xref: /openbmc/linux/drivers/usb/dwc2/debugfs.c (revision 68198dca)
1 // SPDX-License-Identifier: GPL-2.0
2 /**
3  * debugfs.c - Designware USB2 DRD controller debugfs
4  *
5  * Copyright (C) 2015 Intel Corporation
6  * Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
7  */
8 
9 #include <linux/spinlock.h>
10 #include <linux/debugfs.h>
11 #include <linux/seq_file.h>
12 #include <linux/uaccess.h>
13 
14 #include "core.h"
15 #include "debug.h"
16 
17 #if IS_ENABLED(CONFIG_USB_DWC2_PERIPHERAL) || \
18 	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
19 /**
20  * testmode_write - debugfs: change usb test mode
21  * @seq: The seq file to write to.
22  * @v: Unused parameter.
23  *
24  * This debugfs entry modify the current usb test mode.
25  */
26 static ssize_t testmode_write(struct file *file, const char __user *ubuf, size_t
27 		count, loff_t *ppos)
28 {
29 	struct seq_file		*s = file->private_data;
30 	struct dwc2_hsotg	*hsotg = s->private;
31 	unsigned long		flags;
32 	u32			testmode = 0;
33 	char			buf[32];
34 
35 	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
36 		return -EFAULT;
37 
38 	if (!strncmp(buf, "test_j", 6))
39 		testmode = TEST_J;
40 	else if (!strncmp(buf, "test_k", 6))
41 		testmode = TEST_K;
42 	else if (!strncmp(buf, "test_se0_nak", 12))
43 		testmode = TEST_SE0_NAK;
44 	else if (!strncmp(buf, "test_packet", 11))
45 		testmode = TEST_PACKET;
46 	else if (!strncmp(buf, "test_force_enable", 17))
47 		testmode = TEST_FORCE_EN;
48 	else
49 		testmode = 0;
50 
51 	spin_lock_irqsave(&hsotg->lock, flags);
52 	dwc2_hsotg_set_test_mode(hsotg, testmode);
53 	spin_unlock_irqrestore(&hsotg->lock, flags);
54 	return count;
55 }
56 
57 /**
58  * testmode_show - debugfs: show usb test mode state
59  * @seq: The seq file to write to.
60  * @v: Unused parameter.
61  *
62  * This debugfs entry shows which usb test mode is currently enabled.
63  */
64 static int testmode_show(struct seq_file *s, void *unused)
65 {
66 	struct dwc2_hsotg *hsotg = s->private;
67 	unsigned long flags;
68 	int dctl;
69 
70 	spin_lock_irqsave(&hsotg->lock, flags);
71 	dctl = dwc2_readl(hsotg->regs + DCTL);
72 	dctl &= DCTL_TSTCTL_MASK;
73 	dctl >>= DCTL_TSTCTL_SHIFT;
74 	spin_unlock_irqrestore(&hsotg->lock, flags);
75 
76 	switch (dctl) {
77 	case 0:
78 		seq_puts(s, "no test\n");
79 		break;
80 	case TEST_J:
81 		seq_puts(s, "test_j\n");
82 		break;
83 	case TEST_K:
84 		seq_puts(s, "test_k\n");
85 		break;
86 	case TEST_SE0_NAK:
87 		seq_puts(s, "test_se0_nak\n");
88 		break;
89 	case TEST_PACKET:
90 		seq_puts(s, "test_packet\n");
91 		break;
92 	case TEST_FORCE_EN:
93 		seq_puts(s, "test_force_enable\n");
94 		break;
95 	default:
96 		seq_printf(s, "UNKNOWN %d\n", dctl);
97 	}
98 
99 	return 0;
100 }
101 
102 static int testmode_open(struct inode *inode, struct file *file)
103 {
104 	return single_open(file, testmode_show, inode->i_private);
105 }
106 
107 static const struct file_operations testmode_fops = {
108 	.owner		= THIS_MODULE,
109 	.open		= testmode_open,
110 	.write		= testmode_write,
111 	.read		= seq_read,
112 	.llseek		= seq_lseek,
113 	.release	= single_release,
114 };
115 
116 /**
117  * state_show - debugfs: show overall driver and device state.
118  * @seq: The seq file to write to.
119  * @v: Unused parameter.
120  *
121  * This debugfs entry shows the overall state of the hardware and
122  * some general information about each of the endpoints available
123  * to the system.
124  */
125 static int state_show(struct seq_file *seq, void *v)
126 {
127 	struct dwc2_hsotg *hsotg = seq->private;
128 	void __iomem *regs = hsotg->regs;
129 	int idx;
130 
131 	seq_printf(seq, "DCFG=0x%08x, DCTL=0x%08x, DSTS=0x%08x\n",
132 		   dwc2_readl(regs + DCFG),
133 		 dwc2_readl(regs + DCTL),
134 		 dwc2_readl(regs + DSTS));
135 
136 	seq_printf(seq, "DIEPMSK=0x%08x, DOEPMASK=0x%08x\n",
137 		   dwc2_readl(regs + DIEPMSK), dwc2_readl(regs + DOEPMSK));
138 
139 	seq_printf(seq, "GINTMSK=0x%08x, GINTSTS=0x%08x\n",
140 		   dwc2_readl(regs + GINTMSK),
141 		   dwc2_readl(regs + GINTSTS));
142 
143 	seq_printf(seq, "DAINTMSK=0x%08x, DAINT=0x%08x\n",
144 		   dwc2_readl(regs + DAINTMSK),
145 		   dwc2_readl(regs + DAINT));
146 
147 	seq_printf(seq, "GNPTXSTS=0x%08x, GRXSTSR=%08x\n",
148 		   dwc2_readl(regs + GNPTXSTS),
149 		   dwc2_readl(regs + GRXSTSR));
150 
151 	seq_puts(seq, "\nEndpoint status:\n");
152 
153 	for (idx = 0; idx < hsotg->num_of_eps; idx++) {
154 		u32 in, out;
155 
156 		in = dwc2_readl(regs + DIEPCTL(idx));
157 		out = dwc2_readl(regs + DOEPCTL(idx));
158 
159 		seq_printf(seq, "ep%d: DIEPCTL=0x%08x, DOEPCTL=0x%08x",
160 			   idx, in, out);
161 
162 		in = dwc2_readl(regs + DIEPTSIZ(idx));
163 		out = dwc2_readl(regs + DOEPTSIZ(idx));
164 
165 		seq_printf(seq, ", DIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x",
166 			   in, out);
167 
168 		seq_puts(seq, "\n");
169 	}
170 
171 	return 0;
172 }
173 
174 static int state_open(struct inode *inode, struct file *file)
175 {
176 	return single_open(file, state_show, inode->i_private);
177 }
178 
179 static const struct file_operations state_fops = {
180 	.owner		= THIS_MODULE,
181 	.open		= state_open,
182 	.read		= seq_read,
183 	.llseek		= seq_lseek,
184 	.release	= single_release,
185 };
186 
187 /**
188  * fifo_show - debugfs: show the fifo information
189  * @seq: The seq_file to write data to.
190  * @v: Unused parameter.
191  *
192  * Show the FIFO information for the overall fifo and all the
193  * periodic transmission FIFOs.
194  */
195 static int fifo_show(struct seq_file *seq, void *v)
196 {
197 	struct dwc2_hsotg *hsotg = seq->private;
198 	void __iomem *regs = hsotg->regs;
199 	u32 val;
200 	int idx;
201 
202 	seq_puts(seq, "Non-periodic FIFOs:\n");
203 	seq_printf(seq, "RXFIFO: Size %d\n", dwc2_readl(regs + GRXFSIZ));
204 
205 	val = dwc2_readl(regs + GNPTXFSIZ);
206 	seq_printf(seq, "NPTXFIFO: Size %d, Start 0x%08x\n",
207 		   val >> FIFOSIZE_DEPTH_SHIFT,
208 		   val & FIFOSIZE_STARTADDR_MASK);
209 
210 	seq_puts(seq, "\nPeriodic TXFIFOs:\n");
211 
212 	for (idx = 1; idx < hsotg->num_of_eps; idx++) {
213 		val = dwc2_readl(regs + DPTXFSIZN(idx));
214 
215 		seq_printf(seq, "\tDPTXFIFO%2d: Size %d, Start 0x%08x\n", idx,
216 			   val >> FIFOSIZE_DEPTH_SHIFT,
217 			   val & FIFOSIZE_STARTADDR_MASK);
218 	}
219 
220 	return 0;
221 }
222 
223 static int fifo_open(struct inode *inode, struct file *file)
224 {
225 	return single_open(file, fifo_show, inode->i_private);
226 }
227 
228 static const struct file_operations fifo_fops = {
229 	.owner		= THIS_MODULE,
230 	.open		= fifo_open,
231 	.read		= seq_read,
232 	.llseek		= seq_lseek,
233 	.release	= single_release,
234 };
235 
236 static const char *decode_direction(int is_in)
237 {
238 	return is_in ? "in" : "out";
239 }
240 
241 /**
242  * ep_show - debugfs: show the state of an endpoint.
243  * @seq: The seq_file to write data to.
244  * @v: Unused parameter.
245  *
246  * This debugfs entry shows the state of the given endpoint (one is
247  * registered for each available).
248  */
249 static int ep_show(struct seq_file *seq, void *v)
250 {
251 	struct dwc2_hsotg_ep *ep = seq->private;
252 	struct dwc2_hsotg *hsotg = ep->parent;
253 	struct dwc2_hsotg_req *req;
254 	void __iomem *regs = hsotg->regs;
255 	int index = ep->index;
256 	int show_limit = 15;
257 	unsigned long flags;
258 
259 	seq_printf(seq, "Endpoint index %d, named %s,  dir %s:\n",
260 		   ep->index, ep->ep.name, decode_direction(ep->dir_in));
261 
262 	/* first show the register state */
263 
264 	seq_printf(seq, "\tDIEPCTL=0x%08x, DOEPCTL=0x%08x\n",
265 		   dwc2_readl(regs + DIEPCTL(index)),
266 		   dwc2_readl(regs + DOEPCTL(index)));
267 
268 	seq_printf(seq, "\tDIEPDMA=0x%08x, DOEPDMA=0x%08x\n",
269 		   dwc2_readl(regs + DIEPDMA(index)),
270 		   dwc2_readl(regs + DOEPDMA(index)));
271 
272 	seq_printf(seq, "\tDIEPINT=0x%08x, DOEPINT=0x%08x\n",
273 		   dwc2_readl(regs + DIEPINT(index)),
274 		   dwc2_readl(regs + DOEPINT(index)));
275 
276 	seq_printf(seq, "\tDIEPTSIZ=0x%08x, DOEPTSIZ=0x%08x\n",
277 		   dwc2_readl(regs + DIEPTSIZ(index)),
278 		   dwc2_readl(regs + DOEPTSIZ(index)));
279 
280 	seq_puts(seq, "\n");
281 	seq_printf(seq, "mps %d\n", ep->ep.maxpacket);
282 	seq_printf(seq, "total_data=%ld\n", ep->total_data);
283 
284 	seq_printf(seq, "request list (%p,%p):\n",
285 		   ep->queue.next, ep->queue.prev);
286 
287 	spin_lock_irqsave(&hsotg->lock, flags);
288 
289 	list_for_each_entry(req, &ep->queue, queue) {
290 		if (--show_limit < 0) {
291 			seq_puts(seq, "not showing more requests...\n");
292 			break;
293 		}
294 
295 		seq_printf(seq, "%c req %p: %d bytes @%p, ",
296 			   req == ep->req ? '*' : ' ',
297 			   req, req->req.length, req->req.buf);
298 		seq_printf(seq, "%d done, res %d\n",
299 			   req->req.actual, req->req.status);
300 	}
301 
302 	spin_unlock_irqrestore(&hsotg->lock, flags);
303 
304 	return 0;
305 }
306 
307 static int ep_open(struct inode *inode, struct file *file)
308 {
309 	return single_open(file, ep_show, inode->i_private);
310 }
311 
312 static const struct file_operations ep_fops = {
313 	.owner		= THIS_MODULE,
314 	.open		= ep_open,
315 	.read		= seq_read,
316 	.llseek		= seq_lseek,
317 	.release	= single_release,
318 };
319 
320 /**
321  * dwc2_hsotg_create_debug - create debugfs directory and files
322  * @hsotg: The driver state
323  *
324  * Create the debugfs files to allow the user to get information
325  * about the state of the system. The directory name is created
326  * with the same name as the device itself, in case we end up
327  * with multiple blocks in future systems.
328  */
329 static void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg)
330 {
331 	struct dentry *root;
332 	struct dentry *file;
333 	unsigned int epidx;
334 
335 	root = hsotg->debug_root;
336 
337 	/* create general state file */
338 
339 	file = debugfs_create_file("state", 0444, root, hsotg, &state_fops);
340 	if (IS_ERR(file))
341 		dev_err(hsotg->dev, "%s: failed to create state\n", __func__);
342 
343 	file = debugfs_create_file("testmode", 0644, root, hsotg,
344 				   &testmode_fops);
345 	if (IS_ERR(file))
346 		dev_err(hsotg->dev, "%s: failed to create testmode\n",
347 			__func__);
348 
349 	file = debugfs_create_file("fifo", 0444, root, hsotg, &fifo_fops);
350 	if (IS_ERR(file))
351 		dev_err(hsotg->dev, "%s: failed to create fifo\n", __func__);
352 
353 	/* Create one file for each out endpoint */
354 	for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
355 		struct dwc2_hsotg_ep *ep;
356 
357 		ep = hsotg->eps_out[epidx];
358 		if (ep) {
359 			file = debugfs_create_file(ep->name, 0444,
360 						   root, ep, &ep_fops);
361 			if (IS_ERR(file))
362 				dev_err(hsotg->dev, "failed to create %s debug file\n",
363 					ep->name);
364 		}
365 	}
366 	/* Create one file for each in endpoint. EP0 is handled with out eps */
367 	for (epidx = 1; epidx < hsotg->num_of_eps; epidx++) {
368 		struct dwc2_hsotg_ep *ep;
369 
370 		ep = hsotg->eps_in[epidx];
371 		if (ep) {
372 			file = debugfs_create_file(ep->name, 0444,
373 						   root, ep, &ep_fops);
374 			if (IS_ERR(file))
375 				dev_err(hsotg->dev, "failed to create %s debug file\n",
376 					ep->name);
377 		}
378 	}
379 }
380 #else
381 static inline void dwc2_hsotg_create_debug(struct dwc2_hsotg *hsotg) {}
382 #endif
383 
384 /* dwc2_hsotg_delete_debug is removed as cleanup in done in dwc2_debugfs_exit */
385 
386 #define dump_register(nm)	\
387 {				\
388 	.name	= #nm,		\
389 	.offset	= nm,		\
390 }
391 
392 static const struct debugfs_reg32 dwc2_regs[] = {
393 	/*
394 	 * Accessing registers like this can trigger mode mismatch interrupt.
395 	 * However, according to dwc2 databook, the register access, in this
396 	 * case, is completed on the processor bus but is ignored by the core
397 	 * and does not affect its operation.
398 	 */
399 	dump_register(GOTGCTL),
400 	dump_register(GOTGINT),
401 	dump_register(GAHBCFG),
402 	dump_register(GUSBCFG),
403 	dump_register(GRSTCTL),
404 	dump_register(GINTSTS),
405 	dump_register(GINTMSK),
406 	dump_register(GRXSTSR),
407 	dump_register(GRXSTSP),
408 	dump_register(GRXFSIZ),
409 	dump_register(GNPTXFSIZ),
410 	dump_register(GNPTXSTS),
411 	dump_register(GI2CCTL),
412 	dump_register(GPVNDCTL),
413 	dump_register(GGPIO),
414 	dump_register(GUID),
415 	dump_register(GSNPSID),
416 	dump_register(GHWCFG1),
417 	dump_register(GHWCFG2),
418 	dump_register(GHWCFG3),
419 	dump_register(GHWCFG4),
420 	dump_register(GLPMCFG),
421 	dump_register(GPWRDN),
422 	dump_register(GDFIFOCFG),
423 	dump_register(ADPCTL),
424 	dump_register(HPTXFSIZ),
425 	dump_register(DPTXFSIZN(1)),
426 	dump_register(DPTXFSIZN(2)),
427 	dump_register(DPTXFSIZN(3)),
428 	dump_register(DPTXFSIZN(4)),
429 	dump_register(DPTXFSIZN(5)),
430 	dump_register(DPTXFSIZN(6)),
431 	dump_register(DPTXFSIZN(7)),
432 	dump_register(DPTXFSIZN(8)),
433 	dump_register(DPTXFSIZN(9)),
434 	dump_register(DPTXFSIZN(10)),
435 	dump_register(DPTXFSIZN(11)),
436 	dump_register(DPTXFSIZN(12)),
437 	dump_register(DPTXFSIZN(13)),
438 	dump_register(DPTXFSIZN(14)),
439 	dump_register(DPTXFSIZN(15)),
440 	dump_register(DCFG),
441 	dump_register(DCTL),
442 	dump_register(DSTS),
443 	dump_register(DIEPMSK),
444 	dump_register(DOEPMSK),
445 	dump_register(DAINT),
446 	dump_register(DAINTMSK),
447 	dump_register(DTKNQR1),
448 	dump_register(DTKNQR2),
449 	dump_register(DTKNQR3),
450 	dump_register(DTKNQR4),
451 	dump_register(DVBUSDIS),
452 	dump_register(DVBUSPULSE),
453 	dump_register(DIEPCTL(0)),
454 	dump_register(DIEPCTL(1)),
455 	dump_register(DIEPCTL(2)),
456 	dump_register(DIEPCTL(3)),
457 	dump_register(DIEPCTL(4)),
458 	dump_register(DIEPCTL(5)),
459 	dump_register(DIEPCTL(6)),
460 	dump_register(DIEPCTL(7)),
461 	dump_register(DIEPCTL(8)),
462 	dump_register(DIEPCTL(9)),
463 	dump_register(DIEPCTL(10)),
464 	dump_register(DIEPCTL(11)),
465 	dump_register(DIEPCTL(12)),
466 	dump_register(DIEPCTL(13)),
467 	dump_register(DIEPCTL(14)),
468 	dump_register(DIEPCTL(15)),
469 	dump_register(DOEPCTL(0)),
470 	dump_register(DOEPCTL(1)),
471 	dump_register(DOEPCTL(2)),
472 	dump_register(DOEPCTL(3)),
473 	dump_register(DOEPCTL(4)),
474 	dump_register(DOEPCTL(5)),
475 	dump_register(DOEPCTL(6)),
476 	dump_register(DOEPCTL(7)),
477 	dump_register(DOEPCTL(8)),
478 	dump_register(DOEPCTL(9)),
479 	dump_register(DOEPCTL(10)),
480 	dump_register(DOEPCTL(11)),
481 	dump_register(DOEPCTL(12)),
482 	dump_register(DOEPCTL(13)),
483 	dump_register(DOEPCTL(14)),
484 	dump_register(DOEPCTL(15)),
485 	dump_register(DIEPINT(0)),
486 	dump_register(DIEPINT(1)),
487 	dump_register(DIEPINT(2)),
488 	dump_register(DIEPINT(3)),
489 	dump_register(DIEPINT(4)),
490 	dump_register(DIEPINT(5)),
491 	dump_register(DIEPINT(6)),
492 	dump_register(DIEPINT(7)),
493 	dump_register(DIEPINT(8)),
494 	dump_register(DIEPINT(9)),
495 	dump_register(DIEPINT(10)),
496 	dump_register(DIEPINT(11)),
497 	dump_register(DIEPINT(12)),
498 	dump_register(DIEPINT(13)),
499 	dump_register(DIEPINT(14)),
500 	dump_register(DIEPINT(15)),
501 	dump_register(DOEPINT(0)),
502 	dump_register(DOEPINT(1)),
503 	dump_register(DOEPINT(2)),
504 	dump_register(DOEPINT(3)),
505 	dump_register(DOEPINT(4)),
506 	dump_register(DOEPINT(5)),
507 	dump_register(DOEPINT(6)),
508 	dump_register(DOEPINT(7)),
509 	dump_register(DOEPINT(8)),
510 	dump_register(DOEPINT(9)),
511 	dump_register(DOEPINT(10)),
512 	dump_register(DOEPINT(11)),
513 	dump_register(DOEPINT(12)),
514 	dump_register(DOEPINT(13)),
515 	dump_register(DOEPINT(14)),
516 	dump_register(DOEPINT(15)),
517 	dump_register(DIEPTSIZ(0)),
518 	dump_register(DIEPTSIZ(1)),
519 	dump_register(DIEPTSIZ(2)),
520 	dump_register(DIEPTSIZ(3)),
521 	dump_register(DIEPTSIZ(4)),
522 	dump_register(DIEPTSIZ(5)),
523 	dump_register(DIEPTSIZ(6)),
524 	dump_register(DIEPTSIZ(7)),
525 	dump_register(DIEPTSIZ(8)),
526 	dump_register(DIEPTSIZ(9)),
527 	dump_register(DIEPTSIZ(10)),
528 	dump_register(DIEPTSIZ(11)),
529 	dump_register(DIEPTSIZ(12)),
530 	dump_register(DIEPTSIZ(13)),
531 	dump_register(DIEPTSIZ(14)),
532 	dump_register(DIEPTSIZ(15)),
533 	dump_register(DOEPTSIZ(0)),
534 	dump_register(DOEPTSIZ(1)),
535 	dump_register(DOEPTSIZ(2)),
536 	dump_register(DOEPTSIZ(3)),
537 	dump_register(DOEPTSIZ(4)),
538 	dump_register(DOEPTSIZ(5)),
539 	dump_register(DOEPTSIZ(6)),
540 	dump_register(DOEPTSIZ(7)),
541 	dump_register(DOEPTSIZ(8)),
542 	dump_register(DOEPTSIZ(9)),
543 	dump_register(DOEPTSIZ(10)),
544 	dump_register(DOEPTSIZ(11)),
545 	dump_register(DOEPTSIZ(12)),
546 	dump_register(DOEPTSIZ(13)),
547 	dump_register(DOEPTSIZ(14)),
548 	dump_register(DOEPTSIZ(15)),
549 	dump_register(DIEPDMA(0)),
550 	dump_register(DIEPDMA(1)),
551 	dump_register(DIEPDMA(2)),
552 	dump_register(DIEPDMA(3)),
553 	dump_register(DIEPDMA(4)),
554 	dump_register(DIEPDMA(5)),
555 	dump_register(DIEPDMA(6)),
556 	dump_register(DIEPDMA(7)),
557 	dump_register(DIEPDMA(8)),
558 	dump_register(DIEPDMA(9)),
559 	dump_register(DIEPDMA(10)),
560 	dump_register(DIEPDMA(11)),
561 	dump_register(DIEPDMA(12)),
562 	dump_register(DIEPDMA(13)),
563 	dump_register(DIEPDMA(14)),
564 	dump_register(DIEPDMA(15)),
565 	dump_register(DOEPDMA(0)),
566 	dump_register(DOEPDMA(1)),
567 	dump_register(DOEPDMA(2)),
568 	dump_register(DOEPDMA(3)),
569 	dump_register(DOEPDMA(4)),
570 	dump_register(DOEPDMA(5)),
571 	dump_register(DOEPDMA(6)),
572 	dump_register(DOEPDMA(7)),
573 	dump_register(DOEPDMA(8)),
574 	dump_register(DOEPDMA(9)),
575 	dump_register(DOEPDMA(10)),
576 	dump_register(DOEPDMA(11)),
577 	dump_register(DOEPDMA(12)),
578 	dump_register(DOEPDMA(13)),
579 	dump_register(DOEPDMA(14)),
580 	dump_register(DOEPDMA(15)),
581 	dump_register(DTXFSTS(0)),
582 	dump_register(DTXFSTS(1)),
583 	dump_register(DTXFSTS(2)),
584 	dump_register(DTXFSTS(3)),
585 	dump_register(DTXFSTS(4)),
586 	dump_register(DTXFSTS(5)),
587 	dump_register(DTXFSTS(6)),
588 	dump_register(DTXFSTS(7)),
589 	dump_register(DTXFSTS(8)),
590 	dump_register(DTXFSTS(9)),
591 	dump_register(DTXFSTS(10)),
592 	dump_register(DTXFSTS(11)),
593 	dump_register(DTXFSTS(12)),
594 	dump_register(DTXFSTS(13)),
595 	dump_register(DTXFSTS(14)),
596 	dump_register(DTXFSTS(15)),
597 	dump_register(PCGCTL),
598 	dump_register(HCFG),
599 	dump_register(HFIR),
600 	dump_register(HFNUM),
601 	dump_register(HPTXSTS),
602 	dump_register(HAINT),
603 	dump_register(HAINTMSK),
604 	dump_register(HFLBADDR),
605 	dump_register(HPRT0),
606 	dump_register(HCCHAR(0)),
607 	dump_register(HCCHAR(1)),
608 	dump_register(HCCHAR(2)),
609 	dump_register(HCCHAR(3)),
610 	dump_register(HCCHAR(4)),
611 	dump_register(HCCHAR(5)),
612 	dump_register(HCCHAR(6)),
613 	dump_register(HCCHAR(7)),
614 	dump_register(HCCHAR(8)),
615 	dump_register(HCCHAR(9)),
616 	dump_register(HCCHAR(10)),
617 	dump_register(HCCHAR(11)),
618 	dump_register(HCCHAR(12)),
619 	dump_register(HCCHAR(13)),
620 	dump_register(HCCHAR(14)),
621 	dump_register(HCCHAR(15)),
622 	dump_register(HCSPLT(0)),
623 	dump_register(HCSPLT(1)),
624 	dump_register(HCSPLT(2)),
625 	dump_register(HCSPLT(3)),
626 	dump_register(HCSPLT(4)),
627 	dump_register(HCSPLT(5)),
628 	dump_register(HCSPLT(6)),
629 	dump_register(HCSPLT(7)),
630 	dump_register(HCSPLT(8)),
631 	dump_register(HCSPLT(9)),
632 	dump_register(HCSPLT(10)),
633 	dump_register(HCSPLT(11)),
634 	dump_register(HCSPLT(12)),
635 	dump_register(HCSPLT(13)),
636 	dump_register(HCSPLT(14)),
637 	dump_register(HCSPLT(15)),
638 	dump_register(HCINT(0)),
639 	dump_register(HCINT(1)),
640 	dump_register(HCINT(2)),
641 	dump_register(HCINT(3)),
642 	dump_register(HCINT(4)),
643 	dump_register(HCINT(5)),
644 	dump_register(HCINT(6)),
645 	dump_register(HCINT(7)),
646 	dump_register(HCINT(8)),
647 	dump_register(HCINT(9)),
648 	dump_register(HCINT(10)),
649 	dump_register(HCINT(11)),
650 	dump_register(HCINT(12)),
651 	dump_register(HCINT(13)),
652 	dump_register(HCINT(14)),
653 	dump_register(HCINT(15)),
654 	dump_register(HCINTMSK(0)),
655 	dump_register(HCINTMSK(1)),
656 	dump_register(HCINTMSK(2)),
657 	dump_register(HCINTMSK(3)),
658 	dump_register(HCINTMSK(4)),
659 	dump_register(HCINTMSK(5)),
660 	dump_register(HCINTMSK(6)),
661 	dump_register(HCINTMSK(7)),
662 	dump_register(HCINTMSK(8)),
663 	dump_register(HCINTMSK(9)),
664 	dump_register(HCINTMSK(10)),
665 	dump_register(HCINTMSK(11)),
666 	dump_register(HCINTMSK(12)),
667 	dump_register(HCINTMSK(13)),
668 	dump_register(HCINTMSK(14)),
669 	dump_register(HCINTMSK(15)),
670 	dump_register(HCTSIZ(0)),
671 	dump_register(HCTSIZ(1)),
672 	dump_register(HCTSIZ(2)),
673 	dump_register(HCTSIZ(3)),
674 	dump_register(HCTSIZ(4)),
675 	dump_register(HCTSIZ(5)),
676 	dump_register(HCTSIZ(6)),
677 	dump_register(HCTSIZ(7)),
678 	dump_register(HCTSIZ(8)),
679 	dump_register(HCTSIZ(9)),
680 	dump_register(HCTSIZ(10)),
681 	dump_register(HCTSIZ(11)),
682 	dump_register(HCTSIZ(12)),
683 	dump_register(HCTSIZ(13)),
684 	dump_register(HCTSIZ(14)),
685 	dump_register(HCTSIZ(15)),
686 	dump_register(HCDMA(0)),
687 	dump_register(HCDMA(1)),
688 	dump_register(HCDMA(2)),
689 	dump_register(HCDMA(3)),
690 	dump_register(HCDMA(4)),
691 	dump_register(HCDMA(5)),
692 	dump_register(HCDMA(6)),
693 	dump_register(HCDMA(7)),
694 	dump_register(HCDMA(8)),
695 	dump_register(HCDMA(9)),
696 	dump_register(HCDMA(10)),
697 	dump_register(HCDMA(11)),
698 	dump_register(HCDMA(12)),
699 	dump_register(HCDMA(13)),
700 	dump_register(HCDMA(14)),
701 	dump_register(HCDMA(15)),
702 	dump_register(HCDMAB(0)),
703 	dump_register(HCDMAB(1)),
704 	dump_register(HCDMAB(2)),
705 	dump_register(HCDMAB(3)),
706 	dump_register(HCDMAB(4)),
707 	dump_register(HCDMAB(5)),
708 	dump_register(HCDMAB(6)),
709 	dump_register(HCDMAB(7)),
710 	dump_register(HCDMAB(8)),
711 	dump_register(HCDMAB(9)),
712 	dump_register(HCDMAB(10)),
713 	dump_register(HCDMAB(11)),
714 	dump_register(HCDMAB(12)),
715 	dump_register(HCDMAB(13)),
716 	dump_register(HCDMAB(14)),
717 	dump_register(HCDMAB(15)),
718 };
719 
720 #define print_param(_seq, _ptr, _param) \
721 seq_printf((_seq), "%-30s: %d\n", #_param, (_ptr)->_param)
722 
723 #define print_param_hex(_seq, _ptr, _param) \
724 seq_printf((_seq), "%-30s: 0x%x\n", #_param, (_ptr)->_param)
725 
726 static int params_show(struct seq_file *seq, void *v)
727 {
728 	struct dwc2_hsotg *hsotg = seq->private;
729 	struct dwc2_core_params *p = &hsotg->params;
730 	int i;
731 
732 	print_param(seq, p, otg_cap);
733 	print_param(seq, p, dma_desc_enable);
734 	print_param(seq, p, dma_desc_fs_enable);
735 	print_param(seq, p, speed);
736 	print_param(seq, p, enable_dynamic_fifo);
737 	print_param(seq, p, en_multiple_tx_fifo);
738 	print_param(seq, p, host_rx_fifo_size);
739 	print_param(seq, p, host_nperio_tx_fifo_size);
740 	print_param(seq, p, host_perio_tx_fifo_size);
741 	print_param(seq, p, max_transfer_size);
742 	print_param(seq, p, max_packet_count);
743 	print_param(seq, p, host_channels);
744 	print_param(seq, p, phy_type);
745 	print_param(seq, p, phy_utmi_width);
746 	print_param(seq, p, phy_ulpi_ddr);
747 	print_param(seq, p, phy_ulpi_ext_vbus);
748 	print_param(seq, p, i2c_enable);
749 	print_param(seq, p, ulpi_fs_ls);
750 	print_param(seq, p, host_support_fs_ls_low_power);
751 	print_param(seq, p, host_ls_low_power_phy_clk);
752 	print_param(seq, p, ts_dline);
753 	print_param(seq, p, reload_ctl);
754 	print_param_hex(seq, p, ahbcfg);
755 	print_param(seq, p, uframe_sched);
756 	print_param(seq, p, external_id_pin_ctl);
757 	print_param(seq, p, hibernation);
758 	print_param(seq, p, host_dma);
759 	print_param(seq, p, g_dma);
760 	print_param(seq, p, g_dma_desc);
761 	print_param(seq, p, g_rx_fifo_size);
762 	print_param(seq, p, g_np_tx_fifo_size);
763 
764 	for (i = 0; i < MAX_EPS_CHANNELS; i++) {
765 		char str[32];
766 
767 		snprintf(str, 32, "g_tx_fifo_size[%d]", i);
768 		seq_printf(seq, "%-30s: %d\n", str, p->g_tx_fifo_size[i]);
769 	}
770 
771 	return 0;
772 }
773 
774 static int params_open(struct inode *inode, struct file *file)
775 {
776 	return single_open(file, params_show, inode->i_private);
777 }
778 
779 static const struct file_operations params_fops = {
780 	.owner		= THIS_MODULE,
781 	.open		= params_open,
782 	.read		= seq_read,
783 	.llseek		= seq_lseek,
784 	.release	= single_release,
785 };
786 
787 static int hw_params_show(struct seq_file *seq, void *v)
788 {
789 	struct dwc2_hsotg *hsotg = seq->private;
790 	struct dwc2_hw_params *hw = &hsotg->hw_params;
791 
792 	print_param(seq, hw, op_mode);
793 	print_param(seq, hw, arch);
794 	print_param(seq, hw, dma_desc_enable);
795 	print_param(seq, hw, enable_dynamic_fifo);
796 	print_param(seq, hw, en_multiple_tx_fifo);
797 	print_param(seq, hw, rx_fifo_size);
798 	print_param(seq, hw, host_nperio_tx_fifo_size);
799 	print_param(seq, hw, dev_nperio_tx_fifo_size);
800 	print_param(seq, hw, host_perio_tx_fifo_size);
801 	print_param(seq, hw, nperio_tx_q_depth);
802 	print_param(seq, hw, host_perio_tx_q_depth);
803 	print_param(seq, hw, dev_token_q_depth);
804 	print_param(seq, hw, max_transfer_size);
805 	print_param(seq, hw, max_packet_count);
806 	print_param(seq, hw, host_channels);
807 	print_param(seq, hw, hs_phy_type);
808 	print_param(seq, hw, fs_phy_type);
809 	print_param(seq, hw, i2c_enable);
810 	print_param(seq, hw, num_dev_ep);
811 	print_param(seq, hw, num_dev_perio_in_ep);
812 	print_param(seq, hw, total_fifo_size);
813 	print_param(seq, hw, power_optimized);
814 	print_param(seq, hw, utmi_phy_data_width);
815 	print_param_hex(seq, hw, snpsid);
816 	print_param_hex(seq, hw, dev_ep_dirs);
817 
818 	return 0;
819 }
820 
821 static int hw_params_open(struct inode *inode, struct file *file)
822 {
823 	return single_open(file, hw_params_show, inode->i_private);
824 }
825 
826 static const struct file_operations hw_params_fops = {
827 	.owner		= THIS_MODULE,
828 	.open		= hw_params_open,
829 	.read		= seq_read,
830 	.llseek		= seq_lseek,
831 	.release	= single_release,
832 };
833 
834 static int dr_mode_show(struct seq_file *seq, void *v)
835 {
836 	struct dwc2_hsotg *hsotg = seq->private;
837 	const char *dr_mode = "";
838 
839 	device_property_read_string(hsotg->dev, "dr_mode", &dr_mode);
840 	seq_printf(seq, "%s\n", dr_mode);
841 	return 0;
842 }
843 
844 static int dr_mode_open(struct inode *inode, struct file *file)
845 {
846 	return single_open(file, dr_mode_show, inode->i_private);
847 }
848 
849 static const struct file_operations dr_mode_fops = {
850 	.owner		= THIS_MODULE,
851 	.open		= dr_mode_open,
852 	.read		= seq_read,
853 	.llseek		= seq_lseek,
854 	.release	= single_release,
855 };
856 
857 int dwc2_debugfs_init(struct dwc2_hsotg *hsotg)
858 {
859 	int			ret;
860 	struct dentry		*file;
861 
862 	hsotg->debug_root = debugfs_create_dir(dev_name(hsotg->dev), NULL);
863 	if (!hsotg->debug_root) {
864 		ret = -ENOMEM;
865 		goto err0;
866 	}
867 
868 	file = debugfs_create_file("params", 0444,
869 				   hsotg->debug_root,
870 				   hsotg, &params_fops);
871 	if (IS_ERR(file))
872 		dev_err(hsotg->dev, "%s: failed to create params\n", __func__);
873 
874 	file = debugfs_create_file("hw_params", 0444,
875 				   hsotg->debug_root,
876 				   hsotg, &hw_params_fops);
877 	if (IS_ERR(file))
878 		dev_err(hsotg->dev, "%s: failed to create hw_params\n",
879 			__func__);
880 
881 	file = debugfs_create_file("dr_mode", 0444,
882 				   hsotg->debug_root,
883 				   hsotg, &dr_mode_fops);
884 	if (IS_ERR(file))
885 		dev_err(hsotg->dev, "%s: failed to create dr_mode\n", __func__);
886 
887 	/* Add gadget debugfs nodes */
888 	dwc2_hsotg_create_debug(hsotg);
889 
890 	hsotg->regset = devm_kzalloc(hsotg->dev, sizeof(*hsotg->regset),
891 								GFP_KERNEL);
892 	if (!hsotg->regset) {
893 		ret = -ENOMEM;
894 		goto err1;
895 	}
896 
897 	hsotg->regset->regs = dwc2_regs;
898 	hsotg->regset->nregs = ARRAY_SIZE(dwc2_regs);
899 	hsotg->regset->base = hsotg->regs;
900 
901 	file = debugfs_create_regset32("regdump", 0444, hsotg->debug_root,
902 				       hsotg->regset);
903 	if (!file) {
904 		ret = -ENOMEM;
905 		goto err1;
906 	}
907 
908 	return 0;
909 err1:
910 	debugfs_remove_recursive(hsotg->debug_root);
911 err0:
912 	return ret;
913 }
914 
915 void dwc2_debugfs_exit(struct dwc2_hsotg *hsotg)
916 {
917 	debugfs_remove_recursive(hsotg->debug_root);
918 	hsotg->debug_root = NULL;
919 }
920