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KVM: arm64: vgic-v3: Log which GICv3 system registers are trapped
[mirror_ubuntu-zesty-kernel.git] / drivers / usb / dwc3 / debugfs.c
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, \
40 }
41
42 #define dump_ep_register_set(n) \
43 { \
44 .name = "DEPCMDPAR2("__stringify(n)")", \
45 .offset = DWC3_DEP_BASE(n) + \
46 DWC3_DEPCMDPAR2, \
47 }, \
48 { \
49 .name = "DEPCMDPAR1("__stringify(n)")", \
50 .offset = DWC3_DEP_BASE(n) + \
51 DWC3_DEPCMDPAR1, \
52 }, \
53 { \
54 .name = "DEPCMDPAR0("__stringify(n)")", \
55 .offset = DWC3_DEP_BASE(n) + \
56 DWC3_DEPCMDPAR0, \
57 }, \
58 { \
59 .name = "DEPCMD("__stringify(n)")", \
60 .offset = DWC3_DEP_BASE(n) + \
61 DWC3_DEPCMD, \
62 }
63
64
65 static const struct debugfs_reg32 dwc3_regs[] = {
66 dump_register(GSBUSCFG0),
67 dump_register(GSBUSCFG1),
68 dump_register(GTXTHRCFG),
69 dump_register(GRXTHRCFG),
70 dump_register(GCTL),
71 dump_register(GEVTEN),
72 dump_register(GSTS),
73 dump_register(GUCTL1),
74 dump_register(GSNPSID),
75 dump_register(GGPIO),
76 dump_register(GUID),
77 dump_register(GUCTL),
78 dump_register(GBUSERRADDR0),
79 dump_register(GBUSERRADDR1),
80 dump_register(GPRTBIMAP0),
81 dump_register(GPRTBIMAP1),
82 dump_register(GHWPARAMS0),
83 dump_register(GHWPARAMS1),
84 dump_register(GHWPARAMS2),
85 dump_register(GHWPARAMS3),
86 dump_register(GHWPARAMS4),
87 dump_register(GHWPARAMS5),
88 dump_register(GHWPARAMS6),
89 dump_register(GHWPARAMS7),
90 dump_register(GDBGFIFOSPACE),
91 dump_register(GDBGLTSSM),
92 dump_register(GPRTBIMAP_HS0),
93 dump_register(GPRTBIMAP_HS1),
94 dump_register(GPRTBIMAP_FS0),
95 dump_register(GPRTBIMAP_FS1),
96
97 dump_register(GUSB2PHYCFG(0)),
98 dump_register(GUSB2PHYCFG(1)),
99 dump_register(GUSB2PHYCFG(2)),
100 dump_register(GUSB2PHYCFG(3)),
101 dump_register(GUSB2PHYCFG(4)),
102 dump_register(GUSB2PHYCFG(5)),
103 dump_register(GUSB2PHYCFG(6)),
104 dump_register(GUSB2PHYCFG(7)),
105 dump_register(GUSB2PHYCFG(8)),
106 dump_register(GUSB2PHYCFG(9)),
107 dump_register(GUSB2PHYCFG(10)),
108 dump_register(GUSB2PHYCFG(11)),
109 dump_register(GUSB2PHYCFG(12)),
110 dump_register(GUSB2PHYCFG(13)),
111 dump_register(GUSB2PHYCFG(14)),
112 dump_register(GUSB2PHYCFG(15)),
113
114 dump_register(GUSB2I2CCTL(0)),
115 dump_register(GUSB2I2CCTL(1)),
116 dump_register(GUSB2I2CCTL(2)),
117 dump_register(GUSB2I2CCTL(3)),
118 dump_register(GUSB2I2CCTL(4)),
119 dump_register(GUSB2I2CCTL(5)),
120 dump_register(GUSB2I2CCTL(6)),
121 dump_register(GUSB2I2CCTL(7)),
122 dump_register(GUSB2I2CCTL(8)),
123 dump_register(GUSB2I2CCTL(9)),
124 dump_register(GUSB2I2CCTL(10)),
125 dump_register(GUSB2I2CCTL(11)),
126 dump_register(GUSB2I2CCTL(12)),
127 dump_register(GUSB2I2CCTL(13)),
128 dump_register(GUSB2I2CCTL(14)),
129 dump_register(GUSB2I2CCTL(15)),
130
131 dump_register(GUSB2PHYACC(0)),
132 dump_register(GUSB2PHYACC(1)),
133 dump_register(GUSB2PHYACC(2)),
134 dump_register(GUSB2PHYACC(3)),
135 dump_register(GUSB2PHYACC(4)),
136 dump_register(GUSB2PHYACC(5)),
137 dump_register(GUSB2PHYACC(6)),
138 dump_register(GUSB2PHYACC(7)),
139 dump_register(GUSB2PHYACC(8)),
140 dump_register(GUSB2PHYACC(9)),
141 dump_register(GUSB2PHYACC(10)),
142 dump_register(GUSB2PHYACC(11)),
143 dump_register(GUSB2PHYACC(12)),
144 dump_register(GUSB2PHYACC(13)),
145 dump_register(GUSB2PHYACC(14)),
146 dump_register(GUSB2PHYACC(15)),
147
148 dump_register(GUSB3PIPECTL(0)),
149 dump_register(GUSB3PIPECTL(1)),
150 dump_register(GUSB3PIPECTL(2)),
151 dump_register(GUSB3PIPECTL(3)),
152 dump_register(GUSB3PIPECTL(4)),
153 dump_register(GUSB3PIPECTL(5)),
154 dump_register(GUSB3PIPECTL(6)),
155 dump_register(GUSB3PIPECTL(7)),
156 dump_register(GUSB3PIPECTL(8)),
157 dump_register(GUSB3PIPECTL(9)),
158 dump_register(GUSB3PIPECTL(10)),
159 dump_register(GUSB3PIPECTL(11)),
160 dump_register(GUSB3PIPECTL(12)),
161 dump_register(GUSB3PIPECTL(13)),
162 dump_register(GUSB3PIPECTL(14)),
163 dump_register(GUSB3PIPECTL(15)),
164
165 dump_register(GTXFIFOSIZ(0)),
166 dump_register(GTXFIFOSIZ(1)),
167 dump_register(GTXFIFOSIZ(2)),
168 dump_register(GTXFIFOSIZ(3)),
169 dump_register(GTXFIFOSIZ(4)),
170 dump_register(GTXFIFOSIZ(5)),
171 dump_register(GTXFIFOSIZ(6)),
172 dump_register(GTXFIFOSIZ(7)),
173 dump_register(GTXFIFOSIZ(8)),
174 dump_register(GTXFIFOSIZ(9)),
175 dump_register(GTXFIFOSIZ(10)),
176 dump_register(GTXFIFOSIZ(11)),
177 dump_register(GTXFIFOSIZ(12)),
178 dump_register(GTXFIFOSIZ(13)),
179 dump_register(GTXFIFOSIZ(14)),
180 dump_register(GTXFIFOSIZ(15)),
181 dump_register(GTXFIFOSIZ(16)),
182 dump_register(GTXFIFOSIZ(17)),
183 dump_register(GTXFIFOSIZ(18)),
184 dump_register(GTXFIFOSIZ(19)),
185 dump_register(GTXFIFOSIZ(20)),
186 dump_register(GTXFIFOSIZ(21)),
187 dump_register(GTXFIFOSIZ(22)),
188 dump_register(GTXFIFOSIZ(23)),
189 dump_register(GTXFIFOSIZ(24)),
190 dump_register(GTXFIFOSIZ(25)),
191 dump_register(GTXFIFOSIZ(26)),
192 dump_register(GTXFIFOSIZ(27)),
193 dump_register(GTXFIFOSIZ(28)),
194 dump_register(GTXFIFOSIZ(29)),
195 dump_register(GTXFIFOSIZ(30)),
196 dump_register(GTXFIFOSIZ(31)),
197
198 dump_register(GRXFIFOSIZ(0)),
199 dump_register(GRXFIFOSIZ(1)),
200 dump_register(GRXFIFOSIZ(2)),
201 dump_register(GRXFIFOSIZ(3)),
202 dump_register(GRXFIFOSIZ(4)),
203 dump_register(GRXFIFOSIZ(5)),
204 dump_register(GRXFIFOSIZ(6)),
205 dump_register(GRXFIFOSIZ(7)),
206 dump_register(GRXFIFOSIZ(8)),
207 dump_register(GRXFIFOSIZ(9)),
208 dump_register(GRXFIFOSIZ(10)),
209 dump_register(GRXFIFOSIZ(11)),
210 dump_register(GRXFIFOSIZ(12)),
211 dump_register(GRXFIFOSIZ(13)),
212 dump_register(GRXFIFOSIZ(14)),
213 dump_register(GRXFIFOSIZ(15)),
214 dump_register(GRXFIFOSIZ(16)),
215 dump_register(GRXFIFOSIZ(17)),
216 dump_register(GRXFIFOSIZ(18)),
217 dump_register(GRXFIFOSIZ(19)),
218 dump_register(GRXFIFOSIZ(20)),
219 dump_register(GRXFIFOSIZ(21)),
220 dump_register(GRXFIFOSIZ(22)),
221 dump_register(GRXFIFOSIZ(23)),
222 dump_register(GRXFIFOSIZ(24)),
223 dump_register(GRXFIFOSIZ(25)),
224 dump_register(GRXFIFOSIZ(26)),
225 dump_register(GRXFIFOSIZ(27)),
226 dump_register(GRXFIFOSIZ(28)),
227 dump_register(GRXFIFOSIZ(29)),
228 dump_register(GRXFIFOSIZ(30)),
229 dump_register(GRXFIFOSIZ(31)),
230
231 dump_register(GEVNTADRLO(0)),
232 dump_register(GEVNTADRHI(0)),
233 dump_register(GEVNTSIZ(0)),
234 dump_register(GEVNTCOUNT(0)),
235
236 dump_register(GHWPARAMS8),
237 dump_register(DCFG),
238 dump_register(DCTL),
239 dump_register(DEVTEN),
240 dump_register(DSTS),
241 dump_register(DGCMDPAR),
242 dump_register(DGCMD),
243 dump_register(DALEPENA),
244
245 dump_ep_register_set(0),
246 dump_ep_register_set(1),
247 dump_ep_register_set(2),
248 dump_ep_register_set(3),
249 dump_ep_register_set(4),
250 dump_ep_register_set(5),
251 dump_ep_register_set(6),
252 dump_ep_register_set(7),
253 dump_ep_register_set(8),
254 dump_ep_register_set(9),
255 dump_ep_register_set(10),
256 dump_ep_register_set(11),
257 dump_ep_register_set(12),
258 dump_ep_register_set(13),
259 dump_ep_register_set(14),
260 dump_ep_register_set(15),
261 dump_ep_register_set(16),
262 dump_ep_register_set(17),
263 dump_ep_register_set(18),
264 dump_ep_register_set(19),
265 dump_ep_register_set(20),
266 dump_ep_register_set(21),
267 dump_ep_register_set(22),
268 dump_ep_register_set(23),
269 dump_ep_register_set(24),
270 dump_ep_register_set(25),
271 dump_ep_register_set(26),
272 dump_ep_register_set(27),
273 dump_ep_register_set(28),
274 dump_ep_register_set(29),
275 dump_ep_register_set(30),
276 dump_ep_register_set(31),
277
278 dump_register(OCFG),
279 dump_register(OCTL),
280 dump_register(OEVT),
281 dump_register(OEVTEN),
282 dump_register(OSTS),
283 };
284
285 static int dwc3_mode_show(struct seq_file *s, void *unused)
286 {
287 struct dwc3 *dwc = s->private;
288 unsigned long flags;
289 u32 reg;
290
291 spin_lock_irqsave(&dwc->lock, flags);
292 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
293 spin_unlock_irqrestore(&dwc->lock, flags);
294
295 switch (DWC3_GCTL_PRTCAP(reg)) {
296 case DWC3_GCTL_PRTCAP_HOST:
297 seq_printf(s, "host\n");
298 break;
299 case DWC3_GCTL_PRTCAP_DEVICE:
300 seq_printf(s, "device\n");
301 break;
302 case DWC3_GCTL_PRTCAP_OTG:
303 seq_printf(s, "OTG\n");
304 break;
305 default:
306 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
307 }
308
309 return 0;
310 }
311
312 static int dwc3_mode_open(struct inode *inode, struct file *file)
313 {
314 return single_open(file, dwc3_mode_show, inode->i_private);
315 }
316
317 static ssize_t dwc3_mode_write(struct file *file,
318 const char __user *ubuf, size_t count, loff_t *ppos)
319 {
320 struct seq_file *s = file->private_data;
321 struct dwc3 *dwc = s->private;
322 unsigned long flags;
323 u32 mode = 0;
324 char buf[32];
325
326 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
327 return -EFAULT;
328
329 if (!strncmp(buf, "host", 4))
330 mode |= DWC3_GCTL_PRTCAP_HOST;
331
332 if (!strncmp(buf, "device", 6))
333 mode |= DWC3_GCTL_PRTCAP_DEVICE;
334
335 if (!strncmp(buf, "otg", 3))
336 mode |= DWC3_GCTL_PRTCAP_OTG;
337
338 if (mode) {
339 spin_lock_irqsave(&dwc->lock, flags);
340 dwc3_set_mode(dwc, mode);
341 spin_unlock_irqrestore(&dwc->lock, flags);
342 }
343 return count;
344 }
345
346 static const struct file_operations dwc3_mode_fops = {
347 .open = dwc3_mode_open,
348 .write = dwc3_mode_write,
349 .read = seq_read,
350 .llseek = seq_lseek,
351 .release = single_release,
352 };
353
354 static int dwc3_testmode_show(struct seq_file *s, void *unused)
355 {
356 struct dwc3 *dwc = s->private;
357 unsigned long flags;
358 u32 reg;
359
360 spin_lock_irqsave(&dwc->lock, flags);
361 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
362 reg &= DWC3_DCTL_TSTCTRL_MASK;
363 reg >>= 1;
364 spin_unlock_irqrestore(&dwc->lock, flags);
365
366 switch (reg) {
367 case 0:
368 seq_printf(s, "no test\n");
369 break;
370 case TEST_J:
371 seq_printf(s, "test_j\n");
372 break;
373 case TEST_K:
374 seq_printf(s, "test_k\n");
375 break;
376 case TEST_SE0_NAK:
377 seq_printf(s, "test_se0_nak\n");
378 break;
379 case TEST_PACKET:
380 seq_printf(s, "test_packet\n");
381 break;
382 case TEST_FORCE_EN:
383 seq_printf(s, "test_force_enable\n");
384 break;
385 default:
386 seq_printf(s, "UNKNOWN %d\n", reg);
387 }
388
389 return 0;
390 }
391
392 static int dwc3_testmode_open(struct inode *inode, struct file *file)
393 {
394 return single_open(file, dwc3_testmode_show, inode->i_private);
395 }
396
397 static ssize_t dwc3_testmode_write(struct file *file,
398 const char __user *ubuf, size_t count, loff_t *ppos)
399 {
400 struct seq_file *s = file->private_data;
401 struct dwc3 *dwc = s->private;
402 unsigned long flags;
403 u32 testmode = 0;
404 char buf[32];
405
406 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
407 return -EFAULT;
408
409 if (!strncmp(buf, "test_j", 6))
410 testmode = TEST_J;
411 else if (!strncmp(buf, "test_k", 6))
412 testmode = TEST_K;
413 else if (!strncmp(buf, "test_se0_nak", 12))
414 testmode = TEST_SE0_NAK;
415 else if (!strncmp(buf, "test_packet", 11))
416 testmode = TEST_PACKET;
417 else if (!strncmp(buf, "test_force_enable", 17))
418 testmode = TEST_FORCE_EN;
419 else
420 testmode = 0;
421
422 spin_lock_irqsave(&dwc->lock, flags);
423 dwc3_gadget_set_test_mode(dwc, testmode);
424 spin_unlock_irqrestore(&dwc->lock, flags);
425
426 return count;
427 }
428
429 static const struct file_operations dwc3_testmode_fops = {
430 .open = dwc3_testmode_open,
431 .write = dwc3_testmode_write,
432 .read = seq_read,
433 .llseek = seq_lseek,
434 .release = single_release,
435 };
436
437 static int dwc3_link_state_show(struct seq_file *s, void *unused)
438 {
439 struct dwc3 *dwc = s->private;
440 unsigned long flags;
441 enum dwc3_link_state state;
442 u32 reg;
443
444 spin_lock_irqsave(&dwc->lock, flags);
445 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
446 state = DWC3_DSTS_USBLNKST(reg);
447 spin_unlock_irqrestore(&dwc->lock, flags);
448
449 switch (state) {
450 case DWC3_LINK_STATE_U0:
451 seq_printf(s, "U0\n");
452 break;
453 case DWC3_LINK_STATE_U1:
454 seq_printf(s, "U1\n");
455 break;
456 case DWC3_LINK_STATE_U2:
457 seq_printf(s, "U2\n");
458 break;
459 case DWC3_LINK_STATE_U3:
460 seq_printf(s, "U3\n");
461 break;
462 case DWC3_LINK_STATE_SS_DIS:
463 seq_printf(s, "SS.Disabled\n");
464 break;
465 case DWC3_LINK_STATE_RX_DET:
466 seq_printf(s, "Rx.Detect\n");
467 break;
468 case DWC3_LINK_STATE_SS_INACT:
469 seq_printf(s, "SS.Inactive\n");
470 break;
471 case DWC3_LINK_STATE_POLL:
472 seq_printf(s, "Poll\n");
473 break;
474 case DWC3_LINK_STATE_RECOV:
475 seq_printf(s, "Recovery\n");
476 break;
477 case DWC3_LINK_STATE_HRESET:
478 seq_printf(s, "HRESET\n");
479 break;
480 case DWC3_LINK_STATE_CMPLY:
481 seq_printf(s, "Compliance\n");
482 break;
483 case DWC3_LINK_STATE_LPBK:
484 seq_printf(s, "Loopback\n");
485 break;
486 case DWC3_LINK_STATE_RESET:
487 seq_printf(s, "Reset\n");
488 break;
489 case DWC3_LINK_STATE_RESUME:
490 seq_printf(s, "Resume\n");
491 break;
492 default:
493 seq_printf(s, "UNKNOWN %d\n", state);
494 }
495
496 return 0;
497 }
498
499 static int dwc3_link_state_open(struct inode *inode, struct file *file)
500 {
501 return single_open(file, dwc3_link_state_show, inode->i_private);
502 }
503
504 static ssize_t dwc3_link_state_write(struct file *file,
505 const char __user *ubuf, size_t count, loff_t *ppos)
506 {
507 struct seq_file *s = file->private_data;
508 struct dwc3 *dwc = s->private;
509 unsigned long flags;
510 enum dwc3_link_state state = 0;
511 char buf[32];
512
513 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
514 return -EFAULT;
515
516 if (!strncmp(buf, "SS.Disabled", 11))
517 state = DWC3_LINK_STATE_SS_DIS;
518 else if (!strncmp(buf, "Rx.Detect", 9))
519 state = DWC3_LINK_STATE_RX_DET;
520 else if (!strncmp(buf, "SS.Inactive", 11))
521 state = DWC3_LINK_STATE_SS_INACT;
522 else if (!strncmp(buf, "Recovery", 8))
523 state = DWC3_LINK_STATE_RECOV;
524 else if (!strncmp(buf, "Compliance", 10))
525 state = DWC3_LINK_STATE_CMPLY;
526 else if (!strncmp(buf, "Loopback", 8))
527 state = DWC3_LINK_STATE_LPBK;
528 else
529 return -EINVAL;
530
531 spin_lock_irqsave(&dwc->lock, flags);
532 dwc3_gadget_set_link_state(dwc, state);
533 spin_unlock_irqrestore(&dwc->lock, flags);
534
535 return count;
536 }
537
538 static const struct file_operations dwc3_link_state_fops = {
539 .open = dwc3_link_state_open,
540 .write = dwc3_link_state_write,
541 .read = seq_read,
542 .llseek = seq_lseek,
543 .release = single_release,
544 };
545
546 struct dwc3_ep_file_map {
547 char name[25];
548 int (*show)(struct seq_file *s, void *unused);
549 };
550
551 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
552 {
553 struct dwc3_ep *dep = s->private;
554 struct dwc3 *dwc = dep->dwc;
555 unsigned long flags;
556 u32 val;
557
558 spin_lock_irqsave(&dwc->lock, flags);
559 val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
560 seq_printf(s, "%u\n", val);
561 spin_unlock_irqrestore(&dwc->lock, flags);
562
563 return 0;
564 }
565
566 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
567 {
568 struct dwc3_ep *dep = s->private;
569 struct dwc3 *dwc = dep->dwc;
570 unsigned long flags;
571 u32 val;
572
573 spin_lock_irqsave(&dwc->lock, flags);
574 val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
575 seq_printf(s, "%u\n", val);
576 spin_unlock_irqrestore(&dwc->lock, flags);
577
578 return 0;
579 }
580
581 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
582 {
583 struct dwc3_ep *dep = s->private;
584 struct dwc3 *dwc = dep->dwc;
585 unsigned long flags;
586 u32 val;
587
588 spin_lock_irqsave(&dwc->lock, flags);
589 val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
590 seq_printf(s, "%u\n", val);
591 spin_unlock_irqrestore(&dwc->lock, flags);
592
593 return 0;
594 }
595
596 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
597 {
598 struct dwc3_ep *dep = s->private;
599 struct dwc3 *dwc = dep->dwc;
600 unsigned long flags;
601 u32 val;
602
603 spin_lock_irqsave(&dwc->lock, flags);
604 val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
605 seq_printf(s, "%u\n", val);
606 spin_unlock_irqrestore(&dwc->lock, flags);
607
608 return 0;
609 }
610
611 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
612 {
613 struct dwc3_ep *dep = s->private;
614 struct dwc3 *dwc = dep->dwc;
615 unsigned long flags;
616 u32 val;
617
618 spin_lock_irqsave(&dwc->lock, flags);
619 val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
620 seq_printf(s, "%u\n", val);
621 spin_unlock_irqrestore(&dwc->lock, flags);
622
623 return 0;
624 }
625
626 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
627 {
628 struct dwc3_ep *dep = s->private;
629 struct dwc3 *dwc = dep->dwc;
630 unsigned long flags;
631 u32 val;
632
633 spin_lock_irqsave(&dwc->lock, flags);
634 val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
635 seq_printf(s, "%u\n", val);
636 spin_unlock_irqrestore(&dwc->lock, flags);
637
638 return 0;
639 }
640
641 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
642 {
643 struct dwc3_ep *dep = s->private;
644 struct dwc3 *dwc = dep->dwc;
645 unsigned long flags;
646 u32 val;
647
648 spin_lock_irqsave(&dwc->lock, flags);
649 val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
650 seq_printf(s, "%u\n", val);
651 spin_unlock_irqrestore(&dwc->lock, flags);
652
653 return 0;
654 }
655
656 static int dwc3_ep_transfer_type_show(struct seq_file *s, void *unused)
657 {
658 struct dwc3_ep *dep = s->private;
659 struct dwc3 *dwc = dep->dwc;
660 unsigned long flags;
661
662 spin_lock_irqsave(&dwc->lock, flags);
663 if (!(dep->flags & DWC3_EP_ENABLED) ||
664 !dep->endpoint.desc) {
665 seq_printf(s, "--\n");
666 goto out;
667 }
668
669 switch (usb_endpoint_type(dep->endpoint.desc)) {
670 case USB_ENDPOINT_XFER_CONTROL:
671 seq_printf(s, "control\n");
672 break;
673 case USB_ENDPOINT_XFER_ISOC:
674 seq_printf(s, "isochronous\n");
675 break;
676 case USB_ENDPOINT_XFER_BULK:
677 seq_printf(s, "bulk\n");
678 break;
679 case USB_ENDPOINT_XFER_INT:
680 seq_printf(s, "interrupt\n");
681 break;
682 default:
683 seq_printf(s, "--\n");
684 }
685
686 out:
687 spin_unlock_irqrestore(&dwc->lock, flags);
688
689 return 0;
690 }
691
692 static inline const char *dwc3_trb_type_string(struct dwc3_trb *trb)
693 {
694 switch (DWC3_TRBCTL_TYPE(trb->ctrl)) {
695 case DWC3_TRBCTL_NORMAL:
696 return "normal";
697 case DWC3_TRBCTL_CONTROL_SETUP:
698 return "control-setup";
699 case DWC3_TRBCTL_CONTROL_STATUS2:
700 return "control-status2";
701 case DWC3_TRBCTL_CONTROL_STATUS3:
702 return "control-status3";
703 case DWC3_TRBCTL_CONTROL_DATA:
704 return "control-data";
705 case DWC3_TRBCTL_ISOCHRONOUS_FIRST:
706 return "isoc-first";
707 case DWC3_TRBCTL_ISOCHRONOUS:
708 return "isoc";
709 case DWC3_TRBCTL_LINK_TRB:
710 return "link";
711 default:
712 return "UNKNOWN";
713 }
714 }
715
716 static int dwc3_ep_trb_ring_show(struct seq_file *s, void *unused)
717 {
718 struct dwc3_ep *dep = s->private;
719 struct dwc3 *dwc = dep->dwc;
720 unsigned long flags;
721 int i;
722
723 spin_lock_irqsave(&dwc->lock, flags);
724 if (dep->number <= 1) {
725 seq_printf(s, "--\n");
726 goto out;
727 }
728
729 seq_printf(s, "enqueue pointer %d\n", dep->trb_enqueue);
730 seq_printf(s, "dequeue pointer %d\n", dep->trb_dequeue);
731 seq_printf(s, "\n--------------------------------------------------\n\n");
732 seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
733
734 for (i = 0; i < DWC3_TRB_NUM; i++) {
735 struct dwc3_trb *trb = &dep->trb_pool[i];
736
737 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d\n",
738 trb->bph, trb->bpl, trb->size,
739 dwc3_trb_type_string(trb),
740 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
741 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
742 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
743 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
744 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
745 !!(trb->ctrl & DWC3_TRB_CTRL_HWO));
746 }
747
748 out:
749 spin_unlock_irqrestore(&dwc->lock, flags);
750
751 return 0;
752 }
753
754 static struct dwc3_ep_file_map map[] = {
755 { "tx_fifo_queue", dwc3_tx_fifo_queue_show, },
756 { "rx_fifo_queue", dwc3_rx_fifo_queue_show, },
757 { "tx_request_queue", dwc3_tx_request_queue_show, },
758 { "rx_request_queue", dwc3_rx_request_queue_show, },
759 { "rx_info_queue", dwc3_rx_info_queue_show, },
760 { "descriptor_fetch_queue", dwc3_descriptor_fetch_queue_show, },
761 { "event_queue", dwc3_event_queue_show, },
762 { "transfer_type", dwc3_ep_transfer_type_show, },
763 { "trb_ring", dwc3_ep_trb_ring_show, },
764 };
765
766 static int dwc3_endpoint_open(struct inode *inode, struct file *file)
767 {
768 const char *file_name = file_dentry(file)->d_iname;
769 struct dwc3_ep_file_map *f_map;
770 int i;
771
772 for (i = 0; i < ARRAY_SIZE(map); i++) {
773 f_map = &map[i];
774
775 if (strcmp(f_map->name, file_name) == 0)
776 break;
777 }
778
779 return single_open(file, f_map->show, inode->i_private);
780 }
781
782 static const struct file_operations dwc3_endpoint_fops = {
783 .open = dwc3_endpoint_open,
784 .read = seq_read,
785 .llseek = seq_lseek,
786 .release = single_release,
787 };
788
789 static void dwc3_debugfs_create_endpoint_file(struct dwc3_ep *dep,
790 struct dentry *parent, int type)
791 {
792 struct dentry *file;
793 struct dwc3_ep_file_map *ep_file = &map[type];
794
795 file = debugfs_create_file(ep_file->name, S_IRUGO, parent, dep,
796 &dwc3_endpoint_fops);
797 }
798
799 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
800 struct dentry *parent)
801 {
802 int i;
803
804 for (i = 0; i < ARRAY_SIZE(map); i++)
805 dwc3_debugfs_create_endpoint_file(dep, parent, i);
806 }
807
808 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
809 struct dentry *parent)
810 {
811 struct dentry *dir;
812
813 dir = debugfs_create_dir(dep->name, parent);
814 if (IS_ERR_OR_NULL(dir))
815 return;
816
817 dwc3_debugfs_create_endpoint_files(dep, dir);
818 }
819
820 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
821 struct dentry *parent)
822 {
823 int i;
824
825 for (i = 0; i < dwc->num_in_eps; i++) {
826 u8 epnum = (i << 1) | 1;
827 struct dwc3_ep *dep = dwc->eps[epnum];
828
829 if (!dep)
830 continue;
831
832 dwc3_debugfs_create_endpoint_dir(dep, parent);
833 }
834
835 for (i = 0; i < dwc->num_out_eps; i++) {
836 u8 epnum = (i << 1);
837 struct dwc3_ep *dep = dwc->eps[epnum];
838
839 if (!dep)
840 continue;
841
842 dwc3_debugfs_create_endpoint_dir(dep, parent);
843 }
844 }
845
846 void dwc3_debugfs_init(struct dwc3 *dwc)
847 {
848 struct dentry *root;
849 struct dentry *file;
850
851 root = debugfs_create_dir(dev_name(dwc->dev), NULL);
852 if (IS_ERR_OR_NULL(root)) {
853 if (!root)
854 dev_err(dwc->dev, "Can't create debugfs root\n");
855 return;
856 }
857 dwc->root = root;
858
859 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
860 if (!dwc->regset) {
861 debugfs_remove_recursive(root);
862 return;
863 }
864
865 dwc->regset->regs = dwc3_regs;
866 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
867 dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
868
869 file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
870 if (!file)
871 dev_dbg(dwc->dev, "Can't create debugfs regdump\n");
872
873 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
874 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
875 dwc, &dwc3_mode_fops);
876 if (!file)
877 dev_dbg(dwc->dev, "Can't create debugfs mode\n");
878 }
879
880 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
881 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
882 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
883 dwc, &dwc3_testmode_fops);
884 if (!file)
885 dev_dbg(dwc->dev, "Can't create debugfs testmode\n");
886
887 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR,
888 root, dwc, &dwc3_link_state_fops);
889 if (!file)
890 dev_dbg(dwc->dev, "Can't create debugfs link_state\n");
891
892 dwc3_debugfs_create_endpoint_dirs(dwc, root);
893 }
894 }
895
896 void dwc3_debugfs_exit(struct dwc3 *dwc)
897 {
898 debugfs_remove_recursive(dwc->root);
899 kfree(dwc->regset);
900 }
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