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 struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
 306         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 307         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
 308         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
 309         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
 310         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
 311         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 312         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 313         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 314         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 315         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
 316 };
 317
 318 /* commonly used on newer SH-Mobile and R-Car SoCs */
 319 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
 320         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 321         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
 322         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
 323         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 324         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
 325         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
 326         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 327         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 328         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 329         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
 330         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
 331         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
 332         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
 333         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
 334         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
 335         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
 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                 .compatible = "renesas,rcar-gen2-usbhs",
 486                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 487         },
 488         {
 489                 /* Gen3 is compatible with Gen2 */
 490                 .compatible = "renesas,rcar-gen3-usbhs",
 491                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 492         },
 493         { },
 494 };
 495 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 496
 497 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
 498 {
 499         struct renesas_usbhs_platform_info *info;
 500         struct renesas_usbhs_driver_param *dparam;
 501         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
 502         u32 tmp;
 503         int gpio;
 504
 505         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 506         if (!info)
 507                 return NULL;
 508
 509         dparam = &info->driver_param;
 510         dparam->type = of_id ? (uintptr_t)of_id->data : 0;
 511         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
 512                 dparam->buswait_bwait = tmp;
 513         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
 514                                        NULL);
 515         if (gpio > 0)
 516                 dparam->enable_gpio = gpio;
 517
 518         if (dparam->type == USBHS_TYPE_RCAR_GEN2)
 519                 dparam->has_usb_dmac = 1;
 520
 521         return info;
 522 }
 523
 524 static int usbhs_probe(struct platform_device *pdev)
 525 {
 526         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 527         struct renesas_usbhs_driver_callback *dfunc;
 528         struct usbhs_priv *priv;
 529         struct resource *res, *irq_res;
 530         int ret;
 531
 532         /* check device node */
 533         if (pdev->dev.of_node)
 534                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
 535
 536         /* check platform information */
 537         if (!info) {
 538                 dev_err(&pdev->dev, "no platform information\n");
 539                 return -EINVAL;
 540         }
 541
 542         /* platform data */
 543         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 544         if (!irq_res) {
 545                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
 546                 return -ENODEV;
 547         }
 548
 549         /* usb private data */
 550         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 551         if (!priv)
 552                 return -ENOMEM;
 553
 554         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 555         priv->base = devm_ioremap_resource(&pdev->dev, res);
 556         if (IS_ERR(priv->base))
 557                 return PTR_ERR(priv->base);
 558
 559         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
 560                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
 561                 if (IS_ERR(priv->edev))
 562                         return PTR_ERR(priv->edev);
 563         }
 564
 565         /*
 566          * care platform info
 567          */
 568
 569         memcpy(&priv->dparam,
 570                &info->driver_param,
 571                sizeof(struct renesas_usbhs_driver_param));
 572
 573         switch (priv->dparam.type) {
 574         case USBHS_TYPE_RCAR_GEN2:
 575                 priv->pfunc = usbhs_rcar2_ops;
 576                 if (!priv->dparam.pipe_configs) {
 577                         priv->dparam.pipe_configs = usbhsc_new_pipe;
 578                         priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 579                 }
 580                 break;
 581         default:
 582                 if (!info->platform_callback.get_id) {
 583                         dev_err(&pdev->dev, "no platform callbacks");
 584                         return -EINVAL;
 585                 }
 586                 memcpy(&priv->pfunc,
 587                        &info->platform_callback,
 588                        sizeof(struct renesas_usbhs_platform_callback));
 589                 break;
 590         }
 591
 592         /* set driver callback functions for platform */
 593         dfunc                   = &info->driver_callback;
 594         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
 595
 596         /* set default param if platform doesn't have */
 597         if (!priv->dparam.pipe_configs) {
 598                 priv->dparam.pipe_configs = usbhsc_default_pipe;
 599                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
 600         }
 601         if (!priv->dparam.pio_dma_border)
 602                 priv->dparam.pio_dma_border = 64; /* 64byte */
 603
 604         /* FIXME */
 605         /* runtime power control ? */
 606         if (priv->pfunc.get_vbus)
 607                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
 608
 609         /*
 610          * priv settings
 611          */
 612         priv->irq       = irq_res->start;
 613         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
 614                 priv->irqflags = IRQF_SHARED;
 615         priv->pdev      = pdev;
 616         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 617         spin_lock_init(usbhs_priv_to_lock(priv));
 618
 619         /* call pipe and module init */
 620         ret = usbhs_pipe_probe(priv);
 621         if (ret < 0)
 622                 return ret;
 623
 624         ret = usbhs_fifo_probe(priv);
 625         if (ret < 0)
 626                 goto probe_end_pipe_exit;
 627
 628         ret = usbhs_mod_probe(priv);
 629         if (ret < 0)
 630                 goto probe_end_fifo_exit;
 631
 632         /* dev_set_drvdata should be called after usbhs_mod_init */
 633         platform_set_drvdata(pdev, priv);
 634
 635         /*
 636          * deviece reset here because
 637          * USB device might be used in boot loader.
 638          */
 639         usbhs_sys_clock_ctrl(priv, 0);
 640
 641         /* check GPIO determining if USB function should be enabled */
 642         if (priv->dparam.enable_gpio) {
 643                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
 644                 ret = !gpio_get_value(priv->dparam.enable_gpio);
 645                 gpio_free(priv->dparam.enable_gpio);
 646                 if (ret) {
 647                         dev_warn(&pdev->dev,
 648                                  "USB function not selected (GPIO %d)\n",
 649                                  priv->dparam.enable_gpio);
 650                         ret = -ENOTSUPP;
 651                         goto probe_end_mod_exit;
 652                 }
 653         }
 654
 655         /*
 656          * platform call
 657          *
 658          * USB phy setup might depend on CPU/Board.
 659          * If platform has its callback functions,
 660          * call it here.
 661          */
 662         ret = usbhs_platform_call(priv, hardware_init, pdev);
 663         if (ret < 0) {
 664                 dev_err(&pdev->dev, "platform init failed.\n");
 665                 goto probe_end_mod_exit;
 666         }
 667
 668         /* reset phy for connection */
 669         usbhs_platform_call(priv, phy_reset, pdev);
 670
 671         /* power control */
 672         pm_runtime_enable(&pdev->dev);
 673         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
 674                 usbhsc_power_ctrl(priv, 1);
 675                 usbhs_mod_autonomy_mode(priv);
 676         }
 677
 678         /*
 679          * manual call notify_hotplug for cold plug
 680          */
 681         usbhsc_drvcllbck_notify_hotplug(pdev);
 682
 683         dev_info(&pdev->dev, "probed\n");
 684
 685         return ret;
 686
 687 probe_end_mod_exit:
 688         usbhs_mod_remove(priv);
 689 probe_end_fifo_exit:
 690         usbhs_fifo_remove(priv);
 691 probe_end_pipe_exit:
 692         usbhs_pipe_remove(priv);
 693
 694         dev_info(&pdev->dev, "probe failed\n");
 695
 696         return ret;
 697 }
 698
 699 static int usbhs_remove(struct platform_device *pdev)
 700 {
 701         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 702         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 703         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
 704
 705         dev_dbg(&pdev->dev, "usb remove\n");
 706
 707         dfunc->notify_hotplug = NULL;
 708
 709         /* power off */
 710         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 711                 usbhsc_power_ctrl(priv, 0);
 712
 713         pm_runtime_disable(&pdev->dev);
 714
 715         usbhs_platform_call(priv, hardware_exit, pdev);
 716         usbhs_mod_remove(priv);
 717         usbhs_fifo_remove(priv);
 718         usbhs_pipe_remove(priv);
 719
 720         return 0;
 721 }
 722
 723 static int usbhsc_suspend(struct device *dev)
 724 {
 725         struct usbhs_priv *priv = dev_get_drvdata(dev);
 726         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 727
 728         if (mod) {
 729                 usbhs_mod_call(priv, stop, priv);
 730                 usbhs_mod_change(priv, -1);
 731         }
 732
 733         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 734                 usbhsc_power_ctrl(priv, 0);
 735
 736         return 0;
 737 }
 738
 739 static int usbhsc_resume(struct device *dev)
 740 {
 741         struct usbhs_priv *priv = dev_get_drvdata(dev);
 742         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 743
 744         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 745                 usbhsc_power_ctrl(priv, 1);
 746
 747         usbhs_platform_call(priv, phy_reset, pdev);
 748
 749         usbhsc_drvcllbck_notify_hotplug(pdev);
 750
 751         return 0;
 752 }
 753
 754 static int usbhsc_runtime_nop(struct device *dev)
 755 {
 756         /* Runtime PM callback shared between ->runtime_suspend()
 757          * and ->runtime_resume(). Simply returns success.
 758          *
 759          * This driver re-initializes all registers after
 760          * pm_runtime_get_sync() anyway so there is no need
 761          * to save and restore registers here.
 762          */
 763         return 0;
 764 }
 765
 766 static const struct dev_pm_ops usbhsc_pm_ops = {
 767         .suspend                = usbhsc_suspend,
 768         .resume                 = usbhsc_resume,
 769         .runtime_suspend        = usbhsc_runtime_nop,
 770         .runtime_resume         = usbhsc_runtime_nop,
 771 };
 772
 773 static struct platform_driver renesas_usbhs_driver = {
 774         .driver         = {
 775                 .name   = "renesas_usbhs",
 776                 .pm     = &usbhsc_pm_ops,
 777                 .of_match_table = of_match_ptr(usbhs_of_match),
 778         },
 779         .probe          = usbhs_probe,
 780         .remove         = usbhs_remove,
 781 };
 782
 783 module_platform_driver(renesas_usbhs_driver);
 784
 785 MODULE_LICENSE("GPL");
 786 MODULE_DESCRIPTION("Renesas USB driver");
 787 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");