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 <linux/usb/ch9.h> 50 51 #include "core.h" 52 #include "gadget.h" 53 #include "io.h" 54 #include "debug.h" 55 56 #define dump_register(nm) \ 57 { \ 58 .name = __stringify(nm), \ 59 .offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \ 60 } 61 62 static struct debugfs_reg32 dwc3_regs[] = { 63 dump_register(GSBUSCFG0), 64 dump_register(GSBUSCFG1), 65 dump_register(GTXTHRCFG), 66 dump_register(GRXTHRCFG), 67 dump_register(GCTL), 68 dump_register(GEVTEN), 69 dump_register(GSTS), 70 dump_register(GSNPSID), 71 dump_register(GGPIO), 72 dump_register(GUID), 73 dump_register(GUCTL), 74 dump_register(GBUSERRADDR0), 75 dump_register(GBUSERRADDR1), 76 dump_register(GPRTBIMAP0), 77 dump_register(GPRTBIMAP1), 78 dump_register(GHWPARAMS0), 79 dump_register(GHWPARAMS1), 80 dump_register(GHWPARAMS2), 81 dump_register(GHWPARAMS3), 82 dump_register(GHWPARAMS4), 83 dump_register(GHWPARAMS5), 84 dump_register(GHWPARAMS6), 85 dump_register(GHWPARAMS7), 86 dump_register(GDBGFIFOSPACE), 87 dump_register(GDBGLTSSM), 88 dump_register(GPRTBIMAP_HS0), 89 dump_register(GPRTBIMAP_HS1), 90 dump_register(GPRTBIMAP_FS0), 91 dump_register(GPRTBIMAP_FS1), 92 93 dump_register(GUSB2PHYCFG(0)), 94 dump_register(GUSB2PHYCFG(1)), 95 dump_register(GUSB2PHYCFG(2)), 96 dump_register(GUSB2PHYCFG(3)), 97 dump_register(GUSB2PHYCFG(4)), 98 dump_register(GUSB2PHYCFG(5)), 99 dump_register(GUSB2PHYCFG(6)), 100 dump_register(GUSB2PHYCFG(7)), 101 dump_register(GUSB2PHYCFG(8)), 102 dump_register(GUSB2PHYCFG(9)), 103 dump_register(GUSB2PHYCFG(10)), 104 dump_register(GUSB2PHYCFG(11)), 105 dump_register(GUSB2PHYCFG(12)), 106 dump_register(GUSB2PHYCFG(13)), 107 dump_register(GUSB2PHYCFG(14)), 108 dump_register(GUSB2PHYCFG(15)), 109 110 dump_register(GUSB2I2CCTL(0)), 111 dump_register(GUSB2I2CCTL(1)), 112 dump_register(GUSB2I2CCTL(2)), 113 dump_register(GUSB2I2CCTL(3)), 114 dump_register(GUSB2I2CCTL(4)), 115 dump_register(GUSB2I2CCTL(5)), 116 dump_register(GUSB2I2CCTL(6)), 117 dump_register(GUSB2I2CCTL(7)), 118 dump_register(GUSB2I2CCTL(8)), 119 dump_register(GUSB2I2CCTL(9)), 120 dump_register(GUSB2I2CCTL(10)), 121 dump_register(GUSB2I2CCTL(11)), 122 dump_register(GUSB2I2CCTL(12)), 123 dump_register(GUSB2I2CCTL(13)), 124 dump_register(GUSB2I2CCTL(14)), 125 dump_register(GUSB2I2CCTL(15)), 126 127 dump_register(GUSB2PHYACC(0)), 128 dump_register(GUSB2PHYACC(1)), 129 dump_register(GUSB2PHYACC(2)), 130 dump_register(GUSB2PHYACC(3)), 131 dump_register(GUSB2PHYACC(4)), 132 dump_register(GUSB2PHYACC(5)), 133 dump_register(GUSB2PHYACC(6)), 134 dump_register(GUSB2PHYACC(7)), 135 dump_register(GUSB2PHYACC(8)), 136 dump_register(GUSB2PHYACC(9)), 137 dump_register(GUSB2PHYACC(10)), 138 dump_register(GUSB2PHYACC(11)), 139 dump_register(GUSB2PHYACC(12)), 140 dump_register(GUSB2PHYACC(13)), 141 dump_register(GUSB2PHYACC(14)), 142 dump_register(GUSB2PHYACC(15)), 143 144 dump_register(GUSB3PIPECTL(0)), 145 dump_register(GUSB3PIPECTL(1)), 146 dump_register(GUSB3PIPECTL(2)), 147 dump_register(GUSB3PIPECTL(3)), 148 dump_register(GUSB3PIPECTL(4)), 149 dump_register(GUSB3PIPECTL(5)), 150 dump_register(GUSB3PIPECTL(6)), 151 dump_register(GUSB3PIPECTL(7)), 152 dump_register(GUSB3PIPECTL(8)), 153 dump_register(GUSB3PIPECTL(9)), 154 dump_register(GUSB3PIPECTL(10)), 155 dump_register(GUSB3PIPECTL(11)), 156 dump_register(GUSB3PIPECTL(12)), 157 dump_register(GUSB3PIPECTL(13)), 158 dump_register(GUSB3PIPECTL(14)), 159 dump_register(GUSB3PIPECTL(15)), 160 161 dump_register(GTXFIFOSIZ(0)), 162 dump_register(GTXFIFOSIZ(1)), 163 dump_register(GTXFIFOSIZ(2)), 164 dump_register(GTXFIFOSIZ(3)), 165 dump_register(GTXFIFOSIZ(4)), 166 dump_register(GTXFIFOSIZ(5)), 167 dump_register(GTXFIFOSIZ(6)), 168 dump_register(GTXFIFOSIZ(7)), 169 dump_register(GTXFIFOSIZ(8)), 170 dump_register(GTXFIFOSIZ(9)), 171 dump_register(GTXFIFOSIZ(10)), 172 dump_register(GTXFIFOSIZ(11)), 173 dump_register(GTXFIFOSIZ(12)), 174 dump_register(GTXFIFOSIZ(13)), 175 dump_register(GTXFIFOSIZ(14)), 176 dump_register(GTXFIFOSIZ(15)), 177 dump_register(GTXFIFOSIZ(16)), 178 dump_register(GTXFIFOSIZ(17)), 179 dump_register(GTXFIFOSIZ(18)), 180 dump_register(GTXFIFOSIZ(19)), 181 dump_register(GTXFIFOSIZ(20)), 182 dump_register(GTXFIFOSIZ(21)), 183 dump_register(GTXFIFOSIZ(22)), 184 dump_register(GTXFIFOSIZ(23)), 185 dump_register(GTXFIFOSIZ(24)), 186 dump_register(GTXFIFOSIZ(25)), 187 dump_register(GTXFIFOSIZ(26)), 188 dump_register(GTXFIFOSIZ(27)), 189 dump_register(GTXFIFOSIZ(28)), 190 dump_register(GTXFIFOSIZ(29)), 191 dump_register(GTXFIFOSIZ(30)), 192 dump_register(GTXFIFOSIZ(31)), 193 194 dump_register(GRXFIFOSIZ(0)), 195 dump_register(GRXFIFOSIZ(1)), 196 dump_register(GRXFIFOSIZ(2)), 197 dump_register(GRXFIFOSIZ(3)), 198 dump_register(GRXFIFOSIZ(4)), 199 dump_register(GRXFIFOSIZ(5)), 200 dump_register(GRXFIFOSIZ(6)), 201 dump_register(GRXFIFOSIZ(7)), 202 dump_register(GRXFIFOSIZ(8)), 203 dump_register(GRXFIFOSIZ(9)), 204 dump_register(GRXFIFOSIZ(10)), 205 dump_register(GRXFIFOSIZ(11)), 206 dump_register(GRXFIFOSIZ(12)), 207 dump_register(GRXFIFOSIZ(13)), 208 dump_register(GRXFIFOSIZ(14)), 209 dump_register(GRXFIFOSIZ(15)), 210 dump_register(GRXFIFOSIZ(16)), 211 dump_register(GRXFIFOSIZ(17)), 212 dump_register(GRXFIFOSIZ(18)), 213 dump_register(GRXFIFOSIZ(19)), 214 dump_register(GRXFIFOSIZ(20)), 215 dump_register(GRXFIFOSIZ(21)), 216 dump_register(GRXFIFOSIZ(22)), 217 dump_register(GRXFIFOSIZ(23)), 218 dump_register(GRXFIFOSIZ(24)), 219 dump_register(GRXFIFOSIZ(25)), 220 dump_register(GRXFIFOSIZ(26)), 221 dump_register(GRXFIFOSIZ(27)), 222 dump_register(GRXFIFOSIZ(28)), 223 dump_register(GRXFIFOSIZ(29)), 224 dump_register(GRXFIFOSIZ(30)), 225 dump_register(GRXFIFOSIZ(31)), 226 227 dump_register(GEVNTADRLO(0)), 228 dump_register(GEVNTADRHI(0)), 229 dump_register(GEVNTSIZ(0)), 230 dump_register(GEVNTCOUNT(0)), 231 232 dump_register(GHWPARAMS8), 233 dump_register(DCFG), 234 dump_register(DCTL), 235 dump_register(DEVTEN), 236 dump_register(DSTS), 237 dump_register(DGCMDPAR), 238 dump_register(DGCMD), 239 dump_register(DALEPENA), 240 241 dump_register(DEPCMDPAR2(0)), 242 dump_register(DEPCMDPAR2(1)), 243 dump_register(DEPCMDPAR2(2)), 244 dump_register(DEPCMDPAR2(3)), 245 dump_register(DEPCMDPAR2(4)), 246 dump_register(DEPCMDPAR2(5)), 247 dump_register(DEPCMDPAR2(6)), 248 dump_register(DEPCMDPAR2(7)), 249 dump_register(DEPCMDPAR2(8)), 250 dump_register(DEPCMDPAR2(9)), 251 dump_register(DEPCMDPAR2(10)), 252 dump_register(DEPCMDPAR2(11)), 253 dump_register(DEPCMDPAR2(12)), 254 dump_register(DEPCMDPAR2(13)), 255 dump_register(DEPCMDPAR2(14)), 256 dump_register(DEPCMDPAR2(15)), 257 dump_register(DEPCMDPAR2(16)), 258 dump_register(DEPCMDPAR2(17)), 259 dump_register(DEPCMDPAR2(18)), 260 dump_register(DEPCMDPAR2(19)), 261 dump_register(DEPCMDPAR2(20)), 262 dump_register(DEPCMDPAR2(21)), 263 dump_register(DEPCMDPAR2(22)), 264 dump_register(DEPCMDPAR2(23)), 265 dump_register(DEPCMDPAR2(24)), 266 dump_register(DEPCMDPAR2(25)), 267 dump_register(DEPCMDPAR2(26)), 268 dump_register(DEPCMDPAR2(27)), 269 dump_register(DEPCMDPAR2(28)), 270 dump_register(DEPCMDPAR2(29)), 271 dump_register(DEPCMDPAR2(30)), 272 dump_register(DEPCMDPAR2(31)), 273 274 dump_register(DEPCMDPAR1(0)), 275 dump_register(DEPCMDPAR1(1)), 276 dump_register(DEPCMDPAR1(2)), 277 dump_register(DEPCMDPAR1(3)), 278 dump_register(DEPCMDPAR1(4)), 279 dump_register(DEPCMDPAR1(5)), 280 dump_register(DEPCMDPAR1(6)), 281 dump_register(DEPCMDPAR1(7)), 282 dump_register(DEPCMDPAR1(8)), 283 dump_register(DEPCMDPAR1(9)), 284 dump_register(DEPCMDPAR1(10)), 285 dump_register(DEPCMDPAR1(11)), 286 dump_register(DEPCMDPAR1(12)), 287 dump_register(DEPCMDPAR1(13)), 288 dump_register(DEPCMDPAR1(14)), 289 dump_register(DEPCMDPAR1(15)), 290 dump_register(DEPCMDPAR1(16)), 291 dump_register(DEPCMDPAR1(17)), 292 dump_register(DEPCMDPAR1(18)), 293 dump_register(DEPCMDPAR1(19)), 294 dump_register(DEPCMDPAR1(20)), 295 dump_register(DEPCMDPAR1(21)), 296 dump_register(DEPCMDPAR1(22)), 297 dump_register(DEPCMDPAR1(23)), 298 dump_register(DEPCMDPAR1(24)), 299 dump_register(DEPCMDPAR1(25)), 300 dump_register(DEPCMDPAR1(26)), 301 dump_register(DEPCMDPAR1(27)), 302 dump_register(DEPCMDPAR1(28)), 303 dump_register(DEPCMDPAR1(29)), 304 dump_register(DEPCMDPAR1(30)), 305 dump_register(DEPCMDPAR1(31)), 306 307 dump_register(DEPCMDPAR0(0)), 308 dump_register(DEPCMDPAR0(1)), 309 dump_register(DEPCMDPAR0(2)), 310 dump_register(DEPCMDPAR0(3)), 311 dump_register(DEPCMDPAR0(4)), 312 dump_register(DEPCMDPAR0(5)), 313 dump_register(DEPCMDPAR0(6)), 314 dump_register(DEPCMDPAR0(7)), 315 dump_register(DEPCMDPAR0(8)), 316 dump_register(DEPCMDPAR0(9)), 317 dump_register(DEPCMDPAR0(10)), 318 dump_register(DEPCMDPAR0(11)), 319 dump_register(DEPCMDPAR0(12)), 320 dump_register(DEPCMDPAR0(13)), 321 dump_register(DEPCMDPAR0(14)), 322 dump_register(DEPCMDPAR0(15)), 323 dump_register(DEPCMDPAR0(16)), 324 dump_register(DEPCMDPAR0(17)), 325 dump_register(DEPCMDPAR0(18)), 326 dump_register(DEPCMDPAR0(19)), 327 dump_register(DEPCMDPAR0(20)), 328 dump_register(DEPCMDPAR0(21)), 329 dump_register(DEPCMDPAR0(22)), 330 dump_register(DEPCMDPAR0(23)), 331 dump_register(DEPCMDPAR0(24)), 332 dump_register(DEPCMDPAR0(25)), 333 dump_register(DEPCMDPAR0(26)), 334 dump_register(DEPCMDPAR0(27)), 335 dump_register(DEPCMDPAR0(28)), 336 dump_register(DEPCMDPAR0(29)), 337 dump_register(DEPCMDPAR0(30)), 338 dump_register(DEPCMDPAR0(31)), 339 340 dump_register(DEPCMD(0)), 341 dump_register(DEPCMD(1)), 342 dump_register(DEPCMD(2)), 343 dump_register(DEPCMD(3)), 344 dump_register(DEPCMD(4)), 345 dump_register(DEPCMD(5)), 346 dump_register(DEPCMD(6)), 347 dump_register(DEPCMD(7)), 348 dump_register(DEPCMD(8)), 349 dump_register(DEPCMD(9)), 350 dump_register(DEPCMD(10)), 351 dump_register(DEPCMD(11)), 352 dump_register(DEPCMD(12)), 353 dump_register(DEPCMD(13)), 354 dump_register(DEPCMD(14)), 355 dump_register(DEPCMD(15)), 356 dump_register(DEPCMD(16)), 357 dump_register(DEPCMD(17)), 358 dump_register(DEPCMD(18)), 359 dump_register(DEPCMD(19)), 360 dump_register(DEPCMD(20)), 361 dump_register(DEPCMD(21)), 362 dump_register(DEPCMD(22)), 363 dump_register(DEPCMD(23)), 364 dump_register(DEPCMD(24)), 365 dump_register(DEPCMD(25)), 366 dump_register(DEPCMD(26)), 367 dump_register(DEPCMD(27)), 368 dump_register(DEPCMD(28)), 369 dump_register(DEPCMD(29)), 370 dump_register(DEPCMD(30)), 371 dump_register(DEPCMD(31)), 372 373 dump_register(OCFG), 374 dump_register(OCTL), 375 dump_register(OEVTEN), 376 dump_register(OSTS), 377 }; 378 379 static int dwc3_mode_show(struct seq_file *s, void *unused) 380 { 381 struct dwc3 *dwc = s->private; 382 unsigned long flags; 383 u32 reg; 384 385 spin_lock_irqsave(&dwc->lock, flags); 386 reg = dwc3_readl(dwc->regs, DWC3_GCTL); 387 spin_unlock_irqrestore(&dwc->lock, flags); 388 389 switch (DWC3_GCTL_PRTCAP(reg)) { 390 case DWC3_GCTL_PRTCAP_HOST: 391 seq_printf(s, "host\n"); 392 break; 393 case DWC3_GCTL_PRTCAP_DEVICE: 394 seq_printf(s, "device\n"); 395 break; 396 case DWC3_GCTL_PRTCAP_OTG: 397 seq_printf(s, "OTG\n"); 398 break; 399 default: 400 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg)); 401 } 402 403 return 0; 404 } 405 406 static int dwc3_mode_open(struct inode *inode, struct file *file) 407 { 408 return single_open(file, dwc3_mode_show, inode->i_private); 409 } 410 411 static ssize_t dwc3_mode_write(struct file *file, 412 const char __user *ubuf, size_t count, loff_t *ppos) 413 { 414 struct seq_file *s = file->private_data; 415 struct dwc3 *dwc = s->private; 416 unsigned long flags; 417 u32 mode = 0; 418 char buf[32]; 419 420 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 421 return -EFAULT; 422 423 if (!strncmp(buf, "host", 4)) 424 mode |= DWC3_GCTL_PRTCAP_HOST; 425 426 if (!strncmp(buf, "device", 6)) 427 mode |= DWC3_GCTL_PRTCAP_DEVICE; 428 429 if (!strncmp(buf, "otg", 3)) 430 mode |= DWC3_GCTL_PRTCAP_OTG; 431 432 if (mode) { 433 spin_lock_irqsave(&dwc->lock, flags); 434 dwc3_set_mode(dwc, mode); 435 spin_unlock_irqrestore(&dwc->lock, flags); 436 } 437 return count; 438 } 439 440 static const struct file_operations dwc3_mode_fops = { 441 .open = dwc3_mode_open, 442 .write = dwc3_mode_write, 443 .read = seq_read, 444 .llseek = seq_lseek, 445 .release = single_release, 446 }; 447 448 static int dwc3_testmode_show(struct seq_file *s, void *unused) 449 { 450 struct dwc3 *dwc = s->private; 451 unsigned long flags; 452 u32 reg; 453 454 spin_lock_irqsave(&dwc->lock, flags); 455 reg = dwc3_readl(dwc->regs, DWC3_DCTL); 456 reg &= DWC3_DCTL_TSTCTRL_MASK; 457 reg >>= 1; 458 spin_unlock_irqrestore(&dwc->lock, flags); 459 460 switch (reg) { 461 case 0: 462 seq_printf(s, "no test\n"); 463 break; 464 case TEST_J: 465 seq_printf(s, "test_j\n"); 466 break; 467 case TEST_K: 468 seq_printf(s, "test_k\n"); 469 break; 470 case TEST_SE0_NAK: 471 seq_printf(s, "test_se0_nak\n"); 472 break; 473 case TEST_PACKET: 474 seq_printf(s, "test_packet\n"); 475 break; 476 case TEST_FORCE_EN: 477 seq_printf(s, "test_force_enable\n"); 478 break; 479 default: 480 seq_printf(s, "UNKNOWN %d\n", reg); 481 } 482 483 return 0; 484 } 485 486 static int dwc3_testmode_open(struct inode *inode, struct file *file) 487 { 488 return single_open(file, dwc3_testmode_show, inode->i_private); 489 } 490 491 static ssize_t dwc3_testmode_write(struct file *file, 492 const char __user *ubuf, size_t count, loff_t *ppos) 493 { 494 struct seq_file *s = file->private_data; 495 struct dwc3 *dwc = s->private; 496 unsigned long flags; 497 u32 testmode = 0; 498 char buf[32]; 499 500 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 501 return -EFAULT; 502 503 if (!strncmp(buf, "test_j", 6)) 504 testmode = TEST_J; 505 else if (!strncmp(buf, "test_k", 6)) 506 testmode = TEST_K; 507 else if (!strncmp(buf, "test_se0_nak", 12)) 508 testmode = TEST_SE0_NAK; 509 else if (!strncmp(buf, "test_packet", 11)) 510 testmode = TEST_PACKET; 511 else if (!strncmp(buf, "test_force_enable", 17)) 512 testmode = TEST_FORCE_EN; 513 else 514 testmode = 0; 515 516 spin_lock_irqsave(&dwc->lock, flags); 517 dwc3_gadget_set_test_mode(dwc, testmode); 518 spin_unlock_irqrestore(&dwc->lock, flags); 519 520 return count; 521 } 522 523 static const struct file_operations dwc3_testmode_fops = { 524 .open = dwc3_testmode_open, 525 .write = dwc3_testmode_write, 526 .read = seq_read, 527 .llseek = seq_lseek, 528 .release = single_release, 529 }; 530 531 static int dwc3_link_state_show(struct seq_file *s, void *unused) 532 { 533 struct dwc3 *dwc = s->private; 534 unsigned long flags; 535 enum dwc3_link_state state; 536 u32 reg; 537 538 spin_lock_irqsave(&dwc->lock, flags); 539 reg = dwc3_readl(dwc->regs, DWC3_DSTS); 540 state = DWC3_DSTS_USBLNKST(reg); 541 spin_unlock_irqrestore(&dwc->lock, flags); 542 543 switch (state) { 544 case DWC3_LINK_STATE_U0: 545 seq_printf(s, "U0\n"); 546 break; 547 case DWC3_LINK_STATE_U1: 548 seq_printf(s, "U1\n"); 549 break; 550 case DWC3_LINK_STATE_U2: 551 seq_printf(s, "U2\n"); 552 break; 553 case DWC3_LINK_STATE_U3: 554 seq_printf(s, "U3\n"); 555 break; 556 case DWC3_LINK_STATE_SS_DIS: 557 seq_printf(s, "SS.Disabled\n"); 558 break; 559 case DWC3_LINK_STATE_RX_DET: 560 seq_printf(s, "Rx.Detect\n"); 561 break; 562 case DWC3_LINK_STATE_SS_INACT: 563 seq_printf(s, "SS.Inactive\n"); 564 break; 565 case DWC3_LINK_STATE_POLL: 566 seq_printf(s, "Poll\n"); 567 break; 568 case DWC3_LINK_STATE_RECOV: 569 seq_printf(s, "Recovery\n"); 570 break; 571 case DWC3_LINK_STATE_HRESET: 572 seq_printf(s, "HRESET\n"); 573 break; 574 case DWC3_LINK_STATE_CMPLY: 575 seq_printf(s, "Compliance\n"); 576 break; 577 case DWC3_LINK_STATE_LPBK: 578 seq_printf(s, "Loopback\n"); 579 break; 580 default: 581 seq_printf(s, "UNKNOWN %d\n", reg); 582 } 583 584 return 0; 585 } 586 587 static int dwc3_link_state_open(struct inode *inode, struct file *file) 588 { 589 return single_open(file, dwc3_link_state_show, inode->i_private); 590 } 591 592 static ssize_t dwc3_link_state_write(struct file *file, 593 const char __user *ubuf, size_t count, loff_t *ppos) 594 { 595 struct seq_file *s = file->private_data; 596 struct dwc3 *dwc = s->private; 597 unsigned long flags; 598 enum dwc3_link_state state = 0; 599 char buf[32]; 600 601 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 602 return -EFAULT; 603 604 if (!strncmp(buf, "SS.Disabled", 11)) 605 state = DWC3_LINK_STATE_SS_DIS; 606 else if (!strncmp(buf, "Rx.Detect", 9)) 607 state = DWC3_LINK_STATE_RX_DET; 608 else if (!strncmp(buf, "SS.Inactive", 11)) 609 state = DWC3_LINK_STATE_SS_INACT; 610 else if (!strncmp(buf, "Recovery", 8)) 611 state = DWC3_LINK_STATE_RECOV; 612 else if (!strncmp(buf, "Compliance", 10)) 613 state = DWC3_LINK_STATE_CMPLY; 614 else if (!strncmp(buf, "Loopback", 8)) 615 state = DWC3_LINK_STATE_LPBK; 616 else 617 return -EINVAL; 618 619 spin_lock_irqsave(&dwc->lock, flags); 620 dwc3_gadget_set_link_state(dwc, state); 621 spin_unlock_irqrestore(&dwc->lock, flags); 622 623 return count; 624 } 625 626 static const struct file_operations dwc3_link_state_fops = { 627 .open = dwc3_link_state_open, 628 .write = dwc3_link_state_write, 629 .read = seq_read, 630 .llseek = seq_lseek, 631 .release = single_release, 632 }; 633 634 int dwc3_debugfs_init(struct dwc3 *dwc) 635 { 636 struct dentry *root; 637 struct dentry *file; 638 int ret; 639 640 root = debugfs_create_dir(dev_name(dwc->dev), NULL); 641 if (!root) { 642 ret = -ENOMEM; 643 goto err0; 644 } 645 646 dwc->root = root; 647 648 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL); 649 if (!dwc->regset) { 650 ret = -ENOMEM; 651 goto err1; 652 } 653 654 dwc->regset->regs = dwc3_regs; 655 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs); 656 dwc->regset->base = dwc->regs; 657 658 file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset); 659 if (!file) { 660 ret = -ENOMEM; 661 goto err1; 662 } 663 664 #if IS_ENABLED(CONFIG_USB_DWC3_GADGET) 665 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, 666 dwc, &dwc3_mode_fops); 667 if (!file) { 668 ret = -ENOMEM; 669 goto err1; 670 } 671 672 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, 673 dwc, &dwc3_testmode_fops); 674 if (!file) { 675 ret = -ENOMEM; 676 goto err1; 677 } 678 679 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, 680 dwc, &dwc3_link_state_fops); 681 if (!file) { 682 ret = -ENOMEM; 683 goto err1; 684 } 685 #endif 686 687 return 0; 688 689 err1: 690 debugfs_remove_recursive(root); 691 692 err0: 693 return ret; 694 } 695 696 void dwc3_debugfs_exit(struct dwc3 *dwc) 697 { 698 debugfs_remove_recursive(dwc->root); 699 dwc->root = NULL; 700 } 701