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 - DWC3_GLOBALS_REGS_START, \
  40 }
  41
  42 static const struct debugfs_reg32 dwc3_regs[] = {
  43         dump_register(GSBUSCFG0),
  44         dump_register(GSBUSCFG1),
  45         dump_register(GTXTHRCFG),
  46         dump_register(GRXTHRCFG),
  47         dump_register(GCTL),
  48         dump_register(GEVTEN),
  49         dump_register(GSTS),
  50         dump_register(GUCTL1),
  51         dump_register(GSNPSID),
  52         dump_register(GGPIO),
  53         dump_register(GUID),
  54         dump_register(GUCTL),
  55         dump_register(GBUSERRADDR0),
  56         dump_register(GBUSERRADDR1),
  57         dump_register(GPRTBIMAP0),
  58         dump_register(GPRTBIMAP1),
  59         dump_register(GHWPARAMS0),
  60         dump_register(GHWPARAMS1),
  61         dump_register(GHWPARAMS2),
  62         dump_register(GHWPARAMS3),
  63         dump_register(GHWPARAMS4),
  64         dump_register(GHWPARAMS5),
  65         dump_register(GHWPARAMS6),
  66         dump_register(GHWPARAMS7),
  67         dump_register(GDBGFIFOSPACE),
  68         dump_register(GDBGLTSSM),
  69         dump_register(GPRTBIMAP_HS0),
  70         dump_register(GPRTBIMAP_HS1),
  71         dump_register(GPRTBIMAP_FS0),
  72         dump_register(GPRTBIMAP_FS1),
  73
  74         dump_register(GUSB2PHYCFG(0)),
  75         dump_register(GUSB2PHYCFG(1)),
  76         dump_register(GUSB2PHYCFG(2)),
  77         dump_register(GUSB2PHYCFG(3)),
  78         dump_register(GUSB2PHYCFG(4)),
  79         dump_register(GUSB2PHYCFG(5)),
  80         dump_register(GUSB2PHYCFG(6)),
  81         dump_register(GUSB2PHYCFG(7)),
  82         dump_register(GUSB2PHYCFG(8)),
  83         dump_register(GUSB2PHYCFG(9)),
  84         dump_register(GUSB2PHYCFG(10)),
  85         dump_register(GUSB2PHYCFG(11)),
  86         dump_register(GUSB2PHYCFG(12)),
  87         dump_register(GUSB2PHYCFG(13)),
  88         dump_register(GUSB2PHYCFG(14)),
  89         dump_register(GUSB2PHYCFG(15)),
  90
  91         dump_register(GUSB2I2CCTL(0)),
  92         dump_register(GUSB2I2CCTL(1)),
  93         dump_register(GUSB2I2CCTL(2)),
  94         dump_register(GUSB2I2CCTL(3)),
  95         dump_register(GUSB2I2CCTL(4)),
  96         dump_register(GUSB2I2CCTL(5)),
  97         dump_register(GUSB2I2CCTL(6)),
  98         dump_register(GUSB2I2CCTL(7)),
  99         dump_register(GUSB2I2CCTL(8)),
 100         dump_register(GUSB2I2CCTL(9)),
 101         dump_register(GUSB2I2CCTL(10)),
 102         dump_register(GUSB2I2CCTL(11)),
 103         dump_register(GUSB2I2CCTL(12)),
 104         dump_register(GUSB2I2CCTL(13)),
 105         dump_register(GUSB2I2CCTL(14)),
 106         dump_register(GUSB2I2CCTL(15)),
 107
 108         dump_register(GUSB2PHYACC(0)),
 109         dump_register(GUSB2PHYACC(1)),
 110         dump_register(GUSB2PHYACC(2)),
 111         dump_register(GUSB2PHYACC(3)),
 112         dump_register(GUSB2PHYACC(4)),
 113         dump_register(GUSB2PHYACC(5)),
 114         dump_register(GUSB2PHYACC(6)),
 115         dump_register(GUSB2PHYACC(7)),
 116         dump_register(GUSB2PHYACC(8)),
 117         dump_register(GUSB2PHYACC(9)),
 118         dump_register(GUSB2PHYACC(10)),
 119         dump_register(GUSB2PHYACC(11)),
 120         dump_register(GUSB2PHYACC(12)),
 121         dump_register(GUSB2PHYACC(13)),
 122         dump_register(GUSB2PHYACC(14)),
 123         dump_register(GUSB2PHYACC(15)),
 124
 125         dump_register(GUSB3PIPECTL(0)),
 126         dump_register(GUSB3PIPECTL(1)),
 127         dump_register(GUSB3PIPECTL(2)),
 128         dump_register(GUSB3PIPECTL(3)),
 129         dump_register(GUSB3PIPECTL(4)),
 130         dump_register(GUSB3PIPECTL(5)),
 131         dump_register(GUSB3PIPECTL(6)),
 132         dump_register(GUSB3PIPECTL(7)),
 133         dump_register(GUSB3PIPECTL(8)),
 134         dump_register(GUSB3PIPECTL(9)),
 135         dump_register(GUSB3PIPECTL(10)),
 136         dump_register(GUSB3PIPECTL(11)),
 137         dump_register(GUSB3PIPECTL(12)),
 138         dump_register(GUSB3PIPECTL(13)),
 139         dump_register(GUSB3PIPECTL(14)),
 140         dump_register(GUSB3PIPECTL(15)),
 141
 142         dump_register(GTXFIFOSIZ(0)),
 143         dump_register(GTXFIFOSIZ(1)),
 144         dump_register(GTXFIFOSIZ(2)),
 145         dump_register(GTXFIFOSIZ(3)),
 146         dump_register(GTXFIFOSIZ(4)),
 147         dump_register(GTXFIFOSIZ(5)),
 148         dump_register(GTXFIFOSIZ(6)),
 149         dump_register(GTXFIFOSIZ(7)),
 150         dump_register(GTXFIFOSIZ(8)),
 151         dump_register(GTXFIFOSIZ(9)),
 152         dump_register(GTXFIFOSIZ(10)),
 153         dump_register(GTXFIFOSIZ(11)),
 154         dump_register(GTXFIFOSIZ(12)),
 155         dump_register(GTXFIFOSIZ(13)),
 156         dump_register(GTXFIFOSIZ(14)),
 157         dump_register(GTXFIFOSIZ(15)),
 158         dump_register(GTXFIFOSIZ(16)),
 159         dump_register(GTXFIFOSIZ(17)),
 160         dump_register(GTXFIFOSIZ(18)),
 161         dump_register(GTXFIFOSIZ(19)),
 162         dump_register(GTXFIFOSIZ(20)),
 163         dump_register(GTXFIFOSIZ(21)),
 164         dump_register(GTXFIFOSIZ(22)),
 165         dump_register(GTXFIFOSIZ(23)),
 166         dump_register(GTXFIFOSIZ(24)),
 167         dump_register(GTXFIFOSIZ(25)),
 168         dump_register(GTXFIFOSIZ(26)),
 169         dump_register(GTXFIFOSIZ(27)),
 170         dump_register(GTXFIFOSIZ(28)),
 171         dump_register(GTXFIFOSIZ(29)),
 172         dump_register(GTXFIFOSIZ(30)),
 173         dump_register(GTXFIFOSIZ(31)),
 174
 175         dump_register(GRXFIFOSIZ(0)),
 176         dump_register(GRXFIFOSIZ(1)),
 177         dump_register(GRXFIFOSIZ(2)),
 178         dump_register(GRXFIFOSIZ(3)),
 179         dump_register(GRXFIFOSIZ(4)),
 180         dump_register(GRXFIFOSIZ(5)),
 181         dump_register(GRXFIFOSIZ(6)),
 182         dump_register(GRXFIFOSIZ(7)),
 183         dump_register(GRXFIFOSIZ(8)),
 184         dump_register(GRXFIFOSIZ(9)),
 185         dump_register(GRXFIFOSIZ(10)),
 186         dump_register(GRXFIFOSIZ(11)),
 187         dump_register(GRXFIFOSIZ(12)),
 188         dump_register(GRXFIFOSIZ(13)),
 189         dump_register(GRXFIFOSIZ(14)),
 190         dump_register(GRXFIFOSIZ(15)),
 191         dump_register(GRXFIFOSIZ(16)),
 192         dump_register(GRXFIFOSIZ(17)),
 193         dump_register(GRXFIFOSIZ(18)),
 194         dump_register(GRXFIFOSIZ(19)),
 195         dump_register(GRXFIFOSIZ(20)),
 196         dump_register(GRXFIFOSIZ(21)),
 197         dump_register(GRXFIFOSIZ(22)),
 198         dump_register(GRXFIFOSIZ(23)),
 199         dump_register(GRXFIFOSIZ(24)),
 200         dump_register(GRXFIFOSIZ(25)),
 201         dump_register(GRXFIFOSIZ(26)),
 202         dump_register(GRXFIFOSIZ(27)),
 203         dump_register(GRXFIFOSIZ(28)),
 204         dump_register(GRXFIFOSIZ(29)),
 205         dump_register(GRXFIFOSIZ(30)),
 206         dump_register(GRXFIFOSIZ(31)),
 207
 208         dump_register(GEVNTADRLO(0)),
 209         dump_register(GEVNTADRHI(0)),
 210         dump_register(GEVNTSIZ(0)),
 211         dump_register(GEVNTCOUNT(0)),
 212
 213         dump_register(GHWPARAMS8),
 214         dump_register(DCFG),
 215         dump_register(DCTL),
 216         dump_register(DEVTEN),
 217         dump_register(DSTS),
 218         dump_register(DGCMDPAR),
 219         dump_register(DGCMD),
 220         dump_register(DALEPENA),
 221
 222         dump_register(DEPCMDPAR2(0)),
 223         dump_register(DEPCMDPAR2(1)),
 224         dump_register(DEPCMDPAR2(2)),
 225         dump_register(DEPCMDPAR2(3)),
 226         dump_register(DEPCMDPAR2(4)),
 227         dump_register(DEPCMDPAR2(5)),
 228         dump_register(DEPCMDPAR2(6)),
 229         dump_register(DEPCMDPAR2(7)),
 230         dump_register(DEPCMDPAR2(8)),
 231         dump_register(DEPCMDPAR2(9)),
 232         dump_register(DEPCMDPAR2(10)),
 233         dump_register(DEPCMDPAR2(11)),
 234         dump_register(DEPCMDPAR2(12)),
 235         dump_register(DEPCMDPAR2(13)),
 236         dump_register(DEPCMDPAR2(14)),
 237         dump_register(DEPCMDPAR2(15)),
 238         dump_register(DEPCMDPAR2(16)),
 239         dump_register(DEPCMDPAR2(17)),
 240         dump_register(DEPCMDPAR2(18)),
 241         dump_register(DEPCMDPAR2(19)),
 242         dump_register(DEPCMDPAR2(20)),
 243         dump_register(DEPCMDPAR2(21)),
 244         dump_register(DEPCMDPAR2(22)),
 245         dump_register(DEPCMDPAR2(23)),
 246         dump_register(DEPCMDPAR2(24)),
 247         dump_register(DEPCMDPAR2(25)),
 248         dump_register(DEPCMDPAR2(26)),
 249         dump_register(DEPCMDPAR2(27)),
 250         dump_register(DEPCMDPAR2(28)),
 251         dump_register(DEPCMDPAR2(29)),
 252         dump_register(DEPCMDPAR2(30)),
 253         dump_register(DEPCMDPAR2(31)),
 254
 255         dump_register(DEPCMDPAR1(0)),
 256         dump_register(DEPCMDPAR1(1)),
 257         dump_register(DEPCMDPAR1(2)),
 258         dump_register(DEPCMDPAR1(3)),
 259         dump_register(DEPCMDPAR1(4)),
 260         dump_register(DEPCMDPAR1(5)),
 261         dump_register(DEPCMDPAR1(6)),
 262         dump_register(DEPCMDPAR1(7)),
 263         dump_register(DEPCMDPAR1(8)),
 264         dump_register(DEPCMDPAR1(9)),
 265         dump_register(DEPCMDPAR1(10)),
 266         dump_register(DEPCMDPAR1(11)),
 267         dump_register(DEPCMDPAR1(12)),
 268         dump_register(DEPCMDPAR1(13)),
 269         dump_register(DEPCMDPAR1(14)),
 270         dump_register(DEPCMDPAR1(15)),
 271         dump_register(DEPCMDPAR1(16)),
 272         dump_register(DEPCMDPAR1(17)),
 273         dump_register(DEPCMDPAR1(18)),
 274         dump_register(DEPCMDPAR1(19)),
 275         dump_register(DEPCMDPAR1(20)),
 276         dump_register(DEPCMDPAR1(21)),
 277         dump_register(DEPCMDPAR1(22)),
 278         dump_register(DEPCMDPAR1(23)),
 279         dump_register(DEPCMDPAR1(24)),
 280         dump_register(DEPCMDPAR1(25)),
 281         dump_register(DEPCMDPAR1(26)),
 282         dump_register(DEPCMDPAR1(27)),
 283         dump_register(DEPCMDPAR1(28)),
 284         dump_register(DEPCMDPAR1(29)),
 285         dump_register(DEPCMDPAR1(30)),
 286         dump_register(DEPCMDPAR1(31)),
 287
 288         dump_register(DEPCMDPAR0(0)),
 289         dump_register(DEPCMDPAR0(1)),
 290         dump_register(DEPCMDPAR0(2)),
 291         dump_register(DEPCMDPAR0(3)),
 292         dump_register(DEPCMDPAR0(4)),
 293         dump_register(DEPCMDPAR0(5)),
 294         dump_register(DEPCMDPAR0(6)),
 295         dump_register(DEPCMDPAR0(7)),
 296         dump_register(DEPCMDPAR0(8)),
 297         dump_register(DEPCMDPAR0(9)),
 298         dump_register(DEPCMDPAR0(10)),
 299         dump_register(DEPCMDPAR0(11)),
 300         dump_register(DEPCMDPAR0(12)),
 301         dump_register(DEPCMDPAR0(13)),
 302         dump_register(DEPCMDPAR0(14)),
 303         dump_register(DEPCMDPAR0(15)),
 304         dump_register(DEPCMDPAR0(16)),
 305         dump_register(DEPCMDPAR0(17)),
 306         dump_register(DEPCMDPAR0(18)),
 307         dump_register(DEPCMDPAR0(19)),
 308         dump_register(DEPCMDPAR0(20)),
 309         dump_register(DEPCMDPAR0(21)),
 310         dump_register(DEPCMDPAR0(22)),
 311         dump_register(DEPCMDPAR0(23)),
 312         dump_register(DEPCMDPAR0(24)),
 313         dump_register(DEPCMDPAR0(25)),
 314         dump_register(DEPCMDPAR0(26)),
 315         dump_register(DEPCMDPAR0(27)),
 316         dump_register(DEPCMDPAR0(28)),
 317         dump_register(DEPCMDPAR0(29)),
 318         dump_register(DEPCMDPAR0(30)),
 319         dump_register(DEPCMDPAR0(31)),
 320
 321         dump_register(DEPCMD(0)),
 322         dump_register(DEPCMD(1)),
 323         dump_register(DEPCMD(2)),
 324         dump_register(DEPCMD(3)),
 325         dump_register(DEPCMD(4)),
 326         dump_register(DEPCMD(5)),
 327         dump_register(DEPCMD(6)),
 328         dump_register(DEPCMD(7)),
 329         dump_register(DEPCMD(8)),
 330         dump_register(DEPCMD(9)),
 331         dump_register(DEPCMD(10)),
 332         dump_register(DEPCMD(11)),
 333         dump_register(DEPCMD(12)),
 334         dump_register(DEPCMD(13)),
 335         dump_register(DEPCMD(14)),
 336         dump_register(DEPCMD(15)),
 337         dump_register(DEPCMD(16)),
 338         dump_register(DEPCMD(17)),
 339         dump_register(DEPCMD(18)),
 340         dump_register(DEPCMD(19)),
 341         dump_register(DEPCMD(20)),
 342         dump_register(DEPCMD(21)),
 343         dump_register(DEPCMD(22)),
 344         dump_register(DEPCMD(23)),
 345         dump_register(DEPCMD(24)),
 346         dump_register(DEPCMD(25)),
 347         dump_register(DEPCMD(26)),
 348         dump_register(DEPCMD(27)),
 349         dump_register(DEPCMD(28)),
 350         dump_register(DEPCMD(29)),
 351         dump_register(DEPCMD(30)),
 352         dump_register(DEPCMD(31)),
 353
 354         dump_register(OCFG),
 355         dump_register(OCTL),
 356         dump_register(OEVT),
 357         dump_register(OEVTEN),
 358         dump_register(OSTS),
 359 };
 360
 361 static int dwc3_mode_show(struct seq_file *s, void *unused)
 362 {
 363         struct dwc3             *dwc = s->private;
 364         unsigned long           flags;
 365         u32                     reg;
 366
 367         spin_lock_irqsave(&dwc->lock, flags);
 368         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 369         spin_unlock_irqrestore(&dwc->lock, flags);
 370
 371         switch (DWC3_GCTL_PRTCAP(reg)) {
 372         case DWC3_GCTL_PRTCAP_HOST:
 373                 seq_printf(s, "host\n");
 374                 break;
 375         case DWC3_GCTL_PRTCAP_DEVICE:
 376                 seq_printf(s, "device\n");
 377                 break;
 378         case DWC3_GCTL_PRTCAP_OTG:
 379                 seq_printf(s, "OTG\n");
 380                 break;
 381         default:
 382                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int dwc3_mode_open(struct inode *inode, struct file *file)
 389 {
 390         return single_open(file, dwc3_mode_show, inode->i_private);
 391 }
 392
 393 static ssize_t dwc3_mode_write(struct file *file,
 394                 const char __user *ubuf, size_t count, loff_t *ppos)
 395 {
 396         struct seq_file         *s = file->private_data;
 397         struct dwc3             *dwc = s->private;
 398         unsigned long           flags;
 399         u32                     mode = 0;
 400         char                    buf[32];
 401
 402         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 403                 return -EFAULT;
 404
 405         if (!strncmp(buf, "host", 4))
 406                 mode |= DWC3_GCTL_PRTCAP_HOST;
 407
 408         if (!strncmp(buf, "device", 6))
 409                 mode |= DWC3_GCTL_PRTCAP_DEVICE;
 410
 411         if (!strncmp(buf, "otg", 3))
 412                 mode |= DWC3_GCTL_PRTCAP_OTG;
 413
 414         if (mode) {
 415                 spin_lock_irqsave(&dwc->lock, flags);
 416                 dwc3_set_mode(dwc, mode);
 417                 spin_unlock_irqrestore(&dwc->lock, flags);
 418         }
 419         return count;
 420 }
 421
 422 static const struct file_operations dwc3_mode_fops = {
 423         .open                   = dwc3_mode_open,
 424         .write                  = dwc3_mode_write,
 425         .read                   = seq_read,
 426         .llseek                 = seq_lseek,
 427         .release                = single_release,
 428 };
 429
 430 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 431 {
 432         struct dwc3             *dwc = s->private;
 433         unsigned long           flags;
 434         u32                     reg;
 435
 436         spin_lock_irqsave(&dwc->lock, flags);
 437         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 438         reg &= DWC3_DCTL_TSTCTRL_MASK;
 439         reg >>= 1;
 440         spin_unlock_irqrestore(&dwc->lock, flags);
 441
 442         switch (reg) {
 443         case 0:
 444                 seq_printf(s, "no test\n");
 445                 break;
 446         case TEST_J:
 447                 seq_printf(s, "test_j\n");
 448                 break;
 449         case TEST_K:
 450                 seq_printf(s, "test_k\n");
 451                 break;
 452         case TEST_SE0_NAK:
 453                 seq_printf(s, "test_se0_nak\n");
 454                 break;
 455         case TEST_PACKET:
 456                 seq_printf(s, "test_packet\n");
 457                 break;
 458         case TEST_FORCE_EN:
 459                 seq_printf(s, "test_force_enable\n");
 460                 break;
 461         default:
 462                 seq_printf(s, "UNKNOWN %d\n", reg);
 463         }
 464
 465         return 0;
 466 }
 467
 468 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 469 {
 470         return single_open(file, dwc3_testmode_show, inode->i_private);
 471 }
 472
 473 static ssize_t dwc3_testmode_write(struct file *file,
 474                 const char __user *ubuf, size_t count, loff_t *ppos)
 475 {
 476         struct seq_file         *s = file->private_data;
 477         struct dwc3             *dwc = s->private;
 478         unsigned long           flags;
 479         u32                     testmode = 0;
 480         char                    buf[32];
 481
 482         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 483                 return -EFAULT;
 484
 485         if (!strncmp(buf, "test_j", 6))
 486                 testmode = TEST_J;
 487         else if (!strncmp(buf, "test_k", 6))
 488                 testmode = TEST_K;
 489         else if (!strncmp(buf, "test_se0_nak", 12))
 490                 testmode = TEST_SE0_NAK;
 491         else if (!strncmp(buf, "test_packet", 11))
 492                 testmode = TEST_PACKET;
 493         else if (!strncmp(buf, "test_force_enable", 17))
 494                 testmode = TEST_FORCE_EN;
 495         else
 496                 testmode = 0;
 497
 498         spin_lock_irqsave(&dwc->lock, flags);
 499         dwc3_gadget_set_test_mode(dwc, testmode);
 500         spin_unlock_irqrestore(&dwc->lock, flags);
 501
 502         return count;
 503 }
 504
 505 static const struct file_operations dwc3_testmode_fops = {
 506         .open                   = dwc3_testmode_open,
 507         .write                  = dwc3_testmode_write,
 508         .read                   = seq_read,
 509         .llseek                 = seq_lseek,
 510         .release                = single_release,
 511 };
 512
 513 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 514 {
 515         struct dwc3             *dwc = s->private;
 516         unsigned long           flags;
 517         enum dwc3_link_state    state;
 518         u32                     reg;
 519
 520         spin_lock_irqsave(&dwc->lock, flags);
 521         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 522         state = DWC3_DSTS_USBLNKST(reg);
 523         spin_unlock_irqrestore(&dwc->lock, flags);
 524
 525         switch (state) {
 526         case DWC3_LINK_STATE_U0:
 527                 seq_printf(s, "U0\n");
 528                 break;
 529         case DWC3_LINK_STATE_U1:
 530                 seq_printf(s, "U1\n");
 531                 break;
 532         case DWC3_LINK_STATE_U2:
 533                 seq_printf(s, "U2\n");
 534                 break;
 535         case DWC3_LINK_STATE_U3:
 536                 seq_printf(s, "U3\n");
 537                 break;
 538         case DWC3_LINK_STATE_SS_DIS:
 539                 seq_printf(s, "SS.Disabled\n");
 540                 break;
 541         case DWC3_LINK_STATE_RX_DET:
 542                 seq_printf(s, "Rx.Detect\n");
 543                 break;
 544         case DWC3_LINK_STATE_SS_INACT:
 545                 seq_printf(s, "SS.Inactive\n");
 546                 break;
 547         case DWC3_LINK_STATE_POLL:
 548                 seq_printf(s, "Poll\n");
 549                 break;
 550         case DWC3_LINK_STATE_RECOV:
 551                 seq_printf(s, "Recovery\n");
 552                 break;
 553         case DWC3_LINK_STATE_HRESET:
 554                 seq_printf(s, "HRESET\n");
 555                 break;
 556         case DWC3_LINK_STATE_CMPLY:
 557                 seq_printf(s, "Compliance\n");
 558                 break;
 559         case DWC3_LINK_STATE_LPBK:
 560                 seq_printf(s, "Loopback\n");
 561                 break;
 562         case DWC3_LINK_STATE_RESET:
 563                 seq_printf(s, "Reset\n");
 564                 break;
 565         case DWC3_LINK_STATE_RESUME:
 566                 seq_printf(s, "Resume\n");
 567                 break;
 568         default:
 569                 seq_printf(s, "UNKNOWN %d\n", state);
 570         }
 571
 572         return 0;
 573 }
 574
 575 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 576 {
 577         return single_open(file, dwc3_link_state_show, inode->i_private);
 578 }
 579
 580 static ssize_t dwc3_link_state_write(struct file *file,
 581                 const char __user *ubuf, size_t count, loff_t *ppos)
 582 {
 583         struct seq_file         *s = file->private_data;
 584         struct dwc3             *dwc = s->private;
 585         unsigned long           flags;
 586         enum dwc3_link_state    state = 0;
 587         char                    buf[32];
 588
 589         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 590                 return -EFAULT;
 591
 592         if (!strncmp(buf, "SS.Disabled", 11))
 593                 state = DWC3_LINK_STATE_SS_DIS;
 594         else if (!strncmp(buf, "Rx.Detect", 9))
 595                 state = DWC3_LINK_STATE_RX_DET;
 596         else if (!strncmp(buf, "SS.Inactive", 11))
 597                 state = DWC3_LINK_STATE_SS_INACT;
 598         else if (!strncmp(buf, "Recovery", 8))
 599                 state = DWC3_LINK_STATE_RECOV;
 600         else if (!strncmp(buf, "Compliance", 10))
 601                 state = DWC3_LINK_STATE_CMPLY;
 602         else if (!strncmp(buf, "Loopback", 8))
 603                 state = DWC3_LINK_STATE_LPBK;
 604         else
 605                 return -EINVAL;
 606
 607         spin_lock_irqsave(&dwc->lock, flags);
 608         dwc3_gadget_set_link_state(dwc, state);
 609         spin_unlock_irqrestore(&dwc->lock, flags);
 610
 611         return count;
 612 }
 613
 614 static const struct file_operations dwc3_link_state_fops = {
 615         .open                   = dwc3_link_state_open,
 616         .write                  = dwc3_link_state_write,
 617         .read                   = seq_read,
 618         .llseek                 = seq_lseek,
 619         .release                = single_release,
 620 };
 621
 622 struct dwc3_ep_file_map {
 623         char name[25];
 624         int (*show)(struct seq_file *s, void *unused);
 625 };
 626
 627 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
 628 {
 629         struct dwc3_ep          *dep = s->private;
 630         struct dwc3             *dwc = dep->dwc;
 631         unsigned long           flags;
 632         u32                     val;
 633
 634         spin_lock_irqsave(&dwc->lock, flags);
 635         val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
 636         seq_printf(s, "%u\n", val);
 637         spin_unlock_irqrestore(&dwc->lock, flags);
 638
 639         return 0;
 640 }
 641
 642 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
 643 {
 644         struct dwc3_ep          *dep = s->private;
 645         struct dwc3             *dwc = dep->dwc;
 646         unsigned long           flags;
 647         u32                     val;
 648
 649         spin_lock_irqsave(&dwc->lock, flags);
 650         val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
 651         seq_printf(s, "%u\n", val);
 652         spin_unlock_irqrestore(&dwc->lock, flags);
 653
 654         return 0;
 655 }
 656
 657 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
 658 {
 659         struct dwc3_ep          *dep = s->private;
 660         struct dwc3             *dwc = dep->dwc;
 661         unsigned long           flags;
 662         u32                     val;
 663
 664         spin_lock_irqsave(&dwc->lock, flags);
 665         val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
 666         seq_printf(s, "%u\n", val);
 667         spin_unlock_irqrestore(&dwc->lock, flags);
 668
 669         return 0;
 670 }
 671
 672 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
 673 {
 674         struct dwc3_ep          *dep = s->private;
 675         struct dwc3             *dwc = dep->dwc;
 676         unsigned long           flags;
 677         u32                     val;
 678
 679         spin_lock_irqsave(&dwc->lock, flags);
 680         val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
 681         seq_printf(s, "%u\n", val);
 682         spin_unlock_irqrestore(&dwc->lock, flags);
 683
 684         return 0;
 685 }
 686
 687 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
 688 {
 689         struct dwc3_ep          *dep = s->private;
 690         struct dwc3             *dwc = dep->dwc;
 691         unsigned long           flags;
 692         u32                     val;
 693
 694         spin_lock_irqsave(&dwc->lock, flags);
 695         val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
 696         seq_printf(s, "%u\n", val);
 697         spin_unlock_irqrestore(&dwc->lock, flags);
 698
 699         return 0;
 700 }
 701
 702 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
 703 {
 704         struct dwc3_ep          *dep = s->private;
 705         struct dwc3             *dwc = dep->dwc;
 706         unsigned long           flags;
 707         u32                     val;
 708
 709         spin_lock_irqsave(&dwc->lock, flags);
 710         val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
 711         seq_printf(s, "%u\n", val);
 712         spin_unlock_irqrestore(&dwc->lock, flags);
 713
 714         return 0;
 715 }
 716
 717 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
 718 {
 719         struct dwc3_ep          *dep = s->private;
 720         struct dwc3             *dwc = dep->dwc;
 721         unsigned long           flags;
 722         u32                     val;
 723
 724         spin_lock_irqsave(&dwc->lock, flags);
 725         val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
 726         seq_printf(s, "%u\n", val);
 727         spin_unlock_irqrestore(&dwc->lock, flags);
 728
 729         return 0;
 730 }
 731
 732 static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused)
 733 {
 734         struct dwc3_ep          *dep = s->private;
 735         struct dwc3             *dwc = dep->dwc;
 736         unsigned long           flags;
 737
 738         spin_lock_irqsave(&dwc->lock, flags);
 739         if (!(dep->flags & DWC3_EP_ENABLED) ||
 740                         !dep->endpoint.desc) {
 741                 seq_printf(s, "--\n");
 742                 goto out;
 743         }
 744
 745         switch (usb_endpoint_type(dep->endpoint.desc)) {
 746         case USB_ENDPOINT_XFER_CONTROL:
 747                 seq_printf(s, "control\n");
 748                 break;
 749         case USB_ENDPOINT_XFER_ISOC:
 750                 seq_printf(s, "isochronous\n");
 751                 break;
 752         case USB_ENDPOINT_XFER_BULK:
 753                 seq_printf(s, "bulk\n");
 754                 break;
 755         case USB_ENDPOINT_XFER_INT:
 756                 seq_printf(s, "interrupt\n");
 757                 break;
 758         default:
 759                 seq_printf(s, "--\n");
 760         }
 761
 762 out:
 763         spin_unlock_irqrestore(&dwc->lock, flags);
 764
 765         return 0;
 766 }
 767
 768 static inline const char *dwc3_trb_type_string(struct dwc3_trb *trb)
 769 {
 770         switch (DWC3_TRBCTL_TYPE(trb->ctrl)) {
 771         case DWC3_TRBCTL_NORMAL:
 772                 return "normal";
 773         case DWC3_TRBCTL_CONTROL_SETUP:
 774                 return "control-setup";
 775         case DWC3_TRBCTL_CONTROL_STATUS2:
 776                 return "control-status2";
 777         case DWC3_TRBCTL_CONTROL_STATUS3:
 778                 return "control-status3";
 779         case DWC3_TRBCTL_CONTROL_DATA:
 780                 return "control-data";
 781         case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
 782                 return "isoc-first";
 783         case DWC3_TRBCTL_ISOCHRONOUS:
 784                 return "isoc";
 785         case DWC3_TRBCTL_LINK_TRB:
 786                 return "link";
 787         default:
 788                 return "UNKNOWN";
 789         }
 790 }
 791
 792 static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused)
 793 {
 794         struct dwc3_ep          *dep = s->private;
 795         struct dwc3             *dwc = dep->dwc;
 796         unsigned long           flags;
 797         int                     i;
 798
 799         spin_lock_irqsave(&dwc->lock, flags);
 800         if (dep->number <= 1) {
 801                 seq_printf(s, "--\n");
 802                 goto out;
 803         }
 804
 805         seq_printf(s, "enqueue pointer %d\n", dep->trb_enqueue);
 806         seq_printf(s, "dequeue pointer %d\n", dep->trb_dequeue);
 807         seq_printf(s, "\n--------------------------------------------------\n\n");
 808         seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
 809
 810         for (i = 0; i < DWC3_TRB_NUM; i++) {
 811                 struct dwc3_trb *trb = &dep->trb_pool[i];
 812
 813                 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d\n",
 814                                 trb->bph, trb->bpl, trb->size,
 815                                 dwc3_trb_type_string(trb),
 816                                 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
 817                                 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
 818                                 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
 819                                 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
 820                                 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
 821                                 !!(trb->ctrl & DWC3_TRB_CTRL_HWO));
 822         }
 823
 824 out:
 825         spin_unlock_irqrestore(&dwc->lock, flags);
 826
 827         return 0;
 828 }
 829
 830 static struct dwc3_ep_file_map map[] = {
 831         { "tx_fifo_queue", dwc3_tx_fifo_queue_show, },
 832         { "rx_fifo_queue", dwc3_rx_fifo_queue_show, },
 833         { "tx_request_queue", dwc3_tx_request_queue_show, },
 834         { "rx_request_queue", dwc3_rx_request_queue_show, },
 835         { "rx_info_queue", dwc3_rx_info_queue_show, },
 836         { "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, },
 837         { "event_queue", dwc3_event_queue_show, },
 838         { "transfer_type", dwc3_ep_transfer_type_show, },
 839         { "trb_ring", dwc3_ep_trb_ring_show, },
 840 };
 841
 842 static int dwc3_endpoint_open(struct inode *inode, struct file *file)
 843 {
 844         const char              *file_name = file_dentry(file)->d_iname;
 845         struct dwc3_ep_file_map *f_map;
 846         int                     i;
 847
 848         for (i = 0; i < ARRAY_SIZE(map); i++) {
 849                 f_map = &map[i];
 850
 851                 if (strcmp(f_map->name, file_name) == 0)
 852                         break;
 853         }
 854
 855         return single_open(file, f_map->show, inode->i_private);
 856 }
 857
 858 static const struct file_operations dwc3_endpoint_fops = {
 859         .open                   = dwc3_endpoint_open,
 860         .read                   = seq_read,
 861         .llseek                 = seq_lseek,
 862         .release                = single_release,
 863 };
 864
 865 static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
 866                 struct dentry *parent, int type)
 867 {
 868         struct dentry           *file;
 869         struct dwc3_ep_file_map *ep_file = &map[type];
 870
 871         file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep,
 872                         &dwc3_endpoint_fops);
 873 }
 874
 875 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
 876                 struct dentry *parent)
 877 {
 878         int                     i;
 879
 880         for (i = 0; i < ARRAY_SIZE(map); i++)
 881                 dwc3_debugfs_create_endpoint_file(dep, parent, i);
 882 }
 883
 884 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
 885                 struct dentry *parent)
 886 {
 887         struct dentry           *dir;
 888
 889         dir = debugfs_create_dir(dep->name, parent);
 890         if (IS_ERR_OR_NULL(dir))
 891                 return;
 892
 893         dwc3_debugfs_create_endpoint_files(dep, dir);
 894 }
 895
 896 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
 897                 struct dentry *parent)
 898 {
 899         int                     i;
 900
 901         for (i = 0; i < dwc->num_in_eps; i++) {
 902                 u8              epnum = (i << 1) | 1;
 903                 struct dwc3_ep  *dep = dwc->eps[epnum];
 904
 905                 if (!dep)
 906                         continue;
 907
 908                 dwc3_debugfs_create_endpoint_dir(dep, parent);
 909         }
 910
 911         for (i = 0; i < dwc->num_out_eps; i++) {
 912                 u8              epnum = (i << 1);
 913                 struct dwc3_ep  *dep = dwc->eps[epnum];
 914
 915                 if (!dep)
 916                         continue;
 917
 918                 dwc3_debugfs_create_endpoint_dir(dep, parent);
 919         }
 920 }
 921
 922 void dwc3_debugfs_init(struct dwc3 *dwc)
 923 {
 924         struct dentry           *root;
 925         struct dentry           *file;
 926
 927         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 928         if (IS_ERR_OR_NULL(root)) {
 929                 if (!root)
 930                         dev_err(dwc->dev, "Can't create debugfs root\n");
 931                 return;
 932         }
 933         dwc->root = root;
 934
 935         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
 936         if (!dwc->regset) {
 937                 debugfs_remove_recursive(root);
 938                 return;
 939         }
 940
 941         dwc->regset->regs = dwc3_regs;
 942         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
 943         dwc->regset->base = dwc->regs;
 944
 945         file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
 946         if (!file)
 947                 dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
 948
 949         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
 950                 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
 951                                 dwc, &dwc3_mode_fops);
 952                 if (!file)
 953                         dev_dbg(dwc->dev, "Can't create debugfs mode\n");
 954         }
 955
 956         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
 957                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
 958                 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
 959                                 dwc, &dwc3_testmode_fops);
 960                 if (!file)
 961                         dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
 962
 963                 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
 964                                 root, dwc, &dwc3_link_state_fops);
 965                 if (!file)
 966                         dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
 967
 968                 dwc3_debugfs_create_endpoint_dirs(dwc, root);
 969         }
 970 }
 971
 972 void dwc3_debugfs_exit(struct dwc3 *dwc)
 973 {
 974         debugfs_remove_recursive(dwc->root);
 975         kfree(dwc->regset);
 976 }