0cc5a015451b65d5601febf82a239fd98d0cdda1
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 */
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>
29 #include <linux/usb/ch9.h>
30 #include <linux/usb/drd.h>
32 #include "core.h"
33 #include "gadget.h"
34 #include "io.h"
35 #include "debug.h"
37 #define dump_register(nm) \
38 { \
39 .name = __stringify(nm), \
40 .offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \
41 }
43 static const struct debugfs_reg32 dwc3_regs[] = {
44 dump_register(GSBUSCFG0),
45 dump_register(GSBUSCFG1),
46 dump_register(GTXTHRCFG),
47 dump_register(GRXTHRCFG),
48 dump_register(GCTL),
49 dump_register(GEVTEN),
50 dump_register(GSTS),
51 dump_register(GSNPSID),
52 dump_register(GGPIO),
53 dump_register(GUID),
54 dump_register(GUCTL),
55 dump_register(GBUSERRADDR0),
56 dump_register(GBUSERRADDR1),
57 dump_register(GPRTBIMAP0),
58 dump_register(GPRTBIMAP1),
59 dump_register(GHWPARAMS0),
60 dump_register(GHWPARAMS1),
61 dump_register(GHWPARAMS2),
62 dump_register(GHWPARAMS3),
63 dump_register(GHWPARAMS4),
64 dump_register(GHWPARAMS5),
65 dump_register(GHWPARAMS6),
66 dump_register(GHWPARAMS7),
67 dump_register(GDBGFIFOSPACE),
68 dump_register(GDBGLTSSM),
69 dump_register(GPRTBIMAP_HS0),
70 dump_register(GPRTBIMAP_HS1),
71 dump_register(GPRTBIMAP_FS0),
72 dump_register(GPRTBIMAP_FS1),
74 dump_register(GUSB2PHYCFG(0)),
75 dump_register(GUSB2PHYCFG(1)),
76 dump_register(GUSB2PHYCFG(2)),
77 dump_register(GUSB2PHYCFG(3)),
78 dump_register(GUSB2PHYCFG(4)),
79 dump_register(GUSB2PHYCFG(5)),
80 dump_register(GUSB2PHYCFG(6)),
81 dump_register(GUSB2PHYCFG(7)),
82 dump_register(GUSB2PHYCFG(8)),
83 dump_register(GUSB2PHYCFG(9)),
84 dump_register(GUSB2PHYCFG(10)),
85 dump_register(GUSB2PHYCFG(11)),
86 dump_register(GUSB2PHYCFG(12)),
87 dump_register(GUSB2PHYCFG(13)),
88 dump_register(GUSB2PHYCFG(14)),
89 dump_register(GUSB2PHYCFG(15)),
91 dump_register(GUSB2I2CCTL(0)),
92 dump_register(GUSB2I2CCTL(1)),
93 dump_register(GUSB2I2CCTL(2)),
94 dump_register(GUSB2I2CCTL(3)),
95 dump_register(GUSB2I2CCTL(4)),
96 dump_register(GUSB2I2CCTL(5)),
97 dump_register(GUSB2I2CCTL(6)),
98 dump_register(GUSB2I2CCTL(7)),
99 dump_register(GUSB2I2CCTL(8)),
100 dump_register(GUSB2I2CCTL(9)),
101 dump_register(GUSB2I2CCTL(10)),
102 dump_register(GUSB2I2CCTL(11)),
103 dump_register(GUSB2I2CCTL(12)),
104 dump_register(GUSB2I2CCTL(13)),
105 dump_register(GUSB2I2CCTL(14)),
106 dump_register(GUSB2I2CCTL(15)),
108 dump_register(GUSB2PHYACC(0)),
109 dump_register(GUSB2PHYACC(1)),
110 dump_register(GUSB2PHYACC(2)),
111 dump_register(GUSB2PHYACC(3)),
112 dump_register(GUSB2PHYACC(4)),
113 dump_register(GUSB2PHYACC(5)),
114 dump_register(GUSB2PHYACC(6)),
115 dump_register(GUSB2PHYACC(7)),
116 dump_register(GUSB2PHYACC(8)),
117 dump_register(GUSB2PHYACC(9)),
118 dump_register(GUSB2PHYACC(10)),
119 dump_register(GUSB2PHYACC(11)),
120 dump_register(GUSB2PHYACC(12)),
121 dump_register(GUSB2PHYACC(13)),
122 dump_register(GUSB2PHYACC(14)),
123 dump_register(GUSB2PHYACC(15)),
125 dump_register(GUSB3PIPECTL(0)),
126 dump_register(GUSB3PIPECTL(1)),
127 dump_register(GUSB3PIPECTL(2)),
128 dump_register(GUSB3PIPECTL(3)),
129 dump_register(GUSB3PIPECTL(4)),
130 dump_register(GUSB3PIPECTL(5)),
131 dump_register(GUSB3PIPECTL(6)),
132 dump_register(GUSB3PIPECTL(7)),
133 dump_register(GUSB3PIPECTL(8)),
134 dump_register(GUSB3PIPECTL(9)),
135 dump_register(GUSB3PIPECTL(10)),
136 dump_register(GUSB3PIPECTL(11)),
137 dump_register(GUSB3PIPECTL(12)),
138 dump_register(GUSB3PIPECTL(13)),
139 dump_register(GUSB3PIPECTL(14)),
140 dump_register(GUSB3PIPECTL(15)),
142 dump_register(GTXFIFOSIZ(0)),
143 dump_register(GTXFIFOSIZ(1)),
144 dump_register(GTXFIFOSIZ(2)),
145 dump_register(GTXFIFOSIZ(3)),
146 dump_register(GTXFIFOSIZ(4)),
147 dump_register(GTXFIFOSIZ(5)),
148 dump_register(GTXFIFOSIZ(6)),
149 dump_register(GTXFIFOSIZ(7)),
150 dump_register(GTXFIFOSIZ(8)),
151 dump_register(GTXFIFOSIZ(9)),
152 dump_register(GTXFIFOSIZ(10)),
153 dump_register(GTXFIFOSIZ(11)),
154 dump_register(GTXFIFOSIZ(12)),
155 dump_register(GTXFIFOSIZ(13)),
156 dump_register(GTXFIFOSIZ(14)),
157 dump_register(GTXFIFOSIZ(15)),
158 dump_register(GTXFIFOSIZ(16)),
159 dump_register(GTXFIFOSIZ(17)),
160 dump_register(GTXFIFOSIZ(18)),
161 dump_register(GTXFIFOSIZ(19)),
162 dump_register(GTXFIFOSIZ(20)),
163 dump_register(GTXFIFOSIZ(21)),
164 dump_register(GTXFIFOSIZ(22)),
165 dump_register(GTXFIFOSIZ(23)),
166 dump_register(GTXFIFOSIZ(24)),
167 dump_register(GTXFIFOSIZ(25)),
168 dump_register(GTXFIFOSIZ(26)),
169 dump_register(GTXFIFOSIZ(27)),
170 dump_register(GTXFIFOSIZ(28)),
171 dump_register(GTXFIFOSIZ(29)),
172 dump_register(GTXFIFOSIZ(30)),
173 dump_register(GTXFIFOSIZ(31)),
175 dump_register(GRXFIFOSIZ(0)),
176 dump_register(GRXFIFOSIZ(1)),
177 dump_register(GRXFIFOSIZ(2)),
178 dump_register(GRXFIFOSIZ(3)),
179 dump_register(GRXFIFOSIZ(4)),
180 dump_register(GRXFIFOSIZ(5)),
181 dump_register(GRXFIFOSIZ(6)),
182 dump_register(GRXFIFOSIZ(7)),
183 dump_register(GRXFIFOSIZ(8)),
184 dump_register(GRXFIFOSIZ(9)),
185 dump_register(GRXFIFOSIZ(10)),
186 dump_register(GRXFIFOSIZ(11)),
187 dump_register(GRXFIFOSIZ(12)),
188 dump_register(GRXFIFOSIZ(13)),
189 dump_register(GRXFIFOSIZ(14)),
190 dump_register(GRXFIFOSIZ(15)),
191 dump_register(GRXFIFOSIZ(16)),
192 dump_register(GRXFIFOSIZ(17)),
193 dump_register(GRXFIFOSIZ(18)),
194 dump_register(GRXFIFOSIZ(19)),
195 dump_register(GRXFIFOSIZ(20)),
196 dump_register(GRXFIFOSIZ(21)),
197 dump_register(GRXFIFOSIZ(22)),
198 dump_register(GRXFIFOSIZ(23)),
199 dump_register(GRXFIFOSIZ(24)),
200 dump_register(GRXFIFOSIZ(25)),
201 dump_register(GRXFIFOSIZ(26)),
202 dump_register(GRXFIFOSIZ(27)),
203 dump_register(GRXFIFOSIZ(28)),
204 dump_register(GRXFIFOSIZ(29)),
205 dump_register(GRXFIFOSIZ(30)),
206 dump_register(GRXFIFOSIZ(31)),
208 dump_register(GEVNTADRLO(0)),
209 dump_register(GEVNTADRHI(0)),
210 dump_register(GEVNTSIZ(0)),
211 dump_register(GEVNTCOUNT(0)),
213 dump_register(GHWPARAMS8),
214 dump_register(DCFG),
215 dump_register(DCTL),
216 dump_register(DEVTEN),
217 dump_register(DSTS),
218 dump_register(DGCMDPAR),
219 dump_register(DGCMD),
220 dump_register(DALEPENA),
222 dump_register(DEPCMDPAR2(0)),
223 dump_register(DEPCMDPAR2(1)),
224 dump_register(DEPCMDPAR2(2)),
225 dump_register(DEPCMDPAR2(3)),
226 dump_register(DEPCMDPAR2(4)),
227 dump_register(DEPCMDPAR2(5)),
228 dump_register(DEPCMDPAR2(6)),
229 dump_register(DEPCMDPAR2(7)),
230 dump_register(DEPCMDPAR2(8)),
231 dump_register(DEPCMDPAR2(9)),
232 dump_register(DEPCMDPAR2(10)),
233 dump_register(DEPCMDPAR2(11)),
234 dump_register(DEPCMDPAR2(12)),
235 dump_register(DEPCMDPAR2(13)),
236 dump_register(DEPCMDPAR2(14)),
237 dump_register(DEPCMDPAR2(15)),
238 dump_register(DEPCMDPAR2(16)),
239 dump_register(DEPCMDPAR2(17)),
240 dump_register(DEPCMDPAR2(18)),
241 dump_register(DEPCMDPAR2(19)),
242 dump_register(DEPCMDPAR2(20)),
243 dump_register(DEPCMDPAR2(21)),
244 dump_register(DEPCMDPAR2(22)),
245 dump_register(DEPCMDPAR2(23)),
246 dump_register(DEPCMDPAR2(24)),
247 dump_register(DEPCMDPAR2(25)),
248 dump_register(DEPCMDPAR2(26)),
249 dump_register(DEPCMDPAR2(27)),
250 dump_register(DEPCMDPAR2(28)),
251 dump_register(DEPCMDPAR2(29)),
252 dump_register(DEPCMDPAR2(30)),
253 dump_register(DEPCMDPAR2(31)),
255 dump_register(DEPCMDPAR1(0)),
256 dump_register(DEPCMDPAR1(1)),
257 dump_register(DEPCMDPAR1(2)),
258 dump_register(DEPCMDPAR1(3)),
259 dump_register(DEPCMDPAR1(4)),
260 dump_register(DEPCMDPAR1(5)),
261 dump_register(DEPCMDPAR1(6)),
262 dump_register(DEPCMDPAR1(7)),
263 dump_register(DEPCMDPAR1(8)),
264 dump_register(DEPCMDPAR1(9)),
265 dump_register(DEPCMDPAR1(10)),
266 dump_register(DEPCMDPAR1(11)),
267 dump_register(DEPCMDPAR1(12)),
268 dump_register(DEPCMDPAR1(13)),
269 dump_register(DEPCMDPAR1(14)),
270 dump_register(DEPCMDPAR1(15)),
271 dump_register(DEPCMDPAR1(16)),
272 dump_register(DEPCMDPAR1(17)),
273 dump_register(DEPCMDPAR1(18)),
274 dump_register(DEPCMDPAR1(19)),
275 dump_register(DEPCMDPAR1(20)),
276 dump_register(DEPCMDPAR1(21)),
277 dump_register(DEPCMDPAR1(22)),
278 dump_register(DEPCMDPAR1(23)),
279 dump_register(DEPCMDPAR1(24)),
280 dump_register(DEPCMDPAR1(25)),
281 dump_register(DEPCMDPAR1(26)),
282 dump_register(DEPCMDPAR1(27)),
283 dump_register(DEPCMDPAR1(28)),
284 dump_register(DEPCMDPAR1(29)),
285 dump_register(DEPCMDPAR1(30)),
286 dump_register(DEPCMDPAR1(31)),
288 dump_register(DEPCMDPAR0(0)),
289 dump_register(DEPCMDPAR0(1)),
290 dump_register(DEPCMDPAR0(2)),
291 dump_register(DEPCMDPAR0(3)),
292 dump_register(DEPCMDPAR0(4)),
293 dump_register(DEPCMDPAR0(5)),
294 dump_register(DEPCMDPAR0(6)),
295 dump_register(DEPCMDPAR0(7)),
296 dump_register(DEPCMDPAR0(8)),
297 dump_register(DEPCMDPAR0(9)),
298 dump_register(DEPCMDPAR0(10)),
299 dump_register(DEPCMDPAR0(11)),
300 dump_register(DEPCMDPAR0(12)),
301 dump_register(DEPCMDPAR0(13)),
302 dump_register(DEPCMDPAR0(14)),
303 dump_register(DEPCMDPAR0(15)),
304 dump_register(DEPCMDPAR0(16)),
305 dump_register(DEPCMDPAR0(17)),
306 dump_register(DEPCMDPAR0(18)),
307 dump_register(DEPCMDPAR0(19)),
308 dump_register(DEPCMDPAR0(20)),
309 dump_register(DEPCMDPAR0(21)),
310 dump_register(DEPCMDPAR0(22)),
311 dump_register(DEPCMDPAR0(23)),
312 dump_register(DEPCMDPAR0(24)),
313 dump_register(DEPCMDPAR0(25)),
314 dump_register(DEPCMDPAR0(26)),
315 dump_register(DEPCMDPAR0(27)),
316 dump_register(DEPCMDPAR0(28)),
317 dump_register(DEPCMDPAR0(29)),
318 dump_register(DEPCMDPAR0(30)),
319 dump_register(DEPCMDPAR0(31)),
321 dump_register(DEPCMD(0)),
322 dump_register(DEPCMD(1)),
323 dump_register(DEPCMD(2)),
324 dump_register(DEPCMD(3)),
325 dump_register(DEPCMD(4)),
326 dump_register(DEPCMD(5)),
327 dump_register(DEPCMD(6)),
328 dump_register(DEPCMD(7)),
329 dump_register(DEPCMD(8)),
330 dump_register(DEPCMD(9)),
331 dump_register(DEPCMD(10)),
332 dump_register(DEPCMD(11)),
333 dump_register(DEPCMD(12)),
334 dump_register(DEPCMD(13)),
335 dump_register(DEPCMD(14)),
336 dump_register(DEPCMD(15)),
337 dump_register(DEPCMD(16)),
338 dump_register(DEPCMD(17)),
339 dump_register(DEPCMD(18)),
340 dump_register(DEPCMD(19)),
341 dump_register(DEPCMD(20)),
342 dump_register(DEPCMD(21)),
343 dump_register(DEPCMD(22)),
344 dump_register(DEPCMD(23)),
345 dump_register(DEPCMD(24)),
346 dump_register(DEPCMD(25)),
347 dump_register(DEPCMD(26)),
348 dump_register(DEPCMD(27)),
349 dump_register(DEPCMD(28)),
350 dump_register(DEPCMD(29)),
351 dump_register(DEPCMD(30)),
352 dump_register(DEPCMD(31)),
354 dump_register(OCFG),
355 dump_register(OCTL),
356 dump_register(OEVT),
357 dump_register(OEVTEN),
358 dump_register(OSTS),
359 };
361 static int dwc3_mode_show(struct seq_file *s, void *unused)
362 {
363 struct dwc3 *dwc = s->private;
364 unsigned long flags;
365 u32 reg;
367 spin_lock_irqsave(&dwc->lock, flags);
368 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
369 spin_unlock_irqrestore(&dwc->lock, flags);
371 switch (DWC3_GCTL_PRTCAP(reg)) {
372 case DWC3_GCTL_PRTCAP_HOST:
373 seq_printf(s, "host\n");
374 break;
375 case DWC3_GCTL_PRTCAP_DEVICE:
376 seq_printf(s, "device\n");
377 break;
378 case DWC3_GCTL_PRTCAP_OTG:
379 seq_printf(s, "OTG\n");
380 break;
381 default:
382 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
383 }
385 return 0;
386 }
388 static int dwc3_mode_open(struct inode *inode, struct file *file)
389 {
390 return single_open(file, dwc3_mode_show, inode->i_private);
391 }
393 static ssize_t dwc3_mode_write(struct file *file,
394 const char __user *ubuf, size_t count, loff_t *ppos)
395 {
396 struct seq_file *s = file->private_data;
397 struct dwc3 *dwc = s->private;
398 unsigned long flags;
399 u32 mode = 0;
400 char buf[32];
402 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
403 return -EFAULT;
405 if (!strncmp(buf, "host", 4))
406 mode |= DWC3_GCTL_PRTCAP_HOST;
408 if (!strncmp(buf, "device", 6))
409 mode |= DWC3_GCTL_PRTCAP_DEVICE;
411 if (!strncmp(buf, "otg", 3))
412 mode |= DWC3_GCTL_PRTCAP_OTG;
414 if (mode) {
415 spin_lock_irqsave(&dwc->lock, flags);
416 if (mode & DWC3_GCTL_PRTCAP_HOST) {
417 dwc3_omap_usbvbus_id_handler(dwc->dev->parent,
418 OMAP_DWC3_ID_GROUND);
419 mode = 0;
420 } else if (mode & DWC3_GCTL_PRTCAP_DEVICE) {
421 dwc3_omap_usbvbus_id_handler(dwc->dev->parent,
422 OMAP_DWC3_VBUS_VALID);
423 mode = 1;
424 }
425 spin_unlock_irqrestore(&dwc->lock, flags);
426 }
427 return count;
428 }
430 static const struct file_operations dwc3_mode_fops = {
431 .open = dwc3_mode_open,
432 .write = dwc3_mode_write,
433 .read = seq_read,
434 .llseek = seq_lseek,
435 .release = single_release,
436 };
438 static int dwc3_testmode_show(struct seq_file *s, void *unused)
439 {
440 struct dwc3 *dwc = s->private;
441 unsigned long flags;
442 u32 reg;
444 spin_lock_irqsave(&dwc->lock, flags);
445 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
446 reg &= DWC3_DCTL_TSTCTRL_MASK;
447 reg >>= 1;
448 spin_unlock_irqrestore(&dwc->lock, flags);
450 switch (reg) {
451 case 0:
452 seq_printf(s, "no test\n");
453 break;
454 case TEST_J:
455 seq_printf(s, "test_j\n");
456 break;
457 case TEST_K:
458 seq_printf(s, "test_k\n");
459 break;
460 case TEST_SE0_NAK:
461 seq_printf(s, "test_se0_nak\n");
462 break;
463 case TEST_PACKET:
464 seq_printf(s, "test_packet\n");
465 break;
466 case TEST_FORCE_EN:
467 seq_printf(s, "test_force_enable\n");
468 break;
469 default:
470 seq_printf(s, "UNKNOWN %d\n", reg);
471 }
473 return 0;
474 }
476 static int dwc3_testmode_open(struct inode *inode, struct file *file)
477 {
478 return single_open(file, dwc3_testmode_show, inode->i_private);
479 }
481 static ssize_t dwc3_testmode_write(struct file *file,
482 const char __user *ubuf, size_t count, loff_t *ppos)
483 {
484 struct seq_file *s = file->private_data;
485 struct dwc3 *dwc = s->private;
486 unsigned long flags;
487 u32 testmode = 0;
488 char buf[32];
490 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
491 return -EFAULT;
493 if (!strncmp(buf, "test_j", 6))
494 testmode = TEST_J;
495 else if (!strncmp(buf, "test_k", 6))
496 testmode = TEST_K;
497 else if (!strncmp(buf, "test_se0_nak", 12))
498 testmode = TEST_SE0_NAK;
499 else if (!strncmp(buf, "test_packet", 11))
500 testmode = TEST_PACKET;
501 else if (!strncmp(buf, "test_force_enable", 17))
502 testmode = TEST_FORCE_EN;
503 else
504 testmode = 0;
506 spin_lock_irqsave(&dwc->lock, flags);
507 dwc3_gadget_set_test_mode(dwc, testmode);
508 spin_unlock_irqrestore(&dwc->lock, flags);
510 return count;
511 }
513 static const struct file_operations dwc3_testmode_fops = {
514 .open = dwc3_testmode_open,
515 .write = dwc3_testmode_write,
516 .read = seq_read,
517 .llseek = seq_lseek,
518 .release = single_release,
519 };
521 static int dwc3_link_state_show(struct seq_file *s, void *unused)
522 {
523 struct dwc3 *dwc = s->private;
524 unsigned long flags;
525 enum dwc3_link_state state;
526 u32 reg;
528 spin_lock_irqsave(&dwc->lock, flags);
529 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
530 state = DWC3_DSTS_USBLNKST(reg);
531 spin_unlock_irqrestore(&dwc->lock, flags);
533 switch (state) {
534 case DWC3_LINK_STATE_U0:
535 seq_printf(s, "U0\n");
536 break;
537 case DWC3_LINK_STATE_U1:
538 seq_printf(s, "U1\n");
539 break;
540 case DWC3_LINK_STATE_U2:
541 seq_printf(s, "U2\n");
542 break;
543 case DWC3_LINK_STATE_U3:
544 seq_printf(s, "U3\n");
545 break;
546 case DWC3_LINK_STATE_SS_DIS:
547 seq_printf(s, "SS.Disabled\n");
548 break;
549 case DWC3_LINK_STATE_RX_DET:
550 seq_printf(s, "Rx.Detect\n");
551 break;
552 case DWC3_LINK_STATE_SS_INACT:
553 seq_printf(s, "SS.Inactive\n");
554 break;
555 case DWC3_LINK_STATE_POLL:
556 seq_printf(s, "Poll\n");
557 break;
558 case DWC3_LINK_STATE_RECOV:
559 seq_printf(s, "Recovery\n");
560 break;
561 case DWC3_LINK_STATE_HRESET:
562 seq_printf(s, "HRESET\n");
563 break;
564 case DWC3_LINK_STATE_CMPLY:
565 seq_printf(s, "Compliance\n");
566 break;
567 case DWC3_LINK_STATE_LPBK:
568 seq_printf(s, "Loopback\n");
569 break;
570 case DWC3_LINK_STATE_RESET:
571 seq_printf(s, "Reset\n");
572 break;
573 case DWC3_LINK_STATE_RESUME:
574 seq_printf(s, "Resume\n");
575 break;
576 default:
577 seq_printf(s, "UNKNOWN %d\n", state);
578 }
580 return 0;
581 }
583 static int dwc3_link_state_open(struct inode *inode, struct file *file)
584 {
585 return single_open(file, dwc3_link_state_show, inode->i_private);
586 }
588 static ssize_t dwc3_link_state_write(struct file *file,
589 const char __user *ubuf, size_t count, loff_t *ppos)
590 {
591 struct seq_file *s = file->private_data;
592 struct dwc3 *dwc = s->private;
593 unsigned long flags;
594 enum dwc3_link_state state = 0;
595 char buf[32];
597 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
598 return -EFAULT;
600 if (!strncmp(buf, "SS.Disabled", 11))
601 state = DWC3_LINK_STATE_SS_DIS;
602 else if (!strncmp(buf, "Rx.Detect", 9))
603 state = DWC3_LINK_STATE_RX_DET;
604 else if (!strncmp(buf, "SS.Inactive", 11))
605 state = DWC3_LINK_STATE_SS_INACT;
606 else if (!strncmp(buf, "Recovery", 8))
607 state = DWC3_LINK_STATE_RECOV;
608 else if (!strncmp(buf, "Compliance", 10))
609 state = DWC3_LINK_STATE_CMPLY;
610 else if (!strncmp(buf, "Loopback", 8))
611 state = DWC3_LINK_STATE_LPBK;
612 else
613 return -EINVAL;
615 spin_lock_irqsave(&dwc->lock, flags);
616 dwc3_gadget_set_link_state(dwc, state);
617 spin_unlock_irqrestore(&dwc->lock, flags);
619 return count;
620 }
622 static const struct file_operations dwc3_link_state_fops = {
623 .open = dwc3_link_state_open,
624 .write = dwc3_link_state_write,
625 .read = seq_read,
626 .llseek = seq_lseek,
627 .release = single_release,
628 };
630 int dwc3_debugfs_init(struct dwc3 *dwc)
631 {
632 struct dentry *root;
633 struct dentry *file;
634 int ret;
636 root = debugfs_create_dir(dev_name(dwc->dev), NULL);
637 if (!root) {
638 ret = -ENOMEM;
639 goto err0;
640 }
642 dwc->root = root;
644 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
645 if (!dwc->regset) {
646 ret = -ENOMEM;
647 goto err1;
648 }
650 dwc->regset->regs = dwc3_regs;
651 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
652 dwc->regset->base = dwc->regs;
654 file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
655 if (!file) {
656 ret = -ENOMEM;
657 goto err1;
658 }
660 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
661 file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
662 dwc, &dwc3_mode_fops);
663 if (!file) {
664 ret = -ENOMEM;
665 goto err1;
666 }
667 }
669 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
670 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
671 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
672 dwc, &dwc3_testmode_fops);
673 if (!file) {
674 ret = -ENOMEM;
675 goto err1;
676 }
678 file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
679 dwc, &dwc3_link_state_fops);
680 if (!file) {
681 ret = -ENOMEM;
682 goto err1;
683 }
684 }
686 return 0;
688 err1:
689 debugfs_remove_recursive(root);
691 err0:
692 return ret;
693 }
695 void dwc3_debugfs_exit(struct dwc3 *dwc)
696 {
697 debugfs_remove_recursive(dwc->root);
698 dwc->root = NULL;
699 }