debugfs.c 19 KB

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  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. * Redistribution and use in source and binary forms, with or without
  10. * modification, are permitted provided that the following conditions
  11. * are met:
  12. * 1. Redistributions of source code must retain the above copyright
  13. * notice, this list of conditions, and the following disclaimer,
  14. * without modification.
  15. * 2. Redistributions in binary form must reproduce the above copyright
  16. * notice, this list of conditions and the following disclaimer in the
  17. * documentation and/or other materials provided with the distribution.
  18. * 3. The names of the above-listed copyright holders may not be used
  19. * to endorse or promote products derived from this software without
  20. * specific prior written permission.
  21. *
  22. * ALTERNATIVELY, this software may be distributed under the terms of the
  23. * GNU General Public License ("GPL") version 2, as published by the Free
  24. * Software Foundation.
  25. *
  26. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  27. * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  28. * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  30. * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  31. * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  32. * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  33. * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  34. * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  35. * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36. * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37. */
  38. #include <linux/kernel.h>
  39. #include <linux/slab.h>
  40. #include <linux/ptrace.h>
  41. #include <linux/types.h>
  42. #include <linux/spinlock.h>
  43. #include <linux/debugfs.h>
  44. #include <linux/seq_file.h>
  45. #include <linux/delay.h>
  46. #include <linux/uaccess.h>
  47. #include <linux/usb/ch9.h>
  48. #include "core.h"
  49. #include "gadget.h"
  50. #include "io.h"
  51. #include "debug.h"
  52. #define dump_register(nm) \
  53. { \
  54. .name = __stringify(nm), \
  55. .offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \
  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(GSNPSID),
  66. dump_register(GGPIO),
  67. dump_register(GUID),
  68. dump_register(GUCTL),
  69. dump_register(GBUSERRADDR0),
  70. dump_register(GBUSERRADDR1),
  71. dump_register(GPRTBIMAP0),
  72. dump_register(GPRTBIMAP1),
  73. dump_register(GHWPARAMS0),
  74. dump_register(GHWPARAMS1),
  75. dump_register(GHWPARAMS2),
  76. dump_register(GHWPARAMS3),
  77. dump_register(GHWPARAMS4),
  78. dump_register(GHWPARAMS5),
  79. dump_register(GHWPARAMS6),
  80. dump_register(GHWPARAMS7),
  81. dump_register(GDBGFIFOSPACE),
  82. dump_register(GDBGLTSSM),
  83. dump_register(GPRTBIMAP_HS0),
  84. dump_register(GPRTBIMAP_HS1),
  85. dump_register(GPRTBIMAP_FS0),
  86. dump_register(GPRTBIMAP_FS1),
  87. dump_register(GUSB2PHYCFG(0)),
  88. dump_register(GUSB2PHYCFG(1)),
  89. dump_register(GUSB2PHYCFG(2)),
  90. dump_register(GUSB2PHYCFG(3)),
  91. dump_register(GUSB2PHYCFG(4)),
  92. dump_register(GUSB2PHYCFG(5)),
  93. dump_register(GUSB2PHYCFG(6)),
  94. dump_register(GUSB2PHYCFG(7)),
  95. dump_register(GUSB2PHYCFG(8)),
  96. dump_register(GUSB2PHYCFG(9)),
  97. dump_register(GUSB2PHYCFG(10)),
  98. dump_register(GUSB2PHYCFG(11)),
  99. dump_register(GUSB2PHYCFG(12)),
  100. dump_register(GUSB2PHYCFG(13)),
  101. dump_register(GUSB2PHYCFG(14)),
  102. dump_register(GUSB2PHYCFG(15)),
  103. dump_register(GUSB2I2CCTL(0)),
  104. dump_register(GUSB2I2CCTL(1)),
  105. dump_register(GUSB2I2CCTL(2)),
  106. dump_register(GUSB2I2CCTL(3)),
  107. dump_register(GUSB2I2CCTL(4)),
  108. dump_register(GUSB2I2CCTL(5)),
  109. dump_register(GUSB2I2CCTL(6)),
  110. dump_register(GUSB2I2CCTL(7)),
  111. dump_register(GUSB2I2CCTL(8)),
  112. dump_register(GUSB2I2CCTL(9)),
  113. dump_register(GUSB2I2CCTL(10)),
  114. dump_register(GUSB2I2CCTL(11)),
  115. dump_register(GUSB2I2CCTL(12)),
  116. dump_register(GUSB2I2CCTL(13)),
  117. dump_register(GUSB2I2CCTL(14)),
  118. dump_register(GUSB2I2CCTL(15)),
  119. dump_register(GUSB2PHYACC(0)),
  120. dump_register(GUSB2PHYACC(1)),
  121. dump_register(GUSB2PHYACC(2)),
  122. dump_register(GUSB2PHYACC(3)),
  123. dump_register(GUSB2PHYACC(4)),
  124. dump_register(GUSB2PHYACC(5)),
  125. dump_register(GUSB2PHYACC(6)),
  126. dump_register(GUSB2PHYACC(7)),
  127. dump_register(GUSB2PHYACC(8)),
  128. dump_register(GUSB2PHYACC(9)),
  129. dump_register(GUSB2PHYACC(10)),
  130. dump_register(GUSB2PHYACC(11)),
  131. dump_register(GUSB2PHYACC(12)),
  132. dump_register(GUSB2PHYACC(13)),
  133. dump_register(GUSB2PHYACC(14)),
  134. dump_register(GUSB2PHYACC(15)),
  135. dump_register(GUSB3PIPECTL(0)),
  136. dump_register(GUSB3PIPECTL(1)),
  137. dump_register(GUSB3PIPECTL(2)),
  138. dump_register(GUSB3PIPECTL(3)),
  139. dump_register(GUSB3PIPECTL(4)),
  140. dump_register(GUSB3PIPECTL(5)),
  141. dump_register(GUSB3PIPECTL(6)),
  142. dump_register(GUSB3PIPECTL(7)),
  143. dump_register(GUSB3PIPECTL(8)),
  144. dump_register(GUSB3PIPECTL(9)),
  145. dump_register(GUSB3PIPECTL(10)),
  146. dump_register(GUSB3PIPECTL(11)),
  147. dump_register(GUSB3PIPECTL(12)),
  148. dump_register(GUSB3PIPECTL(13)),
  149. dump_register(GUSB3PIPECTL(14)),
  150. dump_register(GUSB3PIPECTL(15)),
  151. dump_register(GTXFIFOSIZ(0)),
  152. dump_register(GTXFIFOSIZ(1)),
  153. dump_register(GTXFIFOSIZ(2)),
  154. dump_register(GTXFIFOSIZ(3)),
  155. dump_register(GTXFIFOSIZ(4)),
  156. dump_register(GTXFIFOSIZ(5)),
  157. dump_register(GTXFIFOSIZ(6)),
  158. dump_register(GTXFIFOSIZ(7)),
  159. dump_register(GTXFIFOSIZ(8)),
  160. dump_register(GTXFIFOSIZ(9)),
  161. dump_register(GTXFIFOSIZ(10)),
  162. dump_register(GTXFIFOSIZ(11)),
  163. dump_register(GTXFIFOSIZ(12)),
  164. dump_register(GTXFIFOSIZ(13)),
  165. dump_register(GTXFIFOSIZ(14)),
  166. dump_register(GTXFIFOSIZ(15)),
  167. dump_register(GTXFIFOSIZ(16)),
  168. dump_register(GTXFIFOSIZ(17)),
  169. dump_register(GTXFIFOSIZ(18)),
  170. dump_register(GTXFIFOSIZ(19)),
  171. dump_register(GTXFIFOSIZ(20)),
  172. dump_register(GTXFIFOSIZ(21)),
  173. dump_register(GTXFIFOSIZ(22)),
  174. dump_register(GTXFIFOSIZ(23)),
  175. dump_register(GTXFIFOSIZ(24)),
  176. dump_register(GTXFIFOSIZ(25)),
  177. dump_register(GTXFIFOSIZ(26)),
  178. dump_register(GTXFIFOSIZ(27)),
  179. dump_register(GTXFIFOSIZ(28)),
  180. dump_register(GTXFIFOSIZ(29)),
  181. dump_register(GTXFIFOSIZ(30)),
  182. dump_register(GTXFIFOSIZ(31)),
  183. dump_register(GRXFIFOSIZ(0)),
  184. dump_register(GRXFIFOSIZ(1)),
  185. dump_register(GRXFIFOSIZ(2)),
  186. dump_register(GRXFIFOSIZ(3)),
  187. dump_register(GRXFIFOSIZ(4)),
  188. dump_register(GRXFIFOSIZ(5)),
  189. dump_register(GRXFIFOSIZ(6)),
  190. dump_register(GRXFIFOSIZ(7)),
  191. dump_register(GRXFIFOSIZ(8)),
  192. dump_register(GRXFIFOSIZ(9)),
  193. dump_register(GRXFIFOSIZ(10)),
  194. dump_register(GRXFIFOSIZ(11)),
  195. dump_register(GRXFIFOSIZ(12)),
  196. dump_register(GRXFIFOSIZ(13)),
  197. dump_register(GRXFIFOSIZ(14)),
  198. dump_register(GRXFIFOSIZ(15)),
  199. dump_register(GRXFIFOSIZ(16)),
  200. dump_register(GRXFIFOSIZ(17)),
  201. dump_register(GRXFIFOSIZ(18)),
  202. dump_register(GRXFIFOSIZ(19)),
  203. dump_register(GRXFIFOSIZ(20)),
  204. dump_register(GRXFIFOSIZ(21)),
  205. dump_register(GRXFIFOSIZ(22)),
  206. dump_register(GRXFIFOSIZ(23)),
  207. dump_register(GRXFIFOSIZ(24)),
  208. dump_register(GRXFIFOSIZ(25)),
  209. dump_register(GRXFIFOSIZ(26)),
  210. dump_register(GRXFIFOSIZ(27)),
  211. dump_register(GRXFIFOSIZ(28)),
  212. dump_register(GRXFIFOSIZ(29)),
  213. dump_register(GRXFIFOSIZ(30)),
  214. dump_register(GRXFIFOSIZ(31)),
  215. dump_register(GEVNTADRLO(0)),
  216. dump_register(GEVNTADRHI(0)),
  217. dump_register(GEVNTSIZ(0)),
  218. dump_register(GEVNTCOUNT(0)),
  219. dump_register(GHWPARAMS8),
  220. dump_register(DCFG),
  221. dump_register(DCTL),
  222. dump_register(DEVTEN),
  223. dump_register(DSTS),
  224. dump_register(DGCMDPAR),
  225. dump_register(DGCMD),
  226. dump_register(DALEPENA),
  227. dump_register(DEPCMDPAR2(0)),
  228. dump_register(DEPCMDPAR2(1)),
  229. dump_register(DEPCMDPAR2(2)),
  230. dump_register(DEPCMDPAR2(3)),
  231. dump_register(DEPCMDPAR2(4)),
  232. dump_register(DEPCMDPAR2(5)),
  233. dump_register(DEPCMDPAR2(6)),
  234. dump_register(DEPCMDPAR2(7)),
  235. dump_register(DEPCMDPAR2(8)),
  236. dump_register(DEPCMDPAR2(9)),
  237. dump_register(DEPCMDPAR2(10)),
  238. dump_register(DEPCMDPAR2(11)),
  239. dump_register(DEPCMDPAR2(12)),
  240. dump_register(DEPCMDPAR2(13)),
  241. dump_register(DEPCMDPAR2(14)),
  242. dump_register(DEPCMDPAR2(15)),
  243. dump_register(DEPCMDPAR2(16)),
  244. dump_register(DEPCMDPAR2(17)),
  245. dump_register(DEPCMDPAR2(18)),
  246. dump_register(DEPCMDPAR2(19)),
  247. dump_register(DEPCMDPAR2(20)),
  248. dump_register(DEPCMDPAR2(21)),
  249. dump_register(DEPCMDPAR2(22)),
  250. dump_register(DEPCMDPAR2(23)),
  251. dump_register(DEPCMDPAR2(24)),
  252. dump_register(DEPCMDPAR2(25)),
  253. dump_register(DEPCMDPAR2(26)),
  254. dump_register(DEPCMDPAR2(27)),
  255. dump_register(DEPCMDPAR2(28)),
  256. dump_register(DEPCMDPAR2(29)),
  257. dump_register(DEPCMDPAR2(30)),
  258. dump_register(DEPCMDPAR2(31)),
  259. dump_register(DEPCMDPAR1(0)),
  260. dump_register(DEPCMDPAR1(1)),
  261. dump_register(DEPCMDPAR1(2)),
  262. dump_register(DEPCMDPAR1(3)),
  263. dump_register(DEPCMDPAR1(4)),
  264. dump_register(DEPCMDPAR1(5)),
  265. dump_register(DEPCMDPAR1(6)),
  266. dump_register(DEPCMDPAR1(7)),
  267. dump_register(DEPCMDPAR1(8)),
  268. dump_register(DEPCMDPAR1(9)),
  269. dump_register(DEPCMDPAR1(10)),
  270. dump_register(DEPCMDPAR1(11)),
  271. dump_register(DEPCMDPAR1(12)),
  272. dump_register(DEPCMDPAR1(13)),
  273. dump_register(DEPCMDPAR1(14)),
  274. dump_register(DEPCMDPAR1(15)),
  275. dump_register(DEPCMDPAR1(16)),
  276. dump_register(DEPCMDPAR1(17)),
  277. dump_register(DEPCMDPAR1(18)),
  278. dump_register(DEPCMDPAR1(19)),
  279. dump_register(DEPCMDPAR1(20)),
  280. dump_register(DEPCMDPAR1(21)),
  281. dump_register(DEPCMDPAR1(22)),
  282. dump_register(DEPCMDPAR1(23)),
  283. dump_register(DEPCMDPAR1(24)),
  284. dump_register(DEPCMDPAR1(25)),
  285. dump_register(DEPCMDPAR1(26)),
  286. dump_register(DEPCMDPAR1(27)),
  287. dump_register(DEPCMDPAR1(28)),
  288. dump_register(DEPCMDPAR1(29)),
  289. dump_register(DEPCMDPAR1(30)),
  290. dump_register(DEPCMDPAR1(31)),
  291. dump_register(DEPCMDPAR0(0)),
  292. dump_register(DEPCMDPAR0(1)),
  293. dump_register(DEPCMDPAR0(2)),
  294. dump_register(DEPCMDPAR0(3)),
  295. dump_register(DEPCMDPAR0(4)),
  296. dump_register(DEPCMDPAR0(5)),
  297. dump_register(DEPCMDPAR0(6)),
  298. dump_register(DEPCMDPAR0(7)),
  299. dump_register(DEPCMDPAR0(8)),
  300. dump_register(DEPCMDPAR0(9)),
  301. dump_register(DEPCMDPAR0(10)),
  302. dump_register(DEPCMDPAR0(11)),
  303. dump_register(DEPCMDPAR0(12)),
  304. dump_register(DEPCMDPAR0(13)),
  305. dump_register(DEPCMDPAR0(14)),
  306. dump_register(DEPCMDPAR0(15)),
  307. dump_register(DEPCMDPAR0(16)),
  308. dump_register(DEPCMDPAR0(17)),
  309. dump_register(DEPCMDPAR0(18)),
  310. dump_register(DEPCMDPAR0(19)),
  311. dump_register(DEPCMDPAR0(20)),
  312. dump_register(DEPCMDPAR0(21)),
  313. dump_register(DEPCMDPAR0(22)),
  314. dump_register(DEPCMDPAR0(23)),
  315. dump_register(DEPCMDPAR0(24)),
  316. dump_register(DEPCMDPAR0(25)),
  317. dump_register(DEPCMDPAR0(26)),
  318. dump_register(DEPCMDPAR0(27)),
  319. dump_register(DEPCMDPAR0(28)),
  320. dump_register(DEPCMDPAR0(29)),
  321. dump_register(DEPCMDPAR0(30)),
  322. dump_register(DEPCMDPAR0(31)),
  323. dump_register(DEPCMD(0)),
  324. dump_register(DEPCMD(1)),
  325. dump_register(DEPCMD(2)),
  326. dump_register(DEPCMD(3)),
  327. dump_register(DEPCMD(4)),
  328. dump_register(DEPCMD(5)),
  329. dump_register(DEPCMD(6)),
  330. dump_register(DEPCMD(7)),
  331. dump_register(DEPCMD(8)),
  332. dump_register(DEPCMD(9)),
  333. dump_register(DEPCMD(10)),
  334. dump_register(DEPCMD(11)),
  335. dump_register(DEPCMD(12)),
  336. dump_register(DEPCMD(13)),
  337. dump_register(DEPCMD(14)),
  338. dump_register(DEPCMD(15)),
  339. dump_register(DEPCMD(16)),
  340. dump_register(DEPCMD(17)),
  341. dump_register(DEPCMD(18)),
  342. dump_register(DEPCMD(19)),
  343. dump_register(DEPCMD(20)),
  344. dump_register(DEPCMD(21)),
  345. dump_register(DEPCMD(22)),
  346. dump_register(DEPCMD(23)),
  347. dump_register(DEPCMD(24)),
  348. dump_register(DEPCMD(25)),
  349. dump_register(DEPCMD(26)),
  350. dump_register(DEPCMD(27)),
  351. dump_register(DEPCMD(28)),
  352. dump_register(DEPCMD(29)),
  353. dump_register(DEPCMD(30)),
  354. dump_register(DEPCMD(31)),
  355. dump_register(OCFG),
  356. dump_register(OCTL),
  357. dump_register(OEVT),
  358. dump_register(OEVTEN),
  359. dump_register(OSTS),
  360. };
  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;
  366. spin_lock_irqsave(&dwc->lock, flags);
  367. reg = dwc3_readl(dwc->regs, DWC3_GCTL);
  368. spin_unlock_irqrestore(&dwc->lock, flags);
  369. switch (DWC3_GCTL_PRTCAP(reg)) {
  370. case DWC3_GCTL_PRTCAP_HOST:
  371. seq_printf(s, "host\n");
  372. break;
  373. case DWC3_GCTL_PRTCAP_DEVICE:
  374. seq_printf(s, "device\n");
  375. break;
  376. case DWC3_GCTL_PRTCAP_OTG:
  377. seq_printf(s, "OTG\n");
  378. break;
  379. default:
  380. seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
  381. }
  382. return 0;
  383. }
  384. static int dwc3_mode_open(struct inode *inode, struct file *file)
  385. {
  386. return single_open(file, dwc3_mode_show, inode->i_private);
  387. }
  388. static ssize_t dwc3_mode_write(struct file *file,
  389. const char __user *ubuf, size_t count, loff_t *ppos)
  390. {
  391. struct seq_file *s = file->private_data;
  392. struct dwc3 *dwc = s->private;
  393. unsigned long flags;
  394. u32 mode = 0;
  395. char buf[32];
  396. if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  397. return -EFAULT;
  398. if (!strncmp(buf, "host", 4))
  399. mode |= DWC3_GCTL_PRTCAP_HOST;
  400. if (!strncmp(buf, "device", 6))
  401. mode |= DWC3_GCTL_PRTCAP_DEVICE;
  402. if (!strncmp(buf, "otg", 3))
  403. mode |= DWC3_GCTL_PRTCAP_OTG;
  404. if (mode) {
  405. spin_lock_irqsave(&dwc->lock, flags);
  406. dwc3_set_mode(dwc, mode);
  407. spin_unlock_irqrestore(&dwc->lock, flags);
  408. }
  409. return count;
  410. }
  411. static const struct file_operations dwc3_mode_fops = {
  412. .open = dwc3_mode_open,
  413. .write = dwc3_mode_write,
  414. .read = seq_read,
  415. .llseek = seq_lseek,
  416. .release = single_release,
  417. };
  418. static int dwc3_testmode_show(struct seq_file *s, void *unused)
  419. {
  420. struct dwc3 *dwc = s->private;
  421. unsigned long flags;
  422. u32 reg;
  423. spin_lock_irqsave(&dwc->lock, flags);
  424. reg = dwc3_readl(dwc->regs, DWC3_DCTL);
  425. reg &= DWC3_DCTL_TSTCTRL_MASK;
  426. reg >>= 1;
  427. spin_unlock_irqrestore(&dwc->lock, flags);
  428. switch (reg) {
  429. case 0:
  430. seq_printf(s, "no test\n");
  431. break;
  432. case TEST_J:
  433. seq_printf(s, "test_j\n");
  434. break;
  435. case TEST_K:
  436. seq_printf(s, "test_k\n");
  437. break;
  438. case TEST_SE0_NAK:
  439. seq_printf(s, "test_se0_nak\n");
  440. break;
  441. case TEST_PACKET:
  442. seq_printf(s, "test_packet\n");
  443. break;
  444. case TEST_FORCE_EN:
  445. seq_printf(s, "test_force_enable\n");
  446. break;
  447. default:
  448. seq_printf(s, "UNKNOWN %d\n", reg);
  449. }
  450. return 0;
  451. }
  452. static int dwc3_testmode_open(struct inode *inode, struct file *file)
  453. {
  454. return single_open(file, dwc3_testmode_show, inode->i_private);
  455. }
  456. static ssize_t dwc3_testmode_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. u32 testmode = 0;
  463. char buf[32];
  464. if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  465. return -EFAULT;
  466. if (!strncmp(buf, "test_j", 6))
  467. testmode = TEST_J;
  468. else if (!strncmp(buf, "test_k", 6))
  469. testmode = TEST_K;
  470. else if (!strncmp(buf, "test_se0_nak", 12))
  471. testmode = TEST_SE0_NAK;
  472. else if (!strncmp(buf, "test_packet", 11))
  473. testmode = TEST_PACKET;
  474. else if (!strncmp(buf, "test_force_enable", 17))
  475. testmode = TEST_FORCE_EN;
  476. else
  477. testmode = 0;
  478. spin_lock_irqsave(&dwc->lock, flags);
  479. dwc3_gadget_set_test_mode(dwc, testmode);
  480. spin_unlock_irqrestore(&dwc->lock, flags);
  481. return count;
  482. }
  483. static const struct file_operations dwc3_testmode_fops = {
  484. .open = dwc3_testmode_open,
  485. .write = dwc3_testmode_write,
  486. .read = seq_read,
  487. .llseek = seq_lseek,
  488. .release = single_release,
  489. };
  490. static int dwc3_link_state_show(struct seq_file *s, void *unused)
  491. {
  492. struct dwc3 *dwc = s->private;
  493. unsigned long flags;
  494. enum dwc3_link_state state;
  495. u32 reg;
  496. spin_lock_irqsave(&dwc->lock, flags);
  497. reg = dwc3_readl(dwc->regs, DWC3_DSTS);
  498. state = DWC3_DSTS_USBLNKST(reg);
  499. spin_unlock_irqrestore(&dwc->lock, flags);
  500. switch (state) {
  501. case DWC3_LINK_STATE_U0:
  502. seq_printf(s, "U0\n");
  503. break;
  504. case DWC3_LINK_STATE_U1:
  505. seq_printf(s, "U1\n");
  506. break;
  507. case DWC3_LINK_STATE_U2:
  508. seq_printf(s, "U2\n");
  509. break;
  510. case DWC3_LINK_STATE_U3:
  511. seq_printf(s, "U3\n");
  512. break;
  513. case DWC3_LINK_STATE_SS_DIS:
  514. seq_printf(s, "SS.Disabled\n");
  515. break;
  516. case DWC3_LINK_STATE_RX_DET:
  517. seq_printf(s, "Rx.Detect\n");
  518. break;
  519. case DWC3_LINK_STATE_SS_INACT:
  520. seq_printf(s, "SS.Inactive\n");
  521. break;
  522. case DWC3_LINK_STATE_POLL:
  523. seq_printf(s, "Poll\n");
  524. break;
  525. case DWC3_LINK_STATE_RECOV:
  526. seq_printf(s, "Recovery\n");
  527. break;
  528. case DWC3_LINK_STATE_HRESET:
  529. seq_printf(s, "HRESET\n");
  530. break;
  531. case DWC3_LINK_STATE_CMPLY:
  532. seq_printf(s, "Compliance\n");
  533. break;
  534. case DWC3_LINK_STATE_LPBK:
  535. seq_printf(s, "Loopback\n");
  536. break;
  537. case DWC3_LINK_STATE_RESET:
  538. seq_printf(s, "Reset\n");
  539. break;
  540. case DWC3_LINK_STATE_RESUME:
  541. seq_printf(s, "Resume\n");
  542. break;
  543. default:
  544. seq_printf(s, "UNKNOWN %d\n", state);
  545. }
  546. return 0;
  547. }
  548. static int dwc3_link_state_open(struct inode *inode, struct file *file)
  549. {
  550. return single_open(file, dwc3_link_state_show, inode->i_private);
  551. }
  552. static ssize_t dwc3_link_state_write(struct file *file,
  553. const char __user *ubuf, size_t count, loff_t *ppos)
  554. {
  555. struct seq_file *s = file->private_data;
  556. struct dwc3 *dwc = s->private;
  557. unsigned long flags;
  558. enum dwc3_link_state state = 0;
  559. char buf[32];
  560. if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
  561. return -EFAULT;
  562. if (!strncmp(buf, "SS.Disabled", 11))
  563. state = DWC3_LINK_STATE_SS_DIS;
  564. else if (!strncmp(buf, "Rx.Detect", 9))
  565. state = DWC3_LINK_STATE_RX_DET;
  566. else if (!strncmp(buf, "SS.Inactive", 11))
  567. state = DWC3_LINK_STATE_SS_INACT;
  568. else if (!strncmp(buf, "Recovery", 8))
  569. state = DWC3_LINK_STATE_RECOV;
  570. else if (!strncmp(buf, "Compliance", 10))
  571. state = DWC3_LINK_STATE_CMPLY;
  572. else if (!strncmp(buf, "Loopback", 8))
  573. state = DWC3_LINK_STATE_LPBK;
  574. else
  575. return -EINVAL;
  576. spin_lock_irqsave(&dwc->lock, flags);
  577. dwc3_gadget_set_link_state(dwc, state);
  578. spin_unlock_irqrestore(&dwc->lock, flags);
  579. return count;
  580. }
  581. static const struct file_operations dwc3_link_state_fops = {
  582. .open = dwc3_link_state_open,
  583. .write = dwc3_link_state_write,
  584. .read = seq_read,
  585. .llseek = seq_lseek,
  586. .release = single_release,
  587. };
  588. int dwc3_debugfs_init(struct dwc3 *dwc)
  589. {
  590. struct dentry *root;
  591. struct dentry *file;
  592. int ret;
  593. root = debugfs_create_dir(dev_name(dwc->dev), NULL);
  594. if (!root) {
  595. ret = -ENOMEM;
  596. goto err0;
  597. }
  598. dwc->root = root;
  599. dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
  600. if (!dwc->regset) {
  601. ret = -ENOMEM;
  602. goto err1;
  603. }
  604. dwc->regset->regs = dwc3_regs;
  605. dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
  606. dwc->regset->base = dwc->regs;
  607. file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
  608. if (!file) {
  609. ret = -ENOMEM;
  610. goto err1;
  611. }
  612. if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
  613. file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
  614. dwc, &dwc3_mode_fops);
  615. if (!file) {
  616. ret = -ENOMEM;
  617. goto err1;
  618. }
  619. }
  620. if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
  621. IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
  622. file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root,
  623. dwc, &dwc3_testmode_fops);
  624. if (!file) {
  625. ret = -ENOMEM;
  626. goto err1;
  627. }
  628. file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root,
  629. dwc, &dwc3_link_state_fops);
  630. if (!file) {
  631. ret = -ENOMEM;
  632. goto err1;
  633. }
  634. }
  635. return 0;
  636. err1:
  637. debugfs_remove_recursive(root);
  638. err0:
  639. return ret;
  640. }
  641. void dwc3_debugfs_exit(struct dwc3 *dwc)
  642. {
  643. debugfs_remove_recursive(dwc->root);
  644. dwc->root = NULL;
  645. }