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  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions, and the following disclaimer,
  14  *    without modification.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The names of the above-listed copyright holders may not be used
  19  *    to endorse or promote products derived from this software without
  20  *    specific prior written permission.
  21  *
  22  * ALTERNATIVELY, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2, as published by the Free
  24  * Software Foundation.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  27  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  28  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  30  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  31  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  32  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  33  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  34  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  35  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #include <linux/kernel.h>
  40 #include <linux/slab.h>
  41 #include <linux/ptrace.h>
  42 #include <linux/types.h>
  43 #include <linux/spinlock.h>
  44 #include <linux/debugfs.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/delay.h>
  47 #include <linux/uaccess.h>
  48
  49 #include "core.h"
  50 #include "gadget.h"
  51 #include "io.h"
  52 #include "debug.h"
  53
  54 #define dump_register(nm)                               \
  55 {                                                       \
  56         .name   = __stringify(nm),                      \
  57         .offset = DWC3_ ##nm,                           \
  58 }
  59
  60 static const struct debugfs_reg32 dwc3_regs[] = {
  61         dump_register(GSBUSCFG0),
  62         dump_register(GSBUSCFG1),
  63         dump_register(GTXTHRCFG),
  64         dump_register(GRXTHRCFG),
  65         dump_register(GCTL),
  66         dump_register(GEVTEN),
  67         dump_register(GSTS),
  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(GPRTBIMAP_HS0),
  87         dump_register(GPRTBIMAP_HS1),
  88         dump_register(GPRTBIMAP_FS0),
  89         dump_register(GPRTBIMAP_FS1),
  90
  91         dump_register(GUSB2PHYCFG(0)),
  92         dump_register(GUSB2PHYCFG(1)),
  93         dump_register(GUSB2PHYCFG(2)),
  94         dump_register(GUSB2PHYCFG(3)),
  95         dump_register(GUSB2PHYCFG(4)),
  96         dump_register(GUSB2PHYCFG(5)),
  97         dump_register(GUSB2PHYCFG(6)),
  98         dump_register(GUSB2PHYCFG(7)),
  99         dump_register(GUSB2PHYCFG(8)),
 100         dump_register(GUSB2PHYCFG(9)),
 101         dump_register(GUSB2PHYCFG(10)),
 102         dump_register(GUSB2PHYCFG(11)),
 103         dump_register(GUSB2PHYCFG(12)),
 104         dump_register(GUSB2PHYCFG(13)),
 105         dump_register(GUSB2PHYCFG(14)),
 106         dump_register(GUSB2PHYCFG(15)),
 107
 108         dump_register(GUSB2I2CCTL(0)),
 109         dump_register(GUSB2I2CCTL(1)),
 110         dump_register(GUSB2I2CCTL(2)),
 111         dump_register(GUSB2I2CCTL(3)),
 112         dump_register(GUSB2I2CCTL(4)),
 113         dump_register(GUSB2I2CCTL(5)),
 114         dump_register(GUSB2I2CCTL(6)),
 115         dump_register(GUSB2I2CCTL(7)),
 116         dump_register(GUSB2I2CCTL(8)),
 117         dump_register(GUSB2I2CCTL(9)),
 118         dump_register(GUSB2I2CCTL(10)),
 119         dump_register(GUSB2I2CCTL(11)),
 120         dump_register(GUSB2I2CCTL(12)),
 121         dump_register(GUSB2I2CCTL(13)),
 122         dump_register(GUSB2I2CCTL(14)),
 123         dump_register(GUSB2I2CCTL(15)),
 124
 125         dump_register(GUSB2PHYACC(0)),
 126         dump_register(GUSB2PHYACC(1)),
 127         dump_register(GUSB2PHYACC(2)),
 128         dump_register(GUSB2PHYACC(3)),
 129         dump_register(GUSB2PHYACC(4)),
 130         dump_register(GUSB2PHYACC(5)),
 131         dump_register(GUSB2PHYACC(6)),
 132         dump_register(GUSB2PHYACC(7)),
 133         dump_register(GUSB2PHYACC(8)),
 134         dump_register(GUSB2PHYACC(9)),
 135         dump_register(GUSB2PHYACC(10)),
 136         dump_register(GUSB2PHYACC(11)),
 137         dump_register(GUSB2PHYACC(12)),
 138         dump_register(GUSB2PHYACC(13)),
 139         dump_register(GUSB2PHYACC(14)),
 140         dump_register(GUSB2PHYACC(15)),
 141
 142         dump_register(GUSB3PIPECTL(0)),
 143         dump_register(GUSB3PIPECTL(1)),
 144         dump_register(GUSB3PIPECTL(2)),
 145         dump_register(GUSB3PIPECTL(3)),
 146         dump_register(GUSB3PIPECTL(4)),
 147         dump_register(GUSB3PIPECTL(5)),
 148         dump_register(GUSB3PIPECTL(6)),
 149         dump_register(GUSB3PIPECTL(7)),
 150         dump_register(GUSB3PIPECTL(8)),
 151         dump_register(GUSB3PIPECTL(9)),
 152         dump_register(GUSB3PIPECTL(10)),
 153         dump_register(GUSB3PIPECTL(11)),
 154         dump_register(GUSB3PIPECTL(12)),
 155         dump_register(GUSB3PIPECTL(13)),
 156         dump_register(GUSB3PIPECTL(14)),
 157         dump_register(GUSB3PIPECTL(15)),
 158
 159         dump_register(GTXFIFOSIZ(0)),
 160         dump_register(GTXFIFOSIZ(1)),
 161         dump_register(GTXFIFOSIZ(2)),
 162         dump_register(GTXFIFOSIZ(3)),
 163         dump_register(GTXFIFOSIZ(4)),
 164         dump_register(GTXFIFOSIZ(5)),
 165         dump_register(GTXFIFOSIZ(6)),
 166         dump_register(GTXFIFOSIZ(7)),
 167         dump_register(GTXFIFOSIZ(8)),
 168         dump_register(GTXFIFOSIZ(9)),
 169         dump_register(GTXFIFOSIZ(10)),
 170         dump_register(GTXFIFOSIZ(11)),
 171         dump_register(GTXFIFOSIZ(12)),
 172         dump_register(GTXFIFOSIZ(13)),
 173         dump_register(GTXFIFOSIZ(14)),
 174         dump_register(GTXFIFOSIZ(15)),
 175         dump_register(GTXFIFOSIZ(16)),
 176         dump_register(GTXFIFOSIZ(17)),
 177         dump_register(GTXFIFOSIZ(18)),
 178         dump_register(GTXFIFOSIZ(19)),
 179         dump_register(GTXFIFOSIZ(20)),
 180         dump_register(GTXFIFOSIZ(21)),
 181         dump_register(GTXFIFOSIZ(22)),
 182         dump_register(GTXFIFOSIZ(23)),
 183         dump_register(GTXFIFOSIZ(24)),
 184         dump_register(GTXFIFOSIZ(25)),
 185         dump_register(GTXFIFOSIZ(26)),
 186         dump_register(GTXFIFOSIZ(27)),
 187         dump_register(GTXFIFOSIZ(28)),
 188         dump_register(GTXFIFOSIZ(29)),
 189         dump_register(GTXFIFOSIZ(30)),
 190         dump_register(GTXFIFOSIZ(31)),
 191
 192         dump_register(GRXFIFOSIZ(0)),
 193         dump_register(GRXFIFOSIZ(1)),
 194         dump_register(GRXFIFOSIZ(2)),
 195         dump_register(GRXFIFOSIZ(3)),
 196         dump_register(GRXFIFOSIZ(4)),
 197         dump_register(GRXFIFOSIZ(5)),
 198         dump_register(GRXFIFOSIZ(6)),
 199         dump_register(GRXFIFOSIZ(7)),
 200         dump_register(GRXFIFOSIZ(8)),
 201         dump_register(GRXFIFOSIZ(9)),
 202         dump_register(GRXFIFOSIZ(10)),
 203         dump_register(GRXFIFOSIZ(11)),
 204         dump_register(GRXFIFOSIZ(12)),
 205         dump_register(GRXFIFOSIZ(13)),
 206         dump_register(GRXFIFOSIZ(14)),
 207         dump_register(GRXFIFOSIZ(15)),
 208         dump_register(GRXFIFOSIZ(16)),
 209         dump_register(GRXFIFOSIZ(17)),
 210         dump_register(GRXFIFOSIZ(18)),
 211         dump_register(GRXFIFOSIZ(19)),
 212         dump_register(GRXFIFOSIZ(20)),
 213         dump_register(GRXFIFOSIZ(21)),
 214         dump_register(GRXFIFOSIZ(22)),
 215         dump_register(GRXFIFOSIZ(23)),
 216         dump_register(GRXFIFOSIZ(24)),
 217         dump_register(GRXFIFOSIZ(25)),
 218         dump_register(GRXFIFOSIZ(26)),
 219         dump_register(GRXFIFOSIZ(27)),
 220         dump_register(GRXFIFOSIZ(28)),
 221         dump_register(GRXFIFOSIZ(29)),
 222         dump_register(GRXFIFOSIZ(30)),
 223         dump_register(GRXFIFOSIZ(31)),
 224
 225         dump_register(GEVNTADRLO(0)),
 226         dump_register(GEVNTADRHI(0)),
 227         dump_register(GEVNTSIZ(0)),
 228         dump_register(GEVNTCOUNT(0)),
 229
 230         dump_register(GHWPARAMS8),
 231         dump_register(DCFG),
 232         dump_register(DCTL),
 233         dump_register(DEVTEN),
 234         dump_register(DSTS),
 235         dump_register(DGCMDPAR),
 236         dump_register(DGCMD),
 237         dump_register(DALEPENA),
 238
 239         dump_register(DEPCMDPAR2(0)),
 240         dump_register(DEPCMDPAR2(1)),
 241         dump_register(DEPCMDPAR2(2)),
 242         dump_register(DEPCMDPAR2(3)),
 243         dump_register(DEPCMDPAR2(4)),
 244         dump_register(DEPCMDPAR2(5)),
 245         dump_register(DEPCMDPAR2(6)),
 246         dump_register(DEPCMDPAR2(7)),
 247         dump_register(DEPCMDPAR2(8)),
 248         dump_register(DEPCMDPAR2(9)),
 249         dump_register(DEPCMDPAR2(10)),
 250         dump_register(DEPCMDPAR2(11)),
 251         dump_register(DEPCMDPAR2(12)),
 252         dump_register(DEPCMDPAR2(13)),
 253         dump_register(DEPCMDPAR2(14)),
 254         dump_register(DEPCMDPAR2(15)),
 255         dump_register(DEPCMDPAR2(16)),
 256         dump_register(DEPCMDPAR2(17)),
 257         dump_register(DEPCMDPAR2(18)),
 258         dump_register(DEPCMDPAR2(19)),
 259         dump_register(DEPCMDPAR2(20)),
 260         dump_register(DEPCMDPAR2(21)),
 261         dump_register(DEPCMDPAR2(22)),
 262         dump_register(DEPCMDPAR2(23)),
 263         dump_register(DEPCMDPAR2(24)),
 264         dump_register(DEPCMDPAR2(25)),
 265         dump_register(DEPCMDPAR2(26)),
 266         dump_register(DEPCMDPAR2(27)),
 267         dump_register(DEPCMDPAR2(28)),
 268         dump_register(DEPCMDPAR2(29)),
 269         dump_register(DEPCMDPAR2(30)),
 270         dump_register(DEPCMDPAR2(31)),
 271
 272         dump_register(DEPCMDPAR1(0)),
 273         dump_register(DEPCMDPAR1(1)),
 274         dump_register(DEPCMDPAR1(2)),
 275         dump_register(DEPCMDPAR1(3)),
 276         dump_register(DEPCMDPAR1(4)),
 277         dump_register(DEPCMDPAR1(5)),
 278         dump_register(DEPCMDPAR1(6)),
 279         dump_register(DEPCMDPAR1(7)),
 280         dump_register(DEPCMDPAR1(8)),
 281         dump_register(DEPCMDPAR1(9)),
 282         dump_register(DEPCMDPAR1(10)),
 283         dump_register(DEPCMDPAR1(11)),
 284         dump_register(DEPCMDPAR1(12)),
 285         dump_register(DEPCMDPAR1(13)),
 286         dump_register(DEPCMDPAR1(14)),
 287         dump_register(DEPCMDPAR1(15)),
 288         dump_register(DEPCMDPAR1(16)),
 289         dump_register(DEPCMDPAR1(17)),
 290         dump_register(DEPCMDPAR1(18)),
 291         dump_register(DEPCMDPAR1(19)),
 292         dump_register(DEPCMDPAR1(20)),
 293         dump_register(DEPCMDPAR1(21)),
 294         dump_register(DEPCMDPAR1(22)),
 295         dump_register(DEPCMDPAR1(23)),
 296         dump_register(DEPCMDPAR1(24)),
 297         dump_register(DEPCMDPAR1(25)),
 298         dump_register(DEPCMDPAR1(26)),
 299         dump_register(DEPCMDPAR1(27)),
 300         dump_register(DEPCMDPAR1(28)),
 301         dump_register(DEPCMDPAR1(29)),
 302         dump_register(DEPCMDPAR1(30)),
 303         dump_register(DEPCMDPAR1(31)),
 304
 305         dump_register(DEPCMDPAR0(0)),
 306         dump_register(DEPCMDPAR0(1)),
 307         dump_register(DEPCMDPAR0(2)),
 308         dump_register(DEPCMDPAR0(3)),
 309         dump_register(DEPCMDPAR0(4)),
 310         dump_register(DEPCMDPAR0(5)),
 311         dump_register(DEPCMDPAR0(6)),
 312         dump_register(DEPCMDPAR0(7)),
 313         dump_register(DEPCMDPAR0(8)),
 314         dump_register(DEPCMDPAR0(9)),
 315         dump_register(DEPCMDPAR0(10)),
 316         dump_register(DEPCMDPAR0(11)),
 317         dump_register(DEPCMDPAR0(12)),
 318         dump_register(DEPCMDPAR0(13)),
 319         dump_register(DEPCMDPAR0(14)),
 320         dump_register(DEPCMDPAR0(15)),
 321         dump_register(DEPCMDPAR0(16)),
 322         dump_register(DEPCMDPAR0(17)),
 323         dump_register(DEPCMDPAR0(18)),
 324         dump_register(DEPCMDPAR0(19)),
 325         dump_register(DEPCMDPAR0(20)),
 326         dump_register(DEPCMDPAR0(21)),
 327         dump_register(DEPCMDPAR0(22)),
 328         dump_register(DEPCMDPAR0(23)),
 329         dump_register(DEPCMDPAR0(24)),
 330         dump_register(DEPCMDPAR0(25)),
 331         dump_register(DEPCMDPAR0(26)),
 332         dump_register(DEPCMDPAR0(27)),
 333         dump_register(DEPCMDPAR0(28)),
 334         dump_register(DEPCMDPAR0(29)),
 335         dump_register(DEPCMDPAR0(30)),
 336         dump_register(DEPCMDPAR0(31)),
 337
 338         dump_register(DEPCMD(0)),
 339         dump_register(DEPCMD(1)),
 340         dump_register(DEPCMD(2)),
 341         dump_register(DEPCMD(3)),
 342         dump_register(DEPCMD(4)),
 343         dump_register(DEPCMD(5)),
 344         dump_register(DEPCMD(6)),
 345         dump_register(DEPCMD(7)),
 346         dump_register(DEPCMD(8)),
 347         dump_register(DEPCMD(9)),
 348         dump_register(DEPCMD(10)),
 349         dump_register(DEPCMD(11)),
 350         dump_register(DEPCMD(12)),
 351         dump_register(DEPCMD(13)),
 352         dump_register(DEPCMD(14)),
 353         dump_register(DEPCMD(15)),
 354         dump_register(DEPCMD(16)),
 355         dump_register(DEPCMD(17)),
 356         dump_register(DEPCMD(18)),
 357         dump_register(DEPCMD(19)),
 358         dump_register(DEPCMD(20)),
 359         dump_register(DEPCMD(21)),
 360         dump_register(DEPCMD(22)),
 361         dump_register(DEPCMD(23)),
 362         dump_register(DEPCMD(24)),
 363         dump_register(DEPCMD(25)),
 364         dump_register(DEPCMD(26)),
 365         dump_register(DEPCMD(27)),
 366         dump_register(DEPCMD(28)),
 367         dump_register(DEPCMD(29)),
 368         dump_register(DEPCMD(30)),
 369         dump_register(DEPCMD(31)),
 370
 371         dump_register(OCFG),
 372         dump_register(OCTL),
 373         dump_register(OEVTEN),
 374         dump_register(OSTS),
 375 };
 376
 377 static int dwc3_regdump_show(struct seq_file *s, void *unused)
 378 {
 379         struct dwc3             *dwc = s->private;
 380
 381         seq_printf(s, "DesignWare USB3 Core Register Dump\n");
 382         debugfs_print_regs32(s, dwc3_regs, ARRAY_SIZE(dwc3_regs),
 383                              dwc->regs, "");
 384         return 0;
 385 }
 386
 387 static int dwc3_regdump_open(struct inode *inode, struct file *file)
 388 {
 389         return single_open(file, dwc3_regdump_show, inode->i_private);
 390 }
 391
 392 static const struct file_operations dwc3_regdump_fops = {
 393         .open                   = dwc3_regdump_open,
 394         .read                   = seq_read,
 395         .release                = single_release,
 396 };
 397
 398 static int dwc3_mode_show(struct seq_file *s, void *unused)
 399 {
 400         struct dwc3             *dwc = s->private;
 401         unsigned long           flags;
 402         u32                     reg;
 403
 404         spin_lock_irqsave(&dwc->lock, flags);
 405         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 406         spin_unlock_irqrestore(&dwc->lock, flags);
 407
 408         switch (DWC3_GCTL_PRTCAP(reg)) {
 409         case DWC3_GCTL_PRTCAP_HOST:
 410                 seq_printf(s, "host\n");
 411                 break;
 412         case DWC3_GCTL_PRTCAP_DEVICE:
 413                 seq_printf(s, "device\n");
 414                 break;
 415         case DWC3_GCTL_PRTCAP_OTG:
 416                 seq_printf(s, "OTG\n");
 417                 break;
 418         default:
 419                 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
 420         }
 421
 422         return 0;
 423 }
 424
 425 static int dwc3_mode_open(struct inode *inode, struct file *file)
 426 {
 427         return single_open(file, dwc3_mode_show, inode->i_private);
 428 }
 429
 430 static ssize_t dwc3_mode_write(struct file *file,
 431                 const char __user *ubuf, size_t count, loff_t *ppos)
 432 {
 433         struct seq_file         *s = file->private_data;
 434         struct dwc3             *dwc = s->private;
 435         unsigned long           flags;
 436         u32                     mode = 0;
 437         char                    buf[32];
 438
 439         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
 440                 return -EFAULT;
 441
 442         if (!strncmp(buf, "host", 4))
 443                 mode |= DWC3_GCTL_PRTCAP_HOST;
 444
 445         if (!strncmp(buf, "device", 6))
 446                 mode |= DWC3_GCTL_PRTCAP_DEVICE;
 447
 448         if (!strncmp(buf, "otg", 3))
 449                 mode |= DWC3_GCTL_PRTCAP_OTG;
 450
 451         if (mode) {
 452                 spin_lock_irqsave(&dwc->lock, flags);
 453                 dwc3_set_mode(dwc, mode);
 454                 spin_unlock_irqrestore(&dwc->lock, flags);
 455         }
 456         return count;
 457 }
 458
 459 static const struct file_operations dwc3_mode_fops = {
 460         .open                   = dwc3_mode_open,
 461         .write                  = dwc3_mode_write,
 462         .read                   = seq_read,
 463         .llseek                 = seq_lseek,
 464         .release                = single_release,
 465 };
 466
 467 int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 468 {
 469         struct dentry           *root;
 470         struct dentry           *file;
 471         int                     ret;
 472
 473         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
 474         if (IS_ERR(root)) {
 475                 ret = PTR_ERR(root);
 476                 goto err0;
 477         }
 478
 479         dwc->root = root;
 480
 481         file = debugfs_create_file("regdump", S_IRUGO, root, dwc,
 482                         &dwc3_regdump_fops);
 483         if (IS_ERR(file)) {
 484                 ret = PTR_ERR(file);
 485                 goto err1;
 486         }
 487
 488         file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
 489                         dwc, &dwc3_mode_fops);
 490         if (IS_ERR(file)) {
 491                 ret = PTR_ERR(file);
 492                 goto err1;
 493         }
 494
 495         return 0;
 496
 497 err1:
 498         debugfs_remove_recursive(root);
 499
 500 err0:
 501         return ret;
 502 }
 503
 504 void __devexit dwc3_debugfs_exit(struct dwc3 *dwc)
 505 {
 506         debugfs_remove_recursive(dwc->root);
 507         dwc->root = NULL;
 508 }