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 = readl (&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 = readl (&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 __attribute__((__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                 le32_to_cpup (&qtd->hw_next),
 123                 le32_to_cpup (&qtd->hw_alt_next),
 124                 le32_to_cpup (&qtd->hw_token),
 125                 le32_to_cpup (&qtd->hw_buf [0]));
 126         if (qtd->hw_buf [1])
 127                 ehci_dbg (ehci, "  p1=%08x p2=%08x p3=%08x p4=%08x\n",
 128                         le32_to_cpup (&qtd->hw_buf [1]),
 129                         le32_to_cpup (&qtd->hw_buf [2]),
 130                         le32_to_cpup (&qtd->hw_buf [3]),
 131                         le32_to_cpup (&qtd->hw_buf [4]));
 132 }
 133
 134 static void __attribute__((__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 __attribute__((__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, le32_to_cpu(itd->hw_next), itd->urb);
 148         ehci_dbg (ehci,
 149                 "  trans: %08x %08x %08x %08x %08x %08x %08x %08x\n",
 150                 le32_to_cpu(itd->hw_transaction[0]),
 151                 le32_to_cpu(itd->hw_transaction[1]),
 152                 le32_to_cpu(itd->hw_transaction[2]),
 153                 le32_to_cpu(itd->hw_transaction[3]),
 154                 le32_to_cpu(itd->hw_transaction[4]),
 155                 le32_to_cpu(itd->hw_transaction[5]),
 156                 le32_to_cpu(itd->hw_transaction[6]),
 157                 le32_to_cpu(itd->hw_transaction[7]));
 158         ehci_dbg (ehci,
 159                 "  buf:   %08x %08x %08x %08x %08x %08x %08x\n",
 160                 le32_to_cpu(itd->hw_bufp[0]),
 161                 le32_to_cpu(itd->hw_bufp[1]),
 162                 le32_to_cpu(itd->hw_bufp[2]),
 163                 le32_to_cpu(itd->hw_bufp[3]),
 164                 le32_to_cpu(itd->hw_bufp[4]),
 165                 le32_to_cpu(itd->hw_bufp[5]),
 166                 le32_to_cpu(itd->hw_bufp[6]));
 167         ehci_dbg (ehci, "  index: %d %d %d %d %d %d %d %d\n",
 168                 itd->index[0], itd->index[1], itd->index[2],
 169                 itd->index[3], itd->index[4], itd->index[5],
 170                 itd->index[6], itd->index[7]);
 171 }
 172
 173 static void __attribute__((__unused__))
 174 dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd)
 175 {
 176         ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n",
 177                 label, sitd->frame, sitd, le32_to_cpu(sitd->hw_next), sitd->urb);
 178         ehci_dbg (ehci,
 179                 "  addr %08x sched %04x result %08x buf %08x %08x\n",
 180                 le32_to_cpu(sitd->hw_fullspeed_ep),
 181                 le32_to_cpu(sitd->hw_uframe),
 182                 le32_to_cpu(sitd->hw_results),
 183                 le32_to_cpu(sitd->hw_buf [0]),
 184                 le32_to_cpu(sitd->hw_buf [1]));
 185 }
 186
 187 static int __attribute__((__unused__))
 188 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
 189 {
 190         return scnprintf (buf, len,
 191                 "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s",
 192                 label, label [0] ? " " : "", status,
 193                 (status & STS_ASS) ? " Async" : "",
 194                 (status & STS_PSS) ? " Periodic" : "",
 195                 (status & STS_RECL) ? " Recl" : "",
 196                 (status & STS_HALT) ? " Halt" : "",
 197                 (status & STS_IAA) ? " IAA" : "",
 198                 (status & STS_FATAL) ? " FATAL" : "",
 199                 (status & STS_FLR) ? " FLR" : "",
 200                 (status & STS_PCD) ? " PCD" : "",
 201                 (status & STS_ERR) ? " ERR" : "",
 202                 (status & STS_INT) ? " INT" : ""
 203                 );
 204 }
 205
 206 static int __attribute__((__unused__))
 207 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
 208 {
 209         return scnprintf (buf, len,
 210                 "%s%sintrenable %02x%s%s%s%s%s%s",
 211                 label, label [0] ? " " : "", enable,
 212                 (enable & STS_IAA) ? " IAA" : "",
 213                 (enable & STS_FATAL) ? " FATAL" : "",
 214                 (enable & STS_FLR) ? " FLR" : "",
 215                 (enable & STS_PCD) ? " PCD" : "",
 216                 (enable & STS_ERR) ? " ERR" : "",
 217                 (enable & STS_INT) ? " INT" : ""
 218                 );
 219 }
 220
 221 static const char *const fls_strings [] =
 222     { "1024", "512", "256", "??" };
 223
 224 static int
 225 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
 226 {
 227         return scnprintf (buf, len,
 228                 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
 229                 label, label [0] ? " " : "", command,
 230                 (command & CMD_PARK) ? "park" : "(park)",
 231                 CMD_PARK_CNT (command),
 232                 (command >> 16) & 0x3f,
 233                 (command & CMD_LRESET) ? " LReset" : "",
 234                 (command & CMD_IAAD) ? " IAAD" : "",
 235                 (command & CMD_ASE) ? " Async" : "",
 236                 (command & CMD_PSE) ? " Periodic" : "",
 237                 fls_strings [(command >> 2) & 0x3],
 238                 (command & CMD_RESET) ? " Reset" : "",
 239                 (command & CMD_RUN) ? "RUN" : "HALT"
 240                 );
 241 }
 242
 243 static int
 244 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
 245 {
 246         char    *sig;
 247
 248         /* signaling state */
 249         switch (status & (3 << 10)) {
 250         case 0 << 10: sig = "se0"; break;
 251         case 1 << 10: sig = "k"; break;         /* low speed */
 252         case 2 << 10: sig = "j"; break;
 253         default: sig = "?"; break;
 254         }
 255
 256         return scnprintf (buf, len,
 257                 "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s",
 258                 label, label [0] ? " " : "", port, status,
 259                 (status & PORT_POWER) ? " POWER" : "",
 260                 (status & PORT_OWNER) ? " OWNER" : "",
 261                 sig,
 262                 (status & PORT_RESET) ? " RESET" : "",
 263                 (status & PORT_SUSPEND) ? " SUSPEND" : "",
 264                 (status & PORT_RESUME) ? " RESUME" : "",
 265                 (status & PORT_OCC) ? " OCC" : "",
 266                 (status & PORT_OC) ? " OC" : "",
 267                 (status & PORT_PEC) ? " PEC" : "",
 268                 (status & PORT_PE) ? " PE" : "",
 269                 (status & PORT_CSC) ? " CSC" : "",
 270                 (status & PORT_CONNECT) ? " CONNECT" : ""
 271             );
 272 }
 273
 274 #else
 275 static inline void __attribute__((__unused__))
 276 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
 277 {}
 278
 279 static inline int __attribute__((__unused__))
 280 dbg_status_buf (char *buf, unsigned len, const char *label, u32 status)
 281 { return 0; }
 282
 283 static inline int __attribute__((__unused__))
 284 dbg_command_buf (char *buf, unsigned len, const char *label, u32 command)
 285 { return 0; }
 286
 287 static inline int __attribute__((__unused__))
 288 dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable)
 289 { return 0; }
 290
 291 static inline int __attribute__((__unused__))
 292 dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status)
 293 { return 0; }
 294
 295 #endif  /* DEBUG */
 296
 297 /* functions have the "wrong" filename when they're output... */
 298 #define dbg_status(ehci, label, status) { \
 299         char _buf [80]; \
 300         dbg_status_buf (_buf, sizeof _buf, label, status); \
 301         ehci_dbg (ehci, "%s\n", _buf); \
 302 }
 303
 304 #define dbg_cmd(ehci, label, command) { \
 305         char _buf [80]; \
 306         dbg_command_buf (_buf, sizeof _buf, label, command); \
 307         ehci_dbg (ehci, "%s\n", _buf); \
 308 }
 309
 310 #define dbg_port(ehci, label, port, status) { \
 311         char _buf [80]; \
 312         dbg_port_buf (_buf, sizeof _buf, label, port, status); \
 313         ehci_dbg (ehci, "%s\n", _buf); \
 314 }
 315
 316 /*-------------------------------------------------------------------------*/
 317
 318 #ifdef STUB_DEBUG_FILES
 319
 320 static inline void create_debug_files (struct ehci_hcd *bus) { }
 321 static inline void remove_debug_files (struct ehci_hcd *bus) { }
 322
 323 #else
 324
 325 /* troubleshooting help: expose state in driverfs */
 326
 327 #define speed_char(info1) ({ char tmp; \
 328                 switch (info1 & (3 << 12)) { \
 329                 case 0 << 12: tmp = 'f'; break; \
 330                 case 1 << 12: tmp = 'l'; break; \
 331                 case 2 << 12: tmp = 'h'; break; \
 332                 default: tmp = '?'; break; \
 333                 }; tmp; })
 334
 335 static inline char token_mark (__le32 token)
 336 {
 337         __u32 v = le32_to_cpu (token);
 338         if (v & QTD_STS_ACTIVE)
 339                 return '*';
 340         if (v & QTD_STS_HALT)
 341                 return '-';
 342         if (!IS_SHORT_READ (v))
 343                 return ' ';
 344         /* tries to advance through hw_alt_next */
 345         return '/';
 346 }
 347
 348 static void qh_lines (
 349         struct ehci_hcd *ehci,
 350         struct ehci_qh *qh,
 351         char **nextp,
 352         unsigned *sizep
 353 )
 354 {
 355         u32                     scratch;
 356         u32                     hw_curr;
 357         struct list_head        *entry;
 358         struct ehci_qtd         *td;
 359         unsigned                temp;
 360         unsigned                size = *sizep;
 361         char                    *next = *nextp;
 362         char                    mark;
 363
 364         if (qh->hw_qtd_next == EHCI_LIST_END)   /* NEC does this */
 365                 mark = '@';
 366         else
 367                 mark = token_mark (qh->hw_token);
 368         if (mark == '/') {      /* qh_alt_next controls qh advance? */
 369                 if ((qh->hw_alt_next & QTD_MASK) == ehci->async->hw_alt_next)
 370                         mark = '#';     /* blocked */
 371                 else if (qh->hw_alt_next == EHCI_LIST_END)
 372                         mark = '.';     /* use hw_qtd_next */
 373                 /* else alt_next points to some other qtd */
 374         }
 375         scratch = le32_to_cpup (&qh->hw_info1);
 376         hw_curr = (mark == '*') ? le32_to_cpup (&qh->hw_current) : 0;
 377         temp = scnprintf (next, size,
 378                         "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
 379                         qh, scratch & 0x007f,
 380                         speed_char (scratch),
 381                         (scratch >> 8) & 0x000f,
 382                         scratch, le32_to_cpup (&qh->hw_info2),
 383                         le32_to_cpup (&qh->hw_token), mark,
 384                         (__constant_cpu_to_le32 (QTD_TOGGLE) & qh->hw_token)
 385                                 ? "data1" : "data0",
 386                         (le32_to_cpup (&qh->hw_alt_next) >> 1) & 0x0f);
 387         size -= temp;
 388         next += temp;
 389
 390         /* hc may be modifying the list as we read it ... */
 391         list_for_each (entry, &qh->qtd_list) {
 392                 td = list_entry (entry, struct ehci_qtd, qtd_list);
 393                 scratch = le32_to_cpup (&td->hw_token);
 394                 mark = ' ';
 395                 if (hw_curr == td->qtd_dma)
 396                         mark = '*';
 397                 else if (qh->hw_qtd_next == cpu_to_le32(td->qtd_dma))
 398                         mark = '+';
 399                 else if (QTD_LENGTH (scratch)) {
 400                         if (td->hw_alt_next == ehci->async->hw_alt_next)
 401                                 mark = '#';
 402                         else if (td->hw_alt_next != EHCI_LIST_END)
 403                                 mark = '/';
 404                 }
 405                 temp = snprintf (next, size,
 406                                 "\n\t%p%c%s len=%d %08x urb %p",
 407                                 td, mark, ({ char *tmp;
 408                                  switch ((scratch>>8)&0x03) {
 409                                  case 0: tmp = "out"; break;
 410                                  case 1: tmp = "in"; break;
 411                                  case 2: tmp = "setup"; break;
 412                                  default: tmp = "?"; break;
 413                                  } tmp;}),
 414                                 (scratch >> 16) & 0x7fff,
 415                                 scratch,
 416                                 td->urb);
 417                 if (temp < 0)
 418                         temp = 0;
 419                 else if (size < temp)
 420                         temp = size;
 421                 size -= temp;
 422                 next += temp;
 423                 if (temp == size)
 424                         goto done;
 425         }
 426
 427         temp = snprintf (next, size, "\n");
 428         if (temp < 0)
 429                 temp = 0;
 430         else if (size < temp)
 431                 temp = size;
 432         size -= temp;
 433         next += temp;
 434
 435 done:
 436         *sizep = size;
 437         *nextp = next;
 438 }
 439
 440 static ssize_t
 441 show_async (struct class_device *class_dev, char *buf)
 442 {
 443         struct usb_bus          *bus;
 444         struct usb_hcd          *hcd;
 445         struct ehci_hcd         *ehci;
 446         unsigned long           flags;
 447         unsigned                temp, size;
 448         char                    *next;
 449         struct ehci_qh          *qh;
 450
 451         *buf = 0;
 452
 453         bus = class_get_devdata(class_dev);
 454         hcd = bus_to_hcd(bus);
 455         ehci = hcd_to_ehci (hcd);
 456         next = buf;
 457         size = PAGE_SIZE;
 458
 459         /* dumps a snapshot of the async schedule.
 460          * usually empty except for long-term bulk reads, or head.
 461          * one QH per line, and TDs we know about
 462          */
 463         spin_lock_irqsave (&ehci->lock, flags);
 464         for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
 465                 qh_lines (ehci, qh, &next, &size);
 466         if (ehci->reclaim && size > 0) {
 467                 temp = scnprintf (next, size, "\nreclaim =\n");
 468                 size -= temp;
 469                 next += temp;
 470
 471                 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
 472                         qh_lines (ehci, qh, &next, &size);
 473         }
 474         spin_unlock_irqrestore (&ehci->lock, flags);
 475
 476         return strlen (buf);
 477 }
 478 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
 479
 480 #define DBG_SCHED_LIMIT 64
 481
 482 static ssize_t
 483 show_periodic (struct class_device *class_dev, char *buf)
 484 {
 485         struct usb_bus          *bus;
 486         struct usb_hcd          *hcd;
 487         struct ehci_hcd         *ehci;
 488         unsigned long           flags;
 489         union ehci_shadow       p, *seen;
 490         unsigned                temp, size, seen_count;
 491         char                    *next;
 492         unsigned                i;
 493         __le32                  tag;
 494
 495         if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, SLAB_ATOMIC)))
 496                 return 0;
 497         seen_count = 0;
 498
 499         bus = class_get_devdata(class_dev);
 500         hcd = bus_to_hcd(bus);
 501         ehci = hcd_to_ehci (hcd);
 502         next = buf;
 503         size = PAGE_SIZE;
 504
 505         temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
 506         size -= temp;
 507         next += temp;
 508
 509         /* dump a snapshot of the periodic schedule.
 510          * iso changes, interrupt usually doesn't.
 511          */
 512         spin_lock_irqsave (&ehci->lock, flags);
 513         for (i = 0; i < ehci->periodic_size; i++) {
 514                 p = ehci->pshadow [i];
 515                 if (likely (!p.ptr))
 516                         continue;
 517                 tag = Q_NEXT_TYPE (ehci->periodic [i]);
 518
 519                 temp = scnprintf (next, size, "%4d: ", i);
 520                 size -= temp;
 521                 next += temp;
 522
 523                 do {
 524                         switch (tag) {
 525                         case Q_TYPE_QH:
 526                                 temp = scnprintf (next, size, " qh%d-%04x/%p",
 527                                                 p.qh->period,
 528                                                 le32_to_cpup (&p.qh->hw_info2)
 529                                                         /* uframe masks */
 530                                                         & (QH_CMASK | QH_SMASK),
 531                                                 p.qh);
 532                                 size -= temp;
 533                                 next += temp;
 534                                 /* don't repeat what follows this qh */
 535                                 for (temp = 0; temp < seen_count; temp++) {
 536                                         if (seen [temp].ptr != p.ptr)
 537                                                 continue;
 538                                         if (p.qh->qh_next.ptr)
 539                                                 temp = scnprintf (next, size,
 540                                                         " ...");
 541                                         p.ptr = NULL;
 542                                         break;
 543                                 }
 544                                 /* show more info the first time around */
 545                                 if (temp == seen_count && p.ptr) {
 546                                         u32     scratch = le32_to_cpup (
 547                                                         &p.qh->hw_info1);
 548                                         struct ehci_qtd *qtd;
 549                                         char            *type = "";
 550
 551                                         /* count tds, get ep direction */
 552                                         temp = 0;
 553                                         list_for_each_entry (qtd,
 554                                                         &p.qh->qtd_list,
 555                                                         qtd_list) {
 556                                                 temp++;
 557                                                 switch (0x03 & (le32_to_cpu (
 558                                                         qtd->hw_token) >> 8)) {
 559                                                 case 0: type = "out"; continue;
 560                                                 case 1: type = "in"; continue;
 561                                                 }
 562                                         }
 563
 564                                         temp = scnprintf (next, size,
 565                                                 " (%c%d ep%d%s "
 566                                                 "[%d/%d] q%d p%d)",
 567                                                 speed_char (scratch),
 568                                                 scratch & 0x007f,
 569                                                 (scratch >> 8) & 0x000f, type,
 570                                                 p.qh->usecs, p.qh->c_usecs,
 571                                                 temp,
 572                                                 0x7ff & (scratch >> 16));
 573
 574                                         if (seen_count < DBG_SCHED_LIMIT)
 575                                                 seen [seen_count++].qh = p.qh;
 576                                 } else
 577                                         temp = 0;
 578                                 if (p.qh) {
 579                                         tag = Q_NEXT_TYPE (p.qh->hw_next);
 580                                         p = p.qh->qh_next;
 581                                 }
 582                                 break;
 583                         case Q_TYPE_FSTN:
 584                                 temp = scnprintf (next, size,
 585                                         " fstn-%8x/%p", p.fstn->hw_prev,
 586                                         p.fstn);
 587                                 tag = Q_NEXT_TYPE (p.fstn->hw_next);
 588                                 p = p.fstn->fstn_next;
 589                                 break;
 590                         case Q_TYPE_ITD:
 591                                 temp = scnprintf (next, size,
 592                                         " itd/%p", p.itd);
 593                                 tag = Q_NEXT_TYPE (p.itd->hw_next);
 594                                 p = p.itd->itd_next;
 595                                 break;
 596                         case Q_TYPE_SITD:
 597                                 temp = scnprintf (next, size,
 598                                         " sitd%d-%04x/%p",
 599                                         p.sitd->stream->interval,
 600                                         le32_to_cpup (&p.sitd->hw_uframe)
 601                                                 & 0x0000ffff,
 602                                         p.sitd);
 603                                 tag = Q_NEXT_TYPE (p.sitd->hw_next);
 604                                 p = p.sitd->sitd_next;
 605                                 break;
 606                         }
 607                         size -= temp;
 608                         next += temp;
 609                 } while (p.ptr);
 610
 611                 temp = scnprintf (next, size, "\n");
 612                 size -= temp;
 613                 next += temp;
 614         }
 615         spin_unlock_irqrestore (&ehci->lock, flags);
 616         kfree (seen);
 617
 618         return PAGE_SIZE - size;
 619 }
 620 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
 621
 622 #undef DBG_SCHED_LIMIT
 623
 624 static ssize_t
 625 show_registers (struct class_device *class_dev, char *buf)
 626 {
 627         struct usb_bus          *bus;
 628         struct usb_hcd          *hcd;
 629         struct ehci_hcd         *ehci;
 630         unsigned long           flags;
 631         unsigned                temp, size, i;
 632         char                    *next, scratch [80];
 633         static char             fmt [] = "%*s\n";
 634         static char             label [] = "";
 635
 636         bus = class_get_devdata(class_dev);
 637         hcd = bus_to_hcd(bus);
 638         ehci = hcd_to_ehci (hcd);
 639         next = buf;
 640         size = PAGE_SIZE;
 641
 642         spin_lock_irqsave (&ehci->lock, flags);
 643
 644         if (bus->controller->power.power_state.event) {
 645                 size = scnprintf (next, size,
 646                         "bus %s, device %s (driver " DRIVER_VERSION ")\n"
 647                         "%s\n"
 648                         "SUSPENDED (no register access)\n",
 649                         hcd->self.controller->bus->name,
 650                         hcd->self.controller->bus_id,
 651                         hcd->product_desc);
 652                 goto done;
 653         }
 654
 655         /* Capability Registers */
 656         i = HC_VERSION(readl (&ehci->caps->hc_capbase));
 657         temp = scnprintf (next, size,
 658                 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
 659                 "%s\n"
 660                 "EHCI %x.%02x, hcd state %d\n",
 661                 hcd->self.controller->bus->name,
 662                 hcd->self.controller->bus_id,
 663                 hcd->product_desc,
 664                 i >> 8, i & 0x0ff, hcd->state);
 665         size -= temp;
 666         next += temp;
 667
 668 #ifdef  CONFIG_PCI
 669         /* EHCI 0.96 and later may have "extended capabilities" */
 670         if (hcd->self.controller->bus == &pci_bus_type) {
 671                 struct pci_dev  *pdev;
 672                 u32             offset, cap, cap2;
 673                 unsigned        count = 256/4;
 674
 675                 pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
 676                 offset = HCC_EXT_CAPS (readl (&ehci->caps->hcc_params));
 677                 while (offset && count--) {
 678                         pci_read_config_dword (pdev, offset, &cap);
 679                         switch (cap & 0xff) {
 680                         case 1:
 681                                 temp = scnprintf (next, size,
 682                                         "ownership %08x%s%s\n", cap,
 683                                         (cap & (1 << 24)) ? " linux" : "",
 684                                         (cap & (1 << 16)) ? " firmware" : "");
 685                                 size -= temp;
 686                                 next += temp;
 687
 688                                 offset += 4;
 689                                 pci_read_config_dword (pdev, offset, &cap2);
 690                                 temp = scnprintf (next, size,
 691                                         "SMI sts/enable 0x%08x\n", cap2);
 692                                 size -= temp;
 693                                 next += temp;
 694                                 break;
 695                         case 0:         /* illegal reserved capability */
 696                                 cap = 0;
 697                                 /* FALLTHROUGH */
 698                         default:                /* unknown */
 699                                 break;
 700                         }
 701                         temp = (cap >> 8) & 0xff;
 702                 }
 703         }
 704 #endif
 705
 706         // FIXME interpret both types of params
 707         i = readl (&ehci->caps->hcs_params);
 708         temp = scnprintf (next, size, "structural params 0x%08x\n", i);
 709         size -= temp;
 710         next += temp;
 711
 712         i = readl (&ehci->caps->hcc_params);
 713         temp = scnprintf (next, size, "capability params 0x%08x\n", i);
 714         size -= temp;
 715         next += temp;
 716
 717         /* Operational Registers */
 718         temp = dbg_status_buf (scratch, sizeof scratch, label,
 719                         readl (&ehci->regs->status));
 720         temp = scnprintf (next, size, fmt, temp, scratch);
 721         size -= temp;
 722         next += temp;
 723
 724         temp = dbg_command_buf (scratch, sizeof scratch, label,
 725                         readl (&ehci->regs->command));
 726         temp = scnprintf (next, size, fmt, temp, scratch);
 727         size -= temp;
 728         next += temp;
 729
 730         temp = dbg_intr_buf (scratch, sizeof scratch, label,
 731                         readl (&ehci->regs->intr_enable));
 732         temp = scnprintf (next, size, fmt, temp, scratch);
 733         size -= temp;
 734         next += temp;
 735
 736         temp = scnprintf (next, size, "uframe %04x\n",
 737                         readl (&ehci->regs->frame_index));
 738         size -= temp;
 739         next += temp;
 740
 741         for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) {
 742                 temp = dbg_port_buf (scratch, sizeof scratch, label, i,
 743                                 readl (&ehci->regs->port_status [i - 1]));
 744                 temp = scnprintf (next, size, fmt, temp, scratch);
 745                 size -= temp;
 746                 next += temp;
 747                 if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) {
 748                         temp = scnprintf (next, size,
 749                                         "    debug control %08x\n",
 750                                         readl (&ehci->debug->control));
 751                         size -= temp;
 752                         next += temp;
 753                 }
 754         }
 755
 756         if (ehci->reclaim) {
 757                 temp = scnprintf (next, size, "reclaim qh %p%s\n",
 758                                 ehci->reclaim,
 759                                 ehci->reclaim_ready ? " ready" : "");
 760                 size -= temp;
 761                 next += temp;
 762         }
 763
 764 #ifdef EHCI_STATS
 765         temp = scnprintf (next, size,
 766                 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
 767                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
 768                 ehci->stats.lost_iaa);
 769         size -= temp;
 770         next += temp;
 771
 772         temp = scnprintf (next, size, "complete %ld unlink %ld\n",
 773                 ehci->stats.complete, ehci->stats.unlink);
 774         size -= temp;
 775         next += temp;
 776 #endif
 777
 778 done:
 779         spin_unlock_irqrestore (&ehci->lock, flags);
 780
 781         return PAGE_SIZE - size;
 782 }
 783 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
 784
 785 static inline void create_debug_files (struct ehci_hcd *ehci)
 786 {
 787         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
 788         int retval;
 789
 790         retval = class_device_create_file(cldev, &class_device_attr_async);
 791         retval = class_device_create_file(cldev, &class_device_attr_periodic);
 792         retval = class_device_create_file(cldev, &class_device_attr_registers);
 793 }
 794
 795 static inline void remove_debug_files (struct ehci_hcd *ehci)
 796 {
 797         struct class_device *cldev = ehci_to_hcd(ehci)->self.class_dev;
 798
 799         class_device_remove_file(cldev, &class_device_attr_async);
 800         class_device_remove_file(cldev, &class_device_attr_periodic);
 801         class_device_remove_file(cldev, &class_device_attr_registers);
 802 }
 803
 804 #endif /* STUB_DEBUG_FILES */
 805