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/module.h>
  20 #include <linux/kernel.h>
  21 #include <linux/slab.h>
  22 #include <linux/ptrace.h>
  23 #include <linux/types.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/debugfs.h>
  26 #include <linux/seq_file.h>
  27 #include <linux/delay.h>
  28 #include <linux/uaccess.h>
  29
  30 #include <linux/usb/ch9.h>
  31
  32 #include "core.h"
  33 #include "gadget.h"
  34 #include "io.h"
  35 #include "debug.h"
  36
  37 #define dump_register(nm)                               \
  38 {                                                       \
  39         .name   = __stringify(nm),                      \
  40         .offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \
  41 }
  42
  43 #define ep_event_rate(ev, c, p, dt)     \
  44         ((dt) ? ((c.ev - p.ev) * (MSEC_PER_SEC)) / (dt) : 0)
  45
  46 static const struct debugfs_reg32 dwc3_regs[] = {
  47         dump_register(GSBUSCFG0),
  48         dump_register(GSBUSCFG1),
  49         dump_register(GTXTHRCFG),
  50         dump_register(GRXTHRCFG),
  51         dump_register(GCTL),
  52         dump_register(GEVTEN),
  53         dump_register(GSTS),
  54         dump_register(GSNPSID),
  55         dump_register(GGPIO),
  56         dump_register(GUID),
  57         dump_register(GUCTL),
  58         dump_register(GBUSERRADDR0),
  59         dump_register(GBUSERRADDR1),
  60         dump_register(GPRTBIMAP0),
  61         dump_register(GPRTBIMAP1),
  62         dump_register(GHWPARAMS0),
  63         dump_register(GHWPARAMS1),
  64         dump_register(GHWPARAMS2),
  65         dump_register(GHWPARAMS3),
  66         dump_register(GHWPARAMS4),
  67         dump_register(GHWPARAMS5),
  68         dump_register(GHWPARAMS6),
  69         dump_register(GHWPARAMS7),
  70         dump_register(GDBGFIFOSPACE),
  71         dump_register(GDBGLTSSM),
  72         dump_register(GPRTBIMAP_HS0),
  73         dump_register(GPRTBIMAP_HS1),
  74         dump_register(GPRTBIMAP_FS0),
  75         dump_register(GPRTBIMAP_FS1),
  76
  77         dump_register(GUSB2PHYCFG(0)),
  78         dump_register(GUSB2PHYCFG(1)),
  79         dump_register(GUSB2PHYCFG(2)),
  80         dump_register(GUSB2PHYCFG(3)),
  81         dump_register(GUSB2PHYCFG(4)),
  82         dump_register(GUSB2PHYCFG(5)),
  83         dump_register(GUSB2PHYCFG(6)),
  84         dump_register(GUSB2PHYCFG(7)),
  85         dump_register(GUSB2PHYCFG(8)),
  86         dump_register(GUSB2PHYCFG(9)),
  87         dump_register(GUSB2PHYCFG(10)),
  88         dump_register(GUSB2PHYCFG(11)),
  89         dump_register(GUSB2PHYCFG(12)),
  90         dump_register(GUSB2PHYCFG(13)),
  91         dump_register(GUSB2PHYCFG(14)),
  92         dump_register(GUSB2PHYCFG(15)),
  93
  94         dump_register(GUSB2I2CCTL(0)),
  95         dump_register(GUSB2I2CCTL(1)),
  96         dump_register(GUSB2I2CCTL(2)),
  97         dump_register(GUSB2I2CCTL(3)),
  98         dump_register(GUSB2I2CCTL(4)),
  99         dump_register(GUSB2I2CCTL(5)),
 100         dump_register(GUSB2I2CCTL(6)),
 101         dump_register(GUSB2I2CCTL(7)),
 102         dump_register(GUSB2I2CCTL(8)),
 103         dump_register(GUSB2I2CCTL(9)),
 104         dump_register(GUSB2I2CCTL(10)),
 105         dump_register(GUSB2I2CCTL(11)),
 106         dump_register(GUSB2I2CCTL(12)),
 107         dump_register(GUSB2I2CCTL(13)),
 108         dump_register(GUSB2I2CCTL(14)),
 109         dump_register(GUSB2I2CCTL(15)),
 110
 111         dump_register(GUSB2PHYACC(0)),
 112         dump_register(GUSB2PHYACC(1)),
 113         dump_register(GUSB2PHYACC(2)),
 114         dump_register(GUSB2PHYACC(3)),
 115         dump_register(GUSB2PHYACC(4)),
 116         dump_register(GUSB2PHYACC(5)),
 117         dump_register(GUSB2PHYACC(6)),
 118         dump_register(GUSB2PHYACC(7)),
 119         dump_register(GUSB2PHYACC(8)),
 120         dump_register(GUSB2PHYACC(9)),
 121         dump_register(GUSB2PHYACC(10)),
 122         dump_register(GUSB2PHYACC(11)),
 123         dump_register(GUSB2PHYACC(12)),
 124         dump_register(GUSB2PHYACC(13)),
 125         dump_register(GUSB2PHYACC(14)),
 126         dump_register(GUSB2PHYACC(15)),
 127
 128         dump_register(GUSB3PIPECTL(0)),
 129         dump_register(GUSB3PIPECTL(1)),
 130         dump_register(GUSB3PIPECTL(2)),
 131         dump_register(GUSB3PIPECTL(3)),
 132         dump_register(GUSB3PIPECTL(4)),
 133         dump_register(GUSB3PIPECTL(5)),
 134         dump_register(GUSB3PIPECTL(6)),
 135         dump_register(GUSB3PIPECTL(7)),
 136         dump_register(GUSB3PIPECTL(8)),
 137         dump_register(GUSB3PIPECTL(9)),
 138         dump_register(GUSB3PIPECTL(10)),
 139         dump_register(GUSB3PIPECTL(11)),
 140         dump_register(GUSB3PIPECTL(12)),
 141         dump_register(GUSB3PIPECTL(13)),
 142         dump_register(GUSB3PIPECTL(14)),
 143         dump_register(GUSB3PIPECTL(15)),
 144
 145         dump_register(GTXFIFOSIZ(0)),
 146         dump_register(GTXFIFOSIZ(1)),
 147         dump_register(GTXFIFOSIZ(2)),
 148         dump_register(GTXFIFOSIZ(3)),
 149         dump_register(GTXFIFOSIZ(4)),
 150         dump_register(GTXFIFOSIZ(5)),
 151         dump_register(GTXFIFOSIZ(6)),
 152         dump_register(GTXFIFOSIZ(7)),
 153         dump_register(GTXFIFOSIZ(8)),
 154         dump_register(GTXFIFOSIZ(9)),
 155         dump_register(GTXFIFOSIZ(10)),
 156         dump_register(GTXFIFOSIZ(11)),
 157         dump_register(GTXFIFOSIZ(12)),
 158         dump_register(GTXFIFOSIZ(13)),
 159         dump_register(GTXFIFOSIZ(14)),
 160         dump_register(GTXFIFOSIZ(15)),
 161         dump_register(GTXFIFOSIZ(16)),
 162         dump_register(GTXFIFOSIZ(17)),
 163         dump_register(GTXFIFOSIZ(18)),
 164         dump_register(GTXFIFOSIZ(19)),
 165         dump_register(GTXFIFOSIZ(20)),
 166         dump_register(GTXFIFOSIZ(21)),
 167         dump_register(GTXFIFOSIZ(22)),
 168         dump_register(GTXFIFOSIZ(23)),
 169         dump_register(GTXFIFOSIZ(24)),
 170         dump_register(GTXFIFOSIZ(25)),
 171         dump_register(GTXFIFOSIZ(26)),
 172         dump_register(GTXFIFOSIZ(27)),
 173         dump_register(GTXFIFOSIZ(28)),
 174         dump_register(GTXFIFOSIZ(29)),
 175         dump_register(GTXFIFOSIZ(30)),
 176         dump_register(GTXFIFOSIZ(31)),
 177
 178         dump_register(GRXFIFOSIZ(0)),
 179         dump_register(GRXFIFOSIZ(1)),
 180         dump_register(GRXFIFOSIZ(2)),
 181         dump_register(GRXFIFOSIZ(3)),
 182         dump_register(GRXFIFOSIZ(4)),
 183         dump_register(GRXFIFOSIZ(5)),
 184         dump_register(GRXFIFOSIZ(6)),
 185         dump_register(GRXFIFOSIZ(7)),
 186         dump_register(GRXFIFOSIZ(8)),
 187         dump_register(GRXFIFOSIZ(9)),
 188         dump_register(GRXFIFOSIZ(10)),
 189         dump_register(GRXFIFOSIZ(11)),
 190         dump_register(GRXFIFOSIZ(12)),
 191         dump_register(GRXFIFOSIZ(13)),
 192         dump_register(GRXFIFOSIZ(14)),
 193         dump_register(GRXFIFOSIZ(15)),
 194         dump_register(GRXFIFOSIZ(16)),
 195         dump_register(GRXFIFOSIZ(17)),
 196         dump_register(GRXFIFOSIZ(18)),
 197         dump_register(GRXFIFOSIZ(19)),
 198         dump_register(GRXFIFOSIZ(20)),
 199         dump_register(GRXFIFOSIZ(21)),
 200         dump_register(GRXFIFOSIZ(22)),
 201         dump_register(GRXFIFOSIZ(23)),
 202         dump_register(GRXFIFOSIZ(24)),
 203         dump_register(GRXFIFOSIZ(25)),
 204         dump_register(GRXFIFOSIZ(26)),
 205         dump_register(GRXFIFOSIZ(27)),
 206         dump_register(GRXFIFOSIZ(28)),
 207         dump_register(GRXFIFOSIZ(29)),
 208         dump_register(GRXFIFOSIZ(30)),
 209         dump_register(GRXFIFOSIZ(31)),
 210
 211         dump_register(GEVNTADRLO(0)),
 212         dump_register(GEVNTADRHI(0)),
 213         dump_register(GEVNTSIZ(0)),
 214         dump_register(GEVNTCOUNT(0)),
 215
 216         dump_register(GHWPARAMS8),
 217         dump_register(GFLADJ),
 218         dump_register(DCFG),
 219         dump_register(DCTL),
 220         dump_register(DEVTEN),
 221         dump_register(DSTS),
 222         dump_register(DGCMDPAR),
 223         dump_register(DGCMD),
 224         dump_register(DALEPENA),
 225
 226         dump_register(DEPCMDPAR2(0)),
 227         dump_register(DEPCMDPAR2(1)),
 228         dump_register(DEPCMDPAR2(2)),
 229         dump_register(DEPCMDPAR2(3)),
 230         dump_register(DEPCMDPAR2(4)),
 231         dump_register(DEPCMDPAR2(5)),
 232         dump_register(DEPCMDPAR2(6)),
 233         dump_register(DEPCMDPAR2(7)),
 234         dump_register(DEPCMDPAR2(8)),
 235         dump_register(DEPCMDPAR2(9)),
 236         dump_register(DEPCMDPAR2(10)),
 237         dump_register(DEPCMDPAR2(11)),
 238         dump_register(DEPCMDPAR2(12)),
 239         dump_register(DEPCMDPAR2(13)),
 240         dump_register(DEPCMDPAR2(14)),
 241         dump_register(DEPCMDPAR2(15)),
 242         dump_register(DEPCMDPAR2(16)),
 243         dump_register(DEPCMDPAR2(17)),
 244         dump_register(DEPCMDPAR2(18)),
 245         dump_register(DEPCMDPAR2(19)),
 246         dump_register(DEPCMDPAR2(20)),
 247         dump_register(DEPCMDPAR2(21)),
 248         dump_register(DEPCMDPAR2(22)),
 249         dump_register(DEPCMDPAR2(23)),
 250         dump_register(DEPCMDPAR2(24)),
 251         dump_register(DEPCMDPAR2(25)),
 252         dump_register(DEPCMDPAR2(26)),
 253         dump_register(DEPCMDPAR2(27)),
 254         dump_register(DEPCMDPAR2(28)),
 255         dump_register(DEPCMDPAR2(29)),
 256         dump_register(DEPCMDPAR2(30)),
 257         dump_register(DEPCMDPAR2(31)),
 258
 259         dump_register(DEPCMDPAR1(0)),
 260         dump_register(DEPCMDPAR1(1)),
 261         dump_register(DEPCMDPAR1(2)),
 262         dump_register(DEPCMDPAR1(3)),
 263         dump_register(DEPCMDPAR1(4)),
 264         dump_register(DEPCMDPAR1(5)),
 265         dump_register(DEPCMDPAR1(6)),
 266         dump_register(DEPCMDPAR1(7)),
 267         dump_register(DEPCMDPAR1(8)),
 268         dump_register(DEPCMDPAR1(9)),
 269         dump_register(DEPCMDPAR1(10)),
 270         dump_register(DEPCMDPAR1(11)),
 271         dump_register(DEPCMDPAR1(12)),
 272         dump_register(DEPCMDPAR1(13)),
 273         dump_register(DEPCMDPAR1(14)),
 274         dump_register(DEPCMDPAR1(15)),
 275         dump_register(DEPCMDPAR1(16)),
 276         dump_register(DEPCMDPAR1(17)),
 277         dump_register(DEPCMDPAR1(18)),
 278         dump_register(DEPCMDPAR1(19)),
 279         dump_register(DEPCMDPAR1(20)),
 280         dump_register(DEPCMDPAR1(21)),
 281         dump_register(DEPCMDPAR1(22)),
 282         dump_register(DEPCMDPAR1(23)),
 283         dump_register(DEPCMDPAR1(24)),
 284         dump_register(DEPCMDPAR1(25)),
 285         dump_register(DEPCMDPAR1(26)),
 286         dump_register(DEPCMDPAR1(27)),
 287         dump_register(DEPCMDPAR1(28)),
 288         dump_register(DEPCMDPAR1(29)),
 289         dump_register(DEPCMDPAR1(30)),
 290         dump_register(DEPCMDPAR1(31)),
 291
 292         dump_register(DEPCMDPAR0(0)),
 293         dump_register(DEPCMDPAR0(1)),
 294         dump_register(DEPCMDPAR0(2)),
 295         dump_register(DEPCMDPAR0(3)),
 296         dump_register(DEPCMDPAR0(4)),
 297         dump_register(DEPCMDPAR0(5)),
 298         dump_register(DEPCMDPAR0(6)),
 299         dump_register(DEPCMDPAR0(7)),
 300         dump_register(DEPCMDPAR0(8)),
 301         dump_register(DEPCMDPAR0(9)),
 302         dump_register(DEPCMDPAR0(10)),
 303         dump_register(DEPCMDPAR0(11)),
 304         dump_register(DEPCMDPAR0(12)),
 305         dump_register(DEPCMDPAR0(13)),
 306         dump_register(DEPCMDPAR0(14)),
 307         dump_register(DEPCMDPAR0(15)),
 308         dump_register(DEPCMDPAR0(16)),
 309         dump_register(DEPCMDPAR0(17)),
 310         dump_register(DEPCMDPAR0(18)),
 311         dump_register(DEPCMDPAR0(19)),
 312         dump_register(DEPCMDPAR0(20)),
 313         dump_register(DEPCMDPAR0(21)),
 314         dump_register(DEPCMDPAR0(22)),
 315         dump_register(DEPCMDPAR0(23)),
 316         dump_register(DEPCMDPAR0(24)),
 317         dump_register(DEPCMDPAR0(25)),
 318         dump_register(DEPCMDPAR0(26)),
 319         dump_register(DEPCMDPAR0(27)),
 320         dump_register(DEPCMDPAR0(28)),
 321         dump_register(DEPCMDPAR0(29)),
 322         dump_register(DEPCMDPAR0(30)),
 323         dump_register(DEPCMDPAR0(31)),
 324
 325         dump_register(DEPCMD(0)),
 326         dump_register(DEPCMD(1)),
 327         dump_register(DEPCMD(2)),
 328         dump_register(DEPCMD(3)),
 329         dump_register(DEPCMD(4)),
 330         dump_register(DEPCMD(5)),
 331         dump_register(DEPCMD(6)),
 332         dump_register(DEPCMD(7)),
 333         dump_register(DEPCMD(8)),
 334         dump_register(DEPCMD(9)),
 335         dump_register(DEPCMD(10)),
 336         dump_register(DEPCMD(11)),
 337         dump_register(DEPCMD(12)),
 338         dump_register(DEPCMD(13)),
 339         dump_register(DEPCMD(14)),
 340         dump_register(DEPCMD(15)),
 341         dump_register(DEPCMD(16)),
 342         dump_register(DEPCMD(17)),
 343         dump_register(DEPCMD(18)),
 344         dump_register(DEPCMD(19)),
 345         dump_register(DEPCMD(20)),
 346         dump_register(DEPCMD(21)),
 347         dump_register(DEPCMD(22)),
 348         dump_register(DEPCMD(23)),
 349         dump_register(DEPCMD(24)),
 350         dump_register(DEPCMD(25)),
 351         dump_register(DEPCMD(26)),
 352         dump_register(DEPCMD(27)),
 353         dump_register(DEPCMD(28)),
 354         dump_register(DEPCMD(29)),
 355         dump_register(DEPCMD(30)),
 356         dump_register(DEPCMD(31)),
 357
 358         dump_register(OCFG),
 359         dump_register(OCTL),
 360         dump_register(OEVT),
 361         dump_register(OEVTEN),
 362         dump_register(OSTS),
 363 };
 364
 365 static int dwc3_mode_show(struct seq_file *s, void *unused)
 366 {
 367         struct dwc3             *dwc = s->private;
 368         unsigned long           flags;
 369         u32                     reg;
 370
 371         if (atomic_read(&dwc->in_lpm)) {
 372                 seq_puts(s, "USB device is powered off\n");
 373                 return 0;
 374         }
 375
 376         spin_lock_irqsave(&dwc->lock, flags);
 377         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 378         spin_unlock_irqrestore(&dwc->lock, flags);
 379
 380         switch (DWC3_GCTL_PRTCAP(reg)) {
 381         case DWC3_GCTL_PRTCAP_HOST:
 382                 seq_printf(s, "host\n");
 383                 break;
 384         case DWC3_GCTL_PRTCAP_DEVICE:
 385                 seq_printf(s, "device\n");
 386                 break;
 387         case DWC3_GCTL_PRTCAP_OTG:
 388                 seq_printf(s, "OTG\n");
 389                 break;
 390         default:
 391                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 392         }
 393
 394         return 0;
 395 }
 396
 397 static int dwc3_mode_open(struct inode *inode, struct file *file)
 398 {
 399         return single_open(file, dwc3_mode_show, inode->i_private);
 400 }
 401
 402 static ssize_t dwc3_mode_write(struct file *file,
 403                 const char __user *ubuf, size_t count, loff_t *ppos)
 404 {
 405         struct seq_file         *s = file->private_data;
 406         struct dwc3             *dwc = s->private;
 407         unsigned long           flags;
 408         u32                     mode = 0;
 409         char buf[32] = {};
 410
 411         if (atomic_read(&dwc->in_lpm)) {
 412                 dev_err(dwc->dev, "USB device is powered off\n");
 413                 return count;
 414         }
 415
 416         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 417                 return -EFAULT;
 418
 419         if (!strncmp(buf, "host", 4))
 420                 mode |= DWC3_GCTL_PRTCAP_HOST;
 421
 422         if (!strncmp(buf, "device", 6))
 423                 mode |= DWC3_GCTL_PRTCAP_DEVICE;
 424
 425         if (!strncmp(buf, "otg", 3))
 426                 mode |= DWC3_GCTL_PRTCAP_OTG;
 427
 428         if (mode) {
 429                 spin_lock_irqsave(&dwc->lock, flags);
 430                 dwc3_set_mode(dwc, mode);
 431                 spin_unlock_irqrestore(&dwc->lock, flags);
 432         }
 433         return count;
 434 }
 435
 436 static const struct file_operations dwc3_mode_fops = {
 437         .open                   = dwc3_mode_open,
 438         .write                  = dwc3_mode_write,
 439         .read                   = seq_read,
 440         .llseek                 = seq_lseek,
 441         .release                = single_release,
 442 };
 443
 444 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 445 {
 446         struct dwc3             *dwc = s->private;
 447         unsigned long           flags;
 448         u32                     reg;
 449
 450
 451         if (atomic_read(&dwc->in_lpm)) {
 452                 seq_puts(s, "USB device is powered off\n");
 453                 return 0;
 454         }
 455
 456         spin_lock_irqsave(&dwc->lock, flags);
 457         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 458         reg &= DWC3_DCTL_TSTCTRL_MASK;
 459         reg >>= 1;
 460         spin_unlock_irqrestore(&dwc->lock, flags);
 461
 462         switch (reg) {
 463         case 0:
 464                 seq_printf(s, "no test\n");
 465                 break;
 466         case TEST_J:
 467                 seq_printf(s, "test_j\n");
 468                 break;
 469         case TEST_K:
 470                 seq_printf(s, "test_k\n");
 471                 break;
 472         case TEST_SE0_NAK:
 473                 seq_printf(s, "test_se0_nak\n");
 474                 break;
 475         case TEST_PACKET:
 476                 seq_printf(s, "test_packet\n");
 477                 break;
 478         case TEST_FORCE_EN:
 479                 seq_printf(s, "test_force_enable\n");
 480                 break;
 481         default:
 482                 seq_printf(s, "UNKNOWN %d\n", reg);
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 489 {
 490         return single_open(file, dwc3_testmode_show, inode->i_private);
 491 }
 492
 493 static ssize_t dwc3_testmode_write(struct file *file,
 494                 const char __user *ubuf, size_t count, loff_t *ppos)
 495 {
 496         struct seq_file         *s = file->private_data;
 497         struct dwc3             *dwc = s->private;
 498         unsigned long           flags;
 499         u32                     testmode = 0;
 500         char                    buf[32] = {};
 501
 502         if (atomic_read(&dwc->in_lpm)) {
 503                 seq_puts(s, "USB device is powered off\n");
 504                 return count;
 505         }
 506
 507         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 508                 return -EFAULT;
 509
 510         if (!strncmp(buf, "test_j", 6))
 511                 testmode = TEST_J;
 512         else if (!strncmp(buf, "test_k", 6))
 513                 testmode = TEST_K;
 514         else if (!strncmp(buf, "test_se0_nak", 12))
 515                 testmode = TEST_SE0_NAK;
 516         else if (!strncmp(buf, "test_packet", 11))
 517                 testmode = TEST_PACKET;
 518         else if (!strncmp(buf, "test_force_enable", 17))
 519                 testmode = TEST_FORCE_EN;
 520         else
 521                 testmode = 0;
 522
 523         spin_lock_irqsave(&dwc->lock, flags);
 524         dwc3_gadget_set_test_mode(dwc, testmode);
 525         spin_unlock_irqrestore(&dwc->lock, flags);
 526
 527         return count;
 528 }
 529
 530 static const struct file_operations dwc3_testmode_fops = {
 531         .open                   = dwc3_testmode_open,
 532         .write                  = dwc3_testmode_write,
 533         .read                   = seq_read,
 534         .llseek                 = seq_lseek,
 535         .release                = single_release,
 536 };
 537
 538 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 539 {
 540         struct dwc3             *dwc = s->private;
 541         unsigned long           flags;
 542         enum dwc3_link_state    state;
 543         u32                     reg;
 544
 545         if (atomic_read(&dwc->in_lpm)) {
 546                 seq_puts(s, "USB device is powered off\n");
 547                 return 0;
 548         }
 549
 550         spin_lock_irqsave(&dwc->lock, flags);
 551         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 552         state = DWC3_DSTS_USBLNKST(reg);
 553         spin_unlock_irqrestore(&dwc->lock, flags);
 554
 555         switch (state) {
 556         case DWC3_LINK_STATE_U0:
 557                 seq_printf(s, "U0\n");
 558                 break;
 559         case DWC3_LINK_STATE_U1:
 560                 seq_printf(s, "U1\n");
 561                 break;
 562         case DWC3_LINK_STATE_U2:
 563                 seq_printf(s, "U2\n");
 564                 break;
 565         case DWC3_LINK_STATE_U3:
 566                 seq_printf(s, "U3\n");
 567                 break;
 568         case DWC3_LINK_STATE_SS_DIS:
 569                 seq_printf(s, "SS.Disabled\n");
 570                 break;
 571         case DWC3_LINK_STATE_RX_DET:
 572                 seq_printf(s, "Rx.Detect\n");
 573                 break;
 574         case DWC3_LINK_STATE_SS_INACT:
 575                 seq_printf(s, "SS.Inactive\n");
 576                 break;
 577         case DWC3_LINK_STATE_POLL:
 578                 seq_printf(s, "Poll\n");
 579                 break;
 580         case DWC3_LINK_STATE_RECOV:
 581                 seq_printf(s, "Recovery\n");
 582                 break;
 583         case DWC3_LINK_STATE_HRESET:
 584                 seq_printf(s, "HRESET\n");
 585                 break;
 586         case DWC3_LINK_STATE_CMPLY:
 587                 seq_printf(s, "Compliance\n");
 588                 break;
 589         case DWC3_LINK_STATE_LPBK:
 590                 seq_printf(s, "Loopback\n");
 591                 break;
 592         case DWC3_LINK_STATE_RESET:
 593                 seq_printf(s, "Reset\n");
 594                 break;
 595         case DWC3_LINK_STATE_RESUME:
 596                 seq_printf(s, "Resume\n");
 597                 break;
 598         default:
 599                 seq_printf(s, "UNKNOWN %d\n", state);
 600         }
 601
 602         return 0;
 603 }
 604
 605 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 606 {
 607         return single_open(file, dwc3_link_state_show, inode->i_private);
 608 }
 609
 610 static ssize_t dwc3_link_state_write(struct file *file,
 611                 const char __user *ubuf, size_t count, loff_t *ppos)
 612 {
 613         struct seq_file         *s = file->private_data;
 614         struct dwc3             *dwc = s->private;
 615         unsigned long           flags;
 616         enum dwc3_link_state    state = 0;
 617         char                    buf[32] = {};
 618
 619         if (atomic_read(&dwc->in_lpm)) {
 620                 seq_puts(s, "USB device is powered off\n");
 621                 return count;
 622         }
 623
 624         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 625                 return -EFAULT;
 626
 627         if (!strncmp(buf, "SS.Disabled", 11))
 628                 state = DWC3_LINK_STATE_SS_DIS;
 629         else if (!strncmp(buf, "Rx.Detect", 9))
 630                 state = DWC3_LINK_STATE_RX_DET;
 631         else if (!strncmp(buf, "SS.Inactive", 11))
 632                 state = DWC3_LINK_STATE_SS_INACT;
 633         else if (!strncmp(buf, "Recovery", 8))
 634                 state = DWC3_LINK_STATE_RECOV;
 635         else if (!strncmp(buf, "Compliance", 10))
 636                 state = DWC3_LINK_STATE_CMPLY;
 637         else if (!strncmp(buf, "Loopback", 8))
 638                 state = DWC3_LINK_STATE_LPBK;
 639         else
 640                 return -EINVAL;
 641
 642         spin_lock_irqsave(&dwc->lock, flags);
 643         dwc3_gadget_set_link_state(dwc, state);
 644         spin_unlock_irqrestore(&dwc->lock, flags);
 645
 646         return count;
 647 }
 648
 649 static const struct file_operations dwc3_link_state_fops = {
 650         .open                   = dwc3_link_state_open,
 651         .write                  = dwc3_link_state_write,
 652         .read                   = seq_read,
 653         .llseek                 = seq_lseek,
 654         .release                = single_release,
 655 };
 656
 657 static int ep_num;
 658 static ssize_t dwc3_store_ep_num(struct file *file, const char __user *ubuf,
 659                                  size_t count, loff_t *ppos)
 660 {
 661         struct seq_file         *s = file->private_data;
 662         struct dwc3             *dwc = s->private;
 663         char                    kbuf[10] = {};
 664         unsigned int            num, dir, temp;
 665         unsigned long           flags;
 666
 667         if (copy_from_user(kbuf, ubuf, min_t(size_t, sizeof(kbuf) - 1, count)))
 668                 return -EFAULT;
 669
 670         if (sscanf(kbuf, "%u %u", &num, &dir) != 2)
 671                 return -EINVAL;
 672
 673         if (dir != 0 && dir != 1)
 674                 return -EINVAL;
 675
 676         temp = (num << 1) + dir;
 677         if (temp >= (dwc->num_in_eps + dwc->num_out_eps) ||
 678                                         temp >= DWC3_ENDPOINTS_NUM)
 679                 return -EINVAL;
 680
 681         spin_lock_irqsave(&dwc->lock, flags);
 682         ep_num = temp;
 683         spin_unlock_irqrestore(&dwc->lock, flags);
 684
 685         return count;
 686 }
 687
 688 static int dwc3_ep_req_list_show(struct seq_file *s, void *unused)
 689 {
 690         struct dwc3             *dwc = s->private;
 691         struct dwc3_ep          *dep;
 692         struct dwc3_request     *req = NULL;
 693         struct list_head        *ptr = NULL;
 694         unsigned long           flags;
 695
 696         spin_lock_irqsave(&dwc->lock, flags);
 697         dep = dwc->eps[ep_num];
 698
 699         seq_printf(s, "%s request list: flags: 0x%x\n", dep->name, dep->flags);
 700         list_for_each(ptr, &dep->request_list) {
 701                 req = list_entry(ptr, struct dwc3_request, list);
 702
 703                 seq_printf(s,
 704                         "req:0x%pK len: %d sts: %d dma:0x%pa num_sgs: %d\n",
 705                         req, req->request.length, req->request.status,
 706                         &req->request.dma, req->request.num_sgs);
 707         }
 708         spin_unlock_irqrestore(&dwc->lock, flags);
 709
 710         return 0;
 711 }
 712
 713 static int dwc3_ep_req_list_open(struct inode *inode, struct file *file)
 714 {
 715         return single_open(file, dwc3_ep_req_list_show, inode->i_private);
 716 }
 717
 718 static const struct file_operations dwc3_ep_req_list_fops = {
 719         .open                   = dwc3_ep_req_list_open,
 720         .write                  = dwc3_store_ep_num,
 721         .read                   = seq_read,
 722         .llseek                 = seq_lseek,
 723         .release                = single_release,
 724 };
 725
 726 static int dwc3_ep_queued_req_show(struct seq_file *s, void *unused)
 727 {
 728         struct dwc3             *dwc = s->private;
 729         struct dwc3_ep          *dep;
 730         struct dwc3_request     *req = NULL;
 731         struct list_head        *ptr = NULL;
 732         unsigned long           flags;
 733
 734         spin_lock_irqsave(&dwc->lock, flags);
 735         dep = dwc->eps[ep_num];
 736
 737         seq_printf(s, "%s queued reqs to HW: flags:0x%x\n", dep->name,
 738                                                                 dep->flags);
 739         list_for_each(ptr, &dep->req_queued) {
 740                 req = list_entry(ptr, struct dwc3_request, list);
 741
 742                 seq_printf(s,
 743                         "req:0x%pK len:%d sts:%d dma:%pa nsg:%d trb:0x%pK\n",
 744                         req, req->request.length, req->request.status,
 745                         &req->request.dma, req->request.num_sgs, req->trb);
 746         }
 747         spin_unlock_irqrestore(&dwc->lock, flags);
 748
 749         return 0;
 750 }
 751
 752 static int dwc3_ep_queued_req_open(struct inode *inode, struct file *file)
 753 {
 754         return single_open(file, dwc3_ep_queued_req_show, inode->i_private);
 755 }
 756
 757 const struct file_operations dwc3_ep_req_queued_fops = {
 758         .open                   = dwc3_ep_queued_req_open,
 759         .write                  = dwc3_store_ep_num,
 760         .read                   = seq_read,
 761         .llseek                 = seq_lseek,
 762         .release                = single_release,
 763 };
 764
 765 static int dwc3_ep_trbs_show(struct seq_file *s, void *unused)
 766 {
 767         struct dwc3             *dwc = s->private;
 768         struct dwc3_ep          *dep;
 769         struct dwc3_trb         *trb;
 770         unsigned long           flags;
 771         int                     j;
 772
 773         if (!ep_num)
 774                 return 0;
 775
 776         spin_lock_irqsave(&dwc->lock, flags);
 777         dep = dwc->eps[ep_num];
 778
 779         seq_printf(s, "%s trb pool: flags:0x%x freeslot:%d busyslot:%d\n",
 780                 dep->name, dep->flags, dep->free_slot, dep->busy_slot);
 781         for (j = 0; j < DWC3_TRB_NUM; j++) {
 782                 trb = &dep->trb_pool[j];
 783                 seq_printf(s, "trb:0x%pK bph:0x%x bpl:0x%x size:0x%x ctrl: %x\n",
 784                         trb, trb->bph, trb->bpl, trb->size, trb->ctrl);
 785         }
 786         spin_unlock_irqrestore(&dwc->lock, flags);
 787
 788         return 0;
 789 }
 790
 791 static int dwc3_ep_trbs_list_open(struct inode *inode, struct file *file)
 792 {
 793         return single_open(file, dwc3_ep_trbs_show, inode->i_private);
 794 }
 795
 796 const struct file_operations dwc3_ep_trb_list_fops = {
 797         .open                   = dwc3_ep_trbs_list_open,
 798         .write                  = dwc3_store_ep_num,
 799         .read                   = seq_read,
 800         .llseek                 = seq_lseek,
 801         .release                = single_release,
 802 };
 803
 804 static unsigned int ep_addr_rxdbg_mask = 1;
 805 module_param(ep_addr_rxdbg_mask, uint, S_IRUGO | S_IWUSR);
 806 static unsigned int ep_addr_txdbg_mask = 1;
 807 module_param(ep_addr_txdbg_mask, uint, S_IRUGO | S_IWUSR);
 808
 809 /* Maximum debug message length */
 810 #define DBG_DATA_MSG   64UL
 811
 812 /* Maximum number of messages */
 813 #define DBG_DATA_MAX   2048UL
 814
 815 static struct {
 816         char     (buf[DBG_DATA_MAX])[DBG_DATA_MSG];   /* buffer */
 817         unsigned idx;   /* index */
 818         unsigned tty;   /* print to console? */
 819         rwlock_t lck;   /* lock */
 820 } dbg_dwc3_data = {
 821         .idx = 0,
 822         .tty = 0,
 823         .lck = __RW_LOCK_UNLOCKED(lck)
 824 };
 825
 826 /**
 827  * dbg_dec: decrements debug event index
 828  * @idx: buffer index
 829  */
 830 static inline void __maybe_unused dbg_dec(unsigned *idx)
 831 {
 832         *idx = (*idx - 1) % DBG_DATA_MAX;
 833 }
 834
 835 /**
 836  * dbg_inc: increments debug event index
 837  * @idx: buffer index
 838  */
 839 static inline void dbg_inc(unsigned *idx)
 840 {
 841         *idx = (*idx + 1) % DBG_DATA_MAX;
 842 }
 843
 844 #define TIME_BUF_LEN  20
 845 /*get_timestamp - returns time of day in us */
 846 static char *get_timestamp(char *tbuf)
 847 {
 848         unsigned long long t;
 849         unsigned long nanosec_rem;
 850
 851         t = cpu_clock(smp_processor_id());
 852         nanosec_rem = do_div(t, 1000000000)/1000;
 853         scnprintf(tbuf, TIME_BUF_LEN, "[%5lu.%06lu] ", (unsigned long)t,
 854                 nanosec_rem);
 855         return tbuf;
 856 }
 857
 858 static int allow_dbg_print(u8 ep_num)
 859 {
 860         int dir, num;
 861
 862         /* allow bus wide events */
 863         if (ep_num == 0xff)
 864                 return 1;
 865
 866         dir = ep_num & 0x1;
 867         num = ep_num >> 1;
 868         num = 1 << num;
 869
 870         if (dir && (num & ep_addr_txdbg_mask))
 871                 return 1;
 872         if (!dir && (num & ep_addr_rxdbg_mask))
 873                 return 1;
 874
 875         return 0;
 876 }
 877
 878 /**
 879  * dbg_print:  prints the common part of the event
 880  * @addr:   endpoint address
 881  * @name:   event name
 882  * @status: status
 883  * @extra:  extra information
 884  */
 885 void dbg_print(u8 ep_num, const char *name, int status, const char *extra)
 886 {
 887         unsigned long flags;
 888         char tbuf[TIME_BUF_LEN];
 889
 890         if (!allow_dbg_print(ep_num))
 891                 return;
 892
 893         write_lock_irqsave(&dbg_dwc3_data.lck, flags);
 894
 895         scnprintf(dbg_dwc3_data.buf[dbg_dwc3_data.idx], DBG_DATA_MSG,
 896                   "%s\t? %02X %-12.12s %4i ?\t%s\n",
 897                   get_timestamp(tbuf), ep_num, name, status, extra);
 898
 899         dbg_inc(&dbg_dwc3_data.idx);
 900
 901         write_unlock_irqrestore(&dbg_dwc3_data.lck, flags);
 902
 903         if (dbg_dwc3_data.tty != 0)
 904                 pr_notice("%s\t? %02X %-7.7s %4i ?\t%s\n",
 905                           get_timestamp(tbuf), ep_num, name, status, extra);
 906 }
 907
 908 /**
 909  * dbg_done: prints a DONE event
 910  * @addr:   endpoint address
 911  * @td:     transfer descriptor
 912  * @status: status
 913  */
 914 void dbg_done(u8 ep_num, const u32 count, int status)
 915 {
 916         char msg[DBG_DATA_MSG];
 917
 918         if (!allow_dbg_print(ep_num))
 919                 return;
 920
 921         scnprintf(msg, sizeof(msg), "%d", count);
 922         dbg_print(ep_num, "DONE", status, msg);
 923 }
 924
 925 /**
 926  * dbg_event: prints a generic event
 927  * @addr:   endpoint address
 928  * @name:   event name
 929  * @status: status
 930  */
 931 void dbg_event(u8 ep_num, const char *name, int status)
 932 {
 933         if (!allow_dbg_print(ep_num))
 934                 return;
 935
 936         if (name != NULL)
 937                 dbg_print(ep_num, name, status, "");
 938 }
 939
 940 /*
 941  * dbg_queue: prints a QUEUE event
 942  * @addr:   endpoint address
 943  * @req:    USB request
 944  * @status: status
 945  */
 946 void dbg_queue(u8 ep_num, const struct usb_request *req, int status)
 947 {
 948         char msg[DBG_DATA_MSG];
 949
 950         if (!allow_dbg_print(ep_num))
 951                 return;
 952
 953         if (req != NULL) {
 954                 scnprintf(msg, sizeof(msg),
 955                           "%d %d", !req->no_interrupt, req->length);
 956                 dbg_print(ep_num, "QUEUE", status, msg);
 957         }
 958 }
 959
 960 /**
 961  * dbg_setup: prints a SETUP event
 962  * @addr: endpoint address
 963  * @req:  setup request
 964  */
 965 void dbg_setup(u8 ep_num, const struct usb_ctrlrequest *req)
 966 {
 967         char msg[DBG_DATA_MSG];
 968
 969         if (!allow_dbg_print(ep_num))
 970                 return;
 971
 972         if (req != NULL) {
 973                 scnprintf(msg, sizeof(msg),
 974                           "%02X %02X %04X %04X %d", req->bRequestType,
 975                           req->bRequest, le16_to_cpu(req->wValue),
 976                           le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
 977                 dbg_print(ep_num, "SETUP", 0, msg);
 978         }
 979 }
 980
 981 /**
 982  * dbg_print_reg: prints a reg value
 983  * @name:   reg name
 984  * @reg: reg value to be printed
 985  */
 986 void dbg_print_reg(const char *name, int reg)
 987 {
 988         unsigned long flags;
 989
 990         write_lock_irqsave(&dbg_dwc3_data.lck, flags);
 991
 992         scnprintf(dbg_dwc3_data.buf[dbg_dwc3_data.idx], DBG_DATA_MSG,
 993                   "%s = 0x%08x\n", name, reg);
 994
 995         dbg_inc(&dbg_dwc3_data.idx);
 996
 997         write_unlock_irqrestore(&dbg_dwc3_data.lck, flags);
 998
 999         if (dbg_dwc3_data.tty != 0)
1000                 pr_notice("%s = 0x%08x\n", name, reg);
1001 }
1002
1003 /**
1004  * store_events: configure if events are going to be also printed to console
1005  *
1006  */
1007 static ssize_t dwc3_store_events(struct file *file,
1008                             const char __user *buf, size_t count, loff_t *ppos)
1009 {
1010         int ret;
1011         u8 tty;
1012
1013         if (buf == NULL) {
1014                 pr_err("[%s] EINVAL\n", __func__);
1015                 ret = -EINVAL;
1016                 return ret;
1017         }
1018
1019         ret = kstrtou8_from_user(buf, count, 0, &tty);
1020         if (ret < 0) {
1021                 pr_err("can't get enter value.\n");
1022                 return ret;
1023         }
1024
1025         if (tty > 1) {
1026                 pr_err("<1|0>: enable|disable console log\n");
1027                 ret = -EINVAL;
1028                 return ret;
1029         }
1030
1031         dbg_dwc3_data.tty = tty;
1032         pr_info("tty = %u", dbg_dwc3_data.tty);
1033
1034         return count;
1035 }
1036
1037 static int dwc3_gadget_data_events_show(struct seq_file *s, void *unused)
1038 {
1039         unsigned long   flags;
1040         unsigned        i;
1041
1042         read_lock_irqsave(&dbg_dwc3_data.lck, flags);
1043
1044         i = dbg_dwc3_data.idx;
1045         if (strnlen(dbg_dwc3_data.buf[i], DBG_DATA_MSG))
1046                 seq_printf(s, "%s\n", dbg_dwc3_data.buf[i]);
1047         for (dbg_inc(&i); i != dbg_dwc3_data.idx; dbg_inc(&i)) {
1048                 if (!strnlen(dbg_dwc3_data.buf[i], DBG_DATA_MSG))
1049                         continue;
1050                 seq_printf(s, "%s\n", dbg_dwc3_data.buf[i]);
1051         }
1052
1053         read_unlock_irqrestore(&dbg_dwc3_data.lck, flags);
1054
1055         return 0;
1056 }
1057
1058 static int dwc3_gadget_data_events_open(struct inode *inode, struct file *f)
1059 {
1060         return single_open(f, dwc3_gadget_data_events_show, inode->i_private);
1061 }
1062
1063 const struct file_operations dwc3_gadget_dbg_data_fops = {
1064         .open                   = dwc3_gadget_data_events_open,
1065         .read                   = seq_read,
1066         .write                  = dwc3_store_events,
1067         .llseek                 = seq_lseek,
1068         .release                = single_release,
1069 };
1070
1071 static ssize_t dwc3_store_int_events(struct file *file,
1072                         const char __user *ubuf, size_t count, loff_t *ppos)
1073 {
1074         int i, ret;
1075         unsigned long flags;
1076         struct seq_file *s = file->private_data;
1077         struct dwc3 *dwc = s->private;
1078         struct dwc3_ep *dep;
1079         struct timespec ts;
1080         u8 clear_stats;
1081
1082         if (ubuf == NULL) {
1083                 pr_err("[%s] EINVAL\n", __func__);
1084                 ret = -EINVAL;
1085                 return ret;
1086         }
1087
1088         ret = kstrtou8_from_user(ubuf, count, 0, &clear_stats);
1089         if (ret < 0) {
1090                 pr_err("can't get enter value.\n");
1091                 return ret;
1092         }
1093
1094         if (clear_stats != 0) {
1095                 pr_err("Wrong value. To clear stats, enter value as 0.\n");
1096                 ret = -EINVAL;
1097                 return ret;
1098         }
1099
1100         spin_lock_irqsave(&dwc->lock, flags);
1101
1102         pr_debug("%s(): clearing debug interrupt buffers\n", __func__);
1103         ts = current_kernel_time();
1104         for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) {
1105                 dep = dwc->eps[i];
1106                 memset(&dep->dbg_ep_events, 0, sizeof(dep->dbg_ep_events));
1107                 memset(&dep->dbg_ep_events_diff, 0, sizeof(dep->dbg_ep_events));
1108                 dep->dbg_ep_events_ts = ts;
1109         }
1110         memset(&dwc->dbg_gadget_events, 0, sizeof(dwc->dbg_gadget_events));
1111
1112         spin_unlock_irqrestore(&dwc->lock, flags);
1113
1114         return count;
1115 }
1116
1117 static int dwc3_gadget_int_events_show(struct seq_file *s, void *unused)
1118 {
1119         unsigned long   flags;
1120         struct dwc3 *dwc = s->private;
1121         struct dwc3_gadget_events *dbg_gadget_events;
1122         struct dwc3_ep *dep;
1123         int i;
1124         struct timespec ts_delta;
1125         struct timespec ts_current;
1126         u32 ts_delta_ms;
1127
1128         spin_lock_irqsave(&dwc->lock, flags);
1129         dbg_gadget_events = &dwc->dbg_gadget_events;
1130
1131         for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) {
1132                 dep = dwc->eps[i];
1133
1134                 if (dep == NULL || !(dep->flags & DWC3_EP_ENABLED))
1135                         continue;
1136
1137                 ts_current = current_kernel_time();
1138                 ts_delta = timespec_sub(ts_current, dep->dbg_ep_events_ts);
1139                 ts_delta_ms = ts_delta.tv_nsec / NSEC_PER_MSEC +
1140                         ts_delta.tv_sec * MSEC_PER_SEC;
1141
1142                 seq_printf(s, "\n\n===== dbg_ep_events for EP(%d) %s =====\n",
1143                         i, dep->name);
1144                 seq_printf(s, "xfercomplete:%u @ %luHz\n",
1145                         dep->dbg_ep_events.xfercomplete,
1146                         ep_event_rate(xfercomplete, dep->dbg_ep_events,
1147                                 dep->dbg_ep_events_diff, ts_delta_ms));
1148                 seq_printf(s, "xfernotready:%u @ %luHz\n",
1149                         dep->dbg_ep_events.xfernotready,
1150                         ep_event_rate(xfernotready, dep->dbg_ep_events,
1151                                 dep->dbg_ep_events_diff, ts_delta_ms));
1152                 seq_printf(s, "control_data:%u @ %luHz\n",
1153                         dep->dbg_ep_events.control_data,
1154                         ep_event_rate(control_data, dep->dbg_ep_events,
1155                                 dep->dbg_ep_events_diff, ts_delta_ms));
1156                 seq_printf(s, "control_status:%u @ %luHz\n",
1157                         dep->dbg_ep_events.control_status,
1158                         ep_event_rate(control_status, dep->dbg_ep_events,
1159                                 dep->dbg_ep_events_diff, ts_delta_ms));
1160                 seq_printf(s, "xferinprogress:%u @ %luHz\n",
1161                         dep->dbg_ep_events.xferinprogress,
1162                         ep_event_rate(xferinprogress, dep->dbg_ep_events,
1163                                 dep->dbg_ep_events_diff, ts_delta_ms));
1164                 seq_printf(s, "rxtxfifoevent:%u @ %luHz\n",
1165                         dep->dbg_ep_events.rxtxfifoevent,
1166                         ep_event_rate(rxtxfifoevent, dep->dbg_ep_events,
1167                                 dep->dbg_ep_events_diff, ts_delta_ms));
1168                 seq_printf(s, "streamevent:%u @ %luHz\n",
1169                         dep->dbg_ep_events.streamevent,
1170                         ep_event_rate(streamevent, dep->dbg_ep_events,
1171                                 dep->dbg_ep_events_diff, ts_delta_ms));
1172                 seq_printf(s, "epcmdcomplt:%u @ %luHz\n",
1173                         dep->dbg_ep_events.epcmdcomplete,
1174                         ep_event_rate(epcmdcomplete, dep->dbg_ep_events,
1175                                 dep->dbg_ep_events_diff, ts_delta_ms));
1176                 seq_printf(s, "cmdcmplt:%u @ %luHz\n",
1177                         dep->dbg_ep_events.cmdcmplt,
1178                         ep_event_rate(cmdcmplt, dep->dbg_ep_events,
1179                                 dep->dbg_ep_events_diff, ts_delta_ms));
1180                 seq_printf(s, "unknown:%u @ %luHz\n",
1181                         dep->dbg_ep_events.unknown_event,
1182                         ep_event_rate(unknown_event, dep->dbg_ep_events,
1183                                 dep->dbg_ep_events_diff, ts_delta_ms));
1184                 seq_printf(s, "total:%u @ %luHz\n",
1185                         dep->dbg_ep_events.total,
1186                         ep_event_rate(total, dep->dbg_ep_events,
1187                                 dep->dbg_ep_events_diff, ts_delta_ms));
1188
1189                 dep->dbg_ep_events_ts = ts_current;
1190                 dep->dbg_ep_events_diff = dep->dbg_ep_events;
1191         }
1192
1193         seq_puts(s, "\n=== dbg_gadget events ==\n");
1194         seq_printf(s, "disconnect:%u\n reset:%u\n",
1195                 dbg_gadget_events->disconnect, dbg_gadget_events->reset);
1196         seq_printf(s, "connect:%u\n wakeup:%u\n",
1197                 dbg_gadget_events->connect, dbg_gadget_events->wakeup);
1198         seq_printf(s, "link_status_change:%u\n eopf:%u\n",
1199                 dbg_gadget_events->link_status_change, dbg_gadget_events->eopf);
1200         seq_printf(s, "sof:%u\n suspend:%u\n",
1201                 dbg_gadget_events->sof, dbg_gadget_events->suspend);
1202         seq_printf(s, "erratic_error:%u\n overflow:%u\n",
1203                 dbg_gadget_events->erratic_error,
1204                 dbg_gadget_events->overflow);
1205         seq_printf(s, "vendor_dev_test_lmp:%u\n cmdcmplt:%u\n",
1206                 dbg_gadget_events->vendor_dev_test_lmp,
1207                 dbg_gadget_events->cmdcmplt);
1208         seq_printf(s, "unknown_event:%u\n", dbg_gadget_events->unknown_event);
1209
1210         seq_printf(s, "\n\t== Last %d interrupts stats ==\t\n", MAX_INTR_STATS);
1211         seq_puts(s, "@ time (us):\t");
1212         for (i = 0; i < MAX_INTR_STATS; i++)
1213                 seq_printf(s, "%lld\t", ktime_to_us(dwc->irq_start_time[i]));
1214         seq_puts(s, "\nhard irq time (us):\t");
1215         for (i = 0; i < MAX_INTR_STATS; i++)
1216                 seq_printf(s, "%d\t", dwc->irq_completion_time[i]);
1217         seq_puts(s, "\nevents count:\t\t");
1218         for (i = 0; i < MAX_INTR_STATS; i++)
1219                 seq_printf(s, "%d\t", dwc->irq_event_count[i]);
1220         seq_puts(s, "\nbh handled count:\t");
1221         for (i = 0; i < MAX_INTR_STATS; i++)
1222                 seq_printf(s, "%d\t", dwc->bh_handled_evt_cnt[i]);
1223         seq_puts(s, "\nirq thread time (us):\t");
1224         for (i = 0; i < MAX_INTR_STATS; i++)
1225                 seq_printf(s, "%d\t", dwc->bh_completion_time[i]);
1226         seq_putc(s, '\n');
1227
1228         seq_printf(s, "t_pwr evt irq : %lld\n",
1229                         ktime_to_us(dwc->t_pwr_evt_irq));
1230
1231         seq_printf(s, "l1_remote_wakeup_cnt : %lu\n",
1232                 dwc->l1_remote_wakeup_cnt);
1233
1234         spin_unlock_irqrestore(&dwc->lock, flags);
1235         return 0;
1236 }
1237
1238 static int dwc3_gadget_events_open(struct inode *inode, struct file *f)
1239 {
1240         return single_open(f, dwc3_gadget_int_events_show, inode->i_private);
1241 }
1242
1243 const struct file_operations dwc3_gadget_dbg_events_fops = {
1244         .open           = dwc3_gadget_events_open,
1245         .read           = seq_read,
1246         .write          = dwc3_store_int_events,
1247         .llseek         = seq_lseek,
1248         .release        = single_release,
1249 };
1250
1251 int dwc3_debugfs_init(struct dwc3 *dwc)
1252 {
1253         struct dentry           *root;
1254         struct dentry           *file;
1255         int                     ret;
1256
1257         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
1258         if (!root) {
1259                 ret = -ENOMEM;
1260                 goto err0;
1261         }
1262
1263         dwc->root = root;
1264
1265         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
1266         if (!dwc->regset) {
1267                 ret = -ENOMEM;
1268                 goto err1;
1269         }
1270
1271         dwc->regset->regs = dwc3_regs;
1272         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
1273         dwc->regset->base = dwc->regs;
1274
1275         if (dwc->create_reg_debugfs) {
1276                 file = debugfs_create_regset32("regdump", 0444,
1277                                                 root, dwc->regset);
1278                 if (!file) {
1279                         dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
1280                         ret = -ENOMEM;
1281                         goto err1;
1282                 }
1283         }
1284
1285         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
1286                 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
1287                                 dwc, &dwc3_mode_fops);
1288                 if (!file) {
1289                         ret = -ENOMEM;
1290                         goto err1;
1291                 }
1292         }
1293
1294         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
1295                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
1296                 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
1297                                 dwc, &dwc3_testmode_fops);
1298                 if (!file) {
1299                         ret = -ENOMEM;
1300                         goto err1;
1301                 }
1302
1303                 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
1304                                 dwc, &dwc3_link_state_fops);
1305                 if (!file) {
1306                         ret = -ENOMEM;
1307                         goto err1;
1308                 }
1309         }
1310
1311         file = debugfs_create_file("trbs", S_IRUGO | S_IWUSR, root,
1312                         dwc, &dwc3_ep_trb_list_fops);
1313         if (!file) {
1314                 ret = -ENOMEM;
1315                 goto err1;
1316         }
1317
1318         file = debugfs_create_file("requests", S_IRUGO | S_IWUSR, root,
1319                         dwc, &dwc3_ep_req_list_fops);
1320         if (!file) {
1321                 ret = -ENOMEM;
1322                 goto err1;
1323         }
1324
1325         file = debugfs_create_file("queued_reqs", S_IRUGO | S_IWUSR, root,
1326                         dwc, &dwc3_ep_req_queued_fops);
1327         if (!file) {
1328                 ret = -ENOMEM;
1329                 goto err1;
1330         }
1331
1332         file = debugfs_create_file("events", S_IRUGO | S_IWUSR, root,
1333                         dwc, &dwc3_gadget_dbg_data_fops);
1334         if (!file) {
1335                 ret = -ENOMEM;
1336                 goto err1;
1337         }
1338
1339         file = debugfs_create_file("int_events", S_IRUGO | S_IWUSR, root,
1340                         dwc, &dwc3_gadget_dbg_events_fops);
1341         if (!file) {
1342                 ret = -ENOMEM;
1343                 goto err1;
1344         }
1345
1346         return 0;
1347
1348 err1:
1349         debugfs_remove_recursive(root);
1350
1351 err0:
1352         return ret;
1353 }
1354
1355 void dwc3_debugfs_exit(struct dwc3 *dwc)
1356 {
1357         debugfs_remove_recursive(dwc->root);
1358         dwc->root = NULL;
1359 }