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         u32                     mode = 0;
 323         char                    buf[32];
 324
 325         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 326                 return -EFAULT;
 327
 328         if (!strncmp(buf, "host", 4))
 329                 mode = DWC3_GCTL_PRTCAP_HOST;
 330
 331         if (!strncmp(buf, "device", 6))
 332                 mode = DWC3_GCTL_PRTCAP_DEVICE;
 333
 334         if (!strncmp(buf, "otg", 3))
 335                 mode = DWC3_GCTL_PRTCAP_OTG;
 336
 337         dwc3_set_mode(dwc, mode);
 338
 339         return count;
 340 }
 341
 342 static const struct file_operations dwc3_mode_fops = {
 343         .open                   = dwc3_mode_open,
 344         .write                  = dwc3_mode_write,
 345         .read                   = seq_read,
 346         .llseek                 = seq_lseek,
 347         .release                = single_release,
 348 };
 349
 350 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 351 {
 352         struct dwc3             *dwc = s->private;
 353         unsigned long           flags;
 354         u32                     reg;
 355
 356         spin_lock_irqsave(&dwc->lock, flags);
 357         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 358         reg &= DWC3_DCTL_TSTCTRL_MASK;
 359         reg >>= 1;
 360         spin_unlock_irqrestore(&dwc->lock, flags);
 361
 362         switch (reg) {
 363         case 0:
 364                 seq_printf(s, "no test\n");
 365                 break;
 366         case TEST_J:
 367                 seq_printf(s, "test_j\n");
 368                 break;
 369         case TEST_K:
 370                 seq_printf(s, "test_k\n");
 371                 break;
 372         case TEST_SE0_NAK:
 373                 seq_printf(s, "test_se0_nak\n");
 374                 break;
 375         case TEST_PACKET:
 376                 seq_printf(s, "test_packet\n");
 377                 break;
 378         case TEST_FORCE_EN:
 379                 seq_printf(s, "test_force_enable\n");
 380                 break;
 381         default:
 382                 seq_printf(s, "UNKNOWN %d\n", reg);
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 389 {
 390         return single_open(file, dwc3_testmode_show, inode->i_private);
 391 }
 392
 393 static ssize_t dwc3_testmode_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                     testmode = 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, "test_j", 6))
 406                 testmode = TEST_J;
 407         else if (!strncmp(buf, "test_k", 6))
 408                 testmode = TEST_K;
 409         else if (!strncmp(buf, "test_se0_nak", 12))
 410                 testmode = TEST_SE0_NAK;
 411         else if (!strncmp(buf, "test_packet", 11))
 412                 testmode = TEST_PACKET;
 413         else if (!strncmp(buf, "test_force_enable", 17))
 414                 testmode = TEST_FORCE_EN;
 415         else
 416                 testmode = 0;
 417
 418         spin_lock_irqsave(&dwc->lock, flags);
 419         dwc3_gadget_set_test_mode(dwc, testmode);
 420         spin_unlock_irqrestore(&dwc->lock, flags);
 421
 422         return count;
 423 }
 424
 425 static const struct file_operations dwc3_testmode_fops = {
 426         .open                   = dwc3_testmode_open,
 427         .write                  = dwc3_testmode_write,
 428         .read                   = seq_read,
 429         .llseek                 = seq_lseek,
 430         .release                = single_release,
 431 };
 432
 433 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 434 {
 435         struct dwc3             *dwc = s->private;
 436         unsigned long           flags;
 437         enum dwc3_link_state    state;
 438         u32                     reg;
 439         u8                      speed;
 440
 441         spin_lock_irqsave(&dwc->lock, flags);
 442         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 443         state = DWC3_DSTS_USBLNKST(reg);
 444         speed = reg & DWC3_DSTS_CONNECTSPD;
 445
 446         seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
 447                    dwc3_gadget_link_string(state) :
 448                    dwc3_gadget_hs_link_string(state));
 449         spin_unlock_irqrestore(&dwc->lock, flags);
 450
 451         return 0;
 452 }
 453
 454 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 455 {
 456         return single_open(file, dwc3_link_state_show, inode->i_private);
 457 }
 458
 459 static ssize_t dwc3_link_state_write(struct file *file,
 460                 const char __user *ubuf, size_t count, loff_t *ppos)
 461 {
 462         struct seq_file         *s = file->private_data;
 463         struct dwc3             *dwc = s->private;
 464         unsigned long           flags;
 465         enum dwc3_link_state    state = 0;
 466         char                    buf[32];
 467         u32                     reg;
 468         u8                      speed;
 469
 470         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 471                 return -EFAULT;
 472
 473         if (!strncmp(buf, "SS.Disabled", 11))
 474                 state = DWC3_LINK_STATE_SS_DIS;
 475         else if (!strncmp(buf, "Rx.Detect", 9))
 476                 state = DWC3_LINK_STATE_RX_DET;
 477         else if (!strncmp(buf, "SS.Inactive", 11))
 478                 state = DWC3_LINK_STATE_SS_INACT;
 479         else if (!strncmp(buf, "Recovery", 8))
 480                 state = DWC3_LINK_STATE_RECOV;
 481         else if (!strncmp(buf, "Compliance", 10))
 482                 state = DWC3_LINK_STATE_CMPLY;
 483         else if (!strncmp(buf, "Loopback", 8))
 484                 state = DWC3_LINK_STATE_LPBK;
 485         else
 486                 return -EINVAL;
 487
 488         spin_lock_irqsave(&dwc->lock, flags);
 489         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 490         speed = reg & DWC3_DSTS_CONNECTSPD;
 491
 492         if (speed < DWC3_DSTS_SUPERSPEED &&
 493             state != DWC3_LINK_STATE_RECOV) {
 494                 spin_unlock_irqrestore(&dwc->lock, flags);
 495                 return -EINVAL;
 496         }
 497
 498         dwc3_gadget_set_link_state(dwc, state);
 499         spin_unlock_irqrestore(&dwc->lock, flags);
 500
 501         return count;
 502 }
 503
 504 static const struct file_operations dwc3_link_state_fops = {
 505         .open                   = dwc3_link_state_open,
 506         .write                  = dwc3_link_state_write,
 507         .read                   = seq_read,
 508         .llseek                 = seq_lseek,
 509         .release                = single_release,
 510 };
 511
 512 struct dwc3_ep_file_map {
 513         char name[25];
 514         int (*show)(struct seq_file *s, void *unused);
 515 };
 516
 517 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
 518 {
 519         struct dwc3_ep          *dep = s->private;
 520         struct dwc3             *dwc = dep->dwc;
 521         unsigned long           flags;
 522         u32                     val;
 523
 524         spin_lock_irqsave(&dwc->lock, flags);
 525         val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
 526         seq_printf(s, "%u\n", val);
 527         spin_unlock_irqrestore(&dwc->lock, flags);
 528
 529         return 0;
 530 }
 531
 532 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
 533 {
 534         struct dwc3_ep          *dep = s->private;
 535         struct dwc3             *dwc = dep->dwc;
 536         unsigned long           flags;
 537         u32                     val;
 538
 539         spin_lock_irqsave(&dwc->lock, flags);
 540         val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
 541         seq_printf(s, "%u\n", val);
 542         spin_unlock_irqrestore(&dwc->lock, flags);
 543
 544         return 0;
 545 }
 546
 547 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
 548 {
 549         struct dwc3_ep          *dep = s->private;
 550         struct dwc3             *dwc = dep->dwc;
 551         unsigned long           flags;
 552         u32                     val;
 553
 554         spin_lock_irqsave(&dwc->lock, flags);
 555         val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
 556         seq_printf(s, "%u\n", val);
 557         spin_unlock_irqrestore(&dwc->lock, flags);
 558
 559         return 0;
 560 }
 561
 562 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
 563 {
 564         struct dwc3_ep          *dep = s->private;
 565         struct dwc3             *dwc = dep->dwc;
 566         unsigned long           flags;
 567         u32                     val;
 568
 569         spin_lock_irqsave(&dwc->lock, flags);
 570         val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
 571         seq_printf(s, "%u\n", val);
 572         spin_unlock_irqrestore(&dwc->lock, flags);
 573
 574         return 0;
 575 }
 576
 577 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
 578 {
 579         struct dwc3_ep          *dep = s->private;
 580         struct dwc3             *dwc = dep->dwc;
 581         unsigned long           flags;
 582         u32                     val;
 583
 584         spin_lock_irqsave(&dwc->lock, flags);
 585         val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
 586         seq_printf(s, "%u\n", val);
 587         spin_unlock_irqrestore(&dwc->lock, flags);
 588
 589         return 0;
 590 }
 591
 592 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
 593 {
 594         struct dwc3_ep          *dep = s->private;
 595         struct dwc3             *dwc = dep->dwc;
 596         unsigned long           flags;
 597         u32                     val;
 598
 599         spin_lock_irqsave(&dwc->lock, flags);
 600         val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
 601         seq_printf(s, "%u\n", val);
 602         spin_unlock_irqrestore(&dwc->lock, flags);
 603
 604         return 0;
 605 }
 606
 607 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
 608 {
 609         struct dwc3_ep          *dep = s->private;
 610         struct dwc3             *dwc = dep->dwc;
 611         unsigned long           flags;
 612         u32                     val;
 613
 614         spin_lock_irqsave(&dwc->lock, flags);
 615         val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
 616         seq_printf(s, "%u\n", val);
 617         spin_unlock_irqrestore(&dwc->lock, flags);
 618
 619         return 0;
 620 }
 621
 622 static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused)
 623 {
 624         struct dwc3_ep          *dep = s->private;
 625         struct dwc3             *dwc = dep->dwc;
 626         unsigned long           flags;
 627
 628         spin_lock_irqsave(&dwc->lock, flags);
 629         if (!(dep->flags & DWC3_EP_ENABLED) ||
 630                         !dep->endpoint.desc) {
 631                 seq_printf(s, "--\n");
 632                 goto out;
 633         }
 634
 635         switch (usb_endpoint_type(dep->endpoint.desc)) {
 636         case USB_ENDPOINT_XFER_CONTROL:
 637                 seq_printf(s, "control\n");
 638                 break;
 639         case USB_ENDPOINT_XFER_ISOC:
 640                 seq_printf(s, "isochronous\n");
 641                 break;
 642         case USB_ENDPOINT_XFER_BULK:
 643                 seq_printf(s, "bulk\n");
 644                 break;
 645         case USB_ENDPOINT_XFER_INT:
 646                 seq_printf(s, "interrupt\n");
 647                 break;
 648         default:
 649                 seq_printf(s, "--\n");
 650         }
 651
 652 out:
 653         spin_unlock_irqrestore(&dwc->lock, flags);
 654
 655         return 0;
 656 }
 657
 658 static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused)
 659 {
 660         struct dwc3_ep          *dep = s->private;
 661         struct dwc3             *dwc = dep->dwc;
 662         unsigned long           flags;
 663         int                     i;
 664
 665         spin_lock_irqsave(&dwc->lock, flags);
 666         if (dep->number <= 1) {
 667                 seq_printf(s, "--\n");
 668                 goto out;
 669         }
 670
 671         seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
 672
 673         for (i = 0; i < DWC3_TRB_NUM; i++) {
 674                 struct dwc3_trb *trb = &dep->trb_pool[i];
 675                 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
 676
 677                 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d       %c%c\n",
 678                                 trb->bph, trb->bpl, trb->size,
 679                                 dwc3_trb_type_string(type),
 680                                 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
 681                                 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
 682                                 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
 683                                 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
 684                                 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
 685                                 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
 686                                 dep->trb_enqueue == i ? 'E' : ' ',
 687                                 dep->trb_dequeue == i ? 'D' : ' ');
 688         }
 689
 690 out:
 691         spin_unlock_irqrestore(&dwc->lock, flags);
 692
 693         return 0;
 694 }
 695
 696 static struct dwc3_ep_file_map map[] = {
 697         { "tx_fifo_queue", dwc3_tx_fifo_queue_show, },
 698         { "rx_fifo_queue", dwc3_rx_fifo_queue_show, },
 699         { "tx_request_queue", dwc3_tx_request_queue_show, },
 700         { "rx_request_queue", dwc3_rx_request_queue_show, },
 701         { "rx_info_queue", dwc3_rx_info_queue_show, },
 702         { "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, },
 703         { "event_queue", dwc3_event_queue_show, },
 704         { "transfer_type", dwc3_ep_transfer_type_show, },
 705         { "trb_ring", dwc3_ep_trb_ring_show, },
 706 };
 707
 708 static int dwc3_endpoint_open(struct inode *inode, struct file *file)
 709 {
 710         const char              *file_name = file_dentry(file)->d_iname;
 711         struct dwc3_ep_file_map *f_map;
 712         int                     i;
 713
 714         for (i = 0; i < ARRAY_SIZE(map); i++) {
 715                 f_map = &map[i];
 716
 717                 if (strcmp(f_map->name, file_name) == 0)
 718                         break;
 719         }
 720
 721         return single_open(file, f_map->show, inode->i_private);
 722 }
 723
 724 static const struct file_operations dwc3_endpoint_fops = {
 725         .open                   = dwc3_endpoint_open,
 726         .read                   = seq_read,
 727         .llseek                 = seq_lseek,
 728         .release                = single_release,
 729 };
 730
 731 static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
 732                 struct dentry *parent, int type)
 733 {
 734         struct dentry           *file;
 735         struct dwc3_ep_file_map *ep_file = &map[type];
 736
 737         file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep,
 738                         &dwc3_endpoint_fops);
 739 }
 740
 741 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
 742                 struct dentry *parent)
 743 {
 744         int                     i;
 745
 746         for (i = 0; i < ARRAY_SIZE(map); i++)
 747                 dwc3_debugfs_create_endpoint_file(dep, parent, i);
 748 }
 749
 750 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
 751                 struct dentry *parent)
 752 {
 753         struct dentry           *dir;
 754
 755         dir = debugfs_create_dir(dep->name, parent);
 756         if (IS_ERR_OR_NULL(dir))
 757                 return;
 758
 759         dwc3_debugfs_create_endpoint_files(dep, dir);
 760 }
 761
 762 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
 763                 struct dentry *parent)
 764 {
 765         int                     i;
 766
 767         for (i = 0; i < dwc->num_eps; i++) {
 768                 struct dwc3_ep  *dep = dwc->eps[i];
 769
 770                 if (!dep)
 771                         continue;
 772
 773                 dwc3_debugfs_create_endpoint_dir(dep, parent);
 774         }
 775 }
 776
 777 void dwc3_debugfs_init(struct dwc3 *dwc)
 778 {
 779         struct dentry           *root;
 780         struct dentry           *file;
 781
 782         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 783         if (IS_ERR_OR_NULL(root)) {
 784                 if (!root)
 785                         dev_err(dwc->dev, "Can't create debugfs root\n");
 786                 return;
 787         }
 788         dwc->root = root;
 789
 790         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
 791         if (!dwc->regset) {
 792                 debugfs_remove_recursive(root);
 793                 return;
 794         }
 795
 796         dwc->regset->regs = dwc3_regs;
 797         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
 798         dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
 799
 800         file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
 801         if (!file)
 802                 dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
 803
 804         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
 805                 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
 806                                 dwc, &dwc3_mode_fops);
 807                 if (!file)
 808                         dev_dbg(dwc->dev, "Can't create debugfs mode\n");
 809         }
 810
 811         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
 812                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
 813                 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
 814                                 dwc, &dwc3_testmode_fops);
 815                 if (!file)
 816                         dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
 817
 818                 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
 819                                 root, dwc, &dwc3_link_state_fops);
 820                 if (!file)
 821                         dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
 822
 823                 dwc3_debugfs_create_endpoint_dirs(dwc, root);
 824         }
 825 }
 826
 827 void dwc3_debugfs_exit(struct dwc3 *dwc)
 828 {
 829         debugfs_remove_recursive(dwc->root);
 830         kfree(dwc->regset);
 831 }