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 <[email protected]>
   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         struct imx_usbmisc_data *mdata = data->usbmisc_data;
 275
 276         switch (event) {
 277         case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
 278                 if (data->pinctrl) {
 279                         ret = pinctrl_select_state(data->pinctrl,
 280                                         data->pinctrl_hsic_active);
 281                         if (ret)
 282                                 dev_err(dev,
 283                                         "hsic_active select failed, err=%d\n",
 284                                         ret);
 285                 }
 286                 break;
 287         case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
 288                 ret = imx_usbmisc_hsic_set_connect(mdata);
 289                 if (ret)
 290                         dev_err(dev,
 291                                 "hsic_set_connect failed, err=%d\n", ret);
 292                 break;
 293         case CI_HDRC_CONTROLLER_VBUS_EVENT:
 294                 if (ci->vbus_active)
 295                         ret = imx_usbmisc_charger_detection(mdata, true);
 296                 else
 297                         ret = imx_usbmisc_charger_detection(mdata, false);
 298                 if (ci->usb_phy)
 299                         schedule_work(&ci->usb_phy->chg_work);
 300                 break;
 301         default:
 302                 break;
 303         }
 304
 305         return ret;
 306 }
 307
 308 static int ci_hdrc_imx_probe(struct platform_device *pdev)
 309 {
 310         struct ci_hdrc_imx_data *data;
 311         struct ci_hdrc_platform_data pdata = {
 312                 .name           = dev_name(&pdev->dev),
 313                 .capoffset      = DEF_CAPOFFSET,
 314                 .notify_event   = ci_hdrc_imx_notify_event,
 315         };
 316         int ret;
 317         const struct of_device_id *of_id;
 318         const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
 319         struct device_node *np = pdev->dev.of_node;
 320         struct device *dev = &pdev->dev;
 321
 322         of_id = of_match_device(ci_hdrc_imx_dt_ids, dev);
 323         if (!of_id)
 324                 return -ENODEV;
 325
 326         imx_platform_flag = of_id->data;
 327
 328         data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 329         if (!data)
 330                 return -ENOMEM;
 331
 332         data->plat_data = imx_platform_flag;
 333         pdata.flags |= imx_platform_flag->flags;
 334         platform_set_drvdata(pdev, data);
 335         data->usbmisc_data = usbmisc_get_init_data(dev);
 336         if (IS_ERR(data->usbmisc_data))
 337                 return PTR_ERR(data->usbmisc_data);
 338
 339         if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
 340                 && data->usbmisc_data) {
 341                 pdata.flags |= CI_HDRC_IMX_IS_HSIC;
 342                 data->usbmisc_data->hsic = 1;
 343                 data->pinctrl = devm_pinctrl_get(dev);
 344                 if (PTR_ERR(data->pinctrl) == -ENODEV)
 345                         data->pinctrl = NULL;
 346                 else if (IS_ERR(data->pinctrl)) {
 347                         if (PTR_ERR(data->pinctrl) != -EPROBE_DEFER)
 348                                 dev_err(dev, "pinctrl get failed, err=%ld\n",
 349                                         PTR_ERR(data->pinctrl));
 350                         return PTR_ERR(data->pinctrl);
 351                 }
 352
 353                 data->hsic_pad_regulator =
 354                                 devm_regulator_get_optional(dev, "hsic");
 355                 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
 356                         /* no pad regualator is needed */
 357                         data->hsic_pad_regulator = NULL;
 358                 } else if (IS_ERR(data->hsic_pad_regulator)) {
 359                         if (PTR_ERR(data->hsic_pad_regulator) != -EPROBE_DEFER)
 360                                 dev_err(dev,
 361                                         "Get HSIC pad regulator error: %ld\n",
 362                                         PTR_ERR(data->hsic_pad_regulator));
 363                         return PTR_ERR(data->hsic_pad_regulator);
 364                 }
 365
 366                 if (data->hsic_pad_regulator) {
 367                         ret = regulator_enable(data->hsic_pad_regulator);
 368                         if (ret) {
 369                                 dev_err(dev,
 370                                         "Failed to enable HSIC pad regulator\n");
 371                                 return ret;
 372                         }
 373                 }
 374         }
 375
 376         /* HSIC pinctrl handling */
 377         if (data->pinctrl) {
 378                 struct pinctrl_state *pinctrl_hsic_idle;
 379
 380                 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
 381                 if (IS_ERR(pinctrl_hsic_idle)) {
 382                         dev_err(dev,
 383                                 "pinctrl_hsic_idle lookup failed, err=%ld\n",
 384                                         PTR_ERR(pinctrl_hsic_idle));
 385                         return PTR_ERR(pinctrl_hsic_idle);
 386                 }
 387
 388                 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
 389                 if (ret) {
 390                         dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
 391                         return ret;
 392                 }
 393
 394                 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
 395                                                                 "active");
 396                 if (IS_ERR(data->pinctrl_hsic_active)) {
 397                         dev_err(dev,
 398                                 "pinctrl_hsic_active lookup failed, err=%ld\n",
 399                                         PTR_ERR(data->pinctrl_hsic_active));
 400                         return PTR_ERR(data->pinctrl_hsic_active);
 401                 }
 402         }
 403
 404         if (pdata.flags & CI_HDRC_PMQOS)
 405                 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
 406
 407         ret = imx_get_clks(dev);
 408         if (ret)
 409                 goto disable_hsic_regulator;
 410
 411         ret = imx_prepare_enable_clks(dev);
 412         if (ret)
 413                 goto disable_hsic_regulator;
 414
 415         data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
 416         if (IS_ERR(data->phy)) {
 417                 ret = PTR_ERR(data->phy);
 418                 /* Return -EINVAL if no usbphy is available */
 419                 if (ret == -ENODEV)
 420                         data->phy = NULL;
 421                 else
 422                         goto err_clk;
 423         }
 424
 425         pdata.usb_phy = data->phy;
 426         if (data->usbmisc_data)
 427                 data->usbmisc_data->usb_phy = data->phy;
 428
 429         if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
 430              of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
 431             of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
 432                 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
 433                 data->override_phy_control = true;
 434                 usb_phy_init(pdata.usb_phy);
 435         }
 436
 437         if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
 438                 data->supports_runtime_pm = true;
 439
 440         ret = imx_usbmisc_init(data->usbmisc_data);
 441         if (ret) {
 442                 dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
 443                 goto err_clk;
 444         }
 445
 446         data->ci_pdev = ci_hdrc_add_device(dev,
 447                                 pdev->resource, pdev->num_resources,
 448                                 &pdata);
 449         if (IS_ERR(data->ci_pdev)) {
 450                 ret = PTR_ERR(data->ci_pdev);
 451                 if (ret != -EPROBE_DEFER)
 452                         dev_err(dev, "ci_hdrc_add_device failed, err=%d\n",
 453                                         ret);
 454                 goto err_clk;
 455         }
 456
 457         if (data->usbmisc_data) {
 458                 if (!IS_ERR(pdata.id_extcon.edev) ||
 459                     of_property_read_bool(np, "usb-role-switch"))
 460                         data->usbmisc_data->ext_id = 1;
 461
 462                 if (!IS_ERR(pdata.vbus_extcon.edev) ||
 463                     of_property_read_bool(np, "usb-role-switch"))
 464                         data->usbmisc_data->ext_vbus = 1;
 465
 466                 /* usbmisc needs to know dr mode to choose wakeup setting */
 467                 data->usbmisc_data->available_role =
 468                         ci_hdrc_query_available_role(data->ci_pdev);
 469         }
 470
 471         ret = imx_usbmisc_init_post(data->usbmisc_data);
 472         if (ret) {
 473                 dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
 474                 goto disable_device;
 475         }
 476
 477         if (data->supports_runtime_pm) {
 478                 pm_runtime_set_active(dev);
 479                 pm_runtime_enable(dev);
 480         }
 481
 482         device_set_wakeup_capable(dev, true);
 483
 484         return 0;
 485
 486 disable_device:
 487         ci_hdrc_remove_device(data->ci_pdev);
 488 err_clk:
 489         imx_disable_unprepare_clks(dev);
 490 disable_hsic_regulator:
 491         if (data->hsic_pad_regulator)
 492                 /* don't overwrite original ret (cf. EPROBE_DEFER) */
 493                 regulator_disable(data->hsic_pad_regulator);
 494         if (pdata.flags & CI_HDRC_PMQOS)
 495                 cpu_latency_qos_remove_request(&data->pm_qos_req);
 496         data->ci_pdev = NULL;
 497         return ret;
 498 }
 499
 500 static int ci_hdrc_imx_remove(struct platform_device *pdev)
 501 {
 502         struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
 503
 504         if (data->supports_runtime_pm) {
 505                 pm_runtime_get_sync(&pdev->dev);
 506                 pm_runtime_disable(&pdev->dev);
 507                 pm_runtime_put_noidle(&pdev->dev);
 508         }
 509         if (data->ci_pdev)
 510                 ci_hdrc_remove_device(data->ci_pdev);
 511         if (data->override_phy_control)
 512                 usb_phy_shutdown(data->phy);
 513         if (data->ci_pdev) {
 514                 imx_disable_unprepare_clks(&pdev->dev);
 515                 if (data->plat_data->flags & CI_HDRC_PMQOS)
 516                         cpu_latency_qos_remove_request(&data->pm_qos_req);
 517                 if (data->hsic_pad_regulator)
 518                         regulator_disable(data->hsic_pad_regulator);
 519         }
 520
 521         return 0;
 522 }
 523
 524 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
 525 {
 526         ci_hdrc_imx_remove(pdev);
 527 }
 528
 529 static int __maybe_unused imx_controller_suspend(struct device *dev)
 530 {
 531         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 532         int ret = 0;
 533
 534         dev_dbg(dev, "at %s\n", __func__);
 535
 536         ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, false);
 537         if (ret) {
 538                 dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
 539                 return ret;
 540         }
 541
 542         imx_disable_unprepare_clks(dev);
 543         if (data->plat_data->flags & CI_HDRC_PMQOS)
 544                 cpu_latency_qos_remove_request(&data->pm_qos_req);
 545
 546         data->in_lpm = true;
 547
 548         return 0;
 549 }
 550
 551 static int __maybe_unused imx_controller_resume(struct device *dev)
 552 {
 553         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 554         int ret = 0;
 555
 556         dev_dbg(dev, "at %s\n", __func__);
 557
 558         if (!data->in_lpm) {
 559                 WARN_ON(1);
 560                 return 0;
 561         }
 562
 563         if (data->plat_data->flags & CI_HDRC_PMQOS)
 564                 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
 565
 566         ret = imx_prepare_enable_clks(dev);
 567         if (ret)
 568                 return ret;
 569
 570         data->in_lpm = false;
 571
 572         ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
 573         if (ret) {
 574                 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 575                 goto clk_disable;
 576         }
 577
 578         ret = imx_usbmisc_hsic_set_clk(data->usbmisc_data, true);
 579         if (ret) {
 580                 dev_err(dev, "usbmisc hsic_set_clk failed, ret=%d\n", ret);
 581                 goto hsic_set_clk_fail;
 582         }
 583
 584         return 0;
 585
 586 hsic_set_clk_fail:
 587         imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 588 clk_disable:
 589         imx_disable_unprepare_clks(dev);
 590         return ret;
 591 }
 592
 593 static int __maybe_unused ci_hdrc_imx_suspend(struct device *dev)
 594 {
 595         int ret;
 596
 597         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 598
 599         if (data->in_lpm)
 600                 /* The core's suspend doesn't run */
 601                 return 0;
 602
 603         if (device_may_wakeup(dev)) {
 604                 ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 605                 if (ret) {
 606                         dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
 607                                         ret);
 608                         return ret;
 609                 }
 610         }
 611
 612         return imx_controller_suspend(dev);
 613 }
 614
 615 static int __maybe_unused ci_hdrc_imx_resume(struct device *dev)
 616 {
 617         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 618         int ret;
 619
 620         ret = imx_controller_resume(dev);
 621         if (!ret && data->supports_runtime_pm) {
 622                 pm_runtime_disable(dev);
 623                 pm_runtime_set_active(dev);
 624                 pm_runtime_enable(dev);
 625         }
 626
 627         return ret;
 628 }
 629
 630 static int __maybe_unused ci_hdrc_imx_runtime_suspend(struct device *dev)
 631 {
 632         struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 633         int ret;
 634
 635         if (data->in_lpm) {
 636                 WARN_ON(1);
 637                 return 0;
 638         }
 639
 640         ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 641         if (ret) {
 642                 dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 643                 return ret;
 644         }
 645
 646         return imx_controller_suspend(dev);
 647 }
 648
 649 static int __maybe_unused ci_hdrc_imx_runtime_resume(struct device *dev)
 650 {
 651         return imx_controller_resume(dev);
 652 }
 653
 654 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 655         SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 656         SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
 657                         ci_hdrc_imx_runtime_resume, NULL)
 658 };
 659 static struct platform_driver ci_hdrc_imx_driver = {
 660         .probe = ci_hdrc_imx_probe,
 661         .remove = ci_hdrc_imx_remove,
 662         .shutdown = ci_hdrc_imx_shutdown,
 663         .driver = {
 664                 .name = "imx_usb",
 665                 .of_match_table = ci_hdrc_imx_dt_ids,
 666                 .pm = &ci_hdrc_imx_pm_ops,
 667          },
 668 };
 669
 670 module_platform_driver(ci_hdrc_imx_driver);
 671
 672 MODULE_ALIAS("platform:imx-usb");
 673 MODULE_LICENSE("GPL");
 674 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
 675 MODULE_AUTHOR("Marek Vasut <[email protected]>");
 676 MODULE_AUTHOR("Richard Zhao <[email protected]>");