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(GDBGBMU),
85 dump_register(GDBGLSPMUX),
86 dump_register(GDBGLSP),
87 dump_register(GDBGEPINFO0),
88 dump_register(GDBGEPINFO1),
89 dump_register(GPRTBIMAP_HS0),
90 dump_register(GPRTBIMAP_HS1),
91 dump_register(GPRTBIMAP_FS0),
92 dump_register(GPRTBIMAP_FS1),
93
94 dump_register(GUSB2PHYCFG(0)),
95 dump_register(GUSB2PHYCFG(1)),
96 dump_register(GUSB2PHYCFG(2)),
97 dump_register(GUSB2PHYCFG(3)),
98 dump_register(GUSB2PHYCFG(4)),
99 dump_register(GUSB2PHYCFG(5)),
100 dump_register(GUSB2PHYCFG(6)),
101 dump_register(GUSB2PHYCFG(7)),
102 dump_register(GUSB2PHYCFG(8)),
103 dump_register(GUSB2PHYCFG(9)),
104 dump_register(GUSB2PHYCFG(10)),
105 dump_register(GUSB2PHYCFG(11)),
106 dump_register(GUSB2PHYCFG(12)),
107 dump_register(GUSB2PHYCFG(13)),
108 dump_register(GUSB2PHYCFG(14)),
109 dump_register(GUSB2PHYCFG(15)),
110
111 dump_register(GUSB2I2CCTL(0)),
112 dump_register(GUSB2I2CCTL(1)),
113 dump_register(GUSB2I2CCTL(2)),
114 dump_register(GUSB2I2CCTL(3)),
115 dump_register(GUSB2I2CCTL(4)),
116 dump_register(GUSB2I2CCTL(5)),
117 dump_register(GUSB2I2CCTL(6)),
118 dump_register(GUSB2I2CCTL(7)),
119 dump_register(GUSB2I2CCTL(8)),
120 dump_register(GUSB2I2CCTL(9)),
121 dump_register(GUSB2I2CCTL(10)),
122 dump_register(GUSB2I2CCTL(11)),
123 dump_register(GUSB2I2CCTL(12)),
124 dump_register(GUSB2I2CCTL(13)),
125 dump_register(GUSB2I2CCTL(14)),
126 dump_register(GUSB2I2CCTL(15)),
127
128 dump_register(GUSB2PHYACC(0)),
129 dump_register(GUSB2PHYACC(1)),
130 dump_register(GUSB2PHYACC(2)),
131 dump_register(GUSB2PHYACC(3)),
132 dump_register(GUSB2PHYACC(4)),
133 dump_register(GUSB2PHYACC(5)),
134 dump_register(GUSB2PHYACC(6)),
135 dump_register(GUSB2PHYACC(7)),
136 dump_register(GUSB2PHYACC(8)),
137 dump_register(GUSB2PHYACC(9)),
138 dump_register(GUSB2PHYACC(10)),
139 dump_register(GUSB2PHYACC(11)),
140 dump_register(GUSB2PHYACC(12)),
141 dump_register(GUSB2PHYACC(13)),
142 dump_register(GUSB2PHYACC(14)),
143 dump_register(GUSB2PHYACC(15)),
144
145 dump_register(GUSB3PIPECTL(0)),
146 dump_register(GUSB3PIPECTL(1)),
147 dump_register(GUSB3PIPECTL(2)),
148 dump_register(GUSB3PIPECTL(3)),
149 dump_register(GUSB3PIPECTL(4)),
150 dump_register(GUSB3PIPECTL(5)),
151 dump_register(GUSB3PIPECTL(6)),
152 dump_register(GUSB3PIPECTL(7)),
153 dump_register(GUSB3PIPECTL(8)),
154 dump_register(GUSB3PIPECTL(9)),
155 dump_register(GUSB3PIPECTL(10)),
156 dump_register(GUSB3PIPECTL(11)),
157 dump_register(GUSB3PIPECTL(12)),
158 dump_register(GUSB3PIPECTL(13)),
159 dump_register(GUSB3PIPECTL(14)),
160 dump_register(GUSB3PIPECTL(15)),
161
162 dump_register(GTXFIFOSIZ(0)),
163 dump_register(GTXFIFOSIZ(1)),
164 dump_register(GTXFIFOSIZ(2)),
165 dump_register(GTXFIFOSIZ(3)),
166 dump_register(GTXFIFOSIZ(4)),
167 dump_register(GTXFIFOSIZ(5)),
168 dump_register(GTXFIFOSIZ(6)),
169 dump_register(GTXFIFOSIZ(7)),
170 dump_register(GTXFIFOSIZ(8)),
171 dump_register(GTXFIFOSIZ(9)),
172 dump_register(GTXFIFOSIZ(10)),
173 dump_register(GTXFIFOSIZ(11)),
174 dump_register(GTXFIFOSIZ(12)),
175 dump_register(GTXFIFOSIZ(13)),
176 dump_register(GTXFIFOSIZ(14)),
177 dump_register(GTXFIFOSIZ(15)),
178 dump_register(GTXFIFOSIZ(16)),
179 dump_register(GTXFIFOSIZ(17)),
180 dump_register(GTXFIFOSIZ(18)),
181 dump_register(GTXFIFOSIZ(19)),
182 dump_register(GTXFIFOSIZ(20)),
183 dump_register(GTXFIFOSIZ(21)),
184 dump_register(GTXFIFOSIZ(22)),
185 dump_register(GTXFIFOSIZ(23)),
186 dump_register(GTXFIFOSIZ(24)),
187 dump_register(GTXFIFOSIZ(25)),
188 dump_register(GTXFIFOSIZ(26)),
189 dump_register(GTXFIFOSIZ(27)),
190 dump_register(GTXFIFOSIZ(28)),
191 dump_register(GTXFIFOSIZ(29)),
192 dump_register(GTXFIFOSIZ(30)),
193 dump_register(GTXFIFOSIZ(31)),
194
195 dump_register(GRXFIFOSIZ(0)),
196 dump_register(GRXFIFOSIZ(1)),
197 dump_register(GRXFIFOSIZ(2)),
198 dump_register(GRXFIFOSIZ(3)),
199 dump_register(GRXFIFOSIZ(4)),
200 dump_register(GRXFIFOSIZ(5)),
201 dump_register(GRXFIFOSIZ(6)),
202 dump_register(GRXFIFOSIZ(7)),
203 dump_register(GRXFIFOSIZ(8)),
204 dump_register(GRXFIFOSIZ(9)),
205 dump_register(GRXFIFOSIZ(10)),
206 dump_register(GRXFIFOSIZ(11)),
207 dump_register(GRXFIFOSIZ(12)),
208 dump_register(GRXFIFOSIZ(13)),
209 dump_register(GRXFIFOSIZ(14)),
210 dump_register(GRXFIFOSIZ(15)),
211 dump_register(GRXFIFOSIZ(16)),
212 dump_register(GRXFIFOSIZ(17)),
213 dump_register(GRXFIFOSIZ(18)),
214 dump_register(GRXFIFOSIZ(19)),
215 dump_register(GRXFIFOSIZ(20)),
216 dump_register(GRXFIFOSIZ(21)),
217 dump_register(GRXFIFOSIZ(22)),
218 dump_register(GRXFIFOSIZ(23)),
219 dump_register(GRXFIFOSIZ(24)),
220 dump_register(GRXFIFOSIZ(25)),
221 dump_register(GRXFIFOSIZ(26)),
222 dump_register(GRXFIFOSIZ(27)),
223 dump_register(GRXFIFOSIZ(28)),
224 dump_register(GRXFIFOSIZ(29)),
225 dump_register(GRXFIFOSIZ(30)),
226 dump_register(GRXFIFOSIZ(31)),
227
228 dump_register(GEVNTADRLO(0)),
229 dump_register(GEVNTADRHI(0)),
230 dump_register(GEVNTSIZ(0)),
231 dump_register(GEVNTCOUNT(0)),
232
233 dump_register(GHWPARAMS8),
234 dump_register(DCFG),
235 dump_register(DCTL),
236 dump_register(DEVTEN),
237 dump_register(DSTS),
238 dump_register(DGCMDPAR),
239 dump_register(DGCMD),
240 dump_register(DALEPENA),
241
242 dump_ep_register_set(0),
243 dump_ep_register_set(1),
244 dump_ep_register_set(2),
245 dump_ep_register_set(3),
246 dump_ep_register_set(4),
247 dump_ep_register_set(5),
248 dump_ep_register_set(6),
249 dump_ep_register_set(7),
250 dump_ep_register_set(8),
251 dump_ep_register_set(9),
252 dump_ep_register_set(10),
253 dump_ep_register_set(11),
254 dump_ep_register_set(12),
255 dump_ep_register_set(13),
256 dump_ep_register_set(14),
257 dump_ep_register_set(15),
258 dump_ep_register_set(16),
259 dump_ep_register_set(17),
260 dump_ep_register_set(18),
261 dump_ep_register_set(19),
262 dump_ep_register_set(20),
263 dump_ep_register_set(21),
264 dump_ep_register_set(22),
265 dump_ep_register_set(23),
266 dump_ep_register_set(24),
267 dump_ep_register_set(25),
268 dump_ep_register_set(26),
269 dump_ep_register_set(27),
270 dump_ep_register_set(28),
271 dump_ep_register_set(29),
272 dump_ep_register_set(30),
273 dump_ep_register_set(31),
274
275 dump_register(OCFG),
276 dump_register(OCTL),
277 dump_register(OEVT),
278 dump_register(OEVTEN),
279 dump_register(OSTS),
280 };
281
dwc3_mode_show(struct seq_file * s,void * unused)282 static int dwc3_mode_show(struct seq_file *s, void *unused)
283 {
284 struct dwc3 *dwc = s->private;
285 unsigned long flags;
286 u32 reg;
287
288 spin_lock_irqsave(&dwc->lock, flags);
289 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
290 spin_unlock_irqrestore(&dwc->lock, flags);
291
292 switch (DWC3_GCTL_PRTCAP(reg)) {
293 case DWC3_GCTL_PRTCAP_HOST:
294 seq_printf(s, "host\n");
295 break;
296 case DWC3_GCTL_PRTCAP_DEVICE:
297 seq_printf(s, "device\n");
298 break;
299 case DWC3_GCTL_PRTCAP_OTG:
300 seq_printf(s, "otg\n");
301 break;
302 default:
303 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
304 }
305
306 return 0;
307 }
308
dwc3_mode_open(struct inode * inode,struct file * file)309 static int dwc3_mode_open(struct inode *inode, struct file *file)
310 {
311 return single_open(file, dwc3_mode_show, inode->i_private);
312 }
313
dwc3_mode_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)314 static ssize_t dwc3_mode_write(struct file *file,
315 const char __user *ubuf, size_t count, loff_t *ppos)
316 {
317 struct seq_file *s = file->private_data;
318 struct dwc3 *dwc = s->private;
319 u32 mode = 0;
320 char buf[32];
321
322 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
323 return -EFAULT;
324
325 if (!strncmp(buf, "host", 4))
326 mode = DWC3_GCTL_PRTCAP_HOST;
327
328 if (!strncmp(buf, "device", 6))
329 mode = DWC3_GCTL_PRTCAP_DEVICE;
330
331 if (!strncmp(buf, "otg", 3))
332 mode = DWC3_GCTL_PRTCAP_OTG;
333
334 dwc3_set_mode(dwc, mode);
335
336 return count;
337 }
338
339 static const struct file_operations dwc3_mode_fops = {
340 .open = dwc3_mode_open,
341 .write = dwc3_mode_write,
342 .read = seq_read,
343 .llseek = seq_lseek,
344 .release = single_release,
345 };
346
dwc3_testmode_show(struct seq_file * s,void * unused)347 static int dwc3_testmode_show(struct seq_file *s, void *unused)
348 {
349 struct dwc3 *dwc = s->private;
350 unsigned long flags;
351 u32 reg;
352
353 spin_lock_irqsave(&dwc->lock, flags);
354 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
355 reg &= DWC3_DCTL_TSTCTRL_MASK;
356 reg >>= 1;
357 spin_unlock_irqrestore(&dwc->lock, flags);
358
359 switch (reg) {
360 case 0:
361 seq_printf(s, "no test\n");
362 break;
363 case TEST_J:
364 seq_printf(s, "test_j\n");
365 break;
366 case TEST_K:
367 seq_printf(s, "test_k\n");
368 break;
369 case TEST_SE0_NAK:
370 seq_printf(s, "test_se0_nak\n");
371 break;
372 case TEST_PACKET:
373 seq_printf(s, "test_packet\n");
374 break;
375 case TEST_FORCE_EN:
376 seq_printf(s, "test_force_enable\n");
377 break;
378 default:
379 seq_printf(s, "UNKNOWN %d\n", reg);
380 }
381
382 return 0;
383 }
384
dwc3_testmode_open(struct inode * inode,struct file * file)385 static int dwc3_testmode_open(struct inode *inode, struct file *file)
386 {
387 return single_open(file, dwc3_testmode_show, inode->i_private);
388 }
389
dwc3_testmode_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)390 static ssize_t dwc3_testmode_write(struct file *file,
391 const char __user *ubuf, size_t count, loff_t *ppos)
392 {
393 struct seq_file *s = file->private_data;
394 struct dwc3 *dwc = s->private;
395 unsigned long flags;
396 u32 testmode = 0;
397 char buf[32];
398
399 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
400 return -EFAULT;
401
402 if (!strncmp(buf, "test_j", 6))
403 testmode = TEST_J;
404 else if (!strncmp(buf, "test_k", 6))
405 testmode = TEST_K;
406 else if (!strncmp(buf, "test_se0_nak", 12))
407 testmode = TEST_SE0_NAK;
408 else if (!strncmp(buf, "test_packet", 11))
409 testmode = TEST_PACKET;
410 else if (!strncmp(buf, "test_force_enable", 17))
411 testmode = TEST_FORCE_EN;
412 else
413 testmode = 0;
414
415 spin_lock_irqsave(&dwc->lock, flags);
416 dwc3_gadget_set_test_mode(dwc, testmode);
417 spin_unlock_irqrestore(&dwc->lock, flags);
418
419 return count;
420 }
421
422 static const struct file_operations dwc3_testmode_fops = {
423 .open = dwc3_testmode_open,
424 .write = dwc3_testmode_write,
425 .read = seq_read,
426 .llseek = seq_lseek,
427 .release = single_release,
428 };
429
dwc3_link_state_show(struct seq_file * s,void * unused)430 static int dwc3_link_state_show(struct seq_file *s, void *unused)
431 {
432 struct dwc3 *dwc = s->private;
433 unsigned long flags;
434 enum dwc3_link_state state;
435 u32 reg;
436 u8 speed;
437
438 spin_lock_irqsave(&dwc->lock, flags);
439 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
440 state = DWC3_DSTS_USBLNKST(reg);
441 speed = reg & DWC3_DSTS_CONNECTSPD;
442
443 seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
444 dwc3_gadget_link_string(state) :
445 dwc3_gadget_hs_link_string(state));
446 spin_unlock_irqrestore(&dwc->lock, flags);
447
448 return 0;
449 }
450
dwc3_link_state_open(struct inode * inode,struct file * file)451 static int dwc3_link_state_open(struct inode *inode, struct file *file)
452 {
453 return single_open(file, dwc3_link_state_show, inode->i_private);
454 }
455
dwc3_link_state_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)456 static ssize_t dwc3_link_state_write(struct file *file,
457 const char __user *ubuf, size_t count, loff_t *ppos)
458 {
459 struct seq_file *s = file->private_data;
460 struct dwc3 *dwc = s->private;
461 unsigned long flags;
462 enum dwc3_link_state state = 0;
463 char buf[32];
464 u32 reg;
465 u8 speed;
466
467 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
468 return -EFAULT;
469
470 if (!strncmp(buf, "SS.Disabled", 11))
471 state = DWC3_LINK_STATE_SS_DIS;
472 else if (!strncmp(buf, "Rx.Detect", 9))
473 state = DWC3_LINK_STATE_RX_DET;
474 else if (!strncmp(buf, "SS.Inactive", 11))
475 state = DWC3_LINK_STATE_SS_INACT;
476 else if (!strncmp(buf, "Recovery", 8))
477 state = DWC3_LINK_STATE_RECOV;
478 else if (!strncmp(buf, "Compliance", 10))
479 state = DWC3_LINK_STATE_CMPLY;
480 else if (!strncmp(buf, "Loopback", 8))
481 state = DWC3_LINK_STATE_LPBK;
482 else
483 return -EINVAL;
484
485 spin_lock_irqsave(&dwc->lock, flags);
486 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
487 speed = reg & DWC3_DSTS_CONNECTSPD;
488
489 if (speed < DWC3_DSTS_SUPERSPEED &&
490 state != DWC3_LINK_STATE_RECOV) {
491 spin_unlock_irqrestore(&dwc->lock, flags);
492 return -EINVAL;
493 }
494
495 dwc3_gadget_set_link_state(dwc, state);
496 spin_unlock_irqrestore(&dwc->lock, flags);
497
498 return count;
499 }
500
501 static const struct file_operations dwc3_link_state_fops = {
502 .open = dwc3_link_state_open,
503 .write = dwc3_link_state_write,
504 .read = seq_read,
505 .llseek = seq_lseek,
506 .release = single_release,
507 };
508
509 struct dwc3_ep_file_map {
510 const char name[25];
511 const struct file_operations *const fops;
512 };
513
dwc3_tx_fifo_queue_show(struct seq_file * s,void * unused)514 static int dwc3_tx_fifo_queue_show(struct seq_file *s, void *unused)
515 {
516 struct dwc3_ep *dep = s->private;
517 struct dwc3 *dwc = dep->dwc;
518 unsigned long flags;
519 u32 val;
520
521 spin_lock_irqsave(&dwc->lock, flags);
522 val = dwc3_core_fifo_space(dep, DWC3_TXFIFOQ);
523 seq_printf(s, "%u\n", val);
524 spin_unlock_irqrestore(&dwc->lock, flags);
525
526 return 0;
527 }
528
dwc3_rx_fifo_queue_show(struct seq_file * s,void * unused)529 static int dwc3_rx_fifo_queue_show(struct seq_file *s, void *unused)
530 {
531 struct dwc3_ep *dep = s->private;
532 struct dwc3 *dwc = dep->dwc;
533 unsigned long flags;
534 u32 val;
535
536 spin_lock_irqsave(&dwc->lock, flags);
537 val = dwc3_core_fifo_space(dep, DWC3_RXFIFOQ);
538 seq_printf(s, "%u\n", val);
539 spin_unlock_irqrestore(&dwc->lock, flags);
540
541 return 0;
542 }
543
dwc3_tx_request_queue_show(struct seq_file * s,void * unused)544 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
545 {
546 struct dwc3_ep *dep = s->private;
547 struct dwc3 *dwc = dep->dwc;
548 unsigned long flags;
549 u32 val;
550
551 spin_lock_irqsave(&dwc->lock, flags);
552 val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
553 seq_printf(s, "%u\n", val);
554 spin_unlock_irqrestore(&dwc->lock, flags);
555
556 return 0;
557 }
558
dwc3_rx_request_queue_show(struct seq_file * s,void * unused)559 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
560 {
561 struct dwc3_ep *dep = s->private;
562 struct dwc3 *dwc = dep->dwc;
563 unsigned long flags;
564 u32 val;
565
566 spin_lock_irqsave(&dwc->lock, flags);
567 val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
568 seq_printf(s, "%u\n", val);
569 spin_unlock_irqrestore(&dwc->lock, flags);
570
571 return 0;
572 }
573
dwc3_rx_info_queue_show(struct seq_file * s,void * unused)574 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
575 {
576 struct dwc3_ep *dep = s->private;
577 struct dwc3 *dwc = dep->dwc;
578 unsigned long flags;
579 u32 val;
580
581 spin_lock_irqsave(&dwc->lock, flags);
582 val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
583 seq_printf(s, "%u\n", val);
584 spin_unlock_irqrestore(&dwc->lock, flags);
585
586 return 0;
587 }
588
dwc3_descriptor_fetch_queue_show(struct seq_file * s,void * unused)589 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
590 {
591 struct dwc3_ep *dep = s->private;
592 struct dwc3 *dwc = dep->dwc;
593 unsigned long flags;
594 u32 val;
595
596 spin_lock_irqsave(&dwc->lock, flags);
597 val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
598 seq_printf(s, "%u\n", val);
599 spin_unlock_irqrestore(&dwc->lock, flags);
600
601 return 0;
602 }
603
dwc3_event_queue_show(struct seq_file * s,void * unused)604 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
605 {
606 struct dwc3_ep *dep = s->private;
607 struct dwc3 *dwc = dep->dwc;
608 unsigned long flags;
609 u32 val;
610
611 spin_lock_irqsave(&dwc->lock, flags);
612 val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
613 seq_printf(s, "%u\n", val);
614 spin_unlock_irqrestore(&dwc->lock, flags);
615
616 return 0;
617 }
618
dwc3_transfer_type_show(struct seq_file * s,void * unused)619 static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
620 {
621 struct dwc3_ep *dep = s->private;
622 struct dwc3 *dwc = dep->dwc;
623 unsigned long flags;
624
625 spin_lock_irqsave(&dwc->lock, flags);
626 if (!(dep->flags & DWC3_EP_ENABLED) ||
627 !dep->endpoint.desc) {
628 seq_printf(s, "--\n");
629 goto out;
630 }
631
632 switch (usb_endpoint_type(dep->endpoint.desc)) {
633 case USB_ENDPOINT_XFER_CONTROL:
634 seq_printf(s, "control\n");
635 break;
636 case USB_ENDPOINT_XFER_ISOC:
637 seq_printf(s, "isochronous\n");
638 break;
639 case USB_ENDPOINT_XFER_BULK:
640 seq_printf(s, "bulk\n");
641 break;
642 case USB_ENDPOINT_XFER_INT:
643 seq_printf(s, "interrupt\n");
644 break;
645 default:
646 seq_printf(s, "--\n");
647 }
648
649 out:
650 spin_unlock_irqrestore(&dwc->lock, flags);
651
652 return 0;
653 }
654
dwc3_trb_ring_show(struct seq_file * s,void * unused)655 static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
656 {
657 struct dwc3_ep *dep = s->private;
658 struct dwc3 *dwc = dep->dwc;
659 unsigned long flags;
660 int i;
661
662 spin_lock_irqsave(&dwc->lock, flags);
663 if (dep->number <= 1) {
664 seq_printf(s, "--\n");
665 goto out;
666 }
667
668 seq_printf(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
669
670 for (i = 0; i < DWC3_TRB_NUM; i++) {
671 struct dwc3_trb *trb = &dep->trb_pool[i];
672 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
673
674 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d %c%c\n",
675 trb->bph, trb->bpl, trb->size,
676 dwc3_trb_type_string(type),
677 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
678 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
679 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
680 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
681 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
682 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
683 dep->trb_enqueue == i ? 'E' : ' ',
684 dep->trb_dequeue == i ? 'D' : ' ');
685 }
686
687 out:
688 spin_unlock_irqrestore(&dwc->lock, flags);
689
690 return 0;
691 }
692
693 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_queue);
694 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_queue);
695 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
696 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
697 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
698 DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
699 DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
700 DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
701 DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
702
703 static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
704 { "tx_fifo_queue", &dwc3_tx_fifo_queue_fops, },
705 { "rx_fifo_queue", &dwc3_rx_fifo_queue_fops, },
706 { "tx_request_queue", &dwc3_tx_request_queue_fops, },
707 { "rx_request_queue", &dwc3_rx_request_queue_fops, },
708 { "rx_info_queue", &dwc3_rx_info_queue_fops, },
709 { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
710 { "event_queue", &dwc3_event_queue_fops, },
711 { "transfer_type", &dwc3_transfer_type_fops, },
712 { "trb_ring", &dwc3_trb_ring_fops, },
713 };
714
dwc3_debugfs_create_endpoint_files(struct dwc3_ep * dep,struct dentry * parent)715 static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
716 struct dentry *parent)
717 {
718 int i;
719
720 for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
721 const struct file_operations *fops = dwc3_ep_file_map[i].fops;
722 const char *name = dwc3_ep_file_map[i].name;
723
724 debugfs_create_file(name, S_IRUGO, parent, dep, fops);
725 }
726 }
727
dwc3_debugfs_create_endpoint_dir(struct dwc3_ep * dep,struct dentry * parent)728 static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
729 struct dentry *parent)
730 {
731 struct dentry *dir;
732
733 dir = debugfs_create_dir(dep->name, parent);
734 dwc3_debugfs_create_endpoint_files(dep, dir);
735 }
736
dwc3_debugfs_create_endpoint_dirs(struct dwc3 * dwc,struct dentry * parent)737 static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
738 struct dentry *parent)
739 {
740 int i;
741
742 for (i = 0; i < dwc->num_eps; i++) {
743 struct dwc3_ep *dep = dwc->eps[i];
744
745 if (!dep)
746 continue;
747
748 dwc3_debugfs_create_endpoint_dir(dep, parent);
749 }
750 }
751
dwc3_debugfs_init(struct dwc3 * dwc)752 void dwc3_debugfs_init(struct dwc3 *dwc)
753 {
754 struct dentry *root;
755
756 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
757 if (!dwc->regset)
758 return;
759
760 dwc->regset->regs = dwc3_regs;
761 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
762 dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
763
764 root = debugfs_create_dir(dev_name(dwc->dev), NULL);
765 dwc->root = root;
766
767 debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
768
769 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
770 debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, dwc,
771 &dwc3_mode_fops);
772 }
773
774 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
775 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
776 debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, dwc,
777 &dwc3_testmode_fops);
778 debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, dwc,
779 &dwc3_link_state_fops);
780 dwc3_debugfs_create_endpoint_dirs(dwc, root);
781 }
782 }
783
dwc3_debugfs_exit(struct dwc3 * dwc)784 void dwc3_debugfs_exit(struct dwc3 *dwc)
785 {
786 debugfs_remove_recursive(dwc->root);
787 kfree(dwc->regset);
788 }
789