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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / usb / dwc3 / debugfs.c
blob9ac37fe1b6a77956d530642db517e57eb3481fe8
1 /**
2 * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
3 *
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 of
11 * the License as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19 #include <linux/kernel.h>
20 #include <linux/slab.h>
21 #include <linux/ptrace.h>
22 #include <linux/types.h>
23 #include <linux/spinlock.h>
24 #include <linux/debugfs.h>
25 #include <linux/seq_file.h>
26 #include <linux/delay.h>
27 #include <linux/uaccess.h>
28
29 #include <linux/usb/ch9.h>
30
31 #include "core.h"
32 #include "gadget.h"
33 #include "io.h"
34 #include "debug.h"
35
36 #define dump_register(nm) \
37 { \
38 .name = __stringify(nm), \
39 .offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \
40 }
41
42 static const struct debugfs_reg32 dwc3_regs[] = {
43 dump_register(GSBUSCFG0),
44 dump_register(GSBUSCFG1),
45 dump_register(GTXTHRCFG),
46 dump_register(GRXTHRCFG),
47 dump_register(GCTL),
48 dump_register(GEVTEN),
49 dump_register(GSTS),
50 dump_register(GSNPSID),
51 dump_register(GGPIO),
52 dump_register(GUID),
53 dump_register(GUCTL),
54 dump_register(GBUSERRADDR0),
55 dump_register(GBUSERRADDR1),
56 dump_register(GPRTBIMAP0),
57 dump_register(GPRTBIMAP1),
58 dump_register(GHWPARAMS0),
59 dump_register(GHWPARAMS1),
60 dump_register(GHWPARAMS2),
61 dump_register(GHWPARAMS3),
62 dump_register(GHWPARAMS4),
63 dump_register(GHWPARAMS5),
64 dump_register(GHWPARAMS6),
65 dump_register(GHWPARAMS7),
66 dump_register(GDBGFIFOSPACE),
67 dump_register(GDBGLTSSM),
68 dump_register(GPRTBIMAP_HS0),
69 dump_register(GPRTBIMAP_HS1),
70 dump_register(GPRTBIMAP_FS0),
71 dump_register(GPRTBIMAP_FS1),
72
73 dump_register(GUSB2PHYCFG(0)),
74 dump_register(GUSB2PHYCFG(1)),
75 dump_register(GUSB2PHYCFG(2)),
76 dump_register(GUSB2PHYCFG(3)),
77 dump_register(GUSB2PHYCFG(4)),
78 dump_register(GUSB2PHYCFG(5)),
79 dump_register(GUSB2PHYCFG(6)),
80 dump_register(GUSB2PHYCFG(7)),
81 dump_register(GUSB2PHYCFG(8)),
82 dump_register(GUSB2PHYCFG(9)),
83 dump_register(GUSB2PHYCFG(10)),
84 dump_register(GUSB2PHYCFG(11)),
85 dump_register(GUSB2PHYCFG(12)),
86 dump_register(GUSB2PHYCFG(13)),
87 dump_register(GUSB2PHYCFG(14)),
88 dump_register(GUSB2PHYCFG(15)),
89
90 dump_register(GUSB2I2CCTL(0)),
91 dump_register(GUSB2I2CCTL(1)),
92 dump_register(GUSB2I2CCTL(2)),
93 dump_register(GUSB2I2CCTL(3)),
94 dump_register(GUSB2I2CCTL(4)),
95 dump_register(GUSB2I2CCTL(5)),
96 dump_register(GUSB2I2CCTL(6)),
97 dump_register(GUSB2I2CCTL(7)),
98 dump_register(GUSB2I2CCTL(8)),
99 dump_register(GUSB2I2CCTL(9)),
100 dump_register(GUSB2I2CCTL(10)),
101 dump_register(GUSB2I2CCTL(11)),
102 dump_register(GUSB2I2CCTL(12)),
103 dump_register(GUSB2I2CCTL(13)),
104 dump_register(GUSB2I2CCTL(14)),
105 dump_register(GUSB2I2CCTL(15)),
106
107 dump_register(GUSB2PHYACC(0)),
108 dump_register(GUSB2PHYACC(1)),
109 dump_register(GUSB2PHYACC(2)),
110 dump_register(GUSB2PHYACC(3)),
111 dump_register(GUSB2PHYACC(4)),
112 dump_register(GUSB2PHYACC(5)),
113 dump_register(GUSB2PHYACC(6)),
114 dump_register(GUSB2PHYACC(7)),
115 dump_register(GUSB2PHYACC(8)),
116 dump_register(GUSB2PHYACC(9)),
117 dump_register(GUSB2PHYACC(10)),
118 dump_register(GUSB2PHYACC(11)),
119 dump_register(GUSB2PHYACC(12)),
120 dump_register(GUSB2PHYACC(13)),
121 dump_register(GUSB2PHYACC(14)),
122 dump_register(GUSB2PHYACC(15)),
123
124 dump_register(GUSB3PIPECTL(0)),
125 dump_register(GUSB3PIPECTL(1)),
126 dump_register(GUSB3PIPECTL(2)),
127 dump_register(GUSB3PIPECTL(3)),
128 dump_register(GUSB3PIPECTL(4)),
129 dump_register(GUSB3PIPECTL(5)),
130 dump_register(GUSB3PIPECTL(6)),
131 dump_register(GUSB3PIPECTL(7)),
132 dump_register(GUSB3PIPECTL(8)),
133 dump_register(GUSB3PIPECTL(9)),
134 dump_register(GUSB3PIPECTL(10)),
135 dump_register(GUSB3PIPECTL(11)),
136 dump_register(GUSB3PIPECTL(12)),
137 dump_register(GUSB3PIPECTL(13)),
138 dump_register(GUSB3PIPECTL(14)),
139 dump_register(GUSB3PIPECTL(15)),
140
141 dump_register(GTXFIFOSIZ(0)),
142 dump_register(GTXFIFOSIZ(1)),
143 dump_register(GTXFIFOSIZ(2)),
144 dump_register(GTXFIFOSIZ(3)),
145 dump_register(GTXFIFOSIZ(4)),
146 dump_register(GTXFIFOSIZ(5)),
147 dump_register(GTXFIFOSIZ(6)),
148 dump_register(GTXFIFOSIZ(7)),
149 dump_register(GTXFIFOSIZ(8)),
150 dump_register(GTXFIFOSIZ(9)),
151 dump_register(GTXFIFOSIZ(10)),
152 dump_register(GTXFIFOSIZ(11)),
153 dump_register(GTXFIFOSIZ(12)),
154 dump_register(GTXFIFOSIZ(13)),
155 dump_register(GTXFIFOSIZ(14)),
156 dump_register(GTXFIFOSIZ(15)),
157 dump_register(GTXFIFOSIZ(16)),
158 dump_register(GTXFIFOSIZ(17)),
159 dump_register(GTXFIFOSIZ(18)),
160 dump_register(GTXFIFOSIZ(19)),
161 dump_register(GTXFIFOSIZ(20)),
162 dump_register(GTXFIFOSIZ(21)),
163 dump_register(GTXFIFOSIZ(22)),
164 dump_register(GTXFIFOSIZ(23)),
165 dump_register(GTXFIFOSIZ(24)),
166 dump_register(GTXFIFOSIZ(25)),
167 dump_register(GTXFIFOSIZ(26)),
168 dump_register(GTXFIFOSIZ(27)),
169 dump_register(GTXFIFOSIZ(28)),
170 dump_register(GTXFIFOSIZ(29)),
171 dump_register(GTXFIFOSIZ(30)),
172 dump_register(GTXFIFOSIZ(31)),
173
174 dump_register(GRXFIFOSIZ(0)),
175 dump_register(GRXFIFOSIZ(1)),
176 dump_register(GRXFIFOSIZ(2)),
177 dump_register(GRXFIFOSIZ(3)),
178 dump_register(GRXFIFOSIZ(4)),
179 dump_register(GRXFIFOSIZ(5)),
180 dump_register(GRXFIFOSIZ(6)),
181 dump_register(GRXFIFOSIZ(7)),
182 dump_register(GRXFIFOSIZ(8)),
183 dump_register(GRXFIFOSIZ(9)),
184 dump_register(GRXFIFOSIZ(10)),
185 dump_register(GRXFIFOSIZ(11)),
186 dump_register(GRXFIFOSIZ(12)),
187 dump_register(GRXFIFOSIZ(13)),
188 dump_register(GRXFIFOSIZ(14)),
189 dump_register(GRXFIFOSIZ(15)),
190 dump_register(GRXFIFOSIZ(16)),
191 dump_register(GRXFIFOSIZ(17)),
192 dump_register(GRXFIFOSIZ(18)),
193 dump_register(GRXFIFOSIZ(19)),
194 dump_register(GRXFIFOSIZ(20)),
195 dump_register(GRXFIFOSIZ(21)),
196 dump_register(GRXFIFOSIZ(22)),
197 dump_register(GRXFIFOSIZ(23)),
198 dump_register(GRXFIFOSIZ(24)),
199 dump_register(GRXFIFOSIZ(25)),
200 dump_register(GRXFIFOSIZ(26)),
201 dump_register(GRXFIFOSIZ(27)),
202 dump_register(GRXFIFOSIZ(28)),
203 dump_register(GRXFIFOSIZ(29)),
204 dump_register(GRXFIFOSIZ(30)),
205 dump_register(GRXFIFOSIZ(31)),
206
207 dump_register(GEVNTADRLO(0)),
208 dump_register(GEVNTADRHI(0)),
209 dump_register(GEVNTSIZ(0)),
210 dump_register(GEVNTCOUNT(0)),
211
212 dump_register(GHWPARAMS8),
213 dump_register(DCFG),
214 dump_register(DCTL),
215 dump_register(DEVTEN),
216 dump_register(DSTS),
217 dump_register(DGCMDPAR),
218 dump_register(DGCMD),
219 dump_register(DALEPENA),
220
221 dump_register(DEPCMDPAR2(0)),
222 dump_register(DEPCMDPAR2(1)),
223 dump_register(DEPCMDPAR2(2)),
224 dump_register(DEPCMDPAR2(3)),
225 dump_register(DEPCMDPAR2(4)),
226 dump_register(DEPCMDPAR2(5)),
227 dump_register(DEPCMDPAR2(6)),
228 dump_register(DEPCMDPAR2(7)),
229 dump_register(DEPCMDPAR2(8)),
230 dump_register(DEPCMDPAR2(9)),
231 dump_register(DEPCMDPAR2(10)),
232 dump_register(DEPCMDPAR2(11)),
233 dump_register(DEPCMDPAR2(12)),
234 dump_register(DEPCMDPAR2(13)),
235 dump_register(DEPCMDPAR2(14)),
236 dump_register(DEPCMDPAR2(15)),
237 dump_register(DEPCMDPAR2(16)),
238 dump_register(DEPCMDPAR2(17)),
239 dump_register(DEPCMDPAR2(18)),
240 dump_register(DEPCMDPAR2(19)),
241 dump_register(DEPCMDPAR2(20)),
242 dump_register(DEPCMDPAR2(21)),
243 dump_register(DEPCMDPAR2(22)),
244 dump_register(DEPCMDPAR2(23)),
245 dump_register(DEPCMDPAR2(24)),
246 dump_register(DEPCMDPAR2(25)),
247 dump_register(DEPCMDPAR2(26)),
248 dump_register(DEPCMDPAR2(27)),
249 dump_register(DEPCMDPAR2(28)),
250 dump_register(DEPCMDPAR2(29)),
251 dump_register(DEPCMDPAR2(30)),
252 dump_register(DEPCMDPAR2(31)),
253
254 dump_register(DEPCMDPAR1(0)),
255 dump_register(DEPCMDPAR1(1)),
256 dump_register(DEPCMDPAR1(2)),
257 dump_register(DEPCMDPAR1(3)),
258 dump_register(DEPCMDPAR1(4)),
259 dump_register(DEPCMDPAR1(5)),
260 dump_register(DEPCMDPAR1(6)),
261 dump_register(DEPCMDPAR1(7)),
262 dump_register(DEPCMDPAR1(8)),
263 dump_register(DEPCMDPAR1(9)),
264 dump_register(DEPCMDPAR1(10)),
265 dump_register(DEPCMDPAR1(11)),
266 dump_register(DEPCMDPAR1(12)),
267 dump_register(DEPCMDPAR1(13)),
268 dump_register(DEPCMDPAR1(14)),
269 dump_register(DEPCMDPAR1(15)),
270 dump_register(DEPCMDPAR1(16)),
271 dump_register(DEPCMDPAR1(17)),
272 dump_register(DEPCMDPAR1(18)),
273 dump_register(DEPCMDPAR1(19)),
274 dump_register(DEPCMDPAR1(20)),
275 dump_register(DEPCMDPAR1(21)),
276 dump_register(DEPCMDPAR1(22)),
277 dump_register(DEPCMDPAR1(23)),
278 dump_register(DEPCMDPAR1(24)),
279 dump_register(DEPCMDPAR1(25)),
280 dump_register(DEPCMDPAR1(26)),
281 dump_register(DEPCMDPAR1(27)),
282 dump_register(DEPCMDPAR1(28)),
283 dump_register(DEPCMDPAR1(29)),
284 dump_register(DEPCMDPAR1(30)),
285 dump_register(DEPCMDPAR1(31)),
286
287 dump_register(DEPCMDPAR0(0)),
288 dump_register(DEPCMDPAR0(1)),
289 dump_register(DEPCMDPAR0(2)),
290 dump_register(DEPCMDPAR0(3)),
291 dump_register(DEPCMDPAR0(4)),
292 dump_register(DEPCMDPAR0(5)),
293 dump_register(DEPCMDPAR0(6)),
294 dump_register(DEPCMDPAR0(7)),
295 dump_register(DEPCMDPAR0(8)),
296 dump_register(DEPCMDPAR0(9)),
297 dump_register(DEPCMDPAR0(10)),
298 dump_register(DEPCMDPAR0(11)),
299 dump_register(DEPCMDPAR0(12)),
300 dump_register(DEPCMDPAR0(13)),
301 dump_register(DEPCMDPAR0(14)),
302 dump_register(DEPCMDPAR0(15)),
303 dump_register(DEPCMDPAR0(16)),
304 dump_register(DEPCMDPAR0(17)),
305 dump_register(DEPCMDPAR0(18)),
306 dump_register(DEPCMDPAR0(19)),
307 dump_register(DEPCMDPAR0(20)),
308 dump_register(DEPCMDPAR0(21)),
309 dump_register(DEPCMDPAR0(22)),
310 dump_register(DEPCMDPAR0(23)),
311 dump_register(DEPCMDPAR0(24)),
312 dump_register(DEPCMDPAR0(25)),
313 dump_register(DEPCMDPAR0(26)),
314 dump_register(DEPCMDPAR0(27)),
315 dump_register(DEPCMDPAR0(28)),
316 dump_register(DEPCMDPAR0(29)),
317 dump_register(DEPCMDPAR0(30)),
318 dump_register(DEPCMDPAR0(31)),
319
320 dump_register(DEPCMD(0)),
321 dump_register(DEPCMD(1)),
322 dump_register(DEPCMD(2)),
323 dump_register(DEPCMD(3)),
324 dump_register(DEPCMD(4)),
325 dump_register(DEPCMD(5)),
326 dump_register(DEPCMD(6)),
327 dump_register(DEPCMD(7)),
328 dump_register(DEPCMD(8)),
329 dump_register(DEPCMD(9)),
330 dump_register(DEPCMD(10)),
331 dump_register(DEPCMD(11)),
332 dump_register(DEPCMD(12)),
333 dump_register(DEPCMD(13)),
334 dump_register(DEPCMD(14)),
335 dump_register(DEPCMD(15)),
336 dump_register(DEPCMD(16)),
337 dump_register(DEPCMD(17)),
338 dump_register(DEPCMD(18)),
339 dump_register(DEPCMD(19)),
340 dump_register(DEPCMD(20)),
341 dump_register(DEPCMD(21)),
342 dump_register(DEPCMD(22)),
343 dump_register(DEPCMD(23)),
344 dump_register(DEPCMD(24)),
345 dump_register(DEPCMD(25)),
346 dump_register(DEPCMD(26)),
347 dump_register(DEPCMD(27)),
348 dump_register(DEPCMD(28)),
349 dump_register(DEPCMD(29)),
350 dump_register(DEPCMD(30)),
351 dump_register(DEPCMD(31)),
352
353 dump_register(OCFG),
354 dump_register(OCTL),
355 dump_register(OEVT),
356 dump_register(OEVTEN),
357 dump_register(OSTS),
358 };
359
360 static int dwc3_mode_show(struct seq_file *s, void *unused)
361 {
362 struct dwc3 *dwc = s->private;
363 unsigned long flags;
364 u32 reg;
365
366 spin_lock_irqsave(&dwc->lock, flags);
367 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
368 spin_unlock_irqrestore(&dwc->lock, flags);
369
370 switch (DWC3_GCTL_PRTCAP(reg)) {
371 case DWC3_GCTL_PRTCAP_HOST:
372 seq_printf(s, "host\n");
373 break;
374 case DWC3_GCTL_PRTCAP_DEVICE:
375 seq_printf(s, "device\n");
376 break;
377 case DWC3_GCTL_PRTCAP_OTG:
378 seq_printf(s, "OTG\n");
379 break;
380 default:
381 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
382 }
383
384 return 0;
385 }
386
387 static int dwc3_mode_open(struct inode *inode, struct file *file)
388 {
389 return single_open(file, dwc3_mode_show, inode->i_private);
390 }
391
392 static ssize_t dwc3_mode_write(struct file *file,
393 const char __user *ubuf, size_t count, loff_t *ppos)
394 {
395 struct seq_file *s = file->private_data;
396 struct dwc3 *dwc = s->private;
397 unsigned long flags;
398 u32 mode = 0;
399 char buf[32];
400
401 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
402 return -EFAULT;
403
404 if (!strncmp(buf, "host", 4))
405 mode |= DWC3_GCTL_PRTCAP_HOST;
406
407 if (!strncmp(buf, "device", 6))
408 mode |= DWC3_GCTL_PRTCAP_DEVICE;
409
410 if (!strncmp(buf, "otg", 3))
411 mode |= DWC3_GCTL_PRTCAP_OTG;
412
413 if (mode) {
414 spin_lock_irqsave(&dwc->lock, flags);
415 dwc3_set_mode(dwc, mode);
416 spin_unlock_irqrestore(&dwc->lock, flags);
417 }
418 return count;
419 }
420
421 static const struct file_operations dwc3_mode_fops = {
422 .open = dwc3_mode_open,
423 .write = dwc3_mode_write,
424 .read = seq_read,
425 .llseek = seq_lseek,
426 .release = single_release,
427 };
428
429 static int dwc3_testmode_show(struct seq_file *s, void *unused)
430 {
431 struct dwc3 *dwc = s->private;
432 unsigned long flags;
433 u32 reg;
434
435 spin_lock_irqsave(&dwc->lock, flags);
436 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
437 reg &= DWC3_DCTL_TSTCTRL_MASK;
438 reg >>= 1;
439 spin_unlock_irqrestore(&dwc->lock, flags);
440
441 switch (reg) {
442 case 0:
443 seq_printf(s, "no test\n");
444 break;
445 case TEST_J:
446 seq_printf(s, "test_j\n");
447 break;
448 case TEST_K:
449 seq_printf(s, "test_k\n");
450 break;
451 case TEST_SE0_NAK:
452 seq_printf(s, "test_se0_nak\n");
453 break;
454 case TEST_PACKET:
455 seq_printf(s, "test_packet\n");
456 break;
457 case TEST_FORCE_EN:
458 seq_printf(s, "test_force_enable\n");
459 break;
460 default:
461 seq_printf(s, "UNKNOWN %d\n", reg);
462 }
463
464 return 0;
465 }
466
467 static int dwc3_testmode_open(struct inode *inode, struct file *file)
468 {
469 return single_open(file, dwc3_testmode_show, inode->i_private);
470 }
471
472 static ssize_t dwc3_testmode_write(struct file *file,
473 const char __user *ubuf, size_t count, loff_t *ppos)
474 {
475 struct seq_file *s = file->private_data;
476 struct dwc3 *dwc = s->private;
477 unsigned long flags;
478 u32 testmode = 0;
479 char buf[32];
480
481 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
482 return -EFAULT;
483
484 if (!strncmp(buf, "test_j", 6))
485 testmode = TEST_J;
486 else if (!strncmp(buf, "test_k", 6))
487 testmode = TEST_K;
488 else if (!strncmp(buf, "test_se0_nak", 12))
489 testmode = TEST_SE0_NAK;
490 else if (!strncmp(buf, "test_packet", 11))
491 testmode = TEST_PACKET;
492 else if (!strncmp(buf, "test_force_enable", 17))
493 testmode = TEST_FORCE_EN;
494 else
495 testmode = 0;
496
497 spin_lock_irqsave(&dwc->lock, flags);
498 dwc3_gadget_set_test_mode(dwc, testmode);
499 spin_unlock_irqrestore(&dwc->lock, flags);
500
501 return count;
502 }
503
504 static const struct file_operations dwc3_testmode_fops = {
505 .open = dwc3_testmode_open,
506 .write = dwc3_testmode_write,
507 .read = seq_read,
508 .llseek = seq_lseek,
509 .release = single_release,
510 };
511
512 static int dwc3_link_state_show(struct seq_file *s, void *unused)
513 {
514 struct dwc3 *dwc = s->private;
515 unsigned long flags;
516 enum dwc3_link_state state;
517 u32 reg;
518
519 spin_lock_irqsave(&dwc->lock, flags);
520 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
521 state = DWC3_DSTS_USBLNKST(reg);
522 spin_unlock_irqrestore(&dwc->lock, flags);
523
524 switch (state) {
525 case DWC3_LINK_STATE_U0:
526 seq_printf(s, "U0\n");
527 break;
528 case DWC3_LINK_STATE_U1:
529 seq_printf(s, "U1\n");
530 break;
531 case DWC3_LINK_STATE_U2:
532 seq_printf(s, "U2\n");
533 break;
534 case DWC3_LINK_STATE_U3:
535 seq_printf(s, "U3\n");
536 break;
537 case DWC3_LINK_STATE_SS_DIS:
538 seq_printf(s, "SS.Disabled\n");
539 break;
540 case DWC3_LINK_STATE_RX_DET:
541 seq_printf(s, "Rx.Detect\n");
542 break;
543 case DWC3_LINK_STATE_SS_INACT:
544 seq_printf(s, "SS.Inactive\n");
545 break;
546 case DWC3_LINK_STATE_POLL:
547 seq_printf(s, "Poll\n");
548 break;
549 case DWC3_LINK_STATE_RECOV:
550 seq_printf(s, "Recovery\n");
551 break;
552 case DWC3_LINK_STATE_HRESET:
553 seq_printf(s, "HRESET\n");
554 break;
555 case DWC3_LINK_STATE_CMPLY:
556 seq_printf(s, "Compliance\n");
557 break;
558 case DWC3_LINK_STATE_LPBK:
559 seq_printf(s, "Loopback\n");
560 break;
561 case DWC3_LINK_STATE_RESET:
562 seq_printf(s, "Reset\n");
563 break;
564 case DWC3_LINK_STATE_RESUME:
565 seq_printf(s, "Resume\n");
566 break;
567 default:
568 seq_printf(s, "UNKNOWN %d\n", state);
569 }
570
571 return 0;
572 }
573
574 static int dwc3_link_state_open(struct inode *inode, struct file *file)
575 {
576 return single_open(file, dwc3_link_state_show, inode->i_private);
577 }
578
579 static ssize_t dwc3_link_state_write(struct file *file,
580 const char __user *ubuf, size_t count, loff_t *ppos)
581 {
582 struct seq_file *s = file->private_data;
583 struct dwc3 *dwc = s->private;
584 unsigned long flags;
585 enum dwc3_link_state state = 0;
586 char buf[32];
587
588 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
589 return -EFAULT;
590
591 if (!strncmp(buf, "SS.Disabled", 11))
592 state = DWC3_LINK_STATE_SS_DIS;
593 else if (!strncmp(buf, "Rx.Detect", 9))
594 state = DWC3_LINK_STATE_RX_DET;
595 else if (!strncmp(buf, "SS.Inactive", 11))
596 state = DWC3_LINK_STATE_SS_INACT;
597 else if (!strncmp(buf, "Recovery", 8))
598 state = DWC3_LINK_STATE_RECOV;
599 else if (!strncmp(buf, "Compliance", 10))
600 state = DWC3_LINK_STATE_CMPLY;
601 else if (!strncmp(buf, "Loopback", 8))
602 state = DWC3_LINK_STATE_LPBK;
603 else
604 return -EINVAL;
605
606 spin_lock_irqsave(&dwc->lock, flags);
607 dwc3_gadget_set_link_state(dwc, state);
608 spin_unlock_irqrestore(&dwc->lock, flags);
609
610 return count;
611 }
612
613 static const struct file_operations dwc3_link_state_fops = {
614 .open = dwc3_link_state_open,
615 .write = dwc3_link_state_write,
616 .read = seq_read,
617 .llseek = seq_lseek,
618 .release = single_release,
619 };
620
621 int dwc3_debugfs_init(struct dwc3 *dwc)
622 {
623 struct dentry *root;
624 struct dentry *file;
625 int ret;
626
627 root = debugfs_create_dir(dev_name(dwc->dev), NULL);
628 if (!root) {
629 ret = -ENOMEM;
630 goto err0;
631 }
632
633 dwc->root = root;
634
635 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
636 if (!dwc->regset) {
637 ret = -ENOMEM;
638 goto err1;
639 }
640
641 dwc->regset->regs = dwc3_regs;
642 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
643 dwc->regset->base = dwc->regs;
644
645 file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
646 if (!file) {
647 ret = -ENOMEM;
648 goto err1;
649 }
650
651 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
652 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
653 dwc, &dwc3_mode_fops);
654 if (!file) {
655 ret = -ENOMEM;
656 goto err1;
657 }
658 }
659
660 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
661 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
662 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
663 dwc, &dwc3_testmode_fops);
664 if (!file) {
665 ret = -ENOMEM;
666 goto err1;
667 }
668
669 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
670 dwc, &dwc3_link_state_fops);
671 if (!file) {
672 ret = -ENOMEM;
673 goto err1;
674 }
675 }
676
677 return 0;
678
679 err1:
680 debugfs_remove_recursive(root);
681
682 err0:
683 return ret;
684 }
685
686 void dwc3_debugfs_exit(struct dwc3 *dwc)
687 {
688 debugfs_remove_recursive(dwc->root);
689 dwc->root = NULL;
690 }
Linux with added FPC-III support