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";
 116         }
 117 }
 118
 119 /**
 120  * dwc3_gadget_hs_link_string - returns highspeed and below link name
 121  * @link_state: link state code
 122  */
 123 static inline const char *
 124 dwc3_gadget_hs_link_string(enum dwc3_link_state link_state)
 125 {
 126         switch (link_state) {
 127         case DWC3_LINK_STATE_U0:
 128                 return "On";
 129         case DWC3_LINK_STATE_U2:
 130                 return "Sleep";
 131         case DWC3_LINK_STATE_U3:
 132                 return "Suspend";
 133         case DWC3_LINK_STATE_SS_DIS:
 134                 return "Disconnected";
 135         case DWC3_LINK_STATE_RX_DET:
 136                 return "Early Suspend";
 137         case DWC3_LINK_STATE_RECOV:
 138                 return "Recovery";
 139         case DWC3_LINK_STATE_RESET:
 140                 return "Reset";
 141         case DWC3_LINK_STATE_RESUME:
 142                 return "Resume";
 143         default:
 144                 return "UNKNOWN link state";
 145         }
 146 }
 147
 148 /**
 149  * dwc3_trb_type_string - returns TRB type as a string
 150  * @type: the type of the TRB
 151  */
 152 static inline const char *dwc3_trb_type_string(unsigned int type)
 153 {
 154         switch (type) {
 155         case DWC3_TRBCTL_NORMAL:
 156                 return "normal";
 157         case DWC3_TRBCTL_CONTROL_SETUP:
 158                 return "setup";
 159         case DWC3_TRBCTL_CONTROL_STATUS2:
 160                 return "status2";
 161         case DWC3_TRBCTL_CONTROL_STATUS3:
 162                 return "status3";
 163         case DWC3_TRBCTL_CONTROL_DATA:
 164                 return "data";
 165         case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
 166                 return "isoc-first";
 167         case DWC3_TRBCTL_ISOCHRONOUS:
 168                 return "isoc";
 169         case DWC3_TRBCTL_LINK_TRB:
 170                 return "link";
 171         default:
 172                 return "UNKNOWN";
 173         }
 174 }
 175
 176 static inline const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
 177 {
 178         switch (state) {
 179         case EP0_UNCONNECTED:
 180                 return "Unconnected";
 181         case EP0_SETUP_PHASE:
 182                 return "Setup Phase";
 183         case EP0_DATA_PHASE:
 184                 return "Data Phase";
 185         case EP0_STATUS_PHASE:
 186                 return "Status Phase";
 187         default:
 188                 return "UNKNOWN";
 189         }
 190 }
 191
 192 /**
 193  * dwc3_gadget_event_string - returns event name
 194  * @event: the event code
 195  */
 196 static inline const char *dwc3_gadget_event_string(char *str, size_t size,
 197                 const struct dwc3_event_devt *event)
 198 {
 199         enum dwc3_link_state state = event->event_info & DWC3_LINK_STATE_MASK;
 200
 201         switch (event->type) {
 202         case DWC3_DEVICE_EVENT_DISCONNECT:
 203                 snprintf(str, size, "Disconnect: [%s]",
 204                                 dwc3_gadget_link_string(state));
 205                 break;
 206         case DWC3_DEVICE_EVENT_RESET:
 207                 snprintf(str, size, "Reset [%s]",
 208                                 dwc3_gadget_link_string(state));
 209                 break;
 210         case DWC3_DEVICE_EVENT_CONNECT_DONE:
 211                 snprintf(str, size, "Connection Done [%s]",
 212                                 dwc3_gadget_link_string(state));
 213                 break;
 214         case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 215                 snprintf(str, size, "Link Change [%s]",
 216                                 dwc3_gadget_link_string(state));
 217                 break;
 218         case DWC3_DEVICE_EVENT_WAKEUP:
 219                 snprintf(str, size, "WakeUp [%s]",
 220                                 dwc3_gadget_link_string(state));
 221                 break;
 222         case DWC3_DEVICE_EVENT_EOPF:
 223                 snprintf(str, size, "End-Of-Frame [%s]",
 224                                 dwc3_gadget_link_string(state));
 225                 break;
 226         case DWC3_DEVICE_EVENT_SOF:
 227                 snprintf(str, size, "Start-Of-Frame [%s]",
 228                                 dwc3_gadget_link_string(state));
 229                 break;
 230         case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 231                 snprintf(str, size, "Erratic Error [%s]",
 232                                 dwc3_gadget_link_string(state));
 233                 break;
 234         case DWC3_DEVICE_EVENT_CMD_CMPL:
 235                 snprintf(str, size, "Command Complete [%s]",
 236                                 dwc3_gadget_link_string(state));
 237                 break;
 238         case DWC3_DEVICE_EVENT_OVERFLOW:
 239                 snprintf(str, size, "Overflow [%s]",
 240                                 dwc3_gadget_link_string(state));
 241                 break;
 242         default:
 243                 snprintf(str, size, "UNKNOWN");
 244         }
 245
 246         return str;
 247 }
 248
 249 /**
 250  * dwc3_ep_event_string - returns event name
 251  * @event: then event code
 252  */
 253 static inline const char *dwc3_ep_event_string(char *str, size_t size,
 254                 const struct dwc3_event_depevt *event, u32 ep0state)
 255 {
 256         u8 epnum = event->endpoint_number;
 257         size_t len;
 258         int status;
 259
 260         len = scnprintf(str, size, "ep%d%s: ", epnum >> 1,
 261                         (epnum & 1) ? "in" : "out");
 262
 263         status = event->status;
 264
 265         switch (event->endpoint_event) {
 266         case DWC3_DEPEVT_XFERCOMPLETE:
 267                 len += scnprintf(str + len, size - len,
 268                                 "Transfer Complete (%c%c%c)",
 269                                 status & DEPEVT_STATUS_SHORT ? 'S' : 's',
 270                                 status & DEPEVT_STATUS_IOC ? 'I' : 'i',
 271                                 status & DEPEVT_STATUS_LST ? 'L' : 'l');
 272
 273                 if (epnum <= 1)
 274                         scnprintf(str + len, size - len, " [%s]",
 275                                         dwc3_ep0_state_string(ep0state));
 276                 break;
 277         case DWC3_DEPEVT_XFERINPROGRESS:
 278                 scnprintf(str + len, size - len,
 279                                 "Transfer In Progress [%d] (%c%c%c)",
 280                                 event->parameters,
 281                                 status & DEPEVT_STATUS_SHORT ? 'S' : 's',
 282                                 status & DEPEVT_STATUS_IOC ? 'I' : 'i',
 283                                 status & DEPEVT_STATUS_LST ? 'M' : 'm');
 284                 break;
 285         case DWC3_DEPEVT_XFERNOTREADY:
 286                 len += scnprintf(str + len, size - len,
 287                                 "Transfer Not Ready [%d]%s",
 288                                 event->parameters,
 289                                 status & DEPEVT_STATUS_TRANSFER_ACTIVE ?
 290                                 " (Active)" : " (Not Active)");
 291
 292                 /* Control Endpoints */
 293                 if (epnum <= 1) {
 294                         int phase = DEPEVT_STATUS_CONTROL_PHASE(event->status);
 295
 296                         switch (phase) {
 297                         case DEPEVT_STATUS_CONTROL_DATA:
 298                                 scnprintf(str + len, size - len,
 299                                                 " [Data Phase]");
 300                                 break;
 301                         case DEPEVT_STATUS_CONTROL_STATUS:
 302                                 scnprintf(str + len, size - len,
 303                                                 " [Status Phase]");
 304                         }
 305                 }
 306                 break;
 307         case DWC3_DEPEVT_RXTXFIFOEVT:
 308                 scnprintf(str + len, size - len, "FIFO");
 309                 break;
 310         case DWC3_DEPEVT_STREAMEVT:
 311                 status = event->status;
 312
 313                 switch (status) {
 314                 case DEPEVT_STREAMEVT_FOUND:
 315                         scnprintf(str + len, size - len, " Stream %d Found",
 316                                         event->parameters);
 317                         break;
 318                 case DEPEVT_STREAMEVT_NOTFOUND:
 319                 default:
 320                         scnprintf(str + len, size - len, " Stream Not Found");
 321                         break;
 322                 }
 323
 324                 break;
 325         case DWC3_DEPEVT_EPCMDCMPLT:
 326                 scnprintf(str + len, size - len, "Endpoint Command Complete");
 327                 break;
 328         default:
 329                 scnprintf(str + len, size - len, "UNKNOWN");
 330         }
 331
 332         return str;
 333 }
 334
 335 /**
 336  * dwc3_gadget_event_type_string - return event name
 337  * @event: the event code
 338  */
 339 static inline const char *dwc3_gadget_event_type_string(u8 event)
 340 {
 341         switch (event) {
 342         case DWC3_DEVICE_EVENT_DISCONNECT:
 343                 return "Disconnect";
 344         case DWC3_DEVICE_EVENT_RESET:
 345                 return "Reset";
 346         case DWC3_DEVICE_EVENT_CONNECT_DONE:
 347                 return "Connect Done";
 348         case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE:
 349                 return "Link Status Change";
 350         case DWC3_DEVICE_EVENT_WAKEUP:
 351                 return "Wake-Up";
 352         case DWC3_DEVICE_EVENT_HIBER_REQ:
 353                 return "Hibernation";
 354         case DWC3_DEVICE_EVENT_EOPF:
 355                 return "End of Periodic Frame";
 356         case DWC3_DEVICE_EVENT_SOF:
 357                 return "Start of Frame";
 358         case DWC3_DEVICE_EVENT_ERRATIC_ERROR:
 359                 return "Erratic Error";
 360         case DWC3_DEVICE_EVENT_CMD_CMPL:
 361                 return "Command Complete";
 362         case DWC3_DEVICE_EVENT_OVERFLOW:
 363                 return "Overflow";
 364         default:
 365                 return "UNKNOWN";
 366         }
 367 }
 368
 369 static inline const char *dwc3_decode_event(char *str, size_t size, u32 event,
 370                 u32 ep0state)
 371 {
 372         const union dwc3_event evt = (union dwc3_event) event;
 373
 374         if (evt.type.is_devspec)
 375                 return dwc3_gadget_event_string(str, size, &evt.devt);
 376         else
 377                 return dwc3_ep_event_string(str, size, &evt.depevt, ep0state);
 378 }
 379
 380 static inline const char *dwc3_ep_cmd_status_string(int status)
 381 {
 382         switch (status) {
 383         case -ETIMEDOUT:
 384                 return "Timed Out";
 385         case 0:
 386                 return "Successful";
 387         case DEPEVT_TRANSFER_NO_RESOURCE:
 388                 return "No Resource";
 389         case DEPEVT_TRANSFER_BUS_EXPIRY:
 390                 return "Bus Expiry";
 391         default:
 392                 return "UNKNOWN";
 393         }
 394 }
 395
 396 static inline const char *dwc3_gadget_generic_cmd_status_string(int status)
 397 {
 398         switch (status) {
 399         case -ETIMEDOUT:
 400                 return "Timed Out";
 401         case 0:
 402                 return "Successful";
 403         case 1:
 404                 return "Error";
 405         default:
 406                 return "UNKNOWN";
 407         }
 408 }
 409
 410
 411 #ifdef CONFIG_DEBUG_FS
 412 extern void dwc3_debugfs_init(struct dwc3 *);
 413 extern void dwc3_debugfs_exit(struct dwc3 *);
 414 #else
 415 static inline void dwc3_debugfs_init(struct dwc3 *d)
 416 {  }
 417 static inline void dwc3_debugfs_exit(struct dwc3 *d)
 418 {  }
 419 #endif
 420 #endif /* __DWC3_DEBUG_H */