1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Cadence USBSS DRD Driver. 4 * 5 * Copyright (C) 2018-2019 Cadence. 6 * Copyright (C) 2017-2018 NXP 7 * Copyright (C) 2019 Texas Instruments 8 * 9 * Author: Peter Chen <peter.chen@nxp.com> 10 * Pawel Laszczak <pawell@cadence.com> 11 * Roger Quadros <rogerq@ti.com> 12 */ 13 14 #include <linux/dma-mapping.h> 15 #include <linux/module.h> 16 #include <linux/kernel.h> 17 #include <linux/platform_device.h> 18 #include <linux/interrupt.h> 19 #include <linux/io.h> 20 #include <linux/pm_runtime.h> 21 22 #include "gadget.h" 23 #include "core.h" 24 #include "host-export.h" 25 #include "gadget-export.h" 26 #include "drd.h" 27 28 static int cdns3_idle_init(struct cdns3 *cdns); 29 30 static int cdns3_role_start(struct cdns3 *cdns, enum usb_role role) 31 { 32 int ret; 33 34 if (WARN_ON(role > USB_ROLE_DEVICE)) 35 return 0; 36 37 mutex_lock(&cdns->mutex); 38 cdns->role = role; 39 mutex_unlock(&cdns->mutex); 40 41 if (!cdns->roles[role]) 42 return -ENXIO; 43 44 if (cdns->roles[role]->state == CDNS3_ROLE_STATE_ACTIVE) 45 return 0; 46 47 mutex_lock(&cdns->mutex); 48 ret = cdns->roles[role]->start(cdns); 49 if (!ret) 50 cdns->roles[role]->state = CDNS3_ROLE_STATE_ACTIVE; 51 mutex_unlock(&cdns->mutex); 52 53 return ret; 54 } 55 56 static void cdns3_role_stop(struct cdns3 *cdns) 57 { 58 enum usb_role role = cdns->role; 59 60 if (WARN_ON(role > USB_ROLE_DEVICE)) 61 return; 62 63 if (cdns->roles[role]->state == CDNS3_ROLE_STATE_INACTIVE) 64 return; 65 66 mutex_lock(&cdns->mutex); 67 cdns->roles[role]->stop(cdns); 68 cdns->roles[role]->state = CDNS3_ROLE_STATE_INACTIVE; 69 mutex_unlock(&cdns->mutex); 70 } 71 72 static void cdns3_exit_roles(struct cdns3 *cdns) 73 { 74 cdns3_role_stop(cdns); 75 cdns3_drd_exit(cdns); 76 } 77 78 /** 79 * cdns3_core_init_role - initialize role of operation 80 * @cdns: Pointer to cdns3 structure 81 * 82 * Returns 0 on success otherwise negative errno 83 */ 84 static int cdns3_core_init_role(struct cdns3 *cdns) 85 { 86 struct device *dev = cdns->dev; 87 enum usb_dr_mode best_dr_mode; 88 enum usb_dr_mode dr_mode; 89 int ret; 90 91 dr_mode = usb_get_dr_mode(dev); 92 cdns->role = USB_ROLE_NONE; 93 94 /* 95 * If driver can't read mode by means of usb_get_dr_mode function then 96 * chooses mode according with Kernel configuration. This setting 97 * can be restricted later depending on strap pin configuration. 98 */ 99 if (dr_mode == USB_DR_MODE_UNKNOWN) { 100 if (IS_ENABLED(CONFIG_USB_CDNS3_HOST) && 101 IS_ENABLED(CONFIG_USB_CDNS3_GADGET)) 102 dr_mode = USB_DR_MODE_OTG; 103 else if (IS_ENABLED(CONFIG_USB_CDNS3_HOST)) 104 dr_mode = USB_DR_MODE_HOST; 105 else if (IS_ENABLED(CONFIG_USB_CDNS3_GADGET)) 106 dr_mode = USB_DR_MODE_PERIPHERAL; 107 } 108 109 /* 110 * At this point cdns->dr_mode contains strap configuration. 111 * Driver try update this setting considering kernel configuration 112 */ 113 best_dr_mode = cdns->dr_mode; 114 115 ret = cdns3_idle_init(cdns); 116 if (ret) 117 return ret; 118 119 if (dr_mode == USB_DR_MODE_OTG) { 120 best_dr_mode = cdns->dr_mode; 121 } else if (cdns->dr_mode == USB_DR_MODE_OTG) { 122 best_dr_mode = dr_mode; 123 } else if (cdns->dr_mode != dr_mode) { 124 dev_err(dev, "Incorrect DRD configuration\n"); 125 return -EINVAL; 126 } 127 128 dr_mode = best_dr_mode; 129 130 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { 131 ret = cdns3_host_init(cdns); 132 if (ret) { 133 dev_err(dev, "Host initialization failed with %d\n", 134 ret); 135 goto err; 136 } 137 } 138 139 if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_PERIPHERAL) { 140 ret = cdns3_gadget_init(cdns); 141 if (ret) { 142 dev_err(dev, "Device initialization failed with %d\n", 143 ret); 144 goto err; 145 } 146 } 147 148 cdns->dr_mode = dr_mode; 149 150 ret = cdns3_drd_update_mode(cdns); 151 if (ret) 152 goto err; 153 154 /* Initialize idle role to start with */ 155 ret = cdns3_role_start(cdns, USB_ROLE_NONE); 156 if (ret) 157 goto err; 158 159 switch (cdns->dr_mode) { 160 case USB_DR_MODE_OTG: 161 ret = cdns3_hw_role_switch(cdns); 162 if (ret) 163 goto err; 164 break; 165 case USB_DR_MODE_PERIPHERAL: 166 ret = cdns3_role_start(cdns, USB_ROLE_DEVICE); 167 if (ret) 168 goto err; 169 break; 170 case USB_DR_MODE_HOST: 171 ret = cdns3_role_start(cdns, USB_ROLE_HOST); 172 if (ret) 173 goto err; 174 break; 175 default: 176 ret = -EINVAL; 177 goto err; 178 } 179 180 return 0; 181 err: 182 cdns3_exit_roles(cdns); 183 return ret; 184 } 185 186 /** 187 * cdns3_hw_role_state_machine - role switch state machine based on hw events. 188 * @cdns: Pointer to controller structure. 189 * 190 * Returns next role to be entered based on hw events. 191 */ 192 static enum usb_role cdns3_hw_role_state_machine(struct cdns3 *cdns) 193 { 194 enum usb_role role = USB_ROLE_NONE; 195 int id, vbus; 196 197 if (cdns->dr_mode != USB_DR_MODE_OTG) { 198 if (cdns3_is_host(cdns)) 199 role = USB_ROLE_HOST; 200 if (cdns3_is_device(cdns)) 201 role = USB_ROLE_DEVICE; 202 203 return role; 204 } 205 206 id = cdns3_get_id(cdns); 207 vbus = cdns3_get_vbus(cdns); 208 209 /* 210 * Role change state machine 211 * Inputs: ID, VBUS 212 * Previous state: cdns->role 213 * Next state: role 214 */ 215 role = cdns->role; 216 217 switch (role) { 218 case USB_ROLE_NONE: 219 /* 220 * Driver treats USB_ROLE_NONE synonymous to IDLE state from 221 * controller specification. 222 */ 223 if (!id) 224 role = USB_ROLE_HOST; 225 else if (vbus) 226 role = USB_ROLE_DEVICE; 227 break; 228 case USB_ROLE_HOST: /* from HOST, we can only change to NONE */ 229 if (id) 230 role = USB_ROLE_NONE; 231 break; 232 case USB_ROLE_DEVICE: /* from GADGET, we can only change to NONE*/ 233 if (!vbus) 234 role = USB_ROLE_NONE; 235 break; 236 } 237 238 dev_dbg(cdns->dev, "role %d -> %d\n", cdns->role, role); 239 240 return role; 241 } 242 243 static int cdns3_idle_role_start(struct cdns3 *cdns) 244 { 245 return 0; 246 } 247 248 static void cdns3_idle_role_stop(struct cdns3 *cdns) 249 { 250 /* Program Lane swap and bring PHY out of RESET */ 251 phy_reset(cdns->usb3_phy); 252 } 253 254 static int cdns3_idle_init(struct cdns3 *cdns) 255 { 256 struct cdns3_role_driver *rdrv; 257 258 rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL); 259 if (!rdrv) 260 return -ENOMEM; 261 262 rdrv->start = cdns3_idle_role_start; 263 rdrv->stop = cdns3_idle_role_stop; 264 rdrv->state = CDNS3_ROLE_STATE_INACTIVE; 265 rdrv->suspend = NULL; 266 rdrv->resume = NULL; 267 rdrv->name = "idle"; 268 269 cdns->roles[USB_ROLE_NONE] = rdrv; 270 271 return 0; 272 } 273 274 /** 275 * cdns3_hw_role_switch - switch roles based on HW state 276 * @cdns: controller 277 */ 278 int cdns3_hw_role_switch(struct cdns3 *cdns) 279 { 280 enum usb_role real_role, current_role; 281 int ret = 0; 282 283 /* Depends on role switch class */ 284 if (cdns->role_sw) 285 return 0; 286 287 pm_runtime_get_sync(cdns->dev); 288 289 current_role = cdns->role; 290 real_role = cdns3_hw_role_state_machine(cdns); 291 292 /* Do nothing if nothing changed */ 293 if (current_role == real_role) 294 goto exit; 295 296 cdns3_role_stop(cdns); 297 298 dev_dbg(cdns->dev, "Switching role %d -> %d", current_role, real_role); 299 300 ret = cdns3_role_start(cdns, real_role); 301 if (ret) { 302 /* Back to current role */ 303 dev_err(cdns->dev, "set %d has failed, back to %d\n", 304 real_role, current_role); 305 ret = cdns3_role_start(cdns, current_role); 306 if (ret) 307 dev_err(cdns->dev, "back to %d failed too\n", 308 current_role); 309 } 310 exit: 311 pm_runtime_put_sync(cdns->dev); 312 return ret; 313 } 314 315 /** 316 * cdsn3_role_get - get current role of controller. 317 * 318 * @sw: pointer to USB role switch structure 319 * 320 * Returns role 321 */ 322 static enum usb_role cdns3_role_get(struct usb_role_switch *sw) 323 { 324 struct cdns3 *cdns = usb_role_switch_get_drvdata(sw); 325 326 return cdns->role; 327 } 328 329 /** 330 * cdns3_role_set - set current role of controller. 331 * 332 * @sw: pointer to USB role switch structure 333 * @role: the previous role 334 * Handles below events: 335 * - Role switch for dual-role devices 336 * - USB_ROLE_GADGET <--> USB_ROLE_NONE for peripheral-only devices 337 */ 338 static int cdns3_role_set(struct usb_role_switch *sw, enum usb_role role) 339 { 340 struct cdns3 *cdns = usb_role_switch_get_drvdata(sw); 341 int ret = 0; 342 343 pm_runtime_get_sync(cdns->dev); 344 345 if (cdns->role == role) 346 goto pm_put; 347 348 if (cdns->dr_mode == USB_DR_MODE_HOST) { 349 switch (role) { 350 case USB_ROLE_NONE: 351 case USB_ROLE_HOST: 352 break; 353 default: 354 goto pm_put; 355 } 356 } 357 358 if (cdns->dr_mode == USB_DR_MODE_PERIPHERAL) { 359 switch (role) { 360 case USB_ROLE_NONE: 361 case USB_ROLE_DEVICE: 362 break; 363 default: 364 goto pm_put; 365 } 366 } 367 368 cdns3_role_stop(cdns); 369 ret = cdns3_role_start(cdns, role); 370 if (ret) 371 dev_err(cdns->dev, "set role %d has failed\n", role); 372 373 pm_put: 374 pm_runtime_put_sync(cdns->dev); 375 return ret; 376 } 377 378 static int set_phy_power_on(struct cdns3 *cdns) 379 { 380 int ret; 381 382 ret = phy_power_on(cdns->usb2_phy); 383 if (ret) 384 return ret; 385 386 ret = phy_power_on(cdns->usb3_phy); 387 if (ret) 388 phy_power_off(cdns->usb2_phy); 389 390 return ret; 391 } 392 393 static void set_phy_power_off(struct cdns3 *cdns) 394 { 395 phy_power_off(cdns->usb3_phy); 396 phy_power_off(cdns->usb2_phy); 397 } 398 399 /** 400 * cdns3_wakeup_irq - interrupt handler for wakeup events 401 * @irq: irq number for cdns3 core device 402 * @data: structure of cdns3 403 * 404 * Returns IRQ_HANDLED or IRQ_NONE 405 */ 406 static irqreturn_t cdns3_wakeup_irq(int irq, void *data) 407 { 408 struct cdns3 *cdns = data; 409 410 if (cdns->in_lpm) { 411 disable_irq_nosync(irq); 412 cdns->wakeup_pending = true; 413 if ((cdns->role == USB_ROLE_HOST) && cdns->host_dev) 414 pm_request_resume(&cdns->host_dev->dev); 415 416 return IRQ_HANDLED; 417 } 418 419 return IRQ_NONE; 420 } 421 422 /** 423 * cdns3_probe - probe for cdns3 core device 424 * @pdev: Pointer to cdns3 core platform device 425 * 426 * Returns 0 on success otherwise negative errno 427 */ 428 static int cdns3_probe(struct platform_device *pdev) 429 { 430 struct usb_role_switch_desc sw_desc = { }; 431 struct device *dev = &pdev->dev; 432 struct resource *res; 433 struct cdns3 *cdns; 434 void __iomem *regs; 435 int ret; 436 437 ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 438 if (ret) { 439 dev_err(dev, "error setting dma mask: %d\n", ret); 440 return ret; 441 } 442 443 cdns = devm_kzalloc(dev, sizeof(*cdns), GFP_KERNEL); 444 if (!cdns) 445 return -ENOMEM; 446 447 cdns->dev = dev; 448 cdns->pdata = dev_get_platdata(dev); 449 450 platform_set_drvdata(pdev, cdns); 451 452 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "host"); 453 if (!res) { 454 dev_err(dev, "missing host IRQ\n"); 455 return -ENODEV; 456 } 457 458 cdns->xhci_res[0] = *res; 459 460 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "xhci"); 461 if (!res) { 462 dev_err(dev, "couldn't get xhci resource\n"); 463 return -ENXIO; 464 } 465 466 cdns->xhci_res[1] = *res; 467 468 cdns->dev_irq = platform_get_irq_byname(pdev, "peripheral"); 469 if (cdns->dev_irq == -EPROBE_DEFER) 470 return cdns->dev_irq; 471 472 if (cdns->dev_irq < 0) 473 dev_err(dev, "couldn't get peripheral irq\n"); 474 475 regs = devm_platform_ioremap_resource_byname(pdev, "dev"); 476 if (IS_ERR(regs)) 477 return PTR_ERR(regs); 478 cdns->dev_regs = regs; 479 480 cdns->otg_irq = platform_get_irq_byname(pdev, "otg"); 481 if (cdns->otg_irq == -EPROBE_DEFER) 482 return cdns->otg_irq; 483 484 if (cdns->otg_irq < 0) { 485 dev_err(dev, "couldn't get otg irq\n"); 486 return cdns->otg_irq; 487 } 488 489 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "otg"); 490 if (!res) { 491 dev_err(dev, "couldn't get otg resource\n"); 492 return -ENXIO; 493 } 494 495 cdns->phyrst_a_enable = device_property_read_bool(dev, "cdns,phyrst-a-enable"); 496 497 cdns->otg_res = *res; 498 499 cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup"); 500 if (cdns->wakeup_irq == -EPROBE_DEFER) 501 return cdns->wakeup_irq; 502 else if (cdns->wakeup_irq == 0) 503 return -EINVAL; 504 505 if (cdns->wakeup_irq < 0) { 506 dev_dbg(dev, "couldn't get wakeup irq\n"); 507 cdns->wakeup_irq = 0x0; 508 } 509 510 mutex_init(&cdns->mutex); 511 512 cdns->usb2_phy = devm_phy_optional_get(dev, "cdns3,usb2-phy"); 513 if (IS_ERR(cdns->usb2_phy)) 514 return PTR_ERR(cdns->usb2_phy); 515 516 ret = phy_init(cdns->usb2_phy); 517 if (ret) 518 return ret; 519 520 cdns->usb3_phy = devm_phy_optional_get(dev, "cdns3,usb3-phy"); 521 if (IS_ERR(cdns->usb3_phy)) 522 return PTR_ERR(cdns->usb3_phy); 523 524 ret = phy_init(cdns->usb3_phy); 525 if (ret) 526 goto err1; 527 528 ret = set_phy_power_on(cdns); 529 if (ret) 530 goto err2; 531 532 sw_desc.set = cdns3_role_set; 533 sw_desc.get = cdns3_role_get; 534 sw_desc.allow_userspace_control = true; 535 sw_desc.driver_data = cdns; 536 if (device_property_read_bool(dev, "usb-role-switch")) 537 sw_desc.fwnode = dev->fwnode; 538 539 cdns->role_sw = usb_role_switch_register(dev, &sw_desc); 540 if (IS_ERR(cdns->role_sw)) { 541 ret = PTR_ERR(cdns->role_sw); 542 dev_warn(dev, "Unable to register Role Switch\n"); 543 goto err3; 544 } 545 546 if (cdns->wakeup_irq) { 547 ret = devm_request_irq(cdns->dev, cdns->wakeup_irq, 548 cdns3_wakeup_irq, 549 IRQF_SHARED, 550 dev_name(cdns->dev), cdns); 551 552 if (ret) { 553 dev_err(cdns->dev, "couldn't register wakeup irq handler\n"); 554 goto err3; 555 } 556 } 557 558 ret = cdns3_drd_init(cdns); 559 if (ret) 560 goto err4; 561 562 ret = cdns3_core_init_role(cdns); 563 if (ret) 564 goto err4; 565 566 spin_lock_init(&cdns->lock); 567 device_set_wakeup_capable(dev, true); 568 pm_runtime_set_active(dev); 569 pm_runtime_enable(dev); 570 pm_runtime_forbid(dev); 571 572 /* 573 * The controller needs less time between bus and controller suspend, 574 * and we also needs a small delay to avoid frequently entering low 575 * power mode. 576 */ 577 pm_runtime_set_autosuspend_delay(dev, 20); 578 pm_runtime_mark_last_busy(dev); 579 pm_runtime_use_autosuspend(dev); 580 dev_dbg(dev, "Cadence USB3 core: probe succeed\n"); 581 582 return 0; 583 err4: 584 cdns3_drd_exit(cdns); 585 usb_role_switch_unregister(cdns->role_sw); 586 err3: 587 set_phy_power_off(cdns); 588 err2: 589 phy_exit(cdns->usb3_phy); 590 err1: 591 phy_exit(cdns->usb2_phy); 592 593 return ret; 594 } 595 596 /** 597 * cdns3_remove - unbind drd driver and clean up 598 * @pdev: Pointer to Linux platform device 599 * 600 * Returns 0 on success otherwise negative errno 601 */ 602 static int cdns3_remove(struct platform_device *pdev) 603 { 604 struct cdns3 *cdns = platform_get_drvdata(pdev); 605 606 pm_runtime_get_sync(&pdev->dev); 607 pm_runtime_disable(&pdev->dev); 608 pm_runtime_put_noidle(&pdev->dev); 609 cdns3_exit_roles(cdns); 610 usb_role_switch_unregister(cdns->role_sw); 611 set_phy_power_off(cdns); 612 phy_exit(cdns->usb2_phy); 613 phy_exit(cdns->usb3_phy); 614 return 0; 615 } 616 617 #ifdef CONFIG_PM 618 619 static int cdns3_set_platform_suspend(struct device *dev, 620 bool suspend, bool wakeup) 621 { 622 struct cdns3 *cdns = dev_get_drvdata(dev); 623 int ret = 0; 624 625 if (cdns->pdata && cdns->pdata->platform_suspend) 626 ret = cdns->pdata->platform_suspend(dev, suspend, wakeup); 627 628 return ret; 629 } 630 631 static int cdns3_controller_suspend(struct device *dev, pm_message_t msg) 632 { 633 struct cdns3 *cdns = dev_get_drvdata(dev); 634 bool wakeup; 635 unsigned long flags; 636 637 if (cdns->in_lpm) 638 return 0; 639 640 if (PMSG_IS_AUTO(msg)) 641 wakeup = true; 642 else 643 wakeup = device_may_wakeup(dev); 644 645 cdns3_set_platform_suspend(cdns->dev, true, wakeup); 646 set_phy_power_off(cdns); 647 spin_lock_irqsave(&cdns->lock, flags); 648 cdns->in_lpm = true; 649 spin_unlock_irqrestore(&cdns->lock, flags); 650 dev_dbg(cdns->dev, "%s ends\n", __func__); 651 652 return 0; 653 } 654 655 static int cdns3_controller_resume(struct device *dev, pm_message_t msg) 656 { 657 struct cdns3 *cdns = dev_get_drvdata(dev); 658 int ret; 659 unsigned long flags; 660 661 if (!cdns->in_lpm) 662 return 0; 663 664 ret = set_phy_power_on(cdns); 665 if (ret) 666 return ret; 667 668 cdns3_set_platform_suspend(cdns->dev, false, false); 669 670 spin_lock_irqsave(&cdns->lock, flags); 671 if (cdns->roles[cdns->role]->resume && !PMSG_IS_AUTO(msg)) 672 cdns->roles[cdns->role]->resume(cdns, false); 673 674 cdns->in_lpm = false; 675 spin_unlock_irqrestore(&cdns->lock, flags); 676 if (cdns->wakeup_pending) { 677 cdns->wakeup_pending = false; 678 enable_irq(cdns->wakeup_irq); 679 } 680 dev_dbg(cdns->dev, "%s ends\n", __func__); 681 682 return ret; 683 } 684 685 static int cdns3_runtime_suspend(struct device *dev) 686 { 687 return cdns3_controller_suspend(dev, PMSG_AUTO_SUSPEND); 688 } 689 690 static int cdns3_runtime_resume(struct device *dev) 691 { 692 return cdns3_controller_resume(dev, PMSG_AUTO_RESUME); 693 } 694 #ifdef CONFIG_PM_SLEEP 695 696 static int cdns3_suspend(struct device *dev) 697 { 698 struct cdns3 *cdns = dev_get_drvdata(dev); 699 unsigned long flags; 700 701 if (pm_runtime_status_suspended(dev)) 702 pm_runtime_resume(dev); 703 704 if (cdns->roles[cdns->role]->suspend) { 705 spin_lock_irqsave(&cdns->lock, flags); 706 cdns->roles[cdns->role]->suspend(cdns, false); 707 spin_unlock_irqrestore(&cdns->lock, flags); 708 } 709 710 return cdns3_controller_suspend(dev, PMSG_SUSPEND); 711 } 712 713 static int cdns3_resume(struct device *dev) 714 { 715 int ret; 716 717 ret = cdns3_controller_resume(dev, PMSG_RESUME); 718 if (ret) 719 return ret; 720 721 pm_runtime_disable(dev); 722 pm_runtime_set_active(dev); 723 pm_runtime_enable(dev); 724 725 return ret; 726 } 727 #endif /* CONFIG_PM_SLEEP */ 728 #endif /* CONFIG_PM */ 729 730 static const struct dev_pm_ops cdns3_pm_ops = { 731 SET_SYSTEM_SLEEP_PM_OPS(cdns3_suspend, cdns3_resume) 732 SET_RUNTIME_PM_OPS(cdns3_runtime_suspend, cdns3_runtime_resume, NULL) 733 }; 734 735 #ifdef CONFIG_OF 736 static const struct of_device_id of_cdns3_match[] = { 737 { .compatible = "cdns,usb3" }, 738 { }, 739 }; 740 MODULE_DEVICE_TABLE(of, of_cdns3_match); 741 #endif 742 743 static struct platform_driver cdns3_driver = { 744 .probe = cdns3_probe, 745 .remove = cdns3_remove, 746 .driver = { 747 .name = "cdns-usb3", 748 .of_match_table = of_match_ptr(of_cdns3_match), 749 .pm = &cdns3_pm_ops, 750 }, 751 }; 752 753 module_platform_driver(cdns3_driver); 754 755 MODULE_ALIAS("platform:cdns3"); 756 MODULE_AUTHOR("Pawel Laszczak <pawell@cadence.com>"); 757 MODULE_LICENSE("GPL v2"); 758 MODULE_DESCRIPTION("Cadence USB3 DRD Controller Driver"); 759