drivers/usb/dwc3/debugfs.c

   1 /**
   2  * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
   3  *
   4  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
   5  *
   6  * Authors: Felipe Balbi <balbi@ti.com>,
   7  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   8  *
   9  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2  of
  11  * the License as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/slab.h>
  21 #include <linux/ptrace.h>
  22 #include <linux/types.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/debugfs.h>
  25 #include <linux/seq_file.h>
  26 #include <linux/delay.h>
  27 #include <linux/uaccess.h>
  28
  29 #include <linux/usb/ch9.h>
  30
  31 #include "core.h"
  32 #include "gadget.h"
  33 #include "io.h"
  34 #include "debug.h"
  35
  36 #define dump_register(nm)                               \
  37 {                                                       \
  38         .name   = __stringify(nm),                      \
  39         .offset = DWC3_ ##nm,                           \
  40 }
  41
  42 #define dump_ep_register_set(n)                 \
  43         {                                       \
  44                 .name = "DEPCMDPAR2("__stringify(n)")", \
  45                 .offset = DWC3_DEP_BASE(n) +    \
  46                         DWC3_DEPCMDPAR2,        \
  47         },                                      \
  48         {                                       \
  49                 .name = "DEPCMDPAR1("__stringify(n)")", \
  50                 .offset = DWC3_DEP_BASE(n) +    \
  51                         DWC3_DEPCMDPAR1,        \
  52         },                                      \
  53         {                                       \
  54                 .name = "DEPCMDPAR0("__stringify(n)")", \
  55                 .offset = DWC3_DEP_BASE(n) +    \
  56                         DWC3_DEPCMDPAR0,        \
  57         },                                      \
  58         {                                       \
  59                 .name = "DEPCMD("__stringify(n)")",     \
  60                 .offset = DWC3_DEP_BASE(n) +    \
  61                         DWC3_DEPCMD,            \
  62         }
  63
  64
  65 static const struct debugfs_reg32 dwc3_regs[] = {
  66         dump_register(GSBUSCFG0),
  67         dump_register(GSBUSCFG1),
  68         dump_register(GTXTHRCFG),
  69         dump_register(GRXTHRCFG),
  70         dump_register(GCTL),
  71         dump_register(GEVTEN),
  72         dump_register(GSTS),
  73         dump_register(GUCTL1),
  74         dump_register(GSNPSID),
  75         dump_register(GGPIO),
  76         dump_register(GUID),
  77         dump_register(GUCTL),
  78         dump_register(GBUSERRADDR0),
  79         dump_register(GBUSERRADDR1),
  80         dump_register(GPRTBIMAP0),
  81         dump_register(GPRTBIMAP1),
  82         dump_register(GHWPARAMS0),
  83         dump_register(GHWPARAMS1),
  84         dump_register(GHWPARAMS2),
  85         dump_register(GHWPARAMS3),
  86         dump_register(GHWPARAMS4),
  87         dump_register(GHWPARAMS5),
  88         dump_register(GHWPARAMS6),
  89         dump_register(GHWPARAMS7),
  90         dump_register(GDBGFIFOSPACE),
  91         dump_register(GDBGLTSSM),
  92         dump_register(GPRTBIMAP_HS0),
  93         dump_register(GPRTBIMAP_HS1),
  94         dump_register(GPRTBIMAP_FS0),
  95         dump_register(GPRTBIMAP_FS1),
  96
  97         dump_register(GUSB2PHYCFG(0)),
  98         dump_register(GUSB2PHYCFG(1)),
  99         dump_register(GUSB2PHYCFG(2)),
 100         dump_register(GUSB2PHYCFG(3)),
 101         dump_register(GUSB2PHYCFG(4)),
 102         dump_register(GUSB2PHYCFG(5)),
 103         dump_register(GUSB2PHYCFG(6)),
 104         dump_register(GUSB2PHYCFG(7)),
 105         dump_register(GUSB2PHYCFG(8)),
 106         dump_register(GUSB2PHYCFG(9)),
 107         dump_register(GUSB2PHYCFG(10)),
 108         dump_register(GUSB2PHYCFG(11)),
 109         dump_register(GUSB2PHYCFG(12)),
 110         dump_register(GUSB2PHYCFG(13)),
 111         dump_register(GUSB2PHYCFG(14)),
 112         dump_register(GUSB2PHYCFG(15)),
 113
 114         dump_register(GUSB2I2CCTL(0)),
 115         dump_register(GUSB2I2CCTL(1)),
 116         dump_register(GUSB2I2CCTL(2)),
 117         dump_register(GUSB2I2CCTL(3)),
 118         dump_register(GUSB2I2CCTL(4)),
 119         dump_register(GUSB2I2CCTL(5)),
 120         dump_register(GUSB2I2CCTL(6)),
 121         dump_register(GUSB2I2CCTL(7)),
 122         dump_register(GUSB2I2CCTL(8)),
 123         dump_register(GUSB2I2CCTL(9)),
 124         dump_register(GUSB2I2CCTL(10)),
 125         dump_register(GUSB2I2CCTL(11)),
 126         dump_register(GUSB2I2CCTL(12)),
 127         dump_register(GUSB2I2CCTL(13)),
 128         dump_register(GUSB2I2CCTL(14)),
 129         dump_register(GUSB2I2CCTL(15)),
 130
 131         dump_register(GUSB2PHYACC(0)),
 132         dump_register(GUSB2PHYACC(1)),
 133         dump_register(GUSB2PHYACC(2)),
 134         dump_register(GUSB2PHYACC(3)),
 135         dump_register(GUSB2PHYACC(4)),
 136         dump_register(GUSB2PHYACC(5)),
 137         dump_register(GUSB2PHYACC(6)),
 138         dump_register(GUSB2PHYACC(7)),
 139         dump_register(GUSB2PHYACC(8)),
 140         dump_register(GUSB2PHYACC(9)),
 141         dump_register(GUSB2PHYACC(10)),
 142         dump_register(GUSB2PHYACC(11)),
 143         dump_register(GUSB2PHYACC(12)),
 144         dump_register(GUSB2PHYACC(13)),
 145         dump_register(GUSB2PHYACC(14)),
 146         dump_register(GUSB2PHYACC(15)),
 147
 148         dump_register(GUSB3PIPECTL(0)),
 149         dump_register(GUSB3PIPECTL(1)),
 150         dump_register(GUSB3PIPECTL(2)),
 151         dump_register(GUSB3PIPECTL(3)),
 152         dump_register(GUSB3PIPECTL(4)),
 153         dump_register(GUSB3PIPECTL(5)),
 154         dump_register(GUSB3PIPECTL(6)),
 155         dump_register(GUSB3PIPECTL(7)),
 156         dump_register(GUSB3PIPECTL(8)),
 157         dump_register(GUSB3PIPECTL(9)),
 158         dump_register(GUSB3PIPECTL(10)),
 159         dump_register(GUSB3PIPECTL(11)),
 160         dump_register(GUSB3PIPECTL(12)),
 161         dump_register(GUSB3PIPECTL(13)),
 162         dump_register(GUSB3PIPECTL(14)),
 163         dump_register(GUSB3PIPECTL(15)),
 164
 165         dump_register(GTXFIFOSIZ(0)),
 166         dump_register(GTXFIFOSIZ(1)),
 167         dump_register(GTXFIFOSIZ(2)),
 168         dump_register(GTXFIFOSIZ(3)),
 169         dump_register(GTXFIFOSIZ(4)),
 170         dump_register(GTXFIFOSIZ(5)),
 171         dump_register(GTXFIFOSIZ(6)),
 172         dump_register(GTXFIFOSIZ(7)),
 173         dump_register(GTXFIFOSIZ(8)),
 174         dump_register(GTXFIFOSIZ(9)),
 175         dump_register(GTXFIFOSIZ(10)),
 176         dump_register(GTXFIFOSIZ(11)),
 177         dump_register(GTXFIFOSIZ(12)),
 178         dump_register(GTXFIFOSIZ(13)),
 179         dump_register(GTXFIFOSIZ(14)),
 180         dump_register(GTXFIFOSIZ(15)),
 181         dump_register(GTXFIFOSIZ(16)),
 182         dump_register(GTXFIFOSIZ(17)),
 183         dump_register(GTXFIFOSIZ(18)),
 184         dump_register(GTXFIFOSIZ(19)),
 185         dump_register(GTXFIFOSIZ(20)),
 186         dump_register(GTXFIFOSIZ(21)),
 187         dump_register(GTXFIFOSIZ(22)),
 188         dump_register(GTXFIFOSIZ(23)),
 189         dump_register(GTXFIFOSIZ(24)),
 190         dump_register(GTXFIFOSIZ(25)),
 191         dump_register(GTXFIFOSIZ(26)),
 192         dump_register(GTXFIFOSIZ(27)),
 193         dump_register(GTXFIFOSIZ(28)),
 194         dump_register(GTXFIFOSIZ(29)),
 195         dump_register(GTXFIFOSIZ(30)),
 196         dump_register(GTXFIFOSIZ(31)),
 197
 198         dump_register(GRXFIFOSIZ(0)),
 199         dump_register(GRXFIFOSIZ(1)),
 200         dump_register(GRXFIFOSIZ(2)),
 201         dump_register(GRXFIFOSIZ(3)),
 202         dump_register(GRXFIFOSIZ(4)),
 203         dump_register(GRXFIFOSIZ(5)),
 204         dump_register(GRXFIFOSIZ(6)),
 205         dump_register(GRXFIFOSIZ(7)),
 206         dump_register(GRXFIFOSIZ(8)),
 207         dump_register(GRXFIFOSIZ(9)),
 208         dump_register(GRXFIFOSIZ(10)),
 209         dump_register(GRXFIFOSIZ(11)),
 210         dump_register(GRXFIFOSIZ(12)),
 211         dump_register(GRXFIFOSIZ(13)),
 212         dump_register(GRXFIFOSIZ(14)),
 213         dump_register(GRXFIFOSIZ(15)),
 214         dump_register(GRXFIFOSIZ(16)),
 215         dump_register(GRXFIFOSIZ(17)),
 216         dump_register(GRXFIFOSIZ(18)),
 217         dump_register(GRXFIFOSIZ(19)),
 218         dump_register(GRXFIFOSIZ(20)),
 219         dump_register(GRXFIFOSIZ(21)),
 220         dump_register(GRXFIFOSIZ(22)),
 221         dump_register(GRXFIFOSIZ(23)),
 222         dump_register(GRXFIFOSIZ(24)),
 223         dump_register(GRXFIFOSIZ(25)),
 224         dump_register(GRXFIFOSIZ(26)),
 225         dump_register(GRXFIFOSIZ(27)),
 226         dump_register(GRXFIFOSIZ(28)),
 227         dump_register(GRXFIFOSIZ(29)),
 228         dump_register(GRXFIFOSIZ(30)),
 229         dump_register(GRXFIFOSIZ(31)),
 230
 231         dump_register(GEVNTADRLO(0)),
 232         dump_register(GEVNTADRHI(0)),
 233         dump_register(GEVNTSIZ(0)),
 234         dump_register(GEVNTCOUNT(0)),
 235
 236         dump_register(GHWPARAMS8),
 237         dump_register(DCFG),
 238         dump_register(DCTL),
 239         dump_register(DEVTEN),
 240         dump_register(DSTS),
 241         dump_register(DGCMDPAR),
 242         dump_register(DGCMD),
 243         dump_register(DALEPENA),
 244
 245         dump_ep_register_set(0),
 246         dump_ep_register_set(1),
 247         dump_ep_register_set(2),
 248         dump_ep_register_set(3),
 249         dump_ep_register_set(4),
 250         dump_ep_register_set(5),
 251         dump_ep_register_set(6),
 252         dump_ep_register_set(7),
 253         dump_ep_register_set(8),
 254         dump_ep_register_set(9),
 255         dump_ep_register_set(10),
 256         dump_ep_register_set(11),
 257         dump_ep_register_set(12),
 258         dump_ep_register_set(13),
 259         dump_ep_register_set(14),
 260         dump_ep_register_set(15),
 261         dump_ep_register_set(16),
 262         dump_ep_register_set(17),
 263         dump_ep_register_set(18),
 264         dump_ep_register_set(19),
 265         dump_ep_register_set(20),
 266         dump_ep_register_set(21),
 267         dump_ep_register_set(22),
 268         dump_ep_register_set(23),
 269         dump_ep_register_set(24),
 270         dump_ep_register_set(25),
 271         dump_ep_register_set(26),
 272         dump_ep_register_set(27),
 273         dump_ep_register_set(28),
 274         dump_ep_register_set(29),
 275         dump_ep_register_set(30),
 276         dump_ep_register_set(31),
 277
 278         dump_register(OCFG),
 279         dump_register(OCTL),
 280         dump_register(OEVT),
 281         dump_register(OEVTEN),
 282         dump_register(OSTS),
 283 };
 284
 285 static int dwc3_mode_show(struct seq_file *s, void *unused)
 286 {
 287         struct dwc3             *dwc = s->private;
 288         unsigned long           flags;
 289         u32                     reg;
 290
 291         spin_lock_irqsave(&dwc->lock, flags);
 292         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 293         spin_unlock_irqrestore(&dwc->lock, flags);
 294
 295         switch (DWC3_GCTL_PRTCAP(reg)) {
 296         case DWC3_GCTL_PRTCAP_HOST:
 297                 seq_printf(s, "host\n");
 298                 break;
 299         case DWC3_GCTL_PRTCAP_DEVICE:
 300                 seq_printf(s, "device\n");
 301                 break;
 302         case DWC3_GCTL_PRTCAP_OTG:
 303                 seq_printf(s, "OTG\n");
 304                 break;
 305         default:
 306                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 307         }
 308
 309         return 0;
 310 }
 311
 312 static int dwc3_mode_open(struct inode *inode, struct file *file)
 313 {
 314         return single_open(file, dwc3_mode_show, inode->i_private);
 315 }
 316
 317 static ssize_t dwc3_mode_write(struct file *file,
 318                 const char __user *ubuf, size_t count, loff_t *ppos)
 319 {
 320         struct seq_file         *s = file->private_data;
 321         struct dwc3             *dwc = s->private;
 322         unsigned long           flags;
 323         u32                     mode = 0;
 324         char                    buf[32];
 325
 326         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 327                 return -EFAULT;
 328
 329         if (!strncmp(buf, "host", 4))
 330                 mode |= DWC3_GCTL_PRTCAP_HOST;
 331
 332         if (!strncmp(buf, "device", 6))
 333                 mode |= DWC3_GCTL_PRTCAP_DEVICE;
 334
 335         if (!strncmp(buf, "otg", 3))
 336                 mode |= DWC3_GCTL_PRTCAP_OTG;
 337
 338         if (mode) {
 339                 spin_lock_irqsave(&dwc->lock, flags);
 340                 dwc3_set_mode(dwc, mode);
 341                 spin_unlock_irqrestore(&dwc->lock, flags);
 342         }
 343         return count;
 344 }
 345
 346 static const struct file_operations dwc3_mode_fops = {
 347         .open                   = dwc3_mode_open,
 348         .write                  = dwc3_mode_write,
 349         .read                   = seq_read,
 350         .llseek                 = seq_lseek,
 351         .release                = single_release,
 352 };
 353
 354 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 355 {
 356         struct dwc3             *dwc = s->private;
 357         unsigned long           flags;
 358         u32                     reg;
 359
 360         spin_lock_irqsave(&dwc->lock, flags);
 361         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 362         reg &= DWC3_DCTL_TSTCTRL_MASK;
 363         reg >>= 1;
 364         spin_unlock_irqrestore(&dwc->lock, flags);
 365
 366         switch (reg) {
 367         case 0:
 368                 seq_printf(s, "no test\n");
 369                 break;
 370         case TEST_J:
 371                 seq_printf(s, "test_j\n");
 372                 break;
 373         case TEST_K:
 374                 seq_printf(s, "test_k\n");
 375                 break;
 376         case TEST_SE0_NAK:
 377                 seq_printf(s, "test_se0_nak\n");
 378                 break;
 379         case TEST_PACKET:
 380                 seq_printf(s, "test_packet\n");
 381                 break;
 382         case TEST_FORCE_EN:
 383                 seq_printf(s, "test_force_enable\n");
 384                 break;
 385         default:
 386                 seq_printf(s, "UNKNOWN %d\n", reg);
 387         }
 388
 389         return 0;
 390 }
 391
 392 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 393 {
 394         return single_open(file, dwc3_testmode_show, inode->i_private);
 395 }
 396
 397 static ssize_t dwc3_testmode_write(struct file *file,
 398                 const char __user *ubuf, size_t count, loff_t *ppos)
 399 {
 400         struct seq_file         *s = file->private_data;
 401         struct dwc3             *dwc = s->private;
 402         unsigned long           flags;
 403         u32                     testmode = 0;
 404         char                    buf[32];
 405
 406         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 407                 return -EFAULT;
 408
 409         if (!strncmp(buf, "test_j", 6))
 410                 testmode = TEST_J;
 411         else if (!strncmp(buf, "test_k", 6))
 412                 testmode = TEST_K;
 413         else if (!strncmp(buf, "test_se0_nak", 12))
 414                 testmode = TEST_SE0_NAK;
 415         else if (!strncmp(buf, "test_packet", 11))
 416                 testmode = TEST_PACKET;
 417         else if (!strncmp(buf, "test_force_enable", 17))
 418                 testmode = TEST_FORCE_EN;
 419         else
 420                 testmode = 0;
 421
 422         spin_lock_irqsave(&dwc->lock, flags);
 423         dwc3_gadget_set_test_mode(dwc, testmode);
 424         spin_unlock_irqrestore(&dwc->lock, flags);
 425
 426         return count;
 427 }
 428
 429 static const struct file_operations dwc3_testmode_fops = {
 430         .open                   = dwc3_testmode_open,
 431         .write                  = dwc3_testmode_write,
 432         .read                   = seq_read,
 433         .llseek                 = seq_lseek,
 434         .release                = single_release,
 435 };
 436
 437 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 438 {
 439         struct dwc3             *dwc = s->private;
 440         unsigned long           flags;
 441         enum dwc3_link_state    state;
 442         u32                     reg;
 443
 444         spin_lock_irqsave(&dwc->lock, flags);
 445         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 446         state = DWC3_DSTS_USBLNKST(reg);
 447         spin_unlock_irqrestore(&dwc->lock, flags);
 448
 449         switch (state) {
 450         case DWC3_LINK_STATE_U0:
 451                 seq_printf(s, "U0\n");
 452                 break;
 453         case DWC3_LINK_STATE_U1:
 454                 seq_printf(s, "U1\n");
 455                 break;
 456         case DWC3_LINK_STATE_U2:
 457                 seq_printf(s, "U2\n");
 458                 break;
 459         case DWC3_LINK_STATE_U3:
 460                 seq_printf(s, "U3\n");
 461                 break;
 462         case DWC3_LINK_STATE_SS_DIS:
 463                 seq_printf(s, "SS.Disabled\n");
 464                 break;
 465         case DWC3_LINK_STATE_RX_DET:
 466                 seq_printf(s, "Rx.Detect\n");
 467                 break;
 468         case DWC3_LINK_STATE_SS_INACT:
 469                 seq_printf(s, "SS.Inactive\n");
 470                 break;
 471         case DWC3_LINK_STATE_POLL:
 472                 seq_printf(s, "Poll\n");
 473                 break;
 474         case DWC3_LINK_STATE_RECOV:
 475                 seq_printf(s, "Recovery\n");
 476                 break;
 477         case DWC3_LINK_STATE_HRESET:
 478                 seq_printf(s, "HRESET\n");
 479                 break;
 480         case DWC3_LINK_STATE_CMPLY:
 481                 seq_printf(s, "Compliance\n");
 482                 break;
 483         case DWC3_LINK_STATE_LPBK:
 484                 seq_printf(s, "Loopback\n");
 485                 break;
 486         case DWC3_LINK_STATE_RESET:
 487                 seq_printf(s, "Reset\n");
 488                 break;
 489         case DWC3_LINK_STATE_RESUME:
 490                 seq_printf(s, "Resume\n");
 491                 break;
 492         default:
 493                 seq_printf(s, "UNKNOWN %d\n", state);
 494         }
 495
 496         return 0;
 497 }
 498
 499 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 500 {
 501         return single_open(file, dwc3_link_state_show, inode->i_private);
 502 }
 503
 504 static ssize_t dwc3_link_state_write(struct file *file,
 505                 const char __user *ubuf, size_t count, loff_t *ppos)
 506 {
 507         struct seq_file         *s = file->private_data;
 508         struct dwc3             *dwc = s->private;
 509         unsigned long           flags;
 510         enum dwc3_link_state    state = 0;
 511         char                    buf[32];
 512
 513         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 514                 return -EFAULT;
 515
 516         if (!strncmp(buf, "SS.Disabled", 11))
 517                 state = DWC3_LINK_STATE_SS_DIS;
 518         else if (!strncmp(buf, "Rx.Detect", 9))
 519                 state = DWC3_LINK_STATE_RX_DET;
 520         else if (!strncmp(buf, "SS.Inactive", 11))
 521                 state = DWC3_LINK_STATE_SS_INACT;
 522         else if (!strncmp(buf, "Recovery", 8))
 523                 state = DWC3_LINK_STATE_RECOV;
 524         else if (!strncmp(buf, "Compliance", 10))
 525                 state = DWC3_LINK_STATE_CMPLY;
 526         else if (!strncmp(buf, "Loopback", 8))
 527                 state = DWC3_LINK_STATE_LPBK;
 528         else
 529                 return -EINVAL;
 530
 531         spin_lock_irqsave(&dwc->lock, flags);
 532         dwc3_gadget_set_link_state(dwc, state);
 533         spin_unlock_irqrestore(&dwc->lock, flags);
 534
 535         return count;
 536 }
 537
 538 static const struct file_operations dwc3_link_state_fops = {
 539         .open                   = dwc3_link_state_open,
 540         .write                  = dwc3_link_state_write,
 541         .read                   = seq_read,
 542         .llseek                 = seq_lseek,
 543         .release                = single_release,
 544 };
 545
 546 struct dwc3_ep_file_map {
 547         char name[25];
 548         int (*show)(struct seq_file *s, void *unused);
 549 };
 550
 551 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
 552 {
 553         struct dwc3_ep          *dep = s->private;
 554         struct dwc3             *dwc = dep->dwc;
 555         unsigned long           flags;
 556         u32                     val;
 557
 558         spin_lock_irqsave(&dwc->lock, flags);
 559         val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
 560         seq_printf(s, "%u\n", val);
 561         spin_unlock_irqrestore(&dwc->lock, flags);
 562
 563         return 0;
 564 }
 565
 566 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
 567 {
 568         struct dwc3_ep          *dep = s->private;
 569         struct dwc3             *dwc = dep->dwc;
 570         unsigned long           flags;
 571         u32                     val;
 572
 573         spin_lock_irqsave(&dwc->lock, flags);
 574         val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
 575         seq_printf(s, "%u\n", val);
 576         spin_unlock_irqrestore(&dwc->lock, flags);
 577
 578         return 0;
 579 }
 580
 581 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
 582 {
 583         struct dwc3_ep          *dep = s->private;
 584         struct dwc3             *dwc = dep->dwc;
 585         unsigned long           flags;
 586         u32                     val;
 587
 588         spin_lock_irqsave(&dwc->lock, flags);
 589         val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
 590         seq_printf(s, "%u\n", val);
 591         spin_unlock_irqrestore(&dwc->lock, flags);
 592
 593         return 0;
 594 }
 595
 596 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
 597 {
 598         struct dwc3_ep          *dep = s->private;
 599         struct dwc3             *dwc = dep->dwc;
 600         unsigned long           flags;
 601         u32                     val;
 602
 603         spin_lock_irqsave(&dwc->lock, flags);
 604         val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
 605         seq_printf(s, "%u\n", val);
 606         spin_unlock_irqrestore(&dwc->lock, flags);
 607
 608         return 0;
 609 }
 610
 611 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
 612 {
 613         struct dwc3_ep          *dep = s->private;
 614         struct dwc3             *dwc = dep->dwc;
 615         unsigned long           flags;
 616         u32                     val;
 617
 618         spin_lock_irqsave(&dwc->lock, flags);
 619         val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
 620         seq_printf(s, "%u\n", val);
 621         spin_unlock_irqrestore(&dwc->lock, flags);
 622
 623         return 0;
 624 }
 625
 626 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
 627 {
 628         struct dwc3_ep          *dep = s->private;
 629         struct dwc3             *dwc = dep->dwc;
 630         unsigned long           flags;
 631         u32                     val;
 632
 633         spin_lock_irqsave(&dwc->lock, flags);
 634         val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
 635         seq_printf(s, "%u\n", val);
 636         spin_unlock_irqrestore(&dwc->lock, flags);
 637
 638         return 0;
 639 }
 640
 641 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
 642 {
 643         struct dwc3_ep          *dep = s->private;
 644         struct dwc3             *dwc = dep->dwc;
 645         unsigned long           flags;
 646         u32                     val;
 647
 648         spin_lock_irqsave(&dwc->lock, flags);
 649         val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
 650         seq_printf(s, "%u\n", val);
 651         spin_unlock_irqrestore(&dwc->lock, flags);
 652
 653         return 0;
 654 }
 655
 656 static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused)
 657 {
 658         struct dwc3_ep          *dep = s->private;
 659         struct dwc3             *dwc = dep->dwc;
 660         unsigned long           flags;
 661
 662         spin_lock_irqsave(&dwc->lock, flags);
 663         if (!(dep->flags & DWC3_EP_ENABLED) ||
 664                         !dep->endpoint.desc) {
 665                 seq_printf(s, "--\n");
 666                 goto out;
 667         }
 668
 669         switch (usb_endpoint_type(dep->endpoint.desc)) {
 670         case USB_ENDPOINT_XFER_CONTROL:
 671                 seq_printf(s, "control\n");
 672                 break;
 673         case USB_ENDPOINT_XFER_ISOC:
 674                 seq_printf(s, "isochronous\n");
 675                 break;
 676         case USB_ENDPOINT_XFER_BULK:
 677                 seq_printf(s, "bulk\n");
 678                 break;
 679         case USB_ENDPOINT_XFER_INT:
 680                 seq_printf(s, "interrupt\n");
 681                 break;
 682         default:
 683                 seq_printf(s, "--\n");
 684         }
 685
 686 out:
 687         spin_unlock_irqrestore(&dwc->lock, flags);
 688
 689         return 0;
 690 }
 691
 692 static inline const char *dwc3_trb_type_string(struct dwc3_trb *trb)
 693 {
 694         switch (DWC3_TRBCTL_TYPE(trb->ctrl)) {
 695         case DWC3_TRBCTL_NORMAL:
 696                 return "normal";
 697         case DWC3_TRBCTL_CONTROL_SETUP:
 698                 return "control-setup";
 699         case DWC3_TRBCTL_CONTROL_STATUS2:
 700                 return "control-status2";
 701         case DWC3_TRBCTL_CONTROL_STATUS3:
 702                 return "control-status3";
 703         case DWC3_TRBCTL_CONTROL_DATA:
 704                 return "control-data";
 705         case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
 706                 return "isoc-first";
 707         case DWC3_TRBCTL_ISOCHRONOUS:
 708                 return "isoc";
 709         case DWC3_TRBCTL_LINK_TRB:
 710                 return "link";
 711         default:
 712                 return "UNKNOWN";
 713         }
 714 }
 715
 716 static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused)
 717 {
 718         struct dwc3_ep          *dep = s->private;
 719         struct dwc3             *dwc = dep->dwc;
 720         unsigned long           flags;
 721         int                     i;
 722
 723         spin_lock_irqsave(&dwc->lock, flags);
 724         if (dep->number <= 1) {
 725                 seq_printf(s, "--\n");
 726                 goto out;
 727         }
 728
 729         seq_printf(s, "enqueue pointer %d\n", dep->trb_enqueue);
 730         seq_printf(s, "dequeue pointer %d\n", dep->trb_dequeue);
 731         seq_printf(s, "\n--------------------------------------------------\n\n");
 732         seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
 733
 734         for (i = 0; i < DWC3_TRB_NUM; i++) {
 735                 struct dwc3_trb *trb = &dep->trb_pool[i];
 736
 737                 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d\n",
 738                                 trb->bph, trb->bpl, trb->size,
 739                                 dwc3_trb_type_string(trb),
 740                                 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
 741                                 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
 742                                 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
 743                                 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
 744                                 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
 745                                 !!(trb->ctrl & DWC3_TRB_CTRL_HWO));
 746         }
 747
 748 out:
 749         spin_unlock_irqrestore(&dwc->lock, flags);
 750
 751         return 0;
 752 }
 753
 754 static struct dwc3_ep_file_map map[] = {
 755         { "tx_fifo_queue", dwc3_tx_fifo_queue_show, },
 756         { "rx_fifo_queue", dwc3_rx_fifo_queue_show, },
 757         { "tx_request_queue", dwc3_tx_request_queue_show, },
 758         { "rx_request_queue", dwc3_rx_request_queue_show, },
 759         { "rx_info_queue", dwc3_rx_info_queue_show, },
 760         { "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, },
 761         { "event_queue", dwc3_event_queue_show, },
 762         { "transfer_type", dwc3_ep_transfer_type_show, },
 763         { "trb_ring", dwc3_ep_trb_ring_show, },
 764 };
 765
 766 static int dwc3_endpoint_open(struct inode *inode, struct file *file)
 767 {
 768         const char              *file_name = file_dentry(file)->d_iname;
 769         struct dwc3_ep_file_map *f_map;
 770         int                     i;
 771
 772         for (i = 0; i < ARRAY_SIZE(map); i++) {
 773                 f_map = &map[i];
 774
 775                 if (strcmp(f_map->name, file_name) == 0)
 776                         break;
 777         }
 778
 779         return single_open(file, f_map->show, inode->i_private);
 780 }
 781
 782 static const struct file_operations dwc3_endpoint_fops = {
 783         .open                   = dwc3_endpoint_open,
 784         .read                   = seq_read,
 785         .llseek                 = seq_lseek,
 786         .release                = single_release,
 787 };
 788
 789 static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
 790                 struct dentry *parent, int type)
 791 {
 792         struct dentry           *file;
 793         struct dwc3_ep_file_map *ep_file = &map[type];
 794
 795         file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep,
 796                         &dwc3_endpoint_fops);
 797 }
 798
 799 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
 800                 struct dentry *parent)
 801 {
 802         int                     i;
 803
 804         for (i = 0; i < ARRAY_SIZE(map); i++)
 805                 dwc3_debugfs_create_endpoint_file(dep, parent, i);
 806 }
 807
 808 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
 809                 struct dentry *parent)
 810 {
 811         struct dentry           *dir;
 812
 813         dir = debugfs_create_dir(dep->name, parent);
 814         if (IS_ERR_OR_NULL(dir))
 815                 return;
 816
 817         dwc3_debugfs_create_endpoint_files(dep, dir);
 818 }
 819
 820 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
 821                 struct dentry *parent)
 822 {
 823         int                     i;
 824
 825         for (i = 0; i < dwc->num_in_eps; i++) {
 826                 u8              epnum = (i << 1) | 1;
 827                 struct dwc3_ep  *dep = dwc->eps[epnum];
 828
 829                 if (!dep)
 830                         continue;
 831
 832                 dwc3_debugfs_create_endpoint_dir(dep, parent);
 833         }
 834
 835         for (i = 0; i < dwc->num_out_eps; i++) {
 836                 u8              epnum = (i << 1);
 837                 struct dwc3_ep  *dep = dwc->eps[epnum];
 838
 839                 if (!dep)
 840                         continue;
 841
 842                 dwc3_debugfs_create_endpoint_dir(dep, parent);
 843         }
 844 }
 845
 846 void dwc3_debugfs_init(struct dwc3 *dwc)
 847 {
 848         struct dentry           *root;
 849         struct dentry           *file;
 850
 851         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 852         if (IS_ERR_OR_NULL(root)) {
 853                 if (!root)
 854                         dev_err(dwc->dev, "Can't create debugfs root\n");
 855                 return;
 856         }
 857         dwc->root = root;
 858
 859         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
 860         if (!dwc->regset) {
 861                 debugfs_remove_recursive(root);
 862                 return;
 863         }
 864
 865         dwc->regset->regs = dwc3_regs;
 866         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
 867         dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
 868
 869         file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
 870         if (!file)
 871                 dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
 872
 873         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
 874                 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
 875                                 dwc, &dwc3_mode_fops);
 876                 if (!file)
 877                         dev_dbg(dwc->dev, "Can't create debugfs mode\n");
 878         }
 879
 880         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
 881                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
 882                 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
 883                                 dwc, &dwc3_testmode_fops);
 884                 if (!file)
 885                         dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
 886
 887                 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
 888                                 root, dwc, &dwc3_link_state_fops);
 889                 if (!file)
 890                         dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
 891
 892                 dwc3_debugfs_create_endpoint_dirs(dwc, root);
 893         }
 894 }
 895
 896 void dwc3_debugfs_exit(struct dwc3 *dwc)
 897 {
 898         debugfs_remove_recursive(dwc->root);
 899         kfree(dwc->regset);
 900 }