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 #include "rcar3.h"
  29
  30 /*
  31  *              image of renesas_usbhs
  32  *
  33  * ex) gadget case
  34
  35  * mod.c
  36  * mod_gadget.c
  37  * mod_host.c           pipe.c          fifo.c
  38  *
  39  *                      +-------+       +-----------+
  40  *                      | pipe0 |------>| fifo pio  |
  41  * +------------+       +-------+       +-----------+
  42  * | mod_gadget |=====> | pipe1 |--+
  43  * +------------+       +-------+  |    +-----------+
  44  *                      | pipe2 |  |  +-| fifo dma0 |
  45  * +------------+       +-------+  |  | +-----------+
  46  * | mod_host   |       | pipe3 |<-|--+
  47  * +------------+       +-------+  |    +-----------+
  48  *                      | ....  |  +--->| fifo dma1 |
  49  *                      | ....  |       +-----------+
  50  */
  51
  52
  53 #define USBHSF_RUNTIME_PWCTRL   (1 << 0)
  54
  55 /* status */
  56 #define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
  57 #define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
  58 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
  59 #define usbhsc_flags_has(p, b) ((p)->flags &   (b))
  60
  61 /*
  62  * platform call back
  63  *
  64  * renesas usb support platform callback function.
  65  * Below macro call it.
  66  * if platform doesn't have callback, it return 0 (no error)
  67  */
  68 #define usbhs_platform_call(priv, func, args...)\
  69         (!(priv) ? -ENODEV :                    \
  70          !((priv)->pfunc.func) ? 0 :            \
  71          (priv)->pfunc.func(args))
  72
  73 /*
  74  *              common functions
  75  */
  76 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
  77 {
  78         return ioread16(priv->base + reg);
  79 }
  80
  81 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
  82 {
  83         iowrite16(data, priv->base + reg);
  84 }
  85
  86 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
  87 {
  88         u16 val = usbhs_read(priv, reg);
  89
  90         val &= ~mask;
  91         val |= data & mask;
  92
  93         usbhs_write(priv, reg, val);
  94 }
  95
  96 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
  97 {
  98         return dev_get_drvdata(&pdev->dev);
  99 }
 100
 101 /*
 102  *              syscfg functions
 103  */
 104 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
 105 {
 106         usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
 107 }
 108
 109 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 110 {
 111         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 112         u16 val  = DCFM | DRPD | HSE | USBE;
 113         int has_otg = usbhs_get_dparam(priv, has_otg);
 114
 115         if (has_otg)
 116                 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
 117
 118         /*
 119          * if enable
 120          *
 121          * - select Host mode
 122          * - D+ Line/D- Line Pull-down
 123          */
 124         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 125 }
 126
 127 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
 128 {
 129         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 130         u16 val  = HSE | USBE;
 131
 132         /*
 133          * if enable
 134          *
 135          * - select Function mode
 136          * - D+ Line Pull-up is disabled
 137          *      When D+ Line Pull-up is enabled,
 138          *      calling usbhs_sys_function_pullup(,1)
 139          */
 140         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 141 }
 142
 143 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
 144 {
 145         usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
 146 }
 147
 148 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
 149 {
 150         usbhs_write(priv, TESTMODE, mode);
 151 }
 152
 153 /*
 154  *              frame functions
 155  */
 156 int usbhs_frame_get_num(struct usbhs_priv *priv)
 157 {
 158         return usbhs_read(priv, FRMNUM) & FRNM_MASK;
 159 }
 160
 161 /*
 162  *              usb request functions
 163  */
 164 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 165 {
 166         u16 val;
 167
 168         val = usbhs_read(priv, USBREQ);
 169         req->bRequest           = (val >> 8) & 0xFF;
 170         req->bRequestType       = (val >> 0) & 0xFF;
 171
 172         req->wValue     = usbhs_read(priv, USBVAL);
 173         req->wIndex     = usbhs_read(priv, USBINDX);
 174         req->wLength    = usbhs_read(priv, USBLENG);
 175 }
 176
 177 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 178 {
 179         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
 180         usbhs_write(priv, USBVAL,  req->wValue);
 181         usbhs_write(priv, USBINDX, req->wIndex);
 182         usbhs_write(priv, USBLENG, req->wLength);
 183
 184         usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
 185 }
 186
 187 /*
 188  *              bus/vbus functions
 189  */
 190 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
 191 {
 192         u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
 193
 194         if (status != USBRST) {
 195                 struct device *dev = usbhs_priv_to_dev(priv);
 196                 dev_err(dev, "usbhs should be reset\n");
 197         }
 198
 199         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
 200 }
 201
 202 void usbhs_bus_send_reset(struct usbhs_priv *priv)
 203 {
 204         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
 205 }
 206
 207 int usbhs_bus_get_speed(struct usbhs_priv *priv)
 208 {
 209         u16 dvstctr = usbhs_read(priv, DVSTCTR);
 210
 211         switch (RHST & dvstctr) {
 212         case RHST_LOW_SPEED:
 213                 return USB_SPEED_LOW;
 214         case RHST_FULL_SPEED:
 215                 return USB_SPEED_FULL;
 216         case RHST_HIGH_SPEED:
 217                 return USB_SPEED_HIGH;
 218         }
 219
 220         return USB_SPEED_UNKNOWN;
 221 }
 222
 223 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
 224 {
 225         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 226
 227         return usbhs_platform_call(priv, set_vbus, pdev, enable);
 228 }
 229
 230 static void usbhsc_bus_init(struct usbhs_priv *priv)
 231 {
 232         usbhs_write(priv, DVSTCTR, 0);
 233
 234         usbhs_vbus_ctrl(priv, 0);
 235 }
 236
 237 /*
 238  *              device configuration
 239  */
 240 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
 241                            u16 upphub, u16 hubport, u16 speed)
 242 {
 243         struct device *dev = usbhs_priv_to_dev(priv);
 244         u16 usbspd = 0;
 245         u32 reg = DEVADD0 + (2 * devnum);
 246
 247         if (devnum > 10) {
 248                 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
 249                 return -EIO;
 250         }
 251
 252         if (upphub > 0xA) {
 253                 dev_err(dev, "unsupported hub number %d\n", upphub);
 254                 return -EIO;
 255         }
 256
 257         switch (speed) {
 258         case USB_SPEED_LOW:
 259                 usbspd = USBSPD_SPEED_LOW;
 260                 break;
 261         case USB_SPEED_FULL:
 262                 usbspd = USBSPD_SPEED_FULL;
 263                 break;
 264         case USB_SPEED_HIGH:
 265                 usbspd = USBSPD_SPEED_HIGH;
 266                 break;
 267         default:
 268                 dev_err(dev, "unsupported speed %d\n", speed);
 269                 return -EIO;
 270         }
 271
 272         usbhs_write(priv, reg,  UPPHUB(upphub)  |
 273                                 HUBPORT(hubport)|
 274                                 USBSPD(usbspd));
 275
 276         return 0;
 277 }
 278
 279 /*
 280  *              interrupt functions
 281  */
 282 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
 283 {
 284         u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
 285
 286         usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
 287 }
 288
 289 /*
 290  *              local functions
 291  */
 292 static void usbhsc_set_buswait(struct usbhs_priv *priv)
 293 {
 294         int wait = usbhs_get_dparam(priv, buswait_bwait);
 295
 296         /* set bus wait if platform have */
 297         if (wait)
 298                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
 299 }
 300
 301 /*
 302  *              platform default param
 303  */
 304
 305 /* commonly used on old SH-Mobile SoCs */
 306 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
 307         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 308         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
 309         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
 310         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
 311         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
 312         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 313         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 314         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 315         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 316         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
 317 };
 318
 319 /* commonly used on newer SH-Mobile and R-Car SoCs */
 320 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
 321         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 322         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
 323         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
 324         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 325         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
 326         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
 327         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 328         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 329         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 330         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
 331         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
 332         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
 333         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
 334         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
 335         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
 336         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
 337 };
 338
 339 /*
 340  *              power control
 341  */
 342 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 343 {
 344         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 345         struct device *dev = usbhs_priv_to_dev(priv);
 346
 347         if (enable) {
 348                 /* enable PM */
 349                 pm_runtime_get_sync(dev);
 350
 351                 /* enable platform power */
 352                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 353
 354                 /* USB on */
 355                 usbhs_sys_clock_ctrl(priv, enable);
 356         } else {
 357                 /* USB off */
 358                 usbhs_sys_clock_ctrl(priv, enable);
 359
 360                 /* disable platform power */
 361                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 362
 363                 /* disable PM */
 364                 pm_runtime_put_sync(dev);
 365         }
 366 }
 367
 368 /*
 369  *              hotplug
 370  */
 371 static void usbhsc_hotplug(struct usbhs_priv *priv)
 372 {
 373         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 374         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 375         int id;
 376         int enable;
 377         int cable;
 378         int ret;
 379
 380         /*
 381          * get vbus status from platform
 382          */
 383         enable = usbhs_platform_call(priv, get_vbus, pdev);
 384
 385         /*
 386          * get id from platform
 387          */
 388         id = usbhs_platform_call(priv, get_id, pdev);
 389
 390         if (enable && !mod) {
 391                 if (priv->edev) {
 392                         cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
 393                         if ((cable > 0 && id != USBHS_HOST) ||
 394                             (!cable && id != USBHS_GADGET)) {
 395                                 dev_info(&pdev->dev,
 396                                          "USB cable plugged in doesn't match the selected role!\n");
 397                                 return;
 398                         }
 399                 }
 400
 401                 ret = usbhs_mod_change(priv, id);
 402                 if (ret < 0)
 403                         return;
 404
 405                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
 406
 407                 /* power on */
 408                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 409                         usbhsc_power_ctrl(priv, enable);
 410
 411                 /* bus init */
 412                 usbhsc_set_buswait(priv);
 413                 usbhsc_bus_init(priv);
 414
 415                 /* module start */
 416                 usbhs_mod_call(priv, start, priv);
 417
 418         } else if (!enable && mod) {
 419                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
 420
 421                 /* module stop */
 422                 usbhs_mod_call(priv, stop, priv);
 423
 424                 /* bus init */
 425                 usbhsc_bus_init(priv);
 426
 427                 /* power off */
 428                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 429                         usbhsc_power_ctrl(priv, enable);
 430
 431                 usbhs_mod_change(priv, -1);
 432
 433                 /* reset phy for next connection */
 434                 usbhs_platform_call(priv, phy_reset, pdev);
 435         }
 436 }
 437
 438 /*
 439  *              notify hotplug
 440  */
 441 static void usbhsc_notify_hotplug(struct work_struct *work)
 442 {
 443         struct usbhs_priv *priv = container_of(work,
 444                                                struct usbhs_priv,
 445                                                notify_hotplug_work.work);
 446         usbhsc_hotplug(priv);
 447 }
 448
 449 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 450 {
 451         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 452         int delay = usbhs_get_dparam(priv, detection_delay);
 453
 454         /*
 455          * This functions will be called in interrupt.
 456          * To make sure safety context,
 457          * use workqueue for usbhs_notify_hotplug
 458          */
 459         schedule_delayed_work(&priv->notify_hotplug_work,
 460                               msecs_to_jiffies(delay));
 461         return 0;
 462 }
 463
 464 /*
 465  *              platform functions
 466  */
 467 static const struct of_device_id usbhs_of_match[] = {
 468         {
 469                 .compatible = "renesas,usbhs-r8a7790",
 470                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 471         },
 472         {
 473                 .compatible = "renesas,usbhs-r8a7791",
 474                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 475         },
 476         {
 477                 .compatible = "renesas,usbhs-r8a7794",
 478                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 479         },
 480         {
 481                 .compatible = "renesas,usbhs-r8a7795",
 482                 .data = (void *)USBHS_TYPE_RCAR_GEN3,
 483         },
 484         {
 485                 .compatible = "renesas,usbhs-r8a7796",
 486                 .data = (void *)USBHS_TYPE_RCAR_GEN3,
 487         },
 488         {
 489                 .compatible = "renesas,rcar-gen2-usbhs",
 490                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 491         },
 492         {
 493                 .compatible = "renesas,rcar-gen3-usbhs",
 494                 .data = (void *)USBHS_TYPE_RCAR_GEN3,
 495         },
 496         { },
 497 };
 498 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 499
 500 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
 501 {
 502         struct renesas_usbhs_platform_info *info;
 503         struct renesas_usbhs_driver_param *dparam;
 504         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
 505         u32 tmp;
 506         int gpio;
 507
 508         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 509         if (!info)
 510                 return NULL;
 511
 512         dparam = &info->driver_param;
 513         dparam->type = of_id ? (uintptr_t)of_id->data : 0;
 514         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
 515                 dparam->buswait_bwait = tmp;
 516         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
 517                                        NULL);
 518         if (gpio > 0)
 519                 dparam->enable_gpio = gpio;
 520
 521         if (dparam->type == USBHS_TYPE_RCAR_GEN2 ||
 522             dparam->type == USBHS_TYPE_RCAR_GEN3)
 523                 dparam->has_usb_dmac = 1;
 524
 525         return info;
 526 }
 527
 528 static int usbhs_probe(struct platform_device *pdev)
 529 {
 530         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 531         struct renesas_usbhs_driver_callback *dfunc;
 532         struct usbhs_priv *priv;
 533         struct resource *res, *irq_res;
 534         int ret;
 535
 536         /* check device node */
 537         if (pdev->dev.of_node)
 538                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
 539
 540         /* check platform information */
 541         if (!info) {
 542                 dev_err(&pdev->dev, "no platform information\n");
 543                 return -EINVAL;
 544         }
 545
 546         /* platform data */
 547         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 548         if (!irq_res) {
 549                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
 550                 return -ENODEV;
 551         }
 552
 553         /* usb private data */
 554         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 555         if (!priv)
 556                 return -ENOMEM;
 557
 558         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 559         priv->base = devm_ioremap_resource(&pdev->dev, res);
 560         if (IS_ERR(priv->base))
 561                 return PTR_ERR(priv->base);
 562
 563         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
 564                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
 565                 if (IS_ERR(priv->edev))
 566                         return PTR_ERR(priv->edev);
 567         }
 568
 569         /*
 570          * care platform info
 571          */
 572
 573         memcpy(&priv->dparam,
 574                &info->driver_param,
 575                sizeof(struct renesas_usbhs_driver_param));
 576
 577         switch (priv->dparam.type) {
 578         case USBHS_TYPE_RCAR_GEN2:
 579                 priv->pfunc = usbhs_rcar2_ops;
 580                 if (!priv->dparam.pipe_configs) {
 581                         priv->dparam.pipe_configs = usbhsc_new_pipe;
 582                         priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 583                 }
 584                 break;
 585         case USBHS_TYPE_RCAR_GEN3:
 586                 priv->pfunc = usbhs_rcar3_ops;
 587                 if (!priv->dparam.pipe_configs) {
 588                         priv->dparam.pipe_configs = usbhsc_new_pipe;
 589                         priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 590                 }
 591                 break;
 592         default:
 593                 if (!info->platform_callback.get_id) {
 594                         dev_err(&pdev->dev, "no platform callbacks");
 595                         return -EINVAL;
 596                 }
 597                 memcpy(&priv->pfunc,
 598                        &info->platform_callback,
 599                        sizeof(struct renesas_usbhs_platform_callback));
 600                 break;
 601         }
 602
 603         /* set driver callback functions for platform */
 604         dfunc                   = &info->driver_callback;
 605         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
 606
 607         /* set default param if platform doesn't have */
 608         if (!priv->dparam.pipe_configs) {
 609                 priv->dparam.pipe_configs = usbhsc_default_pipe;
 610                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
 611         }
 612         if (!priv->dparam.pio_dma_border)
 613                 priv->dparam.pio_dma_border = 64; /* 64byte */
 614
 615         /* FIXME */
 616         /* runtime power control ? */
 617         if (priv->pfunc.get_vbus)
 618                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
 619
 620         /*
 621          * priv settings
 622          */
 623         priv->irq       = irq_res->start;
 624         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
 625                 priv->irqflags = IRQF_SHARED;
 626         priv->pdev      = pdev;
 627         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 628         spin_lock_init(usbhs_priv_to_lock(priv));
 629
 630         /* call pipe and module init */
 631         ret = usbhs_pipe_probe(priv);
 632         if (ret < 0)
 633                 return ret;
 634
 635         ret = usbhs_fifo_probe(priv);
 636         if (ret < 0)
 637                 goto probe_end_pipe_exit;
 638
 639         ret = usbhs_mod_probe(priv);
 640         if (ret < 0)
 641                 goto probe_end_fifo_exit;
 642
 643         /* dev_set_drvdata should be called after usbhs_mod_init */
 644         platform_set_drvdata(pdev, priv);
 645
 646         /*
 647          * deviece reset here because
 648          * USB device might be used in boot loader.
 649          */
 650         usbhs_sys_clock_ctrl(priv, 0);
 651
 652         /* check GPIO determining if USB function should be enabled */
 653         if (priv->dparam.enable_gpio) {
 654                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
 655                 ret = !gpio_get_value(priv->dparam.enable_gpio);
 656                 gpio_free(priv->dparam.enable_gpio);
 657                 if (ret) {
 658                         dev_warn(&pdev->dev,
 659                                  "USB function not selected (GPIO %d)\n",
 660                                  priv->dparam.enable_gpio);
 661                         ret = -ENOTSUPP;
 662                         goto probe_end_mod_exit;
 663                 }
 664         }
 665
 666         /*
 667          * platform call
 668          *
 669          * USB phy setup might depend on CPU/Board.
 670          * If platform has its callback functions,
 671          * call it here.
 672          */
 673         ret = usbhs_platform_call(priv, hardware_init, pdev);
 674         if (ret < 0) {
 675                 dev_err(&pdev->dev, "platform init failed.\n");
 676                 goto probe_end_mod_exit;
 677         }
 678
 679         /* reset phy for connection */
 680         usbhs_platform_call(priv, phy_reset, pdev);
 681
 682         /* power control */
 683         pm_runtime_enable(&pdev->dev);
 684         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
 685                 usbhsc_power_ctrl(priv, 1);
 686                 usbhs_mod_autonomy_mode(priv);
 687         }
 688
 689         /*
 690          * manual call notify_hotplug for cold plug
 691          */
 692         usbhsc_drvcllbck_notify_hotplug(pdev);
 693
 694         dev_info(&pdev->dev, "probed\n");
 695
 696         return ret;
 697
 698 probe_end_mod_exit:
 699         usbhs_mod_remove(priv);
 700 probe_end_fifo_exit:
 701         usbhs_fifo_remove(priv);
 702 probe_end_pipe_exit:
 703         usbhs_pipe_remove(priv);
 704
 705         dev_info(&pdev->dev, "probe failed (%d)\n", ret);
 706
 707         return ret;
 708 }
 709
 710 static int usbhs_remove(struct platform_device *pdev)
 711 {
 712         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 713         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
 714         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
 715
 716         dev_dbg(&pdev->dev, "usb remove\n");
 717
 718         dfunc->notify_hotplug = NULL;
 719
 720         /* power off */
 721         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 722                 usbhsc_power_ctrl(priv, 0);
 723
 724         pm_runtime_disable(&pdev->dev);
 725
 726         usbhs_platform_call(priv, hardware_exit, pdev);
 727         usbhs_mod_remove(priv);
 728         usbhs_fifo_remove(priv);
 729         usbhs_pipe_remove(priv);
 730
 731         return 0;
 732 }
 733
 734 static int usbhsc_suspend(struct device *dev)
 735 {
 736         struct usbhs_priv *priv = dev_get_drvdata(dev);
 737         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 738
 739         if (mod) {
 740                 usbhs_mod_call(priv, stop, priv);
 741                 usbhs_mod_change(priv, -1);
 742         }
 743
 744         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 745                 usbhsc_power_ctrl(priv, 0);
 746
 747         return 0;
 748 }
 749
 750 static int usbhsc_resume(struct device *dev)
 751 {
 752         struct usbhs_priv *priv = dev_get_drvdata(dev);
 753         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 754
 755         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 756                 usbhsc_power_ctrl(priv, 1);
 757
 758         usbhs_platform_call(priv, phy_reset, pdev);
 759
 760         usbhsc_drvcllbck_notify_hotplug(pdev);
 761
 762         return 0;
 763 }
 764
 765 static int usbhsc_runtime_nop(struct device *dev)
 766 {
 767         /* Runtime PM callback shared between ->runtime_suspend()
 768          * and ->runtime_resume(). Simply returns success.
 769          *
 770          * This driver re-initializes all registers after
 771          * pm_runtime_get_sync() anyway so there is no need
 772          * to save and restore registers here.
 773          */
 774         return 0;
 775 }
 776
 777 static const struct dev_pm_ops usbhsc_pm_ops = {
 778         .suspend                = usbhsc_suspend,
 779         .resume                 = usbhsc_resume,
 780         .runtime_suspend        = usbhsc_runtime_nop,
 781         .runtime_resume         = usbhsc_runtime_nop,
 782 };
 783
 784 static struct platform_driver renesas_usbhs_driver = {
 785         .driver         = {
 786                 .name   = "renesas_usbhs",
 787                 .pm     = &usbhsc_pm_ops,
 788                 .of_match_table = of_match_ptr(usbhs_of_match),
 789         },
 790         .probe          = usbhs_probe,
 791         .remove         = usbhs_remove,
 792 };
 793
 794 module_platform_driver(renesas_usbhs_driver);
 795
 796 MODULE_LICENSE("GPL");
 797 MODULE_DESCRIPTION("Renesas USB driver");
 798 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");