drivers/usb/host/imx21-dbg.c

   1 /*
   2  * Copyright (c) 2009 by Martin Fuzzey
   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 imx21-hcd.c */
  20
  21 #ifndef DEBUG
  22
  23 static inline void create_debug_files(struct imx21 *imx21) { }
  24 static inline void remove_debug_files(struct imx21 *imx21) { }
  25 static inline void debug_urb_submitted(struct imx21 *imx21, struct urb *urb) {}
  26 static inline void debug_urb_completed(struct imx21 *imx21, struct urb *urb,
  27         int status) {}
  28 static inline void debug_urb_unlinked(struct imx21 *imx21, struct urb *urb) {}
  29 static inline void debug_urb_queued_for_etd(struct imx21 *imx21,
  30         struct urb *urb) {}
  31 static inline void debug_urb_queued_for_dmem(struct imx21 *imx21,
  32         struct urb *urb) {}
  33 static inline void debug_etd_allocated(struct imx21 *imx21) {}
  34 static inline void debug_etd_freed(struct imx21 *imx21) {}
  35 static inline void debug_dmem_allocated(struct imx21 *imx21, int size) {}
  36 static inline void debug_dmem_freed(struct imx21 *imx21, int size) {}
  37 static inline void debug_isoc_submitted(struct imx21 *imx21,
  38         int frame, struct td *td) {}
  39 static inline void debug_isoc_completed(struct imx21 *imx21,
  40         int frame, struct td *td, int cc, int len) {}
  41
  42 #else
  43
  44 #include <linux/debugfs.h>
  45 #include <linux/seq_file.h>
  46
  47 static const char *dir_labels[] = {
  48         "TD 0",
  49         "OUT",
  50         "IN",
  51         "TD 1"
  52 };
  53
  54 static const char *speed_labels[] = {
  55         "Full",
  56         "Low"
  57 };
  58
  59 static const char *format_labels[] = {
  60         "Control",
  61         "ISO",
  62         "Bulk",
  63         "Interrupt"
  64 };
  65
  66 static inline struct debug_stats *stats_for_urb(struct imx21 *imx21,
  67         struct urb *urb)
  68 {
  69         return usb_pipeisoc(urb->pipe) ?
  70                 &imx21->isoc_stats : &imx21->nonisoc_stats;
  71 }
  72
  73 static void debug_urb_submitted(struct imx21 *imx21, struct urb *urb)
  74 {
  75         stats_for_urb(imx21, urb)->submitted++;
  76 }
  77
  78 static void debug_urb_completed(struct imx21 *imx21, struct urb *urb, int st)
  79 {
  80         if (st)
  81                 stats_for_urb(imx21, urb)->completed_failed++;
  82         else
  83                 stats_for_urb(imx21, urb)->completed_ok++;
  84 }
  85
  86 static void debug_urb_unlinked(struct imx21 *imx21, struct urb *urb)
  87 {
  88         stats_for_urb(imx21, urb)->unlinked++;
  89 }
  90
  91 static void debug_urb_queued_for_etd(struct imx21 *imx21, struct urb *urb)
  92 {
  93         stats_for_urb(imx21, urb)->queue_etd++;
  94 }
  95
  96 static void debug_urb_queued_for_dmem(struct imx21 *imx21, struct urb *urb)
  97 {
  98         stats_for_urb(imx21, urb)->queue_dmem++;
  99 }
 100
 101 static inline void debug_etd_allocated(struct imx21 *imx21)
 102 {
 103         imx21->etd_usage.maximum = max(
 104                         ++(imx21->etd_usage.value),
 105                         imx21->etd_usage.maximum);
 106 }
 107
 108 static inline void debug_etd_freed(struct imx21 *imx21)
 109 {
 110         imx21->etd_usage.value--;
 111 }
 112
 113 static inline void debug_dmem_allocated(struct imx21 *imx21, int size)
 114 {
 115         imx21->dmem_usage.value += size;
 116         imx21->dmem_usage.maximum = max(
 117                         imx21->dmem_usage.value,
 118                         imx21->dmem_usage.maximum);
 119 }
 120
 121 static inline void debug_dmem_freed(struct imx21 *imx21, int size)
 122 {
 123         imx21->dmem_usage.value -= size;
 124 }
 125
 126
 127 static void debug_isoc_submitted(struct imx21 *imx21,
 128         int frame, struct td *td)
 129 {
 130         struct debug_isoc_trace *trace = &imx21->isoc_trace[
 131                 imx21->isoc_trace_index++];
 132
 133         imx21->isoc_trace_index %= ARRAY_SIZE(imx21->isoc_trace);
 134         trace->schedule_frame = td->frame;
 135         trace->submit_frame = frame;
 136         trace->request_len = td->len;
 137         trace->td = td;
 138 }
 139
 140 static inline void debug_isoc_completed(struct imx21 *imx21,
 141         int frame, struct td *td, int cc, int len)
 142 {
 143         struct debug_isoc_trace *trace, *trace_failed;
 144         int i;
 145         int found = 0;
 146
 147         trace = imx21->isoc_trace;
 148         for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace); i++, trace++) {
 149                 if (trace->td == td) {
 150                         trace->done_frame = frame;
 151                         trace->done_len = len;
 152                         trace->cc = cc;
 153                         trace->td = NULL;
 154                         found = 1;
 155                         break;
 156                 }
 157         }
 158
 159         if (found && cc) {
 160                 trace_failed = &imx21->isoc_trace_failed[
 161                                         imx21->isoc_trace_index_failed++];
 162
 163                 imx21->isoc_trace_index_failed %= ARRAY_SIZE(
 164                                                 imx21->isoc_trace_failed);
 165                 *trace_failed = *trace;
 166         }
 167 }
 168
 169
 170 static char *format_ep(struct usb_host_endpoint *ep, char *buf, int bufsize)
 171 {
 172         if (ep)
 173                 snprintf(buf, bufsize, "ep_%02x (type:%02X kaddr:%p)",
 174                         ep->desc.bEndpointAddress,
 175                         usb_endpoint_type(&ep->desc),
 176                         ep);
 177         else
 178                 snprintf(buf, bufsize, "none");
 179         return buf;
 180 }
 181
 182 static char *format_etd_dword0(u32 value, char *buf, int bufsize)
 183 {
 184         snprintf(buf, bufsize,
 185                 "addr=%d ep=%d dir=%s speed=%s format=%s halted=%d",
 186                 value & 0x7F,
 187                 (value >> DW0_ENDPNT) & 0x0F,
 188                 dir_labels[(value >> DW0_DIRECT) & 0x03],
 189                 speed_labels[(value >> DW0_SPEED) & 0x01],
 190                 format_labels[(value >> DW0_FORMAT) & 0x03],
 191                 (value >> DW0_HALTED) & 0x01);
 192         return buf;
 193 }
 194
 195 static int debug_status_show(struct seq_file *s, void *v)
 196 {
 197         struct imx21 *imx21 = s->private;
 198         int etds_allocated = 0;
 199         int etds_sw_busy = 0;
 200         int etds_hw_busy = 0;
 201         int dmem_blocks = 0;
 202         int queued_for_etd = 0;
 203         int queued_for_dmem = 0;
 204         unsigned int dmem_bytes = 0;
 205         int i;
 206         struct etd_priv *etd;
 207         u32 etd_enable_mask;
 208         unsigned long flags;
 209         struct imx21_dmem_area *dmem;
 210         struct ep_priv *ep_priv;
 211
 212         spin_lock_irqsave(&imx21->lock, flags);
 213
 214         etd_enable_mask = readl(imx21->regs + USBH_ETDENSET);
 215         for (i = 0, etd = imx21->etd; i < USB_NUM_ETD; i++, etd++) {
 216                 if (etd->alloc)
 217                         etds_allocated++;
 218                 if (etd->urb)
 219                         etds_sw_busy++;
 220                 if (etd_enable_mask & (1<<i))
 221                         etds_hw_busy++;
 222         }
 223
 224         list_for_each_entry(dmem, &imx21->dmem_list, list) {
 225                 dmem_bytes += dmem->size;
 226                 dmem_blocks++;
 227         }
 228
 229         list_for_each_entry(ep_priv, &imx21->queue_for_etd, queue)
 230                 queued_for_etd++;
 231
 232         list_for_each_entry(etd, &imx21->queue_for_dmem, queue)
 233                 queued_for_dmem++;
 234
 235         spin_unlock_irqrestore(&imx21->lock, flags);
 236
 237         seq_printf(s,
 238                 "Frame: %d\n"
 239                 "ETDs allocated: %d/%d (max=%d)\n"
 240                 "ETDs in use sw: %d\n"
 241                 "ETDs in use hw: %d\n"
 242                 "DMEM alocated: %d/%d (max=%d)\n"
 243                 "DMEM blocks: %d\n"
 244                 "Queued waiting for ETD: %d\n"
 245                 "Queued waiting for DMEM: %d\n",
 246                 readl(imx21->regs + USBH_FRMNUB) & 0xFFFF,
 247                 etds_allocated, USB_NUM_ETD, imx21->etd_usage.maximum,
 248                 etds_sw_busy,
 249                 etds_hw_busy,
 250                 dmem_bytes, DMEM_SIZE, imx21->dmem_usage.maximum,
 251                 dmem_blocks,
 252                 queued_for_etd,
 253                 queued_for_dmem);
 254
 255         return 0;
 256 }
 257
 258 static int debug_dmem_show(struct seq_file *s, void *v)
 259 {
 260         struct imx21 *imx21 = s->private;
 261         struct imx21_dmem_area *dmem;
 262         unsigned long flags;
 263         char ep_text[40];
 264
 265         spin_lock_irqsave(&imx21->lock, flags);
 266
 267         list_for_each_entry(dmem, &imx21->dmem_list, list)
 268                 seq_printf(s,
 269                         "%04X: size=0x%X "
 270                         "ep=%s\n",
 271                         dmem->offset, dmem->size,
 272                         format_ep(dmem->ep, ep_text, sizeof(ep_text)));
 273
 274         spin_unlock_irqrestore(&imx21->lock, flags);
 275
 276         return 0;
 277 }
 278
 279 static int debug_etd_show(struct seq_file *s, void *v)
 280 {
 281         struct imx21 *imx21 = s->private;
 282         struct etd_priv *etd;
 283         char buf[60];
 284         u32 dword;
 285         int i, j;
 286         unsigned long flags;
 287
 288         spin_lock_irqsave(&imx21->lock, flags);
 289
 290         for (i = 0, etd = imx21->etd; i < USB_NUM_ETD; i++, etd++) {
 291                 int state = -1;
 292                 struct urb_priv *urb_priv;
 293                 if (etd->urb) {
 294                         urb_priv = etd->urb->hcpriv;
 295                         if (urb_priv)
 296                                 state = urb_priv->state;
 297                 }
 298
 299                 seq_printf(s,
 300                         "etd_num: %d\n"
 301                         "ep: %s\n"
 302                         "alloc: %d\n"
 303                         "len: %d\n"
 304                         "busy sw: %d\n"
 305                         "busy hw: %d\n"
 306                         "urb state: %d\n"
 307                         "current urb: %p\n",
 308
 309                         i,
 310                         format_ep(etd->ep, buf, sizeof(buf)),
 311                         etd->alloc,
 312                         etd->len,
 313                         etd->urb != NULL,
 314                         (readl(imx21->regs + USBH_ETDENSET) & (1 << i)) > 0,
 315                         state,
 316                         etd->urb);
 317
 318                 for (j = 0; j < 4; j++) {
 319                         dword = etd_readl(imx21, i, j);
 320                         switch (j) {
 321                         case 0:
 322                                 format_etd_dword0(dword, buf, sizeof(buf));
 323                                 break;
 324                         case 2:
 325                                 snprintf(buf, sizeof(buf),
 326                                         "cc=0X%02X", dword >> DW2_COMPCODE);
 327                                 break;
 328                         default:
 329                                 *buf = 0;
 330                                 break;
 331                         }
 332                         seq_printf(s,
 333                                 "dword %d: submitted=%08X cur=%08X [%s]\n",
 334                                 j,
 335                                 etd->submitted_dwords[j],
 336                                 dword,
 337                                 buf);
 338                 }
 339                 seq_printf(s, "\n");
 340         }
 341
 342         spin_unlock_irqrestore(&imx21->lock, flags);
 343
 344         return 0;
 345 }
 346
 347 static void debug_statistics_show_one(struct seq_file *s,
 348         const char *name, struct debug_stats *stats)
 349 {
 350         seq_printf(s, "%s:\n"
 351                 "submitted URBs: %lu\n"
 352                 "completed OK: %lu\n"
 353                 "completed failed: %lu\n"
 354                 "unlinked: %lu\n"
 355                 "queued for ETD: %lu\n"
 356                 "queued for DMEM: %lu\n\n",
 357                 name,
 358                 stats->submitted,
 359                 stats->completed_ok,
 360                 stats->completed_failed,
 361                 stats->unlinked,
 362                 stats->queue_etd,
 363                 stats->queue_dmem);
 364 }
 365
 366 static int debug_statistics_show(struct seq_file *s, void *v)
 367 {
 368         struct imx21 *imx21 = s->private;
 369         unsigned long flags;
 370
 371         spin_lock_irqsave(&imx21->lock, flags);
 372
 373         debug_statistics_show_one(s, "nonisoc", &imx21->nonisoc_stats);
 374         debug_statistics_show_one(s, "isoc", &imx21->isoc_stats);
 375         seq_printf(s, "unblock kludge triggers: %lu\n", imx21->debug_unblocks);
 376         spin_unlock_irqrestore(&imx21->lock, flags);
 377
 378         return 0;
 379 }
 380
 381 static void debug_isoc_show_one(struct seq_file *s,
 382         const char *name, int index,    struct debug_isoc_trace *trace)
 383 {
 384         seq_printf(s, "%s %d:\n"
 385                 "cc=0X%02X\n"
 386                 "scheduled frame %d (%d)\n"
 387                 "submitted frame %d (%d)\n"
 388                 "completed frame %d (%d)\n"
 389                 "requested length=%d\n"
 390                 "completed length=%d\n\n",
 391                 name, index,
 392                 trace->cc,
 393                 trace->schedule_frame, trace->schedule_frame & 0xFFFF,
 394                 trace->submit_frame, trace->submit_frame & 0xFFFF,
 395                 trace->done_frame, trace->done_frame & 0xFFFF,
 396                 trace->request_len,
 397                 trace->done_len);
 398 }
 399
 400 static int debug_isoc_show(struct seq_file *s, void *v)
 401 {
 402         struct imx21 *imx21 = s->private;
 403         struct debug_isoc_trace *trace;
 404         unsigned long flags;
 405         int i;
 406
 407         spin_lock_irqsave(&imx21->lock, flags);
 408
 409         trace = imx21->isoc_trace_failed;
 410         for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace_failed); i++, trace++)
 411                 debug_isoc_show_one(s, "isoc failed", i, trace);
 412
 413         trace = imx21->isoc_trace;
 414         for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace); i++, trace++)
 415                 debug_isoc_show_one(s, "isoc", i, trace);
 416
 417         spin_unlock_irqrestore(&imx21->lock, flags);
 418
 419         return 0;
 420 }
 421
 422 static int debug_status_open(struct inode *inode, struct file *file)
 423 {
 424         return single_open(file, debug_status_show, inode->i_private);
 425 }
 426
 427 static int debug_dmem_open(struct inode *inode, struct file *file)
 428 {
 429         return single_open(file, debug_dmem_show, inode->i_private);
 430 }
 431
 432 static int debug_etd_open(struct inode *inode, struct file *file)
 433 {
 434         return single_open(file, debug_etd_show, inode->i_private);
 435 }
 436
 437 static int debug_statistics_open(struct inode *inode, struct file *file)
 438 {
 439         return single_open(file, debug_statistics_show, inode->i_private);
 440 }
 441
 442 static int debug_isoc_open(struct inode *inode, struct file *file)
 443 {
 444         return single_open(file, debug_isoc_show, inode->i_private);
 445 }
 446
 447 static const struct file_operations debug_status_fops = {
 448         .open = debug_status_open,
 449         .read = seq_read,
 450         .llseek = seq_lseek,
 451         .release = single_release,
 452 };
 453
 454 static const struct file_operations debug_dmem_fops = {
 455         .open = debug_dmem_open,
 456         .read = seq_read,
 457         .llseek = seq_lseek,
 458         .release = single_release,
 459 };
 460
 461 static const struct file_operations debug_etd_fops = {
 462         .open = debug_etd_open,
 463         .read = seq_read,
 464         .llseek = seq_lseek,
 465         .release = single_release,
 466 };
 467
 468 static const struct file_operations debug_statistics_fops = {
 469         .open = debug_statistics_open,
 470         .read = seq_read,
 471         .llseek = seq_lseek,
 472         .release = single_release,
 473 };
 474
 475 static const struct file_operations debug_isoc_fops = {
 476         .open = debug_isoc_open,
 477         .read = seq_read,
 478         .llseek = seq_lseek,
 479         .release = single_release,
 480 };
 481
 482 static void create_debug_files(struct imx21 *imx21)
 483 {
 484         imx21->debug_root = debugfs_create_dir(dev_name(imx21->dev), NULL);
 485         if (!imx21->debug_root)
 486                 goto failed_create_rootdir;
 487
 488         if (!debugfs_create_file("status", S_IRUGO,
 489                         imx21->debug_root, imx21, &debug_status_fops))
 490                 goto failed_create;
 491
 492         if (!debugfs_create_file("dmem", S_IRUGO,
 493                         imx21->debug_root, imx21, &debug_dmem_fops))
 494                 goto failed_create;
 495
 496         if (!debugfs_create_file("etd", S_IRUGO,
 497                         imx21->debug_root, imx21, &debug_etd_fops))
 498                 goto failed_create;
 499
 500         if (!debugfs_create_file("statistics", S_IRUGO,
 501                         imx21->debug_root, imx21, &debug_statistics_fops))
 502                 goto failed_create;
 503
 504         if (!debugfs_create_file("isoc", S_IRUGO,
 505                         imx21->debug_root, imx21, &debug_isoc_fops))
 506                 goto failed_create;
 507
 508         return;
 509
 510 failed_create:
 511         debugfs_remove_recursive(imx21->debug_root);
 512
 513 failed_create_rootdir:
 514         imx21->debug_root = NULL;
 515 }
 516
 517
 518 static void remove_debug_files(struct imx21 *imx21)
 519 {
 520         if (imx21->debug_root) {
 521                 debugfs_remove_recursive(imx21->debug_root);
 522                 imx21->debug_root = NULL;
 523         }
 524 }
 525
 526 #endif
 527