drivers/usb/dwc3/debugfs.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
   4  *
   5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
   6  *
   7  * Authors: Felipe Balbi <[email protected]>,
   8  *          Sebastian Andrzej Siewior <[email protected]>
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/slab.h>
  13 #include <linux/ptrace.h>
  14 #include <linux/types.h>
  15 #include <linux/spinlock.h>
  16 #include <linux/debugfs.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/delay.h>
  19 #include <linux/uaccess.h>
  20
  21 #include <linux/usb/ch9.h>
  22
  23 #include "core.h"
  24 #include "gadget.h"
  25 #include "io.h"
  26 #include "debug.h"
  27
  28 #define DWC3_LSP_MUX_UNSELECTED 0xfffff
  29
  30 #define dump_register(nm)                               \
  31 {                                                       \
  32         .name   = __stringify(nm),                      \
  33         .offset = DWC3_ ##nm,                           \
  34 }
  35
  36 #define dump_ep_register_set(n)                 \
  37         {                                       \
  38                 .name = "DEPCMDPAR2("__stringify(n)")", \
  39                 .offset = DWC3_DEP_BASE(n) +    \
  40                         DWC3_DEPCMDPAR2,        \
  41         },                                      \
  42         {                                       \
  43                 .name = "DEPCMDPAR1("__stringify(n)")", \
  44                 .offset = DWC3_DEP_BASE(n) +    \
  45                         DWC3_DEPCMDPAR1,        \
  46         },                                      \
  47         {                                       \
  48                 .name = "DEPCMDPAR0("__stringify(n)")", \
  49                 .offset = DWC3_DEP_BASE(n) +    \
  50                         DWC3_DEPCMDPAR0,        \
  51         },                                      \
  52         {                                       \
  53                 .name = "DEPCMD("__stringify(n)")",     \
  54                 .offset = DWC3_DEP_BASE(n) +    \
  55                         DWC3_DEPCMD,            \
  56         }
  57
  58
  59 static const struct debugfs_reg32 dwc3_regs[] = {
  60         dump_register(GSBUSCFG0),
  61         dump_register(GSBUSCFG1),
  62         dump_register(GTXTHRCFG),
  63         dump_register(GRXTHRCFG),
  64         dump_register(GCTL),
  65         dump_register(GEVTEN),
  66         dump_register(GSTS),
  67         dump_register(GUCTL1),
  68         dump_register(GSNPSID),
  69         dump_register(GGPIO),
  70         dump_register(GUID),
  71         dump_register(GUCTL),
  72         dump_register(GBUSERRADDR0),
  73         dump_register(GBUSERRADDR1),
  74         dump_register(GPRTBIMAP0),
  75         dump_register(GPRTBIMAP1),
  76         dump_register(GHWPARAMS0),
  77         dump_register(GHWPARAMS1),
  78         dump_register(GHWPARAMS2),
  79         dump_register(GHWPARAMS3),
  80         dump_register(GHWPARAMS4),
  81         dump_register(GHWPARAMS5),
  82         dump_register(GHWPARAMS6),
  83         dump_register(GHWPARAMS7),
  84         dump_register(GDBGFIFOSPACE),
  85         dump_register(GDBGLTSSM),
  86         dump_register(GDBGBMU),
  87         dump_register(GPRTBIMAP_HS0),
  88         dump_register(GPRTBIMAP_HS1),
  89         dump_register(GPRTBIMAP_FS0),
  90         dump_register(GPRTBIMAP_FS1),
  91         dump_register(GUCTL2),
  92         dump_register(VER_NUMBER),
  93         dump_register(VER_TYPE),
  94
  95         dump_register(GUSB2PHYCFG(0)),
  96         dump_register(GUSB2PHYCFG(1)),
  97         dump_register(GUSB2PHYCFG(2)),
  98         dump_register(GUSB2PHYCFG(3)),
  99         dump_register(GUSB2PHYCFG(4)),
 100         dump_register(GUSB2PHYCFG(5)),
 101         dump_register(GUSB2PHYCFG(6)),
 102         dump_register(GUSB2PHYCFG(7)),
 103         dump_register(GUSB2PHYCFG(8)),
 104         dump_register(GUSB2PHYCFG(9)),
 105         dump_register(GUSB2PHYCFG(10)),
 106         dump_register(GUSB2PHYCFG(11)),
 107         dump_register(GUSB2PHYCFG(12)),
 108         dump_register(GUSB2PHYCFG(13)),
 109         dump_register(GUSB2PHYCFG(14)),
 110         dump_register(GUSB2PHYCFG(15)),
 111
 112         dump_register(GUSB2I2CCTL(0)),
 113         dump_register(GUSB2I2CCTL(1)),
 114         dump_register(GUSB2I2CCTL(2)),
 115         dump_register(GUSB2I2CCTL(3)),
 116         dump_register(GUSB2I2CCTL(4)),
 117         dump_register(GUSB2I2CCTL(5)),
 118         dump_register(GUSB2I2CCTL(6)),
 119         dump_register(GUSB2I2CCTL(7)),
 120         dump_register(GUSB2I2CCTL(8)),
 121         dump_register(GUSB2I2CCTL(9)),
 122         dump_register(GUSB2I2CCTL(10)),
 123         dump_register(GUSB2I2CCTL(11)),
 124         dump_register(GUSB2I2CCTL(12)),
 125         dump_register(GUSB2I2CCTL(13)),
 126         dump_register(GUSB2I2CCTL(14)),
 127         dump_register(GUSB2I2CCTL(15)),
 128
 129         dump_register(GUSB2PHYACC(0)),
 130         dump_register(GUSB2PHYACC(1)),
 131         dump_register(GUSB2PHYACC(2)),
 132         dump_register(GUSB2PHYACC(3)),
 133         dump_register(GUSB2PHYACC(4)),
 134         dump_register(GUSB2PHYACC(5)),
 135         dump_register(GUSB2PHYACC(6)),
 136         dump_register(GUSB2PHYACC(7)),
 137         dump_register(GUSB2PHYACC(8)),
 138         dump_register(GUSB2PHYACC(9)),
 139         dump_register(GUSB2PHYACC(10)),
 140         dump_register(GUSB2PHYACC(11)),
 141         dump_register(GUSB2PHYACC(12)),
 142         dump_register(GUSB2PHYACC(13)),
 143         dump_register(GUSB2PHYACC(14)),
 144         dump_register(GUSB2PHYACC(15)),
 145
 146         dump_register(GUSB3PIPECTL(0)),
 147         dump_register(GUSB3PIPECTL(1)),
 148         dump_register(GUSB3PIPECTL(2)),
 149         dump_register(GUSB3PIPECTL(3)),
 150         dump_register(GUSB3PIPECTL(4)),
 151         dump_register(GUSB3PIPECTL(5)),
 152         dump_register(GUSB3PIPECTL(6)),
 153         dump_register(GUSB3PIPECTL(7)),
 154         dump_register(GUSB3PIPECTL(8)),
 155         dump_register(GUSB3PIPECTL(9)),
 156         dump_register(GUSB3PIPECTL(10)),
 157         dump_register(GUSB3PIPECTL(11)),
 158         dump_register(GUSB3PIPECTL(12)),
 159         dump_register(GUSB3PIPECTL(13)),
 160         dump_register(GUSB3PIPECTL(14)),
 161         dump_register(GUSB3PIPECTL(15)),
 162
 163         dump_register(GTXFIFOSIZ(0)),
 164         dump_register(GTXFIFOSIZ(1)),
 165         dump_register(GTXFIFOSIZ(2)),
 166         dump_register(GTXFIFOSIZ(3)),
 167         dump_register(GTXFIFOSIZ(4)),
 168         dump_register(GTXFIFOSIZ(5)),
 169         dump_register(GTXFIFOSIZ(6)),
 170         dump_register(GTXFIFOSIZ(7)),
 171         dump_register(GTXFIFOSIZ(8)),
 172         dump_register(GTXFIFOSIZ(9)),
 173         dump_register(GTXFIFOSIZ(10)),
 174         dump_register(GTXFIFOSIZ(11)),
 175         dump_register(GTXFIFOSIZ(12)),
 176         dump_register(GTXFIFOSIZ(13)),
 177         dump_register(GTXFIFOSIZ(14)),
 178         dump_register(GTXFIFOSIZ(15)),
 179         dump_register(GTXFIFOSIZ(16)),
 180         dump_register(GTXFIFOSIZ(17)),
 181         dump_register(GTXFIFOSIZ(18)),
 182         dump_register(GTXFIFOSIZ(19)),
 183         dump_register(GTXFIFOSIZ(20)),
 184         dump_register(GTXFIFOSIZ(21)),
 185         dump_register(GTXFIFOSIZ(22)),
 186         dump_register(GTXFIFOSIZ(23)),
 187         dump_register(GTXFIFOSIZ(24)),
 188         dump_register(GTXFIFOSIZ(25)),
 189         dump_register(GTXFIFOSIZ(26)),
 190         dump_register(GTXFIFOSIZ(27)),
 191         dump_register(GTXFIFOSIZ(28)),
 192         dump_register(GTXFIFOSIZ(29)),
 193         dump_register(GTXFIFOSIZ(30)),
 194         dump_register(GTXFIFOSIZ(31)),
 195
 196         dump_register(GRXFIFOSIZ(0)),
 197         dump_register(GRXFIFOSIZ(1)),
 198         dump_register(GRXFIFOSIZ(2)),
 199         dump_register(GRXFIFOSIZ(3)),
 200         dump_register(GRXFIFOSIZ(4)),
 201         dump_register(GRXFIFOSIZ(5)),
 202         dump_register(GRXFIFOSIZ(6)),
 203         dump_register(GRXFIFOSIZ(7)),
 204         dump_register(GRXFIFOSIZ(8)),
 205         dump_register(GRXFIFOSIZ(9)),
 206         dump_register(GRXFIFOSIZ(10)),
 207         dump_register(GRXFIFOSIZ(11)),
 208         dump_register(GRXFIFOSIZ(12)),
 209         dump_register(GRXFIFOSIZ(13)),
 210         dump_register(GRXFIFOSIZ(14)),
 211         dump_register(GRXFIFOSIZ(15)),
 212         dump_register(GRXFIFOSIZ(16)),
 213         dump_register(GRXFIFOSIZ(17)),
 214         dump_register(GRXFIFOSIZ(18)),
 215         dump_register(GRXFIFOSIZ(19)),
 216         dump_register(GRXFIFOSIZ(20)),
 217         dump_register(GRXFIFOSIZ(21)),
 218         dump_register(GRXFIFOSIZ(22)),
 219         dump_register(GRXFIFOSIZ(23)),
 220         dump_register(GRXFIFOSIZ(24)),
 221         dump_register(GRXFIFOSIZ(25)),
 222         dump_register(GRXFIFOSIZ(26)),
 223         dump_register(GRXFIFOSIZ(27)),
 224         dump_register(GRXFIFOSIZ(28)),
 225         dump_register(GRXFIFOSIZ(29)),
 226         dump_register(GRXFIFOSIZ(30)),
 227         dump_register(GRXFIFOSIZ(31)),
 228
 229         dump_register(GEVNTADRLO(0)),
 230         dump_register(GEVNTADRHI(0)),
 231         dump_register(GEVNTSIZ(0)),
 232         dump_register(GEVNTCOUNT(0)),
 233
 234         dump_register(GHWPARAMS8),
 235         dump_register(GUCTL3),
 236         dump_register(GFLADJ),
 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 void dwc3_host_lsp(struct seq_file *s)
 286 {
 287         struct dwc3             *dwc = s->private;
 288         bool                    dbc_enabled;
 289         u32                     sel;
 290         u32                     reg;
 291         u32                     val;
 292
 293         dbc_enabled = !!(dwc->hwparams.hwparams1 & DWC3_GHWPARAMS1_ENDBC);
 294
 295         sel = dwc->dbg_lsp_select;
 296         if (sel == DWC3_LSP_MUX_UNSELECTED) {
 297                 seq_puts(s, "Write LSP selection to print for host\n");
 298                 return;
 299         }
 300
 301         reg = DWC3_GDBGLSPMUX_HOSTSELECT(sel);
 302
 303         dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
 304         val = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
 305         seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", sel, val);
 306
 307         if (dbc_enabled && sel < 256) {
 308                 reg |= DWC3_GDBGLSPMUX_ENDBC;
 309                 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
 310                 val = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
 311                 seq_printf(s, "GDBGLSP_DBC[%d] = 0x%08x\n", sel, val);
 312         }
 313 }
 314
 315 static void dwc3_gadget_lsp(struct seq_file *s)
 316 {
 317         struct dwc3             *dwc = s->private;
 318         int                     i;
 319         u32                     reg;
 320
 321         for (i = 0; i < 16; i++) {
 322                 reg = DWC3_GDBGLSPMUX_DEVSELECT(i);
 323                 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
 324                 reg = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
 325                 seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", i, reg);
 326         }
 327 }
 328
 329 static int dwc3_lsp_show(struct seq_file *s, void *unused)
 330 {
 331         struct dwc3             *dwc = s->private;
 332         unsigned int            current_mode;
 333         unsigned long           flags;
 334         u32                     reg;
 335         int                     ret;
 336
 337         ret = pm_runtime_resume_and_get(dwc->dev);
 338         if (ret < 0)
 339                 return ret;
 340
 341         spin_lock_irqsave(&dwc->lock, flags);
 342         reg = dwc3_readl(dwc->regs, DWC3_GSTS);
 343         current_mode = DWC3_GSTS_CURMOD(reg);
 344
 345         switch (current_mode) {
 346         case DWC3_GSTS_CURMOD_HOST:
 347                 dwc3_host_lsp(s);
 348                 break;
 349         case DWC3_GSTS_CURMOD_DEVICE:
 350                 dwc3_gadget_lsp(s);
 351                 break;
 352         default:
 353                 seq_puts(s, "Mode is unknown, no LSP register printed\n");
 354                 break;
 355         }
 356         spin_unlock_irqrestore(&dwc->lock, flags);
 357
 358         pm_runtime_put_sync(dwc->dev);
 359
 360         return 0;
 361 }
 362
 363 static int dwc3_lsp_open(struct inode *inode, struct file *file)
 364 {
 365         return single_open(file, dwc3_lsp_show, inode->i_private);
 366 }
 367
 368 static ssize_t dwc3_lsp_write(struct file *file, const char __user *ubuf,
 369                               size_t count, loff_t *ppos)
 370 {
 371         struct seq_file         *s = file->private_data;
 372         struct dwc3             *dwc = s->private;
 373         unsigned long           flags;
 374         char                    buf[32] = { 0 };
 375         u32                     sel;
 376         int                     ret;
 377
 378         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 379                 return -EFAULT;
 380
 381         ret = kstrtouint(buf, 0, &sel);
 382         if (ret)
 383                 return ret;
 384
 385         spin_lock_irqsave(&dwc->lock, flags);
 386         dwc->dbg_lsp_select = sel;
 387         spin_unlock_irqrestore(&dwc->lock, flags);
 388
 389         return count;
 390 }
 391
 392 static const struct file_operations dwc3_lsp_fops = {
 393         .open                   = dwc3_lsp_open,
 394         .write                  = dwc3_lsp_write,
 395         .read                   = seq_read,
 396         .llseek                 = seq_lseek,
 397         .release                = single_release,
 398 };
 399
 400 static int dwc3_mode_show(struct seq_file *s, void *unused)
 401 {
 402         struct dwc3             *dwc = s->private;
 403         unsigned long           flags;
 404         u32                     reg;
 405         int                     ret;
 406
 407         ret = pm_runtime_resume_and_get(dwc->dev);
 408         if (ret < 0)
 409                 return ret;
 410
 411         spin_lock_irqsave(&dwc->lock, flags);
 412         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 413         spin_unlock_irqrestore(&dwc->lock, flags);
 414
 415         switch (DWC3_GCTL_PRTCAP(reg)) {
 416         case DWC3_GCTL_PRTCAP_HOST:
 417                 seq_puts(s, "host\n");
 418                 break;
 419         case DWC3_GCTL_PRTCAP_DEVICE:
 420                 seq_puts(s, "device\n");
 421                 break;
 422         case DWC3_GCTL_PRTCAP_OTG:
 423                 seq_puts(s, "otg\n");
 424                 break;
 425         default:
 426                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 427         }
 428
 429         pm_runtime_put_sync(dwc->dev);
 430
 431         return 0;
 432 }
 433
 434 static int dwc3_mode_open(struct inode *inode, struct file *file)
 435 {
 436         return single_open(file, dwc3_mode_show, inode->i_private);
 437 }
 438
 439 static ssize_t dwc3_mode_write(struct file *file,
 440                 const char __user *ubuf, size_t count, loff_t *ppos)
 441 {
 442         struct seq_file         *s = file->private_data;
 443         struct dwc3             *dwc = s->private;
 444         u32                     mode = 0;
 445         char                    buf[32];
 446
 447         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 448                 return -EFAULT;
 449
 450         if (dwc->dr_mode != USB_DR_MODE_OTG)
 451                 return count;
 452
 453         if (!strncmp(buf, "host", 4))
 454                 mode = DWC3_GCTL_PRTCAP_HOST;
 455
 456         if (!strncmp(buf, "device", 6))
 457                 mode = DWC3_GCTL_PRTCAP_DEVICE;
 458
 459         if (!strncmp(buf, "otg", 3))
 460                 mode = DWC3_GCTL_PRTCAP_OTG;
 461
 462         dwc3_set_mode(dwc, mode);
 463
 464         return count;
 465 }
 466
 467 static const struct file_operations dwc3_mode_fops = {
 468         .open                   = dwc3_mode_open,
 469         .write                  = dwc3_mode_write,
 470         .read                   = seq_read,
 471         .llseek                 = seq_lseek,
 472         .release                = single_release,
 473 };
 474
 475 static int dwc3_testmode_show(struct seq_file *s, void *unused)
 476 {
 477         struct dwc3             *dwc = s->private;
 478         unsigned long           flags;
 479         u32                     reg;
 480         int                     ret;
 481
 482         ret = pm_runtime_resume_and_get(dwc->dev);
 483         if (ret < 0)
 484                 return ret;
 485
 486         spin_lock_irqsave(&dwc->lock, flags);
 487         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 488         reg &= DWC3_DCTL_TSTCTRL_MASK;
 489         reg >>= 1;
 490         spin_unlock_irqrestore(&dwc->lock, flags);
 491
 492         switch (reg) {
 493         case 0:
 494                 seq_puts(s, "no test\n");
 495                 break;
 496         case USB_TEST_J:
 497                 seq_puts(s, "test_j\n");
 498                 break;
 499         case USB_TEST_K:
 500                 seq_puts(s, "test_k\n");
 501                 break;
 502         case USB_TEST_SE0_NAK:
 503                 seq_puts(s, "test_se0_nak\n");
 504                 break;
 505         case USB_TEST_PACKET:
 506                 seq_puts(s, "test_packet\n");
 507                 break;
 508         case USB_TEST_FORCE_ENABLE:
 509                 seq_puts(s, "test_force_enable\n");
 510                 break;
 511         default:
 512                 seq_printf(s, "UNKNOWN %d\n", reg);
 513         }
 514
 515         pm_runtime_put_sync(dwc->dev);
 516
 517         return 0;
 518 }
 519
 520 static int dwc3_testmode_open(struct inode *inode, struct file *file)
 521 {
 522         return single_open(file, dwc3_testmode_show, inode->i_private);
 523 }
 524
 525 static ssize_t dwc3_testmode_write(struct file *file,
 526                 const char __user *ubuf, size_t count, loff_t *ppos)
 527 {
 528         struct seq_file         *s = file->private_data;
 529         struct dwc3             *dwc = s->private;
 530         unsigned long           flags;
 531         u32                     testmode = 0;
 532         char                    buf[32];
 533         int                     ret;
 534
 535         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 536                 return -EFAULT;
 537
 538         if (!strncmp(buf, "test_j", 6))
 539                 testmode = USB_TEST_J;
 540         else if (!strncmp(buf, "test_k", 6))
 541                 testmode = USB_TEST_K;
 542         else if (!strncmp(buf, "test_se0_nak", 12))
 543                 testmode = USB_TEST_SE0_NAK;
 544         else if (!strncmp(buf, "test_packet", 11))
 545                 testmode = USB_TEST_PACKET;
 546         else if (!strncmp(buf, "test_force_enable", 17))
 547                 testmode = USB_TEST_FORCE_ENABLE;
 548         else
 549                 testmode = 0;
 550
 551         ret = pm_runtime_resume_and_get(dwc->dev);
 552         if (ret < 0)
 553                 return ret;
 554
 555         spin_lock_irqsave(&dwc->lock, flags);
 556         dwc3_gadget_set_test_mode(dwc, testmode);
 557         spin_unlock_irqrestore(&dwc->lock, flags);
 558
 559         pm_runtime_put_sync(dwc->dev);
 560
 561         return count;
 562 }
 563
 564 static const struct file_operations dwc3_testmode_fops = {
 565         .open                   = dwc3_testmode_open,
 566         .write                  = dwc3_testmode_write,
 567         .read                   = seq_read,
 568         .llseek                 = seq_lseek,
 569         .release                = single_release,
 570 };
 571
 572 static int dwc3_link_state_show(struct seq_file *s, void *unused)
 573 {
 574         struct dwc3             *dwc = s->private;
 575         unsigned long           flags;
 576         enum dwc3_link_state    state;
 577         u32                     reg;
 578         u8                      speed;
 579         int                     ret;
 580
 581         ret = pm_runtime_resume_and_get(dwc->dev);
 582         if (ret < 0)
 583                 return ret;
 584
 585         spin_lock_irqsave(&dwc->lock, flags);
 586         reg = dwc3_readl(dwc->regs, DWC3_GSTS);
 587         if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
 588                 seq_puts(s, "Not available\n");
 589                 spin_unlock_irqrestore(&dwc->lock, flags);
 590                 pm_runtime_put_sync(dwc->dev);
 591                 return 0;
 592         }
 593
 594         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 595         state = DWC3_DSTS_USBLNKST(reg);
 596         speed = reg & DWC3_DSTS_CONNECTSPD;
 597
 598         seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
 599                    dwc3_gadget_link_string(state) :
 600                    dwc3_gadget_hs_link_string(state));
 601         spin_unlock_irqrestore(&dwc->lock, flags);
 602
 603         pm_runtime_put_sync(dwc->dev);
 604
 605         return 0;
 606 }
 607
 608 static int dwc3_link_state_open(struct inode *inode, struct file *file)
 609 {
 610         return single_open(file, dwc3_link_state_show, inode->i_private);
 611 }
 612
 613 static ssize_t dwc3_link_state_write(struct file *file,
 614                 const char __user *ubuf, size_t count, loff_t *ppos)
 615 {
 616         struct seq_file         *s = file->private_data;
 617         struct dwc3             *dwc = s->private;
 618         unsigned long           flags;
 619         enum dwc3_link_state    state = 0;
 620         char                    buf[32];
 621         u32                     reg;
 622         u8                      speed;
 623         int                     ret;
 624
 625         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 626                 return -EFAULT;
 627
 628         if (!strncmp(buf, "SS.Disabled", 11))
 629                 state = DWC3_LINK_STATE_SS_DIS;
 630         else if (!strncmp(buf, "Rx.Detect", 9))
 631                 state = DWC3_LINK_STATE_RX_DET;
 632         else if (!strncmp(buf, "SS.Inactive", 11))
 633                 state = DWC3_LINK_STATE_SS_INACT;
 634         else if (!strncmp(buf, "Recovery", 8))
 635                 state = DWC3_LINK_STATE_RECOV;
 636         else if (!strncmp(buf, "Compliance", 10))
 637                 state = DWC3_LINK_STATE_CMPLY;
 638         else if (!strncmp(buf, "Loopback", 8))
 639                 state = DWC3_LINK_STATE_LPBK;
 640         else
 641                 return -EINVAL;
 642
 643         ret = pm_runtime_resume_and_get(dwc->dev);
 644         if (ret < 0)
 645                 return ret;
 646
 647         spin_lock_irqsave(&dwc->lock, flags);
 648         reg = dwc3_readl(dwc->regs, DWC3_GSTS);
 649         if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
 650                 spin_unlock_irqrestore(&dwc->lock, flags);
 651                 pm_runtime_put_sync(dwc->dev);
 652                 return -EINVAL;
 653         }
 654
 655         reg = dwc3_readl(dwc->regs, DWC3_DSTS);
 656         speed = reg & DWC3_DSTS_CONNECTSPD;
 657
 658         if (speed < DWC3_DSTS_SUPERSPEED &&
 659             state != DWC3_LINK_STATE_RECOV) {
 660                 spin_unlock_irqrestore(&dwc->lock, flags);
 661                 pm_runtime_put_sync(dwc->dev);
 662                 return -EINVAL;
 663         }
 664
 665         dwc3_gadget_set_link_state(dwc, state);
 666         spin_unlock_irqrestore(&dwc->lock, flags);
 667
 668         pm_runtime_put_sync(dwc->dev);
 669
 670         return count;
 671 }
 672
 673 static const struct file_operations dwc3_link_state_fops = {
 674         .open                   = dwc3_link_state_open,
 675         .write                  = dwc3_link_state_write,
 676         .read                   = seq_read,
 677         .llseek                 = seq_lseek,
 678         .release                = single_release,
 679 };
 680
 681 struct dwc3_ep_file_map {
 682         const char name[25];
 683         const struct file_operations *const fops;
 684 };
 685
 686 static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused)
 687 {
 688         struct dwc3_ep          *dep = s->private;
 689         struct dwc3             *dwc = dep->dwc;
 690         unsigned long           flags;
 691         u32                     mdwidth;
 692         u32                     val;
 693         int                     ret;
 694
 695         ret = pm_runtime_resume_and_get(dwc->dev);
 696         if (ret < 0)
 697                 return ret;
 698
 699         spin_lock_irqsave(&dwc->lock, flags);
 700         val = dwc3_core_fifo_space(dep, DWC3_TXFIFO);
 701
 702         /* Convert to bytes */
 703         mdwidth = dwc3_mdwidth(dwc);
 704
 705         val *= mdwidth;
 706         val >>= 3;
 707         seq_printf(s, "%u\n", val);
 708         spin_unlock_irqrestore(&dwc->lock, flags);
 709
 710         pm_runtime_put_sync(dwc->dev);
 711
 712         return 0;
 713 }
 714
 715 static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused)
 716 {
 717         struct dwc3_ep          *dep = s->private;
 718         struct dwc3             *dwc = dep->dwc;
 719         unsigned long           flags;
 720         u32                     mdwidth;
 721         u32                     val;
 722         int                     ret;
 723
 724         ret = pm_runtime_resume_and_get(dwc->dev);
 725         if (ret < 0)
 726                 return ret;
 727
 728         spin_lock_irqsave(&dwc->lock, flags);
 729         val = dwc3_core_fifo_space(dep, DWC3_RXFIFO);
 730
 731         /* Convert to bytes */
 732         mdwidth = dwc3_mdwidth(dwc);
 733
 734         val *= mdwidth;
 735         val >>= 3;
 736         seq_printf(s, "%u\n", val);
 737         spin_unlock_irqrestore(&dwc->lock, flags);
 738
 739         pm_runtime_put_sync(dwc->dev);
 740
 741         return 0;
 742 }
 743
 744 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
 745 {
 746         struct dwc3_ep          *dep = s->private;
 747         struct dwc3             *dwc = dep->dwc;
 748         unsigned long           flags;
 749         u32                     val;
 750         int                     ret;
 751
 752         ret = pm_runtime_resume_and_get(dwc->dev);
 753         if (ret < 0)
 754                 return ret;
 755
 756         spin_lock_irqsave(&dwc->lock, flags);
 757         val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
 758         seq_printf(s, "%u\n", val);
 759         spin_unlock_irqrestore(&dwc->lock, flags);
 760
 761         pm_runtime_put_sync(dwc->dev);
 762
 763         return 0;
 764 }
 765
 766 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
 767 {
 768         struct dwc3_ep          *dep = s->private;
 769         struct dwc3             *dwc = dep->dwc;
 770         unsigned long           flags;
 771         u32                     val;
 772         int                     ret;
 773
 774         ret = pm_runtime_resume_and_get(dwc->dev);
 775         if (ret < 0)
 776                 return ret;
 777
 778         spin_lock_irqsave(&dwc->lock, flags);
 779         val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
 780         seq_printf(s, "%u\n", val);
 781         spin_unlock_irqrestore(&dwc->lock, flags);
 782
 783         pm_runtime_put_sync(dwc->dev);
 784
 785         return 0;
 786 }
 787
 788 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
 789 {
 790         struct dwc3_ep          *dep = s->private;
 791         struct dwc3             *dwc = dep->dwc;
 792         unsigned long           flags;
 793         u32                     val;
 794         int                     ret;
 795
 796         ret = pm_runtime_resume_and_get(dwc->dev);
 797         if (ret < 0)
 798                 return ret;
 799
 800         spin_lock_irqsave(&dwc->lock, flags);
 801         val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
 802         seq_printf(s, "%u\n", val);
 803         spin_unlock_irqrestore(&dwc->lock, flags);
 804
 805         pm_runtime_put_sync(dwc->dev);
 806
 807         return 0;
 808 }
 809
 810 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
 811 {
 812         struct dwc3_ep          *dep = s->private;
 813         struct dwc3             *dwc = dep->dwc;
 814         unsigned long           flags;
 815         u32                     val;
 816         int                     ret;
 817
 818         ret = pm_runtime_resume_and_get(dwc->dev);
 819         if (ret < 0)
 820                 return ret;
 821
 822         spin_lock_irqsave(&dwc->lock, flags);
 823         val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
 824         seq_printf(s, "%u\n", val);
 825         spin_unlock_irqrestore(&dwc->lock, flags);
 826
 827         pm_runtime_put_sync(dwc->dev);
 828
 829         return 0;
 830 }
 831
 832 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
 833 {
 834         struct dwc3_ep          *dep = s->private;
 835         struct dwc3             *dwc = dep->dwc;
 836         unsigned long           flags;
 837         u32                     val;
 838         int                     ret;
 839
 840         ret = pm_runtime_resume_and_get(dwc->dev);
 841         if (ret < 0)
 842                 return ret;
 843
 844         spin_lock_irqsave(&dwc->lock, flags);
 845         val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
 846         seq_printf(s, "%u\n", val);
 847         spin_unlock_irqrestore(&dwc->lock, flags);
 848
 849         pm_runtime_put_sync(dwc->dev);
 850
 851         return 0;
 852 }
 853
 854 static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
 855 {
 856         struct dwc3_ep          *dep = s->private;
 857         struct dwc3             *dwc = dep->dwc;
 858         unsigned long           flags;
 859
 860         spin_lock_irqsave(&dwc->lock, flags);
 861         if (!(dep->flags & DWC3_EP_ENABLED) || !dep->endpoint.desc) {
 862                 seq_puts(s, "--\n");
 863                 goto out;
 864         }
 865
 866         switch (usb_endpoint_type(dep->endpoint.desc)) {
 867         case USB_ENDPOINT_XFER_CONTROL:
 868                 seq_puts(s, "control\n");
 869                 break;
 870         case USB_ENDPOINT_XFER_ISOC:
 871                 seq_puts(s, "isochronous\n");
 872                 break;
 873         case USB_ENDPOINT_XFER_BULK:
 874                 seq_puts(s, "bulk\n");
 875                 break;
 876         case USB_ENDPOINT_XFER_INT:
 877                 seq_puts(s, "interrupt\n");
 878                 break;
 879         default:
 880                 seq_puts(s, "--\n");
 881         }
 882
 883 out:
 884         spin_unlock_irqrestore(&dwc->lock, flags);
 885
 886         return 0;
 887 }
 888
 889 static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
 890 {
 891         struct dwc3_ep          *dep = s->private;
 892         struct dwc3             *dwc = dep->dwc;
 893         unsigned long           flags;
 894         int                     i;
 895         int                     ret;
 896
 897         ret = pm_runtime_resume_and_get(dwc->dev);
 898         if (ret < 0)
 899                 return ret;
 900
 901         spin_lock_irqsave(&dwc->lock, flags);
 902         if (dep->number <= 1) {
 903                 seq_puts(s, "--\n");
 904                 goto out;
 905         }
 906
 907         seq_puts(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
 908
 909         for (i = 0; i < DWC3_TRB_NUM; i++) {
 910                 struct dwc3_trb *trb = &dep->trb_pool[i];
 911                 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
 912
 913                 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d       %c%c\n",
 914                                 trb->bph, trb->bpl, trb->size,
 915                                 dwc3_trb_type_string(type),
 916                                 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
 917                                 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
 918                                 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
 919                                 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
 920                                 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
 921                                 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
 922                                 dep->trb_enqueue == i ? 'E' : ' ',
 923                                 dep->trb_dequeue == i ? 'D' : ' ');
 924         }
 925
 926 out:
 927         spin_unlock_irqrestore(&dwc->lock, flags);
 928
 929         pm_runtime_put_sync(dwc->dev);
 930
 931         return 0;
 932 }
 933
 934 static int dwc3_ep_info_register_show(struct seq_file *s, void *unused)
 935 {
 936         struct dwc3_ep          *dep = s->private;
 937         struct dwc3             *dwc = dep->dwc;
 938         unsigned long           flags;
 939         u64                     ep_info;
 940         u32                     lower_32_bits;
 941         u32                     upper_32_bits;
 942         u32                     reg;
 943         int                     ret;
 944
 945         ret = pm_runtime_resume_and_get(dwc->dev);
 946         if (ret < 0)
 947                 return ret;
 948
 949         spin_lock_irqsave(&dwc->lock, flags);
 950         reg = DWC3_GDBGLSPMUX_EPSELECT(dep->number);
 951         dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
 952
 953         lower_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO0);
 954         upper_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO1);
 955
 956         ep_info = ((u64)upper_32_bits << 32) | lower_32_bits;
 957         seq_printf(s, "0x%016llx\n", ep_info);
 958         spin_unlock_irqrestore(&dwc->lock, flags);
 959
 960         pm_runtime_put_sync(dwc->dev);
 961
 962         return 0;
 963 }
 964
 965 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_size);
 966 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_size);
 967 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
 968 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
 969 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
 970 DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
 971 DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
 972 DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
 973 DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
 974 DEFINE_SHOW_ATTRIBUTE(dwc3_ep_info_register);
 975
 976 static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
 977         { "tx_fifo_size", &dwc3_tx_fifo_size_fops, },
 978         { "rx_fifo_size", &dwc3_rx_fifo_size_fops, },
 979         { "tx_request_queue", &dwc3_tx_request_queue_fops, },
 980         { "rx_request_queue", &dwc3_rx_request_queue_fops, },
 981         { "rx_info_queue", &dwc3_rx_info_queue_fops, },
 982         { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
 983         { "event_queue", &dwc3_event_queue_fops, },
 984         { "transfer_type", &dwc3_transfer_type_fops, },
 985         { "trb_ring", &dwc3_trb_ring_fops, },
 986         { "GDBGEPINFO", &dwc3_ep_info_register_fops, },
 987 };
 988
 989 void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
 990 {
 991         struct dentry           *dir;
 992         int                     i;
 993
 994         dir = debugfs_create_dir(dep->name, dep->dwc->debug_root);
 995         for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
 996                 const struct file_operations *fops = dwc3_ep_file_map[i].fops;
 997                 const char *name = dwc3_ep_file_map[i].name;
 998
 999                 debugfs_create_file(name, 0444, dir, dep, fops);
1000         }
1001 }
1002
1003 void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep)
1004 {
1005         debugfs_lookup_and_remove(dep->name, dep->dwc->debug_root);
1006 }
1007
1008 void dwc3_debugfs_init(struct dwc3 *dwc)
1009 {
1010         struct dentry           *root;
1011
1012         dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
1013         if (!dwc->regset)
1014                 return;
1015
1016         dwc->dbg_lsp_select = DWC3_LSP_MUX_UNSELECTED;
1017
1018         dwc->regset->regs = dwc3_regs;
1019         dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
1020         dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
1021         dwc->regset->dev = dwc->dev;
1022
1023         root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root);
1024         dwc->debug_root = root;
1025         debugfs_create_regset32("regdump", 0444, root, dwc->regset);
1026         debugfs_create_file("lsp_dump", 0644, root, dwc, &dwc3_lsp_fops);
1027
1028         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE))
1029                 debugfs_create_file("mode", 0644, root, dwc,
1030                                     &dwc3_mode_fops);
1031
1032         if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
1033                         IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
1034                 debugfs_create_file("testmode", 0644, root, dwc,
1035                                 &dwc3_testmode_fops);
1036                 debugfs_create_file("link_state", 0644, root, dwc,
1037                                     &dwc3_link_state_fops);
1038         }
1039 }
1040
1041 void dwc3_debugfs_exit(struct dwc3 *dwc)
1042 {
1043         debugfs_lookup_and_remove(dev_name(dwc->dev), usb_debug_root);
1044         kfree(dwc->regset);
1045 }