drivers/usb/chipidea/ci_hdrc_imx.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2012 Freescale Semiconductor, Inc.
   4  * Copyright (C) 2012 Marek Vasut <marex@denx.de>
   5  * on behalf of DENX Software Engineering GmbH
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/of_platform.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/pm_runtime.h>
  12 #include <linux/usb/chipidea.h>
  13 #include <linux/usb/of.h>
  14 #include <linux/clk.h>
  15 #include <linux/pinctrl/consumer.h>
  16 #include <linux/pm_qos.h>
  17
  18 #include "ci.h"
  19 #include "ci_hdrc_imx.h"
  20
  21 struct ci_hdrc_imx_platform_flag {
  22         unsigned int flags;
  23 };
  24
  25 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
  26         .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
  27                 CI_HDRC_DISABLE_STREAMING,
  28 };
  29
  30 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
  31         .flags = CI_HDRC_DISABLE_STREAMING,
  32 };
  33
  34 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
  35         .flags = CI_HDRC_IMX28_WRITE_FIX |
  36                 CI_HDRC_TURN_VBUS_EARLY_ON |
  37                 CI_HDRC_DISABLE_STREAMING,
  38 };
  39
  40 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
  41         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  42                 CI_HDRC_TURN_VBUS_EARLY_ON |
  43                 CI_HDRC_DISABLE_STREAMING,
  44 };
  45
  46 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
  47         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  48                 CI_HDRC_TURN_VBUS_EARLY_ON |
  49                 CI_HDRC_DISABLE_HOST_STREAMING,
  50 };
  51
  52 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
  53         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  54                 CI_HDRC_TURN_VBUS_EARLY_ON |
  55                 CI_HDRC_DISABLE_HOST_STREAMING,
  56 };
  57
  58 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
  59         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  60                 CI_HDRC_TURN_VBUS_EARLY_ON,
  61 };
  62
  63 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
  64         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
  65 };
  66
  67 static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
  68         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  69                 CI_HDRC_PMQOS,
  70 };
  71
  72 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
  73         { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
  74         { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
  75         { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
  76         { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
  77         { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
  78         { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
  79         { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
  80         { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
  81         { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
  82         { /* sentinel */ }
  83 };
  84 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
  85
  86 struct ci_hdrc_imx_data {
  87         struct usb_phy *phy;
  88         struct platform_device *ci_pdev;
  89         struct clk *clk;
  90         struct imx_usbmisc_data *usbmisc_data;
  91         bool supports_runtime_pm;
  92         bool override_phy_control;
  93         bool in_lpm;
  94         struct pinctrl *pinctrl;
  95         struct pinctrl_state *pinctrl_hsic_active;
  96         struct regulator *hsic_pad_regulator;
  97         /* SoC before i.mx6 (except imx23/imx28) needs three clks */
  98         bool need_three_clks;
  99         struct clk *clk_ipg;
 100         struct clk *clk_ahb;
 101         struct clk *clk_per;
 102         /* --------------------------------- */
 103         struct pm_qos_request pm_qos_req;
 104         const struct ci_hdrc_imx_platform_flag *plat_data;
 105 };
 106
 107 /* Common functions shared by usbmisc drivers */
 108
 109 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 110 {
 111         struct platform_device *misc_pdev;
 112         struct device_node *np = dev->of_node;
 113         struct of_phandle_args args;
 114         struct imx_usbmisc_data *data;
 115         int ret;
 116
 117         /*
 118          * In case the fsl,usbmisc property is not present this device doesn't
 119          * need usbmisc. Return NULL (which is no error here)
 120          */
 121         if (!of_get_property(np, "fsl,usbmisc", NULL))
 122                 return NULL;
 123
 124         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 125         if (!data)
 126                 return ERR_PTR(-ENOMEM);
 127
 128         ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
 129                                         0, &args);
 130         if (ret) {
 131                 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
 132                         ret);
 133                 return ERR_PTR(ret);
 134         }
 135
 136         data->index = args.args[0];
 137
 138         misc_pdev = of_find_device_by_node(args.np);
 139         of_node_put(args.np);
 140
 141         if (!misc_pdev || !platform_get_drvdata(misc_pdev))
 142                 return ERR_PTR(-EPROBE_DEFER);
 143
 144         data->dev = &misc_pdev->dev;
 145
 146         /*
 147          * Check the various over current related properties. If over current
 148          * detection is disabled we're not interested in the polarity.
 149          */
 150         if (of_find_property(np, "disable-over-current", NULL)) {
 151                 data->disable_oc = 1;
 152         } else if (of_find_property(np, "over-current-active-high", NULL)) {
 153                 data->oc_pol_active_low = 0;
 154                 data->oc_pol_configured = 1;
 155         } else if (of_find_property(np, "over-current-active-low", NULL)) {
 156                 data->oc_pol_active_low = 1;
 157                 data->oc_pol_configured = 1;
 158         } else {
 159                 dev_warn(dev, "No over current polarity defined\n");
 160         }
 161
 162         data->pwr_pol = of_property_read_bool(np, "power-active-high");
 163         data->evdo = of_property_read_bool(np, "external-vbus-divider");
 164
 165         if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
 166                 data->ulpi = 1;
 167
 168         return data;
 169 }
 170
 171 /* End of common functions shared by usbmisc drivers*/
 172 static int imx_get_clks(struct device *dev)
 173 {
 174         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 175         int ret = 0;
 176
 177         data->clk_ipg = devm_clk_get(dev, "ipg");
 178         if (IS_ERR(data->clk_ipg)) {
 179                 /* If the platform only needs one clocks */
 180                 data->clk = devm_clk_get(dev, NULL);
 181                 if (IS_ERR(data->clk)) {
 182                         ret = PTR_ERR(data->clk);
 183                         dev_err(dev,
 184                                 "Failed to get clks, err=%ld,%ld\n",
 185                                 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
 186                         return ret;
 187                 }
 188                 return ret;
 189         }
 190
 191         data->clk_ahb = devm_clk_get(dev, "ahb");
 192         if (IS_ERR(data->clk_ahb)) {
 193                 ret = PTR_ERR(data->clk_ahb);
 194                 dev_err(dev,
 195                         "Failed to get ahb clock, err=%d\n", ret);
 196                 return ret;
 197         }
 198
 199         data->clk_per = devm_clk_get(dev, "per");
 200         if (IS_ERR(data->clk_per)) {
 201                 ret = PTR_ERR(data->clk_per);
 202                 dev_err(dev,
 203                         "Failed to get per clock, err=%d\n", ret);
 204                 return ret;
 205         }
 206
 207         data->need_three_clks = true;
 208         return ret;
 209 }
 210
 211 static int imx_prepare_enable_clks(struct device *dev)
 212 {
 213         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 214         int ret = 0;
 215
 216         if (data->need_three_clks) {
 217                 ret = clk_prepare_enable(data->clk_ipg);
 218                 if (ret) {
 219                         dev_err(dev,
 220                                 "Failed to prepare/enable ipg clk, err=%d\n",
 221                                 ret);
 222                         return ret;
 223                 }
 224
 225                 ret = clk_prepare_enable(data->clk_ahb);
 226                 if (ret) {
 227                         dev_err(dev,
 228                                 "Failed to prepare/enable ahb clk, err=%d\n",
 229                                 ret);
 230                         clk_disable_unprepare(data->clk_ipg);
 231                         return ret;
 232                 }
 233
 234                 ret = clk_prepare_enable(data->clk_per);
 235                 if (ret) {
 236                         dev_err(dev,
 237                                 "Failed to prepare/enable per clk, err=%d\n",
 238                                 ret);
 239                         clk_disable_unprepare(data->clk_ahb);
 240                         clk_disable_unprepare(data->clk_ipg);
 241                         return ret;
 242                 }
 243         } else {
 244                 ret = clk_prepare_enable(data->clk);
 245                 if (ret) {
 246                         dev_err(dev,
 247                                 "Failed to prepare/enable clk, err=%d\n",
 248                                 ret);
 249                         return ret;
 250                 }
 251         }
 252
 253         return ret;
 254 }
 255
 256 static void imx_disable_unprepare_clks(struct device *dev)
 257 {
 258         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 259
 260         if (data->need_three_clks) {
 261                 clk_disable_unprepare(data->clk_per);
 262                 clk_disable_unprepare(data->clk_ahb);
 263                 clk_disable_unprepare(data->clk_ipg);
 264         } else {
 265                 clk_disable_unprepare(data->clk);
 266         }
 267 }
 268
 269 static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
 270 {
 271         struct device *dev = ci->dev->parent;
 272         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 273         int ret = 0;
 274
 275         switch (event) {
 276         case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
 277                 if (data->pinctrl) {
 278                         ret = pinctrl_select_state(data->pinctrl,
 279                                         data->pinctrl_hsic_active);
 280                         if (ret)
 281                                 dev_err(dev,
 282                                         "hsic_active select failed, err=%d\n",
 283                                         ret);
 284                 }
 285                 break;
 286         case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
 287                 ret = imx_usbmisc_hsic_set_connect(data->usbmisc_data);
 288                 if (ret)
 289                         dev_err(dev,
 290                                 "hsic_set_connect failed, err=%d\n", ret);
 291                 break;
 292         default:
 293                 break;
 294         }
 295
 296         return ret;
 297 }
 298
 299 static int ci_hdrc_imx_probe(struct platform_device *pdev)
 300 {
 301         struct ci_hdrc_imx_data *data;
 302         struct ci_hdrc_platform_data pdata = {
 303                 .name           = dev_name(&pdev->dev),
 304                 .capoffset      = DEF_CAPOFFSET,
 305                 .notify_event   = ci_hdrc_imx_notify_event,
 306         };
 307         int ret;
 308         const struct of_device_id *of_id;
 309         const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
 310         struct device_node *np = pdev->dev.of_node;
 311         struct device *dev = &pdev->dev;
 312
 313         of_id = of_match_device(ci_hdrc_imx_dt_ids, dev);
 314         if (!of_id)
 315                 return -ENODEV;
 316
 317         imx_platform_flag = of_id->data;
 318
 319         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 320         if (!data)
 321                 return -ENOMEM;
 322
 323         data->plat_data = imx_platform_flag;
 324         pdata.flags |= imx_platform_flag->flags;
 325         platform_set_drvdata(pdev, data);
 326         data->usbmisc_data = usbmisc_get_init_data(dev);
 327         if (IS_ERR(data->usbmisc_data))
 328                 return PTR_ERR(data->usbmisc_data);
 329
 330         if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
 331                 && data->usbmisc_data) {
 332                 pdata.flags |= CI_HDRC_IMX_IS_HSIC;
 333                 data->usbmisc_data->hsic = 1;
 334                 data->pinctrl = devm_pinctrl_get(dev);
 335                 if (PTR_ERR(data->pinctrl) == -ENODEV)
 336                         data->pinctrl = NULL;
 337                 else if (IS_ERR(data->pinctrl)) {
 338                         if (PTR_ERR(data->pinctrl) != -EPROBE_DEFER)
 339                                 dev_err(dev, "pinctrl get failed, err=%ld\n",
 340                                         PTR_ERR(data->pinctrl));
 341                         return PTR_ERR(data->pinctrl);
 342                 }
 343
 344                 data->hsic_pad_regulator =
 345                                 devm_regulator_get_optional(dev, "hsic");
 346                 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
 347                         /* no pad regualator is needed */
 348                         data->hsic_pad_regulator = NULL;
 349                 } else if (IS_ERR(data->hsic_pad_regulator)) {
 350                         if (PTR_ERR(data->hsic_pad_regulator) != -EPROBE_DEFER)
 351                                 dev_err(dev,
 352                                         "Get HSIC pad regulator error: %ld\n",
 353                                         PTR_ERR(data->hsic_pad_regulator));
 354                         return PTR_ERR(data->hsic_pad_regulator);
 355                 }
 356
 357                 if (data->hsic_pad_regulator) {
 358                         ret = regulator_enable(data->hsic_pad_regulator);
 359                         if (ret) {
 360                                 dev_err(dev,
 361                                         "Failed to enable HSIC pad regulator\n");
 362                                 return ret;
 363                         }
 364                 }
 365         }
 366
 367         /* HSIC pinctrl handling */
 368         if (data->pinctrl) {
 369                 struct pinctrl_state *pinctrl_hsic_idle;
 370
 371                 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
 372                 if (IS_ERR(pinctrl_hsic_idle)) {
 373                         dev_err(dev,
 374                                 "pinctrl_hsic_idle lookup failed, err=%ld\n",
 375                                         PTR_ERR(pinctrl_hsic_idle));
 376                         return PTR_ERR(pinctrl_hsic_idle);
 377                 }
 378
 379                 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
 380                 if (ret) {
 381                         dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
 382                         return ret;
 383                 }
 384
 385                 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
 386                                                                 "active");
 387                 if (IS_ERR(data->pinctrl_hsic_active)) {
 388                         dev_err(dev,
 389                                 "pinctrl_hsic_active lookup failed, err=%ld\n",
 390                                         PTR_ERR(data->pinctrl_hsic_active));
 391                         return PTR_ERR(data->pinctrl_hsic_active);
 392                 }
 393         }
 394
 395         if (pdata.flags & CI_HDRC_PMQOS)
 396                 pm_qos_add_request(&data->pm_qos_req,
 397                         PM_QOS_CPU_DMA_LATENCY, 0);
 398
 399         ret = imx_get_clks(dev);
 400         if (ret)
 401                 goto disable_hsic_regulator;
 402
 403         ret = imx_prepare_enable_clks(dev);
 404         if (ret)
 405                 goto disable_hsic_regulator;
 406
 407         data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 408         if (IS_ERR(data->phy)) {
 409                 ret = PTR_ERR(data->phy);
 410                 /* Return -EINVAL if no usbphy is available */
 411                 if (ret == -ENODEV)
 412                         data->phy = NULL;
 413                 else
 414                         goto err_clk;
 415         }
 416
 417         pdata.usb_phy = data->phy;
 418
 419         if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
 420              of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
 421             of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
 422                 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
 423                 data->override_phy_control = true;
 424                 usb_phy_init(pdata.usb_phy);
 425         }
 426
 427         if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
 428                 data->supports_runtime_pm = true;
 429
 430         ret = imx_usbmisc_init(data->usbmisc_data);
 431         if (ret) {
 432                 dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
 433                 goto err_clk;
 434         }
 435
 436         data->ci_pdev = ci_hdrc_add_device(dev,
 437                                 pdev->resource, pdev->num_resources,
 438                                 &pdata);
 439         if (IS_ERR(data->ci_pdev)) {
 440                 ret = PTR_ERR(data->ci_pdev);
 441                 if (ret != -EPROBE_DEFER)
 442                         dev_err(dev, "ci_hdrc_add_device failed, err=%d\n",
 443                                         ret);
 444                 goto err_clk;
 445         }
 446
 447         if (data->usbmisc_data) {
 448                 if (!IS_ERR(pdata.id_extcon.edev) ||
 449                     of_property_read_bool(np, "usb-role-switch"))
 450                         data->usbmisc_data->ext_id = 1;
 451
 452                 if (!IS_ERR(pdata.vbus_extcon.edev) ||
 453                     of_property_read_bool(np, "usb-role-switch"))
 454                         data->usbmisc_data->ext_vbus = 1;
 455         }
 456
 457         ret = imx_usbmisc_init_post(data->usbmisc_data);
 458         if (ret) {
 459                 dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
 460                 goto disable_device;
 461         }
 462
 463         if (data->supports_runtime_pm) {
 464                 pm_runtime_set_active(dev);
 465                 pm_runtime_enable(dev);
 466         }
 467
 468         device_set_wakeup_capable(dev, true);
 469
 470         return 0;
 471
 472 disable_device:
 473         ci_hdrc_remove_device(data->ci_pdev);
 474 err_clk:
 475         imx_disable_unprepare_clks(dev);
 476 disable_hsic_regulator:
 477         if (data->hsic_pad_regulator)
 478                 /* don't overwrite original ret (cf. EPROBE_DEFER) */
 479                 regulator_disable(data->hsic_pad_regulator);
 480         if (pdata.flags & CI_HDRC_PMQOS)
 481                 pm_qos_remove_request(&data->pm_qos_req);
 482         data->ci_pdev = NULL;
 483         return ret;
 484 }
 485
 486 static int ci_hdrc_imx_remove(struct platform_device *pdev)
 487 {
 488         struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
 489
 490         if (data->supports_runtime_pm) {
 491                 pm_runtime_get_sync(&pdev->dev);
 492                 pm_runtime_disable(&pdev->dev);
 493                 pm_runtime_put_noidle(&pdev->dev);
 494         }
 495         if (data->ci_pdev)
 496                 ci_hdrc_remove_device(data->ci_pdev);
 497         if (data->override_phy_control)
 498                 usb_phy_shutdown(data->phy);
 499         if (data->ci_pdev) {
 500                 imx_disable_unprepare_clks(&pdev->dev);
 501                 if (data->plat_data->flags & CI_HDRC_PMQOS)
 502                         pm_qos_remove_request(&data->pm_qos_req);
 503                 if (data->hsic_pad_regulator)
 504                         regulator_disable(data->hsic_pad_regulator);
 505         }
 506
 507         return 0;
 508 }
 509
 510 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
 511 {
 512         ci_hdrc_imx_remove(pdev);
 513 }
 514
 515 static int __maybe_unused imx_controller_suspend(struct device *dev)
 516 {
 517         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 518         int ret = 0;
 519
 520         dev_dbg(dev, "at %s\n", __func__);
 521
 522         ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, false);
 523         if (ret) {
 524                 dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
 525                 return ret;
 526         }
 527
 528         imx_disable_unprepare_clks(dev);
 529         if (data->plat_data->flags & CI_HDRC_PMQOS)
 530                 pm_qos_remove_request(&data->pm_qos_req);
 531
 532         data->in_lpm = true;
 533
 534         return 0;
 535 }
 536
 537 static int __maybe_unused imx_controller_resume(struct device *dev)
 538 {
 539         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 540         int ret = 0;
 541
 542         dev_dbg(dev, "at %s\n", __func__);
 543
 544         if (!data->in_lpm) {
 545                 WARN_ON(1);
 546                 return 0;
 547         }
 548
 549         if (data->plat_data->flags & CI_HDRC_PMQOS)
 550                 pm_qos_add_request(&data->pm_qos_req,
 551                         PM_QOS_CPU_DMA_LATENCY, 0);
 552
 553         ret = imx_prepare_enable_clks(dev);
 554         if (ret)
 555                 return ret;
 556
 557         data->in_lpm = false;
 558
 559         ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
 560         if (ret) {
 561                 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 562                 goto clk_disable;
 563         }
 564
 565         ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, true);
 566         if (ret) {
 567                 dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
 568                 goto hsic_set_clk_fail;
 569         }
 570
 571         return 0;
 572
 573 hsic_set_clk_fail:
 574         imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 575 clk_disable:
 576         imx_disable_unprepare_clks(dev);
 577         return ret;
 578 }
 579
 580 static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev)
 581 {
 582         int ret;
 583
 584         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 585
 586         if (data->in_lpm)
 587                 /* The core's suspend doesn't run */
 588                 return 0;
 589
 590         if (device_may_wakeup(dev)) {
 591                 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 592                 if (ret) {
 593                         dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
 594                                         ret);
 595                         return ret;
 596                 }
 597         }
 598
 599         return imx_controller_suspend(dev);
 600 }
 601
 602 static int __maybe_unused ci_hdrc_imx_resume(struct device *dev)
 603 {
 604         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 605         int ret;
 606
 607         ret = imx_controller_resume(dev);
 608         if (!ret && data->supports_runtime_pm) {
 609                 pm_runtime_disable(dev);
 610                 pm_runtime_set_active(dev);
 611                 pm_runtime_enable(dev);
 612         }
 613
 614         return ret;
 615 }
 616
 617 static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev)
 618 {
 619         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 620         int ret;
 621
 622         if (data->in_lpm) {
 623                 WARN_ON(1);
 624                 return 0;
 625         }
 626
 627         ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 628         if (ret) {
 629                 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 630                 return ret;
 631         }
 632
 633         return imx_controller_suspend(dev);
 634 }
 635
 636 static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev)
 637 {
 638         return imx_controller_resume(dev);
 639 }
 640
 641 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 642         SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 643         SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
 644                         ci_hdrc_imx_runtime_resume, NULL)
 645 };
 646 static struct platform_driver ci_hdrc_imx_driver = {
 647         .probe = ci_hdrc_imx_probe,
 648         .remove = ci_hdrc_imx_remove,
 649         .shutdown = ci_hdrc_imx_shutdown,
 650         .driver = {
 651                 .name = "imx_usb",
 652                 .of_match_table = ci_hdrc_imx_dt_ids,
 653                 .pm = &ci_hdrc_imx_pm_ops,
 654          },
 655 };
 656
 657 module_platform_driver(ci_hdrc_imx_driver);
 658
 659 MODULE_ALIAS("platform:imx-usb");
 660 MODULE_LICENSE("GPL");
 661 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
 662 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
 663 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");