drivers/usb/dwc3/dwc3-omap.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * dwc3-omap.c - OMAP Specific Glue layer
   4  *
   5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
   6  *
   7  * Authors: Felipe Balbi <balbi@ti.com>,
   8  *          Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/kernel.h>
  13 #include <linux/slab.h>
  14 #include <linux/irq.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/pm_runtime.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/ioport.h>
  20 #include <linux/io.h>
  21 #include <linux/of.h>
  22 #include <linux/of_platform.h>
  23 #include <linux/extcon.h>
  24 #include <linux/regulator/consumer.h>
  25
  26 #include <linux/usb/otg.h>
  27
  28 /*
  29  * All these registers belong to OMAP's Wrapper around the
  30  * DesignWare USB3 Core.
  31  */
  32
  33 #define USBOTGSS_REVISION                       0x0000
  34 #define USBOTGSS_SYSCONFIG                      0x0010
  35 #define USBOTGSS_IRQ_EOI                        0x0020
  36 #define USBOTGSS_EOI_OFFSET                     0x0008
  37 #define USBOTGSS_IRQSTATUS_RAW_0                0x0024
  38 #define USBOTGSS_IRQSTATUS_0                    0x0028
  39 #define USBOTGSS_IRQENABLE_SET_0                0x002c
  40 #define USBOTGSS_IRQENABLE_CLR_0                0x0030
  41 #define USBOTGSS_IRQ0_OFFSET                    0x0004
  42 #define USBOTGSS_IRQSTATUS_RAW_1                0x0030
  43 #define USBOTGSS_IRQSTATUS_1                    0x0034
  44 #define USBOTGSS_IRQENABLE_SET_1                0x0038
  45 #define USBOTGSS_IRQENABLE_CLR_1                0x003c
  46 #define USBOTGSS_IRQSTATUS_RAW_2                0x0040
  47 #define USBOTGSS_IRQSTATUS_2                    0x0044
  48 #define USBOTGSS_IRQENABLE_SET_2                0x0048
  49 #define USBOTGSS_IRQENABLE_CLR_2                0x004c
  50 #define USBOTGSS_IRQSTATUS_RAW_3                0x0050
  51 #define USBOTGSS_IRQSTATUS_3                    0x0054
  52 #define USBOTGSS_IRQENABLE_SET_3                0x0058
  53 #define USBOTGSS_IRQENABLE_CLR_3                0x005c
  54 #define USBOTGSS_IRQSTATUS_EOI_MISC             0x0030
  55 #define USBOTGSS_IRQSTATUS_RAW_MISC             0x0034
  56 #define USBOTGSS_IRQSTATUS_MISC                 0x0038
  57 #define USBOTGSS_IRQENABLE_SET_MISC             0x003c
  58 #define USBOTGSS_IRQENABLE_CLR_MISC             0x0040
  59 #define USBOTGSS_IRQMISC_OFFSET                 0x03fc
  60 #define USBOTGSS_UTMI_OTG_STATUS                0x0080
  61 #define USBOTGSS_UTMI_OTG_CTRL                  0x0084
  62 #define USBOTGSS_UTMI_OTG_OFFSET                0x0480
  63 #define USBOTGSS_TXFIFO_DEPTH                   0x0508
  64 #define USBOTGSS_RXFIFO_DEPTH                   0x050c
  65 #define USBOTGSS_MMRAM_OFFSET                   0x0100
  66 #define USBOTGSS_FLADJ                          0x0104
  67 #define USBOTGSS_DEBUG_CFG                      0x0108
  68 #define USBOTGSS_DEBUG_DATA                     0x010c
  69 #define USBOTGSS_DEV_EBC_EN                     0x0110
  70 #define USBOTGSS_DEBUG_OFFSET                   0x0600
  71
  72 /* SYSCONFIG REGISTER */
  73 #define USBOTGSS_SYSCONFIG_DMADISABLE           BIT(16)
  74
  75 /* IRQ_EOI REGISTER */
  76 #define USBOTGSS_IRQ_EOI_LINE_NUMBER            BIT(0)
  77
  78 /* IRQS0 BITS */
  79 #define USBOTGSS_IRQO_COREIRQ_ST                BIT(0)
  80
  81 /* IRQMISC BITS */
  82 #define USBOTGSS_IRQMISC_DMADISABLECLR          BIT(17)
  83 #define USBOTGSS_IRQMISC_OEVT                   BIT(16)
  84 #define USBOTGSS_IRQMISC_DRVVBUS_RISE           BIT(13)
  85 #define USBOTGSS_IRQMISC_CHRGVBUS_RISE          BIT(12)
  86 #define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE       BIT(11)
  87 #define USBOTGSS_IRQMISC_IDPULLUP_RISE          BIT(8)
  88 #define USBOTGSS_IRQMISC_DRVVBUS_FALL           BIT(5)
  89 #define USBOTGSS_IRQMISC_CHRGVBUS_FALL          BIT(4)
  90 #define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL               BIT(3)
  91 #define USBOTGSS_IRQMISC_IDPULLUP_FALL          BIT(0)
  92
  93 /* UTMI_OTG_STATUS REGISTER */
  94 #define USBOTGSS_UTMI_OTG_STATUS_DRVVBUS        BIT(5)
  95 #define USBOTGSS_UTMI_OTG_STATUS_CHRGVBUS       BIT(4)
  96 #define USBOTGSS_UTMI_OTG_STATUS_DISCHRGVBUS    BIT(3)
  97 #define USBOTGSS_UTMI_OTG_STATUS_IDPULLUP       BIT(0)
  98
  99 /* UTMI_OTG_CTRL REGISTER */
 100 #define USBOTGSS_UTMI_OTG_CTRL_SW_MODE          BIT(31)
 101 #define USBOTGSS_UTMI_OTG_CTRL_POWERPRESENT     BIT(9)
 102 #define USBOTGSS_UTMI_OTG_CTRL_TXBITSTUFFENABLE BIT(8)
 103 #define USBOTGSS_UTMI_OTG_CTRL_IDDIG            BIT(4)
 104 #define USBOTGSS_UTMI_OTG_CTRL_SESSEND          BIT(3)
 105 #define USBOTGSS_UTMI_OTG_CTRL_SESSVALID        BIT(2)
 106 #define USBOTGSS_UTMI_OTG_CTRL_VBUSVALID        BIT(1)
 107
 108 enum dwc3_omap_utmi_mode {
 109         DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
 110         DWC3_OMAP_UTMI_MODE_HW,
 111         DWC3_OMAP_UTMI_MODE_SW,
 112 };
 113
 114 struct dwc3_omap {
 115         struct device           *dev;
 116
 117         int                     irq;
 118         void __iomem            *base;
 119
 120         u32                     utmi_otg_ctrl;
 121         u32                     utmi_otg_offset;
 122         u32                     irqmisc_offset;
 123         u32                     irq_eoi_offset;
 124         u32                     debug_offset;
 125         u32                     irq0_offset;
 126
 127         struct extcon_dev       *edev;
 128         struct notifier_block   vbus_nb;
 129         struct notifier_block   id_nb;
 130
 131         struct regulator        *vbus_reg;
 132 };
 133
 134 enum omap_dwc3_vbus_id_status {
 135         OMAP_DWC3_ID_FLOAT,
 136         OMAP_DWC3_ID_GROUND,
 137         OMAP_DWC3_VBUS_OFF,
 138         OMAP_DWC3_VBUS_VALID,
 139 };
 140
 141 static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
 142 {
 143         return readl(base + offset);
 144 }
 145
 146 static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
 147 {
 148         writel(value, base + offset);
 149 }
 150
 151 static u32 dwc3_omap_read_utmi_ctrl(struct dwc3_omap *omap)
 152 {
 153         return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_CTRL +
 154                                                         omap->utmi_otg_offset);
 155 }
 156
 157 static void dwc3_omap_write_utmi_ctrl(struct dwc3_omap *omap, u32 value)
 158 {
 159         dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_CTRL +
 160                                         omap->utmi_otg_offset, value);
 161
 162 }
 163
 164 static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
 165 {
 166         return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_0 -
 167                                                 omap->irq0_offset);
 168 }
 169
 170 static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value)
 171 {
 172         dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0 -
 173                                                 omap->irq0_offset, value);
 174
 175 }
 176
 177 static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap)
 178 {
 179         return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_MISC +
 180                                                 omap->irqmisc_offset);
 181 }
 182
 183 static void dwc3_omap_write_irqmisc_status(struct dwc3_omap *omap, u32 value)
 184 {
 185         dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_MISC +
 186                                         omap->irqmisc_offset, value);
 187
 188 }
 189
 190 static void dwc3_omap_write_irqmisc_set(struct dwc3_omap *omap, u32 value)
 191 {
 192         dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_MISC +
 193                                                 omap->irqmisc_offset, value);
 194
 195 }
 196
 197 static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value)
 198 {
 199         dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0 -
 200                                                 omap->irq0_offset, value);
 201 }
 202
 203 static void dwc3_omap_write_irqmisc_clr(struct dwc3_omap *omap, u32 value)
 204 {
 205         dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_MISC +
 206                                                 omap->irqmisc_offset, value);
 207 }
 208
 209 static void dwc3_omap_write_irq0_clr(struct dwc3_omap *omap, u32 value)
 210 {
 211         dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_0 -
 212                                                 omap->irq0_offset, value);
 213 }
 214
 215 static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
 216         enum omap_dwc3_vbus_id_status status)
 217 {
 218         int     ret;
 219         u32     val;
 220
 221         switch (status) {
 222         case OMAP_DWC3_ID_GROUND:
 223                 if (omap->vbus_reg) {
 224                         ret = regulator_enable(omap->vbus_reg);
 225                         if (ret) {
 226                                 dev_err(omap->dev, "regulator enable failed\n");
 227                                 return;
 228                         }
 229                 }
 230
 231                 val = dwc3_omap_read_utmi_ctrl(omap);
 232                 val &= ~USBOTGSS_UTMI_OTG_CTRL_IDDIG;
 233                 dwc3_omap_write_utmi_ctrl(omap, val);
 234                 break;
 235
 236         case OMAP_DWC3_VBUS_VALID:
 237                 val = dwc3_omap_read_utmi_ctrl(omap);
 238                 val &= ~USBOTGSS_UTMI_OTG_CTRL_SESSEND;
 239                 val |= USBOTGSS_UTMI_OTG_CTRL_VBUSVALID
 240                                 | USBOTGSS_UTMI_OTG_CTRL_SESSVALID;
 241                 dwc3_omap_write_utmi_ctrl(omap, val);
 242                 break;
 243
 244         case OMAP_DWC3_ID_FLOAT:
 245                 if (omap->vbus_reg)
 246                         regulator_disable(omap->vbus_reg);
 247                 val = dwc3_omap_read_utmi_ctrl(omap);
 248                 val |= USBOTGSS_UTMI_OTG_CTRL_IDDIG;
 249                 dwc3_omap_write_utmi_ctrl(omap, val);
 250                 break;
 251
 252         case OMAP_DWC3_VBUS_OFF:
 253                 val = dwc3_omap_read_utmi_ctrl(omap);
 254                 val &= ~(USBOTGSS_UTMI_OTG_CTRL_SESSVALID
 255                                 | USBOTGSS_UTMI_OTG_CTRL_VBUSVALID);
 256                 val |= USBOTGSS_UTMI_OTG_CTRL_SESSEND;
 257                 dwc3_omap_write_utmi_ctrl(omap, val);
 258                 break;
 259
 260         default:
 261                 dev_WARN(omap->dev, "invalid state\n");
 262         }
 263 }
 264
 265 static void dwc3_omap_enable_irqs(struct dwc3_omap *omap);
 266 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap);
 267
 268 static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
 269 {
 270         struct dwc3_omap        *omap = _omap;
 271
 272         if (dwc3_omap_read_irqmisc_status(omap) ||
 273             dwc3_omap_read_irq0_status(omap)) {
 274                 /* mask irqs */
 275                 dwc3_omap_disable_irqs(omap);
 276                 return IRQ_WAKE_THREAD;
 277         }
 278
 279         return IRQ_NONE;
 280 }
 281
 282 static irqreturn_t dwc3_omap_interrupt_thread(int irq, void *_omap)
 283 {
 284         struct dwc3_omap        *omap = _omap;
 285         u32                     reg;
 286
 287         /* clear irq status flags */
 288         reg = dwc3_omap_read_irqmisc_status(omap);
 289         dwc3_omap_write_irqmisc_status(omap, reg);
 290
 291         reg = dwc3_omap_read_irq0_status(omap);
 292         dwc3_omap_write_irq0_status(omap, reg);
 293
 294         /* unmask irqs */
 295         dwc3_omap_enable_irqs(omap);
 296
 297         return IRQ_HANDLED;
 298 }
 299
 300 static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
 301 {
 302         u32                     reg;
 303
 304         /* enable all IRQs */
 305         reg = USBOTGSS_IRQO_COREIRQ_ST;
 306         dwc3_omap_write_irq0_set(omap, reg);
 307
 308         reg = (USBOTGSS_IRQMISC_OEVT |
 309                         USBOTGSS_IRQMISC_DRVVBUS_RISE |
 310                         USBOTGSS_IRQMISC_CHRGVBUS_RISE |
 311                         USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
 312                         USBOTGSS_IRQMISC_IDPULLUP_RISE |
 313                         USBOTGSS_IRQMISC_DRVVBUS_FALL |
 314                         USBOTGSS_IRQMISC_CHRGVBUS_FALL |
 315                         USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
 316                         USBOTGSS_IRQMISC_IDPULLUP_FALL);
 317
 318         dwc3_omap_write_irqmisc_set(omap, reg);
 319 }
 320
 321 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
 322 {
 323         u32                     reg;
 324
 325         /* disable all IRQs */
 326         reg = USBOTGSS_IRQO_COREIRQ_ST;
 327         dwc3_omap_write_irq0_clr(omap, reg);
 328
 329         reg = (USBOTGSS_IRQMISC_OEVT |
 330                         USBOTGSS_IRQMISC_DRVVBUS_RISE |
 331                         USBOTGSS_IRQMISC_CHRGVBUS_RISE |
 332                         USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
 333                         USBOTGSS_IRQMISC_IDPULLUP_RISE |
 334                         USBOTGSS_IRQMISC_DRVVBUS_FALL |
 335                         USBOTGSS_IRQMISC_CHRGVBUS_FALL |
 336                         USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
 337                         USBOTGSS_IRQMISC_IDPULLUP_FALL);
 338
 339         dwc3_omap_write_irqmisc_clr(omap, reg);
 340 }
 341
 342 static int dwc3_omap_id_notifier(struct notifier_block *nb,
 343         unsigned long event, void *ptr)
 344 {
 345         struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb);
 346
 347         if (event)
 348                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
 349         else
 350                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
 351
 352         return NOTIFY_DONE;
 353 }
 354
 355 static int dwc3_omap_vbus_notifier(struct notifier_block *nb,
 356         unsigned long event, void *ptr)
 357 {
 358         struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb);
 359
 360         if (event)
 361                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
 362         else
 363                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
 364
 365         return NOTIFY_DONE;
 366 }
 367
 368 static void dwc3_omap_map_offset(struct dwc3_omap *omap)
 369 {
 370         struct device_node      *node = omap->dev->of_node;
 371
 372         /*
 373          * Differentiate between OMAP5 and AM437x.
 374          *
 375          * For OMAP5(ES2.0) and AM437x wrapper revision is same, even
 376          * though there are changes in wrapper register offsets.
 377          *
 378          * Using dt compatible to differentiate AM437x.
 379          */
 380         if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
 381                 omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
 382                 omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
 383                 omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
 384                 omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
 385                 omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
 386         }
 387 }
 388
 389 static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
 390 {
 391         u32                     reg;
 392         struct device_node      *node = omap->dev->of_node;
 393         u32                     utmi_mode = 0;
 394
 395         reg = dwc3_omap_read_utmi_ctrl(omap);
 396
 397         of_property_read_u32(node, "utmi-mode", &utmi_mode);
 398
 399         switch (utmi_mode) {
 400         case DWC3_OMAP_UTMI_MODE_SW:
 401                 reg |= USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
 402                 break;
 403         case DWC3_OMAP_UTMI_MODE_HW:
 404                 reg &= ~USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
 405                 break;
 406         default:
 407                 dev_WARN(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode);
 408         }
 409
 410         dwc3_omap_write_utmi_ctrl(omap, reg);
 411 }
 412
 413 static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
 414 {
 415         int                     ret;
 416         struct device_node      *node = omap->dev->of_node;
 417         struct extcon_dev       *edev;
 418
 419         if (of_property_read_bool(node, "extcon")) {
 420                 edev = extcon_get_edev_by_phandle(omap->dev, 0);
 421                 if (IS_ERR(edev)) {
 422                         dev_vdbg(omap->dev, "couldn't get extcon device\n");
 423                         return -EPROBE_DEFER;
 424                 }
 425
 426                 omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
 427                 ret = devm_extcon_register_notifier(omap->dev, edev,
 428                                                 EXTCON_USB, &omap->vbus_nb);
 429                 if (ret < 0)
 430                         dev_vdbg(omap->dev, "failed to register notifier for USB\n");
 431
 432                 omap->id_nb.notifier_call = dwc3_omap_id_notifier;
 433                 ret = devm_extcon_register_notifier(omap->dev, edev,
 434                                                 EXTCON_USB_HOST, &omap->id_nb);
 435                 if (ret < 0)
 436                         dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");
 437
 438                 if (extcon_get_state(edev, EXTCON_USB) == true)
 439                         dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
 440                 if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
 441                         dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
 442
 443                 omap->edev = edev;
 444         }
 445
 446         return 0;
 447 }
 448
 449 static int dwc3_omap_probe(struct platform_device *pdev)
 450 {
 451         struct device_node      *node = pdev->dev.of_node;
 452
 453         struct dwc3_omap        *omap;
 454         struct device           *dev = &pdev->dev;
 455         struct regulator        *vbus_reg = NULL;
 456
 457         int                     ret;
 458         int                     irq;
 459
 460         void __iomem            *base;
 461
 462         if (!node) {
 463                 dev_err(dev, "device node not found\n");
 464                 return -EINVAL;
 465         }
 466
 467         omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
 468         if (!omap)
 469                 return -ENOMEM;
 470
 471         platform_set_drvdata(pdev, omap);
 472
 473         irq = platform_get_irq(pdev, 0);
 474         if (irq < 0)
 475                 return irq;
 476
 477         base = devm_platform_ioremap_resource(pdev, 0);
 478         if (IS_ERR(base))
 479                 return PTR_ERR(base);
 480
 481         if (of_property_read_bool(node, "vbus-supply")) {
 482                 vbus_reg = devm_regulator_get(dev, "vbus");
 483                 if (IS_ERR(vbus_reg)) {
 484                         dev_err(dev, "vbus init failed\n");
 485                         return PTR_ERR(vbus_reg);
 486                 }
 487         }
 488
 489         omap->dev       = dev;
 490         omap->irq       = irq;
 491         omap->base      = base;
 492         omap->vbus_reg  = vbus_reg;
 493
 494         pm_runtime_enable(dev);
 495         ret = pm_runtime_get_sync(dev);
 496         if (ret < 0) {
 497                 dev_err(dev, "get_sync failed with err %d\n", ret);
 498                 goto err1;
 499         }
 500
 501         dwc3_omap_map_offset(omap);
 502         dwc3_omap_set_utmi_mode(omap);
 503
 504         ret = dwc3_omap_extcon_register(omap);
 505         if (ret < 0)
 506                 goto err1;
 507
 508         ret = of_platform_populate(node, NULL, NULL, dev);
 509         if (ret) {
 510                 dev_err(&pdev->dev, "failed to create dwc3 core\n");
 511                 goto err1;
 512         }
 513
 514         ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
 515                                         dwc3_omap_interrupt_thread, IRQF_SHARED,
 516                                         "dwc3-omap", omap);
 517         if (ret) {
 518                 dev_err(dev, "failed to request IRQ #%d --> %d\n",
 519                         omap->irq, ret);
 520                 goto err1;
 521         }
 522         dwc3_omap_enable_irqs(omap);
 523         return 0;
 524
 525 err1:
 526         pm_runtime_put_sync(dev);
 527         pm_runtime_disable(dev);
 528
 529         return ret;
 530 }
 531
 532 static int dwc3_omap_remove(struct platform_device *pdev)
 533 {
 534         struct dwc3_omap        *omap = platform_get_drvdata(pdev);
 535
 536         dwc3_omap_disable_irqs(omap);
 537         disable_irq(omap->irq);
 538         of_platform_depopulate(omap->dev);
 539         pm_runtime_put_sync(&pdev->dev);
 540         pm_runtime_disable(&pdev->dev);
 541
 542         return 0;
 543 }
 544
 545 static const struct of_device_id of_dwc3_match[] = {
 546         {
 547                 .compatible =   "ti,dwc3"
 548         },
 549         {
 550                 .compatible =   "ti,am437x-dwc3"
 551         },
 552         { },
 553 };
 554 MODULE_DEVICE_TABLE(of, of_dwc3_match);
 555
 556 #ifdef CONFIG_PM_SLEEP
 557 static int dwc3_omap_suspend(struct device *dev)
 558 {
 559         struct dwc3_omap        *omap = dev_get_drvdata(dev);
 560
 561         omap->utmi_otg_ctrl = dwc3_omap_read_utmi_ctrl(omap);
 562         dwc3_omap_disable_irqs(omap);
 563
 564         return 0;
 565 }
 566
 567 static int dwc3_omap_resume(struct device *dev)
 568 {
 569         struct dwc3_omap        *omap = dev_get_drvdata(dev);
 570
 571         dwc3_omap_write_utmi_ctrl(omap, omap->utmi_otg_ctrl);
 572         dwc3_omap_enable_irqs(omap);
 573
 574         pm_runtime_disable(dev);
 575         pm_runtime_set_active(dev);
 576         pm_runtime_enable(dev);
 577
 578         return 0;
 579 }
 580
 581 static void dwc3_omap_complete(struct device *dev)
 582 {
 583         struct dwc3_omap        *omap = dev_get_drvdata(dev);
 584
 585         if (extcon_get_state(omap->edev, EXTCON_USB))
 586                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
 587         else
 588                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
 589
 590         if (extcon_get_state(omap->edev, EXTCON_USB_HOST))
 591                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
 592         else
 593                 dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
 594 }
 595
 596 static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
 597
 598         SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
 599         .complete = dwc3_omap_complete,
 600 };
 601
 602 #define DEV_PM_OPS      (&dwc3_omap_dev_pm_ops)
 603 #else
 604 #define DEV_PM_OPS      NULL
 605 #endif /* CONFIG_PM_SLEEP */
 606
 607 static struct platform_driver dwc3_omap_driver = {
 608         .probe          = dwc3_omap_probe,
 609         .remove         = dwc3_omap_remove,
 610         .driver         = {
 611                 .name   = "omap-dwc3",
 612                 .of_match_table = of_dwc3_match,
 613                 .pm     = DEV_PM_OPS,
 614         },
 615 };
 616
 617 module_platform_driver(dwc3_omap_driver);
 618
 619 MODULE_ALIAS("platform:omap-dwc3");
 620 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 621 MODULE_LICENSE("GPL v2");
 622 MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");