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)->hcd.self.controller , fmt , ## args )
  23 #define ehci_err(ehci, fmt, args...) \
  24         dev_err ((ehci)->hcd.self.controller , fmt , ## args )
  25 #define ehci_info(ehci, fmt, args...) \
  26         dev_info ((ehci)->hcd.self.controller , fmt , ## args )
  27 #define ehci_warn(ehci, fmt, args...) \
  28         dev_warn ((ehci)->hcd.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                 cpu_to_le32p (&qtd->hw_next),
 123                 cpu_to_le32p (&qtd->hw_alt_next),
 124                 cpu_to_le32p (&qtd->hw_token),
 125                 cpu_to_le32p (&qtd->hw_buf [0]));
 126         if (qtd->hw_buf [1])
 127                 ehci_dbg (ehci, "  p1=%08x p2=%08x p3=%08x p4=%08x\n",
 128                         cpu_to_le32p (&qtd->hw_buf [1]),
 129                         cpu_to_le32p (&qtd->hw_buf [2]),
 130                         cpu_to_le32p (&qtd->hw_buf [3]),
 131                         cpu_to_le32p (&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, 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, 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 dbg_command_buf (char *buf, unsigned len, char *label, u32 command)
 225 {
 226         return scnprintf (buf, len,
 227                 "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s",
 228                 label, label [0] ? " " : "", command,
 229                 (command & CMD_PARK) ? "park" : "(park)",
 230                 CMD_PARK_CNT (command),
 231                 (command >> 16) & 0x3f,
 232                 (command & CMD_LRESET) ? " LReset" : "",
 233                 (command & CMD_IAAD) ? " IAAD" : "",
 234                 (command & CMD_ASE) ? " Async" : "",
 235                 (command & CMD_PSE) ? " Periodic" : "",
 236                 fls_strings [(command >> 2) & 0x3],
 237                 (command & CMD_RESET) ? " Reset" : "",
 238                 (command & CMD_RUN) ? "RUN" : "HALT"
 239                 );
 240 }
 241
 242 static int
 243 dbg_port_buf (char *buf, unsigned len, char *label, int port, u32 status)
 244 {
 245         char    *sig;
 246
 247         /* signaling state */
 248         switch (status & (3 << 10)) {
 249         case 0 << 10: sig = "se0"; break;
 250         case 1 << 10: sig = "k"; break;         /* low speed */
 251         case 2 << 10: sig = "j"; break;
 252         default: sig = "?"; break;
 253         }
 254
 255         return scnprintf (buf, len,
 256                 "%s%sport %d status %06x%s%s sig=%s %s%s%s%s%s%s%s%s%s",
 257                 label, label [0] ? " " : "", port, status,
 258                 (status & PORT_POWER) ? " POWER" : "",
 259                 (status & PORT_OWNER) ? " OWNER" : "",
 260                 sig,
 261                 (status & PORT_RESET) ? " RESET" : "",
 262                 (status & PORT_SUSPEND) ? " SUSPEND" : "",
 263                 (status & PORT_RESUME) ? " RESUME" : "",
 264                 (status & PORT_OCC) ? " OCC" : "",
 265                 (status & PORT_OC) ? " OC" : "",
 266                 (status & PORT_PEC) ? " PEC" : "",
 267                 (status & PORT_PE) ? " PE" : "",
 268                 (status & PORT_CSC) ? " CSC" : "",
 269                 (status & PORT_CONNECT) ? " CONNECT" : ""
 270             );
 271 }
 272
 273 #else
 274 static inline void __attribute__((__unused__))
 275 dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh)
 276 {}
 277
 278 static inline int __attribute__((__unused__))
 279 dbg_status_buf (char *buf, unsigned len, char *label, u32 status)
 280 { return 0; }
 281
 282 static inline int __attribute__((__unused__))
 283 dbg_command_buf (char *buf, unsigned len, char *label, u32 command)
 284 { return 0; }
 285
 286 static inline int __attribute__((__unused__))
 287 dbg_intr_buf (char *buf, unsigned len, char *label, u32 enable)
 288 { return 0; }
 289
 290 static inline int __attribute__((__unused__))
 291 dbg_port_buf (char *buf, unsigned len, char *label, int port, u32 status)
 292 { return 0; }
 293
 294 #endif  /* DEBUG */
 295
 296 /* functions have the "wrong" filename when they're output... */
 297 #define dbg_status(ehci, label, status) { \
 298         char _buf [80]; \
 299         dbg_status_buf (_buf, sizeof _buf, label, status); \
 300         ehci_dbg (ehci, "%s\n", _buf); \
 301 }
 302
 303 #define dbg_cmd(ehci, label, command) { \
 304         char _buf [80]; \
 305         dbg_command_buf (_buf, sizeof _buf, label, command); \
 306         ehci_dbg (ehci, "%s\n", _buf); \
 307 }
 308
 309 #define dbg_port(ehci, label, port, status) { \
 310         char _buf [80]; \
 311         dbg_port_buf (_buf, sizeof _buf, label, port, status); \
 312         ehci_dbg (ehci, "%s\n", _buf); \
 313 }
 314
 315 /*-------------------------------------------------------------------------*/
 316
 317 #ifdef STUB_DEBUG_FILES
 318
 319 static inline void create_debug_files (struct ehci_hcd *bus) { }
 320 static inline void remove_debug_files (struct ehci_hcd *bus) { }
 321
 322 #else
 323
 324 /* troubleshooting help: expose state in driverfs */
 325
 326 #define speed_char(info1) ({ char tmp; \
 327                 switch (info1 & (3 << 12)) { \
 328                 case 0 << 12: tmp = 'f'; break; \
 329                 case 1 << 12: tmp = 'l'; break; \
 330                 case 2 << 12: tmp = 'h'; break; \
 331                 default: tmp = '?'; break; \
 332                 }; tmp; })
 333
 334 static inline char token_mark (u32 token)
 335 {
 336         token = le32_to_cpu (token);
 337         if (token & QTD_STS_ACTIVE)
 338                 return '*';
 339         if (token & QTD_STS_HALT)
 340                 return '-';
 341         if (!IS_SHORT_READ (token))
 342                 return ' ';
 343         /* tries to advance through hw_alt_next */
 344         return '/';
 345 }
 346
 347 static void qh_lines (
 348         struct ehci_hcd *ehci,
 349         struct ehci_qh *qh,
 350         char **nextp,
 351         unsigned *sizep
 352 )
 353 {
 354         u32                     scratch;
 355         u32                     hw_curr;
 356         struct list_head        *entry;
 357         struct ehci_qtd         *td;
 358         unsigned                temp;
 359         unsigned                size = *sizep;
 360         char                    *next = *nextp;
 361         char                    mark;
 362
 363         if (qh->hw_qtd_next == EHCI_LIST_END)   /* NEC does this */
 364                 mark = '@';
 365         else
 366                 mark = token_mark (qh->hw_token);
 367         if (mark == '/') {      /* qh_alt_next controls qh advance? */
 368                 if ((qh->hw_alt_next & QTD_MASK) == ehci->async->hw_alt_next)
 369                         mark = '#';     /* blocked */
 370                 else if (qh->hw_alt_next == EHCI_LIST_END)
 371                         mark = '.';     /* use hw_qtd_next */
 372                 /* else alt_next points to some other qtd */
 373         }
 374         scratch = cpu_to_le32p (&qh->hw_info1);
 375         hw_curr = (mark == '*') ? cpu_to_le32p (&qh->hw_current) : 0;
 376         temp = scnprintf (next, size,
 377                         "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",
 378                         qh, scratch & 0x007f,
 379                         speed_char (scratch),
 380                         (scratch >> 8) & 0x000f,
 381                         scratch, cpu_to_le32p (&qh->hw_info2),
 382                         cpu_to_le32p (&qh->hw_token), mark,
 383                         (__constant_cpu_to_le32 (QTD_TOGGLE) & qh->hw_token)
 384                                 ? "data1" : "data0",
 385                         (cpu_to_le32p (&qh->hw_alt_next) >> 1) & 0x0f);
 386         size -= temp;
 387         next += temp;
 388
 389         /* hc may be modifying the list as we read it ... */
 390         list_for_each (entry, &qh->qtd_list) {
 391                 td = list_entry (entry, struct ehci_qtd, qtd_list);
 392                 scratch = cpu_to_le32p (&td->hw_token);
 393                 mark = ' ';
 394                 if (hw_curr == td->qtd_dma)
 395                         mark = '*';
 396                 else if (qh->hw_qtd_next == td->qtd_dma)
 397                         mark = '+';
 398                 else if (QTD_LENGTH (scratch)) {
 399                         if (td->hw_alt_next == ehci->async->hw_alt_next)
 400                                 mark = '#';
 401                         else if (td->hw_alt_next != EHCI_LIST_END)
 402                                 mark = '/';
 403                 }
 404                 temp = snprintf (next, size,
 405                                 "\n\t%p%c%s len=%d %08x urb %p",
 406                                 td, mark, ({ char *tmp;
 407                                  switch ((scratch>>8)&0x03) {
 408                                  case 0: tmp = "out"; break;
 409                                  case 1: tmp = "in"; break;
 410                                  case 2: tmp = "setup"; break;
 411                                  default: tmp = "?"; break;
 412                                  } tmp;}),
 413                                 (scratch >> 16) & 0x7fff,
 414                                 scratch,
 415                                 td->urb);
 416                 if (temp < 0)
 417                         temp = 0;
 418                 else if (size < temp)
 419                         temp = size;
 420                 size -= temp;
 421                 next += temp;
 422                 if (temp == size)
 423                         goto done;
 424         }
 425
 426         temp = snprintf (next, size, "\n");
 427         if (temp < 0)
 428                 temp = 0;
 429         else if (size < temp)
 430                 temp = size;
 431         size -= temp;
 432         next += temp;
 433
 434 done:
 435         *sizep = size;
 436         *nextp = next;
 437 }
 438
 439 static ssize_t
 440 show_async (struct class_device *class_dev, char *buf)
 441 {
 442         struct usb_bus          *bus;
 443         struct usb_hcd          *hcd;
 444         struct ehci_hcd         *ehci;
 445         unsigned long           flags;
 446         unsigned                temp, size;
 447         char                    *next;
 448         struct ehci_qh          *qh;
 449
 450         *buf = 0;
 451
 452         bus = to_usb_bus(class_dev);
 453         hcd = bus->hcpriv;
 454         ehci = hcd_to_ehci (hcd);
 455         next = buf;
 456         size = PAGE_SIZE;
 457
 458         /* dumps a snapshot of the async schedule.
 459          * usually empty except for long-term bulk reads, or head.
 460          * one QH per line, and TDs we know about
 461          */
 462         spin_lock_irqsave (&ehci->lock, flags);
 463         for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh)
 464                 qh_lines (ehci, qh, &next, &size);
 465         if (ehci->reclaim && size > 0) {
 466                 temp = scnprintf (next, size, "\nreclaim =\n");
 467                 size -= temp;
 468                 next += temp;
 469
 470                 for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim)
 471                         qh_lines (ehci, qh, &next, &size);
 472         }
 473         spin_unlock_irqrestore (&ehci->lock, flags);
 474
 475         return strlen (buf);
 476 }
 477 static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
 478
 479 #define DBG_SCHED_LIMIT 64
 480
 481 static ssize_t
 482 show_periodic (struct class_device *class_dev, char *buf)
 483 {
 484         struct usb_bus          *bus;
 485         struct usb_hcd          *hcd;
 486         struct ehci_hcd         *ehci;
 487         unsigned long           flags;
 488         union ehci_shadow       p, *seen;
 489         unsigned                temp, size, seen_count;
 490         char                    *next;
 491         unsigned                i, tag;
 492
 493         if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, SLAB_ATOMIC)))
 494                 return 0;
 495         seen_count = 0;
 496
 497         bus = to_usb_bus(class_dev);
 498         hcd = bus->hcpriv;
 499         ehci = hcd_to_ehci (hcd);
 500         next = buf;
 501         size = PAGE_SIZE;
 502
 503         temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size);
 504         size -= temp;
 505         next += temp;
 506
 507         /* dump a snapshot of the periodic schedule.
 508          * iso changes, interrupt usually doesn't.
 509          */
 510         spin_lock_irqsave (&ehci->lock, flags);
 511         for (i = 0; i < ehci->periodic_size; i++) {
 512                 p = ehci->pshadow [i];
 513                 if (likely (!p.ptr))
 514                         continue;
 515                 tag = Q_NEXT_TYPE (ehci->periodic [i]);
 516
 517                 temp = scnprintf (next, size, "%4d: ", i);
 518                 size -= temp;
 519                 next += temp;
 520
 521                 do {
 522                         switch (tag) {
 523                         case Q_TYPE_QH:
 524                                 temp = scnprintf (next, size, " qh%d-%04x/%p",
 525                                                 p.qh->period,
 526                                                 le32_to_cpup (&p.qh->hw_info2)
 527                                                         /* uframe masks */
 528                                                         & 0xffff,
 529                                                 p.qh);
 530                                 size -= temp;
 531                                 next += temp;
 532                                 /* don't repeat what follows this qh */
 533                                 for (temp = 0; temp < seen_count; temp++) {
 534                                         if (seen [temp].ptr != p.ptr)
 535                                                 continue;
 536                                         if (p.qh->qh_next.ptr)
 537                                                 temp = scnprintf (next, size,
 538                                                         " ...");
 539                                         p.ptr = 0;
 540                                         break;
 541                                 }
 542                                 /* show more info the first time around */
 543                                 if (temp == seen_count && p.ptr) {
 544                                         u32     scratch = cpu_to_le32p (
 545                                                         &p.qh->hw_info1);
 546                                         struct ehci_qtd *qtd;
 547                                         char            *type = "";
 548
 549                                         /* count tds, get ep direction */
 550                                         temp = 0;
 551                                         list_for_each_entry (qtd,
 552                                                         &p.qh->qtd_list,
 553                                                         qtd_list) {
 554                                                 temp++;
 555                                                 switch (0x03 & (le32_to_cpu (
 556                                                         qtd->hw_token) >> 8)) {
 557                                                 case 0: type = "out"; continue;
 558                                                 case 1: type = "in"; continue;
 559                                                 }
 560                                         }
 561
 562                                         temp = scnprintf (next, size,
 563                                                 " (%c%d ep%d%s "
 564                                                 "[%d/%d] q%d p%d)",
 565                                                 speed_char (scratch),
 566                                                 scratch & 0x007f,
 567                                                 (scratch >> 8) & 0x000f, type,
 568                                                 p.qh->usecs, p.qh->c_usecs,
 569                                                 temp,
 570                                                 0x7ff & (scratch >> 16));
 571
 572                                         if (seen_count < DBG_SCHED_LIMIT)
 573                                                 seen [seen_count++].qh = p.qh;
 574                                 } else
 575                                         temp = 0;
 576                                 if (p.qh) {
 577                                         tag = Q_NEXT_TYPE (p.qh->hw_next);
 578                                         p = p.qh->qh_next;
 579                                 }
 580                                 break;
 581                         case Q_TYPE_FSTN:
 582                                 temp = scnprintf (next, size,
 583                                         " fstn-%8x/%p", p.fstn->hw_prev,
 584                                         p.fstn);
 585                                 tag = Q_NEXT_TYPE (p.fstn->hw_next);
 586                                 p = p.fstn->fstn_next;
 587                                 break;
 588                         case Q_TYPE_ITD:
 589                                 temp = scnprintf (next, size,
 590                                         " itd/%p", p.itd);
 591                                 tag = Q_NEXT_TYPE (p.itd->hw_next);
 592                                 p = p.itd->itd_next;
 593                                 break;
 594                         case Q_TYPE_SITD:
 595                                 temp = scnprintf (next, size,
 596                                         " sitd%d-%04x/%p",
 597                                         p.sitd->stream->interval,
 598                                         le32_to_cpup (&p.sitd->hw_uframe)
 599                                                 & 0x0000ffff,
 600                                         p.sitd);
 601                                 tag = Q_NEXT_TYPE (p.sitd->hw_next);
 602                                 p = p.sitd->sitd_next;
 603                                 break;
 604                         }
 605                         size -= temp;
 606                         next += temp;
 607                 } while (p.ptr);
 608
 609                 temp = scnprintf (next, size, "\n");
 610                 size -= temp;
 611                 next += temp;
 612         }
 613         spin_unlock_irqrestore (&ehci->lock, flags);
 614         kfree (seen);
 615
 616         return PAGE_SIZE - size;
 617 }
 618 static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
 619
 620 #undef DBG_SCHED_LIMIT
 621
 622 static ssize_t
 623 show_registers (struct class_device *class_dev, char *buf)
 624 {
 625         struct usb_bus          *bus;
 626         struct usb_hcd          *hcd;
 627         struct ehci_hcd         *ehci;
 628         unsigned long           flags;
 629         unsigned                temp, size, i;
 630         char                    *next, scratch [80];
 631         static char             fmt [] = "%*s\n";
 632         static char             label [] = "";
 633
 634         bus = to_usb_bus(class_dev);
 635         hcd = bus->hcpriv;
 636         ehci = hcd_to_ehci (hcd);
 637         next = buf;
 638         size = PAGE_SIZE;
 639
 640         spin_lock_irqsave (&ehci->lock, flags);
 641
 642         if (bus->controller->power.power_state) {
 643                 size = scnprintf (next, size,
 644                         "bus %s, device %s (driver " DRIVER_VERSION ")\n"
 645                         "SUSPENDED (no register access)\n",
 646                         hcd->self.controller->bus->name,
 647                         hcd->self.controller->bus_id);
 648                 goto done;
 649         }
 650
 651         /* Capability Registers */
 652         i = HC_VERSION(readl (&ehci->caps->hc_capbase));
 653         temp = scnprintf (next, size,
 654                 "bus %s, device %s (driver " DRIVER_VERSION ")\n"
 655                 "EHCI %x.%02x, hcd state %d\n",
 656                 hcd->self.controller->bus->name,
 657                 hcd->self.controller->bus_id,
 658                 i >> 8, i & 0x0ff, ehci->hcd.state);
 659         size -= temp;
 660         next += temp;
 661
 662         // FIXME interpret both types of params
 663         i = readl (&ehci->caps->hcs_params);
 664         temp = scnprintf (next, size, "structural params 0x%08x\n", i);
 665         size -= temp;
 666         next += temp;
 667
 668         i = readl (&ehci->caps->hcc_params);
 669         temp = scnprintf (next, size, "capability params 0x%08x\n", i);
 670         size -= temp;
 671         next += temp;
 672
 673         /* Operational Registers */
 674         temp = dbg_status_buf (scratch, sizeof scratch, label,
 675                         readl (&ehci->regs->status));
 676         temp = scnprintf (next, size, fmt, temp, scratch);
 677         size -= temp;
 678         next += temp;
 679
 680         temp = dbg_command_buf (scratch, sizeof scratch, label,
 681                         readl (&ehci->regs->command));
 682         temp = scnprintf (next, size, fmt, temp, scratch);
 683         size -= temp;
 684         next += temp;
 685
 686         temp = dbg_intr_buf (scratch, sizeof scratch, label,
 687                         readl (&ehci->regs->intr_enable));
 688         temp = scnprintf (next, size, fmt, temp, scratch);
 689         size -= temp;
 690         next += temp;
 691
 692         temp = scnprintf (next, size, "uframe %04x\n",
 693                         readl (&ehci->regs->frame_index));
 694         size -= temp;
 695         next += temp;
 696
 697         for (i = 0; i < HCS_N_PORTS (ehci->hcs_params); i++) {
 698                 temp = dbg_port_buf (scratch, sizeof scratch, label, i + 1,
 699                                 readl (&ehci->regs->port_status [i]));
 700                 temp = scnprintf (next, size, fmt, temp, scratch);
 701                 size -= temp;
 702                 next += temp;
 703         }
 704
 705         if (ehci->reclaim) {
 706                 temp = scnprintf (next, size, "reclaim qh %p%s\n",
 707                                 ehci->reclaim,
 708                                 ehci->reclaim_ready ? " ready" : "");
 709                 size -= temp;
 710                 next += temp;
 711         }
 712
 713 #ifdef EHCI_STATS
 714         temp = scnprintf (next, size,
 715                 "irq normal %ld err %ld reclaim %ld (lost %ld)\n",
 716                 ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim,
 717                 ehci->stats.lost_iaa);
 718         size -= temp;
 719         next += temp;
 720
 721         temp = scnprintf (next, size, "complete %ld unlink %ld\n",
 722                 ehci->stats.complete, ehci->stats.unlink);
 723         size -= temp;
 724         next += temp;
 725 #endif
 726
 727 done:
 728         spin_unlock_irqrestore (&ehci->lock, flags);
 729
 730         return PAGE_SIZE - size;
 731 }
 732 static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
 733
 734 static inline void create_debug_files (struct ehci_hcd *bus)
 735 {
 736         class_device_create_file(&bus->hcd.self.class_dev, &class_device_attr_async);
 737         class_device_create_file(&bus->hcd.self.class_dev, &class_device_attr_periodic);
 738         class_device_create_file(&bus->hcd.self.class_dev, &class_device_attr_registers);
 739 }
 740
 741 static inline void remove_debug_files (struct ehci_hcd *bus)
 742 {
 743         class_device_remove_file(&bus->hcd.self.class_dev, &class_device_attr_async);
 744         class_device_remove_file(&bus->hcd.self.class_dev, &class_device_attr_periodic);
 745         class_device_remove_file(&bus->hcd.self.class_dev, &class_device_attr_registers);
 746 }
 747
 748 #endif /* STUB_DEBUG_FILES */
 749