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(GPRTBIMAP_HS0),
  85         dump_register(GPRTBIMAP_HS1),
  86         dump_register(GPRTBIMAP_FS0),
  87         dump_register(GPRTBIMAP_FS1),
  88
  89         dump_register(GUSB2PHYCFG(0)),
  90         dump_register(GUSB2PHYCFG(1)),
  91         dump_register(GUSB2PHYCFG(2)),
  92         dump_register(GUSB2PHYCFG(3)),
  93         dump_register(GUSB2PHYCFG(4)),
  94         dump_register(GUSB2PHYCFG(5)),
  95         dump_register(GUSB2PHYCFG(6)),
  96         dump_register(GUSB2PHYCFG(7)),
  97         dump_register(GUSB2PHYCFG(8)),
  98         dump_register(GUSB2PHYCFG(9)),
  99         dump_register(GUSB2PHYCFG(10)),
 100         dump_register(GUSB2PHYCFG(11)),
 101         dump_register(GUSB2PHYCFG(12)),
 102         dump_register(GUSB2PHYCFG(13)),
 103         dump_register(GUSB2PHYCFG(14)),
 104         dump_register(GUSB2PHYCFG(15)),
 105
 106         dump_register(GUSB2I2CCTL(0)),
 107         dump_register(GUSB2I2CCTL(1)),
 108         dump_register(GUSB2I2CCTL(2)),
 109         dump_register(GUSB2I2CCTL(3)),
 110         dump_register(GUSB2I2CCTL(4)),
 111         dump_register(GUSB2I2CCTL(5)),
 112         dump_register(GUSB2I2CCTL(6)),
 113         dump_register(GUSB2I2CCTL(7)),
 114         dump_register(GUSB2I2CCTL(8)),
 115         dump_register(GUSB2I2CCTL(9)),
 116         dump_register(GUSB2I2CCTL(10)),
 117         dump_register(GUSB2I2CCTL(11)),
 118         dump_register(GUSB2I2CCTL(12)),
 119         dump_register(GUSB2I2CCTL(13)),
 120         dump_register(GUSB2I2CCTL(14)),
 121         dump_register(GUSB2I2CCTL(15)),
 122
 123         dump_register(GUSB2PHYACC(0)),
 124         dump_register(GUSB2PHYACC(1)),
 125         dump_register(GUSB2PHYACC(2)),
 126         dump_register(GUSB2PHYACC(3)),
 127         dump_register(GUSB2PHYACC(4)),
 128         dump_register(GUSB2PHYACC(5)),
 129         dump_register(GUSB2PHYACC(6)),
 130         dump_register(GUSB2PHYACC(7)),
 131         dump_register(GUSB2PHYACC(8)),
 132         dump_register(GUSB2PHYACC(9)),
 133         dump_register(GUSB2PHYACC(10)),
 134         dump_register(GUSB2PHYACC(11)),
 135         dump_register(GUSB2PHYACC(12)),
 136         dump_register(GUSB2PHYACC(13)),
 137         dump_register(GUSB2PHYACC(14)),
 138         dump_register(GUSB2PHYACC(15)),
 139
 140         dump_register(GUSB3PIPECTL(0)),
 141         dump_register(GUSB3PIPECTL(1)),
 142         dump_register(GUSB3PIPECTL(2)),
 143         dump_register(GUSB3PIPECTL(3)),
 144         dump_register(GUSB3PIPECTL(4)),
 145         dump_register(GUSB3PIPECTL(5)),
 146         dump_register(GUSB3PIPECTL(6)),
 147         dump_register(GUSB3PIPECTL(7)),
 148         dump_register(GUSB3PIPECTL(8)),
 149         dump_register(GUSB3PIPECTL(9)),
 150         dump_register(GUSB3PIPECTL(10)),
 151         dump_register(GUSB3PIPECTL(11)),
 152         dump_register(GUSB3PIPECTL(12)),
 153         dump_register(GUSB3PIPECTL(13)),
 154         dump_register(GUSB3PIPECTL(14)),
 155         dump_register(GUSB3PIPECTL(15)),
 156
 157         dump_register(GTXFIFOSIZ(0)),
 158         dump_register(GTXFIFOSIZ(1)),
 159         dump_register(GTXFIFOSIZ(2)),
 160         dump_register(GTXFIFOSIZ(3)),
 161         dump_register(GTXFIFOSIZ(4)),
 162         dump_register(GTXFIFOSIZ(5)),
 163         dump_register(GTXFIFOSIZ(6)),
 164         dump_register(GTXFIFOSIZ(7)),
 165         dump_register(GTXFIFOSIZ(8)),
 166         dump_register(GTXFIFOSIZ(9)),
 167         dump_register(GTXFIFOSIZ(10)),
 168         dump_register(GTXFIFOSIZ(11)),
 169         dump_register(GTXFIFOSIZ(12)),
 170         dump_register(GTXFIFOSIZ(13)),
 171         dump_register(GTXFIFOSIZ(14)),
 172         dump_register(GTXFIFOSIZ(15)),
 173         dump_register(GTXFIFOSIZ(16)),
 174         dump_register(GTXFIFOSIZ(17)),
 175         dump_register(GTXFIFOSIZ(18)),
 176         dump_register(GTXFIFOSIZ(19)),
 177         dump_register(GTXFIFOSIZ(20)),
 178         dump_register(GTXFIFOSIZ(21)),
 179         dump_register(GTXFIFOSIZ(22)),
 180         dump_register(GTXFIFOSIZ(23)),
 181         dump_register(GTXFIFOSIZ(24)),
 182         dump_register(GTXFIFOSIZ(25)),
 183         dump_register(GTXFIFOSIZ(26)),
 184         dump_register(GTXFIFOSIZ(27)),
 185         dump_register(GTXFIFOSIZ(28)),
 186         dump_register(GTXFIFOSIZ(29)),
 187         dump_register(GTXFIFOSIZ(30)),
 188         dump_register(GTXFIFOSIZ(31)),
 189
 190         dump_register(GRXFIFOSIZ(0)),
 191         dump_register(GRXFIFOSIZ(1)),
 192         dump_register(GRXFIFOSIZ(2)),
 193         dump_register(GRXFIFOSIZ(3)),
 194         dump_register(GRXFIFOSIZ(4)),
 195         dump_register(GRXFIFOSIZ(5)),
 196         dump_register(GRXFIFOSIZ(6)),
 197         dump_register(GRXFIFOSIZ(7)),
 198         dump_register(GRXFIFOSIZ(8)),
 199         dump_register(GRXFIFOSIZ(9)),
 200         dump_register(GRXFIFOSIZ(10)),
 201         dump_register(GRXFIFOSIZ(11)),
 202         dump_register(GRXFIFOSIZ(12)),
 203         dump_register(GRXFIFOSIZ(13)),
 204         dump_register(GRXFIFOSIZ(14)),
 205         dump_register(GRXFIFOSIZ(15)),
 206         dump_register(GRXFIFOSIZ(16)),
 207         dump_register(GRXFIFOSIZ(17)),
 208         dump_register(GRXFIFOSIZ(18)),
 209         dump_register(GRXFIFOSIZ(19)),
 210         dump_register(GRXFIFOSIZ(20)),
 211         dump_register(GRXFIFOSIZ(21)),
 212         dump_register(GRXFIFOSIZ(22)),
 213         dump_register(GRXFIFOSIZ(23)),
 214         dump_register(GRXFIFOSIZ(24)),
 215         dump_register(GRXFIFOSIZ(25)),
 216         dump_register(GRXFIFOSIZ(26)),
 217         dump_register(GRXFIFOSIZ(27)),
 218         dump_register(GRXFIFOSIZ(28)),
 219         dump_register(GRXFIFOSIZ(29)),
 220         dump_register(GRXFIFOSIZ(30)),
 221         dump_register(GRXFIFOSIZ(31)),
 222
 223         dump_register(GEVNTADRLO(0)),
 224         dump_register(GEVNTADRHI(0)),
 225         dump_register(GEVNTSIZ(0)),
 226         dump_register(GEVNTCOUNT(0)),
 227
 228         dump_register(GHWPARAMS8),
 229         dump_register(DCFG),
 230         dump_register(DCTL),
 231         dump_register(DEVTEN),
 232         dump_register(DSTS),
 233         dump_register(DGCMDPAR),
 234         dump_register(DGCMD),
 235         dump_register(DALEPENA),
 236
 237         dump_ep_register_set(0),
 238         dump_ep_register_set(1),
 239         dump_ep_register_set(2),
 240         dump_ep_register_set(3),
 241         dump_ep_register_set(4),
 242         dump_ep_register_set(5),
 243         dump_ep_register_set(6),
 244         dump_ep_register_set(7),
 245         dump_ep_register_set(8),
 246         dump_ep_register_set(9),
 247         dump_ep_register_set(10),
 248         dump_ep_register_set(11),
 249         dump_ep_register_set(12),
 250         dump_ep_register_set(13),
 251         dump_ep_register_set(14),
 252         dump_ep_register_set(15),
 253         dump_ep_register_set(16),
 254         dump_ep_register_set(17),
 255         dump_ep_register_set(18),
 256         dump_ep_register_set(19),
 257         dump_ep_register_set(20),
 258         dump_ep_register_set(21),
 259         dump_ep_register_set(22),
 260         dump_ep_register_set(23),
 261         dump_ep_register_set(24),
 262         dump_ep_register_set(25),
 263         dump_ep_register_set(26),
 264         dump_ep_register_set(27),
 265         dump_ep_register_set(28),
 266         dump_ep_register_set(29),
 267         dump_ep_register_set(30),
 268         dump_ep_register_set(31),
 269
 270         dump_register(OCFG),
 271         dump_register(OCTL),
 272         dump_register(OEVT),
 273         dump_register(OEVTEN),
 274         dump_register(OSTS),
 275 };
 276
 277 static int dwc3_mode_show(struct seq_file *s, void *unused)
 278 {
 279         struct dwc3             *dwc = s->private;
 280         unsigned long           flags;
 281         u32                     reg;
 282
 283         spin_lock_irqsave(&dwc->lock, flags);
 284         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 285         spin_unlock_irqrestore(&dwc->lock, flags);
 286
 287         switch (DWC3_GCTL_PRTCAP(reg)) {
 288         case DWC3_GCTL_PRTCAP_HOST:
 289                 seq_printf(s, "host\n");
 290                 break;
 291         case DWC3_GCTL_PRTCAP_DEVICE:
 292                 seq_printf(s, "device\n");
 293                 break;
 294         case DWC3_GCTL_PRTCAP_OTG:
 295                 seq_printf(s, "otg\n");
 296                 break;
 297         default:
 298                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 299         }
 300
 301         return 0;
 302 }
 303
 304 static int dwc3_mode_open(struct inode *inode, struct file *file)
 305 {
 306         return single_open(file, dwc3_mode_show, inode->i_private);
 307 }
 308
 309 static ssize_t dwc3_mode_write(struct file *file,
 310                 const char __user *ubuf, size_t count, loff_t *ppos)
 311 {
 312         struct seq_file         *s = file->private_data;
 313         struct dwc3             *dwc = s->private;
 314         u32                     mode = 0;
 315         char                    buf[32];
 316
 317         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 318                 return -EFAULT;
 319
 320         if (!strncmp(buf, "host", 4))
 321                 mode = DWC3_GCTL_PRTCAP_HOST;
 322
 323         if (!strncmp(buf, "device", 6))
 324                 mode = DWC3_GCTL_PRTCAP_DEVICE;
 325
 326         if (!strncmp(buf, "otg", 3))
 327                 mode = DWC3_GCTL_PRTCAP_OTG;
 328
 329         dwc3_set_mode(dwc, mode);
 330
 331         return count;
 332 }
 333
 334 static const struct file_operations dwc3_mode_fops = {
 335         .open                   = dwc3_mode_open,
 336         .write                  = dwc3_mode_write,
 337         .read                   = seq_read,
 338         .llseek                 = seq_lseek,
 339         .release                = single_release,
 340 };
 341
 342 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 343 {
 344         struct dwc3             *dwc = s->private;
 345         unsigned long           flags;
 346         u32                     reg;
 347
 348         spin_lock_irqsave(&dwc->lock, flags);
 349         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 350         reg &= DWC3_DCTL_TSTCTRL_MASK;
 351         reg >>= 1;
 352         spin_unlock_irqrestore(&dwc->lock, flags);
 353
 354         switch (reg) {
 355         case 0:
 356                 seq_printf(s, "no test\n");
 357                 break;
 358         case TEST_J:
 359                 seq_printf(s, "test_j\n");
 360                 break;
 361         case TEST_K:
 362                 seq_printf(s, "test_k\n");
 363                 break;
 364         case TEST_SE0_NAK:
 365                 seq_printf(s, "test_se0_nak\n");
 366                 break;
 367         case TEST_PACKET:
 368                 seq_printf(s, "test_packet\n");
 369                 break;
 370         case TEST_FORCE_EN:
 371                 seq_printf(s, "test_force_enable\n");
 372                 break;
 373         default:
 374                 seq_printf(s, "UNKNOWN %d\n", reg);
 375         }
 376
 377         return 0;
 378 }
 379
 380 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 381 {
 382         return single_open(file, dwc3_testmode_show, inode->i_private);
 383 }
 384
 385 static ssize_t dwc3_testmode_write(struct file *file,
 386                 const char __user *ubuf, size_t count, loff_t *ppos)
 387 {
 388         struct seq_file         *s = file->private_data;
 389         struct dwc3             *dwc = s->private;
 390         unsigned long           flags;
 391         u32                     testmode = 0;
 392         char                    buf[32];
 393
 394         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 395                 return -EFAULT;
 396
 397         if (!strncmp(buf, "test_j", 6))
 398                 testmode = TEST_J;
 399         else if (!strncmp(buf, "test_k", 6))
 400                 testmode = TEST_K;
 401         else if (!strncmp(buf, "test_se0_nak", 12))
 402                 testmode = TEST_SE0_NAK;
 403         else if (!strncmp(buf, "test_packet", 11))
 404                 testmode = TEST_PACKET;
 405         else if (!strncmp(buf, "test_force_enable", 17))
 406                 testmode = TEST_FORCE_EN;
 407         else
 408                 testmode = 0;
 409
 410         spin_lock_irqsave(&dwc->lock, flags);
 411         dwc3_gadget_set_test_mode(dwc, testmode);
 412         spin_unlock_irqrestore(&dwc->lock, flags);
 413
 414         return count;
 415 }
 416
 417 static const struct file_operations dwc3_testmode_fops = {
 418         .open                   = dwc3_testmode_open,
 419         .write                  = dwc3_testmode_write,
 420         .read                   = seq_read,
 421         .llseek                 = seq_lseek,
 422         .release                = single_release,
 423 };
 424
 425 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 426 {
 427         struct dwc3             *dwc = s->private;
 428         unsigned long           flags;
 429         enum dwc3_link_state    state;
 430         u32                     reg;
 431
 432         spin_lock_irqsave(&dwc->lock, flags);
 433         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 434         state = DWC3_DSTS_USBLNKST(reg);
 435         spin_unlock_irqrestore(&dwc->lock, flags);
 436
 437         seq_printf(s, "%s\n", dwc3_gadget_link_string(state));
 438
 439         return 0;
 440 }
 441
 442 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 443 {
 444         return single_open(file, dwc3_link_state_show, inode->i_private);
 445 }
 446
 447 static ssize_t dwc3_link_state_write(struct file *file,
 448                 const char __user *ubuf, size_t count, loff_t *ppos)
 449 {
 450         struct seq_file         *s = file->private_data;
 451         struct dwc3             *dwc = s->private;
 452         unsigned long           flags;
 453         enum dwc3_link_state    state = 0;
 454         char                    buf[32];
 455
 456         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 457                 return -EFAULT;
 458
 459         if (!strncmp(buf, "SS.Disabled", 11))
 460                 state = DWC3_LINK_STATE_SS_DIS;
 461         else if (!strncmp(buf, "Rx.Detect", 9))
 462                 state = DWC3_LINK_STATE_RX_DET;
 463         else if (!strncmp(buf, "SS.Inactive", 11))
 464                 state = DWC3_LINK_STATE_SS_INACT;
 465         else if (!strncmp(buf, "Recovery", 8))
 466                 state = DWC3_LINK_STATE_RECOV;
 467         else if (!strncmp(buf, "Compliance", 10))
 468                 state = DWC3_LINK_STATE_CMPLY;
 469         else if (!strncmp(buf, "Loopback", 8))
 470                 state = DWC3_LINK_STATE_LPBK;
 471         else
 472                 return -EINVAL;
 473
 474         spin_lock_irqsave(&dwc->lock, flags);
 475         dwc3_gadget_set_link_state(dwc, state);
 476         spin_unlock_irqrestore(&dwc->lock, flags);
 477
 478         return count;
 479 }
 480
 481 static const struct file_operations dwc3_link_state_fops = {
 482         .open                   = dwc3_link_state_open,
 483         .write                  = dwc3_link_state_write,
 484         .read                   = seq_read,
 485         .llseek                 = seq_lseek,
 486         .release                = single_release,
 487 };
 488
 489 struct dwc3_ep_file_map {
 490         const char name[25];
 491         const struct file_operations *const fops;
 492 };
 493
 494 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
 495 {
 496         struct dwc3_ep          *dep = s->private;
 497         struct dwc3             *dwc = dep->dwc;
 498         unsigned long           flags;
 499         u32                     val;
 500
 501         spin_lock_irqsave(&dwc->lock, flags);
 502         val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
 503         seq_printf(s, "%u\n", val);
 504         spin_unlock_irqrestore(&dwc->lock, flags);
 505
 506         return 0;
 507 }
 508
 509 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
 510 {
 511         struct dwc3_ep          *dep = s->private;
 512         struct dwc3             *dwc = dep->dwc;
 513         unsigned long           flags;
 514         u32                     val;
 515
 516         spin_lock_irqsave(&dwc->lock, flags);
 517         val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
 518         seq_printf(s, "%u\n", val);
 519         spin_unlock_irqrestore(&dwc->lock, flags);
 520
 521         return 0;
 522 }
 523
 524 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
 525 {
 526         struct dwc3_ep          *dep = s->private;
 527         struct dwc3             *dwc = dep->dwc;
 528         unsigned long           flags;
 529         u32                     val;
 530
 531         spin_lock_irqsave(&dwc->lock, flags);
 532         val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
 533         seq_printf(s, "%u\n", val);
 534         spin_unlock_irqrestore(&dwc->lock, flags);
 535
 536         return 0;
 537 }
 538
 539 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
 540 {
 541         struct dwc3_ep          *dep = s->private;
 542         struct dwc3             *dwc = dep->dwc;
 543         unsigned long           flags;
 544         u32                     val;
 545
 546         spin_lock_irqsave(&dwc->lock, flags);
 547         val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
 548         seq_printf(s, "%u\n", val);
 549         spin_unlock_irqrestore(&dwc->lock, flags);
 550
 551         return 0;
 552 }
 553
 554 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
 555 {
 556         struct dwc3_ep          *dep = s->private;
 557         struct dwc3             *dwc = dep->dwc;
 558         unsigned long           flags;
 559         u32                     val;
 560
 561         spin_lock_irqsave(&dwc->lock, flags);
 562         val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
 563         seq_printf(s, "%u\n", val);
 564         spin_unlock_irqrestore(&dwc->lock, flags);
 565
 566         return 0;
 567 }
 568
 569 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
 570 {
 571         struct dwc3_ep          *dep = s->private;
 572         struct dwc3             *dwc = dep->dwc;
 573         unsigned long           flags;
 574         u32                     val;
 575
 576         spin_lock_irqsave(&dwc->lock, flags);
 577         val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
 578         seq_printf(s, "%u\n", val);
 579         spin_unlock_irqrestore(&dwc->lock, flags);
 580
 581         return 0;
 582 }
 583
 584 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
 585 {
 586         struct dwc3_ep          *dep = s->private;
 587         struct dwc3             *dwc = dep->dwc;
 588         unsigned long           flags;
 589         u32                     val;
 590
 591         spin_lock_irqsave(&dwc->lock, flags);
 592         val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
 593         seq_printf(s, "%u\n", val);
 594         spin_unlock_irqrestore(&dwc->lock, flags);
 595
 596         return 0;
 597 }
 598
 599 static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
 600 {
 601         struct dwc3_ep          *dep = s->private;
 602         struct dwc3             *dwc = dep->dwc;
 603         unsigned long           flags;
 604
 605         spin_lock_irqsave(&dwc->lock, flags);
 606         if (!(dep->flags & DWC3_EP_ENABLED) ||
 607                         !dep->endpoint.desc) {
 608                 seq_printf(s, "--\n");
 609                 goto out;
 610         }
 611
 612         switch (usb_endpoint_type(dep->endpoint.desc)) {
 613         case USB_ENDPOINT_XFER_CONTROL:
 614                 seq_printf(s, "control\n");
 615                 break;
 616         case USB_ENDPOINT_XFER_ISOC:
 617                 seq_printf(s, "isochronous\n");
 618                 break;
 619         case USB_ENDPOINT_XFER_BULK:
 620                 seq_printf(s, "bulk\n");
 621                 break;
 622         case USB_ENDPOINT_XFER_INT:
 623                 seq_printf(s, "interrupt\n");
 624                 break;
 625         default:
 626                 seq_printf(s, "--\n");
 627         }
 628
 629 out:
 630         spin_unlock_irqrestore(&dwc->lock, flags);
 631
 632         return 0;
 633 }
 634
 635 static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
 636 {
 637         struct dwc3_ep          *dep = s->private;
 638         struct dwc3             *dwc = dep->dwc;
 639         unsigned long           flags;
 640         int                     i;
 641
 642         spin_lock_irqsave(&dwc->lock, flags);
 643         if (dep->number <= 1) {
 644                 seq_printf(s, "--\n");
 645                 goto out;
 646         }
 647
 648         seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
 649
 650         for (i = 0; i < DWC3_TRB_NUM; i++) {
 651                 struct dwc3_trb *trb = &dep->trb_pool[i];
 652                 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
 653
 654                 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d       %c%c\n",
 655                                 trb->bph, trb->bpl, trb->size,
 656                                 dwc3_trb_type_string(type),
 657                                 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
 658                                 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
 659                                 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
 660                                 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
 661                                 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
 662                                 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
 663                                 dep->trb_enqueue == i ? 'E' : ' ',
 664                                 dep->trb_dequeue == i ? 'D' : ' ');
 665         }
 666
 667 out:
 668         spin_unlock_irqrestore(&dwc->lock, flags);
 669
 670         return 0;
 671 }
 672
 673 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_queue);
 674 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_queue);
 675 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
 676 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
 677 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
 678 DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
 679 DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
 680 DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
 681 DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
 682
 683 static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
 684         { "tx_fifo_queue", &dwc3_tx_fifo_queue_fops, },
 685         { "rx_fifo_queue", &dwc3_rx_fifo_queue_fops, },
 686         { "tx_request_queue", &dwc3_tx_request_queue_fops, },
 687         { "rx_request_queue", &dwc3_rx_request_queue_fops, },
 688         { "rx_info_queue", &dwc3_rx_info_queue_fops, },
 689         { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
 690         { "event_queue", &dwc3_event_queue_fops, },
 691         { "transfer_type", &dwc3_transfer_type_fops, },
 692         { "trb_ring", &dwc3_trb_ring_fops, },
 693 };
 694
 695 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
 696                 struct dentry *parent)
 697 {
 698         int                     i;
 699
 700         for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
 701                 const struct file_operations *fops = dwc3_ep_file_map[i].fops;
 702                 const char *name = dwc3_ep_file_map[i].name;
 703
 704                 debugfs_create_file(name, S_IRUGO, parent, dep, fops);
 705         }
 706 }
 707
 708 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
 709                 struct dentry *parent)
 710 {
 711         struct dentry           *dir;
 712
 713         dir = debugfs_create_dir(dep->name, parent);
 714         if (IS_ERR_OR_NULL(dir))
 715                 return;
 716
 717         dwc3_debugfs_create_endpoint_files(dep, dir);
 718 }
 719
 720 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
 721                 struct dentry *parent)
 722 {
 723         int                     i;
 724
 725         for (i = 0; i < dwc->num_eps; i++) {
 726                 struct dwc3_ep  *dep = dwc->eps[i];
 727
 728                 if (!dep)
 729                         continue;
 730
 731                 dwc3_debugfs_create_endpoint_dir(dep, parent);
 732         }
 733 }
 734
 735 void dwc3_debugfs_init(struct dwc3 *dwc)
 736 {
 737         struct dentry           *root;
 738         struct dentry           *file;
 739
 740         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 741         if (IS_ERR_OR_NULL(root)) {
 742                 if (!root)
 743                         dev_err(dwc->dev, "Can't create debugfs root\n");
 744                 return;
 745         }
 746         dwc->root = root;
 747
 748         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
 749         if (!dwc->regset) {
 750                 debugfs_remove_recursive(root);
 751                 return;
 752         }
 753
 754         dwc->regset->regs = dwc3_regs;
 755         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
 756         dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
 757
 758         file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
 759         if (!file)
 760                 dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
 761
 762         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
 763                 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
 764                                 dwc, &dwc3_mode_fops);
 765                 if (!file)
 766                         dev_dbg(dwc->dev, "Can't create debugfs mode\n");
 767         }
 768
 769         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
 770                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
 771                 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
 772                                 dwc, &dwc3_testmode_fops);
 773                 if (!file)
 774                         dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
 775
 776                 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
 777                                 root, dwc, &dwc3_link_state_fops);
 778                 if (!file)
 779                         dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
 780
 781                 dwc3_debugfs_create_endpoint_dirs(dwc, root);
 782         }
 783 }
 784
 785 void dwc3_debugfs_exit(struct dwc3 *dwc)
 786 {
 787         debugfs_remove_recursive(dwc->root);
 788         kfree(dwc->regset);
 789 }