drivers/usb/dwc3/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /**
   3  * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
   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 #include <linux/kernel.h>
  12 #include <linux/slab.h>
  13 #include <linux/ptrace.h>
  14 #include <linux/types.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/debugfs.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/delay.h>
  19 #include <linux/uaccess.h>
  20
  21 #include <linux/usb/ch9.h>
  22
  23 #include "core.h"
  24 #include "gadget.h"
  25 #include "io.h"
  26 #include "debug.h"
  27
  28 #define dump_register(nm)                               \
  29 {                                                       \
  30         .name   = __stringify(nm),                      \
  31         .offset = DWC3_ ##nm,                           \
  32 }
  33
  34 #define dump_ep_register_set(n)                 \
  35         {                                       \
  36                 .name = "DEPCMDPAR2("__stringify(n)")", \
  37                 .offset = DWC3_DEP_BASE(n) +    \
  38                         DWC3_DEPCMDPAR2,        \
  39         },                                      \
  40         {                                       \
  41                 .name = "DEPCMDPAR1("__stringify(n)")", \
  42                 .offset = DWC3_DEP_BASE(n) +    \
  43                         DWC3_DEPCMDPAR1,        \
  44         },                                      \
  45         {                                       \
  46                 .name = "DEPCMDPAR0("__stringify(n)")", \
  47                 .offset = DWC3_DEP_BASE(n) +    \
  48                         DWC3_DEPCMDPAR0,        \
  49         },                                      \
  50         {                                       \
  51                 .name = "DEPCMD("__stringify(n)")",     \
  52                 .offset = DWC3_DEP_BASE(n) +    \
  53                         DWC3_DEPCMD,            \
  54         }
  55
  56
  57 static const struct debugfs_reg32 dwc3_regs[] = {
  58         dump_register(GSBUSCFG0),
  59         dump_register(GSBUSCFG1),
  60         dump_register(GTXTHRCFG),
  61         dump_register(GRXTHRCFG),
  62         dump_register(GCTL),
  63         dump_register(GEVTEN),
  64         dump_register(GSTS),
  65         dump_register(GUCTL1),
  66         dump_register(GSNPSID),
  67         dump_register(GGPIO),
  68         dump_register(GUID),
  69         dump_register(GUCTL),
  70         dump_register(GBUSERRADDR0),
  71         dump_register(GBUSERRADDR1),
  72         dump_register(GPRTBIMAP0),
  73         dump_register(GPRTBIMAP1),
  74         dump_register(GHWPARAMS0),
  75         dump_register(GHWPARAMS1),
  76         dump_register(GHWPARAMS2),
  77         dump_register(GHWPARAMS3),
  78         dump_register(GHWPARAMS4),
  79         dump_register(GHWPARAMS5),
  80         dump_register(GHWPARAMS6),
  81         dump_register(GHWPARAMS7),
  82         dump_register(GDBGFIFOSPACE),
  83         dump_register(GDBGLTSSM),
  84         dump_register(GDBGBMU),
  85         dump_register(GDBGLSPMUX),
  86         dump_register(GDBGLSP),
  87         dump_register(GDBGEPINFO0),
  88         dump_register(GDBGEPINFO1),
  89         dump_register(GPRTBIMAP_HS0),
  90         dump_register(GPRTBIMAP_HS1),
  91         dump_register(GPRTBIMAP_FS0),
  92         dump_register(GPRTBIMAP_FS1),
  93
  94         dump_register(GUSB2PHYCFG(0)),
  95         dump_register(GUSB2PHYCFG(1)),
  96         dump_register(GUSB2PHYCFG(2)),
  97         dump_register(GUSB2PHYCFG(3)),
  98         dump_register(GUSB2PHYCFG(4)),
  99         dump_register(GUSB2PHYCFG(5)),
 100         dump_register(GUSB2PHYCFG(6)),
 101         dump_register(GUSB2PHYCFG(7)),
 102         dump_register(GUSB2PHYCFG(8)),
 103         dump_register(GUSB2PHYCFG(9)),
 104         dump_register(GUSB2PHYCFG(10)),
 105         dump_register(GUSB2PHYCFG(11)),
 106         dump_register(GUSB2PHYCFG(12)),
 107         dump_register(GUSB2PHYCFG(13)),
 108         dump_register(GUSB2PHYCFG(14)),
 109         dump_register(GUSB2PHYCFG(15)),
 110
 111         dump_register(GUSB2I2CCTL(0)),
 112         dump_register(GUSB2I2CCTL(1)),
 113         dump_register(GUSB2I2CCTL(2)),
 114         dump_register(GUSB2I2CCTL(3)),
 115         dump_register(GUSB2I2CCTL(4)),
 116         dump_register(GUSB2I2CCTL(5)),
 117         dump_register(GUSB2I2CCTL(6)),
 118         dump_register(GUSB2I2CCTL(7)),
 119         dump_register(GUSB2I2CCTL(8)),
 120         dump_register(GUSB2I2CCTL(9)),
 121         dump_register(GUSB2I2CCTL(10)),
 122         dump_register(GUSB2I2CCTL(11)),
 123         dump_register(GUSB2I2CCTL(12)),
 124         dump_register(GUSB2I2CCTL(13)),
 125         dump_register(GUSB2I2CCTL(14)),
 126         dump_register(GUSB2I2CCTL(15)),
 127
 128         dump_register(GUSB2PHYACC(0)),
 129         dump_register(GUSB2PHYACC(1)),
 130         dump_register(GUSB2PHYACC(2)),
 131         dump_register(GUSB2PHYACC(3)),
 132         dump_register(GUSB2PHYACC(4)),
 133         dump_register(GUSB2PHYACC(5)),
 134         dump_register(GUSB2PHYACC(6)),
 135         dump_register(GUSB2PHYACC(7)),
 136         dump_register(GUSB2PHYACC(8)),
 137         dump_register(GUSB2PHYACC(9)),
 138         dump_register(GUSB2PHYACC(10)),
 139         dump_register(GUSB2PHYACC(11)),
 140         dump_register(GUSB2PHYACC(12)),
 141         dump_register(GUSB2PHYACC(13)),
 142         dump_register(GUSB2PHYACC(14)),
 143         dump_register(GUSB2PHYACC(15)),
 144
 145         dump_register(GUSB3PIPECTL(0)),
 146         dump_register(GUSB3PIPECTL(1)),
 147         dump_register(GUSB3PIPECTL(2)),
 148         dump_register(GUSB3PIPECTL(3)),
 149         dump_register(GUSB3PIPECTL(4)),
 150         dump_register(GUSB3PIPECTL(5)),
 151         dump_register(GUSB3PIPECTL(6)),
 152         dump_register(GUSB3PIPECTL(7)),
 153         dump_register(GUSB3PIPECTL(8)),
 154         dump_register(GUSB3PIPECTL(9)),
 155         dump_register(GUSB3PIPECTL(10)),
 156         dump_register(GUSB3PIPECTL(11)),
 157         dump_register(GUSB3PIPECTL(12)),
 158         dump_register(GUSB3PIPECTL(13)),
 159         dump_register(GUSB3PIPECTL(14)),
 160         dump_register(GUSB3PIPECTL(15)),
 161
 162         dump_register(GTXFIFOSIZ(0)),
 163         dump_register(GTXFIFOSIZ(1)),
 164         dump_register(GTXFIFOSIZ(2)),
 165         dump_register(GTXFIFOSIZ(3)),
 166         dump_register(GTXFIFOSIZ(4)),
 167         dump_register(GTXFIFOSIZ(5)),
 168         dump_register(GTXFIFOSIZ(6)),
 169         dump_register(GTXFIFOSIZ(7)),
 170         dump_register(GTXFIFOSIZ(8)),
 171         dump_register(GTXFIFOSIZ(9)),
 172         dump_register(GTXFIFOSIZ(10)),
 173         dump_register(GTXFIFOSIZ(11)),
 174         dump_register(GTXFIFOSIZ(12)),
 175         dump_register(GTXFIFOSIZ(13)),
 176         dump_register(GTXFIFOSIZ(14)),
 177         dump_register(GTXFIFOSIZ(15)),
 178         dump_register(GTXFIFOSIZ(16)),
 179         dump_register(GTXFIFOSIZ(17)),
 180         dump_register(GTXFIFOSIZ(18)),
 181         dump_register(GTXFIFOSIZ(19)),
 182         dump_register(GTXFIFOSIZ(20)),
 183         dump_register(GTXFIFOSIZ(21)),
 184         dump_register(GTXFIFOSIZ(22)),
 185         dump_register(GTXFIFOSIZ(23)),
 186         dump_register(GTXFIFOSIZ(24)),
 187         dump_register(GTXFIFOSIZ(25)),
 188         dump_register(GTXFIFOSIZ(26)),
 189         dump_register(GTXFIFOSIZ(27)),
 190         dump_register(GTXFIFOSIZ(28)),
 191         dump_register(GTXFIFOSIZ(29)),
 192         dump_register(GTXFIFOSIZ(30)),
 193         dump_register(GTXFIFOSIZ(31)),
 194
 195         dump_register(GRXFIFOSIZ(0)),
 196         dump_register(GRXFIFOSIZ(1)),
 197         dump_register(GRXFIFOSIZ(2)),
 198         dump_register(GRXFIFOSIZ(3)),
 199         dump_register(GRXFIFOSIZ(4)),
 200         dump_register(GRXFIFOSIZ(5)),
 201         dump_register(GRXFIFOSIZ(6)),
 202         dump_register(GRXFIFOSIZ(7)),
 203         dump_register(GRXFIFOSIZ(8)),
 204         dump_register(GRXFIFOSIZ(9)),
 205         dump_register(GRXFIFOSIZ(10)),
 206         dump_register(GRXFIFOSIZ(11)),
 207         dump_register(GRXFIFOSIZ(12)),
 208         dump_register(GRXFIFOSIZ(13)),
 209         dump_register(GRXFIFOSIZ(14)),
 210         dump_register(GRXFIFOSIZ(15)),
 211         dump_register(GRXFIFOSIZ(16)),
 212         dump_register(GRXFIFOSIZ(17)),
 213         dump_register(GRXFIFOSIZ(18)),
 214         dump_register(GRXFIFOSIZ(19)),
 215         dump_register(GRXFIFOSIZ(20)),
 216         dump_register(GRXFIFOSIZ(21)),
 217         dump_register(GRXFIFOSIZ(22)),
 218         dump_register(GRXFIFOSIZ(23)),
 219         dump_register(GRXFIFOSIZ(24)),
 220         dump_register(GRXFIFOSIZ(25)),
 221         dump_register(GRXFIFOSIZ(26)),
 222         dump_register(GRXFIFOSIZ(27)),
 223         dump_register(GRXFIFOSIZ(28)),
 224         dump_register(GRXFIFOSIZ(29)),
 225         dump_register(GRXFIFOSIZ(30)),
 226         dump_register(GRXFIFOSIZ(31)),
 227
 228         dump_register(GEVNTADRLO(0)),
 229         dump_register(GEVNTADRHI(0)),
 230         dump_register(GEVNTSIZ(0)),
 231         dump_register(GEVNTCOUNT(0)),
 232
 233         dump_register(GHWPARAMS8),
 234         dump_register(DCFG),
 235         dump_register(DCTL),
 236         dump_register(DEVTEN),
 237         dump_register(DSTS),
 238         dump_register(DGCMDPAR),
 239         dump_register(DGCMD),
 240         dump_register(DALEPENA),
 241
 242         dump_ep_register_set(0),
 243         dump_ep_register_set(1),
 244         dump_ep_register_set(2),
 245         dump_ep_register_set(3),
 246         dump_ep_register_set(4),
 247         dump_ep_register_set(5),
 248         dump_ep_register_set(6),
 249         dump_ep_register_set(7),
 250         dump_ep_register_set(8),
 251         dump_ep_register_set(9),
 252         dump_ep_register_set(10),
 253         dump_ep_register_set(11),
 254         dump_ep_register_set(12),
 255         dump_ep_register_set(13),
 256         dump_ep_register_set(14),
 257         dump_ep_register_set(15),
 258         dump_ep_register_set(16),
 259         dump_ep_register_set(17),
 260         dump_ep_register_set(18),
 261         dump_ep_register_set(19),
 262         dump_ep_register_set(20),
 263         dump_ep_register_set(21),
 264         dump_ep_register_set(22),
 265         dump_ep_register_set(23),
 266         dump_ep_register_set(24),
 267         dump_ep_register_set(25),
 268         dump_ep_register_set(26),
 269         dump_ep_register_set(27),
 270         dump_ep_register_set(28),
 271         dump_ep_register_set(29),
 272         dump_ep_register_set(30),
 273         dump_ep_register_set(31),
 274
 275         dump_register(OCFG),
 276         dump_register(OCTL),
 277         dump_register(OEVT),
 278         dump_register(OEVTEN),
 279         dump_register(OSTS),
 280 };
 281
 282 static int dwc3_mode_show(struct seq_file *s, void *unused)
 283 {
 284         struct dwc3             *dwc = s->private;
 285         unsigned long           flags;
 286         u32                     reg;
 287
 288         spin_lock_irqsave(&dwc->lock, flags);
 289         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 290         spin_unlock_irqrestore(&dwc->lock, flags);
 291
 292         switch (DWC3_GCTL_PRTCAP(reg)) {
 293         case DWC3_GCTL_PRTCAP_HOST:
 294                 seq_printf(s, "host\n");
 295                 break;
 296         case DWC3_GCTL_PRTCAP_DEVICE:
 297                 seq_printf(s, "device\n");
 298                 break;
 299         case DWC3_GCTL_PRTCAP_OTG:
 300                 seq_printf(s, "otg\n");
 301                 break;
 302         default:
 303                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 304         }
 305
 306         return 0;
 307 }
 308
 309 static int dwc3_mode_open(struct inode *inode, struct file *file)
 310 {
 311         return single_open(file, dwc3_mode_show, inode->i_private);
 312 }
 313
 314 static ssize_t dwc3_mode_write(struct file *file,
 315                 const char __user *ubuf, size_t count, loff_t *ppos)
 316 {
 317         struct seq_file         *s = file->private_data;
 318         struct dwc3             *dwc = s->private;
 319         u32                     mode = 0;
 320         char                    buf[32];
 321
 322         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 323                 return -EFAULT;
 324
 325         if (!strncmp(buf, "host", 4))
 326                 mode = DWC3_GCTL_PRTCAP_HOST;
 327
 328         if (!strncmp(buf, "device", 6))
 329                 mode = DWC3_GCTL_PRTCAP_DEVICE;
 330
 331         if (!strncmp(buf, "otg", 3))
 332                 mode = DWC3_GCTL_PRTCAP_OTG;
 333
 334         dwc3_set_mode(dwc, mode);
 335
 336         return count;
 337 }
 338
 339 static const struct file_operations dwc3_mode_fops = {
 340         .open                   = dwc3_mode_open,
 341         .write                  = dwc3_mode_write,
 342         .read                   = seq_read,
 343         .llseek                 = seq_lseek,
 344         .release                = single_release,
 345 };
 346
 347 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 348 {
 349         struct dwc3             *dwc = s->private;
 350         unsigned long           flags;
 351         u32                     reg;
 352
 353         spin_lock_irqsave(&dwc->lock, flags);
 354         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 355         reg &= DWC3_DCTL_TSTCTRL_MASK;
 356         reg >>= 1;
 357         spin_unlock_irqrestore(&dwc->lock, flags);
 358
 359         switch (reg) {
 360         case 0:
 361                 seq_printf(s, "no test\n");
 362                 break;
 363         case TEST_J:
 364                 seq_printf(s, "test_j\n");
 365                 break;
 366         case TEST_K:
 367                 seq_printf(s, "test_k\n");
 368                 break;
 369         case TEST_SE0_NAK:
 370                 seq_printf(s, "test_se0_nak\n");
 371                 break;
 372         case TEST_PACKET:
 373                 seq_printf(s, "test_packet\n");
 374                 break;
 375         case TEST_FORCE_EN:
 376                 seq_printf(s, "test_force_enable\n");
 377                 break;
 378         default:
 379                 seq_printf(s, "UNKNOWN %d\n", reg);
 380         }
 381
 382         return 0;
 383 }
 384
 385 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 386 {
 387         return single_open(file, dwc3_testmode_show, inode->i_private);
 388 }
 389
 390 static ssize_t dwc3_testmode_write(struct file *file,
 391                 const char __user *ubuf, size_t count, loff_t *ppos)
 392 {
 393         struct seq_file         *s = file->private_data;
 394         struct dwc3             *dwc = s->private;
 395         unsigned long           flags;
 396         u32                     testmode = 0;
 397         char                    buf[32];
 398
 399         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 400                 return -EFAULT;
 401
 402         if (!strncmp(buf, "test_j", 6))
 403                 testmode = TEST_J;
 404         else if (!strncmp(buf, "test_k", 6))
 405                 testmode = TEST_K;
 406         else if (!strncmp(buf, "test_se0_nak", 12))
 407                 testmode = TEST_SE0_NAK;
 408         else if (!strncmp(buf, "test_packet", 11))
 409                 testmode = TEST_PACKET;
 410         else if (!strncmp(buf, "test_force_enable", 17))
 411                 testmode = TEST_FORCE_EN;
 412         else
 413                 testmode = 0;
 414
 415         spin_lock_irqsave(&dwc->lock, flags);
 416         dwc3_gadget_set_test_mode(dwc, testmode);
 417         spin_unlock_irqrestore(&dwc->lock, flags);
 418
 419         return count;
 420 }
 421
 422 static const struct file_operations dwc3_testmode_fops = {
 423         .open                   = dwc3_testmode_open,
 424         .write                  = dwc3_testmode_write,
 425         .read                   = seq_read,
 426         .llseek                 = seq_lseek,
 427         .release                = single_release,
 428 };
 429
 430 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 431 {
 432         struct dwc3             *dwc = s->private;
 433         unsigned long           flags;
 434         enum dwc3_link_state    state;
 435         u32                     reg;
 436         u8                      speed;
 437
 438         spin_lock_irqsave(&dwc->lock, flags);
 439         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 440         state = DWC3_DSTS_USBLNKST(reg);
 441         speed = reg & DWC3_DSTS_CONNECTSPD;
 442
 443         seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
 444                    dwc3_gadget_link_string(state) :
 445                    dwc3_gadget_hs_link_string(state));
 446         spin_unlock_irqrestore(&dwc->lock, flags);
 447
 448         return 0;
 449 }
 450
 451 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 452 {
 453         return single_open(file, dwc3_link_state_show, inode->i_private);
 454 }
 455
 456 static ssize_t dwc3_link_state_write(struct file *file,
 457                 const char __user *ubuf, size_t count, loff_t *ppos)
 458 {
 459         struct seq_file         *s = file->private_data;
 460         struct dwc3             *dwc = s->private;
 461         unsigned long           flags;
 462         enum dwc3_link_state    state = 0;
 463         char                    buf[32];
 464         u32                     reg;
 465         u8                      speed;
 466
 467         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 468                 return -EFAULT;
 469
 470         if (!strncmp(buf, "SS.Disabled", 11))
 471                 state = DWC3_LINK_STATE_SS_DIS;
 472         else if (!strncmp(buf, "Rx.Detect", 9))
 473                 state = DWC3_LINK_STATE_RX_DET;
 474         else if (!strncmp(buf, "SS.Inactive", 11))
 475                 state = DWC3_LINK_STATE_SS_INACT;
 476         else if (!strncmp(buf, "Recovery", 8))
 477                 state = DWC3_LINK_STATE_RECOV;
 478         else if (!strncmp(buf, "Compliance", 10))
 479                 state = DWC3_LINK_STATE_CMPLY;
 480         else if (!strncmp(buf, "Loopback", 8))
 481                 state = DWC3_LINK_STATE_LPBK;
 482         else
 483                 return -EINVAL;
 484
 485         spin_lock_irqsave(&dwc->lock, flags);
 486         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 487         speed = reg & DWC3_DSTS_CONNECTSPD;
 488
 489         if (speed < DWC3_DSTS_SUPERSPEED &&
 490             state != DWC3_LINK_STATE_RECOV) {
 491                 spin_unlock_irqrestore(&dwc->lock, flags);
 492                 return -EINVAL;
 493         }
 494
 495         dwc3_gadget_set_link_state(dwc, state);
 496         spin_unlock_irqrestore(&dwc->lock, flags);
 497
 498         return count;
 499 }
 500
 501 static const struct file_operations dwc3_link_state_fops = {
 502         .open                   = dwc3_link_state_open,
 503         .write                  = dwc3_link_state_write,
 504         .read                   = seq_read,
 505         .llseek                 = seq_lseek,
 506         .release                = single_release,
 507 };
 508
 509 struct dwc3_ep_file_map {
 510         const char name[25];
 511         const struct file_operations *const fops;
 512 };
 513
 514 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
 515 {
 516         struct dwc3_ep          *dep = s->private;
 517         struct dwc3             *dwc = dep->dwc;
 518         unsigned long           flags;
 519         u32                     val;
 520
 521         spin_lock_irqsave(&dwc->lock, flags);
 522         val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
 523         seq_printf(s, "%u\n", val);
 524         spin_unlock_irqrestore(&dwc->lock, flags);
 525
 526         return 0;
 527 }
 528
 529 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
 530 {
 531         struct dwc3_ep          *dep = s->private;
 532         struct dwc3             *dwc = dep->dwc;
 533         unsigned long           flags;
 534         u32                     val;
 535
 536         spin_lock_irqsave(&dwc->lock, flags);
 537         val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
 538         seq_printf(s, "%u\n", val);
 539         spin_unlock_irqrestore(&dwc->lock, flags);
 540
 541         return 0;
 542 }
 543
 544 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
 545 {
 546         struct dwc3_ep          *dep = s->private;
 547         struct dwc3             *dwc = dep->dwc;
 548         unsigned long           flags;
 549         u32                     val;
 550
 551         spin_lock_irqsave(&dwc->lock, flags);
 552         val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
 553         seq_printf(s, "%u\n", val);
 554         spin_unlock_irqrestore(&dwc->lock, flags);
 555
 556         return 0;
 557 }
 558
 559 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
 560 {
 561         struct dwc3_ep          *dep = s->private;
 562         struct dwc3             *dwc = dep->dwc;
 563         unsigned long           flags;
 564         u32                     val;
 565
 566         spin_lock_irqsave(&dwc->lock, flags);
 567         val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
 568         seq_printf(s, "%u\n", val);
 569         spin_unlock_irqrestore(&dwc->lock, flags);
 570
 571         return 0;
 572 }
 573
 574 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
 575 {
 576         struct dwc3_ep          *dep = s->private;
 577         struct dwc3             *dwc = dep->dwc;
 578         unsigned long           flags;
 579         u32                     val;
 580
 581         spin_lock_irqsave(&dwc->lock, flags);
 582         val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
 583         seq_printf(s, "%u\n", val);
 584         spin_unlock_irqrestore(&dwc->lock, flags);
 585
 586         return 0;
 587 }
 588
 589 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
 590 {
 591         struct dwc3_ep          *dep = s->private;
 592         struct dwc3             *dwc = dep->dwc;
 593         unsigned long           flags;
 594         u32                     val;
 595
 596         spin_lock_irqsave(&dwc->lock, flags);
 597         val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
 598         seq_printf(s, "%u\n", val);
 599         spin_unlock_irqrestore(&dwc->lock, flags);
 600
 601         return 0;
 602 }
 603
 604 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
 605 {
 606         struct dwc3_ep          *dep = s->private;
 607         struct dwc3             *dwc = dep->dwc;
 608         unsigned long           flags;
 609         u32                     val;
 610
 611         spin_lock_irqsave(&dwc->lock, flags);
 612         val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
 613         seq_printf(s, "%u\n", val);
 614         spin_unlock_irqrestore(&dwc->lock, flags);
 615
 616         return 0;
 617 }
 618
 619 static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
 620 {
 621         struct dwc3_ep          *dep = s->private;
 622         struct dwc3             *dwc = dep->dwc;
 623         unsigned long           flags;
 624
 625         spin_lock_irqsave(&dwc->lock, flags);
 626         if (!(dep->flags & DWC3_EP_ENABLED) ||
 627                         !dep->endpoint.desc) {
 628                 seq_printf(s, "--\n");
 629                 goto out;
 630         }
 631
 632         switch (usb_endpoint_type(dep->endpoint.desc)) {
 633         case USB_ENDPOINT_XFER_CONTROL:
 634                 seq_printf(s, "control\n");
 635                 break;
 636         case USB_ENDPOINT_XFER_ISOC:
 637                 seq_printf(s, "isochronous\n");
 638                 break;
 639         case USB_ENDPOINT_XFER_BULK:
 640                 seq_printf(s, "bulk\n");
 641                 break;
 642         case USB_ENDPOINT_XFER_INT:
 643                 seq_printf(s, "interrupt\n");
 644                 break;
 645         default:
 646                 seq_printf(s, "--\n");
 647         }
 648
 649 out:
 650         spin_unlock_irqrestore(&dwc->lock, flags);
 651
 652         return 0;
 653 }
 654
 655 static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
 656 {
 657         struct dwc3_ep          *dep = s->private;
 658         struct dwc3             *dwc = dep->dwc;
 659         unsigned long           flags;
 660         int                     i;
 661
 662         spin_lock_irqsave(&dwc->lock, flags);
 663         if (dep->number <= 1) {
 664                 seq_printf(s, "--\n");
 665                 goto out;
 666         }
 667
 668         seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
 669
 670         for (i = 0; i < DWC3_TRB_NUM; i++) {
 671                 struct dwc3_trb *trb = &dep->trb_pool[i];
 672                 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
 673
 674                 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d       %c%c\n",
 675                                 trb->bph, trb->bpl, trb->size,
 676                                 dwc3_trb_type_string(type),
 677                                 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
 678                                 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
 679                                 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
 680                                 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
 681                                 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
 682                                 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
 683                                 dep->trb_enqueue == i ? 'E' : ' ',
 684                                 dep->trb_dequeue == i ? 'D' : ' ');
 685         }
 686
 687 out:
 688         spin_unlock_irqrestore(&dwc->lock, flags);
 689
 690         return 0;
 691 }
 692
 693 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_queue);
 694 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_queue);
 695 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
 696 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
 697 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
 698 DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
 699 DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
 700 DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
 701 DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
 702
 703 static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
 704         { "tx_fifo_queue", &dwc3_tx_fifo_queue_fops, },
 705         { "rx_fifo_queue", &dwc3_rx_fifo_queue_fops, },
 706         { "tx_request_queue", &dwc3_tx_request_queue_fops, },
 707         { "rx_request_queue", &dwc3_rx_request_queue_fops, },
 708         { "rx_info_queue", &dwc3_rx_info_queue_fops, },
 709         { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
 710         { "event_queue", &dwc3_event_queue_fops, },
 711         { "transfer_type", &dwc3_transfer_type_fops, },
 712         { "trb_ring", &dwc3_trb_ring_fops, },
 713 };
 714
 715 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
 716                 struct dentry *parent)
 717 {
 718         int                     i;
 719
 720         for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
 721                 const struct file_operations *fops = dwc3_ep_file_map[i].fops;
 722                 const char *name = dwc3_ep_file_map[i].name;
 723
 724                 debugfs_create_file(name, S_IRUGO, parent, dep, fops);
 725         }
 726 }
 727
 728 void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
 729 {
 730         struct dentry           *dir;
 731
 732         dir = debugfs_create_dir(dep->name, dep->dwc->root);
 733         dwc3_debugfs_create_endpoint_files(dep, dir);
 734 }
 735
 736 void dwc3_debugfs_init(struct dwc3 *dwc)
 737 {
 738         struct dentry           *root;
 739
 740         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
 741         if (!dwc->regset)
 742                 return;
 743
 744         dwc->regset->regs = dwc3_regs;
 745         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
 746         dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
 747
 748         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 749         dwc->root = root;
 750
 751         debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
 752
 753         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
 754                 debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, dwc,
 755                                     &dwc3_mode_fops);
 756         }
 757
 758         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
 759                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
 760                 debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, dwc,
 761                                     &dwc3_testmode_fops);
 762                 debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, dwc,
 763                                     &dwc3_link_state_fops);
 764         }
 765 }
 766
 767 void dwc3_debugfs_exit(struct dwc3 *dwc)
 768 {
 769         debugfs_remove_recursive(dwc->root);
 770         kfree(dwc->regset);
 771 }