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usb: dwc3: gadget: Remove invalid low-speed setting
[linux-block.git] / drivers / usb / dwc3 / debugfs.c
CommitLineData
5fd54ace 1// SPDX-License-Identifier: GPL-2.0
72246da4
FB		 2/**
3 * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
4 *
10623b87 5 * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
72246da4
FB		 6 *
7 * Authors: Felipe Balbi <balbi@ti.com>,
8 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
72246da4
FB		 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>
25b8ff68 19#include <linux/uaccess.h>
72246da4 20
080d921f
FB		 21#include <linux/usb/ch9.h>
22
72246da4
FB		 23#include "core.h"
24#include "gadget.h"
25#include "io.h"
8becf270 26#include "debug.h"
72246da4 27
62ba09d6
TN		 28#define DWC3_LSP_MUX_UNSELECTED 0xfffff
29
72246da4
FB		 30#define dump_register(nm) \
31{ \
32 .name = __stringify(nm), \
2eb88016 33 .offset = DWC3_ ##nm, \
72246da4
FB		 34}
35
2eb88016
FB		 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
4ec0ddb1 59static const struct debugfs_reg32 dwc3_regs[] = {
72246da4
FB		 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),
475c8beb 67 dump_register(GUCTL1),
72246da4
FB		 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),
80b77634 86 dump_register(GDBGBMU),
72246da4
FB		 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
2eb88016
FB		 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),
72246da4
FB		 272
273 dump_register(OCFG),
274 dump_register(OCTL),
d4436c3a 275 dump_register(OEVT),
72246da4
FB		 276 dump_register(OEVTEN),
277 dump_register(OSTS),
278};
279
62ba09d6
TN		 280static 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
310static 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
324static 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
331 spin_lock_irqsave(&dwc->lock, flags);
332 reg = dwc3_readl(dwc->regs, DWC3_GSTS);
333 current_mode = DWC3_GSTS_CURMOD(reg);
334
335 switch (current_mode) {
336 case DWC3_GSTS_CURMOD_HOST:
337 dwc3_host_lsp(s);
338 break;
339 case DWC3_GSTS_CURMOD_DEVICE:
340 dwc3_gadget_lsp(s);
341 break;
342 default:
343 seq_puts(s, "Mode is unknown, no LSP register printed\n");
344 break;
345 }
346 spin_unlock_irqrestore(&dwc->lock, flags);
347
348 return 0;
349}
350
351static int dwc3_lsp_open(struct inode *inode, struct file *file)
352{
353 return single_open(file, dwc3_lsp_show, inode->i_private);
354}
355
356static ssize_t dwc3_lsp_write(struct file *file, const char __user *ubuf,
357 size_t count, loff_t *ppos)
358{
359 struct seq_file *s = file->private_data;
360 struct dwc3 *dwc = s->private;
361 unsigned long flags;
362 char buf[32] = { 0 };
363 u32 sel;
364 int ret;
365
366 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
367 return -EFAULT;
368
369 ret = kstrtouint(buf, 0, &sel);
370 if (ret)
371 return ret;
372
373 spin_lock_irqsave(&dwc->lock, flags);
374 dwc->dbg_lsp_select = sel;
375 spin_unlock_irqrestore(&dwc->lock, flags);
376
377 return count;
378}
379
380static const struct file_operations dwc3_lsp_fops = {
381 .open = dwc3_lsp_open,
382 .write = dwc3_lsp_write,
383 .read = seq_read,
384 .llseek = seq_lseek,
385 .release = single_release,
386};
387
0b9fe32d
FB		 388static int dwc3_mode_show(struct seq_file *s, void *unused)
389{
390 struct dwc3 *dwc = s->private;
391 unsigned long flags;
392 u32 reg;
393
394 spin_lock_irqsave(&dwc->lock, flags);
395 reg = dwc3_readl(dwc->regs, DWC3_GCTL);
396 spin_unlock_irqrestore(&dwc->lock, flags);
397
398 switch (DWC3_GCTL_PRTCAP(reg)) {
399 case DWC3_GCTL_PRTCAP_HOST:
9ae0eb45 400 seq_puts(s, "host\n");
0b9fe32d
FB		 401 break;
402 case DWC3_GCTL_PRTCAP_DEVICE:
9ae0eb45 403 seq_puts(s, "device\n");
0b9fe32d
FB		 404 break;
405 case DWC3_GCTL_PRTCAP_OTG:
9ae0eb45 406 seq_puts(s, "otg\n");
0b9fe32d
FB		 407 break;
408 default:
409 seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
410 }
411
412 return 0;
413}
414
415static int dwc3_mode_open(struct inode *inode, struct file *file)
416{
417 return single_open(file, dwc3_mode_show, inode->i_private);
418}
419
420static ssize_t dwc3_mode_write(struct file *file,
421 const char __user *ubuf, size_t count, loff_t *ppos)
422{
423 struct seq_file *s = file->private_data;
424 struct dwc3 *dwc = s->private;
3140e8cb 425 u32 mode = 0;
0b9fe32d
FB		 426 char buf[32];
427
428 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
429 return -EFAULT;
430
5bde3f02
LJ		 431 if (dwc->dr_mode != USB_DR_MODE_OTG)
432 return count;
433
0b9fe32d 434 if (!strncmp(buf, "host", 4))
b202c42c 435 mode = DWC3_GCTL_PRTCAP_HOST;
0b9fe32d
FB		 436
437 if (!strncmp(buf, "device", 6))
b202c42c 438 mode = DWC3_GCTL_PRTCAP_DEVICE;
0b9fe32d
FB		 439
440 if (!strncmp(buf, "otg", 3))
b202c42c 441 mode = DWC3_GCTL_PRTCAP_OTG;
0b9fe32d 442
41ce1456
RQ		 443 dwc3_set_mode(dwc, mode);
444
0b9fe32d
FB		 445 return count;
446}
447
448static const struct file_operations dwc3_mode_fops = {
449 .open = dwc3_mode_open,
450 .write = dwc3_mode_write,
451 .read = seq_read,
452 .llseek = seq_lseek,
453 .release = single_release,
454};
455
080d921f
FB		 456static int dwc3_testmode_show(struct seq_file *s, void *unused)
457{
458 struct dwc3 *dwc = s->private;
459 unsigned long flags;
460 u32 reg;
461
462 spin_lock_irqsave(&dwc->lock, flags);
463 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
464 reg &= DWC3_DCTL_TSTCTRL_MASK;
465 reg >>= 1;
466 spin_unlock_irqrestore(&dwc->lock, flags);
467
468 switch (reg) {
469 case 0:
9ae0eb45 470 seq_puts(s, "no test\n");
080d921f 471 break;
62fb45d3 472 case USB_TEST_J:
9ae0eb45 473 seq_puts(s, "test_j\n");
080d921f 474 break;
62fb45d3 475 case USB_TEST_K:
9ae0eb45 476 seq_puts(s, "test_k\n");
080d921f 477 break;
62fb45d3 478 case USB_TEST_SE0_NAK:
9ae0eb45 479 seq_puts(s, "test_se0_nak\n");
080d921f 480 break;
62fb45d3 481 case USB_TEST_PACKET:
9ae0eb45 482 seq_puts(s, "test_packet\n");
080d921f 483 break;
62fb45d3 484 case USB_TEST_FORCE_ENABLE:
9ae0eb45 485 seq_puts(s, "test_force_enable\n");
080d921f
FB		 486 break;
487 default:
488 seq_printf(s, "UNKNOWN %d\n", reg);
489 }
490
491 return 0;
492}
493
494static int dwc3_testmode_open(struct inode *inode, struct file *file)
495{
496 return single_open(file, dwc3_testmode_show, inode->i_private);
497}
498
499static ssize_t dwc3_testmode_write(struct file *file,
500 const char __user *ubuf, size_t count, loff_t *ppos)
501{
502 struct seq_file *s = file->private_data;
503 struct dwc3 *dwc = s->private;
504 unsigned long flags;
505 u32 testmode = 0;
506 char buf[32];
507
508 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
509 return -EFAULT;
510
511 if (!strncmp(buf, "test_j", 6))
62fb45d3 512 testmode = USB_TEST_J;
080d921f 513 else if (!strncmp(buf, "test_k", 6))
62fb45d3 514 testmode = USB_TEST_K;
09072543 515 else if (!strncmp(buf, "test_se0_nak", 12))
62fb45d3 516 testmode = USB_TEST_SE0_NAK;
09072543 517 else if (!strncmp(buf, "test_packet", 11))
62fb45d3 518 testmode = USB_TEST_PACKET;
09072543 519 else if (!strncmp(buf, "test_force_enable", 17))
62fb45d3 520 testmode = USB_TEST_FORCE_ENABLE;
080d921f
FB		 521 else
522 testmode = 0;
523
524 spin_lock_irqsave(&dwc->lock, flags);
525 dwc3_gadget_set_test_mode(dwc, testmode);
526 spin_unlock_irqrestore(&dwc->lock, flags);
527
528 return count;
529}
530
531static const struct file_operations dwc3_testmode_fops = {
532 .open = dwc3_testmode_open,
533 .write = dwc3_testmode_write,
534 .read = seq_read,
535 .llseek = seq_lseek,
536 .release = single_release,
537};
538
138801aa
FB		 539static int dwc3_link_state_show(struct seq_file *s, void *unused)
540{
541 struct dwc3 *dwc = s->private;
542 unsigned long flags;
543 enum dwc3_link_state state;
544 u32 reg;
0d36dede 545 u8 speed;
138801aa
FB		 546
547 spin_lock_irqsave(&dwc->lock, flags);
d102444c
TN		 548 reg = dwc3_readl(dwc->regs, DWC3_GSTS);
549 if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
550 seq_puts(s, "Not available\n");
551 spin_unlock_irqrestore(&dwc->lock, flags);
552 return 0;
553 }
554
138801aa
FB		 555 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
556 state = DWC3_DSTS_USBLNKST(reg);
0d36dede 557 speed = reg & DWC3_DSTS_CONNECTSPD;
138801aa 558
0d36dede
TN		 559 seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
560 dwc3_gadget_link_string(state) :
561 dwc3_gadget_hs_link_string(state));
562 spin_unlock_irqrestore(&dwc->lock, flags);
138801aa
FB		 563
564 return 0;
565}
566
567static int dwc3_link_state_open(struct inode *inode, struct file *file)
568{
569 return single_open(file, dwc3_link_state_show, inode->i_private);
570}
571
572static ssize_t dwc3_link_state_write(struct file *file,
573 const char __user *ubuf, size_t count, loff_t *ppos)
574{
575 struct seq_file *s = file->private_data;
576 struct dwc3 *dwc = s->private;
577 unsigned long flags;
578 enum dwc3_link_state state = 0;
579 char buf[32];
0d36dede
TN		 580 u32 reg;
581 u8 speed;
138801aa
FB		 582
583 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
584 return -EFAULT;
585
586 if (!strncmp(buf, "SS.Disabled", 11))
587 state = DWC3_LINK_STATE_SS_DIS;
588 else if (!strncmp(buf, "Rx.Detect", 9))
589 state = DWC3_LINK_STATE_RX_DET;
590 else if (!strncmp(buf, "SS.Inactive", 11))
591 state = DWC3_LINK_STATE_SS_INACT;
592 else if (!strncmp(buf, "Recovery", 8))
593 state = DWC3_LINK_STATE_RECOV;
594 else if (!strncmp(buf, "Compliance", 10))
595 state = DWC3_LINK_STATE_CMPLY;
596 else if (!strncmp(buf, "Loopback", 8))
597 state = DWC3_LINK_STATE_LPBK;
598 else
599 return -EINVAL;
600
601 spin_lock_irqsave(&dwc->lock, flags);
d102444c
TN		 602 reg = dwc3_readl(dwc->regs, DWC3_GSTS);
603 if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
604 spin_unlock_irqrestore(&dwc->lock, flags);
605 return -EINVAL;
606 }
607
0d36dede
TN		 608 reg = dwc3_readl(dwc->regs, DWC3_DSTS);
609 speed = reg & DWC3_DSTS_CONNECTSPD;
610
611 if (speed < DWC3_DSTS_SUPERSPEED &&
612 state != DWC3_LINK_STATE_RECOV) {
613 spin_unlock_irqrestore(&dwc->lock, flags);
614 return -EINVAL;
615 }
616
138801aa
FB		 617 dwc3_gadget_set_link_state(dwc, state);
618 spin_unlock_irqrestore(&dwc->lock, flags);
619
620 return count;
621}
622
623static const struct file_operations dwc3_link_state_fops = {
624 .open = dwc3_link_state_open,
625 .write = dwc3_link_state_write,
626 .read = seq_read,
627 .llseek = seq_lseek,
628 .release = single_release,
629};
630
818ec3ab 631struct dwc3_ep_file_map {
6d5b53c1
FB		 632 const char name[25];
633 const struct file_operations *const fops;
818ec3ab
FB		 634};
635
2c85a181 636static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused)
818ec3ab
FB		 637{
638 struct dwc3_ep *dep = s->private;
639 struct dwc3 *dwc = dep->dwc;
640 unsigned long flags;
4244ba02 641 int mdwidth;
818ec3ab
FB		 642 u32 val;
643
644 spin_lock_irqsave(&dwc->lock, flags);
2c85a181 645 val = dwc3_core_fifo_space(dep, DWC3_TXFIFO);
0f874f79
TN		 646
647 /* Convert to bytes */
4244ba02
TN		 648 mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
649 if (DWC3_IP_IS(DWC32))
650 mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
651
652 val *= mdwidth;
0f874f79 653 val >>= 3;
818ec3ab
FB		 654 seq_printf(s, "%u\n", val);
655 spin_unlock_irqrestore(&dwc->lock, flags);
656
657 return 0;
658}
659
2c85a181 660static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused)
818ec3ab
FB		 661{
662 struct dwc3_ep *dep = s->private;
663 struct dwc3 *dwc = dep->dwc;
664 unsigned long flags;
4244ba02 665 int mdwidth;
818ec3ab
FB		 666 u32 val;
667
668 spin_lock_irqsave(&dwc->lock, flags);
2c85a181 669 val = dwc3_core_fifo_space(dep, DWC3_RXFIFO);
0f874f79
TN		 670
671 /* Convert to bytes */
4244ba02
TN		 672 mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
673 if (DWC3_IP_IS(DWC32))
674 mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
675
676 val *= mdwidth;
0f874f79 677 val >>= 3;
818ec3ab
FB		 678 seq_printf(s, "%u\n", val);
679 spin_unlock_irqrestore(&dwc->lock, flags);
680
681 return 0;
682}
683
684static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
685{
686 struct dwc3_ep *dep = s->private;
687 struct dwc3 *dwc = dep->dwc;
688 unsigned long flags;
689 u32 val;
690
691 spin_lock_irqsave(&dwc->lock, flags);
692 val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
693 seq_printf(s, "%u\n", val);
694 spin_unlock_irqrestore(&dwc->lock, flags);
695
696 return 0;
697}
698
699static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
700{
701 struct dwc3_ep *dep = s->private;
702 struct dwc3 *dwc = dep->dwc;
703 unsigned long flags;
704 u32 val;
705
706 spin_lock_irqsave(&dwc->lock, flags);
707 val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
708 seq_printf(s, "%u\n", val);
709 spin_unlock_irqrestore(&dwc->lock, flags);
710
711 return 0;
712}
713
714static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
715{
716 struct dwc3_ep *dep = s->private;
717 struct dwc3 *dwc = dep->dwc;
718 unsigned long flags;
719 u32 val;
720
721 spin_lock_irqsave(&dwc->lock, flags);
722 val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
723 seq_printf(s, "%u\n", val);
724 spin_unlock_irqrestore(&dwc->lock, flags);
725
726 return 0;
727}
728
729static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
730{
731 struct dwc3_ep *dep = s->private;
732 struct dwc3 *dwc = dep->dwc;
733 unsigned long flags;
734 u32 val;
735
736 spin_lock_irqsave(&dwc->lock, flags);
737 val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
738 seq_printf(s, "%u\n", val);
739 spin_unlock_irqrestore(&dwc->lock, flags);
740
741 return 0;
742}
743
744static int dwc3_event_queue_show(struct seq_file *s, void *unused)
745{
746 struct dwc3_ep *dep = s->private;
747 struct dwc3 *dwc = dep->dwc;
748 unsigned long flags;
749 u32 val;
750
751 spin_lock_irqsave(&dwc->lock, flags);
752 val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
753 seq_printf(s, "%u\n", val);
754 spin_unlock_irqrestore(&dwc->lock, flags);
755
756 return 0;
757}
758
6d5b53c1 759static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
818ec3ab
FB		 760{
761 struct dwc3_ep *dep = s->private;
762 struct dwc3 *dwc = dep->dwc;
763 unsigned long flags;
764
765 spin_lock_irqsave(&dwc->lock, flags);
9ae0eb45
FB		 766 if (!(dep->flags & DWC3_EP_ENABLED) || !dep->endpoint.desc) {
767 seq_puts(s, "--\n");
818ec3ab
FB		 768 goto out;
769 }
770
771 switch (usb_endpoint_type(dep->endpoint.desc)) {
772 case USB_ENDPOINT_XFER_CONTROL:
9ae0eb45 773 seq_puts(s, "control\n");
818ec3ab
FB		 774 break;
775 case USB_ENDPOINT_XFER_ISOC:
9ae0eb45 776 seq_puts(s, "isochronous\n");
818ec3ab
FB		 777 break;
778 case USB_ENDPOINT_XFER_BULK:
9ae0eb45 779 seq_puts(s, "bulk\n");
818ec3ab
FB		 780 break;
781 case USB_ENDPOINT_XFER_INT:
9ae0eb45 782 seq_puts(s, "interrupt\n");
818ec3ab
FB		 783 break;
784 default:
9ae0eb45 785 seq_puts(s, "--\n");
818ec3ab
FB		 786 }
787
788out:
789 spin_unlock_irqrestore(&dwc->lock, flags);
790
791 return 0;
792}
793
6d5b53c1 794static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
818ec3ab
FB		 795{
796 struct dwc3_ep *dep = s->private;
797 struct dwc3 *dwc = dep->dwc;
798 unsigned long flags;
799 int i;
800
801 spin_lock_irqsave(&dwc->lock, flags);
802 if (dep->number <= 1) {
9ae0eb45 803 seq_puts(s, "--\n");
818ec3ab
FB		 804 goto out;
805 }
806
9ae0eb45 807 seq_puts(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
818ec3ab
FB		 808
809 for (i = 0; i < DWC3_TRB_NUM; i++) {
810 struct dwc3_trb *trb = &dep->trb_pool[i];
b5c7ed5c 811 unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
818ec3ab 812
436841d5 813 seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d %c%c\n",
818ec3ab 814 trb->bph, trb->bpl, trb->size,
b5c7ed5c 815 dwc3_trb_type_string(type),
818ec3ab
FB		 816 !!(trb->ctrl & DWC3_TRB_CTRL_IOC),
817 !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
818 !!(trb->ctrl & DWC3_TRB_CTRL_CSP),
819 !!(trb->ctrl & DWC3_TRB_CTRL_CHN),
820 !!(trb->ctrl & DWC3_TRB_CTRL_LST),
436841d5
FB		 821 !!(trb->ctrl & DWC3_TRB_CTRL_HWO),
822 dep->trb_enqueue == i ? 'E' : ' ',
823 dep->trb_dequeue == i ? 'D' : ' ');
818ec3ab
FB		 824 }
825
826out:
827 spin_unlock_irqrestore(&dwc->lock, flags);
828
829 return 0;
830}
831
62ba09d6
TN		 832static int dwc3_ep_info_register_show(struct seq_file *s, void *unused)
833{
834 struct dwc3_ep *dep = s->private;
835 struct dwc3 *dwc = dep->dwc;
836 unsigned long flags;
837 u64 ep_info;
838 u32 lower_32_bits;
839 u32 upper_32_bits;
840 u32 reg;
841
842 spin_lock_irqsave(&dwc->lock, flags);
843 reg = DWC3_GDBGLSPMUX_EPSELECT(dep->number);
844 dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
845
846 lower_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO0);
847 upper_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO1);
848
849 ep_info = ((u64)upper_32_bits << 32) | lower_32_bits;
850 seq_printf(s, "0x%016llx\n", ep_info);
851 spin_unlock_irqrestore(&dwc->lock, flags);
852
853 return 0;
854}
855
2c85a181
TN		 856DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_size);
857DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_size);
6d5b53c1
FB		 858DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
859DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
860DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
861DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
862DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
863DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
864DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
62ba09d6 865DEFINE_SHOW_ATTRIBUTE(dwc3_ep_info_register);
6d5b53c1
FB		 866
867static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
2c85a181
TN		 868 { "tx_fifo_size", &dwc3_tx_fifo_size_fops, },
869 { "rx_fifo_size", &dwc3_rx_fifo_size_fops, },
6d5b53c1
FB		 870 { "tx_request_queue", &dwc3_tx_request_queue_fops, },
871 { "rx_request_queue", &dwc3_rx_request_queue_fops, },
872 { "rx_info_queue", &dwc3_rx_info_queue_fops, },
873 { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
874 { "event_queue", &dwc3_event_queue_fops, },
875 { "transfer_type", &dwc3_transfer_type_fops, },
876 { "trb_ring", &dwc3_trb_ring_fops, },
62ba09d6 877 { "GDBGEPINFO", &dwc3_ep_info_register_fops, },
818ec3ab
FB		 878};
879
818ec3ab
FB		 880static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep,
881 struct dentry *parent)
882{
883 int i;
884
6d5b53c1
FB		 885 for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
886 const struct file_operations *fops = dwc3_ep_file_map[i].fops;
887 const char *name = dwc3_ep_file_map[i].name;
888
9ae0eb45 889 debugfs_create_file(name, 0444, parent, dep, fops);
6d5b53c1 890 }
818ec3ab
FB		 891}
892
893static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep,
894 struct dentry *parent)
895{
896 struct dentry *dir;
897
898 dir = debugfs_create_dir(dep->name, parent);
818ec3ab
FB		 899 dwc3_debugfs_create_endpoint_files(dep, dir);
900}
901
902static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc,
903 struct dentry *parent)
904{
905 int i;
906
47d3946e
BD		 907 for (i = 0; i < dwc->num_eps; i++) {
908 struct dwc3_ep *dep = dwc->eps[i];
818ec3ab
FB		 909
910 if (!dep)
911 continue;
912
913 dwc3_debugfs_create_endpoint_dir(dep, parent);
72246da4 914 }
818ec3ab
FB		 915}
916
4e9f3118 917void dwc3_debugfs_init(struct dwc3 *dwc)
72246da4
FB		 918{
919 struct dentry *root;
72246da4 920
d7668024 921 dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
535c8dc5 922 if (!dwc->regset)
4e9f3118 923 return;
d7668024 924
62ba09d6
TN		 925 dwc->dbg_lsp_select = DWC3_LSP_MUX_UNSELECTED;
926
d7668024
FB		 927 dwc->regset->regs = dwc3_regs;
928 dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
2eb88016 929 dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
d7668024 930
dcf5a2c3 931 root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root);
535c8dc5
GKH		 932 dwc->root = root;
933
9ae0eb45
FB		 934 debugfs_create_regset32("regdump", 0444, root, dwc->regset);
935 debugfs_create_file("lsp_dump", 0644, root, dwc, &dwc3_lsp_fops);
0b9fe32d 936
9ae0eb45
FB		 937 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE))
938 debugfs_create_file("mode", 0644, root, dwc,
535c8dc5 939 &dwc3_mode_fops);
0b9fe32d 940
dbfff05d
FB		 941 if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
942 IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
9ae0eb45
FB		 943 debugfs_create_file("testmode", 0644, root, dwc,
944 &dwc3_testmode_fops);
945 debugfs_create_file("link_state", 0644, root, dwc,
535c8dc5 946 &dwc3_link_state_fops);
818ec3ab 947 dwc3_debugfs_create_endpoint_dirs(dwc, root);
4e9f3118 948 }
72246da4
FB		 949}
950
fb4e98ab 951void dwc3_debugfs_exit(struct dwc3 *dwc)
72246da4
FB		 952{
953 debugfs_remove_recursive(dwc->root);
e6bdf819 954 kfree(dwc->regset);
72246da4 955}
Linux 6.x block layer and io_uring tree(s)