bdc_udc.c 15 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589
  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * bdc_udc.c - BRCM BDC USB3.0 device controller gagdet ops
  4. *
  5. * Copyright (C) 2014 Broadcom Corporation
  6. *
  7. * Author: Ashwini Pahuja
  8. *
  9. * Based on drivers under drivers/usb/gadget/udc/
  10. */
  11. #include <linux/module.h>
  12. #include <linux/pci.h>
  13. #include <linux/dma-mapping.h>
  14. #include <linux/kernel.h>
  15. #include <linux/delay.h>
  16. #include <linux/ioport.h>
  17. #include <linux/sched.h>
  18. #include <linux/slab.h>
  19. #include <linux/errno.h>
  20. #include <linux/init.h>
  21. #include <linux/timer.h>
  22. #include <linux/list.h>
  23. #include <linux/interrupt.h>
  24. #include <linux/moduleparam.h>
  25. #include <linux/device.h>
  26. #include <linux/usb/ch9.h>
  27. #include <linux/usb/gadget.h>
  28. #include <linux/usb/otg.h>
  29. #include <linux/pm.h>
  30. #include <linux/io.h>
  31. #include <linux/irq.h>
  32. #include <asm/unaligned.h>
  33. #include <linux/platform_device.h>
  34. #include "bdc.h"
  35. #include "bdc_ep.h"
  36. #include "bdc_cmd.h"
  37. #include "bdc_dbg.h"
  38. static const struct usb_gadget_ops bdc_gadget_ops;
  39. static const char * const conn_speed_str[] = {
  40. "Not connected",
  41. "Full Speed",
  42. "Low Speed",
  43. "High Speed",
  44. "Super Speed",
  45. };
  46. /* EP0 initial descripror */
  47. static struct usb_endpoint_descriptor bdc_gadget_ep0_desc = {
  48. .bLength = USB_DT_ENDPOINT_SIZE,
  49. .bDescriptorType = USB_DT_ENDPOINT,
  50. .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
  51. .bEndpointAddress = 0,
  52. .wMaxPacketSize = cpu_to_le16(EP0_MAX_PKT_SIZE),
  53. };
  54. /* Advance the srr dqp maintained by SW */
  55. static void srr_dqp_index_advc(struct bdc *bdc, u32 srr_num)
  56. {
  57. struct srr *srr;
  58. srr = &bdc->srr;
  59. dev_dbg_ratelimited(bdc->dev, "srr->dqp_index:%d\n", srr->dqp_index);
  60. srr->dqp_index++;
  61. /* rollback to 0 if we are past the last */
  62. if (srr->dqp_index == NUM_SR_ENTRIES)
  63. srr->dqp_index = 0;
  64. }
  65. /* connect sr */
  66. static void bdc_uspc_connected(struct bdc *bdc)
  67. {
  68. u32 speed, temp;
  69. u32 usppms;
  70. int ret;
  71. temp = bdc_readl(bdc->regs, BDC_USPC);
  72. speed = BDC_PSP(temp);
  73. dev_dbg(bdc->dev, "%s speed=%x\n", __func__, speed);
  74. switch (speed) {
  75. case BDC_SPEED_SS:
  76. bdc_gadget_ep0_desc.wMaxPacketSize =
  77. cpu_to_le16(EP0_MAX_PKT_SIZE);
  78. bdc->gadget.ep0->maxpacket = EP0_MAX_PKT_SIZE;
  79. bdc->gadget.speed = USB_SPEED_SUPER;
  80. /* Enable U1T in SS mode */
  81. usppms = bdc_readl(bdc->regs, BDC_USPPMS);
  82. usppms &= ~BDC_U1T(0xff);
  83. usppms |= BDC_U1T(U1_TIMEOUT);
  84. usppms |= BDC_PORT_W1S;
  85. bdc_writel(bdc->regs, BDC_USPPMS, usppms);
  86. break;
  87. case BDC_SPEED_HS:
  88. bdc_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64);
  89. bdc->gadget.ep0->maxpacket = 64;
  90. bdc->gadget.speed = USB_SPEED_HIGH;
  91. break;
  92. case BDC_SPEED_FS:
  93. bdc_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64);
  94. bdc->gadget.ep0->maxpacket = 64;
  95. bdc->gadget.speed = USB_SPEED_FULL;
  96. break;
  97. case BDC_SPEED_LS:
  98. bdc_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8);
  99. bdc->gadget.ep0->maxpacket = 8;
  100. bdc->gadget.speed = USB_SPEED_LOW;
  101. break;
  102. default:
  103. dev_err(bdc->dev, "UNDEFINED SPEED\n");
  104. return;
  105. }
  106. dev_dbg(bdc->dev, "connected at %s\n", conn_speed_str[speed]);
  107. /* Now we know the speed, configure ep0 */
  108. bdc->bdc_ep_array[1]->desc = &bdc_gadget_ep0_desc;
  109. ret = bdc_config_ep(bdc, bdc->bdc_ep_array[1]);
  110. if (ret)
  111. dev_err(bdc->dev, "EP0 config failed\n");
  112. bdc->bdc_ep_array[1]->usb_ep.desc = &bdc_gadget_ep0_desc;
  113. bdc->bdc_ep_array[1]->flags |= BDC_EP_ENABLED;
  114. usb_gadget_set_state(&bdc->gadget, USB_STATE_DEFAULT);
  115. }
  116. /* device got disconnected */
  117. static void bdc_uspc_disconnected(struct bdc *bdc, bool reinit)
  118. {
  119. struct bdc_ep *ep;
  120. dev_dbg(bdc->dev, "%s\n", __func__);
  121. /*
  122. * Only stop ep0 from here, rest of the endpoints will be disabled
  123. * from gadget_disconnect
  124. */
  125. ep = bdc->bdc_ep_array[1];
  126. if (ep && (ep->flags & BDC_EP_ENABLED))
  127. /* if enabled then stop and remove requests */
  128. bdc_ep_disable(ep);
  129. if (bdc->gadget_driver && bdc->gadget_driver->disconnect) {
  130. spin_unlock(&bdc->lock);
  131. bdc->gadget_driver->disconnect(&bdc->gadget);
  132. spin_lock(&bdc->lock);
  133. }
  134. /* Set Unknown speed */
  135. bdc->gadget.speed = USB_SPEED_UNKNOWN;
  136. bdc->devstatus &= DEVSTATUS_CLEAR;
  137. bdc->delayed_status = false;
  138. bdc->reinit = reinit;
  139. bdc->test_mode = false;
  140. }
  141. /* TNotify wkaeup timer */
  142. static void bdc_func_wake_timer(struct work_struct *work)
  143. {
  144. struct bdc *bdc = container_of(work, struct bdc, func_wake_notify.work);
  145. unsigned long flags;
  146. dev_dbg(bdc->dev, "%s\n", __func__);
  147. spin_lock_irqsave(&bdc->lock, flags);
  148. /*
  149. * Check if host has started transferring on endpoints
  150. * FUNC_WAKE_ISSUED is cleared when transfer has started after resume
  151. */
  152. if (bdc->devstatus & FUNC_WAKE_ISSUED) {
  153. dev_dbg(bdc->dev, "FUNC_WAKE_ISSUED FLAG IS STILL SET\n");
  154. /* flag is still set, so again send func wake */
  155. bdc_function_wake_fh(bdc, 0);
  156. schedule_delayed_work(&bdc->func_wake_notify,
  157. msecs_to_jiffies(BDC_TNOTIFY));
  158. }
  159. spin_unlock_irqrestore(&bdc->lock, flags);
  160. }
  161. /* handler for Link state change condition */
  162. static void handle_link_state_change(struct bdc *bdc, u32 uspc)
  163. {
  164. u32 link_state;
  165. dev_dbg(bdc->dev, "Link state change");
  166. link_state = BDC_PST(uspc);
  167. switch (link_state) {
  168. case BDC_LINK_STATE_U3:
  169. if ((bdc->gadget.speed != USB_SPEED_UNKNOWN) &&
  170. bdc->gadget_driver->suspend) {
  171. dev_dbg(bdc->dev, "Entered Suspend mode\n");
  172. spin_unlock(&bdc->lock);
  173. bdc->devstatus |= DEVICE_SUSPENDED;
  174. bdc->gadget_driver->suspend(&bdc->gadget);
  175. spin_lock(&bdc->lock);
  176. }
  177. break;
  178. case BDC_LINK_STATE_U0:
  179. if (bdc->devstatus & REMOTE_WAKEUP_ISSUED) {
  180. bdc->devstatus &= ~REMOTE_WAKEUP_ISSUED;
  181. if (bdc->gadget.speed == USB_SPEED_SUPER) {
  182. bdc_function_wake_fh(bdc, 0);
  183. bdc->devstatus |= FUNC_WAKE_ISSUED;
  184. /*
  185. * Start a Notification timer and check if the
  186. * Host transferred anything on any of the EPs,
  187. * if not then send function wake again every
  188. * TNotification secs until host initiates
  189. * transfer to BDC, USB3 spec Table 8.13
  190. */
  191. schedule_delayed_work(
  192. &bdc->func_wake_notify,
  193. msecs_to_jiffies(BDC_TNOTIFY));
  194. dev_dbg(bdc->dev, "sched func_wake_notify\n");
  195. }
  196. }
  197. break;
  198. case BDC_LINK_STATE_RESUME:
  199. dev_dbg(bdc->dev, "Resumed from Suspend\n");
  200. if (bdc->devstatus & DEVICE_SUSPENDED) {
  201. bdc->gadget_driver->resume(&bdc->gadget);
  202. bdc->devstatus &= ~DEVICE_SUSPENDED;
  203. }
  204. break;
  205. default:
  206. dev_dbg(bdc->dev, "link state:%d\n", link_state);
  207. }
  208. }
  209. /* something changes on upstream port, handle it here */
  210. void bdc_sr_uspc(struct bdc *bdc, struct bdc_sr *sreport)
  211. {
  212. u32 clear_flags = 0;
  213. u32 uspc;
  214. bool connected = false;
  215. bool disconn = false;
  216. uspc = bdc_readl(bdc->regs, BDC_USPC);
  217. dev_dbg(bdc->dev, "%s uspc=0x%08x\n", __func__, uspc);
  218. /* Port connect changed */
  219. if (uspc & BDC_PCC) {
  220. /* Vbus not present, and not connected to Downstream port */
  221. if ((uspc & BDC_VBC) && !(uspc & BDC_VBS) && !(uspc & BDC_PCS))
  222. disconn = true;
  223. else if ((uspc & BDC_PCS) && !BDC_PST(uspc))
  224. connected = true;
  225. clear_flags |= BDC_PCC;
  226. }
  227. /* Change in VBus and VBus is present */
  228. if ((uspc & BDC_VBC) && (uspc & BDC_VBS)) {
  229. if (bdc->pullup) {
  230. dev_dbg(bdc->dev, "Do a softconnect\n");
  231. /* Attached state, do a softconnect */
  232. bdc_softconn(bdc);
  233. usb_gadget_set_state(&bdc->gadget, USB_STATE_POWERED);
  234. }
  235. clear_flags |= BDC_VBC;
  236. } else if ((uspc & BDC_PRS) || (uspc & BDC_PRC) || disconn) {
  237. /* Hot reset, warm reset, 2.0 bus reset or disconn */
  238. dev_dbg(bdc->dev, "Port reset or disconn\n");
  239. bdc_uspc_disconnected(bdc, disconn);
  240. clear_flags |= BDC_PRC;
  241. } else if ((uspc & BDC_PSC) && (uspc & BDC_PCS)) {
  242. /* Change in Link state */
  243. handle_link_state_change(bdc, uspc);
  244. clear_flags |= BDC_PSC;
  245. }
  246. /*
  247. * In SS we might not have PRC bit set before connection, but in 2.0
  248. * the PRC bit is set before connection, so moving this condition out
  249. * of bus reset to handle both SS/2.0 speeds.
  250. */
  251. if (connected) {
  252. /* This is the connect event for U0/L0 */
  253. dev_dbg(bdc->dev, "Connected\n");
  254. bdc_uspc_connected(bdc);
  255. bdc->devstatus &= ~(DEVICE_SUSPENDED);
  256. }
  257. uspc = bdc_readl(bdc->regs, BDC_USPC);
  258. uspc &= (~BDC_USPSC_RW);
  259. dev_dbg(bdc->dev, "uspc=%x\n", uspc);
  260. bdc_writel(bdc->regs, BDC_USPC, clear_flags);
  261. }
  262. /* Main interrupt handler for bdc */
  263. static irqreturn_t bdc_udc_interrupt(int irq, void *_bdc)
  264. {
  265. u32 eqp_index, dqp_index, sr_type, srr_int;
  266. struct bdc_sr *sreport;
  267. struct bdc *bdc = _bdc;
  268. u32 status;
  269. int ret;
  270. spin_lock(&bdc->lock);
  271. status = bdc_readl(bdc->regs, BDC_BDCSC);
  272. if (!(status & BDC_GIP)) {
  273. spin_unlock(&bdc->lock);
  274. return IRQ_NONE;
  275. }
  276. srr_int = bdc_readl(bdc->regs, BDC_SRRINT(0));
  277. /* Check if the SRR IP bit it set? */
  278. if (!(srr_int & BDC_SRR_IP)) {
  279. dev_warn(bdc->dev, "Global irq pending but SRR IP is 0\n");
  280. spin_unlock(&bdc->lock);
  281. return IRQ_NONE;
  282. }
  283. eqp_index = BDC_SRR_EPI(srr_int);
  284. dqp_index = BDC_SRR_DPI(srr_int);
  285. dev_dbg(bdc->dev,
  286. "%s eqp_index=%d dqp_index=%d srr.dqp_index=%d\n\n",
  287. __func__, eqp_index, dqp_index, bdc->srr.dqp_index);
  288. /* check for ring empty condition */
  289. if (eqp_index == dqp_index) {
  290. dev_dbg(bdc->dev, "SRR empty?\n");
  291. spin_unlock(&bdc->lock);
  292. return IRQ_HANDLED;
  293. }
  294. while (bdc->srr.dqp_index != eqp_index) {
  295. sreport = &bdc->srr.sr_bds[bdc->srr.dqp_index];
  296. /* sreport is read before using it */
  297. rmb();
  298. sr_type = le32_to_cpu(sreport->offset[3]) & BD_TYPE_BITMASK;
  299. dev_dbg_ratelimited(bdc->dev, "sr_type=%d\n", sr_type);
  300. switch (sr_type) {
  301. case SR_XSF:
  302. bdc->sr_handler[0](bdc, sreport);
  303. break;
  304. case SR_USPC:
  305. bdc->sr_handler[1](bdc, sreport);
  306. break;
  307. default:
  308. dev_warn(bdc->dev, "SR:%d not handled\n", sr_type);
  309. }
  310. /* Advance the srr dqp index */
  311. srr_dqp_index_advc(bdc, 0);
  312. }
  313. /* update the hw dequeue pointer */
  314. srr_int = bdc_readl(bdc->regs, BDC_SRRINT(0));
  315. srr_int &= ~BDC_SRR_DPI_MASK;
  316. srr_int &= ~(BDC_SRR_RWS|BDC_SRR_RST|BDC_SRR_ISR);
  317. srr_int |= ((bdc->srr.dqp_index) << 16);
  318. srr_int |= BDC_SRR_IP;
  319. bdc_writel(bdc->regs, BDC_SRRINT(0), srr_int);
  320. srr_int = bdc_readl(bdc->regs, BDC_SRRINT(0));
  321. if (bdc->reinit) {
  322. ret = bdc_reinit(bdc);
  323. if (ret)
  324. dev_err(bdc->dev, "err in bdc reinit\n");
  325. }
  326. spin_unlock(&bdc->lock);
  327. return IRQ_HANDLED;
  328. }
  329. /* Gadget ops */
  330. static int bdc_udc_start(struct usb_gadget *gadget,
  331. struct usb_gadget_driver *driver)
  332. {
  333. struct bdc *bdc = gadget_to_bdc(gadget);
  334. unsigned long flags;
  335. int ret = 0;
  336. dev_dbg(bdc->dev, "%s()\n", __func__);
  337. spin_lock_irqsave(&bdc->lock, flags);
  338. if (bdc->gadget_driver) {
  339. dev_err(bdc->dev, "%s is already bound to %s\n",
  340. bdc->gadget.name,
  341. bdc->gadget_driver->driver.name);
  342. ret = -EBUSY;
  343. goto err;
  344. }
  345. /*
  346. * Run the controller from here and when BDC is connected to
  347. * Host then driver will receive a USPC SR with VBUS present
  348. * and then driver will do a softconnect.
  349. */
  350. ret = bdc_run(bdc);
  351. if (ret) {
  352. dev_err(bdc->dev, "%s bdc run fail\n", __func__);
  353. goto err;
  354. }
  355. bdc->gadget_driver = driver;
  356. bdc->gadget.dev.driver = &driver->driver;
  357. err:
  358. spin_unlock_irqrestore(&bdc->lock, flags);
  359. return ret;
  360. }
  361. static int bdc_udc_stop(struct usb_gadget *gadget)
  362. {
  363. struct bdc *bdc = gadget_to_bdc(gadget);
  364. unsigned long flags;
  365. dev_dbg(bdc->dev, "%s()\n", __func__);
  366. spin_lock_irqsave(&bdc->lock, flags);
  367. bdc_stop(bdc);
  368. bdc->gadget_driver = NULL;
  369. bdc->gadget.dev.driver = NULL;
  370. spin_unlock_irqrestore(&bdc->lock, flags);
  371. return 0;
  372. }
  373. static int bdc_udc_pullup(struct usb_gadget *gadget, int is_on)
  374. {
  375. struct bdc *bdc = gadget_to_bdc(gadget);
  376. unsigned long flags;
  377. u32 uspc;
  378. dev_dbg(bdc->dev, "%s() is_on:%d\n", __func__, is_on);
  379. if (!gadget)
  380. return -EINVAL;
  381. spin_lock_irqsave(&bdc->lock, flags);
  382. if (!is_on) {
  383. bdc_softdisconn(bdc);
  384. bdc->pullup = false;
  385. } else {
  386. /*
  387. * For a self powered device, we need to wait till we receive
  388. * a VBUS change and Vbus present event, then if pullup flag
  389. * is set, then only we present the Termintation.
  390. */
  391. bdc->pullup = true;
  392. /*
  393. * Check if BDC is already connected to Host i.e Vbus=1,
  394. * if yes, then present TERM now, this is typical for bus
  395. * powered devices.
  396. */
  397. uspc = bdc_readl(bdc->regs, BDC_USPC);
  398. if (uspc & BDC_VBS)
  399. bdc_softconn(bdc);
  400. }
  401. spin_unlock_irqrestore(&bdc->lock, flags);
  402. return 0;
  403. }
  404. static int bdc_udc_set_selfpowered(struct usb_gadget *gadget,
  405. int is_self)
  406. {
  407. struct bdc *bdc = gadget_to_bdc(gadget);
  408. unsigned long flags;
  409. dev_dbg(bdc->dev, "%s()\n", __func__);
  410. gadget->is_selfpowered = (is_self != 0);
  411. spin_lock_irqsave(&bdc->lock, flags);
  412. if (!is_self)
  413. bdc->devstatus |= 1 << USB_DEVICE_SELF_POWERED;
  414. else
  415. bdc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
  416. spin_unlock_irqrestore(&bdc->lock, flags);
  417. return 0;
  418. }
  419. static int bdc_udc_wakeup(struct usb_gadget *gadget)
  420. {
  421. struct bdc *bdc = gadget_to_bdc(gadget);
  422. unsigned long flags;
  423. u8 link_state;
  424. u32 uspc;
  425. int ret = 0;
  426. dev_dbg(bdc->dev,
  427. "%s() bdc->devstatus=%08x\n",
  428. __func__, bdc->devstatus);
  429. if (!(bdc->devstatus & REMOTE_WAKE_ENABLE))
  430. return -EOPNOTSUPP;
  431. spin_lock_irqsave(&bdc->lock, flags);
  432. uspc = bdc_readl(bdc->regs, BDC_USPC);
  433. link_state = BDC_PST(uspc);
  434. dev_dbg(bdc->dev, "link_state =%d portsc=%x", link_state, uspc);
  435. if (link_state != BDC_LINK_STATE_U3) {
  436. dev_warn(bdc->dev,
  437. "can't wakeup from link state %d\n",
  438. link_state);
  439. ret = -EINVAL;
  440. goto out;
  441. }
  442. if (bdc->gadget.speed == USB_SPEED_SUPER)
  443. bdc->devstatus |= REMOTE_WAKEUP_ISSUED;
  444. uspc &= ~BDC_PST_MASK;
  445. uspc &= (~BDC_USPSC_RW);
  446. uspc |= BDC_PST(BDC_LINK_STATE_U0);
  447. uspc |= BDC_SWS;
  448. bdc_writel(bdc->regs, BDC_USPC, uspc);
  449. uspc = bdc_readl(bdc->regs, BDC_USPC);
  450. link_state = BDC_PST(uspc);
  451. dev_dbg(bdc->dev, "link_state =%d portsc=%x", link_state, uspc);
  452. out:
  453. spin_unlock_irqrestore(&bdc->lock, flags);
  454. return ret;
  455. }
  456. static const struct usb_gadget_ops bdc_gadget_ops = {
  457. .wakeup = bdc_udc_wakeup,
  458. .set_selfpowered = bdc_udc_set_selfpowered,
  459. .pullup = bdc_udc_pullup,
  460. .udc_start = bdc_udc_start,
  461. .udc_stop = bdc_udc_stop,
  462. };
  463. /* Init the gadget interface and register the udc */
  464. int bdc_udc_init(struct bdc *bdc)
  465. {
  466. u32 temp;
  467. int ret;
  468. dev_dbg(bdc->dev, "%s()\n", __func__);
  469. bdc->gadget.ops = &bdc_gadget_ops;
  470. bdc->gadget.max_speed = USB_SPEED_SUPER;
  471. bdc->gadget.speed = USB_SPEED_UNKNOWN;
  472. bdc->gadget.dev.parent = bdc->dev;
  473. bdc->gadget.sg_supported = false;
  474. bdc->gadget.name = BRCM_BDC_NAME;
  475. ret = devm_request_irq(bdc->dev, bdc->irq, bdc_udc_interrupt,
  476. IRQF_SHARED , BRCM_BDC_NAME, bdc);
  477. if (ret) {
  478. dev_err(bdc->dev,
  479. "failed to request irq #%d %d\n",
  480. bdc->irq, ret);
  481. return ret;
  482. }
  483. ret = bdc_init_ep(bdc);
  484. if (ret) {
  485. dev_err(bdc->dev, "bdc init ep fail: %d\n", ret);
  486. return ret;
  487. }
  488. ret = usb_add_gadget_udc(bdc->dev, &bdc->gadget);
  489. if (ret) {
  490. dev_err(bdc->dev, "failed to register udc\n");
  491. goto err0;
  492. }
  493. usb_gadget_set_state(&bdc->gadget, USB_STATE_NOTATTACHED);
  494. bdc->bdc_ep_array[1]->desc = &bdc_gadget_ep0_desc;
  495. /*
  496. * Allocate bd list for ep0 only, ep0 will be enabled on connect
  497. * status report when the speed is known
  498. */
  499. ret = bdc_ep_enable(bdc->bdc_ep_array[1]);
  500. if (ret) {
  501. dev_err(bdc->dev, "fail to enable %s\n",
  502. bdc->bdc_ep_array[1]->name);
  503. goto err1;
  504. }
  505. INIT_DELAYED_WORK(&bdc->func_wake_notify, bdc_func_wake_timer);
  506. /* Enable Interrupts */
  507. temp = bdc_readl(bdc->regs, BDC_BDCSC);
  508. temp |= BDC_GIE;
  509. bdc_writel(bdc->regs, BDC_BDCSC, temp);
  510. return 0;
  511. err1:
  512. usb_del_gadget_udc(&bdc->gadget);
  513. err0:
  514. bdc_free_ep(bdc);
  515. return ret;
  516. }
  517. void bdc_udc_exit(struct bdc *bdc)
  518. {
  519. unsigned long flags;
  520. dev_dbg(bdc->dev, "%s()\n", __func__);
  521. spin_lock_irqsave(&bdc->lock, flags);
  522. bdc_ep_disable(bdc->bdc_ep_array[1]);
  523. spin_unlock_irqrestore(&bdc->lock, flags);
  524. usb_del_gadget_udc(&bdc->gadget);
  525. bdc_free_ep(bdc);
  526. }