drivers/usb/dwc3/debug.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /**
   3  * debug.h - DesignWare USB3 DRD Controller Debug Header
   4  *
   5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
   6  *
   7  * Authors: Felipe Balbi <balbi@ti.com>,
   8  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   9  */
  10
  11 #ifndef __DWC3_DEBUG_H
  12 #define __DWC3_DEBUG_H
  13
  14 #include "core.h"
  15
  16 /**
  17  * dwc3_gadget_ep_cmd_string - returns endpoint command string
  18  * @cmd: command code
  19  */
  20 static inline const char *
  21 dwc3_gadget_ep_cmd_string(u8 cmd)
  22 {
  23         switch (cmd) {
  24         case DWC3_DEPCMD_DEPSTARTCFG:
  25                 return "Start New Configuration";
  26         case DWC3_DEPCMD_ENDTRANSFER:
  27                 return "End Transfer";
  28         case DWC3_DEPCMD_UPDATETRANSFER:
  29                 return "Update Transfer";
  30         case DWC3_DEPCMD_STARTTRANSFER:
  31                 return "Start Transfer";
  32         case DWC3_DEPCMD_CLEARSTALL:
  33                 return "Clear Stall";
  34         case DWC3_DEPCMD_SETSTALL:
  35                 return "Set Stall";
  36         case DWC3_DEPCMD_GETEPSTATE:
  37                 return "Get Endpoint State";
  38         case DWC3_DEPCMD_SETTRANSFRESOURCE:
  39                 return "Set Endpoint Transfer Resource";
  40         case DWC3_DEPCMD_SETEPCONFIG:
  41                 return "Set Endpoint Configuration";
  42         default:
  43                 return "UNKNOWN command";
  44         }
  45 }
  46
  47 /**
  48  * dwc3_gadget_generic_cmd_string - returns generic command string
  49  * @cmd: command code
  50  */
  51 static inline const char *
  52 dwc3_gadget_generic_cmd_string(u8 cmd)
  53 {
  54         switch (cmd) {
  55         case DWC3_DGCMD_SET_LMP:
  56                 return "Set LMP";
  57         case DWC3_DGCMD_SET_PERIODIC_PAR:
  58                 return "Set Periodic Parameters";
  59         case DWC3_DGCMD_XMIT_FUNCTION:
  60                 return "Transmit Function Wake Device Notification";
  61         case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO:
  62                 return "Set Scratchpad Buffer Array Address Lo";
  63         case DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI:
  64                 return "Set Scratchpad Buffer Array Address Hi";
  65         case DWC3_DGCMD_SELECTED_FIFO_FLUSH:
  66                 return "Selected FIFO Flush";
  67         case DWC3_DGCMD_ALL_FIFO_FLUSH:
  68                 return "All FIFO Flush";
  69         case DWC3_DGCMD_SET_ENDPOINT_NRDY:
  70                 return "Set Endpoint NRDY";
  71         case DWC3_DGCMD_RUN_SOC_BUS_LOOPBACK:
  72                 return "Run SoC Bus Loopback Test";
  73         default:
  74                 return "UNKNOWN";
  75         }
  76 }
  77
  78 /**
  79  * dwc3_gadget_link_string - returns link name
  80  * @link_state: link state code
  81  */
  82 static inline const char *
  83 dwc3_gadget_link_string(enum dwc3_link_state link_state)
  84 {
  85         switch (link_state) {
  86         case DWC3_LINK_STATE_U0:
  87                 return "U0";
  88         case DWC3_LINK_STATE_U1:
  89                 return "U1";
  90         case DWC3_LINK_STATE_U2:
  91                 return "U2";
  92         case DWC3_LINK_STATE_U3:
  93                 return "U3";
  94         case DWC3_LINK_STATE_SS_DIS:
  95                 return "SS.Disabled";
  96         case DWC3_LINK_STATE_RX_DET:
  97                 return "RX.Detect";
  98         case DWC3_LINK_STATE_SS_INACT:
  99                 return "SS.Inactive";
 100         case DWC3_LINK_STATE_POLL:
 101                 return "Polling";
 102         case DWC3_LINK_STATE_RECOV:
 103                 return "Recovery";
 104         case DWC3_LINK_STATE_HRESET:
 105                 return "Hot Reset";
 106         case DWC3_LINK_STATE_CMPLY:
 107                 return "Compliance";
 108         case DWC3_LINK_STATE_LPBK:
 109                 return "Loopback";
 110         case DWC3_LINK_STATE_RESET:
 111                 return "Reset";
 112         case DWC3_LINK_STATE_RESUME:
 113                 return "Resume";
 114         default:
 115                 return "UNKNOWN link state\n";
 116         }
 117 }
 118
 119 /**
 120  * dwc3_trb_type_string - returns TRB type as a string
 121  * @type: the type of the TRB
 122  */
 123 static inline const char *dwc3_trb_type_string(unsigned int type)
 124 {
 125         switch (type) {
 126         case DWC3_TRBCTL_NORMAL:
 127                 return "normal";
 128         case DWC3_TRBCTL_CONTROL_SETUP:
 129                 return "setup";
 130         case DWC3_TRBCTL_CONTROL_STATUS2:
 131                 return "status2";
 132         case DWC3_TRBCTL_CONTROL_STATUS3:
 133                 return "status3";
 134         case DWC3_TRBCTL_CONTROL_DATA:
 135                 return "data";
 136         case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
 137                 return "isoc-first";
 138         case DWC3_TRBCTL_ISOCHRONOUS:
 139                 return "isoc";
 140         case DWC3_TRBCTL_LINK_TRB:
 141                 return "link";
 142         default:
 143                 return "UNKNOWN";
 144         }
 145 }
 146
 147 static inline const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
 148 {
 149         switch (state) {
 150         case EP0_UNCONNECTED:
 151                 return "Unconnected";
 152         case EP0_SETUP_PHASE:
 153                 return "Setup Phase";
 154         case EP0_DATA_PHASE:
 155                 return "Data Phase";
 156         case EP0_STATUS_PHASE:
 157                 return "Status Phase";
 158         default:
 159                 return "UNKNOWN";
 160         }
 161 }
 162
 163 /**
 164  * dwc3_gadget_event_string - returns event name
 165  * @event: the event code
 166  */
 167 static inline const char *
 168 dwc3_gadget_event_string(char *str, const struct dwc3_event_devt *event)
 169 {
 170         enum dwc3_link_state state = event->event_info & DWC3_LINK_STATE_MASK;
 171
 172         switch (event->type) {
 173         case DWC3_DEVICE_EVENT_DISCONNECT:
 174                 sprintf(str, "Disconnect: [%s]",
 175                                 dwc3_gadget_link_string(state));
 176                 break;
 177         case DWC3_DEVICE_EVENT_RESET:
 178                 sprintf(str, "Reset [%s]", dwc3_gadget_link_string(state));
 179                 break;
 180         case DWC3_DEVICE_EVENT_CONNECT_DONE:
 181                 sprintf(str, "Connection Done [%s]",
 182                                 dwc3_gadget_link_string(state));
 183                 break;
 184         case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 185                 sprintf(str, "Link Change [%s]",
 186                                 dwc3_gadget_link_string(state));
 187                 break;
 188         case DWC3_DEVICE_EVENT_WAKEUP:
 189                 sprintf(str, "WakeUp [%s]", dwc3_gadget_link_string(state));
 190                 break;
 191         case DWC3_DEVICE_EVENT_EOPF:
 192                 sprintf(str, "End-Of-Frame [%s]",
 193                                 dwc3_gadget_link_string(state));
 194                 break;
 195         case DWC3_DEVICE_EVENT_SOF:
 196                 sprintf(str, "Start-Of-Frame [%s]",
 197                                 dwc3_gadget_link_string(state));
 198                 break;
 199         case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 200                 sprintf(str, "Erratic Error [%s]",
 201                                 dwc3_gadget_link_string(state));
 202                 break;
 203         case DWC3_DEVICE_EVENT_CMD_CMPL:
 204                 sprintf(str, "Command Complete [%s]",
 205                                 dwc3_gadget_link_string(state));
 206                 break;
 207         case DWC3_DEVICE_EVENT_OVERFLOW:
 208                 sprintf(str, "Overflow [%s]", dwc3_gadget_link_string(state));
 209                 break;
 210         default:
 211                 sprintf(str, "UNKNOWN");
 212         }
 213
 214         return str;
 215 }
 216
 217 static inline void dwc3_decode_get_status(__u8 t, __u16 i, __u16 l, char *str)
 218 {
 219         switch (t & USB_RECIP_MASK) {
 220         case USB_RECIP_INTERFACE:
 221                 sprintf(str, "Get Interface Status(Intf = %d, Length = %d)",
 222                         i, l);
 223                 break;
 224         case USB_RECIP_ENDPOINT:
 225                 sprintf(str, "Get Endpoint Status(ep%d%s)",
 226                         i & ~USB_DIR_IN,
 227                         i & USB_DIR_IN ? "in" : "out");
 228                 break;
 229         }
 230 }
 231
 232 static inline void dwc3_decode_set_clear_feature(__u8 t, __u8 b, __u16 v,
 233                                                  __u16 i, char *str)
 234 {
 235         switch (t & USB_RECIP_MASK) {
 236         case USB_RECIP_DEVICE:
 237                 sprintf(str, "%s Device Feature(%s%s)",
 238                         b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
 239                         ({char *s;
 240                                 switch (v) {
 241                                 case USB_DEVICE_SELF_POWERED:
 242                                         s = "Self Powered";
 243                                         break;
 244                                 case USB_DEVICE_REMOTE_WAKEUP:
 245                                         s = "Remote Wakeup";
 246                                         break;
 247                                 case USB_DEVICE_TEST_MODE:
 248                                         s = "Test Mode";
 249                                         break;
 250                                 case USB_DEVICE_U1_ENABLE:
 251                                         s = "U1 Enable";
 252                                         break;
 253                                 case USB_DEVICE_U2_ENABLE:
 254                                         s = "U2 Enable";
 255                                         break;
 256                                 case USB_DEVICE_LTM_ENABLE:
 257                                         s = "LTM Enable";
 258                                         break;
 259                                 default:
 260                                         s = "UNKNOWN";
 261                                 } s; }),
 262                         v == USB_DEVICE_TEST_MODE ?
 263                         ({ char *s;
 264                                 switch (i) {
 265                                 case TEST_J:
 266                                         s = ": TEST_J";
 267                                         break;
 268                                 case TEST_K:
 269                                         s = ": TEST_K";
 270                                         break;
 271                                 case TEST_SE0_NAK:
 272                                         s = ": TEST_SE0_NAK";
 273                                         break;
 274                                 case TEST_PACKET:
 275                                         s = ": TEST_PACKET";
 276                                         break;
 277                                 case TEST_FORCE_EN:
 278                                         s = ": TEST_FORCE_EN";
 279                                         break;
 280                                 default:
 281                                         s = ": UNKNOWN";
 282                                 } s; }) : "");
 283                 break;
 284         case USB_RECIP_INTERFACE:
 285                 sprintf(str, "%s Interface Feature(%s)",
 286                         b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
 287                         v == USB_INTRF_FUNC_SUSPEND ?
 288                         "Function Suspend" : "UNKNOWN");
 289                 break;
 290         case USB_RECIP_ENDPOINT:
 291                 sprintf(str, "%s Endpoint Feature(%s ep%d%s)",
 292                         b == USB_REQ_CLEAR_FEATURE ? "Clear" : "Set",
 293                         v == USB_ENDPOINT_HALT ? "Halt" : "UNKNOWN",
 294                         i & ~USB_DIR_IN,
 295                         i & USB_DIR_IN ? "in" : "out");
 296                 break;
 297         }
 298 }
 299
 300 static inline void dwc3_decode_set_address(__u16 v, char *str)
 301 {
 302         sprintf(str, "Set Address(Addr = %02x)", v);
 303 }
 304
 305 static inline void dwc3_decode_get_set_descriptor(__u8 t, __u8 b, __u16 v,
 306                                                   __u16 i, __u16 l, char *str)
 307 {
 308         sprintf(str, "%s %s Descriptor(Index = %d, Length = %d)",
 309                 b == USB_REQ_GET_DESCRIPTOR ? "Get" : "Set",
 310                 ({ char *s;
 311                         switch (v >> 8) {
 312                         case USB_DT_DEVICE:
 313                                 s = "Device";
 314                                 break;
 315                         case USB_DT_CONFIG:
 316                                 s = "Configuration";
 317                                 break;
 318                         case USB_DT_STRING:
 319                                 s = "String";
 320                                 break;
 321                         case USB_DT_INTERFACE:
 322                                 s = "Interface";
 323                                 break;
 324                         case USB_DT_ENDPOINT:
 325                                 s = "Endpoint";
 326                                 break;
 327                         case USB_DT_DEVICE_QUALIFIER:
 328                                 s = "Device Qualifier";
 329                                 break;
 330                         case USB_DT_OTHER_SPEED_CONFIG:
 331                                 s = "Other Speed Config";
 332                                 break;
 333                         case USB_DT_INTERFACE_POWER:
 334                                 s = "Interface Power";
 335                                 break;
 336                         case USB_DT_OTG:
 337                                 s = "OTG";
 338                                 break;
 339                         case USB_DT_DEBUG:
 340                                 s = "Debug";
 341                                 break;
 342                         case USB_DT_INTERFACE_ASSOCIATION:
 343                                 s = "Interface Association";
 344                                 break;
 345                         case USB_DT_BOS:
 346                                 s = "BOS";
 347                                 break;
 348                         case USB_DT_DEVICE_CAPABILITY:
 349                                 s = "Device Capability";
 350                                 break;
 351                         case USB_DT_PIPE_USAGE:
 352                                 s = "Pipe Usage";
 353                                 break;
 354                         case USB_DT_SS_ENDPOINT_COMP:
 355                                 s = "SS Endpoint Companion";
 356                                 break;
 357                         case USB_DT_SSP_ISOC_ENDPOINT_COMP:
 358                                 s = "SSP Isochronous Endpoint Companion";
 359                                 break;
 360                         default:
 361                                 s = "UNKNOWN";
 362                                 break;
 363                         } s; }), v & 0xff, l);
 364 }
 365
 366
 367 static inline void dwc3_decode_get_configuration(__u16 l, char *str)
 368 {
 369         sprintf(str, "Get Configuration(Length = %d)", l);
 370 }
 371
 372 static inline void dwc3_decode_set_configuration(__u8 v, char *str)
 373 {
 374         sprintf(str, "Set Configuration(Config = %d)", v);
 375 }
 376
 377 static inline void dwc3_decode_get_intf(__u16 i, __u16 l, char *str)
 378 {
 379         sprintf(str, "Get Interface(Intf = %d, Length = %d)", i, l);
 380 }
 381
 382 static inline void dwc3_decode_set_intf(__u8 v, __u16 i, char *str)
 383 {
 384         sprintf(str, "Set Interface(Intf = %d, Alt.Setting = %d)", i, v);
 385 }
 386
 387 static inline void dwc3_decode_synch_frame(__u16 i, __u16 l, char *str)
 388 {
 389         sprintf(str, "Synch Frame(Endpoint = %d, Length = %d)", i, l);
 390 }
 391
 392 static inline void dwc3_decode_set_sel(__u16 l, char *str)
 393 {
 394         sprintf(str, "Set SEL(Length = %d)", l);
 395 }
 396
 397 static inline void dwc3_decode_set_isoch_delay(__u8 v, char *str)
 398 {
 399         sprintf(str, "Set Isochronous Delay(Delay = %d ns)", v);
 400 }
 401
 402 /**
 403  * dwc3_decode_ctrl - returns a string represetion of ctrl request
 404  */
 405 static inline const char *dwc3_decode_ctrl(char *str, __u8 bRequestType,
 406                 __u8 bRequest, __u16 wValue, __u16 wIndex, __u16 wLength)
 407 {
 408         switch (bRequest) {
 409         case USB_REQ_GET_STATUS:
 410                 dwc3_decode_get_status(bRequestType, wIndex, wLength, str);
 411                 break;
 412         case USB_REQ_CLEAR_FEATURE:
 413         case USB_REQ_SET_FEATURE:
 414                 dwc3_decode_set_clear_feature(bRequestType, bRequest, wValue,
 415                                               wIndex, str);
 416                 break;
 417         case USB_REQ_SET_ADDRESS:
 418                 dwc3_decode_set_address(wValue, str);
 419                 break;
 420         case USB_REQ_GET_DESCRIPTOR:
 421         case USB_REQ_SET_DESCRIPTOR:
 422                 dwc3_decode_get_set_descriptor(bRequestType, bRequest, wValue,
 423                                                wIndex, wLength, str);
 424                 break;
 425         case USB_REQ_GET_CONFIGURATION:
 426                 dwc3_decode_get_configuration(wLength, str);
 427                 break;
 428         case USB_REQ_SET_CONFIGURATION:
 429                 dwc3_decode_set_configuration(wValue, str);
 430                 break;
 431         case USB_REQ_GET_INTERFACE:
 432                 dwc3_decode_get_intf(wIndex, wLength, str);
 433                 break;
 434         case USB_REQ_SET_INTERFACE:
 435                 dwc3_decode_set_intf(wValue, wIndex, str);
 436                 break;
 437         case USB_REQ_SYNCH_FRAME:
 438                 dwc3_decode_synch_frame(wIndex, wLength, str);
 439                 break;
 440         case USB_REQ_SET_SEL:
 441                 dwc3_decode_set_sel(wLength, str);
 442                 break;
 443         case USB_REQ_SET_ISOCH_DELAY:
 444                 dwc3_decode_set_isoch_delay(wValue, str);
 445                 break;
 446         default:
 447                 sprintf(str, "%02x %02x %02x %02x %02x %02x %02x %02x",
 448                         bRequestType, bRequest,
 449                         cpu_to_le16(wValue) & 0xff,
 450                         cpu_to_le16(wValue) >> 8,
 451                         cpu_to_le16(wIndex) & 0xff,
 452                         cpu_to_le16(wIndex) >> 8,
 453                         cpu_to_le16(wLength) & 0xff,
 454                         cpu_to_le16(wLength) >> 8);
 455         }
 456
 457         return str;
 458 }
 459
 460 /**
 461  * dwc3_ep_event_string - returns event name
 462  * @event: then event code
 463  */
 464 static inline const char *
 465 dwc3_ep_event_string(char *str, const struct dwc3_event_depevt *event,
 466                      u32 ep0state)
 467 {
 468         u8 epnum = event->endpoint_number;
 469         size_t len;
 470         int status;
 471         int ret;
 472
 473         ret = sprintf(str, "ep%d%s: ", epnum >> 1,
 474                         (epnum & 1) ? "in" : "out");
 475         if (ret < 0)
 476                 return "UNKNOWN";
 477
 478         status = event->status;
 479
 480         switch (event->endpoint_event) {
 481         case DWC3_DEPEVT_XFERCOMPLETE:
 482                 len = strlen(str);
 483                 sprintf(str + len, "Transfer Complete (%c%c%c)",
 484                                 status & DEPEVT_STATUS_SHORT ? 'S' : 's',
 485                                 status & DEPEVT_STATUS_IOC ? 'I' : 'i',
 486                                 status & DEPEVT_STATUS_LST ? 'L' : 'l');
 487
 488                 len = strlen(str);
 489
 490                 if (epnum <= 1)
 491                         sprintf(str + len, " [%s]", dwc3_ep0_state_string(ep0state));
 492                 break;
 493         case DWC3_DEPEVT_XFERINPROGRESS:
 494                 len = strlen(str);
 495
 496                 sprintf(str + len, "Transfer In Progress [%d] (%c%c%c)",
 497                                 event->parameters,
 498                                 status & DEPEVT_STATUS_SHORT ? 'S' : 's',
 499                                 status & DEPEVT_STATUS_IOC ? 'I' : 'i',
 500                                 status & DEPEVT_STATUS_LST ? 'M' : 'm');
 501                 break;
 502         case DWC3_DEPEVT_XFERNOTREADY:
 503                 len = strlen(str);
 504
 505                 sprintf(str + len, "Transfer Not Ready [%d]%s",
 506                                 event->parameters,
 507                                 status & DEPEVT_STATUS_TRANSFER_ACTIVE ?
 508                                 " (Active)" : " (Not Active)");
 509
 510                 /* Control Endpoints */
 511                 if (epnum <= 1) {
 512                         int phase = DEPEVT_STATUS_CONTROL_PHASE(event->status);
 513
 514                         switch (phase) {
 515                         case DEPEVT_STATUS_CONTROL_DATA:
 516                                 strcat(str, " [Data Phase]");
 517                                 break;
 518                         case DEPEVT_STATUS_CONTROL_STATUS:
 519                                 strcat(str, " [Status Phase]");
 520                         }
 521                 }
 522                 break;
 523         case DWC3_DEPEVT_RXTXFIFOEVT:
 524                 strcat(str, "FIFO");
 525                 break;
 526         case DWC3_DEPEVT_STREAMEVT:
 527                 status = event->status;
 528
 529                 switch (status) {
 530                 case DEPEVT_STREAMEVT_FOUND:
 531                         sprintf(str + ret, " Stream %d Found",
 532                                         event->parameters);
 533                         break;
 534                 case DEPEVT_STREAMEVT_NOTFOUND:
 535                 default:
 536                         strcat(str, " Stream Not Found");
 537                         break;
 538                 }
 539
 540                 break;
 541         case DWC3_DEPEVT_EPCMDCMPLT:
 542                 strcat(str, "Endpoint Command Complete");
 543                 break;
 544         default:
 545                 sprintf(str, "UNKNOWN");
 546         }
 547
 548         return str;
 549 }
 550
 551 /**
 552  * dwc3_gadget_event_type_string - return event name
 553  * @event: the event code
 554  */
 555 static inline const char *dwc3_gadget_event_type_string(u8 event)
 556 {
 557         switch (event) {
 558         case DWC3_DEVICE_EVENT_DISCONNECT:
 559                 return "Disconnect";
 560         case DWC3_DEVICE_EVENT_RESET:
 561                 return "Reset";
 562         case DWC3_DEVICE_EVENT_CONNECT_DONE:
 563                 return "Connect Done";
 564         case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 565                 return "Link Status Change";
 566         case DWC3_DEVICE_EVENT_WAKEUP:
 567                 return "Wake-Up";
 568         case DWC3_DEVICE_EVENT_HIBER_REQ:
 569                 return "Hibernation";
 570         case DWC3_DEVICE_EVENT_EOPF:
 571                 return "End of Periodic Frame";
 572         case DWC3_DEVICE_EVENT_SOF:
 573                 return "Start of Frame";
 574         case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 575                 return "Erratic Error";
 576         case DWC3_DEVICE_EVENT_CMD_CMPL:
 577                 return "Command Complete";
 578         case DWC3_DEVICE_EVENT_OVERFLOW:
 579                 return "Overflow";
 580         default:
 581                 return "UNKNOWN";
 582         }
 583 }
 584
 585 static inline const char *dwc3_decode_event(char *str, u32 event, u32 ep0state)
 586 {
 587         const union dwc3_event evt = (union dwc3_event) event;
 588
 589         if (evt.type.is_devspec)
 590                 return dwc3_gadget_event_string(str, &evt.devt);
 591         else
 592                 return dwc3_ep_event_string(str, &evt.depevt, ep0state);
 593 }
 594
 595 static inline const char *dwc3_ep_cmd_status_string(int status)
 596 {
 597         switch (status) {
 598         case -ETIMEDOUT:
 599                 return "Timed Out";
 600         case 0:
 601                 return "Successful";
 602         case DEPEVT_TRANSFER_NO_RESOURCE:
 603                 return "No Resource";
 604         case DEPEVT_TRANSFER_BUS_EXPIRY:
 605                 return "Bus Expiry";
 606         default:
 607                 return "UNKNOWN";
 608         }
 609 }
 610
 611 static inline const char *dwc3_gadget_generic_cmd_status_string(int status)
 612 {
 613         switch (status) {
 614         case -ETIMEDOUT:
 615                 return "Timed Out";
 616         case 0:
 617                 return "Successful";
 618         case 1:
 619                 return "Error";
 620         default:
 621                 return "UNKNOWN";
 622         }
 623 }
 624
 625
 626 #ifdef CONFIG_DEBUG_FS
 627 extern void dwc3_debugfs_init(struct dwc3 *);
 628 extern void dwc3_debugfs_exit(struct dwc3 *);
 629 #else
 630 static inline void dwc3_debugfs_init(struct dwc3 *d)
 631 {  }
 632 static inline void dwc3_debugfs_exit(struct dwc3 *d)
 633 {  }
 634 #endif
 635 #endif /* __DWC3_DEBUG_H */