1// SPDX-License-Identifier: GPL-2.0 2/* 3 * mtu3_gadget.c - MediaTek usb3 DRD peripheral support 4 * 5 * Copyright (C) 2016 MediaTek Inc. 6 * 7 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com> 8 */ 9 10#include "mtu3.h" 11#include "mtu3_trace.h" 12 13void mtu3_req_complete(struct mtu3_ep *mep, 14 struct usb_request *req, int status) 15__releases(mep->mtu->lock) 16__acquires(mep->mtu->lock) 17{ 18 struct mtu3_request *mreq = to_mtu3_request(req); 19 struct mtu3 *mtu = mreq->mtu; 20 21 list_del(&mreq->list); 22 if (req->status == -EINPROGRESS) 23 req->status = status; 24 25 trace_mtu3_req_complete(mreq); 26 27 /* ep0 makes use of PIO, needn't unmap it */ 28 if (mep->epnum) 29 usb_gadget_unmap_request(&mtu->g, req, mep->is_in); 30 31 dev_dbg(mtu->dev, "%s complete req: %p, sts %d, %d/%d\n", 32 mep->name, req, req->status, req->actual, req->length); 33 34 spin_unlock(&mtu->lock); 35 usb_gadget_giveback_request(&mep->ep, req); 36 spin_lock(&mtu->lock); 37} 38 39static void nuke(struct mtu3_ep *mep, const int status) 40{ 41 struct mtu3_request *mreq = NULL; 42 43 if (list_empty(&mep->req_list)) 44 return; 45 46 dev_dbg(mep->mtu->dev, "abort %s's req: sts %d\n", mep->name, status); 47 48 /* exclude EP0 */ 49 if (mep->epnum) 50 mtu3_qmu_flush(mep); 51 52 while (!list_empty(&mep->req_list)) { 53 mreq = list_first_entry(&mep->req_list, 54 struct mtu3_request, list); 55 mtu3_req_complete(mep, &mreq->request, status); 56 } 57} 58 59static int mtu3_ep_enable(struct mtu3_ep *mep) 60{ 61 const struct usb_endpoint_descriptor *desc; 62 const struct usb_ss_ep_comp_descriptor *comp_desc; 63 struct mtu3 *mtu = mep->mtu; 64 u32 interval = 0; 65 u32 mult = 0; 66 u32 burst = 0; 67 int ret; 68 69 desc = mep->desc; 70 comp_desc = mep->comp_desc; 71 mep->type = usb_endpoint_type(desc); 72 mep->maxp = usb_endpoint_maxp(desc); 73 74 switch (mtu->g.speed) { 75 case USB_SPEED_SUPER: 76 case USB_SPEED_SUPER_PLUS: 77 if (usb_endpoint_xfer_int(desc) || 78 usb_endpoint_xfer_isoc(desc)) { 79 interval = desc->bInterval; 80 interval = clamp_val(interval, 1, 16); 81 if (usb_endpoint_xfer_isoc(desc) && comp_desc) 82 mult = comp_desc->bmAttributes; 83 } 84 if (comp_desc) 85 burst = comp_desc->bMaxBurst; 86 87 break; 88 case USB_SPEED_HIGH: 89 if (usb_endpoint_xfer_isoc(desc) || 90 usb_endpoint_xfer_int(desc)) { 91 interval = desc->bInterval; 92 interval = clamp_val(interval, 1, 16); 93 mult = usb_endpoint_maxp_mult(desc) - 1; 94 } 95 break; 96 case USB_SPEED_FULL: 97 if (usb_endpoint_xfer_isoc(desc)) 98 interval = clamp_val(desc->bInterval, 1, 16); 99 else if (usb_endpoint_xfer_int(desc)) 100 interval = clamp_val(desc->bInterval, 1, 255); 101 102 break; 103 default: 104 break; /*others are ignored */ 105 } 106 107 dev_dbg(mtu->dev, "%s maxp:%d, interval:%d, burst:%d, mult:%d\n", 108 __func__, mep->maxp, interval, burst, mult); 109 110 mep->ep.maxpacket = mep->maxp; 111 mep->ep.desc = desc; 112 mep->ep.comp_desc = comp_desc; 113 114 /* slot mainly affects bulk/isoc transfer, so ignore int */ 115 mep->slot = usb_endpoint_xfer_int(desc) ? 0 : mtu->slot; 116 117 ret = mtu3_config_ep(mtu, mep, interval, burst, mult); 118 if (ret < 0) 119 return ret; 120 121 ret = mtu3_gpd_ring_alloc(mep); 122 if (ret < 0) { 123 mtu3_deconfig_ep(mtu, mep); 124 return ret; 125 } 126 127 mtu3_qmu_start(mep); 128 129 return 0; 130} 131 132static int mtu3_ep_disable(struct mtu3_ep *mep) 133{ 134 struct mtu3 *mtu = mep->mtu; 135 136 /* abort all pending requests */ 137 nuke(mep, -ESHUTDOWN); 138 mtu3_qmu_stop(mep); 139 mtu3_deconfig_ep(mtu, mep); 140 mtu3_gpd_ring_free(mep); 141 142 mep->desc = NULL; 143 mep->ep.desc = NULL; 144 mep->comp_desc = NULL; 145 mep->type = 0; 146 mep->flags = 0; 147 148 return 0; 149} 150 151static int mtu3_gadget_ep_enable(struct usb_ep *ep, 152 const struct usb_endpoint_descriptor *desc) 153{ 154 struct mtu3_ep *mep; 155 struct mtu3 *mtu; 156 unsigned long flags; 157 int ret = -EINVAL; 158 159 if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { 160 pr_debug("%s invalid parameters\n", __func__); 161 return -EINVAL; 162 } 163 164 if (!desc->wMaxPacketSize) { 165 pr_debug("%s missing wMaxPacketSize\n", __func__); 166 return -EINVAL; 167 } 168 mep = to_mtu3_ep(ep); 169 mtu = mep->mtu; 170 171 /* check ep number and direction against endpoint */ 172 if (usb_endpoint_num(desc) != mep->epnum) 173 return -EINVAL; 174 175 if (!!usb_endpoint_dir_in(desc) ^ !!mep->is_in) 176 return -EINVAL; 177 178 dev_dbg(mtu->dev, "%s %s\n", __func__, ep->name); 179 180 if (mep->flags & MTU3_EP_ENABLED) { 181 dev_WARN_ONCE(mtu->dev, true, "%s is already enabled\n", 182 mep->name); 183 return 0; 184 } 185 186 spin_lock_irqsave(&mtu->lock, flags); 187 mep->desc = desc; 188 mep->comp_desc = ep->comp_desc; 189 190 ret = mtu3_ep_enable(mep); 191 if (ret) 192 goto error; 193 194 mep->flags = MTU3_EP_ENABLED; 195 mtu->active_ep++; 196 197error: 198 spin_unlock_irqrestore(&mtu->lock, flags); 199 200 dev_dbg(mtu->dev, "%s active_ep=%d\n", __func__, mtu->active_ep); 201 trace_mtu3_gadget_ep_enable(mep); 202 203 return ret; 204} 205 206static int mtu3_gadget_ep_disable(struct usb_ep *ep) 207{ 208 struct mtu3_ep *mep = to_mtu3_ep(ep); 209 struct mtu3 *mtu = mep->mtu; 210 unsigned long flags; 211 212 dev_dbg(mtu->dev, "%s %s\n", __func__, mep->name); 213 trace_mtu3_gadget_ep_disable(mep); 214 215 if (!(mep->flags & MTU3_EP_ENABLED)) { 216 dev_warn(mtu->dev, "%s is already disabled\n", mep->name); 217 return 0; 218 } 219 220 spin_lock_irqsave(&mtu->lock, flags); 221 mtu3_ep_disable(mep); 222 mep->flags = 0; 223 mtu->active_ep--; 224 spin_unlock_irqrestore(&(mtu->lock), flags); 225 226 dev_dbg(mtu->dev, "%s active_ep=%d, mtu3 is_active=%d\n", 227 __func__, mtu->active_ep, mtu->is_active); 228 229 return 0; 230} 231 232struct usb_request *mtu3_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) 233{ 234 struct mtu3_ep *mep = to_mtu3_ep(ep); 235 struct mtu3_request *mreq; 236 237 mreq = kzalloc(sizeof(*mreq), gfp_flags); 238 if (!mreq) 239 return NULL; 240 241 mreq->request.dma = DMA_ADDR_INVALID; 242 mreq->epnum = mep->epnum; 243 mreq->mep = mep; 244 INIT_LIST_HEAD(&mreq->list); 245 trace_mtu3_alloc_request(mreq); 246 247 return &mreq->request; 248} 249 250void mtu3_free_request(struct usb_ep *ep, struct usb_request *req) 251{ 252 struct mtu3_request *mreq = to_mtu3_request(req); 253 254 trace_mtu3_free_request(mreq); 255 kfree(mreq); 256} 257 258static int mtu3_gadget_queue(struct usb_ep *ep, 259 struct usb_request *req, gfp_t gfp_flags) 260{ 261 struct mtu3_ep *mep = to_mtu3_ep(ep); 262 struct mtu3_request *mreq = to_mtu3_request(req); 263 struct mtu3 *mtu = mep->mtu; 264 unsigned long flags; 265 int ret = 0; 266 267 if (!req->buf) 268 return -ENODATA; 269 270 if (mreq->mep != mep) 271 return -EINVAL; 272 273 dev_dbg(mtu->dev, "%s %s EP%d(%s), req=%p, maxp=%d, len#%d\n", 274 __func__, mep->is_in ? "TX" : "RX", mreq->epnum, ep->name, 275 mreq, ep->maxpacket, mreq->request.length); 276 277 if (req->length > GPD_BUF_SIZE || 278 (mtu->gen2cp && req->length > GPD_BUF_SIZE_EL)) { 279 dev_warn(mtu->dev, 280 "req length > supported MAX:%d requested:%d\n", 281 mtu->gen2cp ? GPD_BUF_SIZE_EL : GPD_BUF_SIZE, 282 req->length); 283 return -EOPNOTSUPP; 284 } 285 286 /* don't queue if the ep is down */ 287 if (!mep->desc) { 288 dev_dbg(mtu->dev, "req=%p queued to %s while it's disabled\n", 289 req, ep->name); 290 return -ESHUTDOWN; 291 } 292 293 mreq->mtu = mtu; 294 mreq->request.actual = 0; 295 mreq->request.status = -EINPROGRESS; 296 297 ret = usb_gadget_map_request(&mtu->g, req, mep->is_in); 298 if (ret) { 299 dev_err(mtu->dev, "dma mapping failed\n"); 300 return ret; 301 } 302 303 spin_lock_irqsave(&mtu->lock, flags); 304 305 if (mtu3_prepare_transfer(mep)) { 306 ret = -EAGAIN; 307 goto error; 308 } 309 310 list_add_tail(&mreq->list, &mep->req_list); 311 mtu3_insert_gpd(mep, mreq); 312 mtu3_qmu_resume(mep); 313 314error: 315 spin_unlock_irqrestore(&mtu->lock, flags); 316 trace_mtu3_gadget_queue(mreq); 317 318 return ret; 319} 320 321static int mtu3_gadget_dequeue(struct usb_ep *ep, struct usb_request *req) 322{ 323 struct mtu3_ep *mep = to_mtu3_ep(ep); 324 struct mtu3_request *mreq = to_mtu3_request(req); 325 struct mtu3_request *r; 326 struct mtu3 *mtu = mep->mtu; 327 unsigned long flags; 328 int ret = 0; 329 330 if (mreq->mep != mep) 331 return -EINVAL; 332 333 dev_dbg(mtu->dev, "%s : req=%p\n", __func__, req); 334 trace_mtu3_gadget_dequeue(mreq); 335 336 spin_lock_irqsave(&mtu->lock, flags); 337 338 list_for_each_entry(r, &mep->req_list, list) { 339 if (r == mreq) 340 break; 341 } 342 if (r != mreq) { 343 dev_dbg(mtu->dev, "req=%p not queued to %s\n", req, ep->name); 344 ret = -EINVAL; 345 goto done; 346 } 347 348 mtu3_qmu_flush(mep); /* REVISIT: set BPS ?? */ 349 mtu3_req_complete(mep, req, -ECONNRESET); 350 mtu3_qmu_start(mep); 351 352done: 353 spin_unlock_irqrestore(&mtu->lock, flags); 354 355 return ret; 356} 357 358/* 359 * Set or clear the halt bit of an EP. 360 * A halted EP won't TX/RX any data but will queue requests. 361 */ 362static int mtu3_gadget_ep_set_halt(struct usb_ep *ep, int value) 363{ 364 struct mtu3_ep *mep = to_mtu3_ep(ep); 365 struct mtu3 *mtu = mep->mtu; 366 struct mtu3_request *mreq; 367 unsigned long flags; 368 int ret = 0; 369 370 dev_dbg(mtu->dev, "%s : %s...", __func__, ep->name); 371 372 spin_lock_irqsave(&mtu->lock, flags); 373 374 if (mep->type == USB_ENDPOINT_XFER_ISOC) { 375 ret = -EINVAL; 376 goto done; 377 } 378 379 mreq = next_request(mep); 380 if (value) { 381 /* 382 * If there is not request for TX-EP, QMU will not transfer 383 * data to TX-FIFO, so no need check whether TX-FIFO 384 * holds bytes or not here 385 */ 386 if (mreq) { 387 dev_dbg(mtu->dev, "req in progress, cannot halt %s\n", 388 ep->name); 389 ret = -EAGAIN; 390 goto done; 391 } 392 } else { 393 mep->flags &= ~MTU3_EP_WEDGE; 394 } 395 396 dev_dbg(mtu->dev, "%s %s stall\n", ep->name, value ? "set" : "clear"); 397 398 mtu3_ep_stall_set(mep, value); 399 400done: 401 spin_unlock_irqrestore(&mtu->lock, flags); 402 trace_mtu3_gadget_ep_set_halt(mep); 403 404 return ret; 405} 406 407/* Sets the halt feature with the clear requests ignored */ 408static int mtu3_gadget_ep_set_wedge(struct usb_ep *ep) 409{ 410 struct mtu3_ep *mep = to_mtu3_ep(ep); 411 412 mep->flags |= MTU3_EP_WEDGE; 413 414 return usb_ep_set_halt(ep); 415} 416 417static const struct usb_ep_ops mtu3_ep_ops = { 418 .enable = mtu3_gadget_ep_enable, 419 .disable = mtu3_gadget_ep_disable, 420 .alloc_request = mtu3_alloc_request, 421 .free_request = mtu3_free_request, 422 .queue = mtu3_gadget_queue, 423 .dequeue = mtu3_gadget_dequeue, 424 .set_halt = mtu3_gadget_ep_set_halt, 425 .set_wedge = mtu3_gadget_ep_set_wedge, 426}; 427 428static int mtu3_gadget_get_frame(struct usb_gadget *gadget) 429{ 430 struct mtu3 *mtu = gadget_to_mtu3(gadget); 431 432 return (int)mtu3_readl(mtu->mac_base, U3D_USB20_FRAME_NUM); 433} 434 435static void function_wake_notif(struct mtu3 *mtu, u8 intf) 436{ 437 mtu3_writel(mtu->mac_base, U3D_DEV_NOTIF_0, 438 TYPE_FUNCTION_WAKE | DEV_NOTIF_VAL_FW(intf)); 439 mtu3_setbits(mtu->mac_base, U3D_DEV_NOTIF_0, SEND_DEV_NOTIF); 440} 441 442static int mtu3_gadget_wakeup(struct usb_gadget *gadget) 443{ 444 struct mtu3 *mtu = gadget_to_mtu3(gadget); 445 unsigned long flags; 446 447 dev_dbg(mtu->dev, "%s\n", __func__); 448 449 /* remote wakeup feature is not enabled by host */ 450 if (!mtu->may_wakeup) 451 return -EOPNOTSUPP; 452 453 spin_lock_irqsave(&mtu->lock, flags); 454 if (mtu->g.speed >= USB_SPEED_SUPER) { 455 /* 456 * class driver may do function wakeup even UFP is in U0, 457 * and UX_EXIT only takes effect in U1/U2/U3; 458 */ 459 mtu3_setbits(mtu->mac_base, U3D_LINK_POWER_CONTROL, UX_EXIT); 460 /* 461 * Assume there's only one function on the composite device 462 * and enable remote wake for the first interface. 463 * FIXME if the IAD (interface association descriptor) shows 464 * there is more than one function. 465 */ 466 function_wake_notif(mtu, 0); 467 } else { 468 mtu3_setbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); 469 spin_unlock_irqrestore(&mtu->lock, flags); 470 usleep_range(10000, 11000); 471 spin_lock_irqsave(&mtu->lock, flags); 472 mtu3_clrbits(mtu->mac_base, U3D_POWER_MANAGEMENT, RESUME); 473 } 474 spin_unlock_irqrestore(&mtu->lock, flags); 475 return 0; 476} 477 478static int mtu3_gadget_set_self_powered(struct usb_gadget *gadget, 479 int is_selfpowered) 480{ 481 struct mtu3 *mtu = gadget_to_mtu3(gadget); 482 483 mtu->is_self_powered = !!is_selfpowered; 484 return 0; 485} 486 487static int mtu3_gadget_pullup(struct usb_gadget *gadget, int is_on) 488{ 489 struct mtu3 *mtu = gadget_to_mtu3(gadget); 490 unsigned long flags; 491 492 dev_dbg(mtu->dev, "%s (%s) for %sactive device\n", __func__, 493 is_on ? "on" : "off", mtu->is_active ? "" : "in"); 494 495 pm_runtime_get_sync(mtu->dev); 496 497 /* we'd rather not pullup unless the device is active. */ 498 spin_lock_irqsave(&mtu->lock, flags); 499 500 is_on = !!is_on; 501 if (!mtu->is_active) { 502 /* save it for mtu3_start() to process the request */ 503 mtu->softconnect = is_on; 504 } else if (is_on != mtu->softconnect) { 505 mtu->softconnect = is_on; 506 mtu3_dev_on_off(mtu, is_on); 507 } 508 509 spin_unlock_irqrestore(&mtu->lock, flags); 510 pm_runtime_put(mtu->dev); 511 512 return 0; 513} 514 515static int mtu3_gadget_start(struct usb_gadget *gadget, 516 struct usb_gadget_driver *driver) 517{ 518 struct mtu3 *mtu = gadget_to_mtu3(gadget); 519 unsigned long flags; 520 521 if (mtu->gadget_driver) { 522 dev_err(mtu->dev, "%s is already bound to %s\n", 523 mtu->g.name, mtu->gadget_driver->driver.name); 524 return -EBUSY; 525 } 526 527 dev_dbg(mtu->dev, "bind driver %s\n", driver->function); 528 pm_runtime_get_sync(mtu->dev); 529 530 spin_lock_irqsave(&mtu->lock, flags); 531 532 mtu->softconnect = 0; 533 mtu->gadget_driver = driver; 534 535 if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) 536 mtu3_start(mtu); 537 538 spin_unlock_irqrestore(&mtu->lock, flags); 539 pm_runtime_put(mtu->dev); 540 541 return 0; 542} 543 544static void stop_activity(struct mtu3 *mtu) 545{ 546 struct usb_gadget_driver *driver = mtu->gadget_driver; 547 int i; 548 549 /* don't disconnect if it's not connected */ 550 if (mtu->g.speed == USB_SPEED_UNKNOWN) 551 driver = NULL; 552 else 553 mtu->g.speed = USB_SPEED_UNKNOWN; 554 555 /* deactivate the hardware */ 556 if (mtu->softconnect) { 557 mtu->softconnect = 0; 558 mtu3_dev_on_off(mtu, 0); 559 } 560 561 /* 562 * killing any outstanding requests will quiesce the driver; 563 * then report disconnect 564 */ 565 nuke(mtu->ep0, -ESHUTDOWN); 566 for (i = 1; i < mtu->num_eps; i++) { 567 nuke(mtu->in_eps + i, -ESHUTDOWN); 568 nuke(mtu->out_eps + i, -ESHUTDOWN); 569 } 570 571 if (driver) { 572 spin_unlock(&mtu->lock); 573 driver->disconnect(&mtu->g); 574 spin_lock(&mtu->lock); 575 } 576} 577 578static int mtu3_gadget_stop(struct usb_gadget *g) 579{ 580 struct mtu3 *mtu = gadget_to_mtu3(g); 581 unsigned long flags; 582 583 dev_dbg(mtu->dev, "%s\n", __func__); 584 585 spin_lock_irqsave(&mtu->lock, flags); 586 587 stop_activity(mtu); 588 mtu->gadget_driver = NULL; 589 590 if (mtu->ssusb->dr_mode == USB_DR_MODE_PERIPHERAL) 591 mtu3_stop(mtu); 592 593 spin_unlock_irqrestore(&mtu->lock, flags); 594 595 synchronize_irq(mtu->irq); 596 return 0; 597} 598 599static void 600mtu3_gadget_set_speed(struct usb_gadget *g, enum usb_device_speed speed) 601{ 602 struct mtu3 *mtu = gadget_to_mtu3(g); 603 unsigned long flags; 604 605 dev_dbg(mtu->dev, "%s %s\n", __func__, usb_speed_string(speed)); 606 607 spin_lock_irqsave(&mtu->lock, flags); 608 mtu->speed = speed; 609 spin_unlock_irqrestore(&mtu->lock, flags); 610} 611 612static void mtu3_gadget_async_callbacks(struct usb_gadget *g, bool enable) 613{ 614 struct mtu3 *mtu = gadget_to_mtu3(g); 615 unsigned long flags; 616 617 dev_dbg(mtu->dev, "%s %s\n", __func__, enable ? "en" : "dis"); 618 619 spin_lock_irqsave(&mtu->lock, flags); 620 mtu->async_callbacks = enable; 621 spin_unlock_irqrestore(&mtu->lock, flags); 622} 623 624static const struct usb_gadget_ops mtu3_gadget_ops = { 625 .get_frame = mtu3_gadget_get_frame, 626 .wakeup = mtu3_gadget_wakeup, 627 .set_selfpowered = mtu3_gadget_set_self_powered, 628 .pullup = mtu3_gadget_pullup, 629 .udc_start = mtu3_gadget_start, 630 .udc_stop = mtu3_gadget_stop, 631 .udc_set_speed = mtu3_gadget_set_speed, 632 .udc_async_callbacks = mtu3_gadget_async_callbacks, 633}; 634 635static void mtu3_state_reset(struct mtu3 *mtu) 636{ 637 mtu->address = 0; 638 mtu->ep0_state = MU3D_EP0_STATE_SETUP; 639 mtu->may_wakeup = 0; 640 mtu->u1_enable = 0; 641 mtu->u2_enable = 0; 642 mtu->delayed_status = false; 643 mtu->test_mode = false; 644} 645 646static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep, 647 u32 epnum, u32 is_in) 648{ 649 mep->epnum = epnum; 650 mep->mtu = mtu; 651 mep->is_in = is_in; 652 653 INIT_LIST_HEAD(&mep->req_list); 654 655 sprintf(mep->name, "ep%d%s", epnum, 656 !epnum ? "" : (is_in ? "in" : "out")); 657 658 mep->ep.name = mep->name; 659 INIT_LIST_HEAD(&mep->ep.ep_list); 660 661 /* initialize maxpacket as SS */ 662 if (!epnum) { 663 usb_ep_set_maxpacket_limit(&mep->ep, 512); 664 mep->ep.caps.type_control = true; 665 mep->ep.ops = &mtu3_ep0_ops; 666 mtu->g.ep0 = &mep->ep; 667 } else { 668 usb_ep_set_maxpacket_limit(&mep->ep, 1024); 669 mep->ep.caps.type_iso = true; 670 mep->ep.caps.type_bulk = true; 671 mep->ep.caps.type_int = true; 672 mep->ep.ops = &mtu3_ep_ops; 673 list_add_tail(&mep->ep.ep_list, &mtu->g.ep_list); 674 } 675 676 dev_dbg(mtu->dev, "%s, name=%s, maxp=%d\n", __func__, mep->ep.name, 677 mep->ep.maxpacket); 678 679 if (!epnum) { 680 mep->ep.caps.dir_in = true; 681 mep->ep.caps.dir_out = true; 682 } else if (is_in) { 683 mep->ep.caps.dir_in = true; 684 } else { 685 mep->ep.caps.dir_out = true; 686 } 687} 688 689static void mtu3_gadget_init_eps(struct mtu3 *mtu) 690{ 691 u8 epnum; 692 693 /* initialize endpoint list just once */ 694 INIT_LIST_HEAD(&(mtu->g.ep_list)); 695 696 dev_dbg(mtu->dev, "%s num_eps(1 for a pair of tx&rx ep)=%d\n", 697 __func__, mtu->num_eps); 698 699 init_hw_ep(mtu, mtu->ep0, 0, 0); 700 for (epnum = 1; epnum < mtu->num_eps; epnum++) { 701 init_hw_ep(mtu, mtu->in_eps + epnum, epnum, 1); 702 init_hw_ep(mtu, mtu->out_eps + epnum, epnum, 0); 703 } 704} 705 706int mtu3_gadget_setup(struct mtu3 *mtu) 707{ 708 mtu->g.ops = &mtu3_gadget_ops; 709 mtu->g.max_speed = mtu->max_speed; 710 mtu->g.speed = USB_SPEED_UNKNOWN; 711 mtu->g.sg_supported = 0; 712 mtu->g.name = MTU3_DRIVER_NAME; 713 mtu->g.irq = mtu->irq; 714 mtu->is_active = 0; 715 mtu->delayed_status = false; 716 717 mtu3_gadget_init_eps(mtu); 718 719 return usb_add_gadget_udc(mtu->dev, &mtu->g); 720} 721 722void mtu3_gadget_cleanup(struct mtu3 *mtu) 723{ 724 usb_del_gadget_udc(&mtu->g); 725} 726 727void mtu3_gadget_resume(struct mtu3 *mtu) 728{ 729 dev_dbg(mtu->dev, "gadget RESUME\n"); 730 if (mtu->async_callbacks && mtu->gadget_driver && mtu->gadget_driver->resume) { 731 spin_unlock(&mtu->lock); 732 mtu->gadget_driver->resume(&mtu->g); 733 spin_lock(&mtu->lock); 734 } 735} 736 737/* called when SOF packets stop for 3+ msec or enters U3 */ 738void mtu3_gadget_suspend(struct mtu3 *mtu) 739{ 740 dev_dbg(mtu->dev, "gadget SUSPEND\n"); 741 if (mtu->async_callbacks && mtu->gadget_driver && mtu->gadget_driver->suspend) { 742 spin_unlock(&mtu->lock); 743 mtu->gadget_driver->suspend(&mtu->g); 744 spin_lock(&mtu->lock); 745 } 746} 747 748/* called when VBUS drops below session threshold, and in other cases */ 749void mtu3_gadget_disconnect(struct mtu3 *mtu) 750{ 751 dev_dbg(mtu->dev, "gadget DISCONNECT\n"); 752 if (mtu->async_callbacks && mtu->gadget_driver && mtu->gadget_driver->disconnect) { 753 spin_unlock(&mtu->lock); 754 mtu->gadget_driver->disconnect(&mtu->g); 755 spin_lock(&mtu->lock); 756 } 757 758 mtu3_state_reset(mtu); 759 usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED); 760} 761 762void mtu3_gadget_reset(struct mtu3 *mtu) 763{ 764 dev_dbg(mtu->dev, "gadget RESET\n"); 765 766 /* report disconnect, if we didn't flush EP state */ 767 if (mtu->g.speed != USB_SPEED_UNKNOWN) 768 mtu3_gadget_disconnect(mtu); 769 else 770 mtu3_state_reset(mtu); 771} 772