drivers/usb/dwc2/debugfs.c

   1 /**
   2  * debugfs.c - Designware USB2 DRD controller debugfs
   3  *
   4  * Copyright (C) 2015 Intel Corporation
   5  * Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2  of
   9  * the License as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/spinlock.h>
  18 #include <linux/debugfs.h>
  19 #include <linux/seq_file.h>
  20 #include <linux/uaccess.h>
  21
  22 #include "core.h"
  23 #include "debug.h"
  24
  25 #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
  26         IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
  27 /**
  28  * testmode_write - debugfs: change usb test mode
  29  * @seq: The seq file to write to.
  30  * @v: Unused parameter.
  31  *
  32  * This debugfs entry modify the current usb test mode.
  33  */
  34 static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t
  35                 count, loff_t *ppos)
  36 {
  37         struct seq_file         *s = file->private_data;
  38         struct dwc2_hsotg       *hsotg = s->private;
  39         unsigned long           flags;
  40         u32                     testmode = 0;
  41         char                    buf[32];
  42
  43         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  44                 return -EFAULT;
  45
  46         if (!strncmp(buf, "test_j", 6))
  47                 testmode = TEST_J;
  48         else if (!strncmp(buf, "test_k", 6))
  49                 testmode = TEST_K;
  50         else if (!strncmp(buf, "test_se0_nak", 12))
  51                 testmode = TEST_SE0_NAK;
  52         else if (!strncmp(buf, "test_packet", 11))
  53                 testmode = TEST_PACKET;
  54         else if (!strncmp(buf, "test_force_enable", 17))
  55                 testmode = TEST_FORCE_EN;
  56         else
  57                 testmode = 0;
  58
  59         spin_lock_irqsave(&hsotg->lock, flags);
  60         dwc2_hsotg_set_test_mode(hsotg, testmode);
  61         spin_unlock_irqrestore(&hsotg->lock, flags);
  62         return count;
  63 }
  64
  65 /**
  66  * testmode_show - debugfs: show usb test mode state
  67  * @seq: The seq file to write to.
  68  * @v: Unused parameter.
  69  *
  70  * This debugfs entry shows which usb test mode is currently enabled.
  71  */
  72 static int testmode_show(struct seq_file *s, void *unused)
  73 {
  74         struct dwc2_hsotg *hsotg = s->private;
  75         unsigned long flags;
  76         int dctl;
  77
  78         spin_lock_irqsave(&hsotg->lock, flags);
  79         dctl = dwc2_readl(hsotg->regs + DCTL);
  80         dctl &= DCTL_TSTCTL_MASK;
  81         dctl >>= DCTL_TSTCTL_SHIFT;
  82         spin_unlock_irqrestore(&hsotg->lock, flags);
  83
  84         switch (dctl) {
  85         case 0:
  86                 seq_puts(s, "no test\n");
  87                 break;
  88         case TEST_J:
  89                 seq_puts(s, "test_j\n");
  90                 break;
  91         case TEST_K:
  92                 seq_puts(s, "test_k\n");
  93                 break;
  94         case TEST_SE0_NAK:
  95                 seq_puts(s, "test_se0_nak\n");
  96                 break;
  97         case TEST_PACKET:
  98                 seq_puts(s, "test_packet\n");
  99                 break;
 100         case TEST_FORCE_EN:
 101                 seq_puts(s, "test_force_enable\n");
 102                 break;
 103         default:
 104                 seq_printf(s, "UNKNOWN %d\n", dctl);
 105         }
 106
 107         return 0;
 108 }
 109
 110 static int testmode_open(struct inode *inode, struct file *file)
 111 {
 112         return single_open(file, testmode_show, inode->i_private);
 113 }
 114
 115 static const struct file_operations testmode_fops = {
 116         .owner          = THIS_MODULE,
 117         .open           = testmode_open,
 118         .write          = testmode_write,
 119         .read           = seq_read,
 120         .llseek         = seq_lseek,
 121         .release        = single_release,
 122 };
 123
 124 /**
 125  * state_show - debugfs: show overall driver and device state.
 126  * @seq: The seq file to write to.
 127  * @v: Unused parameter.
 128  *
 129  * This debugfs entry shows the overall state of the hardware and
 130  * some general information about each of the endpoints available
 131  * to the system.
 132  */
 133 static int state_show(struct seq_file *seq, void *v)
 134 {
 135         struct dwc2_hsotg *hsotg = seq->private;
 136         void __iomem *regs = hsotg->regs;
 137         int idx;
 138
 139         seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
 140                  dwc2_readl(regs + DCFG),
 141                  dwc2_readl(regs + DCTL),
 142                  dwc2_readl(regs + DSTS));
 143
 144         seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n",
 145                    dwc2_readl(regs + DIEPMSK), dwc2_readl(regs + DOEPMSK));
 146
 147         seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n",
 148                    dwc2_readl(regs + GINTMSK),
 149                    dwc2_readl(regs + GINTSTS));
 150
 151         seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n",
 152                    dwc2_readl(regs + DAINTMSK),
 153                    dwc2_readl(regs + DAINT));
 154
 155         seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n",
 156                    dwc2_readl(regs + GNPTXSTS),
 157                    dwc2_readl(regs + GRXSTSR));
 158
 159         seq_puts(seq, "\nEndpoint status:\n");
 160
 161         for (idx = 0; idx < hsotg->num_of_eps; idx++) {
 162                 u32 in, out;
 163
 164                 in = dwc2_readl(regs + DIEPCTL(idx));
 165                 out = dwc2_readl(regs + DOEPCTL(idx));
 166
 167                 seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x",
 168                            idx, in, out);
 169
 170                 in = dwc2_readl(regs + DIEPTSIZ(idx));
 171                 out = dwc2_readl(regs + DOEPTSIZ(idx));
 172
 173                 seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x",
 174                            in, out);
 175
 176                 seq_puts(seq, "\n");
 177         }
 178
 179         return 0;
 180 }
 181
 182 static int state_open(struct inode *inode, struct file *file)
 183 {
 184         return single_open(file, state_show, inode->i_private);
 185 }
 186
 187 static const struct file_operations state_fops = {
 188         .owner          = THIS_MODULE,
 189         .open           = state_open,
 190         .read           = seq_read,
 191         .llseek         = seq_lseek,
 192         .release        = single_release,
 193 };
 194
 195 /**
 196  * fifo_show - debugfs: show the fifo information
 197  * @seq: The seq_file to write data to.
 198  * @v: Unused parameter.
 199  *
 200  * Show the FIFO information for the overall fifo and all the
 201  * periodic transmission FIFOs.
 202  */
 203 static int fifo_show(struct seq_file *seq, void *v)
 204 {
 205         struct dwc2_hsotg *hsotg = seq->private;
 206         void __iomem *regs = hsotg->regs;
 207         u32 val;
 208         int idx;
 209
 210         seq_puts(seq, "Non-periodic FIFOs:\n");
 211         seq_printf(seq, "RXFIFO: Size %d\n", dwc2_readl(regs + GRXFSIZ));
 212
 213         val = dwc2_readl(regs + GNPTXFSIZ);
 214         seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n",
 215                    val >> FIFOSIZE_DEPTH_SHIFT,
 216                    val & FIFOSIZE_DEPTH_MASK);
 217
 218         seq_puts(seq, "\nPeriodic TXFIFOs:\n");
 219
 220         for (idx = 1; idx < hsotg->num_of_eps; idx++) {
 221                 val = dwc2_readl(regs + DPTXFSIZN(idx));
 222
 223                 seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
 224                            val >> FIFOSIZE_DEPTH_SHIFT,
 225                            val & FIFOSIZE_STARTADDR_MASK);
 226         }
 227
 228         return 0;
 229 }
 230
 231 static int fifo_open(struct inode *inode, struct file *file)
 232 {
 233         return single_open(file, fifo_show, inode->i_private);
 234 }
 235
 236 static const struct file_operations fifo_fops = {
 237         .owner          = THIS_MODULE,
 238         .open           = fifo_open,
 239         .read           = seq_read,
 240         .llseek         = seq_lseek,
 241         .release        = single_release,
 242 };
 243
 244 static const char *decode_direction(int is_in)
 245 {
 246         return is_in ? "in" : "out";
 247 }
 248
 249 /**
 250  * ep_show - debugfs: show the state of an endpoint.
 251  * @seq: The seq_file to write data to.
 252  * @v: Unused parameter.
 253  *
 254  * This debugfs entry shows the state of the given endpoint (one is
 255  * registered for each available).
 256  */
 257 static int ep_show(struct seq_file *seq, void *v)
 258 {
 259         struct dwc2_hsotg_ep *ep = seq->private;
 260         struct dwc2_hsotg *hsotg = ep->parent;
 261         struct dwc2_hsotg_req *req;
 262         void __iomem *regs = hsotg->regs;
 263         int index = ep->index;
 264         int show_limit = 15;
 265         unsigned long flags;
 266
 267         seq_printf(seq, "Endpoint index %d, named %s,  dir %s:\n",
 268                    ep->index, ep->ep.name, decode_direction(ep->dir_in));
 269
 270         /* first show the register state */
 271
 272         seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n",
 273                    dwc2_readl(regs + DIEPCTL(index)),
 274                    dwc2_readl(regs + DOEPCTL(index)));
 275
 276         seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n",
 277                    dwc2_readl(regs + DIEPDMA(index)),
 278                    dwc2_readl(regs + DOEPDMA(index)));
 279
 280         seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n",
 281                    dwc2_readl(regs + DIEPINT(index)),
 282                    dwc2_readl(regs + DOEPINT(index)));
 283
 284         seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n",
 285                    dwc2_readl(regs + DIEPTSIZ(index)),
 286                    dwc2_readl(regs + DOEPTSIZ(index)));
 287
 288         seq_puts(seq, "\n");
 289         seq_printf(seq, "mps %d\n", ep->ep.maxpacket);
 290         seq_printf(seq, "total_data=%ld\n", ep->total_data);
 291
 292         seq_printf(seq, "request list (%p,%p):\n",
 293                    ep->queue.next, ep->queue.prev);
 294
 295         spin_lock_irqsave(&hsotg->lock, flags);
 296
 297         list_for_each_entry(req, &ep->queue, queue) {
 298                 if (--show_limit < 0) {
 299                         seq_puts(seq, "not showing more requests...\n");
 300                         break;
 301                 }
 302
 303                 seq_printf(seq, "%c req %p: %d bytes @%p, ",
 304                            req == ep->req ? '*' : ' ',
 305                            req, req->req.length, req->req.buf);
 306                 seq_printf(seq, "%d done, res %d\n",
 307                            req->req.actual, req->req.status);
 308         }
 309
 310         spin_unlock_irqrestore(&hsotg->lock, flags);
 311
 312         return 0;
 313 }
 314
 315 static int ep_open(struct inode *inode, struct file *file)
 316 {
 317         return single_open(file, ep_show, inode->i_private);
 318 }
 319
 320 static const struct file_operations ep_fops = {
 321         .owner          = THIS_MODULE,
 322         .open           = ep_open,
 323         .read           = seq_read,
 324         .llseek         = seq_lseek,
 325         .release        = single_release,
 326 };
 327
 328 /**
 329  * dwc2_hsotg_create_debug - create debugfs directory and files
 330  * @hsotg: The driver state
 331  *
 332  * Create the debugfs files to allow the user to get information
 333  * about the state of the system. The directory name is created
 334  * with the same name as the device itself, in case we end up
 335  * with multiple blocks in future systems.
 336  */
 337 static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg)
 338 {
 339         struct dentry *root;
 340         struct dentry *file;
 341         unsigned epidx;
 342
 343         root = hsotg->debug_root;
 344
 345         /* create general state file */
 346
 347         file = debugfs_create_file("state", S_IRUGO, root, hsotg, &state_fops);
 348         if (IS_ERR(file))
 349                 dev_err(hsotg->dev, "%s: failed to create state\n", __func__);
 350
 351         file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, hsotg,
 352                                                         &testmode_fops);
 353         if (IS_ERR(file))
 354                 dev_err(hsotg->dev, "%s: failed to create testmode\n",
 355                                 __func__);
 356
 357         file = debugfs_create_file("fifo", S_IRUGO, root, hsotg, &fifo_fops);
 358         if (IS_ERR(file))
 359                 dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__);
 360
 361         /* Create one file for each out endpoint */
 362         for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
 363                 struct dwc2_hsotg_ep *ep;
 364
 365                 ep = hsotg->eps_out[epidx];
 366                 if (ep) {
 367                         file = debugfs_create_file(ep->name, S_IRUGO,
 368                                                           root, ep, &ep_fops);
 369                         if (IS_ERR(file))
 370                                 dev_err(hsotg->dev, "failed to create %s debug file\n",
 371                                         ep->name);
 372                 }
 373         }
 374         /* Create one file for each in endpoint. EP0 is handled with out eps */
 375         for (epidx = 1; epidx < hsotg->num_of_eps; epidx++) {
 376                 struct dwc2_hsotg_ep *ep;
 377
 378                 ep = hsotg->eps_in[epidx];
 379                 if (ep) {
 380                         file = debugfs_create_file(ep->name, S_IRUGO,
 381                                                           root, ep, &ep_fops);
 382                         if (IS_ERR(file))
 383                                 dev_err(hsotg->dev, "failed to create %s debug file\n",
 384                                         ep->name);
 385                 }
 386         }
 387 }
 388 #else
 389 static inline void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg) {}
 390 #endif
 391
 392 /* dwc2_hsotg_delete_debug is removed as cleanup in done in dwc2_debugfs_exit */
 393
 394 #define dump_register(nm)       \
 395 {                               \
 396         .name   = #nm,          \
 397         .offset = nm,           \
 398 }
 399
 400 static const struct debugfs_reg32 dwc2_regs[] = {
 401         /*
 402          * Accessing registers like this can trigger mode mismatch interrupt.
 403          * However, according to dwc2 databook, the register access, in this
 404          * case, is completed on the processor bus but is ignored by the core
 405          * and does not affect its operation.
 406          */
 407         dump_register(GOTGCTL),
 408         dump_register(GOTGINT),
 409         dump_register(GAHBCFG),
 410         dump_register(GUSBCFG),
 411         dump_register(GRSTCTL),
 412         dump_register(GINTSTS),
 413         dump_register(GINTMSK),
 414         dump_register(GRXSTSR),
 415         dump_register(GRXSTSP),
 416         dump_register(GRXFSIZ),
 417         dump_register(GNPTXFSIZ),
 418         dump_register(GNPTXSTS),
 419         dump_register(GI2CCTL),
 420         dump_register(GPVNDCTL),
 421         dump_register(GGPIO),
 422         dump_register(GUID),
 423         dump_register(GSNPSID),
 424         dump_register(GHWCFG1),
 425         dump_register(GHWCFG2),
 426         dump_register(GHWCFG3),
 427         dump_register(GHWCFG4),
 428         dump_register(GLPMCFG),
 429         dump_register(GPWRDN),
 430         dump_register(GDFIFOCFG),
 431         dump_register(ADPCTL),
 432         dump_register(HPTXFSIZ),
 433         dump_register(DPTXFSIZN(1)),
 434         dump_register(DPTXFSIZN(2)),
 435         dump_register(DPTXFSIZN(3)),
 436         dump_register(DPTXFSIZN(4)),
 437         dump_register(DPTXFSIZN(5)),
 438         dump_register(DPTXFSIZN(6)),
 439         dump_register(DPTXFSIZN(7)),
 440         dump_register(DPTXFSIZN(8)),
 441         dump_register(DPTXFSIZN(9)),
 442         dump_register(DPTXFSIZN(10)),
 443         dump_register(DPTXFSIZN(11)),
 444         dump_register(DPTXFSIZN(12)),
 445         dump_register(DPTXFSIZN(13)),
 446         dump_register(DPTXFSIZN(14)),
 447         dump_register(DPTXFSIZN(15)),
 448         dump_register(DCFG),
 449         dump_register(DCTL),
 450         dump_register(DSTS),
 451         dump_register(DIEPMSK),
 452         dump_register(DOEPMSK),
 453         dump_register(DAINT),
 454         dump_register(DAINTMSK),
 455         dump_register(DTKNQR1),
 456         dump_register(DTKNQR2),
 457         dump_register(DTKNQR3),
 458         dump_register(DTKNQR4),
 459         dump_register(DVBUSDIS),
 460         dump_register(DVBUSPULSE),
 461         dump_register(DIEPCTL(0)),
 462         dump_register(DIEPCTL(1)),
 463         dump_register(DIEPCTL(2)),
 464         dump_register(DIEPCTL(3)),
 465         dump_register(DIEPCTL(4)),
 466         dump_register(DIEPCTL(5)),
 467         dump_register(DIEPCTL(6)),
 468         dump_register(DIEPCTL(7)),
 469         dump_register(DIEPCTL(8)),
 470         dump_register(DIEPCTL(9)),
 471         dump_register(DIEPCTL(10)),
 472         dump_register(DIEPCTL(11)),
 473         dump_register(DIEPCTL(12)),
 474         dump_register(DIEPCTL(13)),
 475         dump_register(DIEPCTL(14)),
 476         dump_register(DIEPCTL(15)),
 477         dump_register(DOEPCTL(0)),
 478         dump_register(DOEPCTL(1)),
 479         dump_register(DOEPCTL(2)),
 480         dump_register(DOEPCTL(3)),
 481         dump_register(DOEPCTL(4)),
 482         dump_register(DOEPCTL(5)),
 483         dump_register(DOEPCTL(6)),
 484         dump_register(DOEPCTL(7)),
 485         dump_register(DOEPCTL(8)),
 486         dump_register(DOEPCTL(9)),
 487         dump_register(DOEPCTL(10)),
 488         dump_register(DOEPCTL(11)),
 489         dump_register(DOEPCTL(12)),
 490         dump_register(DOEPCTL(13)),
 491         dump_register(DOEPCTL(14)),
 492         dump_register(DOEPCTL(15)),
 493         dump_register(DIEPINT(0)),
 494         dump_register(DIEPINT(1)),
 495         dump_register(DIEPINT(2)),
 496         dump_register(DIEPINT(3)),
 497         dump_register(DIEPINT(4)),
 498         dump_register(DIEPINT(5)),
 499         dump_register(DIEPINT(6)),
 500         dump_register(DIEPINT(7)),
 501         dump_register(DIEPINT(8)),
 502         dump_register(DIEPINT(9)),
 503         dump_register(DIEPINT(10)),
 504         dump_register(DIEPINT(11)),
 505         dump_register(DIEPINT(12)),
 506         dump_register(DIEPINT(13)),
 507         dump_register(DIEPINT(14)),
 508         dump_register(DIEPINT(15)),
 509         dump_register(DOEPINT(0)),
 510         dump_register(DOEPINT(1)),
 511         dump_register(DOEPINT(2)),
 512         dump_register(DOEPINT(3)),
 513         dump_register(DOEPINT(4)),
 514         dump_register(DOEPINT(5)),
 515         dump_register(DOEPINT(6)),
 516         dump_register(DOEPINT(7)),
 517         dump_register(DOEPINT(8)),
 518         dump_register(DOEPINT(9)),
 519         dump_register(DOEPINT(10)),
 520         dump_register(DOEPINT(11)),
 521         dump_register(DOEPINT(12)),
 522         dump_register(DOEPINT(13)),
 523         dump_register(DOEPINT(14)),
 524         dump_register(DOEPINT(15)),
 525         dump_register(DIEPTSIZ(0)),
 526         dump_register(DIEPTSIZ(1)),
 527         dump_register(DIEPTSIZ(2)),
 528         dump_register(DIEPTSIZ(3)),
 529         dump_register(DIEPTSIZ(4)),
 530         dump_register(DIEPTSIZ(5)),
 531         dump_register(DIEPTSIZ(6)),
 532         dump_register(DIEPTSIZ(7)),
 533         dump_register(DIEPTSIZ(8)),
 534         dump_register(DIEPTSIZ(9)),
 535         dump_register(DIEPTSIZ(10)),
 536         dump_register(DIEPTSIZ(11)),
 537         dump_register(DIEPTSIZ(12)),
 538         dump_register(DIEPTSIZ(13)),
 539         dump_register(DIEPTSIZ(14)),
 540         dump_register(DIEPTSIZ(15)),
 541         dump_register(DOEPTSIZ(0)),
 542         dump_register(DOEPTSIZ(1)),
 543         dump_register(DOEPTSIZ(2)),
 544         dump_register(DOEPTSIZ(3)),
 545         dump_register(DOEPTSIZ(4)),
 546         dump_register(DOEPTSIZ(5)),
 547         dump_register(DOEPTSIZ(6)),
 548         dump_register(DOEPTSIZ(7)),
 549         dump_register(DOEPTSIZ(8)),
 550         dump_register(DOEPTSIZ(9)),
 551         dump_register(DOEPTSIZ(10)),
 552         dump_register(DOEPTSIZ(11)),
 553         dump_register(DOEPTSIZ(12)),
 554         dump_register(DOEPTSIZ(13)),
 555         dump_register(DOEPTSIZ(14)),
 556         dump_register(DOEPTSIZ(15)),
 557         dump_register(DIEPDMA(0)),
 558         dump_register(DIEPDMA(1)),
 559         dump_register(DIEPDMA(2)),
 560         dump_register(DIEPDMA(3)),
 561         dump_register(DIEPDMA(4)),
 562         dump_register(DIEPDMA(5)),
 563         dump_register(DIEPDMA(6)),
 564         dump_register(DIEPDMA(7)),
 565         dump_register(DIEPDMA(8)),
 566         dump_register(DIEPDMA(9)),
 567         dump_register(DIEPDMA(10)),
 568         dump_register(DIEPDMA(11)),
 569         dump_register(DIEPDMA(12)),
 570         dump_register(DIEPDMA(13)),
 571         dump_register(DIEPDMA(14)),
 572         dump_register(DIEPDMA(15)),
 573         dump_register(DOEPDMA(0)),
 574         dump_register(DOEPDMA(1)),
 575         dump_register(DOEPDMA(2)),
 576         dump_register(DOEPDMA(3)),
 577         dump_register(DOEPDMA(4)),
 578         dump_register(DOEPDMA(5)),
 579         dump_register(DOEPDMA(6)),
 580         dump_register(DOEPDMA(7)),
 581         dump_register(DOEPDMA(8)),
 582         dump_register(DOEPDMA(9)),
 583         dump_register(DOEPDMA(10)),
 584         dump_register(DOEPDMA(11)),
 585         dump_register(DOEPDMA(12)),
 586         dump_register(DOEPDMA(13)),
 587         dump_register(DOEPDMA(14)),
 588         dump_register(DOEPDMA(15)),
 589         dump_register(DTXFSTS(0)),
 590         dump_register(DTXFSTS(1)),
 591         dump_register(DTXFSTS(2)),
 592         dump_register(DTXFSTS(3)),
 593         dump_register(DTXFSTS(4)),
 594         dump_register(DTXFSTS(5)),
 595         dump_register(DTXFSTS(6)),
 596         dump_register(DTXFSTS(7)),
 597         dump_register(DTXFSTS(8)),
 598         dump_register(DTXFSTS(9)),
 599         dump_register(DTXFSTS(10)),
 600         dump_register(DTXFSTS(11)),
 601         dump_register(DTXFSTS(12)),
 602         dump_register(DTXFSTS(13)),
 603         dump_register(DTXFSTS(14)),
 604         dump_register(DTXFSTS(15)),
 605         dump_register(PCGCTL),
 606         dump_register(HCFG),
 607         dump_register(HFIR),
 608         dump_register(HFNUM),
 609         dump_register(HPTXSTS),
 610         dump_register(HAINT),
 611         dump_register(HAINTMSK),
 612         dump_register(HFLBADDR),
 613         dump_register(HPRT0),
 614         dump_register(HCCHAR(0)),
 615         dump_register(HCCHAR(1)),
 616         dump_register(HCCHAR(2)),
 617         dump_register(HCCHAR(3)),
 618         dump_register(HCCHAR(4)),
 619         dump_register(HCCHAR(5)),
 620         dump_register(HCCHAR(6)),
 621         dump_register(HCCHAR(7)),
 622         dump_register(HCCHAR(8)),
 623         dump_register(HCCHAR(9)),
 624         dump_register(HCCHAR(10)),
 625         dump_register(HCCHAR(11)),
 626         dump_register(HCCHAR(12)),
 627         dump_register(HCCHAR(13)),
 628         dump_register(HCCHAR(14)),
 629         dump_register(HCCHAR(15)),
 630         dump_register(HCSPLT(0)),
 631         dump_register(HCSPLT(1)),
 632         dump_register(HCSPLT(2)),
 633         dump_register(HCSPLT(3)),
 634         dump_register(HCSPLT(4)),
 635         dump_register(HCSPLT(5)),
 636         dump_register(HCSPLT(6)),
 637         dump_register(HCSPLT(7)),
 638         dump_register(HCSPLT(8)),
 639         dump_register(HCSPLT(9)),
 640         dump_register(HCSPLT(10)),
 641         dump_register(HCSPLT(11)),
 642         dump_register(HCSPLT(12)),
 643         dump_register(HCSPLT(13)),
 644         dump_register(HCSPLT(14)),
 645         dump_register(HCSPLT(15)),
 646         dump_register(HCINT(0)),
 647         dump_register(HCINT(1)),
 648         dump_register(HCINT(2)),
 649         dump_register(HCINT(3)),
 650         dump_register(HCINT(4)),
 651         dump_register(HCINT(5)),
 652         dump_register(HCINT(6)),
 653         dump_register(HCINT(7)),
 654         dump_register(HCINT(8)),
 655         dump_register(HCINT(9)),
 656         dump_register(HCINT(10)),
 657         dump_register(HCINT(11)),
 658         dump_register(HCINT(12)),
 659         dump_register(HCINT(13)),
 660         dump_register(HCINT(14)),
 661         dump_register(HCINT(15)),
 662         dump_register(HCINTMSK(0)),
 663         dump_register(HCINTMSK(1)),
 664         dump_register(HCINTMSK(2)),
 665         dump_register(HCINTMSK(3)),
 666         dump_register(HCINTMSK(4)),
 667         dump_register(HCINTMSK(5)),
 668         dump_register(HCINTMSK(6)),
 669         dump_register(HCINTMSK(7)),
 670         dump_register(HCINTMSK(8)),
 671         dump_register(HCINTMSK(9)),
 672         dump_register(HCINTMSK(10)),
 673         dump_register(HCINTMSK(11)),
 674         dump_register(HCINTMSK(12)),
 675         dump_register(HCINTMSK(13)),
 676         dump_register(HCINTMSK(14)),
 677         dump_register(HCINTMSK(15)),
 678         dump_register(HCTSIZ(0)),
 679         dump_register(HCTSIZ(1)),
 680         dump_register(HCTSIZ(2)),
 681         dump_register(HCTSIZ(3)),
 682         dump_register(HCTSIZ(4)),
 683         dump_register(HCTSIZ(5)),
 684         dump_register(HCTSIZ(6)),
 685         dump_register(HCTSIZ(7)),
 686         dump_register(HCTSIZ(8)),
 687         dump_register(HCTSIZ(9)),
 688         dump_register(HCTSIZ(10)),
 689         dump_register(HCTSIZ(11)),
 690         dump_register(HCTSIZ(12)),
 691         dump_register(HCTSIZ(13)),
 692         dump_register(HCTSIZ(14)),
 693         dump_register(HCTSIZ(15)),
 694         dump_register(HCDMA(0)),
 695         dump_register(HCDMA(1)),
 696         dump_register(HCDMA(2)),
 697         dump_register(HCDMA(3)),
 698         dump_register(HCDMA(4)),
 699         dump_register(HCDMA(5)),
 700         dump_register(HCDMA(6)),
 701         dump_register(HCDMA(7)),
 702         dump_register(HCDMA(8)),
 703         dump_register(HCDMA(9)),
 704         dump_register(HCDMA(10)),
 705         dump_register(HCDMA(11)),
 706         dump_register(HCDMA(12)),
 707         dump_register(HCDMA(13)),
 708         dump_register(HCDMA(14)),
 709         dump_register(HCDMA(15)),
 710         dump_register(HCDMAB(0)),
 711         dump_register(HCDMAB(1)),
 712         dump_register(HCDMAB(2)),
 713         dump_register(HCDMAB(3)),
 714         dump_register(HCDMAB(4)),
 715         dump_register(HCDMAB(5)),
 716         dump_register(HCDMAB(6)),
 717         dump_register(HCDMAB(7)),
 718         dump_register(HCDMAB(8)),
 719         dump_register(HCDMAB(9)),
 720         dump_register(HCDMAB(10)),
 721         dump_register(HCDMAB(11)),
 722         dump_register(HCDMAB(12)),
 723         dump_register(HCDMAB(13)),
 724         dump_register(HCDMAB(14)),
 725         dump_register(HCDMAB(15)),
 726 };
 727
 728 int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
 729 {
 730         int                     ret;
 731         struct dentry           *file;
 732
 733         hsotg->debug_root = debugfs_create_dir(dev_name(hsotg->dev), NULL);
 734         if (!hsotg->debug_root) {
 735                 ret = -ENOMEM;
 736                 goto err0;
 737         }
 738
 739         /* Add gadget debugfs nodes */
 740         dwc2_hsotg_create_debug(hsotg);
 741
 742         hsotg->regset = devm_kzalloc(hsotg->dev, sizeof(*hsotg->regset),
 743                                                                 GFP_KERNEL);
 744         if (!hsotg->regset) {
 745                 ret = -ENOMEM;
 746                 goto err1;
 747         }
 748
 749         hsotg->regset->regs = dwc2_regs;
 750         hsotg->regset->nregs = ARRAY_SIZE(dwc2_regs);
 751         hsotg->regset->base = hsotg->regs;
 752
 753         file = debugfs_create_regset32("regdump", S_IRUGO, hsotg->debug_root,
 754                                                                 hsotg->regset);
 755         if (!file) {
 756                 ret = -ENOMEM;
 757                 goto err1;
 758         }
 759
 760         return 0;
 761 err1:
 762         debugfs_remove_recursive(hsotg->debug_root);
 763 err0:
 764         return ret;
 765 }
 766
 767 void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg)
 768 {
 769         debugfs_remove_recursive(hsotg->debug_root);
 770         hsotg->debug_root = NULL;
 771 }