drivers/usb/renesas_usbhs/common.c

   1 /*
   2  * Renesas USB driver
   3  *
   4  * Copyright (C) 2011 Renesas Solutions Corp.
   5  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  15  *
  16  */
  17 #include <linux/err.h>
  18 #include <linux/gpio.h>
  19 #include <linux/io.h>
  20 #include <linux/module.h>
  21 #include <linux/of_device.h>
  22 #include <linux/of_gpio.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/slab.h>
  25 #include <linux/sysfs.h>
  26 #include "common.h"
  27 #include "rcar2.h"
  28
  29 /*
  30  *              image of renesas_usbhs
  31  *
  32  * ex) gadget case
  33
  34  * mod.c
  35  * mod_gadget.c
  36  * mod_host.c           pipe.c          fifo.c
  37  *
  38  *                      +-------+       +-----------+
  39  *                      | pipe0 |------>| fifo pio  |
  40  * +------------+       +-------+       +-----------+
  41  * | mod_gadget |=====> | pipe1 |--+
  42  * +------------+       +-------+  |    +-----------+
  43  *                      | pipe2 |  |  +-| fifo dma0 |
  44  * +------------+       +-------+  |  | +-----------+
  45  * | mod_host   |       | pipe3 |<-|--+
  46  * +------------+       +-------+  |    +-----------+
  47  *                      | ....  |  +--->| fifo dma1 |
  48  *                      | ....  |       +-----------+
  49  */
  50
  51
  52 #define USBHSF_RUNTIME_PWCTRL   (1 << 0)
  53
  54 /* status */
  55 #define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
  56 #define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
  57 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
  58 #define usbhsc_flags_has(p, b) ((p)->flags &   (b))
  59
  60 /*
  61  * platform call back
  62  *
  63  * renesas usb support platform callback function.
  64  * Below macro call it.
  65  * if platform doesn't have callback, it return 0 (no error)
  66  */
  67 #define usbhs_platform_call(priv, func, args...)\
  68         (!(priv) ? -ENODEV :                    \
  69          !((priv)->pfunc.func) ? 0 :            \
  70          (priv)->pfunc.func(args))
  71
  72 /*
  73  *              common functions
  74  */
  75 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
  76 {
  77         return ioread16(priv->base + reg);
  78 }
  79
  80 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
  81 {
  82         iowrite16(data, priv->base + reg);
  83 }
  84
  85 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
  86 {
  87         u16 val = usbhs_read(priv, reg);
  88
  89         val &= ~mask;
  90         val |= data & mask;
  91
  92         usbhs_write(priv, reg, val);
  93 }
  94
  95 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
  96 {
  97         return dev_get_drvdata(&pdev->dev);
  98 }
  99
 100 /*
 101  *              syscfg functions
 102  */
 103 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
 104 {
 105         usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
 106 }
 107
 108 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 109 {
 110         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 111         u16 val  = DCFM | DRPD | HSE | USBE;
 112         int has_otg = usbhs_get_dparam(priv, has_otg);
 113
 114         if (has_otg)
 115                 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
 116
 117         /*
 118          * if enable
 119          *
 120          * - select Host mode
 121          * - D+ Line/D- Line Pull-down
 122          */
 123         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 124 }
 125
 126 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
 127 {
 128         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 129         u16 val  = HSE | USBE;
 130
 131         /*
 132          * if enable
 133          *
 134          * - select Function mode
 135          * - D+ Line Pull-up is disabled
 136          *      When D+ Line Pull-up is enabled,
 137          *      calling usbhs_sys_function_pullup(,1)
 138          */
 139         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 140 }
 141
 142 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
 143 {
 144         usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
 145 }
 146
 147 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
 148 {
 149         usbhs_write(priv, TESTMODE, mode);
 150 }
 151
 152 /*
 153  *              frame functions
 154  */
 155 int usbhs_frame_get_num(struct usbhs_priv *priv)
 156 {
 157         return usbhs_read(priv, FRMNUM) & FRNM_MASK;
 158 }
 159
 160 /*
 161  *              usb request functions
 162  */
 163 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 164 {
 165         u16 val;
 166
 167         val = usbhs_read(priv, USBREQ);
 168         req->bRequest           = (val >> 8) & 0xFF;
 169         req->bRequestType       = (val >> 0) & 0xFF;
 170
 171         req->wValue     = usbhs_read(priv, USBVAL);
 172         req->wIndex     = usbhs_read(priv, USBINDX);
 173         req->wLength    = usbhs_read(priv, USBLENG);
 174 }
 175
 176 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 177 {
 178         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
 179         usbhs_write(priv, USBVAL,  req->wValue);
 180         usbhs_write(priv, USBINDX, req->wIndex);
 181         usbhs_write(priv, USBLENG, req->wLength);
 182
 183         usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
 184 }
 185
 186 /*
 187  *              bus/vbus functions
 188  */
 189 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
 190 {
 191         u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
 192
 193         if (status != USBRST) {
 194                 struct device *dev = usbhs_priv_to_dev(priv);
 195                 dev_err(dev, "usbhs should be reset\n");
 196         }
 197
 198         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
 199 }
 200
 201 void usbhs_bus_send_reset(struct usbhs_priv *priv)
 202 {
 203         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
 204 }
 205
 206 int usbhs_bus_get_speed(struct usbhs_priv *priv)
 207 {
 208         u16 dvstctr = usbhs_read(priv, DVSTCTR);
 209
 210         switch (RHST & dvstctr) {
 211         case RHST_LOW_SPEED:
 212                 return USB_SPEED_LOW;
 213         case RHST_FULL_SPEED:
 214                 return USB_SPEED_FULL;
 215         case RHST_HIGH_SPEED:
 216                 return USB_SPEED_HIGH;
 217         }
 218
 219         return USB_SPEED_UNKNOWN;
 220 }
 221
 222 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
 223 {
 224         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 225
 226         return usbhs_platform_call(priv, set_vbus, pdev, enable);
 227 }
 228
 229 static void usbhsc_bus_init(struct usbhs_priv *priv)
 230 {
 231         usbhs_write(priv, DVSTCTR, 0);
 232
 233         usbhs_vbus_ctrl(priv, 0);
 234 }
 235
 236 /*
 237  *              device configuration
 238  */
 239 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
 240                            u16 upphub, u16 hubport, u16 speed)
 241 {
 242         struct device *dev = usbhs_priv_to_dev(priv);
 243         u16 usbspd = 0;
 244         u32 reg = DEVADD0 + (2 * devnum);
 245
 246         if (devnum > 10) {
 247                 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
 248                 return -EIO;
 249         }
 250
 251         if (upphub > 0xA) {
 252                 dev_err(dev, "unsupported hub number %d\n", upphub);
 253                 return -EIO;
 254         }
 255
 256         switch (speed) {
 257         case USB_SPEED_LOW:
 258                 usbspd = USBSPD_SPEED_LOW;
 259                 break;
 260         case USB_SPEED_FULL:
 261                 usbspd = USBSPD_SPEED_FULL;
 262                 break;
 263         case USB_SPEED_HIGH:
 264                 usbspd = USBSPD_SPEED_HIGH;
 265                 break;
 266         default:
 267                 dev_err(dev, "unsupported speed %d\n", speed);
 268                 return -EIO;
 269         }
 270
 271         usbhs_write(priv, reg,  UPPHUB(upphub)  |
 272                                 HUBPORT(hubport)|
 273                                 USBSPD(usbspd));
 274
 275         return 0;
 276 }
 277
 278 /*
 279  *              interrupt functions
 280  */
 281 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
 282 {
 283         u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
 284
 285         usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
 286 }
 287
 288 /*
 289  *              local functions
 290  */
 291 static void usbhsc_set_buswait(struct usbhs_priv *priv)
 292 {
 293         int wait = usbhs_get_dparam(priv, buswait_bwait);
 294
 295         /* set bus wait if platform have */
 296         if (wait)
 297                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
 298 }
 299
 300 /*
 301  *              platform default param
 302  */
 303
 304 /* commonly used on old SH-Mobile SoCs */
 305 static u32 usbhsc_default_pipe_type[] = {
 306                 USB_ENDPOINT_XFER_CONTROL,
 307                 USB_ENDPOINT_XFER_ISOC,
 308                 USB_ENDPOINT_XFER_ISOC,
 309                 USB_ENDPOINT_XFER_BULK,
 310                 USB_ENDPOINT_XFER_BULK,
 311                 USB_ENDPOINT_XFER_BULK,
 312                 USB_ENDPOINT_XFER_INT,
 313                 USB_ENDPOINT_XFER_INT,
 314                 USB_ENDPOINT_XFER_INT,
 315                 USB_ENDPOINT_XFER_INT,
 316 };
 317
 318 /* commonly used on newer SH-Mobile and R-Car SoCs */
 319 static u32 usbhsc_new_pipe_type[] = {
 320                 USB_ENDPOINT_XFER_CONTROL,
 321                 USB_ENDPOINT_XFER_ISOC,
 322                 USB_ENDPOINT_XFER_ISOC,
 323                 USB_ENDPOINT_XFER_BULK,
 324                 USB_ENDPOINT_XFER_BULK,
 325                 USB_ENDPOINT_XFER_BULK,
 326                 USB_ENDPOINT_XFER_INT,
 327                 USB_ENDPOINT_XFER_INT,
 328                 USB_ENDPOINT_XFER_INT,
 329                 USB_ENDPOINT_XFER_BULK,
 330                 USB_ENDPOINT_XFER_BULK,
 331                 USB_ENDPOINT_XFER_BULK,
 332                 USB_ENDPOINT_XFER_BULK,
 333                 USB_ENDPOINT_XFER_BULK,
 334                 USB_ENDPOINT_XFER_BULK,
 335                 USB_ENDPOINT_XFER_BULK,
 336 };
 337
 338 /*
 339  *              power control
 340  */
 341 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 342 {
 343         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 344         struct device *dev = usbhs_priv_to_dev(priv);
 345
 346         if (enable) {
 347                 /* enable PM */
 348                 pm_runtime_get_sync(dev);
 349
 350                 /* enable platform power */
 351                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 352
 353                 /* USB on */
 354                 usbhs_sys_clock_ctrl(priv, enable);
 355         } else {
 356                 /* USB off */
 357                 usbhs_sys_clock_ctrl(priv, enable);
 358
 359                 /* disable platform power */
 360                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 361
 362                 /* disable PM */
 363                 pm_runtime_put_sync(dev);
 364         }
 365 }
 366
 367 /*
 368  *              hotplug
 369  */
 370 static void usbhsc_hotplug(struct usbhs_priv *priv)
 371 {
 372         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 373         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 374         int id;
 375         int enable;
 376         int cable;
 377         int ret;
 378
 379         /*
 380          * get vbus status from platform
 381          */
 382         enable = usbhs_platform_call(priv, get_vbus, pdev);
 383
 384         /*
 385          * get id from platform
 386          */
 387         id = usbhs_platform_call(priv, get_id, pdev);
 388
 389         if (enable && !mod) {
 390                 if (priv->edev) {
 391                         cable = extcon_get_cable_state_(priv->edev, EXTCON_USB_HOST);
 392                         if ((cable > 0 && id != USBHS_HOST) ||
 393                             (!cable && id != USBHS_GADGET)) {
 394                                 dev_info(&pdev->dev,
 395                                          "USB cable plugged in doesn't match the selected role!\n");
 396                                 return;
 397                         }
 398                 }
 399
 400                 ret = usbhs_mod_change(priv, id);
 401                 if (ret < 0)
 402                         return;
 403
 404                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
 405
 406                 /* power on */
 407                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 408                         usbhsc_power_ctrl(priv, enable);
 409
 410                 /* bus init */
 411                 usbhsc_set_buswait(priv);
 412                 usbhsc_bus_init(priv);
 413
 414                 /* module start */
 415                 usbhs_mod_call(priv, start, priv);
 416
 417         } else if (!enable && mod) {
 418                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
 419
 420                 /* module stop */
 421                 usbhs_mod_call(priv, stop, priv);
 422
 423                 /* bus init */
 424                 usbhsc_bus_init(priv);
 425
 426                 /* power off */
 427                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 428                         usbhsc_power_ctrl(priv, enable);
 429
 430                 usbhs_mod_change(priv, -1);
 431
 432                 /* reset phy for next connection */
 433                 usbhs_platform_call(priv, phy_reset, pdev);
 434         }
 435 }
 436
 437 /*
 438  *              notify hotplug
 439  */
 440 static void usbhsc_notify_hotplug(struct work_struct *work)
 441 {
 442         struct usbhs_priv *priv = container_of(work,
 443                                                struct usbhs_priv,
 444                                                notify_hotplug_work.work);
 445         usbhsc_hotplug(priv);
 446 }
 447
 448 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 449 {
 450         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 451         int delay = usbhs_get_dparam(priv, detection_delay);
 452
 453         /*
 454          * This functions will be called in interrupt.
 455          * To make sure safety context,
 456          * use workqueue for usbhs_notify_hotplug
 457          */
 458         schedule_delayed_work(&priv->notify_hotplug_work,
 459                               msecs_to_jiffies(delay));
 460         return 0;
 461 }
 462
 463 /*
 464  *              platform functions
 465  */
 466 static const struct of_device_id usbhs_of_match[] = {
 467         {
 468                 .compatible = "renesas,usbhs-r8a7790",
 469                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 470         },
 471         {
 472                 .compatible = "renesas,usbhs-r8a7791",
 473                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 474         },
 475         {
 476                 .compatible = "renesas,usbhs-r8a7794",
 477                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 478         },
 479         {
 480                 /* Gen3 is compatible with Gen2 */
 481                 .compatible = "renesas,usbhs-r8a7795",
 482                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 483         },
 484         { },
 485 };
 486 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 487
 488 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
 489 {
 490         struct renesas_usbhs_platform_info *info;
 491         struct renesas_usbhs_driver_param *dparam;
 492         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
 493         u32 tmp;
 494         int gpio;
 495
 496         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 497         if (!info)
 498                 return NULL;
 499
 500         dparam = &info->driver_param;
 501         dparam->type = of_id ? (uintptr_t)of_id->data : 0;
 502         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
 503                 dparam->buswait_bwait = tmp;
 504         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
 505                                        NULL);
 506         if (gpio > 0)
 507                 dparam->enable_gpio = gpio;
 508
 509         if (dparam->type == USBHS_TYPE_RCAR_GEN2)
 510                 dparam->has_usb_dmac = 1;
 511
 512         return info;
 513 }
 514
 515 static int usbhs_probe(struct platform_device *pdev)
 516 {
 517         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 518         struct renesas_usbhs_driver_callback *dfunc;
 519         struct usbhs_priv *priv;
 520         struct resource *res, *irq_res;
 521         int ret;
 522
 523         /* check device node */
 524         if (pdev->dev.of_node)
 525                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
 526
 527         /* check platform information */
 528         if (!info) {
 529                 dev_err(&pdev->dev, "no platform information\n");
 530                 return -EINVAL;
 531         }
 532
 533         /* platform data */
 534         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 535         if (!irq_res) {
 536                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
 537                 return -ENODEV;
 538         }
 539
 540         /* usb private data */
 541         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 542         if (!priv)
 543                 return -ENOMEM;
 544
 545         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 546         priv->base = devm_ioremap_resource(&pdev->dev, res);
 547         if (IS_ERR(priv->base))
 548                 return PTR_ERR(priv->base);
 549
 550         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
 551                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
 552                 if (IS_ERR(priv->edev))
 553                         return PTR_ERR(priv->edev);
 554         }
 555
 556         /*
 557          * care platform info
 558          */
 559
 560         memcpy(&priv->dparam,
 561                &info->driver_param,
 562                sizeof(struct renesas_usbhs_driver_param));
 563
 564         switch (priv->dparam.type) {
 565         case USBHS_TYPE_RCAR_GEN2:
 566                 priv->pfunc = usbhs_rcar2_ops;
 567                 if (!priv->dparam.pipe_type) {
 568                         priv->dparam.pipe_type = usbhsc_new_pipe_type;
 569                         priv->dparam.pipe_size =
 570                                 ARRAY_SIZE(usbhsc_new_pipe_type);
 571                 }
 572                 break;
 573         default:
 574                 if (!info->platform_callback.get_id) {
 575                         dev_err(&pdev->dev, "no platform callbacks");
 576                         return -EINVAL;
 577                 }
 578                 memcpy(&priv->pfunc,
 579                        &info->platform_callback,
 580                        sizeof(struct renesas_usbhs_platform_callback));
 581                 break;
 582         }
 583
 584         /* set driver callback functions for platform */
 585         dfunc                   = &info->driver_callback;
 586         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
 587
 588         /* set default param if platform doesn't have */
 589         if (!priv->dparam.pipe_type) {
 590                 priv->dparam.pipe_type = usbhsc_default_pipe_type;
 591                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
 592         }
 593         if (!priv->dparam.pio_dma_border)
 594                 priv->dparam.pio_dma_border = 64; /* 64byte */
 595
 596         /* FIXME */
 597         /* runtime power control ? */
 598         if (priv->pfunc.get_vbus)
 599                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
 600
 601         /*
 602          * priv settings
 603          */
 604         priv->irq       = irq_res->start;
 605         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
 606                 priv->irqflags = IRQF_SHARED;
 607         priv->pdev      = pdev;
 608         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 609         spin_lock_init(usbhs_priv_to_lock(priv));
 610
 611         /* call pipe and module init */
 612         ret = usbhs_pipe_probe(priv);
 613         if (ret < 0)
 614                 return ret;
 615
 616         ret = usbhs_fifo_probe(priv);
 617         if (ret < 0)
 618                 goto probe_end_pipe_exit;
 619
 620         ret = usbhs_mod_probe(priv);
 621         if (ret < 0)
 622                 goto probe_end_fifo_exit;
 623
 624         /* dev_set_drvdata should be called after usbhs_mod_init */
 625         platform_set_drvdata(pdev, priv);
 626
 627         /*
 628          * deviece reset here because
 629          * USB device might be used in boot loader.
 630          */
 631         usbhs_sys_clock_ctrl(priv, 0);
 632
 633         /* check GPIO determining if USB function should be enabled */
 634         if (priv->dparam.enable_gpio) {
 635                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
 636                 ret = !gpio_get_value(priv->dparam.enable_gpio);
 637                 gpio_free(priv->dparam.enable_gpio);
 638                 if (ret) {
 639                         dev_warn(&pdev->dev,
 640                                  "USB function not selected (GPIO %d)\n",
 641                                  priv->dparam.enable_gpio);
 642                         ret = -ENOTSUPP;
 643                         goto probe_end_mod_exit;
 644                 }
 645         }
 646
 647         /*
 648          * platform call
 649          *
 650          * USB phy setup might depend on CPU/Board.
 651          * If platform has its callback functions,
 652          * call it here.
 653          */
 654         ret = usbhs_platform_call(priv, hardware_init, pdev);
 655         if (ret < 0) {
 656                 dev_err(&pdev->dev, "platform init failed.\n");
 657                 goto probe_end_mod_exit;
 658         }
 659
 660         /* reset phy for connection */
 661         usbhs_platform_call(priv, phy_reset, pdev);
 662
 663         /* power control */
 664         pm_runtime_enable(&pdev->dev);
 665         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
 666                 usbhsc_power_ctrl(priv, 1);
 667                 usbhs_mod_autonomy_mode(priv);
 668         }
 669
 670         /*
 671          * manual call notify_hotplug for cold plug
 672          */
 673         usbhsc_drvcllbck_notify_hotplug(pdev);
 674
 675         dev_info(&pdev->dev, "probed\n");
 676
 677         return ret;
 678
 679 probe_end_mod_exit:
 680         usbhs_mod_remove(priv);
 681 probe_end_fifo_exit:
 682         usbhs_fifo_remove(priv);
 683 probe_end_pipe_exit:
 684         usbhs_pipe_remove(priv);
 685
 686         dev_info(&pdev->dev, "probe failed\n");
 687
 688         return ret;
 689 }
 690
 691 static int usbhs_remove(struct platform_device *pdev)
 692 {
 693         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 694         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 695         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
 696
 697         dev_dbg(&pdev->dev, "usb remove\n");
 698
 699         dfunc->notify_hotplug = NULL;
 700
 701         /* power off */
 702         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 703                 usbhsc_power_ctrl(priv, 0);
 704
 705         pm_runtime_disable(&pdev->dev);
 706
 707         usbhs_platform_call(priv, hardware_exit, pdev);
 708         usbhs_mod_remove(priv);
 709         usbhs_fifo_remove(priv);
 710         usbhs_pipe_remove(priv);
 711
 712         return 0;
 713 }
 714
 715 static int usbhsc_suspend(struct device *dev)
 716 {
 717         struct usbhs_priv *priv = dev_get_drvdata(dev);
 718         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 719
 720         if (mod) {
 721                 usbhs_mod_call(priv, stop, priv);
 722                 usbhs_mod_change(priv, -1);
 723         }
 724
 725         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 726                 usbhsc_power_ctrl(priv, 0);
 727
 728         return 0;
 729 }
 730
 731 static int usbhsc_resume(struct device *dev)
 732 {
 733         struct usbhs_priv *priv = dev_get_drvdata(dev);
 734         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 735
 736         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 737                 usbhsc_power_ctrl(priv, 1);
 738
 739         usbhs_platform_call(priv, phy_reset, pdev);
 740
 741         usbhsc_drvcllbck_notify_hotplug(pdev);
 742
 743         return 0;
 744 }
 745
 746 static int usbhsc_runtime_nop(struct device *dev)
 747 {
 748         /* Runtime PM callback shared between ->runtime_suspend()
 749          * and ->runtime_resume(). Simply returns success.
 750          *
 751          * This driver re-initializes all registers after
 752          * pm_runtime_get_sync() anyway so there is no need
 753          * to save and restore registers here.
 754          */
 755         return 0;
 756 }
 757
 758 static const struct dev_pm_ops usbhsc_pm_ops = {
 759         .suspend                = usbhsc_suspend,
 760         .resume                 = usbhsc_resume,
 761         .runtime_suspend        = usbhsc_runtime_nop,
 762         .runtime_resume         = usbhsc_runtime_nop,
 763 };
 764
 765 static struct platform_driver renesas_usbhs_driver = {
 766         .driver         = {
 767                 .name   = "renesas_usbhs",
 768                 .pm     = &usbhsc_pm_ops,
 769                 .of_match_table = of_match_ptr(usbhs_of_match),
 770         },
 771         .probe          = usbhs_probe,
 772         .remove         = usbhs_remove,
 773 };
 774
 775 module_platform_driver(renesas_usbhs_driver);
 776
 777 MODULE_LICENSE("GPL");
 778 MODULE_DESCRIPTION("Renesas USB driver");
 779 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");