drivers/phy/broadcom/phy-brcm-usb.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * phy-brcm-usb.c - Broadcom USB Phy Driver
   4  *
   5  * Copyright (C) 2015-2017 Broadcom
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/delay.h>
  10 #include <linux/err.h>
  11 #include <linux/io.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/phy/phy.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/soc/brcmstb/brcmstb.h>
  18 #include <dt-bindings/phy/phy.h>
  19 #include <linux/mfd/syscon.h>
  20 #include <linux/suspend.h>
  21
  22 #include "phy-brcm-usb-init.h"
  23
  24 static DEFINE_MUTEX(sysfs_lock);
  25
  26 enum brcm_usb_phy_id {
  27         BRCM_USB_PHY_2_0 = 0,
  28         BRCM_USB_PHY_3_0,
  29         BRCM_USB_PHY_ID_MAX
  30 };
  31
  32 struct value_to_name_map {
  33         int value;
  34         const char *name;
  35 };
  36
  37 struct match_chip_info {
  38         void (*init_func)(struct brcm_usb_init_params *params);
  39         u8 required_regs[BRCM_REGS_MAX + 1];
  40         u8 optional_reg;
  41 };
  42
  43 static const struct value_to_name_map brcm_dr_mode_to_name[] = {
  44         { USB_CTLR_MODE_HOST, "host" },
  45         { USB_CTLR_MODE_DEVICE, "peripheral" },
  46         { USB_CTLR_MODE_DRD, "drd" },
  47         { USB_CTLR_MODE_TYPEC_PD, "typec-pd" }
  48 };
  49
  50 static const struct value_to_name_map brcm_dual_mode_to_name[] = {
  51         { 0, "host" },
  52         { 1, "device" },
  53         { 2, "auto" },
  54 };
  55
  56 struct brcm_usb_phy {
  57         struct phy *phy;
  58         unsigned int id;
  59         bool inited;
  60 };
  61
  62 struct brcm_usb_phy_data {
  63         struct  brcm_usb_init_params ini;
  64         bool                    has_eohci;
  65         bool                    has_xhci;
  66         struct clk              *usb_20_clk;
  67         struct clk              *usb_30_clk;
  68         struct clk              *suspend_clk;
  69         struct mutex            mutex;  /* serialize phy init */
  70         int                     init_count;
  71         int                     wake_irq;
  72         struct brcm_usb_phy     phys[BRCM_USB_PHY_ID_MAX];
  73         struct notifier_block   pm_notifier;
  74         bool                    pm_active;
  75 };
  76
  77 static s8 *node_reg_names[BRCM_REGS_MAX] = {
  78         "crtl", "xhci_ec", "xhci_gbl", "usb_phy", "usb_mdio", "bdc_ec"
  79 };
  80
  81 static int brcm_pm_notifier(struct notifier_block *notifier,
  82                             unsigned long pm_event,
  83                             void *unused)
  84 {
  85         struct brcm_usb_phy_data *priv =
  86                 container_of(notifier, struct brcm_usb_phy_data, pm_notifier);
  87
  88         switch (pm_event) {
  89         case PM_HIBERNATION_PREPARE:
  90         case PM_SUSPEND_PREPARE:
  91                 priv->pm_active = true;
  92                 break;
  93         case PM_POST_RESTORE:
  94         case PM_POST_HIBERNATION:
  95         case PM_POST_SUSPEND:
  96                 priv->pm_active = false;
  97                 break;
  98         }
  99         return NOTIFY_DONE;
 100 }
 101
 102 static irqreturn_t brcm_usb_phy_wake_isr(int irq, void *dev_id)
 103 {
 104         struct device *dev = dev_id;
 105
 106         pm_wakeup_event(dev, 0);
 107
 108         return IRQ_HANDLED;
 109 }
 110
 111 static int brcm_usb_phy_init(struct phy *gphy)
 112 {
 113         struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
 114         struct brcm_usb_phy_data *priv =
 115                 container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
 116
 117         if (priv->pm_active)
 118                 return 0;
 119
 120         /*
 121          * Use a lock to make sure a second caller waits until
 122          * the base phy is inited before using it.
 123          */
 124         mutex_lock(&priv->mutex);
 125         if (priv->init_count++ == 0) {
 126                 clk_prepare_enable(priv->usb_20_clk);
 127                 clk_prepare_enable(priv->usb_30_clk);
 128                 clk_prepare_enable(priv->suspend_clk);
 129                 brcm_usb_init_common(&priv->ini);
 130         }
 131         mutex_unlock(&priv->mutex);
 132         if (phy->id == BRCM_USB_PHY_2_0)
 133                 brcm_usb_init_eohci(&priv->ini);
 134         else if (phy->id == BRCM_USB_PHY_3_0)
 135                 brcm_usb_init_xhci(&priv->ini);
 136         phy->inited = true;
 137         dev_dbg(&gphy->dev, "INIT, id: %d, total: %d\n", phy->id,
 138                 priv->init_count);
 139
 140         return 0;
 141 }
 142
 143 static int brcm_usb_phy_exit(struct phy *gphy)
 144 {
 145         struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
 146         struct brcm_usb_phy_data *priv =
 147                 container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);
 148
 149         if (priv->pm_active)
 150                 return 0;
 151
 152         dev_dbg(&gphy->dev, "EXIT\n");
 153         if (phy->id == BRCM_USB_PHY_2_0)
 154                 brcm_usb_uninit_eohci(&priv->ini);
 155         if (phy->id == BRCM_USB_PHY_3_0)
 156                 brcm_usb_uninit_xhci(&priv->ini);
 157
 158         /* If both xhci and eohci are gone, reset everything else */
 159         mutex_lock(&priv->mutex);
 160         if (--priv->init_count == 0) {
 161                 brcm_usb_uninit_common(&priv->ini);
 162                 clk_disable_unprepare(priv->usb_20_clk);
 163                 clk_disable_unprepare(priv->usb_30_clk);
 164                 clk_disable_unprepare(priv->suspend_clk);
 165         }
 166         mutex_unlock(&priv->mutex);
 167         phy->inited = false;
 168         return 0;
 169 }
 170
 171 static const struct phy_ops brcm_usb_phy_ops = {
 172         .init           = brcm_usb_phy_init,
 173         .exit           = brcm_usb_phy_exit,
 174         .owner          = THIS_MODULE,
 175 };
 176
 177 static struct phy *brcm_usb_phy_xlate(struct device *dev,
 178                                       const struct of_phandle_args *args)
 179 {
 180         struct brcm_usb_phy_data *data = dev_get_drvdata(dev);
 181
 182         /*
 183          * values 0 and 1 are for backward compatibility with
 184          * device tree nodes from older bootloaders.
 185          */
 186         switch (args->args[0]) {
 187         case 0:
 188         case PHY_TYPE_USB2:
 189                 if (data->phys[BRCM_USB_PHY_2_0].phy)
 190                         return data->phys[BRCM_USB_PHY_2_0].phy;
 191                 dev_warn(dev, "Error, 2.0 Phy not found\n");
 192                 break;
 193         case 1:
 194         case PHY_TYPE_USB3:
 195                 if (data->phys[BRCM_USB_PHY_3_0].phy)
 196                         return data->phys[BRCM_USB_PHY_3_0].phy;
 197                 dev_warn(dev, "Error, 3.0 Phy not found\n");
 198                 break;
 199         }
 200         return ERR_PTR(-ENODEV);
 201 }
 202
 203 static int name_to_value(const struct value_to_name_map *table, int count,
 204                          const char *name, int *value)
 205 {
 206         int x;
 207
 208         *value = 0;
 209         for (x = 0; x < count; x++) {
 210                 if (sysfs_streq(name, table[x].name)) {
 211                         *value = x;
 212                         return 0;
 213                 }
 214         }
 215         return -EINVAL;
 216 }
 217
 218 static const char *value_to_name(const struct value_to_name_map *table, int count,
 219                                  int value)
 220 {
 221         if (value >= count)
 222                 return "unknown";
 223         return table[value].name;
 224 }
 225
 226 static ssize_t dr_mode_show(struct device *dev,
 227                             struct device_attribute *attr,
 228                             char *buf)
 229 {
 230         struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 231
 232         return sprintf(buf, "%s\n",
 233                 value_to_name(&brcm_dr_mode_to_name[0],
 234                               ARRAY_SIZE(brcm_dr_mode_to_name),
 235                               priv->ini.supported_port_modes));
 236 }
 237 static DEVICE_ATTR_RO(dr_mode);
 238
 239 static ssize_t dual_select_store(struct device *dev,
 240                                  struct device_attribute *attr,
 241                                  const char *buf, size_t len)
 242 {
 243         struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 244         int value;
 245         int res;
 246
 247         mutex_lock(&sysfs_lock);
 248         res = name_to_value(&brcm_dual_mode_to_name[0],
 249                             ARRAY_SIZE(brcm_dual_mode_to_name), buf, &value);
 250         if (!res) {
 251                 priv->ini.port_mode = value;
 252                 brcm_usb_set_dual_select(&priv->ini);
 253                 res = len;
 254         }
 255         mutex_unlock(&sysfs_lock);
 256         return res;
 257 }
 258
 259 static ssize_t dual_select_show(struct device *dev,
 260                                 struct device_attribute *attr,
 261                                 char *buf)
 262 {
 263         struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 264         int value;
 265
 266         mutex_lock(&sysfs_lock);
 267         value = brcm_usb_get_dual_select(&priv->ini);
 268         mutex_unlock(&sysfs_lock);
 269         return sprintf(buf, "%s\n",
 270                 value_to_name(&brcm_dual_mode_to_name[0],
 271                               ARRAY_SIZE(brcm_dual_mode_to_name),
 272                               value));
 273 }
 274 static DEVICE_ATTR_RW(dual_select);
 275
 276 static struct attribute *brcm_usb_phy_attrs[] = {
 277         &dev_attr_dr_mode.attr,
 278         &dev_attr_dual_select.attr,
 279         NULL
 280 };
 281
 282 static const struct attribute_group brcm_usb_phy_group = {
 283         .attrs = brcm_usb_phy_attrs,
 284 };
 285
 286 static const struct match_chip_info chip_info_4908 = {
 287         .init_func = &brcm_usb_dvr_init_4908,
 288         .required_regs = {
 289                 BRCM_REGS_CTRL,
 290                 BRCM_REGS_XHCI_EC,
 291                 -1,
 292         },
 293 };
 294
 295 static const struct match_chip_info chip_info_7216 = {
 296         .init_func = &brcm_usb_dvr_init_7216,
 297         .required_regs = {
 298                 BRCM_REGS_CTRL,
 299                 BRCM_REGS_XHCI_EC,
 300                 BRCM_REGS_XHCI_GBL,
 301                 -1,
 302         },
 303 };
 304
 305 static const struct match_chip_info chip_info_7211b0 = {
 306         .init_func = &brcm_usb_dvr_init_7211b0,
 307         .required_regs = {
 308                 BRCM_REGS_CTRL,
 309                 BRCM_REGS_XHCI_EC,
 310                 BRCM_REGS_XHCI_GBL,
 311                 BRCM_REGS_USB_PHY,
 312                 BRCM_REGS_USB_MDIO,
 313                 -1,
 314         },
 315         .optional_reg = BRCM_REGS_BDC_EC,
 316 };
 317
 318 static const struct match_chip_info chip_info_7445 = {
 319         .init_func = &brcm_usb_dvr_init_7445,
 320         .required_regs = {
 321                 BRCM_REGS_CTRL,
 322                 BRCM_REGS_XHCI_EC,
 323                 -1,
 324         },
 325 };
 326
 327 static const struct of_device_id brcm_usb_dt_ids[] = {
 328         {
 329                 .compatible = "brcm,bcm4908-usb-phy",
 330                 .data = &chip_info_4908,
 331         },
 332         {
 333                 .compatible = "brcm,bcm7216-usb-phy",
 334                 .data = &chip_info_7216,
 335         },
 336         {
 337                 .compatible = "brcm,bcm7211-usb-phy",
 338                 .data = &chip_info_7211b0,
 339         },
 340         {
 341                 .compatible = "brcm,brcmstb-usb-phy",
 342                 .data = &chip_info_7445,
 343         },
 344         { /* sentinel */ }
 345 };
 346
 347 static int brcm_usb_get_regs(struct platform_device *pdev,
 348                              enum brcmusb_reg_sel regs,
 349                              struct  brcm_usb_init_params *ini,
 350                              bool optional)
 351 {
 352         struct resource *res;
 353
 354         /* Older DT nodes have ctrl and optional xhci_ec by index only */
 355         res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
 356                                                 node_reg_names[regs]);
 357         if (res == NULL) {
 358                 if (regs == BRCM_REGS_CTRL) {
 359                         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 360                 } else if (regs == BRCM_REGS_XHCI_EC) {
 361                         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 362                         /* XHCI_EC registers are optional */
 363                         if (res == NULL)
 364                                 return 0;
 365                 }
 366                 if (res == NULL) {
 367                         if (optional) {
 368                                 dev_dbg(&pdev->dev,
 369                                         "Optional reg %s not found\n",
 370                                         node_reg_names[regs]);
 371                                 return 0;
 372                         }
 373                         dev_err(&pdev->dev, "can't get %s base addr\n",
 374                                 node_reg_names[regs]);
 375                         return 1;
 376                 }
 377         }
 378         ini->regs[regs] = devm_ioremap_resource(&pdev->dev, res);
 379         if (IS_ERR(ini->regs[regs])) {
 380                 dev_err(&pdev->dev, "can't map %s register space\n",
 381                         node_reg_names[regs]);
 382                 return 1;
 383         }
 384         return 0;
 385 }
 386
 387 static int brcm_usb_phy_dvr_init(struct platform_device *pdev,
 388                                  struct brcm_usb_phy_data *priv,
 389                                  struct device_node *dn)
 390 {
 391         struct device *dev = &pdev->dev;
 392         struct phy *gphy = NULL;
 393         int err;
 394
 395         priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
 396         if (IS_ERR(priv->usb_20_clk)) {
 397                 if (PTR_ERR(priv->usb_20_clk) == -EPROBE_DEFER)
 398                         return -EPROBE_DEFER;
 399                 dev_info(dev, "Clock not found in Device Tree\n");
 400                 priv->usb_20_clk = NULL;
 401         }
 402         err = clk_prepare_enable(priv->usb_20_clk);
 403         if (err)
 404                 return err;
 405
 406         if (priv->has_eohci) {
 407                 gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
 408                 if (IS_ERR(gphy)) {
 409                         dev_err(dev, "failed to create EHCI/OHCI PHY\n");
 410                         return PTR_ERR(gphy);
 411                 }
 412                 priv->phys[BRCM_USB_PHY_2_0].phy = gphy;
 413                 priv->phys[BRCM_USB_PHY_2_0].id = BRCM_USB_PHY_2_0;
 414                 phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_2_0]);
 415         }
 416
 417         if (priv->has_xhci) {
 418                 gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
 419                 if (IS_ERR(gphy)) {
 420                         dev_err(dev, "failed to create XHCI PHY\n");
 421                         return PTR_ERR(gphy);
 422                 }
 423                 priv->phys[BRCM_USB_PHY_3_0].phy = gphy;
 424                 priv->phys[BRCM_USB_PHY_3_0].id = BRCM_USB_PHY_3_0;
 425                 phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_3_0]);
 426
 427                 priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
 428                 if (IS_ERR(priv->usb_30_clk)) {
 429                         if (PTR_ERR(priv->usb_30_clk) == -EPROBE_DEFER)
 430                                 return -EPROBE_DEFER;
 431                         dev_info(dev,
 432                                  "USB3.0 clock not found in Device Tree\n");
 433                         priv->usb_30_clk = NULL;
 434                 }
 435                 err = clk_prepare_enable(priv->usb_30_clk);
 436                 if (err)
 437                         return err;
 438         }
 439
 440         priv->suspend_clk = clk_get(dev, "usb0_freerun");
 441         if (IS_ERR(priv->suspend_clk)) {
 442                 if (PTR_ERR(priv->suspend_clk) == -EPROBE_DEFER)
 443                         return -EPROBE_DEFER;
 444                 dev_err(dev, "Suspend Clock not found in Device Tree\n");
 445                 priv->suspend_clk = NULL;
 446         }
 447
 448         priv->wake_irq = platform_get_irq_byname_optional(pdev, "wake");
 449         if (priv->wake_irq < 0)
 450                 priv->wake_irq = platform_get_irq_byname_optional(pdev, "wakeup");
 451         if (priv->wake_irq >= 0) {
 452                 err = devm_request_irq(dev, priv->wake_irq,
 453                                        brcm_usb_phy_wake_isr, 0,
 454                                        dev_name(dev), dev);
 455                 if (err < 0)
 456                         return err;
 457                 device_set_wakeup_capable(dev, 1);
 458         } else {
 459                 dev_info(dev,
 460                          "Wake interrupt missing, system wake not supported\n");
 461         }
 462
 463         return 0;
 464 }
 465
 466 static int brcm_usb_phy_probe(struct platform_device *pdev)
 467 {
 468         struct device *dev = &pdev->dev;
 469         struct brcm_usb_phy_data *priv;
 470         struct phy_provider *phy_provider;
 471         struct device_node *dn = pdev->dev.of_node;
 472         int err;
 473         const char *mode;
 474         const struct match_chip_info *info;
 475         struct regmap *rmap;
 476         int x;
 477
 478         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 479         if (!priv)
 480                 return -ENOMEM;
 481         platform_set_drvdata(pdev, priv);
 482
 483         priv->ini.family_id = brcmstb_get_family_id();
 484         priv->ini.product_id = brcmstb_get_product_id();
 485
 486         info = of_device_get_match_data(&pdev->dev);
 487         if (!info)
 488                 return -ENOENT;
 489
 490         info->init_func(&priv->ini);
 491
 492         dev_dbg(dev, "Best mapping table is for %s\n",
 493                 priv->ini.family_name);
 494
 495         of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
 496         of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);
 497
 498         priv->ini.supported_port_modes = USB_CTLR_MODE_HOST;
 499         err = of_property_read_string(dn, "dr_mode", &mode);
 500         if (err == 0) {
 501                 name_to_value(&brcm_dr_mode_to_name[0],
 502                               ARRAY_SIZE(brcm_dr_mode_to_name),
 503                         mode, &priv->ini.supported_port_modes);
 504         }
 505         /* Default port_mode to supported port_modes */
 506         priv->ini.port_mode = priv->ini.supported_port_modes;
 507
 508         if (of_property_read_bool(dn, "brcm,has-xhci"))
 509                 priv->has_xhci = true;
 510         if (of_property_read_bool(dn, "brcm,has-eohci"))
 511                 priv->has_eohci = true;
 512
 513         for (x = 0; x < BRCM_REGS_MAX; x++) {
 514                 if (info->required_regs[x] >= BRCM_REGS_MAX)
 515                         break;
 516
 517                 err = brcm_usb_get_regs(pdev, info->required_regs[x],
 518                                         &priv->ini, false);
 519                 if (err)
 520                         return -EINVAL;
 521         }
 522         if (info->optional_reg) {
 523                 err = brcm_usb_get_regs(pdev, info->optional_reg,
 524                                         &priv->ini, true);
 525                 if (err)
 526                         return -EINVAL;
 527         }
 528
 529         err = brcm_usb_phy_dvr_init(pdev, priv, dn);
 530         if (err)
 531                 return err;
 532
 533         priv->pm_notifier.notifier_call = brcm_pm_notifier;
 534         register_pm_notifier(&priv->pm_notifier);
 535
 536         mutex_init(&priv->mutex);
 537
 538         /* make sure invert settings are correct */
 539         brcm_usb_init_ipp(&priv->ini);
 540
 541         /*
 542          * Create sysfs entries for mode.
 543          * Remove "dual_select" attribute if not in dual mode
 544          */
 545         if (priv->ini.supported_port_modes != USB_CTLR_MODE_DRD)
 546                 brcm_usb_phy_attrs[1] = NULL;
 547         err = sysfs_create_group(&dev->kobj, &brcm_usb_phy_group);
 548         if (err)
 549                 dev_warn(dev, "Error creating sysfs attributes\n");
 550
 551         /* Get piarbctl syscon if it exists */
 552         rmap = syscon_regmap_lookup_by_phandle(dev->of_node,
 553                                                  "syscon-piarbctl");
 554         if (IS_ERR(rmap))
 555                 rmap = syscon_regmap_lookup_by_phandle(dev->of_node,
 556                                                        "brcm,syscon-piarbctl");
 557         if (!IS_ERR(rmap))
 558                 priv->ini.syscon_piarbctl = rmap;
 559
 560         /* start with everything off */
 561         if (priv->has_xhci)
 562                 brcm_usb_uninit_xhci(&priv->ini);
 563         if (priv->has_eohci)
 564                 brcm_usb_uninit_eohci(&priv->ini);
 565         brcm_usb_uninit_common(&priv->ini);
 566         clk_disable_unprepare(priv->usb_20_clk);
 567         clk_disable_unprepare(priv->usb_30_clk);
 568
 569         phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
 570
 571         return PTR_ERR_OR_ZERO(phy_provider);
 572 }
 573
 574 static void brcm_usb_phy_remove(struct platform_device *pdev)
 575 {
 576         struct brcm_usb_phy_data *priv = dev_get_drvdata(&pdev->dev);
 577
 578         sysfs_remove_group(&pdev->dev.kobj, &brcm_usb_phy_group);
 579         unregister_pm_notifier(&priv->pm_notifier);
 580 }
 581
 582 #ifdef CONFIG_PM_SLEEP
 583 static int brcm_usb_phy_suspend(struct device *dev)
 584 {
 585         struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 586
 587         if (priv->init_count) {
 588                 dev_dbg(dev, "SUSPEND\n");
 589                 priv->ini.wake_enabled = device_may_wakeup(dev);
 590                 if (priv->phys[BRCM_USB_PHY_3_0].inited)
 591                         brcm_usb_uninit_xhci(&priv->ini);
 592                 if (priv->phys[BRCM_USB_PHY_2_0].inited)
 593                         brcm_usb_uninit_eohci(&priv->ini);
 594                 brcm_usb_uninit_common(&priv->ini);
 595
 596                 /*
 597                  * Handle the clocks unless needed for wake. This has
 598                  * to work for both older XHCI->3.0-clks, EOHCI->2.0-clks
 599                  * and newer XHCI->2.0-clks/3.0-clks.
 600                  */
 601
 602                 if (!priv->ini.wake_enabled) {
 603                         if (priv->phys[BRCM_USB_PHY_3_0].inited)
 604                                 clk_disable_unprepare(priv->usb_30_clk);
 605                         if (priv->phys[BRCM_USB_PHY_2_0].inited ||
 606                             !priv->has_eohci)
 607                                 clk_disable_unprepare(priv->usb_20_clk);
 608                 }
 609                 if (priv->wake_irq >= 0)
 610                         enable_irq_wake(priv->wake_irq);
 611         }
 612         return 0;
 613 }
 614
 615 static int brcm_usb_phy_resume(struct device *dev)
 616 {
 617         struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 618
 619         if (!priv->ini.wake_enabled) {
 620                 clk_prepare_enable(priv->usb_20_clk);
 621                 clk_prepare_enable(priv->usb_30_clk);
 622         }
 623         brcm_usb_init_ipp(&priv->ini);
 624
 625         /*
 626          * Initialize anything that was previously initialized.
 627          * Uninitialize anything that wasn't previously initialized.
 628          */
 629         if (priv->init_count) {
 630                 dev_dbg(dev, "RESUME\n");
 631                 if (priv->wake_irq >= 0)
 632                         disable_irq_wake(priv->wake_irq);
 633                 brcm_usb_init_common(&priv->ini);
 634                 if (priv->phys[BRCM_USB_PHY_2_0].inited) {
 635                         brcm_usb_init_eohci(&priv->ini);
 636                 } else if (priv->has_eohci) {
 637                         brcm_usb_uninit_eohci(&priv->ini);
 638                         clk_disable_unprepare(priv->usb_20_clk);
 639                 }
 640                 if (priv->phys[BRCM_USB_PHY_3_0].inited) {
 641                         brcm_usb_init_xhci(&priv->ini);
 642                 } else if (priv->has_xhci) {
 643                         brcm_usb_uninit_xhci(&priv->ini);
 644                         clk_disable_unprepare(priv->usb_30_clk);
 645                         if (!priv->has_eohci)
 646                                 clk_disable_unprepare(priv->usb_20_clk);
 647                 }
 648         } else {
 649                 if (priv->has_xhci)
 650                         brcm_usb_uninit_xhci(&priv->ini);
 651                 if (priv->has_eohci)
 652                         brcm_usb_uninit_eohci(&priv->ini);
 653                 brcm_usb_uninit_common(&priv->ini);
 654                 clk_disable_unprepare(priv->usb_20_clk);
 655                 clk_disable_unprepare(priv->usb_30_clk);
 656         }
 657         priv->ini.wake_enabled = false;
 658         return 0;
 659 }
 660 #endif /* CONFIG_PM_SLEEP */
 661
 662 static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
 663         SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
 664 };
 665
 666 MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);
 667
 668 static struct platform_driver brcm_usb_driver = {
 669         .probe          = brcm_usb_phy_probe,
 670         .remove         = brcm_usb_phy_remove,
 671         .driver         = {
 672                 .name   = "brcmstb-usb-phy",
 673                 .pm = &brcm_usb_phy_pm_ops,
 674                 .of_match_table = brcm_usb_dt_ids,
 675         },
 676 };
 677
 678 module_platform_driver(brcm_usb_driver);
 679
 680 MODULE_ALIAS("platform:brcmstb-usb-phy");
 681 MODULE_AUTHOR("Al Cooper <acooper@broadcom.com>");
 682 MODULE_DESCRIPTION("BRCM USB PHY driver");
 683 MODULE_LICENSE("GPL v2");