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  = DPRPU | HSE | USBE;
 130
 131         /*
 132          * if enable
 133          *
 134          * - select Function mode
 135          * - D+ Line Pull-up
 136          */
 137         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 138 }
 139
 140 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
 141 {
 142         usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
 143 }
 144
 145 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
 146 {
 147         usbhs_write(priv, TESTMODE, mode);
 148 }
 149
 150 /*
 151  *              frame functions
 152  */
 153 int usbhs_frame_get_num(struct usbhs_priv *priv)
 154 {
 155         return usbhs_read(priv, FRMNUM) & FRNM_MASK;
 156 }
 157
 158 /*
 159  *              usb request functions
 160  */
 161 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 162 {
 163         u16 val;
 164
 165         val = usbhs_read(priv, USBREQ);
 166         req->bRequest           = (val >> 8) & 0xFF;
 167         req->bRequestType       = (val >> 0) & 0xFF;
 168
 169         req->wValue     = usbhs_read(priv, USBVAL);
 170         req->wIndex     = usbhs_read(priv, USBINDX);
 171         req->wLength    = usbhs_read(priv, USBLENG);
 172 }
 173
 174 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 175 {
 176         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
 177         usbhs_write(priv, USBVAL,  req->wValue);
 178         usbhs_write(priv, USBINDX, req->wIndex);
 179         usbhs_write(priv, USBLENG, req->wLength);
 180
 181         usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
 182 }
 183
 184 /*
 185  *              bus/vbus functions
 186  */
 187 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
 188 {
 189         u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
 190
 191         if (status != USBRST) {
 192                 struct device *dev = usbhs_priv_to_dev(priv);
 193                 dev_err(dev, "usbhs should be reset\n");
 194         }
 195
 196         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
 197 }
 198
 199 void usbhs_bus_send_reset(struct usbhs_priv *priv)
 200 {
 201         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
 202 }
 203
 204 int usbhs_bus_get_speed(struct usbhs_priv *priv)
 205 {
 206         u16 dvstctr = usbhs_read(priv, DVSTCTR);
 207
 208         switch (RHST & dvstctr) {
 209         case RHST_LOW_SPEED:
 210                 return USB_SPEED_LOW;
 211         case RHST_FULL_SPEED:
 212                 return USB_SPEED_FULL;
 213         case RHST_HIGH_SPEED:
 214                 return USB_SPEED_HIGH;
 215         }
 216
 217         return USB_SPEED_UNKNOWN;
 218 }
 219
 220 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
 221 {
 222         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 223
 224         return usbhs_platform_call(priv, set_vbus, pdev, enable);
 225 }
 226
 227 static void usbhsc_bus_init(struct usbhs_priv *priv)
 228 {
 229         usbhs_write(priv, DVSTCTR, 0);
 230
 231         usbhs_vbus_ctrl(priv, 0);
 232 }
 233
 234 /*
 235  *              device configuration
 236  */
 237 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
 238                            u16 upphub, u16 hubport, u16 speed)
 239 {
 240         struct device *dev = usbhs_priv_to_dev(priv);
 241         u16 usbspd = 0;
 242         u32 reg = DEVADD0 + (2 * devnum);
 243
 244         if (devnum > 10) {
 245                 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
 246                 return -EIO;
 247         }
 248
 249         if (upphub > 0xA) {
 250                 dev_err(dev, "unsupported hub number %d\n", upphub);
 251                 return -EIO;
 252         }
 253
 254         switch (speed) {
 255         case USB_SPEED_LOW:
 256                 usbspd = USBSPD_SPEED_LOW;
 257                 break;
 258         case USB_SPEED_FULL:
 259                 usbspd = USBSPD_SPEED_FULL;
 260                 break;
 261         case USB_SPEED_HIGH:
 262                 usbspd = USBSPD_SPEED_HIGH;
 263                 break;
 264         default:
 265                 dev_err(dev, "unsupported speed %d\n", speed);
 266                 return -EIO;
 267         }
 268
 269         usbhs_write(priv, reg,  UPPHUB(upphub)  |
 270                                 HUBPORT(hubport)|
 271                                 USBSPD(usbspd));
 272
 273         return 0;
 274 }
 275
 276 /*
 277  *              local functions
 278  */
 279 static void usbhsc_set_buswait(struct usbhs_priv *priv)
 280 {
 281         int wait = usbhs_get_dparam(priv, buswait_bwait);
 282
 283         /* set bus wait if platform have */
 284         if (wait)
 285                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
 286 }
 287
 288 /*
 289  *              platform default param
 290  */
 291
 292 /* commonly used on old SH-Mobile SoCs */
 293 static u32 usbhsc_default_pipe_type[] = {
 294                 USB_ENDPOINT_XFER_CONTROL,
 295                 USB_ENDPOINT_XFER_ISOC,
 296                 USB_ENDPOINT_XFER_ISOC,
 297                 USB_ENDPOINT_XFER_BULK,
 298                 USB_ENDPOINT_XFER_BULK,
 299                 USB_ENDPOINT_XFER_BULK,
 300                 USB_ENDPOINT_XFER_INT,
 301                 USB_ENDPOINT_XFER_INT,
 302                 USB_ENDPOINT_XFER_INT,
 303                 USB_ENDPOINT_XFER_INT,
 304 };
 305
 306 /* commonly used on newer SH-Mobile and R-Car SoCs */
 307 static u32 usbhsc_new_pipe_type[] = {
 308                 USB_ENDPOINT_XFER_CONTROL,
 309                 USB_ENDPOINT_XFER_ISOC,
 310                 USB_ENDPOINT_XFER_ISOC,
 311                 USB_ENDPOINT_XFER_BULK,
 312                 USB_ENDPOINT_XFER_BULK,
 313                 USB_ENDPOINT_XFER_BULK,
 314                 USB_ENDPOINT_XFER_INT,
 315                 USB_ENDPOINT_XFER_INT,
 316                 USB_ENDPOINT_XFER_INT,
 317                 USB_ENDPOINT_XFER_BULK,
 318                 USB_ENDPOINT_XFER_BULK,
 319                 USB_ENDPOINT_XFER_BULK,
 320                 USB_ENDPOINT_XFER_BULK,
 321                 USB_ENDPOINT_XFER_BULK,
 322                 USB_ENDPOINT_XFER_BULK,
 323                 USB_ENDPOINT_XFER_BULK,
 324 };
 325
 326 /*
 327  *              power control
 328  */
 329 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 330 {
 331         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 332         struct device *dev = usbhs_priv_to_dev(priv);
 333
 334         if (enable) {
 335                 /* enable PM */
 336                 pm_runtime_get_sync(dev);
 337
 338                 /* enable platform power */
 339                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 340
 341                 /* USB on */
 342                 usbhs_sys_clock_ctrl(priv, enable);
 343         } else {
 344                 /* USB off */
 345                 usbhs_sys_clock_ctrl(priv, enable);
 346
 347                 /* disable platform power */
 348                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 349
 350                 /* disable PM */
 351                 pm_runtime_put_sync(dev);
 352         }
 353 }
 354
 355 /*
 356  *              hotplug
 357  */
 358 static void usbhsc_hotplug(struct usbhs_priv *priv)
 359 {
 360         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 361         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 362         int id;
 363         int enable;
 364         int ret;
 365
 366         /*
 367          * get vbus status from platform
 368          */
 369         enable = usbhs_platform_call(priv, get_vbus, pdev);
 370
 371         /*
 372          * get id from platform
 373          */
 374         id = usbhs_platform_call(priv, get_id, pdev);
 375
 376         if (enable && !mod) {
 377                 ret = usbhs_mod_change(priv, id);
 378                 if (ret < 0)
 379                         return;
 380
 381                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
 382
 383                 /* power on */
 384                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 385                         usbhsc_power_ctrl(priv, enable);
 386
 387                 /* bus init */
 388                 usbhsc_set_buswait(priv);
 389                 usbhsc_bus_init(priv);
 390
 391                 /* module start */
 392                 usbhs_mod_call(priv, start, priv);
 393
 394         } else if (!enable && mod) {
 395                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
 396
 397                 /* module stop */
 398                 usbhs_mod_call(priv, stop, priv);
 399
 400                 /* bus init */
 401                 usbhsc_bus_init(priv);
 402
 403                 /* power off */
 404                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 405                         usbhsc_power_ctrl(priv, enable);
 406
 407                 usbhs_mod_change(priv, -1);
 408
 409                 /* reset phy for next connection */
 410                 usbhs_platform_call(priv, phy_reset, pdev);
 411         }
 412 }
 413
 414 /*
 415  *              notify hotplug
 416  */
 417 static void usbhsc_notify_hotplug(struct work_struct *work)
 418 {
 419         struct usbhs_priv *priv = container_of(work,
 420                                                struct usbhs_priv,
 421                                                notify_hotplug_work.work);
 422         usbhsc_hotplug(priv);
 423 }
 424
 425 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 426 {
 427         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 428         int delay = usbhs_get_dparam(priv, detection_delay);
 429
 430         /*
 431          * This functions will be called in interrupt.
 432          * To make sure safety context,
 433          * use workqueue for usbhs_notify_hotplug
 434          */
 435         schedule_delayed_work(&priv->notify_hotplug_work,
 436                               msecs_to_jiffies(delay));
 437         return 0;
 438 }
 439
 440 /*
 441  *              platform functions
 442  */
 443 static const struct of_device_id usbhs_of_match[] = {
 444         {
 445                 .compatible = "renesas,usbhs-r8a7790",
 446                 .data = (void *)USBHS_TYPE_R8A7790,
 447         },
 448         {
 449                 .compatible = "renesas,usbhs-r8a7791",
 450                 .data = (void *)USBHS_TYPE_R8A7791,
 451         },
 452         { },
 453 };
 454 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 455
 456 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
 457 {
 458         struct renesas_usbhs_platform_info *info;
 459         struct renesas_usbhs_driver_param *dparam;
 460         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
 461         u32 tmp;
 462         int gpio;
 463
 464         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 465         if (!info)
 466                 return NULL;
 467
 468         dparam = &info->driver_param;
 469         dparam->type = of_id ? (u32)of_id->data : 0;
 470         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
 471                 dparam->buswait_bwait = tmp;
 472         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
 473                                        NULL);
 474         if (gpio > 0)
 475                 dparam->enable_gpio = gpio;
 476
 477         return info;
 478 }
 479
 480 static int usbhs_probe(struct platform_device *pdev)
 481 {
 482         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 483         struct renesas_usbhs_driver_callback *dfunc;
 484         struct usbhs_priv *priv;
 485         struct resource *res, *irq_res;
 486         int ret;
 487
 488         /* check device node */
 489         if (pdev->dev.of_node)
 490                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
 491
 492         /* check platform information */
 493         if (!info) {
 494                 dev_err(&pdev->dev, "no platform information\n");
 495                 return -EINVAL;
 496         }
 497
 498         /* platform data */
 499         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 500         if (!irq_res) {
 501                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
 502                 return -ENODEV;
 503         }
 504
 505         /* usb private data */
 506         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 507         if (!priv)
 508                 return -ENOMEM;
 509
 510         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 511         priv->base = devm_ioremap_resource(&pdev->dev, res);
 512         if (IS_ERR(priv->base))
 513                 return PTR_ERR(priv->base);
 514
 515         /*
 516          * care platform info
 517          */
 518
 519         memcpy(&priv->dparam,
 520                &info->driver_param,
 521                sizeof(struct renesas_usbhs_driver_param));
 522
 523         switch (priv->dparam.type) {
 524         case USBHS_TYPE_R8A7790:
 525         case USBHS_TYPE_R8A7791:
 526                 priv->pfunc = usbhs_rcar2_ops;
 527                 if (!priv->dparam.pipe_type) {
 528                         priv->dparam.pipe_type = usbhsc_new_pipe_type;
 529                         priv->dparam.pipe_size =
 530                                 ARRAY_SIZE(usbhsc_new_pipe_type);
 531                 }
 532                 break;
 533         default:
 534                 if (!info->platform_callback.get_id) {
 535                         dev_err(&pdev->dev, "no platform callbacks");
 536                         return -EINVAL;
 537                 }
 538                 memcpy(&priv->pfunc,
 539                        &info->platform_callback,
 540                        sizeof(struct renesas_usbhs_platform_callback));
 541                 break;
 542         }
 543
 544         /* set driver callback functions for platform */
 545         dfunc                   = &info->driver_callback;
 546         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
 547
 548         /* set default param if platform doesn't have */
 549         if (!priv->dparam.pipe_type) {
 550                 priv->dparam.pipe_type = usbhsc_default_pipe_type;
 551                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
 552         }
 553         if (!priv->dparam.pio_dma_border)
 554                 priv->dparam.pio_dma_border = 64; /* 64byte */
 555
 556         /* FIXME */
 557         /* runtime power control ? */
 558         if (priv->pfunc.get_vbus)
 559                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
 560
 561         /*
 562          * priv settings
 563          */
 564         priv->irq       = irq_res->start;
 565         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
 566                 priv->irqflags = IRQF_SHARED;
 567         priv->pdev      = pdev;
 568         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 569         spin_lock_init(usbhs_priv_to_lock(priv));
 570
 571         /* call pipe and module init */
 572         ret = usbhs_pipe_probe(priv);
 573         if (ret < 0)
 574                 return ret;
 575
 576         ret = usbhs_fifo_probe(priv);
 577         if (ret < 0)
 578                 goto probe_end_pipe_exit;
 579
 580         ret = usbhs_mod_probe(priv);
 581         if (ret < 0)
 582                 goto probe_end_fifo_exit;
 583
 584         /* dev_set_drvdata should be called after usbhs_mod_init */
 585         platform_set_drvdata(pdev, priv);
 586
 587         /*
 588          * deviece reset here because
 589          * USB device might be used in boot loader.
 590          */
 591         usbhs_sys_clock_ctrl(priv, 0);
 592
 593         /* check GPIO determining if USB function should be enabled */
 594         if (priv->dparam.enable_gpio) {
 595                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
 596                 ret = !gpio_get_value(priv->dparam.enable_gpio);
 597                 gpio_free(priv->dparam.enable_gpio);
 598                 if (ret) {
 599                         dev_warn(&pdev->dev,
 600                                  "USB function not selected (GPIO %d)\n",
 601                                  priv->dparam.enable_gpio);
 602                         ret = -ENOTSUPP;
 603                         goto probe_end_mod_exit;
 604                 }
 605         }
 606
 607         /*
 608          * platform call
 609          *
 610          * USB phy setup might depend on CPU/Board.
 611          * If platform has its callback functions,
 612          * call it here.
 613          */
 614         ret = usbhs_platform_call(priv, hardware_init, pdev);
 615         if (ret < 0) {
 616                 dev_err(&pdev->dev, "platform prove failed.\n");
 617                 goto probe_end_mod_exit;
 618         }
 619
 620         /* reset phy for connection */
 621         usbhs_platform_call(priv, phy_reset, pdev);
 622
 623         /* power control */
 624         pm_runtime_enable(&pdev->dev);
 625         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
 626                 usbhsc_power_ctrl(priv, 1);
 627                 usbhs_mod_autonomy_mode(priv);
 628         }
 629
 630         /*
 631          * manual call notify_hotplug for cold plug
 632          */
 633         ret = usbhsc_drvcllbck_notify_hotplug(pdev);
 634         if (ret < 0)
 635                 goto probe_end_call_remove;
 636
 637         dev_info(&pdev->dev, "probed\n");
 638
 639         return ret;
 640
 641 probe_end_call_remove:
 642         usbhs_platform_call(priv, hardware_exit, pdev);
 643 probe_end_mod_exit:
 644         usbhs_mod_remove(priv);
 645 probe_end_fifo_exit:
 646         usbhs_fifo_remove(priv);
 647 probe_end_pipe_exit:
 648         usbhs_pipe_remove(priv);
 649
 650         dev_info(&pdev->dev, "probe failed\n");
 651
 652         return ret;
 653 }
 654
 655 static int usbhs_remove(struct platform_device *pdev)
 656 {
 657         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 658         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 659         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
 660
 661         dev_dbg(&pdev->dev, "usb remove\n");
 662
 663         dfunc->notify_hotplug = NULL;
 664
 665         /* power off */
 666         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 667                 usbhsc_power_ctrl(priv, 0);
 668
 669         pm_runtime_disable(&pdev->dev);
 670
 671         usbhs_platform_call(priv, hardware_exit, pdev);
 672         usbhs_mod_remove(priv);
 673         usbhs_fifo_remove(priv);
 674         usbhs_pipe_remove(priv);
 675
 676         return 0;
 677 }
 678
 679 static int usbhsc_suspend(struct device *dev)
 680 {
 681         struct usbhs_priv *priv = dev_get_drvdata(dev);
 682         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 683
 684         if (mod) {
 685                 usbhs_mod_call(priv, stop, priv);
 686                 usbhs_mod_change(priv, -1);
 687         }
 688
 689         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 690                 usbhsc_power_ctrl(priv, 0);
 691
 692         return 0;
 693 }
 694
 695 static int usbhsc_resume(struct device *dev)
 696 {
 697         struct usbhs_priv *priv = dev_get_drvdata(dev);
 698         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 699
 700         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 701                 usbhsc_power_ctrl(priv, 1);
 702
 703         usbhs_platform_call(priv, phy_reset, pdev);
 704
 705         usbhsc_drvcllbck_notify_hotplug(pdev);
 706
 707         return 0;
 708 }
 709
 710 static int usbhsc_runtime_nop(struct device *dev)
 711 {
 712         /* Runtime PM callback shared between ->runtime_suspend()
 713          * and ->runtime_resume(). Simply returns success.
 714          *
 715          * This driver re-initializes all registers after
 716          * pm_runtime_get_sync() anyway so there is no need
 717          * to save and restore registers here.
 718          */
 719         return 0;
 720 }
 721
 722 static const struct dev_pm_ops usbhsc_pm_ops = {
 723         .suspend                = usbhsc_suspend,
 724         .resume                 = usbhsc_resume,
 725         .runtime_suspend        = usbhsc_runtime_nop,
 726         .runtime_resume         = usbhsc_runtime_nop,
 727 };
 728
 729 static struct platform_driver renesas_usbhs_driver = {
 730         .driver         = {
 731                 .name   = "renesas_usbhs",
 732                 .pm     = &usbhsc_pm_ops,
 733                 .of_match_table = of_match_ptr(usbhs_of_match),
 734         },
 735         .probe          = usbhs_probe,
 736         .remove         = usbhs_remove,
 737 };
 738
 739 module_platform_driver(renesas_usbhs_driver);
 740
 741 MODULE_LICENSE("GPL");
 742 MODULE_DESCRIPTION("Renesas USB driver");
 743 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");