789
 790         return PAGE_SIZE - size;
 791 }
 792 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
 793
 794 static inline void create_debug_files (struct ehci_hcd *ehci)
 795 {
 796         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
 797         int retval;
 798
 799         retval = class_device_create_file(cldev, &class_device_attr_async);
 800         retval = class_device_create_file(cldev, &class_device_attr_periodic);
 801         retval = class_device_create_file(cldev, &class_device_attr_registers);
 802 }
 803
 804 static inline void remove_debug_files (struct ehci_hcd *ehci)
 805 {
 806         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
 807
 808         class_device_remove_file(cldev, &class_device_attr_async);
 809         class_device_remove_file(cldev, &class_device_attr_periodic);
 810         class_device_remove_file(cldev, &class_device_attr_registers);
 811 }
 812
 813 #endif /* STUB_DEBUG_FILES */
 814