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.h>
  10 #include <linux/of_platform.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/pm_runtime.h>
  13 #include <linux/usb/chipidea.h>
  14 #include <linux/usb/of.h>
  15 #include <linux/clk.h>
  16 #include <linux/pinctrl/consumer.h>
  17 #include <linux/pm_qos.h>
  18
  19 #include "ci.h"
  20 #include "ci_hdrc_imx.h"
  21
  22 struct ci_hdrc_imx_platform_flag {
  23         unsigned int flags;
  24 };
  25
  26 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
  27         .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
  28                 CI_HDRC_DISABLE_STREAMING,
  29 };
  30
  31 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
  32         .flags = CI_HDRC_DISABLE_STREAMING,
  33 };
  34
  35 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
  36         .flags = CI_HDRC_IMX28_WRITE_FIX |
  37                 CI_HDRC_TURN_VBUS_EARLY_ON |
  38                 CI_HDRC_DISABLE_STREAMING,
  39 };
  40
  41 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
  42         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  43                 CI_HDRC_TURN_VBUS_EARLY_ON |
  44                 CI_HDRC_DISABLE_STREAMING,
  45 };
  46
  47 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
  48         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  49                 CI_HDRC_TURN_VBUS_EARLY_ON |
  50                 CI_HDRC_DISABLE_HOST_STREAMING,
  51 };
  52
  53 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
  54         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  55                 CI_HDRC_TURN_VBUS_EARLY_ON |
  56                 CI_HDRC_DISABLE_HOST_STREAMING,
  57 };
  58
  59 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
  60         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  61                 CI_HDRC_TURN_VBUS_EARLY_ON |
  62                 CI_HDRC_DISABLE_DEVICE_STREAMING,
  63 };
  64
  65 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
  66         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
  67 };
  68
  69 static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
  70         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  71                 CI_HDRC_HAS_PORTSC_PEC_MISSED |
  72                 CI_HDRC_PMQOS,
  73 };
  74
  75 static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
  76         .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
  77                 CI_HDRC_HAS_PORTSC_PEC_MISSED,
  78 };
  79
  80 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
  81         { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
  82         { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
  83         { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
  84         { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
  85         { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
  86         { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
  87         { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
  88         { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
  89         { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
  90         { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
  91         { /* sentinel */ }
  92 };
  93 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
  94
  95 struct ci_hdrc_imx_data {
  96         struct usb_phy *phy;
  97         struct platform_device *ci_pdev;
  98         struct clk *clk;
  99         struct clk *clk_wakeup;
 100         struct imx_usbmisc_data *usbmisc_data;
 101         bool supports_runtime_pm;
 102         bool override_phy_control;
 103         bool in_lpm;
 104         struct pinctrl *pinctrl;
 105         struct pinctrl_state *pinctrl_hsic_active;
 106         struct regulator *hsic_pad_regulator;
 107         /* SoC before i.mx6 (except imx23/imx28) needs three clks */
 108         bool need_three_clks;
 109         struct clk *clk_ipg;
 110         struct clk *clk_ahb;
 111         struct clk *clk_per;
 112         /* --------------------------------- */
 113         struct pm_qos_request pm_qos_req;
 114         const struct ci_hdrc_imx_platform_flag *plat_data;
 115 };
 116
 117 /* Common functions shared by usbmisc drivers */
 118
 119 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 120 {
 121         struct platform_device *misc_pdev;
 122         struct device_node *np = dev->of_node;
 123         struct of_phandle_args args;
 124         struct imx_usbmisc_data *data;
 125         int ret;
 126
 127         /*
 128          * In case the fsl,usbmisc property is not present this device doesn't
 129          * need usbmisc. Return NULL (which is no error here)
 130          */
 131         if (!of_property_present(np, "fsl,usbmisc"))
 132                 return NULL;
 133
 134         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 135         if (!data)
 136                 return ERR_PTR(-ENOMEM);
 137
 138         ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
 139                                         0, &args);
 140         if (ret) {
 141                 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
 142                         ret);
 143                 return ERR_PTR(ret);
 144         }
 145
 146         data->index = args.args[0];
 147
 148         misc_pdev = of_find_device_by_node(args.np);
 149         of_node_put(args.np);
 150
 151         if (!misc_pdev)
 152                 return ERR_PTR(-EPROBE_DEFER);
 153
 154         if (!platform_get_drvdata(misc_pdev)) {
 155                 put_device(&misc_pdev->dev);
 156                 return ERR_PTR(-EPROBE_DEFER);
 157         }
 158         data->dev = &misc_pdev->dev;
 159
 160         /*
 161          * Check the various over current related properties. If over current
 162          * detection is disabled we're not interested in the polarity.
 163          */
 164         if (of_property_read_bool(np, "disable-over-current")) {
 165                 data->disable_oc = 1;
 166         } else if (of_property_read_bool(np, "over-current-active-high")) {
 167                 data->oc_pol_active_low = 0;
 168                 data->oc_pol_configured = 1;
 169         } else if (of_property_read_bool(np, "over-current-active-low")) {
 170                 data->oc_pol_active_low = 1;
 171                 data->oc_pol_configured = 1;
 172         } else {
 173                 dev_warn(dev, "No over current polarity defined\n");
 174         }
 175
 176         data->pwr_pol = of_property_read_bool(np, "power-active-high");
 177         data->evdo = of_property_read_bool(np, "external-vbus-divider");
 178
 179         if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
 180                 data->ulpi = 1;
 181
 182         if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control",
 183                         &data->emp_curr_control))
 184                 data->emp_curr_control = -1;
 185         if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
 186                         &data->dc_vol_level_adjust))
 187                 data->dc_vol_level_adjust = -1;
 188         if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust",
 189                         &data->rise_fall_time_adjust))
 190                 data->rise_fall_time_adjust = -1;
 191
 192         return data;
 193 }
 194
 195 /* End of common functions shared by usbmisc drivers*/
 196 static int imx_get_clks(struct device *dev)
 197 {
 198         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 199         int ret = 0;
 200
 201         data->clk_ipg = devm_clk_get(dev, "ipg");
 202         if (IS_ERR(data->clk_ipg)) {
 203                 /* If the platform only needs one primary clock */
 204                 data->clk = devm_clk_get(dev, NULL);
 205                 if (IS_ERR(data->clk)) {
 206                         ret = PTR_ERR(data->clk);
 207                         dev_err(dev,
 208                                 "Failed to get clks, err=%ld,%ld\n",
 209                                 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
 210                         return ret;
 211                 }
 212                 /* Get wakeup clock. Not all of the platforms need to
 213                  * handle this clock. So make it optional.
 214                  */
 215                 data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup");
 216                 if (IS_ERR(data->clk_wakeup))
 217                         ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup),
 218                                         "Failed to get wakeup clk\n");
 219                 return ret;
 220         }
 221
 222         data->clk_ahb = devm_clk_get(dev, "ahb");
 223         if (IS_ERR(data->clk_ahb)) {
 224                 ret = PTR_ERR(data->clk_ahb);
 225                 dev_err(dev,
 226                         "Failed to get ahb clock, err=%d\n", ret);
 227                 return ret;
 228         }
 229
 230         data->clk_per = devm_clk_get(dev, "per");
 231         if (IS_ERR(data->clk_per)) {
 232                 ret = PTR_ERR(data->clk_per);
 233                 dev_err(dev,
 234                         "Failed to get per clock, err=%d\n", ret);
 235                 return ret;
 236         }
 237
 238         data->need_three_clks = true;
 239         return ret;
 240 }
 241
 242 static int imx_prepare_enable_clks(struct device *dev)
 243 {
 244         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 245         int ret = 0;
 246
 247         if (data->need_three_clks) {
 248                 ret = clk_prepare_enable(data->clk_ipg);
 249                 if (ret) {
 250                         dev_err(dev,
 251                                 "Failed to prepare/enable ipg clk, err=%d\n",
 252                                 ret);
 253                         return ret;
 254                 }
 255
 256                 ret = clk_prepare_enable(data->clk_ahb);
 257                 if (ret) {
 258                         dev_err(dev,
 259                                 "Failed to prepare/enable ahb clk, err=%d\n",
 260                                 ret);
 261                         clk_disable_unprepare(data->clk_ipg);
 262                         return ret;
 263                 }
 264
 265                 ret = clk_prepare_enable(data->clk_per);
 266                 if (ret) {
 267                         dev_err(dev,
 268                                 "Failed to prepare/enable per clk, err=%d\n",
 269                                 ret);
 270                         clk_disable_unprepare(data->clk_ahb);
 271                         clk_disable_unprepare(data->clk_ipg);
 272                         return ret;
 273                 }
 274         } else {
 275                 ret = clk_prepare_enable(data->clk);
 276                 if (ret) {
 277                         dev_err(dev,
 278                                 "Failed to prepare/enable clk, err=%d\n",
 279                                 ret);
 280                         return ret;
 281                 }
 282         }
 283
 284         return ret;
 285 }
 286
 287 static void imx_disable_unprepare_clks(struct device *dev)
 288 {
 289         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 290
 291         if (data->need_three_clks) {
 292                 clk_disable_unprepare(data->clk_per);
 293                 clk_disable_unprepare(data->clk_ahb);
 294                 clk_disable_unprepare(data->clk_ipg);
 295         } else {
 296                 clk_disable_unprepare(data->clk);
 297         }
 298 }
 299
 300 static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
 301 {
 302         struct device *dev = ci->dev->parent;
 303         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 304         int ret = 0;
 305         struct imx_usbmisc_data *mdata = data->usbmisc_data;
 306
 307         switch (event) {
 308         case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
 309                 if (data->pinctrl) {
 310                         ret = pinctrl_select_state(data->pinctrl,
 311                                         data->pinctrl_hsic_active);
 312                         if (ret)
 313                                 dev_err(dev,
 314                                         "hsic_active select failed, err=%d\n",
 315                                         ret);
 316                 }
 317                 break;
 318         case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
 319                 ret = imx_usbmisc_hsic_set_connect(mdata);
 320                 if (ret)
 321                         dev_err(dev,
 322                                 "hsic_set_connect failed, err=%d\n", ret);
 323                 break;
 324         case CI_HDRC_CONTROLLER_VBUS_EVENT:
 325                 if (ci->vbus_active)
 326                         ret = imx_usbmisc_charger_detection(mdata, true);
 327                 else
 328                         ret = imx_usbmisc_charger_detection(mdata, false);
 329                 if (ci->usb_phy)
 330                         schedule_work(&ci->usb_phy->chg_work);
 331                 break;
 332         default:
 333                 break;
 334         }
 335
 336         return ret;
 337 }
 338
 339 static int ci_hdrc_imx_probe(struct platform_device *pdev)
 340 {
 341         struct ci_hdrc_imx_data *data;
 342         struct ci_hdrc_platform_data pdata = {
 343                 .name           = dev_name(&pdev->dev),
 344                 .capoffset      = DEF_CAPOFFSET,
 345                 .flags          = CI_HDRC_HAS_SHORT_PKT_LIMIT,
 346                 .notify_event   = ci_hdrc_imx_notify_event,
 347         };
 348         int ret;
 349         const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
 350         struct device_node *np = pdev->dev.of_node;
 351         struct device *dev = &pdev->dev;
 352
 353         imx_platform_flag = of_device_get_match_data(&pdev->dev);
 354
 355         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 356         if (!data)
 357                 return -ENOMEM;
 358
 359         data->plat_data = imx_platform_flag;
 360         pdata.flags |= imx_platform_flag->flags;
 361         platform_set_drvdata(pdev, data);
 362         data->usbmisc_data = usbmisc_get_init_data(dev);
 363         if (IS_ERR(data->usbmisc_data))
 364                 return PTR_ERR(data->usbmisc_data);
 365
 366         if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
 367                 && data->usbmisc_data) {
 368                 pdata.flags |= CI_HDRC_IMX_IS_HSIC;
 369                 data->usbmisc_data->hsic = 1;
 370                 data->pinctrl = devm_pinctrl_get(dev);
 371                 if (PTR_ERR(data->pinctrl) == -ENODEV)
 372                         data->pinctrl = NULL;
 373                 else if (IS_ERR(data->pinctrl)) {
 374                         ret = dev_err_probe(dev, PTR_ERR(data->pinctrl),
 375                                              "pinctrl get failed\n");
 376                         goto err_put;
 377                 }
 378
 379                 data->hsic_pad_regulator =
 380                                 devm_regulator_get_optional(dev, "hsic");
 381                 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
 382                         /* no pad regulator is needed */
 383                         data->hsic_pad_regulator = NULL;
 384                 } else if (IS_ERR(data->hsic_pad_regulator)) {
 385                         ret = dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
 386                                              "Get HSIC pad regulator error\n");
 387                         goto err_put;
 388                 }
 389
 390                 if (data->hsic_pad_regulator) {
 391                         ret = regulator_enable(data->hsic_pad_regulator);
 392                         if (ret) {
 393                                 dev_err(dev,
 394                                         "Failed to enable HSIC pad regulator\n");
 395                                 goto err_put;
 396                         }
 397                 }
 398         }
 399
 400         /* HSIC pinctrl handling */
 401         if (data->pinctrl) {
 402                 struct pinctrl_state *pinctrl_hsic_idle;
 403
 404                 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
 405                 if (IS_ERR(pinctrl_hsic_idle)) {
 406                         dev_err(dev,
 407                                 "pinctrl_hsic_idle lookup failed, err=%ld\n",
 408                                         PTR_ERR(pinctrl_hsic_idle));
 409                         ret = PTR_ERR(pinctrl_hsic_idle);
 410                         goto err_put;
 411                 }
 412
 413                 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
 414                 if (ret) {
 415                         dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
 416                         goto err_put;
 417                 }
 418
 419                 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
 420                                                                 "active");
 421                 if (IS_ERR(data->pinctrl_hsic_active)) {
 422                         dev_err(dev,
 423                                 "pinctrl_hsic_active lookup failed, err=%ld\n",
 424                                         PTR_ERR(data->pinctrl_hsic_active));
 425                         ret = PTR_ERR(data->pinctrl_hsic_active);
 426                         goto err_put;
 427                 }
 428         }
 429
 430         if (pdata.flags & CI_HDRC_PMQOS)
 431                 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
 432
 433         ret = imx_get_clks(dev);
 434         if (ret)
 435                 goto disable_hsic_regulator;
 436
 437         ret = imx_prepare_enable_clks(dev);
 438         if (ret)
 439                 goto disable_hsic_regulator;
 440
 441         ret = clk_prepare_enable(data->clk_wakeup);
 442         if (ret)
 443                 goto err_wakeup_clk;
 444
 445         data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 446         if (IS_ERR(data->phy)) {
 447                 ret = PTR_ERR(data->phy);
 448                 if (ret != -ENODEV) {
 449                         dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n");
 450                         goto err_clk;
 451                 }
 452                 data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
 453                 if (IS_ERR(data->phy)) {
 454                         ret = PTR_ERR(data->phy);
 455                         if (ret == -ENODEV) {
 456                                 data->phy = NULL;
 457                         } else {
 458                                 dev_err_probe(dev, ret, "Failed to parse phys\n");
 459                                 goto err_clk;
 460                         }
 461                 }
 462         }
 463
 464         pdata.usb_phy = data->phy;
 465         if (data->usbmisc_data)
 466                 data->usbmisc_data->usb_phy = data->phy;
 467
 468         if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
 469              of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
 470             of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
 471                 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
 472                 data->override_phy_control = true;
 473                 usb_phy_init(pdata.usb_phy);
 474         }
 475
 476         if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
 477                 data->supports_runtime_pm = true;
 478
 479         ret = imx_usbmisc_init(data->usbmisc_data);
 480         if (ret) {
 481                 dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
 482                 goto err_clk;
 483         }
 484
 485         data->ci_pdev = ci_hdrc_add_device(dev,
 486                                 pdev->resource, pdev->num_resources,
 487                                 &pdata);
 488         if (IS_ERR(data->ci_pdev)) {
 489                 ret = PTR_ERR(data->ci_pdev);
 490                 dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
 491                 goto err_clk;
 492         }
 493
 494         if (data->usbmisc_data) {
 495                 if (!IS_ERR(pdata.id_extcon.edev) ||
 496                     of_property_read_bool(np, "usb-role-switch"))
 497                         data->usbmisc_data->ext_id = 1;
 498
 499                 if (!IS_ERR(pdata.vbus_extcon.edev) ||
 500                     of_property_read_bool(np, "usb-role-switch"))
 501                         data->usbmisc_data->ext_vbus = 1;
 502
 503                 /* usbmisc needs to know dr mode to choose wakeup setting */
 504                 data->usbmisc_data->available_role =
 505                         ci_hdrc_query_available_role(data->ci_pdev);
 506         }
 507
 508         ret = imx_usbmisc_init_post(data->usbmisc_data);
 509         if (ret) {
 510                 dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
 511                 goto disable_device;
 512         }
 513
 514         if (data->supports_runtime_pm) {
 515                 pm_runtime_set_active(dev);
 516                 pm_runtime_enable(dev);
 517         }
 518
 519         device_set_wakeup_capable(dev, true);
 520
 521         return 0;
 522
 523 disable_device:
 524         ci_hdrc_remove_device(data->ci_pdev);
 525 err_clk:
 526         clk_disable_unprepare(data->clk_wakeup);
 527 err_wakeup_clk:
 528         imx_disable_unprepare_clks(dev);
 529 disable_hsic_regulator:
 530         if (data->hsic_pad_regulator)
 531                 /* don't overwrite original ret (cf. EPROBE_DEFER) */
 532                 regulator_disable(data->hsic_pad_regulator);
 533         if (pdata.flags & CI_HDRC_PMQOS)
 534                 cpu_latency_qos_remove_request(&data->pm_qos_req);
 535         data->ci_pdev = NULL;
 536 err_put:
 537         put_device(data->usbmisc_data->dev);
 538         return ret;
 539 }
 540
 541 static void ci_hdrc_imx_remove(struct platform_device *pdev)
 542 {
 543         struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
 544
 545         if (data->supports_runtime_pm) {
 546                 pm_runtime_get_sync(&pdev->dev);
 547                 pm_runtime_disable(&pdev->dev);
 548                 pm_runtime_put_noidle(&pdev->dev);
 549         }
 550         if (data->ci_pdev)
 551                 ci_hdrc_remove_device(data->ci_pdev);
 552         if (data->override_phy_control)
 553                 usb_phy_shutdown(data->phy);
 554         if (data->ci_pdev) {
 555                 imx_disable_unprepare_clks(&pdev->dev);
 556                 clk_disable_unprepare(data->clk_wakeup);
 557                 if (data->plat_data->flags & CI_HDRC_PMQOS)
 558                         cpu_latency_qos_remove_request(&data->pm_qos_req);
 559                 if (data->hsic_pad_regulator)
 560                         regulator_disable(data->hsic_pad_regulator);
 561         }
 562         put_device(data->usbmisc_data->dev);
 563 }
 564
 565 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
 566 {
 567         ci_hdrc_imx_remove(pdev);
 568 }
 569
 570 static int imx_controller_suspend(struct device *dev,
 571                                                  pm_message_t msg)
 572 {
 573         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 574         int ret = 0;
 575
 576         dev_dbg(dev, "at %s\n", __func__);
 577
 578         ret = imx_usbmisc_suspend(data->usbmisc_data,
 579                                   PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
 580         if (ret) {
 581                 dev_err(dev,
 582                         "usbmisc suspend failed, ret=%d\n", ret);
 583                 return ret;
 584         }
 585
 586         imx_disable_unprepare_clks(dev);
 587         if (data->plat_data->flags & CI_HDRC_PMQOS)
 588                 cpu_latency_qos_remove_request(&data->pm_qos_req);
 589
 590         data->in_lpm = true;
 591
 592         return 0;
 593 }
 594
 595 static int imx_controller_resume(struct device *dev,
 596                                                 pm_message_t msg)
 597 {
 598         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 599         int ret = 0;
 600
 601         dev_dbg(dev, "at %s\n", __func__);
 602
 603         if (!data->in_lpm) {
 604                 WARN_ON(1);
 605                 return 0;
 606         }
 607
 608         if (data->plat_data->flags & CI_HDRC_PMQOS)
 609                 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
 610
 611         ret = imx_prepare_enable_clks(dev);
 612         if (ret)
 613                 return ret;
 614
 615         data->in_lpm = false;
 616
 617         ret = imx_usbmisc_resume(data->usbmisc_data,
 618                                  PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
 619         if (ret) {
 620                 dev_err(dev, "usbmisc resume failed, ret=%d\n", ret);
 621                 goto clk_disable;
 622         }
 623
 624         return 0;
 625
 626 clk_disable:
 627         imx_disable_unprepare_clks(dev);
 628         return ret;
 629 }
 630
 631 static int ci_hdrc_imx_suspend(struct device *dev)
 632 {
 633         int ret;
 634
 635         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 636
 637         if (data->in_lpm)
 638                 /* The core's suspend doesn't run */
 639                 return 0;
 640
 641         ret = imx_controller_suspend(dev, PMSG_SUSPEND);
 642         if (ret)
 643                 return ret;
 644
 645         pinctrl_pm_select_sleep_state(dev);
 646         return ret;
 647 }
 648
 649 static int ci_hdrc_imx_resume(struct device *dev)
 650 {
 651         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 652         int ret;
 653
 654         pinctrl_pm_select_default_state(dev);
 655         ret = imx_controller_resume(dev, PMSG_RESUME);
 656         if (!ret && data->supports_runtime_pm) {
 657                 pm_runtime_disable(dev);
 658                 pm_runtime_set_active(dev);
 659                 pm_runtime_enable(dev);
 660         }
 661
 662         return ret;
 663 }
 664
 665 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
 666 {
 667         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 668
 669         if (data->in_lpm) {
 670                 WARN_ON(1);
 671                 return 0;
 672         }
 673
 674         return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND);
 675 }
 676
 677 static int ci_hdrc_imx_runtime_resume(struct device *dev)
 678 {
 679         return imx_controller_resume(dev, PMSG_AUTO_RESUME);
 680 }
 681
 682 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 683         SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 684         RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend, ci_hdrc_imx_runtime_resume, NULL)
 685 };
 686 static struct platform_driver ci_hdrc_imx_driver = {
 687         .probe = ci_hdrc_imx_probe,
 688         .remove = ci_hdrc_imx_remove,
 689         .shutdown = ci_hdrc_imx_shutdown,
 690         .driver = {
 691                 .name = "imx_usb",
 692                 .of_match_table = ci_hdrc_imx_dt_ids,
 693                 .pm = pm_ptr(&ci_hdrc_imx_pm_ops),
 694          },
 695 };
 696
 697 module_platform_driver(ci_hdrc_imx_driver);
 698
 699 MODULE_ALIAS("platform:imx-usb");
 700 MODULE_LICENSE("GPL");
 701 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
 702 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
 703 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");