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 - https://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 DWC3_LSP_MUX_UNSELECTED 0xfffff
29
30 #define dump_register(nm) \
31 { \
32 .name = __stringify(nm), \
33 .offset = DWC3_ ##nm, \
34 }
35
36 #define dump_ep_register_set(n) \
37 { \
38 .name = "DEPCMDPAR2("__stringify(n)")", \
39 .offset = DWC3_DEP_BASE(n) + \
40 DWC3_DEPCMDPAR2, \
41 }, \
42 { \
43 .name = "DEPCMDPAR1("__stringify(n)")", \
44 .offset = DWC3_DEP_BASE(n) + \
45 DWC3_DEPCMDPAR1, \
46 }, \
47 { \
48 .name = "DEPCMDPAR0("__stringify(n)")", \
49 .offset = DWC3_DEP_BASE(n) + \
50 DWC3_DEPCMDPAR0, \
51 }, \
52 { \
53 .name = "DEPCMD("__stringify(n)")", \
54 .offset = DWC3_DEP_BASE(n) + \
55 DWC3_DEPCMD, \
56 }
57
58
59 static const struct debugfs_reg32 dwc3_regs[] = {
60 dump_register(GSBUSCFG0),
61 dump_register(GSBUSCFG1),
62 dump_register(GTXTHRCFG),
63 dump_register(GRXTHRCFG),
64 dump_register(GCTL),
65 dump_register(GEVTEN),
66 dump_register(GSTS),
67 dump_register(GUCTL1),
68 dump_register(GSNPSID),
69 dump_register(GGPIO),
70 dump_register(GUID),
71 dump_register(GUCTL),
72 dump_register(GBUSERRADDR0),
73 dump_register(GBUSERRADDR1),
74 dump_register(GPRTBIMAP0),
75 dump_register(GPRTBIMAP1),
76 dump_register(GHWPARAMS0),
77 dump_register(GHWPARAMS1),
78 dump_register(GHWPARAMS2),
79 dump_register(GHWPARAMS3),
80 dump_register(GHWPARAMS4),
81 dump_register(GHWPARAMS5),
82 dump_register(GHWPARAMS6),
83 dump_register(GHWPARAMS7),
84 dump_register(GDBGFIFOSPACE),
85 dump_register(GDBGLTSSM),
86 dump_register(GDBGBMU),
87 dump_register(GPRTBIMAP_HS0),
88 dump_register(GPRTBIMAP_HS1),
89 dump_register(GPRTBIMAP_FS0),
90 dump_register(GPRTBIMAP_FS1),
91
92 dump_register(GUSB2PHYCFG(0)),
93 dump_register(GUSB2PHYCFG(1)),
94 dump_register(GUSB2PHYCFG(2)),
95 dump_register(GUSB2PHYCFG(3)),
96 dump_register(GUSB2PHYCFG(4)),
97 dump_register(GUSB2PHYCFG(5)),
98 dump_register(GUSB2PHYCFG(6)),
99 dump_register(GUSB2PHYCFG(7)),
100 dump_register(GUSB2PHYCFG(8)),
101 dump_register(GUSB2PHYCFG(9)),
102 dump_register(GUSB2PHYCFG(10)),
103 dump_register(GUSB2PHYCFG(11)),
104 dump_register(GUSB2PHYCFG(12)),
105 dump_register(GUSB2PHYCFG(13)),
106 dump_register(GUSB2PHYCFG(14)),
107 dump_register(GUSB2PHYCFG(15)),
108
109 dump_register(GUSB2I2CCTL(0)),
110 dump_register(GUSB2I2CCTL(1)),
111 dump_register(GUSB2I2CCTL(2)),
112 dump_register(GUSB2I2CCTL(3)),
113 dump_register(GUSB2I2CCTL(4)),
114 dump_register(GUSB2I2CCTL(5)),
115 dump_register(GUSB2I2CCTL(6)),
116 dump_register(GUSB2I2CCTL(7)),
117 dump_register(GUSB2I2CCTL(8)),
118 dump_register(GUSB2I2CCTL(9)),
119 dump_register(GUSB2I2CCTL(10)),
120 dump_register(GUSB2I2CCTL(11)),
121 dump_register(GUSB2I2CCTL(12)),
122 dump_register(GUSB2I2CCTL(13)),
123 dump_register(GUSB2I2CCTL(14)),
124 dump_register(GUSB2I2CCTL(15)),
125
126 dump_register(GUSB2PHYACC(0)),
127 dump_register(GUSB2PHYACC(1)),
128 dump_register(GUSB2PHYACC(2)),
129 dump_register(GUSB2PHYACC(3)),
130 dump_register(GUSB2PHYACC(4)),
131 dump_register(GUSB2PHYACC(5)),
132 dump_register(GUSB2PHYACC(6)),
133 dump_register(GUSB2PHYACC(7)),
134 dump_register(GUSB2PHYACC(8)),
135 dump_register(GUSB2PHYACC(9)),
136 dump_register(GUSB2PHYACC(10)),
137 dump_register(GUSB2PHYACC(11)),
138 dump_register(GUSB2PHYACC(12)),
139 dump_register(GUSB2PHYACC(13)),
140 dump_register(GUSB2PHYACC(14)),
141 dump_register(GUSB2PHYACC(15)),
142
143 dump_register(GUSB3PIPECTL(0)),
144 dump_register(GUSB3PIPECTL(1)),
145 dump_register(GUSB3PIPECTL(2)),
146 dump_register(GUSB3PIPECTL(3)),
147 dump_register(GUSB3PIPECTL(4)),
148 dump_register(GUSB3PIPECTL(5)),
149 dump_register(GUSB3PIPECTL(6)),
150 dump_register(GUSB3PIPECTL(7)),
151 dump_register(GUSB3PIPECTL(8)),
152 dump_register(GUSB3PIPECTL(9)),
153 dump_register(GUSB3PIPECTL(10)),
154 dump_register(GUSB3PIPECTL(11)),
155 dump_register(GUSB3PIPECTL(12)),
156 dump_register(GUSB3PIPECTL(13)),
157 dump_register(GUSB3PIPECTL(14)),
158 dump_register(GUSB3PIPECTL(15)),
159
160 dump_register(GTXFIFOSIZ(0)),
161 dump_register(GTXFIFOSIZ(1)),
162 dump_register(GTXFIFOSIZ(2)),
163 dump_register(GTXFIFOSIZ(3)),
164 dump_register(GTXFIFOSIZ(4)),
165 dump_register(GTXFIFOSIZ(5)),
166 dump_register(GTXFIFOSIZ(6)),
167 dump_register(GTXFIFOSIZ(7)),
168 dump_register(GTXFIFOSIZ(8)),
169 dump_register(GTXFIFOSIZ(9)),
170 dump_register(GTXFIFOSIZ(10)),
171 dump_register(GTXFIFOSIZ(11)),
172 dump_register(GTXFIFOSIZ(12)),
173 dump_register(GTXFIFOSIZ(13)),
174 dump_register(GTXFIFOSIZ(14)),
175 dump_register(GTXFIFOSIZ(15)),
176 dump_register(GTXFIFOSIZ(16)),
177 dump_register(GTXFIFOSIZ(17)),
178 dump_register(GTXFIFOSIZ(18)),
179 dump_register(GTXFIFOSIZ(19)),
180 dump_register(GTXFIFOSIZ(20)),
181 dump_register(GTXFIFOSIZ(21)),
182 dump_register(GTXFIFOSIZ(22)),
183 dump_register(GTXFIFOSIZ(23)),
184 dump_register(GTXFIFOSIZ(24)),
185 dump_register(GTXFIFOSIZ(25)),
186 dump_register(GTXFIFOSIZ(26)),
187 dump_register(GTXFIFOSIZ(27)),
188 dump_register(GTXFIFOSIZ(28)),
189 dump_register(GTXFIFOSIZ(29)),
190 dump_register(GTXFIFOSIZ(30)),
191 dump_register(GTXFIFOSIZ(31)),
192
193 dump_register(GRXFIFOSIZ(0)),
194 dump_register(GRXFIFOSIZ(1)),
195 dump_register(GRXFIFOSIZ(2)),
196 dump_register(GRXFIFOSIZ(3)),
197 dump_register(GRXFIFOSIZ(4)),
198 dump_register(GRXFIFOSIZ(5)),
199 dump_register(GRXFIFOSIZ(6)),
200 dump_register(GRXFIFOSIZ(7)),
201 dump_register(GRXFIFOSIZ(8)),
202 dump_register(GRXFIFOSIZ(9)),
203 dump_register(GRXFIFOSIZ(10)),
204 dump_register(GRXFIFOSIZ(11)),
205 dump_register(GRXFIFOSIZ(12)),
206 dump_register(GRXFIFOSIZ(13)),
207 dump_register(GRXFIFOSIZ(14)),
208 dump_register(GRXFIFOSIZ(15)),
209 dump_register(GRXFIFOSIZ(16)),
210 dump_register(GRXFIFOSIZ(17)),
211 dump_register(GRXFIFOSIZ(18)),
212 dump_register(GRXFIFOSIZ(19)),
213 dump_register(GRXFIFOSIZ(20)),
214 dump_register(GRXFIFOSIZ(21)),
215 dump_register(GRXFIFOSIZ(22)),
216 dump_register(GRXFIFOSIZ(23)),
217 dump_register(GRXFIFOSIZ(24)),
218 dump_register(GRXFIFOSIZ(25)),
219 dump_register(GRXFIFOSIZ(26)),
220 dump_register(GRXFIFOSIZ(27)),
221 dump_register(GRXFIFOSIZ(28)),
222 dump_register(GRXFIFOSIZ(29)),
223 dump_register(GRXFIFOSIZ(30)),
224 dump_register(GRXFIFOSIZ(31)),
225
226 dump_register(GEVNTADRLO(0)),
227 dump_register(GEVNTADRHI(0)),
228 dump_register(GEVNTSIZ(0)),
229 dump_register(GEVNTCOUNT(0)),
230
231 dump_register(GHWPARAMS8),
232 dump_register(DCFG),
233 dump_register(DCTL),
234 dump_register(DEVTEN),
235 dump_register(DSTS),
236 dump_register(DGCMDPAR),
237 dump_register(DGCMD),
238 dump_register(DALEPENA),
239
240 dump_ep_register_set(0),
241 dump_ep_register_set(1),
242 dump_ep_register_set(2),
243 dump_ep_register_set(3),
244 dump_ep_register_set(4),
245 dump_ep_register_set(5),
246 dump_ep_register_set(6),
247 dump_ep_register_set(7),
248 dump_ep_register_set(8),
249 dump_ep_register_set(9),
250 dump_ep_register_set(10),
251 dump_ep_register_set(11),
252 dump_ep_register_set(12),
253 dump_ep_register_set(13),
254 dump_ep_register_set(14),
255 dump_ep_register_set(15),
256 dump_ep_register_set(16),
257 dump_ep_register_set(17),
258 dump_ep_register_set(18),
259 dump_ep_register_set(19),
260 dump_ep_register_set(20),
261 dump_ep_register_set(21),
262 dump_ep_register_set(22),
263 dump_ep_register_set(23),
264 dump_ep_register_set(24),
265 dump_ep_register_set(25),
266 dump_ep_register_set(26),
267 dump_ep_register_set(27),
268 dump_ep_register_set(28),
269 dump_ep_register_set(29),
270 dump_ep_register_set(30),
271 dump_ep_register_set(31),
272
273 dump_register(OCFG),
274 dump_register(OCTL),
275 dump_register(OEVT),
276 dump_register(OEVTEN),
277 dump_register(OSTS),
278 };
279
dwc3_host_lsp(struct seq_file * s)280 static void dwc3_host_lsp(struct seq_file *s)
281 {
282 struct dwc3 *dwc = s->private;
283 bool dbc_enabled;
284 u32 sel;
285 u32 reg;
286 u32 val;
287
288 dbc_enabled = !!(dwc->hwparams.hwparams1 & DWC3_GHWPARAMS1_ENDBC);
289
290 sel = dwc->dbg_lsp_select;
291 if (sel == DWC3_LSP_MUX_UNSELECTED) {
292 seq_puts(s, "Write LSP selection to print for host\n");
293 return;
294 }
295
296 reg = DWC3_GDBGLSPMUX_HOSTSELECT(sel);
297
298 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
299 val = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
300 seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", sel, val);
301
302 if (dbc_enabled && sel < 256) {
303 reg |= DWC3_GDBGLSPMUX_ENDBC;
304 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
305 val = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
306 seq_printf(s, "GDBGLSP_DBC[%d] = 0x%08x\n", sel, val);
307 }
308 }
309
dwc3_gadget_lsp(struct seq_file * s)310 static void dwc3_gadget_lsp(struct seq_file *s)
311 {
312 struct dwc3 *dwc = s->private;
313 int i;
314 u32 reg;
315
316 for (i = 0; i < 16; i++) {
317 reg = DWC3_GDBGLSPMUX_DEVSELECT(i);
318 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
319 reg = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
320 seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", i, reg);
321 }
322 }
323
dwc3_lsp_show(struct seq_file * s,void * unused)324 static int dwc3_lsp_show(struct seq_file *s, void *unused)
325 {
326 struct dwc3 *dwc = s->private;
327 unsigned int current_mode;
328 unsigned long flags;
329 u32 reg;
330 int ret;
331
332 ret = pm_runtime_resume_and_get(dwc->dev);
333 if (ret < 0)
334 return ret;
335
336 spin_lock_irqsave(&dwc->lock, flags);
337 reg = dwc3_readl(dwc->regs, DWC3_GSTS);
338 current_mode = DWC3_GSTS_CURMOD(reg);
339
340 switch (current_mode) {
341 case DWC3_GSTS_CURMOD_HOST:
342 dwc3_host_lsp(s);
343 break;
344 case DWC3_GSTS_CURMOD_DEVICE:
345 dwc3_gadget_lsp(s);
346 break;
347 default:
348 seq_puts(s, "Mode is unknown, no LSP register printed\n");
349 break;
350 }
351 spin_unlock_irqrestore(&dwc->lock, flags);
352
353 pm_runtime_put_sync(dwc->dev);
354
355 return 0;
356 }
357
dwc3_lsp_open(struct inode * inode,struct file * file)358 static int dwc3_lsp_open(struct inode *inode, struct file *file)
359 {
360 return single_open(file, dwc3_lsp_show, inode->i_private);
361 }
362
dwc3_lsp_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)363 static ssize_t dwc3_lsp_write(struct file *file, const char __user *ubuf,
364 size_t count, loff_t *ppos)
365 {
366 struct seq_file *s = file->private_data;
367 struct dwc3 *dwc = s->private;
368 unsigned long flags;
369 char buf[32] = { 0 };
370 u32 sel;
371 int ret;
372
373 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
374 return -EFAULT;
375
376 ret = kstrtouint(buf, 0, &sel);
377 if (ret)
378 return ret;
379
380 spin_lock_irqsave(&dwc->lock, flags);
381 dwc->dbg_lsp_select = sel;
382 spin_unlock_irqrestore(&dwc->lock, flags);
383
384 return count;
385 }
386
387 static const struct file_operations dwc3_lsp_fops = {
388 .open = dwc3_lsp_open,
389 .write = dwc3_lsp_write,
390 .read = seq_read,
391 .llseek = seq_lseek,
392 .release = single_release,
393 };
394
dwc3_mode_show(struct seq_file * s,void * unused)395 static int dwc3_mode_show(struct seq_file *s, void *unused)
396 {
397 struct dwc3 *dwc = s->private;
398 unsigned long flags;
399 u32 reg;
400 int ret;
401
402 ret = pm_runtime_resume_and_get(dwc->dev);
403 if (ret < 0)
404 return ret;
405
406 spin_lock_irqsave(&dwc->lock, flags);
407 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
408 spin_unlock_irqrestore(&dwc->lock, flags);
409
410 switch (DWC3_GCTL_PRTCAP(reg)) {
411 case DWC3_GCTL_PRTCAP_HOST:
412 seq_puts(s, "host\n");
413 break;
414 case DWC3_GCTL_PRTCAP_DEVICE:
415 seq_puts(s, "device\n");
416 break;
417 case DWC3_GCTL_PRTCAP_OTG:
418 seq_puts(s, "otg\n");
419 break;
420 default:
421 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
422 }
423
424 pm_runtime_put_sync(dwc->dev);
425
426 return 0;
427 }
428
dwc3_mode_open(struct inode * inode,struct file * file)429 static int dwc3_mode_open(struct inode *inode, struct file *file)
430 {
431 return single_open(file, dwc3_mode_show, inode->i_private);
432 }
433
dwc3_mode_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)434 static ssize_t dwc3_mode_write(struct file *file,
435 const char __user *ubuf, size_t count, loff_t *ppos)
436 {
437 struct seq_file *s = file->private_data;
438 struct dwc3 *dwc = s->private;
439 u32 mode = 0;
440 char buf[32];
441
442 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
443 return -EFAULT;
444
445 if (dwc->dr_mode != USB_DR_MODE_OTG)
446 return count;
447
448 if (!strncmp(buf, "host", 4))
449 mode = DWC3_GCTL_PRTCAP_HOST;
450
451 if (!strncmp(buf, "device", 6))
452 mode = DWC3_GCTL_PRTCAP_DEVICE;
453
454 if (!strncmp(buf, "otg", 3))
455 mode = DWC3_GCTL_PRTCAP_OTG;
456
457 dwc3_set_mode(dwc, mode);
458
459 return count;
460 }
461
462 static const struct file_operations dwc3_mode_fops = {
463 .open = dwc3_mode_open,
464 .write = dwc3_mode_write,
465 .read = seq_read,
466 .llseek = seq_lseek,
467 .release = single_release,
468 };
469
dwc3_testmode_show(struct seq_file * s,void * unused)470 static int dwc3_testmode_show(struct seq_file *s, void *unused)
471 {
472 struct dwc3 *dwc = s->private;
473 unsigned long flags;
474 u32 reg;
475 int ret;
476
477 ret = pm_runtime_resume_and_get(dwc->dev);
478 if (ret < 0)
479 return ret;
480
481 spin_lock_irqsave(&dwc->lock, flags);
482 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
483 reg &= DWC3_DCTL_TSTCTRL_MASK;
484 reg >>= 1;
485 spin_unlock_irqrestore(&dwc->lock, flags);
486
487 switch (reg) {
488 case 0:
489 seq_puts(s, "no test\n");
490 break;
491 case USB_TEST_J:
492 seq_puts(s, "test_j\n");
493 break;
494 case USB_TEST_K:
495 seq_puts(s, "test_k\n");
496 break;
497 case USB_TEST_SE0_NAK:
498 seq_puts(s, "test_se0_nak\n");
499 break;
500 case USB_TEST_PACKET:
501 seq_puts(s, "test_packet\n");
502 break;
503 case USB_TEST_FORCE_ENABLE:
504 seq_puts(s, "test_force_enable\n");
505 break;
506 default:
507 seq_printf(s, "UNKNOWN %d\n", reg);
508 }
509
510 pm_runtime_put_sync(dwc->dev);
511
512 return 0;
513 }
514
dwc3_testmode_open(struct inode * inode,struct file * file)515 static int dwc3_testmode_open(struct inode *inode, struct file *file)
516 {
517 return single_open(file, dwc3_testmode_show, inode->i_private);
518 }
519
dwc3_testmode_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)520 static ssize_t dwc3_testmode_write(struct file *file,
521 const char __user *ubuf, size_t count, loff_t *ppos)
522 {
523 struct seq_file *s = file->private_data;
524 struct dwc3 *dwc = s->private;
525 unsigned long flags;
526 u32 testmode = 0;
527 char buf[32];
528 int ret;
529
530 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
531 return -EFAULT;
532
533 if (!strncmp(buf, "test_j", 6))
534 testmode = USB_TEST_J;
535 else if (!strncmp(buf, "test_k", 6))
536 testmode = USB_TEST_K;
537 else if (!strncmp(buf, "test_se0_nak", 12))
538 testmode = USB_TEST_SE0_NAK;
539 else if (!strncmp(buf, "test_packet", 11))
540 testmode = USB_TEST_PACKET;
541 else if (!strncmp(buf, "test_force_enable", 17))
542 testmode = USB_TEST_FORCE_ENABLE;
543 else
544 testmode = 0;
545
546 ret = pm_runtime_resume_and_get(dwc->dev);
547 if (ret < 0)
548 return ret;
549
550 spin_lock_irqsave(&dwc->lock, flags);
551 dwc3_gadget_set_test_mode(dwc, testmode);
552 spin_unlock_irqrestore(&dwc->lock, flags);
553
554 pm_runtime_put_sync(dwc->dev);
555
556 return count;
557 }
558
559 static const struct file_operations dwc3_testmode_fops = {
560 .open = dwc3_testmode_open,
561 .write = dwc3_testmode_write,
562 .read = seq_read,
563 .llseek = seq_lseek,
564 .release = single_release,
565 };
566
dwc3_link_state_show(struct seq_file * s,void * unused)567 static int dwc3_link_state_show(struct seq_file *s, void *unused)
568 {
569 struct dwc3 *dwc = s->private;
570 unsigned long flags;
571 enum dwc3_link_state state;
572 u32 reg;
573 u8 speed;
574 int ret;
575
576 ret = pm_runtime_resume_and_get(dwc->dev);
577 if (ret < 0)
578 return ret;
579
580 spin_lock_irqsave(&dwc->lock, flags);
581 reg = dwc3_readl(dwc->regs, DWC3_GSTS);
582 if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
583 seq_puts(s, "Not available\n");
584 spin_unlock_irqrestore(&dwc->lock, flags);
585 pm_runtime_put_sync(dwc->dev);
586 return 0;
587 }
588
589 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
590 state = DWC3_DSTS_USBLNKST(reg);
591 speed = reg & DWC3_DSTS_CONNECTSPD;
592
593 seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
594 dwc3_gadget_link_string(state) :
595 dwc3_gadget_hs_link_string(state));
596 spin_unlock_irqrestore(&dwc->lock, flags);
597
598 pm_runtime_put_sync(dwc->dev);
599
600 return 0;
601 }
602
dwc3_link_state_open(struct inode * inode,struct file * file)603 static int dwc3_link_state_open(struct inode *inode, struct file *file)
604 {
605 return single_open(file, dwc3_link_state_show, inode->i_private);
606 }
607
dwc3_link_state_write(struct file * file,const char __user * ubuf,size_t count,loff_t * ppos)608 static ssize_t dwc3_link_state_write(struct file *file,
609 const char __user *ubuf, size_t count, loff_t *ppos)
610 {
611 struct seq_file *s = file->private_data;
612 struct dwc3 *dwc = s->private;
613 unsigned long flags;
614 enum dwc3_link_state state = 0;
615 char buf[32];
616 u32 reg;
617 u8 speed;
618 int ret;
619
620 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
621 return -EFAULT;
622
623 if (!strncmp(buf, "SS.Disabled", 11))
624 state = DWC3_LINK_STATE_SS_DIS;
625 else if (!strncmp(buf, "Rx.Detect", 9))
626 state = DWC3_LINK_STATE_RX_DET;
627 else if (!strncmp(buf, "SS.Inactive", 11))
628 state = DWC3_LINK_STATE_SS_INACT;
629 else if (!strncmp(buf, "Recovery", 8))
630 state = DWC3_LINK_STATE_RECOV;
631 else if (!strncmp(buf, "Compliance", 10))
632 state = DWC3_LINK_STATE_CMPLY;
633 else if (!strncmp(buf, "Loopback", 8))
634 state = DWC3_LINK_STATE_LPBK;
635 else
636 return -EINVAL;
637
638 ret = pm_runtime_resume_and_get(dwc->dev);
639 if (ret < 0)
640 return ret;
641
642 spin_lock_irqsave(&dwc->lock, flags);
643 reg = dwc3_readl(dwc->regs, DWC3_GSTS);
644 if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
645 spin_unlock_irqrestore(&dwc->lock, flags);
646 pm_runtime_put_sync(dwc->dev);
647 return -EINVAL;
648 }
649
650 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
651 speed = reg & DWC3_DSTS_CONNECTSPD;
652
653 if (speed < DWC3_DSTS_SUPERSPEED &&
654 state != DWC3_LINK_STATE_RECOV) {
655 spin_unlock_irqrestore(&dwc->lock, flags);
656 pm_runtime_put_sync(dwc->dev);
657 return -EINVAL;
658 }
659
660 dwc3_gadget_set_link_state(dwc, state);
661 spin_unlock_irqrestore(&dwc->lock, flags);
662
663 pm_runtime_put_sync(dwc->dev);
664
665 return count;
666 }
667
668 static const struct file_operations dwc3_link_state_fops = {
669 .open = dwc3_link_state_open,
670 .write = dwc3_link_state_write,
671 .read = seq_read,
672 .llseek = seq_lseek,
673 .release = single_release,
674 };
675
676 struct dwc3_ep_file_map {
677 const char name[25];
678 const struct file_operations *const fops;
679 };
680
dwc3_tx_fifo_size_show(struct seq_file * s,void * unused)681 static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused)
682 {
683 struct dwc3_ep *dep = s->private;
684 struct dwc3 *dwc = dep->dwc;
685 unsigned long flags;
686 u32 mdwidth;
687 u32 val;
688 int ret;
689
690 ret = pm_runtime_resume_and_get(dwc->dev);
691 if (ret < 0)
692 return ret;
693
694 spin_lock_irqsave(&dwc->lock, flags);
695 val = dwc3_core_fifo_space(dep, DWC3_TXFIFO);
696
697 /* Convert to bytes */
698 mdwidth = dwc3_mdwidth(dwc);
699
700 val *= mdwidth;
701 val >>= 3;
702 seq_printf(s, "%u\n", val);
703 spin_unlock_irqrestore(&dwc->lock, flags);
704
705 pm_runtime_put_sync(dwc->dev);
706
707 return 0;
708 }
709
dwc3_rx_fifo_size_show(struct seq_file * s,void * unused)710 static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused)
711 {
712 struct dwc3_ep *dep = s->private;
713 struct dwc3 *dwc = dep->dwc;
714 unsigned long flags;
715 u32 mdwidth;
716 u32 val;
717 int ret;
718
719 ret = pm_runtime_resume_and_get(dwc->dev);
720 if (ret < 0)
721 return ret;
722
723 spin_lock_irqsave(&dwc->lock, flags);
724 val = dwc3_core_fifo_space(dep, DWC3_RXFIFO);
725
726 /* Convert to bytes */
727 mdwidth = dwc3_mdwidth(dwc);
728
729 val *= mdwidth;
730 val >>= 3;
731 seq_printf(s, "%u\n", val);
732 spin_unlock_irqrestore(&dwc->lock, flags);
733
734 pm_runtime_put_sync(dwc->dev);
735
736 return 0;
737 }
738
dwc3_tx_request_queue_show(struct seq_file * s,void * unused)739 static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
740 {
741 struct dwc3_ep *dep = s->private;
742 struct dwc3 *dwc = dep->dwc;
743 unsigned long flags;
744 u32 val;
745 int ret;
746
747 ret = pm_runtime_resume_and_get(dwc->dev);
748 if (ret < 0)
749 return ret;
750
751 spin_lock_irqsave(&dwc->lock, flags);
752 val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
753 seq_printf(s, "%u\n", val);
754 spin_unlock_irqrestore(&dwc->lock, flags);
755
756 pm_runtime_put_sync(dwc->dev);
757
758 return 0;
759 }
760
dwc3_rx_request_queue_show(struct seq_file * s,void * unused)761 static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
762 {
763 struct dwc3_ep *dep = s->private;
764 struct dwc3 *dwc = dep->dwc;
765 unsigned long flags;
766 u32 val;
767 int ret;
768
769 ret = pm_runtime_resume_and_get(dwc->dev);
770 if (ret < 0)
771 return ret;
772
773 spin_lock_irqsave(&dwc->lock, flags);
774 val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
775 seq_printf(s, "%u\n", val);
776 spin_unlock_irqrestore(&dwc->lock, flags);
777
778 pm_runtime_put_sync(dwc->dev);
779
780 return 0;
781 }
782
dwc3_rx_info_queue_show(struct seq_file * s,void * unused)783 static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
784 {
785 struct dwc3_ep *dep = s->private;
786 struct dwc3 *dwc = dep->dwc;
787 unsigned long flags;
788 u32 val;
789 int ret;
790
791 ret = pm_runtime_resume_and_get(dwc->dev);
792 if (ret < 0)
793 return ret;
794
795 spin_lock_irqsave(&dwc->lock, flags);
796 val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
797 seq_printf(s, "%u\n", val);
798 spin_unlock_irqrestore(&dwc->lock, flags);
799
800 pm_runtime_put_sync(dwc->dev);
801
802 return 0;
803 }
804
dwc3_descriptor_fetch_queue_show(struct seq_file * s,void * unused)805 static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
806 {
807 struct dwc3_ep *dep = s->private;
808 struct dwc3 *dwc = dep->dwc;
809 unsigned long flags;
810 u32 val;
811 int ret;
812
813 ret = pm_runtime_resume_and_get(dwc->dev);
814 if (ret < 0)
815 return ret;
816
817 spin_lock_irqsave(&dwc->lock, flags);
818 val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
819 seq_printf(s, "%u\n", val);
820 spin_unlock_irqrestore(&dwc->lock, flags);
821
822 pm_runtime_put_sync(dwc->dev);
823
824 return 0;
825 }
826
dwc3_event_queue_show(struct seq_file * s,void * unused)827 static int dwc3_event_queue_show(struct seq_file *s, void *unused)
828 {
829 struct dwc3_ep *dep = s->private;
830 struct dwc3 *dwc = dep->dwc;
831 unsigned long flags;
832 u32 val;
833 int ret;
834
835 ret = pm_runtime_resume_and_get(dwc->dev);
836 if (ret < 0)
837 return ret;
838
839 spin_lock_irqsave(&dwc->lock, flags);
840 val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
841 seq_printf(s, "%u\n", val);
842 spin_unlock_irqrestore(&dwc->lock, flags);
843
844 pm_runtime_put_sync(dwc->dev);
845
846 return 0;
847 }
848
dwc3_transfer_type_show(struct seq_file * s,void * unused)849 static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
850 {
851 struct dwc3_ep *dep = s->private;
852 struct dwc3 *dwc = dep->dwc;
853 unsigned long flags;
854
855 spin_lock_irqsave(&dwc->lock, flags);
856 if (!(dep->flags & DWC3_EP_ENABLED) || !dep->endpoint.desc) {
857 seq_puts(s, "--\n");
858 goto out;
859 }
860
861 switch (usb_endpoint_type(dep->endpoint.desc)) {
862 case USB_ENDPOINT_XFER_CONTROL:
863 seq_puts(s, "control\n");
864 break;
865 case USB_ENDPOINT_XFER_ISOC:
866 seq_puts(s, "isochronous\n");
867 break;
868 case USB_ENDPOINT_XFER_BULK:
869 seq_puts(s, "bulk\n");
870 break;
871 case USB_ENDPOINT_XFER_INT:
872 seq_puts(s, "interrupt\n");
873 break;
874 default:
875 seq_puts(s, "--\n");
876 }
877
878 out:
879 spin_unlock_irqrestore(&dwc->lock, flags);
880
881 return 0;
882 }
883
dwc3_trb_ring_show(struct seq_file * s,void * unused)884 static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
885 {
886 struct dwc3_ep *dep = s->private;
887 struct dwc3 *dwc = dep->dwc;
888 unsigned long flags;
889 int i;
890 int ret;
891
892 ret = pm_runtime_resume_and_get(dwc->dev);
893 if (ret < 0)
894 return ret;
895
896 spin_lock_irqsave(&dwc->lock, flags);
897 if (dep->number <= 1) {
898 seq_puts(s, "--\n");
899 goto out;
900 }
901
902 seq_puts(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
903
904 for (i = 0; i < DWC3_TRB_NUM; i++) {
905 struct dwc3_trb *trb = &dep->trb_pool[i];
906 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
907
908 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d %c%c\n",
909 trb->bph, trb->bpl, trb->size,
910 dwc3_trb_type_string(type),
911 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
912 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
913 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
914 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
915 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
916 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
917 dep->trb_enqueue == i ? 'E' : ' ',
918 dep->trb_dequeue == i ? 'D' : ' ');
919 }
920
921 out:
922 spin_unlock_irqrestore(&dwc->lock, flags);
923
924 pm_runtime_put_sync(dwc->dev);
925
926 return 0;
927 }
928
dwc3_ep_info_register_show(struct seq_file * s,void * unused)929 static int dwc3_ep_info_register_show(struct seq_file *s, void *unused)
930 {
931 struct dwc3_ep *dep = s->private;
932 struct dwc3 *dwc = dep->dwc;
933 unsigned long flags;
934 u64 ep_info;
935 u32 lower_32_bits;
936 u32 upper_32_bits;
937 u32 reg;
938 int ret;
939
940 ret = pm_runtime_resume_and_get(dwc->dev);
941 if (ret < 0)
942 return ret;
943
944 spin_lock_irqsave(&dwc->lock, flags);
945 reg = DWC3_GDBGLSPMUX_EPSELECT(dep->number);
946 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
947
948 lower_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO0);
949 upper_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO1);
950
951 ep_info = ((u64)upper_32_bits << 32) | lower_32_bits;
952 seq_printf(s, "0x%016llx\n", ep_info);
953 spin_unlock_irqrestore(&dwc->lock, flags);
954
955 pm_runtime_put_sync(dwc->dev);
956
957 return 0;
958 }
959
960 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_size);
961 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_size);
962 DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
963 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
964 DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
965 DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
966 DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
967 DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
968 DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
969 DEFINE_SHOW_ATTRIBUTE(dwc3_ep_info_register);
970
971 static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
972 { "tx_fifo_size", &dwc3_tx_fifo_size_fops, },
973 { "rx_fifo_size", &dwc3_rx_fifo_size_fops, },
974 { "tx_request_queue", &dwc3_tx_request_queue_fops, },
975 { "rx_request_queue", &dwc3_rx_request_queue_fops, },
976 { "rx_info_queue", &dwc3_rx_info_queue_fops, },
977 { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
978 { "event_queue", &dwc3_event_queue_fops, },
979 { "transfer_type", &dwc3_transfer_type_fops, },
980 { "trb_ring", &dwc3_trb_ring_fops, },
981 { "GDBGEPINFO", &dwc3_ep_info_register_fops, },
982 };
983
dwc3_debugfs_create_endpoint_dir(struct dwc3_ep * dep)984 void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
985 {
986 struct dentry *dir;
987 int i;
988
989 dir = debugfs_create_dir(dep->name, dep->dwc->debug_root);
990 for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
991 const struct file_operations *fops = dwc3_ep_file_map[i].fops;
992 const char *name = dwc3_ep_file_map[i].name;
993
994 debugfs_create_file(name, 0444, dir, dep, fops);
995 }
996 }
997
dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep * dep)998 void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep)
999 {
1000 debugfs_lookup_and_remove(dep->name, dep->dwc->debug_root);
1001 }
1002
dwc3_debugfs_init(struct dwc3 * dwc)1003 void dwc3_debugfs_init(struct dwc3 *dwc)
1004 {
1005 struct dentry *root;
1006
1007 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
1008 if (!dwc->regset)
1009 return;
1010
1011 dwc->dbg_lsp_select = DWC3_LSP_MUX_UNSELECTED;
1012
1013 dwc->regset->regs = dwc3_regs;
1014 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
1015 dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
1016 dwc->regset->dev = dwc->dev;
1017
1018 root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root);
1019 dwc->debug_root = root;
1020 debugfs_create_regset32("regdump", 0444, root, dwc->regset);
1021 debugfs_create_file("lsp_dump", 0644, root, dwc, &dwc3_lsp_fops);
1022
1023 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE))
1024 debugfs_create_file("mode", 0644, root, dwc,
1025 &dwc3_mode_fops);
1026
1027 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
1028 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
1029 debugfs_create_file("testmode", 0644, root, dwc,
1030 &dwc3_testmode_fops);
1031 debugfs_create_file("link_state", 0644, root, dwc,
1032 &dwc3_link_state_fops);
1033 }
1034 }
1035
dwc3_debugfs_exit(struct dwc3 * dwc)1036 void dwc3_debugfs_exit(struct dwc3 *dwc)
1037 {
1038 debugfs_lookup_and_remove(dev_name(dwc->dev), usb_debug_root);
1039 kfree(dwc->regset);
1040 }
1041