xref: /openbmc/linux/drivers/usb/dwc3/debugfs.c (revision 930c429a) 
1 // SPDX-License-Identifier: GPL-2.0
2 /**
3  * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
4  *
5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
6  *
7  * Authors: Felipe Balbi <balbi@ti.com>,
8  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9  */
10 
11 #include <linux/kernel.h>
12 #include <linux/slab.h>
13 #include <linux/ptrace.h>
14 #include <linux/types.h>
15 #include <linux/spinlock.h>
16 #include <linux/debugfs.h>
17 #include <linux/seq_file.h>
18 #include <linux/delay.h>
19 #include <linux/uaccess.h>
20 
21 #include <linux/usb/ch9.h>
22 
23 #include "core.h"
24 #include "gadget.h"
25 #include "io.h"
26 #include "debug.h"
27 
28 #define dump_register(nm)				\
29 {							\
30 	.name	= __stringify(nm),			\
31 	.offset	= DWC3_ ##nm,				\
32 }
33 
34 #define dump_ep_register_set(n)			\
35 	{					\
36 		.name = "DEPCMDPAR2("__stringify(n)")",	\
37 		.offset = DWC3_DEP_BASE(n) +	\
38 			DWC3_DEPCMDPAR2,	\
39 	},					\
40 	{					\
41 		.name = "DEPCMDPAR1("__stringify(n)")",	\
42 		.offset = DWC3_DEP_BASE(n) +	\
43 			DWC3_DEPCMDPAR1,	\
44 	},					\
45 	{					\
46 		.name = "DEPCMDPAR0("__stringify(n)")",	\
47 		.offset = DWC3_DEP_BASE(n) +	\
48 			DWC3_DEPCMDPAR0,	\
49 	},					\
50 	{					\
51 		.name = "DEPCMD("__stringify(n)")",	\
52 		.offset = DWC3_DEP_BASE(n) +	\
53 			DWC3_DEPCMD,		\
54 	}
55 
56 
57 static const struct debugfs_reg32 dwc3_regs[] = {
58 	dump_register(GSBUSCFG0),
59 	dump_register(GSBUSCFG1),
60 	dump_register(GTXTHRCFG),
61 	dump_register(GRXTHRCFG),
62 	dump_register(GCTL),
63 	dump_register(GEVTEN),
64 	dump_register(GSTS),
65 	dump_register(GUCTL1),
66 	dump_register(GSNPSID),
67 	dump_register(GGPIO),
68 	dump_register(GUID),
69 	dump_register(GUCTL),
70 	dump_register(GBUSERRADDR0),
71 	dump_register(GBUSERRADDR1),
72 	dump_register(GPRTBIMAP0),
73 	dump_register(GPRTBIMAP1),
74 	dump_register(GHWPARAMS0),
75 	dump_register(GHWPARAMS1),
76 	dump_register(GHWPARAMS2),
77 	dump_register(GHWPARAMS3),
78 	dump_register(GHWPARAMS4),
79 	dump_register(GHWPARAMS5),
80 	dump_register(GHWPARAMS6),
81 	dump_register(GHWPARAMS7),
82 	dump_register(GDBGFIFOSPACE),
83 	dump_register(GDBGLTSSM),
84 	dump_register(GPRTBIMAP_HS0),
85 	dump_register(GPRTBIMAP_HS1),
86 	dump_register(GPRTBIMAP_FS0),
87 	dump_register(GPRTBIMAP_FS1),
88 
89 	dump_register(GUSB2PHYCFG(0)),
90 	dump_register(GUSB2PHYCFG(1)),
91 	dump_register(GUSB2PHYCFG(2)),
92 	dump_register(GUSB2PHYCFG(3)),
93 	dump_register(GUSB2PHYCFG(4)),
94 	dump_register(GUSB2PHYCFG(5)),
95 	dump_register(GUSB2PHYCFG(6)),
96 	dump_register(GUSB2PHYCFG(7)),
97 	dump_register(GUSB2PHYCFG(8)),
98 	dump_register(GUSB2PHYCFG(9)),
99 	dump_register(GUSB2PHYCFG(10)),
100 	dump_register(GUSB2PHYCFG(11)),
101 	dump_register(GUSB2PHYCFG(12)),
102 	dump_register(GUSB2PHYCFG(13)),
103 	dump_register(GUSB2PHYCFG(14)),
104 	dump_register(GUSB2PHYCFG(15)),
105 
106 	dump_register(GUSB2I2CCTL(0)),
107 	dump_register(GUSB2I2CCTL(1)),
108 	dump_register(GUSB2I2CCTL(2)),
109 	dump_register(GUSB2I2CCTL(3)),
110 	dump_register(GUSB2I2CCTL(4)),
111 	dump_register(GUSB2I2CCTL(5)),
112 	dump_register(GUSB2I2CCTL(6)),
113 	dump_register(GUSB2I2CCTL(7)),
114 	dump_register(GUSB2I2CCTL(8)),
115 	dump_register(GUSB2I2CCTL(9)),
116 	dump_register(GUSB2I2CCTL(10)),
117 	dump_register(GUSB2I2CCTL(11)),
118 	dump_register(GUSB2I2CCTL(12)),
119 	dump_register(GUSB2I2CCTL(13)),
120 	dump_register(GUSB2I2CCTL(14)),
121 	dump_register(GUSB2I2CCTL(15)),
122 
123 	dump_register(GUSB2PHYACC(0)),
124 	dump_register(GUSB2PHYACC(1)),
125 	dump_register(GUSB2PHYACC(2)),
126 	dump_register(GUSB2PHYACC(3)),
127 	dump_register(GUSB2PHYACC(4)),
128 	dump_register(GUSB2PHYACC(5)),
129 	dump_register(GUSB2PHYACC(6)),
130 	dump_register(GUSB2PHYACC(7)),
131 	dump_register(GUSB2PHYACC(8)),
132 	dump_register(GUSB2PHYACC(9)),
133 	dump_register(GUSB2PHYACC(10)),
134 	dump_register(GUSB2PHYACC(11)),
135 	dump_register(GUSB2PHYACC(12)),
136 	dump_register(GUSB2PHYACC(13)),
137 	dump_register(GUSB2PHYACC(14)),
138 	dump_register(GUSB2PHYACC(15)),
139 
140 	dump_register(GUSB3PIPECTL(0)),
141 	dump_register(GUSB3PIPECTL(1)),
142 	dump_register(GUSB3PIPECTL(2)),
143 	dump_register(GUSB3PIPECTL(3)),
144 	dump_register(GUSB3PIPECTL(4)),
145 	dump_register(GUSB3PIPECTL(5)),
146 	dump_register(GUSB3PIPECTL(6)),
147 	dump_register(GUSB3PIPECTL(7)),
148 	dump_register(GUSB3PIPECTL(8)),
149 	dump_register(GUSB3PIPECTL(9)),
150 	dump_register(GUSB3PIPECTL(10)),
151 	dump_register(GUSB3PIPECTL(11)),
152 	dump_register(GUSB3PIPECTL(12)),
153 	dump_register(GUSB3PIPECTL(13)),
154 	dump_register(GUSB3PIPECTL(14)),
155 	dump_register(GUSB3PIPECTL(15)),
156 
157 	dump_register(GTXFIFOSIZ(0)),
158 	dump_register(GTXFIFOSIZ(1)),
159 	dump_register(GTXFIFOSIZ(2)),
160 	dump_register(GTXFIFOSIZ(3)),
161 	dump_register(GTXFIFOSIZ(4)),
162 	dump_register(GTXFIFOSIZ(5)),
163 	dump_register(GTXFIFOSIZ(6)),
164 	dump_register(GTXFIFOSIZ(7)),
165 	dump_register(GTXFIFOSIZ(8)),
166 	dump_register(GTXFIFOSIZ(9)),
167 	dump_register(GTXFIFOSIZ(10)),
168 	dump_register(GTXFIFOSIZ(11)),
169 	dump_register(GTXFIFOSIZ(12)),
170 	dump_register(GTXFIFOSIZ(13)),
171 	dump_register(GTXFIFOSIZ(14)),
172 	dump_register(GTXFIFOSIZ(15)),
173 	dump_register(GTXFIFOSIZ(16)),
174 	dump_register(GTXFIFOSIZ(17)),
175 	dump_register(GTXFIFOSIZ(18)),
176 	dump_register(GTXFIFOSIZ(19)),
177 	dump_register(GTXFIFOSIZ(20)),
178 	dump_register(GTXFIFOSIZ(21)),
179 	dump_register(GTXFIFOSIZ(22)),
180 	dump_register(GTXFIFOSIZ(23)),
181 	dump_register(GTXFIFOSIZ(24)),
182 	dump_register(GTXFIFOSIZ(25)),
183 	dump_register(GTXFIFOSIZ(26)),
184 	dump_register(GTXFIFOSIZ(27)),
185 	dump_register(GTXFIFOSIZ(28)),
186 	dump_register(GTXFIFOSIZ(29)),
187 	dump_register(GTXFIFOSIZ(30)),
188 	dump_register(GTXFIFOSIZ(31)),
189 
190 	dump_register(GRXFIFOSIZ(0)),
191 	dump_register(GRXFIFOSIZ(1)),
192 	dump_register(GRXFIFOSIZ(2)),
193 	dump_register(GRXFIFOSIZ(3)),
194 	dump_register(GRXFIFOSIZ(4)),
195 	dump_register(GRXFIFOSIZ(5)),
196 	dump_register(GRXFIFOSIZ(6)),
197 	dump_register(GRXFIFOSIZ(7)),
198 	dump_register(GRXFIFOSIZ(8)),
199 	dump_register(GRXFIFOSIZ(9)),
200 	dump_register(GRXFIFOSIZ(10)),
201 	dump_register(GRXFIFOSIZ(11)),
202 	dump_register(GRXFIFOSIZ(12)),
203 	dump_register(GRXFIFOSIZ(13)),
204 	dump_register(GRXFIFOSIZ(14)),
205 	dump_register(GRXFIFOSIZ(15)),
206 	dump_register(GRXFIFOSIZ(16)),
207 	dump_register(GRXFIFOSIZ(17)),
208 	dump_register(GRXFIFOSIZ(18)),
209 	dump_register(GRXFIFOSIZ(19)),
210 	dump_register(GRXFIFOSIZ(20)),
211 	dump_register(GRXFIFOSIZ(21)),
212 	dump_register(GRXFIFOSIZ(22)),
213 	dump_register(GRXFIFOSIZ(23)),
214 	dump_register(GRXFIFOSIZ(24)),
215 	dump_register(GRXFIFOSIZ(25)),
216 	dump_register(GRXFIFOSIZ(26)),
217 	dump_register(GRXFIFOSIZ(27)),
218 	dump_register(GRXFIFOSIZ(28)),
219 	dump_register(GRXFIFOSIZ(29)),
220 	dump_register(GRXFIFOSIZ(30)),
221 	dump_register(GRXFIFOSIZ(31)),
222 
223 	dump_register(GEVNTADRLO(0)),
224 	dump_register(GEVNTADRHI(0)),
225 	dump_register(GEVNTSIZ(0)),
226 	dump_register(GEVNTCOUNT(0)),
227 
228 	dump_register(GHWPARAMS8),
229 	dump_register(DCFG),
230 	dump_register(DCTL),
231 	dump_register(DEVTEN),
232 	dump_register(DSTS),
233 	dump_register(DGCMDPAR),
234 	dump_register(DGCMD),
235 	dump_register(DALEPENA),
236 
237 	dump_ep_register_set(0),
238 	dump_ep_register_set(1),
239 	dump_ep_register_set(2),
240 	dump_ep_register_set(3),
241 	dump_ep_register_set(4),
242 	dump_ep_register_set(5),
243 	dump_ep_register_set(6),
244 	dump_ep_register_set(7),
245 	dump_ep_register_set(8),
246 	dump_ep_register_set(9),
247 	dump_ep_register_set(10),
248 	dump_ep_register_set(11),
249 	dump_ep_register_set(12),
250 	dump_ep_register_set(13),
251 	dump_ep_register_set(14),
252 	dump_ep_register_set(15),
253 	dump_ep_register_set(16),
254 	dump_ep_register_set(17),
255 	dump_ep_register_set(18),
256 	dump_ep_register_set(19),
257 	dump_ep_register_set(20),
258 	dump_ep_register_set(21),
259 	dump_ep_register_set(22),
260 	dump_ep_register_set(23),
261 	dump_ep_register_set(24),
262 	dump_ep_register_set(25),
263 	dump_ep_register_set(26),
264 	dump_ep_register_set(27),
265 	dump_ep_register_set(28),
266 	dump_ep_register_set(29),
267 	dump_ep_register_set(30),
268 	dump_ep_register_set(31),
269 
270 	dump_register(OCFG),
271 	dump_register(OCTL),
272 	dump_register(OEVT),
273 	dump_register(OEVTEN),
274 	dump_register(OSTS),
275 };
276 
277 static int dwc3_mode_show(struct seq_file *s, void *unused)
278 {
279 	struct dwc3		*dwc = s->private;
280 	unsigned long		flags;
281 	u32			reg;
282 
283 	spin_lock_irqsave(&dwc->lock, flags);
284 	reg = dwc3_readl(dwc->regs, DWC3_GCTL);
285 	spin_unlock_irqrestore(&dwc->lock, flags);
286 
287 	switch (DWC3_GCTL_PRTCAP(reg)) {
288 	case DWC3_GCTL_PRTCAP_HOST:
289 		seq_printf(s, "host\n");
290 		break;
291 	case DWC3_GCTL_PRTCAP_DEVICE:
292 		seq_printf(s, "device\n");
293 		break;
294 	case DWC3_GCTL_PRTCAP_OTG:
295 		seq_printf(s, "otg\n");
296 		break;
297 	default:
298 		seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
299 	}
300 
301 	return 0;
302 }
303 
304 static int dwc3_mode_open(struct inode *inode, struct file *file)
305 {
306 	return single_open(file, dwc3_mode_show, inode->i_private);
307 }
308 
309 static ssize_t dwc3_mode_write(struct file *file,
310 		const char __user *ubuf, size_t count, loff_t *ppos)
311 {
312 	struct seq_file		*s = file->private_data;
313 	struct dwc3		*dwc = s->private;
314 	u32			mode = 0;
315 	char			buf[32];
316 
317 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
318 		return -EFAULT;
319 
320 	if (!strncmp(buf, "host", 4))
321 		mode = DWC3_GCTL_PRTCAP_HOST;
322 
323 	if (!strncmp(buf, "device", 6))
324 		mode = DWC3_GCTL_PRTCAP_DEVICE;
325 
326 	if (!strncmp(buf, "otg", 3))
327 		mode = DWC3_GCTL_PRTCAP_OTG;
328 
329 	dwc3_set_mode(dwc, mode);
330 
331 	return count;
332 }
333 
334 static const struct file_operations dwc3_mode_fops = {
335 	.open			= dwc3_mode_open,
336 	.write			= dwc3_mode_write,
337 	.read			= seq_read,
338 	.llseek			= seq_lseek,
339 	.release		= single_release,
340 };
341 
342 static int dwc3_testmode_show(struct seq_file *s, void *unused)
343 {
344 	struct dwc3		*dwc = s->private;
345 	unsigned long		flags;
346 	u32			reg;
347 
348 	spin_lock_irqsave(&dwc->lock, flags);
349 	reg = dwc3_readl(dwc->regs, DWC3_DCTL);
350 	reg &= DWC3_DCTL_TSTCTRL_MASK;
351 	reg >>= 1;
352 	spin_unlock_irqrestore(&dwc->lock, flags);
353 
354 	switch (reg) {
355 	case 0:
356 		seq_printf(s, "no test\n");
357 		break;
358 	case TEST_J:
359 		seq_printf(s, "test_j\n");
360 		break;
361 	case TEST_K:
362 		seq_printf(s, "test_k\n");
363 		break;
364 	case TEST_SE0_NAK:
365 		seq_printf(s, "test_se0_nak\n");
366 		break;
367 	case TEST_PACKET:
368 		seq_printf(s, "test_packet\n");
369 		break;
370 	case TEST_FORCE_EN:
371 		seq_printf(s, "test_force_enable\n");
372 		break;
373 	default:
374 		seq_printf(s, "UNKNOWN %d\n", reg);
375 	}
376 
377 	return 0;
378 }
379 
380 static int dwc3_testmode_open(struct inode *inode, struct file *file)
381 {
382 	return single_open(file, dwc3_testmode_show, inode->i_private);
383 }
384 
385 static ssize_t dwc3_testmode_write(struct file *file,
386 		const char __user *ubuf, size_t count, loff_t *ppos)
387 {
388 	struct seq_file		*s = file->private_data;
389 	struct dwc3		*dwc = s->private;
390 	unsigned long		flags;
391 	u32			testmode = 0;
392 	char			buf[32];
393 
394 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
395 		return -EFAULT;
396 
397 	if (!strncmp(buf, "test_j", 6))
398 		testmode = TEST_J;
399 	else if (!strncmp(buf, "test_k", 6))
400 		testmode = TEST_K;
401 	else if (!strncmp(buf, "test_se0_nak", 12))
402 		testmode = TEST_SE0_NAK;
403 	else if (!strncmp(buf, "test_packet", 11))
404 		testmode = TEST_PACKET;
405 	else if (!strncmp(buf, "test_force_enable", 17))
406 		testmode = TEST_FORCE_EN;
407 	else
408 		testmode = 0;
409 
410 	spin_lock_irqsave(&dwc->lock, flags);
411 	dwc3_gadget_set_test_mode(dwc, testmode);
412 	spin_unlock_irqrestore(&dwc->lock, flags);
413 
414 	return count;
415 }
416 
417 static const struct file_operations dwc3_testmode_fops = {
418 	.open			= dwc3_testmode_open,
419 	.write			= dwc3_testmode_write,
420 	.read			= seq_read,
421 	.llseek			= seq_lseek,
422 	.release		= single_release,
423 };
424 
425 static int dwc3_link_state_show(struct seq_file *s, void *unused)
426 {
427 	struct dwc3		*dwc = s->private;
428 	unsigned long		flags;
429 	enum dwc3_link_state	state;
430 	u32			reg;
431 
432 	spin_lock_irqsave(&dwc->lock, flags);
433 	reg = dwc3_readl(dwc->regs, DWC3_DSTS);
434 	state = DWC3_DSTS_USBLNKST(reg);
435 	spin_unlock_irqrestore(&dwc->lock, flags);
436 
437 	seq_printf(s, "%s\n", dwc3_gadget_link_string(state));
438 
439 	return 0;
440 }
441 
442 static int dwc3_link_state_open(struct inode *inode, struct file *file)
443 {
444 	return single_open(file, dwc3_link_state_show, inode->i_private);
445 }
446 
447 static ssize_t dwc3_link_state_write(struct file *file,
448 		const char __user *ubuf, size_t count, loff_t *ppos)
449 {
450 	struct seq_file		*s = file->private_data;
451 	struct dwc3		*dwc = s->private;
452 	unsigned long		flags;
453 	enum dwc3_link_state	state = 0;
454 	char			buf[32];
455 
456 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
457 		return -EFAULT;
458 
459 	if (!strncmp(buf, "SS.Disabled", 11))
460 		state = DWC3_LINK_STATE_SS_DIS;
461 	else if (!strncmp(buf, "Rx.Detect", 9))
462 		state = DWC3_LINK_STATE_RX_DET;
463 	else if (!strncmp(buf, "SS.Inactive", 11))
464 		state = DWC3_LINK_STATE_SS_INACT;
465 	else if (!strncmp(buf, "Recovery", 8))
466 		state = DWC3_LINK_STATE_RECOV;
467 	else if (!strncmp(buf, "Compliance", 10))
468 		state = DWC3_LINK_STATE_CMPLY;
469 	else if (!strncmp(buf, "Loopback", 8))
470 		state = DWC3_LINK_STATE_LPBK;
471 	else
472 		return -EINVAL;
473 
474 	spin_lock_irqsave(&dwc->lock, flags);
475 	dwc3_gadget_set_link_state(dwc, state);
476 	spin_unlock_irqrestore(&dwc->lock, flags);
477 
478 	return count;
479 }
480 
481 static const struct file_operations dwc3_link_state_fops = {
482 	.open			= dwc3_link_state_open,
483 	.write			= dwc3_link_state_write,
484 	.read			= seq_read,
485 	.llseek			= seq_lseek,
486 	.release		= single_release,
487 };
488 
489 struct dwc3_ep_file_map {
490 	char name[25];
491 	int (*show)(struct seq_file *s, void *unused);
492 };
493 
494 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
495 {
496 	struct dwc3_ep		*dep = s->private;
497 	struct dwc3		*dwc = dep->dwc;
498 	unsigned long		flags;
499 	u32			val;
500 
501 	spin_lock_irqsave(&dwc->lock, flags);
502 	val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
503 	seq_printf(s, "%u\n", val);
504 	spin_unlock_irqrestore(&dwc->lock, flags);
505 
506 	return 0;
507 }
508 
509 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
510 {
511 	struct dwc3_ep		*dep = s->private;
512 	struct dwc3		*dwc = dep->dwc;
513 	unsigned long		flags;
514 	u32			val;
515 
516 	spin_lock_irqsave(&dwc->lock, flags);
517 	val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
518 	seq_printf(s, "%u\n", val);
519 	spin_unlock_irqrestore(&dwc->lock, flags);
520 
521 	return 0;
522 }
523 
524 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
525 {
526 	struct dwc3_ep		*dep = s->private;
527 	struct dwc3		*dwc = dep->dwc;
528 	unsigned long		flags;
529 	u32			val;
530 
531 	spin_lock_irqsave(&dwc->lock, flags);
532 	val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
533 	seq_printf(s, "%u\n", val);
534 	spin_unlock_irqrestore(&dwc->lock, flags);
535 
536 	return 0;
537 }
538 
539 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
540 {
541 	struct dwc3_ep		*dep = s->private;
542 	struct dwc3		*dwc = dep->dwc;
543 	unsigned long		flags;
544 	u32			val;
545 
546 	spin_lock_irqsave(&dwc->lock, flags);
547 	val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
548 	seq_printf(s, "%u\n", val);
549 	spin_unlock_irqrestore(&dwc->lock, flags);
550 
551 	return 0;
552 }
553 
554 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
555 {
556 	struct dwc3_ep		*dep = s->private;
557 	struct dwc3		*dwc = dep->dwc;
558 	unsigned long		flags;
559 	u32			val;
560 
561 	spin_lock_irqsave(&dwc->lock, flags);
562 	val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
563 	seq_printf(s, "%u\n", val);
564 	spin_unlock_irqrestore(&dwc->lock, flags);
565 
566 	return 0;
567 }
568 
569 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
570 {
571 	struct dwc3_ep		*dep = s->private;
572 	struct dwc3		*dwc = dep->dwc;
573 	unsigned long		flags;
574 	u32			val;
575 
576 	spin_lock_irqsave(&dwc->lock, flags);
577 	val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
578 	seq_printf(s, "%u\n", val);
579 	spin_unlock_irqrestore(&dwc->lock, flags);
580 
581 	return 0;
582 }
583 
584 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
585 {
586 	struct dwc3_ep		*dep = s->private;
587 	struct dwc3		*dwc = dep->dwc;
588 	unsigned long		flags;
589 	u32			val;
590 
591 	spin_lock_irqsave(&dwc->lock, flags);
592 	val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
593 	seq_printf(s, "%u\n", val);
594 	spin_unlock_irqrestore(&dwc->lock, flags);
595 
596 	return 0;
597 }
598 
599 static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused)
600 {
601 	struct dwc3_ep		*dep = s->private;
602 	struct dwc3		*dwc = dep->dwc;
603 	unsigned long		flags;
604 
605 	spin_lock_irqsave(&dwc->lock, flags);
606 	if (!(dep->flags & DWC3_EP_ENABLED) ||
607 			!dep->endpoint.desc) {
608 		seq_printf(s, "--\n");
609 		goto out;
610 	}
611 
612 	switch (usb_endpoint_type(dep->endpoint.desc)) {
613 	case USB_ENDPOINT_XFER_CONTROL:
614 		seq_printf(s, "control\n");
615 		break;
616 	case USB_ENDPOINT_XFER_ISOC:
617 		seq_printf(s, "isochronous\n");
618 		break;
619 	case USB_ENDPOINT_XFER_BULK:
620 		seq_printf(s, "bulk\n");
621 		break;
622 	case USB_ENDPOINT_XFER_INT:
623 		seq_printf(s, "interrupt\n");
624 		break;
625 	default:
626 		seq_printf(s, "--\n");
627 	}
628 
629 out:
630 	spin_unlock_irqrestore(&dwc->lock, flags);
631 
632 	return 0;
633 }
634 
635 static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused)
636 {
637 	struct dwc3_ep		*dep = s->private;
638 	struct dwc3		*dwc = dep->dwc;
639 	unsigned long		flags;
640 	int			i;
641 
642 	spin_lock_irqsave(&dwc->lock, flags);
643 	if (dep->number <= 1) {
644 		seq_printf(s, "--\n");
645 		goto out;
646 	}
647 
648 	seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
649 
650 	for (i = 0; i < DWC3_TRB_NUM; i++) {
651 		struct dwc3_trb *trb = &dep->trb_pool[i];
652 		unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
653 
654 		seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d       %c%c\n",
655 				trb->bph, trb->bpl, trb->size,
656 				dwc3_trb_type_string(type),
657 				!!(trb->ctrl & DWC3_TRB_CTRL_IOC),
658 				!!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
659 				!!(trb->ctrl & DWC3_TRB_CTRL_CSP),
660 				!!(trb->ctrl & DWC3_TRB_CTRL_CHN),
661 				!!(trb->ctrl & DWC3_TRB_CTRL_LST),
662 				!!(trb->ctrl & DWC3_TRB_CTRL_HWO),
663 				dep->trb_enqueue == i ? 'E' : ' ',
664 				dep->trb_dequeue == i ? 'D' : ' ');
665 	}
666 
667 out:
668 	spin_unlock_irqrestore(&dwc->lock, flags);
669 
670 	return 0;
671 }
672 
673 static struct dwc3_ep_file_map map[] = {
674 	{ "tx_fifo_queue", dwc3_tx_fifo_queue_show, },
675 	{ "rx_fifo_queue", dwc3_rx_fifo_queue_show, },
676 	{ "tx_request_queue", dwc3_tx_request_queue_show, },
677 	{ "rx_request_queue", dwc3_rx_request_queue_show, },
678 	{ "rx_info_queue", dwc3_rx_info_queue_show, },
679 	{ "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, },
680 	{ "event_queue", dwc3_event_queue_show, },
681 	{ "transfer_type", dwc3_ep_transfer_type_show, },
682 	{ "trb_ring", dwc3_ep_trb_ring_show, },
683 };
684 
685 static int dwc3_endpoint_open(struct inode *inode, struct file *file)
686 {
687 	const char		*file_name = file_dentry(file)->d_iname;
688 	struct dwc3_ep_file_map	*f_map;
689 	int			i;
690 
691 	for (i = 0; i < ARRAY_SIZE(map); i++) {
692 		f_map = &map[i];
693 
694 		if (strcmp(f_map->name, file_name) == 0)
695 			break;
696 	}
697 
698 	return single_open(file, f_map->show, inode->i_private);
699 }
700 
701 static const struct file_operations dwc3_endpoint_fops = {
702 	.open			= dwc3_endpoint_open,
703 	.read			= seq_read,
704 	.llseek			= seq_lseek,
705 	.release		= single_release,
706 };
707 
708 static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
709 		struct dentry *parent, int type)
710 {
711 	struct dentry		*file;
712 	struct dwc3_ep_file_map	*ep_file = &map[type];
713 
714 	file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep,
715 			&dwc3_endpoint_fops);
716 }
717 
718 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
719 		struct dentry *parent)
720 {
721 	int			i;
722 
723 	for (i = 0; i < ARRAY_SIZE(map); i++)
724 		dwc3_debugfs_create_endpoint_file(dep, parent, i);
725 }
726 
727 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
728 		struct dentry *parent)
729 {
730 	struct dentry		*dir;
731 
732 	dir = debugfs_create_dir(dep->name, parent);
733 	if (IS_ERR_OR_NULL(dir))
734 		return;
735 
736 	dwc3_debugfs_create_endpoint_files(dep, dir);
737 }
738 
739 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
740 		struct dentry *parent)
741 {
742 	int			i;
743 
744 	for (i = 0; i < dwc->num_eps; i++) {
745 		struct dwc3_ep	*dep = dwc->eps[i];
746 
747 		if (!dep)
748 			continue;
749 
750 		dwc3_debugfs_create_endpoint_dir(dep, parent);
751 	}
752 }
753 
754 void dwc3_debugfs_init(struct dwc3 *dwc)
755 {
756 	struct dentry		*root;
757 	struct dentry           *file;
758 
759 	root = debugfs_create_dir(dev_name(dwc->dev), NULL);
760 	if (IS_ERR_OR_NULL(root)) {
761 		if (!root)
762 			dev_err(dwc->dev, "Can't create debugfs root\n");
763 		return;
764 	}
765 	dwc->root = root;
766 
767 	dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
768 	if (!dwc->regset) {
769 		debugfs_remove_recursive(root);
770 		return;
771 	}
772 
773 	dwc->regset->regs = dwc3_regs;
774 	dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
775 	dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
776 
777 	file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
778 	if (!file)
779 		dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
780 
781 	if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
782 		file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
783 				dwc, &dwc3_mode_fops);
784 		if (!file)
785 			dev_dbg(dwc->dev, "Can't create debugfs mode\n");
786 	}
787 
788 	if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
789 			IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
790 		file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
791 				dwc, &dwc3_testmode_fops);
792 		if (!file)
793 			dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
794 
795 		file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
796 				root, dwc, &dwc3_link_state_fops);
797 		if (!file)
798 			dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
799 
800 		dwc3_debugfs_create_endpoint_dirs(dwc, root);
801 	}
802 }
803 
804 void dwc3_debugfs_exit(struct dwc3 *dwc)
805 {
806 	debugfs_remove_recursive(dwc->root);
807 	kfree(dwc->regset);
808 }
809