drivers/usb/dwc3/core.c

   1 /**
   2  * core.c - DesignWare USB3 DRD Controller Core 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  * This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2  of
  11  * the License as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include <linux/version.h>
  23 #include <linux/module.h>
  24 #include <linux/kernel.h>
  25 #include <linux/slab.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/platform_device.h>
  28 #include <linux/pm_runtime.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/ioport.h>
  31 #include <linux/io.h>
  32 #include <linux/list.h>
  33 #include <linux/delay.h>
  34 #include <linux/dma-mapping.h>
  35 #include <linux/of.h>
  36 #include <linux/acpi.h>
  37 #include <linux/pinctrl/consumer.h>
  38
  39 #include <linux/usb/ch9.h>
  40 #include <linux/usb/gadget.h>
  41 #include <linux/usb/of.h>
  42 #include <linux/usb/otg.h>
  43
  44 #include "platform_data.h"
  45 #include "core.h"
  46 #include "gadget.h"
  47 #include "io.h"
  48
  49 #include "debug.h"
  50
  51 /* -------------------------------------------------------------------------- */
  52
  53 void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
  54 {
  55         u32 reg;
  56
  57         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
  58         reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
  59         reg |= DWC3_GCTL_PRTCAPDIR(mode);
  60         dwc3_writel(dwc->regs, DWC3_GCTL, reg);
  61 }
  62
  63 u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type)
  64 {
  65         struct dwc3             *dwc = dep->dwc;
  66         u32                     reg;
  67
  68         dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE,
  69                         DWC3_GDBGFIFOSPACE_NUM(dep->number) |
  70                         DWC3_GDBGFIFOSPACE_TYPE(type));
  71
  72         reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE);
  73
  74         return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg);
  75 }
  76
  77 /**
  78  * dwc3_core_soft_reset - Issues core soft reset and PHY reset
  79  * @dwc: pointer to our context structure
  80  */
  81 static int dwc3_core_soft_reset(struct dwc3 *dwc)
  82 {
  83         u32             reg;
  84         int             retries = 1000;
  85         int             ret;
  86
  87         usb_phy_init(dwc->usb2_phy);
  88         usb_phy_init(dwc->usb3_phy);
  89         ret = phy_init(dwc->usb2_generic_phy);
  90         if (ret < 0)
  91                 return ret;
  92
  93         ret = phy_init(dwc->usb3_generic_phy);
  94         if (ret < 0) {
  95                 phy_exit(dwc->usb2_generic_phy);
  96                 return ret;
  97         }
  98
  99         /*
 100          * We're resetting only the device side because, if we're in host mode,
 101          * XHCI driver will reset the host block. If dwc3 was configured for
 102          * host-only mode, then we can return early.
 103          */
 104         if (dwc->dr_mode == USB_DR_MODE_HOST)
 105                 return 0;
 106
 107         reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 108         reg |= DWC3_DCTL_CSFTRST;
 109         dwc3_writel(dwc->regs, DWC3_DCTL, reg);
 110
 111         do {
 112                 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 113                 if (!(reg & DWC3_DCTL_CSFTRST))
 114                         return 0;
 115
 116                 udelay(1);
 117         } while (--retries);
 118
 119         return -ETIMEDOUT;
 120 }
 121
 122 /**
 123  * dwc3_soft_reset - Issue soft reset
 124  * @dwc: Pointer to our controller context structure
 125  */
 126 static int dwc3_soft_reset(struct dwc3 *dwc)
 127 {
 128         unsigned long timeout;
 129         u32 reg;
 130
 131         timeout = jiffies + msecs_to_jiffies(500);
 132         dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST);
 133         do {
 134                 reg = dwc3_readl(dwc->regs, DWC3_DCTL);
 135                 if (!(reg & DWC3_DCTL_CSFTRST))
 136                         break;
 137
 138                 if (time_after(jiffies, timeout)) {
 139                         dev_err(dwc->dev, "Reset Timed Out\n");
 140                         return -ETIMEDOUT;
 141                 }
 142
 143                 cpu_relax();
 144         } while (true);
 145
 146         return 0;
 147 }
 148
 149 /*
 150  * dwc3_frame_length_adjustment - Adjusts frame length if required
 151  * @dwc3: Pointer to our controller context structure
 152  */
 153 static void dwc3_frame_length_adjustment(struct dwc3 *dwc)
 154 {
 155         u32 reg;
 156         u32 dft;
 157
 158         if (dwc->revision < DWC3_REVISION_250A)
 159                 return;
 160
 161         if (dwc->fladj == 0)
 162                 return;
 163
 164         reg = dwc3_readl(dwc->regs, DWC3_GFLADJ);
 165         dft = reg & DWC3_GFLADJ_30MHZ_MASK;
 166         if (!dev_WARN_ONCE(dwc->dev, dft == dwc->fladj,
 167             "request value same as default, ignoring\n")) {
 168                 reg &= ~DWC3_GFLADJ_30MHZ_MASK;
 169                 reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | dwc->fladj;
 170                 dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
 171         }
 172 }
 173
 174 /**
 175  * dwc3_free_one_event_buffer - Frees one event buffer
 176  * @dwc: Pointer to our controller context structure
 177  * @evt: Pointer to event buffer to be freed
 178  */
 179 static void dwc3_free_one_event_buffer(struct dwc3 *dwc,
 180                 struct dwc3_event_buffer *evt)
 181 {
 182         dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma);
 183 }
 184
 185 /**
 186  * dwc3_alloc_one_event_buffer - Allocates one event buffer structure
 187  * @dwc: Pointer to our controller context structure
 188  * @length: size of the event buffer
 189  *
 190  * Returns a pointer to the allocated event buffer structure on success
 191  * otherwise ERR_PTR(errno).
 192  */
 193 static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc,
 194                 unsigned length)
 195 {
 196         struct dwc3_event_buffer        *evt;
 197
 198         evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL);
 199         if (!evt)
 200                 return ERR_PTR(-ENOMEM);
 201
 202         evt->dwc        = dwc;
 203         evt->length     = length;
 204         evt->buf        = dma_alloc_coherent(dwc->dev, length,
 205                         &evt->dma, GFP_KERNEL);
 206         if (!evt->buf)
 207                 return ERR_PTR(-ENOMEM);
 208
 209         return evt;
 210 }
 211
 212 /**
 213  * dwc3_free_event_buffers - frees all allocated event buffers
 214  * @dwc: Pointer to our controller context structure
 215  */
 216 static void dwc3_free_event_buffers(struct dwc3 *dwc)
 217 {
 218         struct dwc3_event_buffer        *evt;
 219
 220         evt = dwc->ev_buf;
 221         if (evt)
 222                 dwc3_free_one_event_buffer(dwc, evt);
 223 }
 224
 225 /**
 226  * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
 227  * @dwc: pointer to our controller context structure
 228  * @length: size of event buffer
 229  *
 230  * Returns 0 on success otherwise negative errno. In the error case, dwc
 231  * may contain some buffers allocated but not all which were requested.
 232  */
 233 static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
 234 {
 235         struct dwc3_event_buffer *evt;
 236
 237         evt = dwc3_alloc_one_event_buffer(dwc, length);
 238         if (IS_ERR(evt)) {
 239                 dev_err(dwc->dev, "can't allocate event buffer\n");
 240                 return PTR_ERR(evt);
 241         }
 242         dwc->ev_buf = evt;
 243
 244         return 0;
 245 }
 246
 247 /**
 248  * dwc3_event_buffers_setup - setup our allocated event buffers
 249  * @dwc: pointer to our controller context structure
 250  *
 251  * Returns 0 on success otherwise negative errno.
 252  */
 253 static int dwc3_event_buffers_setup(struct dwc3 *dwc)
 254 {
 255         struct dwc3_event_buffer        *evt;
 256
 257         evt = dwc->ev_buf;
 258         dwc3_trace(trace_dwc3_core,
 259                         "Event buf %p dma %08llx length %d\n",
 260                         evt->buf, (unsigned long long) evt->dma,
 261                         evt->length);
 262
 263         evt->lpos = 0;
 264
 265         dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0),
 266                         lower_32_bits(evt->dma));
 267         dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0),
 268                         upper_32_bits(evt->dma));
 269         dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0),
 270                         DWC3_GEVNTSIZ_SIZE(evt->length));
 271         dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
 272
 273         return 0;
 274 }
 275
 276 static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
 277 {
 278         struct dwc3_event_buffer        *evt;
 279
 280         evt = dwc->ev_buf;
 281
 282         evt->lpos = 0;
 283
 284         dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 0);
 285         dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0);
 286         dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK
 287                         | DWC3_GEVNTSIZ_SIZE(0));
 288         dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0);
 289 }
 290
 291 static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc)
 292 {
 293         if (!dwc->has_hibernation)
 294                 return 0;
 295
 296         if (!dwc->nr_scratch)
 297                 return 0;
 298
 299         dwc->scratchbuf = kmalloc_array(dwc->nr_scratch,
 300                         DWC3_SCRATCHBUF_SIZE, GFP_KERNEL);
 301         if (!dwc->scratchbuf)
 302                 return -ENOMEM;
 303
 304         return 0;
 305 }
 306
 307 static int dwc3_setup_scratch_buffers(struct dwc3 *dwc)
 308 {
 309         dma_addr_t scratch_addr;
 310         u32 param;
 311         int ret;
 312
 313         if (!dwc->has_hibernation)
 314                 return 0;
 315
 316         if (!dwc->nr_scratch)
 317                 return 0;
 318
 319          /* should never fall here */
 320         if (!WARN_ON(dwc->scratchbuf))
 321                 return 0;
 322
 323         scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf,
 324                         dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE,
 325                         DMA_BIDIRECTIONAL);
 326         if (dma_mapping_error(dwc->dev, scratch_addr)) {
 327                 dev_err(dwc->dev, "failed to map scratch buffer\n");
 328                 ret = -EFAULT;
 329                 goto err0;
 330         }
 331
 332         dwc->scratch_addr = scratch_addr;
 333
 334         param = lower_32_bits(scratch_addr);
 335
 336         ret = dwc3_send_gadget_generic_command(dwc,
 337                         DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param);
 338         if (ret < 0)
 339                 goto err1;
 340
 341         param = upper_32_bits(scratch_addr);
 342
 343         ret = dwc3_send_gadget_generic_command(dwc,
 344                         DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param);
 345         if (ret < 0)
 346                 goto err1;
 347
 348         return 0;
 349
 350 err1:
 351         dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
 352                         DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
 353
 354 err0:
 355         return ret;
 356 }
 357
 358 static void dwc3_free_scratch_buffers(struct dwc3 *dwc)
 359 {
 360         if (!dwc->has_hibernation)
 361                 return;
 362
 363         if (!dwc->nr_scratch)
 364                 return;
 365
 366          /* should never fall here */
 367         if (!WARN_ON(dwc->scratchbuf))
 368                 return;
 369
 370         dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch *
 371                         DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL);
 372         kfree(dwc->scratchbuf);
 373 }
 374
 375 static void dwc3_core_num_eps(struct dwc3 *dwc)
 376 {
 377         struct dwc3_hwparams    *parms = &dwc->hwparams;
 378
 379         dwc->num_in_eps = DWC3_NUM_IN_EPS(parms);
 380         dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps;
 381
 382         dwc3_trace(trace_dwc3_core, "found %d IN and %d OUT endpoints",
 383                         dwc->num_in_eps, dwc->num_out_eps);
 384 }
 385
 386 static void dwc3_cache_hwparams(struct dwc3 *dwc)
 387 {
 388         struct dwc3_hwparams    *parms = &dwc->hwparams;
 389
 390         parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0);
 391         parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1);
 392         parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2);
 393         parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3);
 394         parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4);
 395         parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5);
 396         parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6);
 397         parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7);
 398         parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8);
 399 }
 400
 401 /**
 402  * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core
 403  * @dwc: Pointer to our controller context structure
 404  *
 405  * Returns 0 on success. The USB PHY interfaces are configured but not
 406  * initialized. The PHY interfaces and the PHYs get initialized together with
 407  * the core in dwc3_core_init.
 408  */
 409 static int dwc3_phy_setup(struct dwc3 *dwc)
 410 {
 411         u32 reg;
 412         int ret;
 413
 414         reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
 415
 416         /*
 417          * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY
 418          * to '0' during coreConsultant configuration. So default value
 419          * will be '0' when the core is reset. Application needs to set it
 420          * to '1' after the core initialization is completed.
 421          */
 422         if (dwc->revision > DWC3_REVISION_194A)
 423                 reg |= DWC3_GUSB3PIPECTL_SUSPHY;
 424
 425         if (dwc->u2ss_inp3_quirk)
 426                 reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK;
 427
 428         if (dwc->dis_rxdet_inp3_quirk)
 429                 reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3;
 430
 431         if (dwc->req_p1p2p3_quirk)
 432                 reg |= DWC3_GUSB3PIPECTL_REQP1P2P3;
 433
 434         if (dwc->del_p1p2p3_quirk)
 435                 reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN;
 436
 437         if (dwc->del_phy_power_chg_quirk)
 438                 reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE;
 439
 440         if (dwc->lfps_filter_quirk)
 441                 reg |= DWC3_GUSB3PIPECTL_LFPSFILT;
 442
 443         if (dwc->rx_detect_poll_quirk)
 444                 reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL;
 445
 446         if (dwc->tx_de_emphasis_quirk)
 447                 reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis);
 448
 449         if (dwc->dis_u3_susphy_quirk)
 450                 reg &= ~DWC3_GUSB3PIPECTL_SUSPHY;
 451
 452         dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
 453
 454         reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
 455
 456         /* Select the HS PHY interface */
 457         switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) {
 458         case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI:
 459                 if (dwc->hsphy_interface &&
 460                                 !strncmp(dwc->hsphy_interface, "utmi", 4)) {
 461                         reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI;
 462                         break;
 463                 } else if (dwc->hsphy_interface &&
 464                                 !strncmp(dwc->hsphy_interface, "ulpi", 4)) {
 465                         reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
 466                         dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
 467                 } else {
 468                         /* Relying on default value. */
 469                         if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
 470                                 break;
 471                 }
 472                 /* FALLTHROUGH */
 473         case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
 474                 /* Making sure the interface and PHY are operational */
 475                 ret = dwc3_soft_reset(dwc);
 476                 if (ret)
 477                         return ret;
 478
 479                 udelay(1);
 480
 481                 ret = dwc3_ulpi_init(dwc);
 482                 if (ret)
 483                         return ret;
 484                 /* FALLTHROUGH */
 485         default:
 486                 break;
 487         }
 488
 489         /*
 490          * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to
 491          * '0' during coreConsultant configuration. So default value will
 492          * be '0' when the core is reset. Application needs to set it to
 493          * '1' after the core initialization is completed.
 494          */
 495         if (dwc->revision > DWC3_REVISION_194A)
 496                 reg |= DWC3_GUSB2PHYCFG_SUSPHY;
 497
 498         if (dwc->dis_u2_susphy_quirk)
 499                 reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
 500
 501         if (dwc->dis_enblslpm_quirk)
 502                 reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
 503
 504         dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
 505
 506         return 0;
 507 }
 508
 509 static void dwc3_core_exit(struct dwc3 *dwc)
 510 {
 511         dwc3_event_buffers_cleanup(dwc);
 512
 513         usb_phy_shutdown(dwc->usb2_phy);
 514         usb_phy_shutdown(dwc->usb3_phy);
 515         phy_exit(dwc->usb2_generic_phy);
 516         phy_exit(dwc->usb3_generic_phy);
 517
 518         usb_phy_set_suspend(dwc->usb2_phy, 1);
 519         usb_phy_set_suspend(dwc->usb3_phy, 1);
 520         phy_power_off(dwc->usb2_generic_phy);
 521         phy_power_off(dwc->usb3_generic_phy);
 522 }
 523
 524 /**
 525  * dwc3_core_init - Low-level initialization of DWC3 Core
 526  * @dwc: Pointer to our controller context structure
 527  *
 528  * Returns 0 on success otherwise negative errno.
 529  */
 530 static int dwc3_core_init(struct dwc3 *dwc)
 531 {
 532         u32                     hwparams4 = dwc->hwparams.hwparams4;
 533         u32                     reg;
 534         int                     ret;
 535
 536         reg = dwc3_readl(dwc->regs, DWC3_GSNPSID);
 537         /* This should read as U3 followed by revision number */
 538         if ((reg & DWC3_GSNPSID_MASK) == 0x55330000) {
 539                 /* Detected DWC_usb3 IP */
 540                 dwc->revision = reg;
 541         } else if ((reg & DWC3_GSNPSID_MASK) == 0x33310000) {
 542                 /* Detected DWC_usb31 IP */
 543                 dwc->revision = dwc3_readl(dwc->regs, DWC3_VER_NUMBER);
 544                 dwc->revision |= DWC3_REVISION_IS_DWC31;
 545         } else {
 546                 dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n");
 547                 ret = -ENODEV;
 548                 goto err0;
 549         }
 550
 551         /*
 552          * Write Linux Version Code to our GUID register so it's easy to figure
 553          * out which kernel version a bug was found.
 554          */
 555         dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE);
 556
 557         /* Handle USB2.0-only core configuration */
 558         if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
 559                         DWC3_GHWPARAMS3_SSPHY_IFC_DIS) {
 560                 if (dwc->maximum_speed == USB_SPEED_SUPER)
 561                         dwc->maximum_speed = USB_SPEED_HIGH;
 562         }
 563
 564         /* issue device SoftReset too */
 565         ret = dwc3_soft_reset(dwc);
 566         if (ret)
 567                 goto err0;
 568
 569         ret = dwc3_core_soft_reset(dwc);
 570         if (ret)
 571                 goto err0;
 572
 573         ret = dwc3_phy_setup(dwc);
 574         if (ret)
 575                 goto err0;
 576
 577         reg = dwc3_readl(dwc->regs, DWC3_GCTL);
 578         reg &= ~DWC3_GCTL_SCALEDOWN_MASK;
 579
 580         switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
 581         case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
 582                 /**
 583                  * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an
 584                  * issue which would cause xHCI compliance tests to fail.
 585                  *
 586                  * Because of that we cannot enable clock gating on such
 587                  * configurations.
 588                  *
 589                  * Refers to:
 590                  *
 591                  * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based
 592                  * SOF/ITP Mode Used
 593                  */
 594                 if ((dwc->dr_mode == USB_DR_MODE_HOST ||
 595                                 dwc->dr_mode == USB_DR_MODE_OTG) &&
 596                                 (dwc->revision >= DWC3_REVISION_210A &&
 597                                 dwc->revision <= DWC3_REVISION_250A))
 598                         reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC;
 599                 else
 600                         reg &= ~DWC3_GCTL_DSBLCLKGTNG;
 601                 break;
 602         case DWC3_GHWPARAMS1_EN_PWROPT_HIB:
 603                 /* enable hibernation here */
 604                 dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4);
 605
 606                 /*
 607                  * REVISIT Enabling this bit so that host-mode hibernation
 608                  * will work. Device-mode hibernation is not yet implemented.
 609                  */
 610                 reg |= DWC3_GCTL_GBLHIBERNATIONEN;
 611                 break;
 612         default:
 613                 dwc3_trace(trace_dwc3_core, "No power optimization available\n");
 614         }
 615
 616         /* check if current dwc3 is on simulation board */
 617         if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) {
 618                 dwc3_trace(trace_dwc3_core,
 619                                 "running on FPGA platform\n");
 620                 dwc->is_fpga = true;
 621         }
 622
 623         WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga,
 624                         "disable_scramble cannot be used on non-FPGA builds\n");
 625
 626         if (dwc->disable_scramble_quirk && dwc->is_fpga)
 627                 reg |= DWC3_GCTL_DISSCRAMBLE;
 628         else
 629                 reg &= ~DWC3_GCTL_DISSCRAMBLE;
 630
 631         if (dwc->u2exit_lfps_quirk)
 632                 reg |= DWC3_GCTL_U2EXIT_LFPS;
 633
 634         /*
 635          * WORKAROUND: DWC3 revisions <1.90a have a bug
 636          * where the device can fail to connect at SuperSpeed
 637          * and falls back to high-speed mode which causes
 638          * the device to enter a Connect/Disconnect loop
 639          */
 640         if (dwc->revision < DWC3_REVISION_190A)
 641                 reg |= DWC3_GCTL_U2RSTECN;
 642
 643         dwc3_writel(dwc->regs, DWC3_GCTL, reg);
 644
 645         dwc3_core_num_eps(dwc);
 646
 647         ret = dwc3_setup_scratch_buffers(dwc);
 648         if (ret)
 649                 goto err1;
 650
 651         /* Adjust Frame Length */
 652         dwc3_frame_length_adjustment(dwc);
 653
 654         usb_phy_set_suspend(dwc->usb2_phy, 0);
 655         usb_phy_set_suspend(dwc->usb3_phy, 0);
 656         ret = phy_power_on(dwc->usb2_generic_phy);
 657         if (ret < 0)
 658                 goto err2;
 659
 660         ret = phy_power_on(dwc->usb3_generic_phy);
 661         if (ret < 0)
 662                 goto err3;
 663
 664         ret = dwc3_event_buffers_setup(dwc);
 665         if (ret) {
 666                 dev_err(dwc->dev, "failed to setup event buffers\n");
 667                 goto err4;
 668         }
 669
 670         return 0;
 671
 672 err4:
 673         phy_power_off(dwc->usb2_generic_phy);
 674
 675 err3:
 676         phy_power_off(dwc->usb3_generic_phy);
 677
 678 err2:
 679         usb_phy_set_suspend(dwc->usb2_phy, 1);
 680         usb_phy_set_suspend(dwc->usb3_phy, 1);
 681         dwc3_core_exit(dwc);
 682
 683 err1:
 684         usb_phy_shutdown(dwc->usb2_phy);
 685         usb_phy_shutdown(dwc->usb3_phy);
 686         phy_exit(dwc->usb2_generic_phy);
 687         phy_exit(dwc->usb3_generic_phy);
 688
 689 err0:
 690         return ret;
 691 }
 692
 693 static int dwc3_core_get_phy(struct dwc3 *dwc)
 694 {
 695         struct device           *dev = dwc->dev;
 696         struct device_node      *node = dev->of_node;
 697         int ret;
 698
 699         if (node) {
 700                 dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
 701                 dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
 702         } else {
 703                 dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 704                 dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
 705         }
 706
 707         if (IS_ERR(dwc->usb2_phy)) {
 708                 ret = PTR_ERR(dwc->usb2_phy);
 709                 if (ret == -ENXIO || ret == -ENODEV) {
 710                         dwc->usb2_phy = NULL;
 711                 } else if (ret == -EPROBE_DEFER) {
 712                         return ret;
 713                 } else {
 714                         dev_err(dev, "no usb2 phy configured\n");
 715                         return ret;
 716                 }
 717         }
 718
 719         if (IS_ERR(dwc->usb3_phy)) {
 720                 ret = PTR_ERR(dwc->usb3_phy);
 721                 if (ret == -ENXIO || ret == -ENODEV) {
 722                         dwc->usb3_phy = NULL;
 723                 } else if (ret == -EPROBE_DEFER) {
 724                         return ret;
 725                 } else {
 726                         dev_err(dev, "no usb3 phy configured\n");
 727                         return ret;
 728                 }
 729         }
 730
 731         dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
 732         if (IS_ERR(dwc->usb2_generic_phy)) {
 733                 ret = PTR_ERR(dwc->usb2_generic_phy);
 734                 if (ret == -ENOSYS || ret == -ENODEV) {
 735                         dwc->usb2_generic_phy = NULL;
 736                 } else if (ret == -EPROBE_DEFER) {
 737                         return ret;
 738                 } else {
 739                         dev_err(dev, "no usb2 phy configured\n");
 740                         return ret;
 741                 }
 742         }
 743
 744         dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
 745         if (IS_ERR(dwc->usb3_generic_phy)) {
 746                 ret = PTR_ERR(dwc->usb3_generic_phy);
 747                 if (ret == -ENOSYS || ret == -ENODEV) {
 748                         dwc->usb3_generic_phy = NULL;
 749                 } else if (ret == -EPROBE_DEFER) {
 750                         return ret;
 751                 } else {
 752                         dev_err(dev, "no usb3 phy configured\n");
 753                         return ret;
 754                 }
 755         }
 756
 757         return 0;
 758 }
 759
 760 static int dwc3_core_init_mode(struct dwc3 *dwc)
 761 {
 762         struct device *dev = dwc->dev;
 763         int ret;
 764
 765         switch (dwc->dr_mode) {
 766         case USB_DR_MODE_PERIPHERAL:
 767                 dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
 768                 ret = dwc3_gadget_init(dwc);
 769                 if (ret) {
 770                         dev_err(dev, "failed to initialize gadget\n");
 771                         return ret;
 772                 }
 773                 break;
 774         case USB_DR_MODE_HOST:
 775                 dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
 776                 ret = dwc3_host_init(dwc);
 777                 if (ret) {
 778                         dev_err(dev, "failed to initialize host\n");
 779                         return ret;
 780                 }
 781                 break;
 782         case USB_DR_MODE_OTG:
 783                 dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
 784                 ret = dwc3_host_init(dwc);
 785                 if (ret) {
 786                         dev_err(dev, "failed to initialize host\n");
 787                         return ret;
 788                 }
 789
 790                 ret = dwc3_gadget_init(dwc);
 791                 if (ret) {
 792                         dev_err(dev, "failed to initialize gadget\n");
 793                         return ret;
 794                 }
 795                 break;
 796         default:
 797                 dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode);
 798                 return -EINVAL;
 799         }
 800
 801         return 0;
 802 }
 803
 804 static void dwc3_core_exit_mode(struct dwc3 *dwc)
 805 {
 806         switch (dwc->dr_mode) {
 807         case USB_DR_MODE_PERIPHERAL:
 808                 dwc3_gadget_exit(dwc);
 809                 break;
 810         case USB_DR_MODE_HOST:
 811                 dwc3_host_exit(dwc);
 812                 break;
 813         case USB_DR_MODE_OTG:
 814                 dwc3_host_exit(dwc);
 815                 dwc3_gadget_exit(dwc);
 816                 break;
 817         default:
 818                 /* do nothing */
 819                 break;
 820         }
 821 }
 822
 823 #define DWC3_ALIGN_MASK         (16 - 1)
 824
 825 static int dwc3_probe(struct platform_device *pdev)
 826 {
 827         struct device           *dev = &pdev->dev;
 828         struct dwc3_platform_data *pdata = dev_get_platdata(dev);
 829         struct resource         *res;
 830         struct dwc3             *dwc;
 831         u8                      lpm_nyet_threshold;
 832         u8                      tx_de_emphasis;
 833         u8                      hird_threshold;
 834
 835         int                     ret;
 836
 837         void __iomem            *regs;
 838         void                    *mem;
 839
 840         mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
 841         if (!mem)
 842                 return -ENOMEM;
 843
 844         dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1);
 845         dwc->mem = mem;
 846         dwc->dev = dev;
 847
 848         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 849         if (!res) {
 850                 dev_err(dev, "missing IRQ\n");
 851                 return -ENODEV;
 852         }
 853         dwc->xhci_resources[1].start = res->start;
 854         dwc->xhci_resources[1].end = res->end;
 855         dwc->xhci_resources[1].flags = res->flags;
 856         dwc->xhci_resources[1].name = res->name;
 857
 858         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 859         if (!res) {
 860                 dev_err(dev, "missing memory resource\n");
 861                 return -ENODEV;
 862         }
 863
 864         dwc->xhci_resources[0].start = res->start;
 865         dwc->xhci_resources[0].end = dwc->xhci_resources[0].start +
 866                                         DWC3_XHCI_REGS_END;
 867         dwc->xhci_resources[0].flags = res->flags;
 868         dwc->xhci_resources[0].name = res->name;
 869
 870         res->start += DWC3_GLOBALS_REGS_START;
 871
 872         /*
 873          * Request memory region but exclude xHCI regs,
 874          * since it will be requested by the xhci-plat driver.
 875          */
 876         regs = devm_ioremap_resource(dev, res);
 877         if (IS_ERR(regs)) {
 878                 ret = PTR_ERR(regs);
 879                 goto err0;
 880         }
 881
 882         dwc->regs       = regs;
 883         dwc->regs_size  = resource_size(res);
 884
 885         /* default to highest possible threshold */
 886         lpm_nyet_threshold = 0xff;
 887
 888         /* default to -3.5dB de-emphasis */
 889         tx_de_emphasis = 1;
 890
 891         /*
 892          * default to assert utmi_sleep_n and use maximum allowed HIRD
 893          * threshold value of 0b1100
 894          */
 895         hird_threshold = 12;
 896
 897         dwc->maximum_speed = usb_get_maximum_speed(dev);
 898         dwc->dr_mode = usb_get_dr_mode(dev);
 899
 900         dwc->has_lpm_erratum = device_property_read_bool(dev,
 901                                 "snps,has-lpm-erratum");
 902         device_property_read_u8(dev, "snps,lpm-nyet-threshold",
 903                                 &lpm_nyet_threshold);
 904         dwc->is_utmi_l1_suspend = device_property_read_bool(dev,
 905                                 "snps,is-utmi-l1-suspend");
 906         device_property_read_u8(dev, "snps,hird-threshold",
 907                                 &hird_threshold);
 908         dwc->usb3_lpm_capable = device_property_read_bool(dev,
 909                                 "snps,usb3_lpm_capable");
 910
 911         dwc->disable_scramble_quirk = device_property_read_bool(dev,
 912                                 "snps,disable_scramble_quirk");
 913         dwc->u2exit_lfps_quirk = device_property_read_bool(dev,
 914                                 "snps,u2exit_lfps_quirk");
 915         dwc->u2ss_inp3_quirk = device_property_read_bool(dev,
 916                                 "snps,u2ss_inp3_quirk");
 917         dwc->req_p1p2p3_quirk = device_property_read_bool(dev,
 918                                 "snps,req_p1p2p3_quirk");
 919         dwc->del_p1p2p3_quirk = device_property_read_bool(dev,
 920                                 "snps,del_p1p2p3_quirk");
 921         dwc->del_phy_power_chg_quirk = device_property_read_bool(dev,
 922                                 "snps,del_phy_power_chg_quirk");
 923         dwc->lfps_filter_quirk = device_property_read_bool(dev,
 924                                 "snps,lfps_filter_quirk");
 925         dwc->rx_detect_poll_quirk = device_property_read_bool(dev,
 926                                 "snps,rx_detect_poll_quirk");
 927         dwc->dis_u3_susphy_quirk = device_property_read_bool(dev,
 928                                 "snps,dis_u3_susphy_quirk");
 929         dwc->dis_u2_susphy_quirk = device_property_read_bool(dev,
 930                                 "snps,dis_u2_susphy_quirk");
 931         dwc->dis_enblslpm_quirk = device_property_read_bool(dev,
 932                                 "snps,dis_enblslpm_quirk");
 933         dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev,
 934                                 "snps,dis_rxdet_inp3_quirk");
 935
 936         dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
 937                                 "snps,tx_de_emphasis_quirk");
 938         device_property_read_u8(dev, "snps,tx_de_emphasis",
 939                                 &tx_de_emphasis);
 940         device_property_read_string(dev, "snps,hsphy_interface",
 941                                     &dwc->hsphy_interface);
 942         device_property_read_u32(dev, "snps,quirk-frame-length-adjustment",
 943                                  &dwc->fladj);
 944
 945         if (pdata) {
 946                 dwc->maximum_speed = pdata->maximum_speed;
 947                 dwc->has_lpm_erratum = pdata->has_lpm_erratum;
 948                 if (pdata->lpm_nyet_threshold)
 949                         lpm_nyet_threshold = pdata->lpm_nyet_threshold;
 950                 dwc->is_utmi_l1_suspend = pdata->is_utmi_l1_suspend;
 951                 if (pdata->hird_threshold)
 952                         hird_threshold = pdata->hird_threshold;
 953
 954                 dwc->usb3_lpm_capable = pdata->usb3_lpm_capable;
 955                 dwc->dr_mode = pdata->dr_mode;
 956
 957                 dwc->disable_scramble_quirk = pdata->disable_scramble_quirk;
 958                 dwc->u2exit_lfps_quirk = pdata->u2exit_lfps_quirk;
 959                 dwc->u2ss_inp3_quirk = pdata->u2ss_inp3_quirk;
 960                 dwc->req_p1p2p3_quirk = pdata->req_p1p2p3_quirk;
 961                 dwc->del_p1p2p3_quirk = pdata->del_p1p2p3_quirk;
 962                 dwc->del_phy_power_chg_quirk = pdata->del_phy_power_chg_quirk;
 963                 dwc->lfps_filter_quirk = pdata->lfps_filter_quirk;
 964                 dwc->rx_detect_poll_quirk = pdata->rx_detect_poll_quirk;
 965                 dwc->dis_u3_susphy_quirk = pdata->dis_u3_susphy_quirk;
 966                 dwc->dis_u2_susphy_quirk = pdata->dis_u2_susphy_quirk;
 967                 dwc->dis_enblslpm_quirk = pdata->dis_enblslpm_quirk;
 968                 dwc->dis_rxdet_inp3_quirk = pdata->dis_rxdet_inp3_quirk;
 969
 970                 dwc->tx_de_emphasis_quirk = pdata->tx_de_emphasis_quirk;
 971                 if (pdata->tx_de_emphasis)
 972                         tx_de_emphasis = pdata->tx_de_emphasis;
 973
 974                 dwc->hsphy_interface = pdata->hsphy_interface;
 975                 dwc->fladj = pdata->fladj_value;
 976         }
 977
 978         dwc->lpm_nyet_threshold = lpm_nyet_threshold;
 979         dwc->tx_de_emphasis = tx_de_emphasis;
 980
 981         dwc->hird_threshold = hird_threshold
 982                 | (dwc->is_utmi_l1_suspend << 4);
 983
 984         platform_set_drvdata(pdev, dwc);
 985         dwc3_cache_hwparams(dwc);
 986
 987         ret = dwc3_core_get_phy(dwc);
 988         if (ret)
 989                 goto err0;
 990
 991         spin_lock_init(&dwc->lock);
 992
 993         if (!dev->dma_mask) {
 994                 dev->dma_mask = dev->parent->dma_mask;
 995                 dev->dma_parms = dev->parent->dma_parms;
 996                 dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask);
 997         }
 998
 999         pm_runtime_enable(dev);
1000         pm_runtime_get_sync(dev);
1001         pm_runtime_forbid(dev);
1002
1003         ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
1004         if (ret) {
1005                 dev_err(dwc->dev, "failed to allocate event buffers\n");
1006                 ret = -ENOMEM;
1007                 goto err0;
1008         }
1009
1010         if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
1011                 dwc->dr_mode = USB_DR_MODE_HOST;
1012         else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
1013                 dwc->dr_mode = USB_DR_MODE_PERIPHERAL;
1014
1015         if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
1016                 dwc->dr_mode = USB_DR_MODE_OTG;
1017
1018         ret = dwc3_alloc_scratch_buffers(dwc);
1019         if (ret)
1020                 goto err1;
1021
1022         ret = dwc3_core_init(dwc);
1023         if (ret) {
1024                 dev_err(dev, "failed to initialize core\n");
1025                 goto err2;
1026         }
1027
1028         /* Check the maximum_speed parameter */
1029         switch (dwc->maximum_speed) {
1030         case USB_SPEED_LOW:
1031         case USB_SPEED_FULL:
1032         case USB_SPEED_HIGH:
1033         case USB_SPEED_SUPER:
1034         case USB_SPEED_SUPER_PLUS:
1035                 break;
1036         default:
1037                 dev_err(dev, "invalid maximum_speed parameter %d\n",
1038                         dwc->maximum_speed);
1039                 /* fall through */
1040         case USB_SPEED_UNKNOWN:
1041                 /* default to superspeed */
1042                 dwc->maximum_speed = USB_SPEED_SUPER;
1043
1044                 /*
1045                  * default to superspeed plus if we are capable.
1046                  */
1047                 if (dwc3_is_usb31(dwc) &&
1048                     (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) ==
1049                      DWC3_GHWPARAMS3_SSPHY_IFC_GEN2))
1050                         dwc->maximum_speed = USB_SPEED_SUPER_PLUS;
1051
1052                 break;
1053         }
1054
1055         ret = dwc3_core_init_mode(dwc);
1056         if (ret)
1057                 goto err3;
1058
1059         dwc3_debugfs_init(dwc);
1060         pm_runtime_allow(dev);
1061
1062         return 0;
1063
1064 err3:
1065         dwc3_event_buffers_cleanup(dwc);
1066
1067 err2:
1068         dwc3_free_scratch_buffers(dwc);
1069
1070 err1:
1071         dwc3_free_event_buffers(dwc);
1072         dwc3_ulpi_exit(dwc);
1073
1074 err0:
1075         /*
1076          * restore res->start back to its original value so that, in case the
1077          * probe is deferred, we don't end up getting error in request the
1078          * memory region the next time probe is called.
1079          */
1080         res->start -= DWC3_GLOBALS_REGS_START;
1081
1082         return ret;
1083 }
1084
1085 static int dwc3_remove(struct platform_device *pdev)
1086 {
1087         struct dwc3     *dwc = platform_get_drvdata(pdev);
1088         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1089
1090         /*
1091          * restore res->start back to its original value so that, in case the
1092          * probe is deferred, we don't end up getting error in request the
1093          * memory region the next time probe is called.
1094          */
1095         res->start -= DWC3_GLOBALS_REGS_START;
1096
1097         dwc3_debugfs_exit(dwc);
1098         dwc3_core_exit_mode(dwc);
1099
1100         dwc3_core_exit(dwc);
1101         dwc3_ulpi_exit(dwc);
1102
1103         dwc3_free_event_buffers(dwc);
1104         dwc3_free_scratch_buffers(dwc);
1105
1106         pm_runtime_put_sync(&pdev->dev);
1107         pm_runtime_disable(&pdev->dev);
1108
1109         return 0;
1110 }
1111
1112 #ifdef CONFIG_PM_SLEEP
1113 static int dwc3_suspend(struct device *dev)
1114 {
1115         struct dwc3     *dwc = dev_get_drvdata(dev);
1116         unsigned long   flags;
1117
1118         spin_lock_irqsave(&dwc->lock, flags);
1119
1120         switch (dwc->dr_mode) {
1121         case USB_DR_MODE_PERIPHERAL:
1122         case USB_DR_MODE_OTG:
1123                 dwc3_gadget_suspend(dwc);
1124                 /* FALLTHROUGH */
1125         case USB_DR_MODE_HOST:
1126         default:
1127                 dwc3_event_buffers_cleanup(dwc);
1128                 break;
1129         }
1130
1131         dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL);
1132         spin_unlock_irqrestore(&dwc->lock, flags);
1133
1134         usb_phy_shutdown(dwc->usb3_phy);
1135         usb_phy_shutdown(dwc->usb2_phy);
1136         phy_exit(dwc->usb2_generic_phy);
1137         phy_exit(dwc->usb3_generic_phy);
1138
1139         usb_phy_set_suspend(dwc->usb2_phy, 1);
1140         usb_phy_set_suspend(dwc->usb3_phy, 1);
1141         WARN_ON(phy_power_off(dwc->usb2_generic_phy) < 0);
1142         WARN_ON(phy_power_off(dwc->usb3_generic_phy) < 0);
1143
1144         pinctrl_pm_select_sleep_state(dev);
1145
1146         return 0;
1147 }
1148
1149 static int dwc3_resume(struct device *dev)
1150 {
1151         struct dwc3     *dwc = dev_get_drvdata(dev);
1152         unsigned long   flags;
1153         int             ret;
1154
1155         pinctrl_pm_select_default_state(dev);
1156
1157         usb_phy_set_suspend(dwc->usb2_phy, 0);
1158         usb_phy_set_suspend(dwc->usb3_phy, 0);
1159         ret = phy_power_on(dwc->usb2_generic_phy);
1160         if (ret < 0)
1161                 return ret;
1162
1163         ret = phy_power_on(dwc->usb3_generic_phy);
1164         if (ret < 0)
1165                 goto err_usb2phy_power;
1166
1167         usb_phy_init(dwc->usb3_phy);
1168         usb_phy_init(dwc->usb2_phy);
1169         ret = phy_init(dwc->usb2_generic_phy);
1170         if (ret < 0)
1171                 goto err_usb3phy_power;
1172
1173         ret = phy_init(dwc->usb3_generic_phy);
1174         if (ret < 0)
1175                 goto err_usb2phy_init;
1176
1177         spin_lock_irqsave(&dwc->lock, flags);
1178
1179         dwc3_event_buffers_setup(dwc);
1180         dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl);
1181
1182         switch (dwc->dr_mode) {
1183         case USB_DR_MODE_PERIPHERAL:
1184         case USB_DR_MODE_OTG:
1185                 dwc3_gadget_resume(dwc);
1186                 /* FALLTHROUGH */
1187         case USB_DR_MODE_HOST:
1188         default:
1189                 /* do nothing */
1190                 break;
1191         }
1192
1193         spin_unlock_irqrestore(&dwc->lock, flags);
1194
1195         pm_runtime_disable(dev);
1196         pm_runtime_set_active(dev);
1197         pm_runtime_enable(dev);
1198
1199         return 0;
1200
1201 err_usb2phy_init:
1202         phy_exit(dwc->usb2_generic_phy);
1203
1204 err_usb3phy_power:
1205         phy_power_off(dwc->usb3_generic_phy);
1206
1207 err_usb2phy_power:
1208         phy_power_off(dwc->usb2_generic_phy);
1209
1210         return ret;
1211 }
1212 #endif /* CONFIG_PM_SLEEP */
1213
1214 static const struct dev_pm_ops dwc3_dev_pm_ops = {
1215         SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
1216 };
1217
1218 #ifdef CONFIG_OF
1219 static const struct of_device_id of_dwc3_match[] = {
1220         {
1221                 .compatible = "snps,dwc3"
1222         },
1223         {
1224                 .compatible = "synopsys,dwc3"
1225         },
1226         { },
1227 };
1228 MODULE_DEVICE_TABLE(of, of_dwc3_match);
1229 #endif
1230
1231 #ifdef CONFIG_ACPI
1232
1233 #define ACPI_ID_INTEL_BSW       "808622B7"
1234
1235 static const struct acpi_device_id dwc3_acpi_match[] = {
1236         { ACPI_ID_INTEL_BSW, 0 },
1237         { },
1238 };
1239 MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match);
1240 #endif
1241
1242 static struct platform_driver dwc3_driver = {
1243         .probe          = dwc3_probe,
1244         .remove         = dwc3_remove,
1245         .driver         = {
1246                 .name   = "dwc3",
1247                 .of_match_table = of_match_ptr(of_dwc3_match),
1248                 .acpi_match_table = ACPI_PTR(dwc3_acpi_match),
1249                 .pm     = &dwc3_dev_pm_ops,
1250         },
1251 };
1252
1253 module_platform_driver(dwc3_driver);
1254
1255 MODULE_ALIAS("platform:dwc3");
1256 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
1257 MODULE_LICENSE("GPL v2");
1258 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");