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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
62static const 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(OEVT),
376 dump_register(OEVTEN),
377 dump_register(OSTS),
378};
379
380static int dwc3_mode_show(struct seq_file *s, void *unused)
381{
382 struct dwc3 *dwc = s->private;
383 unsigned long flags;
384 u32 reg;
385
386 spin_lock_irqsave(&dwc->lock, flags);
387 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
388 spin_unlock_irqrestore(&dwc->lock, flags);
389
390 switch (DWC3_GCTL_PRTCAP(reg)) {
391 case DWC3_GCTL_PRTCAP_HOST:
392 seq_printf(s, "host\n");
393 break;
394 case DWC3_GCTL_PRTCAP_DEVICE:
395 seq_printf(s, "device\n");
396 break;
397 case DWC3_GCTL_PRTCAP_OTG:
398 seq_printf(s, "OTG\n");
399 break;
400 default:
401 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
402 }
403
404 return 0;
405}
406
407static int dwc3_mode_open(struct inode *inode, struct file *file)
408{
409 return single_open(file, dwc3_mode_show, inode->i_private);
410}
411
412static ssize_t dwc3_mode_write(struct file *file,
413 const char __user *ubuf, size_t count, loff_t *ppos)
414{
415 struct seq_file *s = file->private_data;
416 struct dwc3 *dwc = s->private;
417 unsigned long flags;
418 u32 mode = 0;
419 char buf[32];
420
421 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
422 return -EFAULT;
423
424 if (!strncmp(buf, "host", 4))
425 mode |= DWC3_GCTL_PRTCAP_HOST;
426
427 if (!strncmp(buf, "device", 6))
428 mode |= DWC3_GCTL_PRTCAP_DEVICE;
429
430 if (!strncmp(buf, "otg", 3))
431 mode |= DWC3_GCTL_PRTCAP_OTG;
432
433 if (mode) {
434 spin_lock_irqsave(&dwc->lock, flags);
435 dwc3_set_mode(dwc, mode);
436 spin_unlock_irqrestore(&dwc->lock, flags);
437 }
438 return count;
439}
440
441static const struct file_operations dwc3_mode_fops = {
442 .open = dwc3_mode_open,
443 .write = dwc3_mode_write,
444 .read = seq_read,
445 .llseek = seq_lseek,
446 .release = single_release,
447};
448
449static int dwc3_testmode_show(struct seq_file *s, void *unused)
450{
451 struct dwc3 *dwc = s->private;
452 unsigned long flags;
453 u32 reg;
454
455 spin_lock_irqsave(&dwc->lock, flags);
456 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
457 reg &= DWC3_DCTL_TSTCTRL_MASK;
458 reg >>= 1;
459 spin_unlock_irqrestore(&dwc->lock, flags);
460
461 switch (reg) {
462 case 0:
463 seq_printf(s, "no test\n");
464 break;
465 case TEST_J:
466 seq_printf(s, "test_j\n");
467 break;
468 case TEST_K:
469 seq_printf(s, "test_k\n");
470 break;
471 case TEST_SE0_NAK:
472 seq_printf(s, "test_se0_nak\n");
473 break;
474 case TEST_PACKET:
475 seq_printf(s, "test_packet\n");
476 break;
477 case TEST_FORCE_EN:
478 seq_printf(s, "test_force_enable\n");
479 break;
480 default:
481 seq_printf(s, "UNKNOWN %d\n", reg);
482 }
483
484 return 0;
485}
486
487static int dwc3_testmode_open(struct inode *inode, struct file *file)
488{
489 return single_open(file, dwc3_testmode_show, inode->i_private);
490}
491
492static ssize_t dwc3_testmode_write(struct file *file,
493 const char __user *ubuf, size_t count, loff_t *ppos)
494{
495 struct seq_file *s = file->private_data;
496 struct dwc3 *dwc = s->private;
497 unsigned long flags;
498 u32 testmode = 0;
499 char buf[32];
500
501 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
502 return -EFAULT;
503
504 if (!strncmp(buf, "test_j", 6))
505 testmode = TEST_J;
506 else if (!strncmp(buf, "test_k", 6))
507 testmode = TEST_K;
508 else if (!strncmp(buf, "test_se0_nak", 12))
509 testmode = TEST_SE0_NAK;
510 else if (!strncmp(buf, "test_packet", 11))
511 testmode = TEST_PACKET;
512 else if (!strncmp(buf, "test_force_enable", 17))
513 testmode = TEST_FORCE_EN;
514 else
515 testmode = 0;
516
517 spin_lock_irqsave(&dwc->lock, flags);
518 dwc3_gadget_set_test_mode(dwc, testmode);
519 spin_unlock_irqrestore(&dwc->lock, flags);
520
521 return count;
522}
523
524static const struct file_operations dwc3_testmode_fops = {
525 .open = dwc3_testmode_open,
526 .write = dwc3_testmode_write,
527 .read = seq_read,
528 .llseek = seq_lseek,
529 .release = single_release,
530};
531
532static int dwc3_link_state_show(struct seq_file *s, void *unused)
533{
534 struct dwc3 *dwc = s->private;
535 unsigned long flags;
536 enum dwc3_link_state state;
537 u32 reg;
538
539 spin_lock_irqsave(&dwc->lock, flags);
540 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
541 state = DWC3_DSTS_USBLNKST(reg);
542 spin_unlock_irqrestore(&dwc->lock, flags);
543
544 switch (state) {
545 case DWC3_LINK_STATE_U0:
546 seq_printf(s, "U0\n");
547 break;
548 case DWC3_LINK_STATE_U1:
549 seq_printf(s, "U1\n");
550 break;
551 case DWC3_LINK_STATE_U2:
552 seq_printf(s, "U2\n");
553 break;
554 case DWC3_LINK_STATE_U3:
555 seq_printf(s, "U3\n");
556 break;
557 case DWC3_LINK_STATE_SS_DIS:
558 seq_printf(s, "SS.Disabled\n");
559 break;
560 case DWC3_LINK_STATE_RX_DET:
561 seq_printf(s, "Rx.Detect\n");
562 break;
563 case DWC3_LINK_STATE_SS_INACT:
564 seq_printf(s, "SS.Inactive\n");
565 break;
566 case DWC3_LINK_STATE_POLL:
567 seq_printf(s, "Poll\n");
568 break;
569 case DWC3_LINK_STATE_RECOV:
570 seq_printf(s, "Recovery\n");
571 break;
572 case DWC3_LINK_STATE_HRESET:
573 seq_printf(s, "HRESET\n");
574 break;
575 case DWC3_LINK_STATE_CMPLY:
576 seq_printf(s, "Compliance\n");
577 break;
578 case DWC3_LINK_STATE_LPBK:
579 seq_printf(s, "Loopback\n");
580 break;
581 case DWC3_LINK_STATE_RESET:
582 seq_printf(s, "Reset\n");
583 break;
584 case DWC3_LINK_STATE_RESUME:
585 seq_printf(s, "Resume\n");
586 break;
587 default:
588 seq_printf(s, "UNKNOWN %d\n", state);
589 }
590
591 return 0;
592}
593
594static int dwc3_link_state_open(struct inode *inode, struct file *file)
595{
596 return single_open(file, dwc3_link_state_show, inode->i_private);
597}
598
599static ssize_t dwc3_link_state_write(struct file *file,
600 const char __user *ubuf, size_t count, loff_t *ppos)
601{
602 struct seq_file *s = file->private_data;
603 struct dwc3 *dwc = s->private;
604 unsigned long flags;
605 enum dwc3_link_state state = 0;
606 char buf[32];
607
608 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
609 return -EFAULT;
610
611 if (!strncmp(buf, "SS.Disabled", 11))
612 state = DWC3_LINK_STATE_SS_DIS;
613 else if (!strncmp(buf, "Rx.Detect", 9))
614 state = DWC3_LINK_STATE_RX_DET;
615 else if (!strncmp(buf, "SS.Inactive", 11))
616 state = DWC3_LINK_STATE_SS_INACT;
617 else if (!strncmp(buf, "Recovery", 8))
618 state = DWC3_LINK_STATE_RECOV;
619 else if (!strncmp(buf, "Compliance", 10))
620 state = DWC3_LINK_STATE_CMPLY;
621 else if (!strncmp(buf, "Loopback", 8))
622 state = DWC3_LINK_STATE_LPBK;
623 else
624 return -EINVAL;
625
626 spin_lock_irqsave(&dwc->lock, flags);
627 dwc3_gadget_set_link_state(dwc, state);
628 spin_unlock_irqrestore(&dwc->lock, flags);
629
630 return count;
631}
632
633static const struct file_operations dwc3_link_state_fops = {
634 .open = dwc3_link_state_open,
635 .write = dwc3_link_state_write,
636 .read = seq_read,
637 .llseek = seq_lseek,
638 .release = single_release,
639};
640
641int dwc3_debugfs_init(struct dwc3 *dwc)
642{
643 struct dentry *root;
644 struct dentry *file;
645 int ret;
646
647 root = debugfs_create_dir(dev_name(dwc->dev), NULL);
648 if (!root) {
649 ret = -ENOMEM;
650 goto err0;
651 }
652
653 dwc->root = root;
654
655 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
656 if (!dwc->regset) {
657 ret = -ENOMEM;
658 goto err1;
659 }
660
661 dwc->regset->regs = dwc3_regs;
662 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
663 dwc->regset->base = dwc->regs;
664
665 file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
666 if (!file) {
667 ret = -ENOMEM;
668 goto err1;
669 }
670
671 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
672 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
673 dwc, &dwc3_mode_fops);
674 if (!file) {
675 ret = -ENOMEM;
676 goto err1;
677 }
678 }
679
680 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
681 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
682 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
683 dwc, &dwc3_testmode_fops);
684 if (!file) {
685 ret = -ENOMEM;
686 goto err1;
687 }
688
689 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
690 dwc, &dwc3_link_state_fops);
691 if (!file) {
692 ret = -ENOMEM;
693 goto err1;
694 }
695 }
696
697 return 0;
698
699err1:
700 debugfs_remove_recursive(root);
701
702err0:
703 return ret;
704}
705
706void dwc3_debugfs_exit(struct dwc3 *dwc)
707{
708 debugfs_remove_recursive(dwc->root);
709 dwc->root = NULL;
710}
711
