drivers/usb/renesas_usbhs/common.c

   1 // SPDX-License-Identifier: GPL-1.0+
   2 /*
   3  * Renesas USB driver
   4  *
   5  * Copyright (C) 2011 Renesas Solutions Corp.
   6  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   7  */
   8 #include <linux/clk.h>
   9 #include <linux/err.h>
  10 #include <linux/gpio.h>
  11 #include <linux/io.h>
  12 #include <linux/module.h>
  13 #include <linux/of_device.h>
  14 #include <linux/of_gpio.h>
  15 #include <linux/pm_runtime.h>
  16 #include <linux/reset.h>
  17 #include <linux/slab.h>
  18 #include <linux/sysfs.h>
  19 #include "common.h"
  20 #include "rcar2.h"
  21 #include "rcar3.h"
  22 #include "rza.h"
  23
  24 /*
  25  *              image of renesas_usbhs
  26  *
  27  * ex) gadget case
  28
  29  * mod.c
  30  * mod_gadget.c
  31  * mod_host.c           pipe.c          fifo.c
  32  *
  33  *                      +-------+       +-----------+
  34  *                      | pipe0 |------>| fifo pio  |
  35  * +------------+       +-------+       +-----------+
  36  * | mod_gadget |=====> | pipe1 |--+
  37  * +------------+       +-------+  |    +-----------+
  38  *                      | pipe2 |  |  +-| fifo dma0 |
  39  * +------------+       +-------+  |  | +-----------+
  40  * | mod_host   |       | pipe3 |<-|--+
  41  * +------------+       +-------+  |    +-----------+
  42  *                      | ....  |  +--->| fifo dma1 |
  43  *                      | ....  |       +-----------+
  44  */
  45
  46
  47 #define USBHSF_RUNTIME_PWCTRL   (1 << 0)
  48
  49 /* status */
  50 #define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
  51 #define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
  52 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
  53 #define usbhsc_flags_has(p, b) ((p)->flags &   (b))
  54
  55 /*
  56  * platform call back
  57  *
  58  * renesas usb support platform callback function.
  59  * Below macro call it.
  60  * if platform doesn't have callback, it return 0 (no error)
  61  */
  62 #define usbhs_platform_call(priv, func, args...)\
  63         (!(priv) ? -ENODEV :                    \
  64          !((priv)->pfunc.func) ? 0 :            \
  65          (priv)->pfunc.func(args))
  66
  67 /*
  68  *              common functions
  69  */
  70 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
  71 {
  72         return ioread16(priv->base + reg);
  73 }
  74
  75 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
  76 {
  77         iowrite16(data, priv->base + reg);
  78 }
  79
  80 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
  81 {
  82         u16 val = usbhs_read(priv, reg);
  83
  84         val &= ~mask;
  85         val |= data & mask;
  86
  87         usbhs_write(priv, reg, val);
  88 }
  89
  90 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
  91 {
  92         return dev_get_drvdata(&pdev->dev);
  93 }
  94
  95 /*
  96  *              syscfg functions
  97  */
  98 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
  99 {
 100         usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
 101 }
 102
 103 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 104 {
 105         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 106         u16 val  = DCFM | DRPD | HSE | USBE;
 107         int has_otg = usbhs_get_dparam(priv, has_otg);
 108
 109         if (has_otg)
 110                 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
 111
 112         /*
 113          * if enable
 114          *
 115          * - select Host mode
 116          * - D+ Line/D- Line Pull-down
 117          */
 118         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 119 }
 120
 121 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
 122 {
 123         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 124         u16 val  = HSE | USBE;
 125
 126         /*
 127          * if enable
 128          *
 129          * - select Function mode
 130          * - D+ Line Pull-up is disabled
 131          *      When D+ Line Pull-up is enabled,
 132          *      calling usbhs_sys_function_pullup(,1)
 133          */
 134         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 135 }
 136
 137 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
 138 {
 139         usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
 140 }
 141
 142 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
 143 {
 144         usbhs_write(priv, TESTMODE, mode);
 145 }
 146
 147 /*
 148  *              frame functions
 149  */
 150 int usbhs_frame_get_num(struct usbhs_priv *priv)
 151 {
 152         return usbhs_read(priv, FRMNUM) & FRNM_MASK;
 153 }
 154
 155 /*
 156  *              usb request functions
 157  */
 158 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 159 {
 160         u16 val;
 161
 162         val = usbhs_read(priv, USBREQ);
 163         req->bRequest           = (val >> 8) & 0xFF;
 164         req->bRequestType       = (val >> 0) & 0xFF;
 165
 166         req->wValue     = usbhs_read(priv, USBVAL);
 167         req->wIndex     = usbhs_read(priv, USBINDX);
 168         req->wLength    = usbhs_read(priv, USBLENG);
 169 }
 170
 171 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 172 {
 173         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
 174         usbhs_write(priv, USBVAL,  req->wValue);
 175         usbhs_write(priv, USBINDX, req->wIndex);
 176         usbhs_write(priv, USBLENG, req->wLength);
 177
 178         usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
 179 }
 180
 181 /*
 182  *              bus/vbus functions
 183  */
 184 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
 185 {
 186         u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
 187
 188         if (status != USBRST) {
 189                 struct device *dev = usbhs_priv_to_dev(priv);
 190                 dev_err(dev, "usbhs should be reset\n");
 191         }
 192
 193         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
 194 }
 195
 196 void usbhs_bus_send_reset(struct usbhs_priv *priv)
 197 {
 198         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
 199 }
 200
 201 int usbhs_bus_get_speed(struct usbhs_priv *priv)
 202 {
 203         u16 dvstctr = usbhs_read(priv, DVSTCTR);
 204
 205         switch (RHST & dvstctr) {
 206         case RHST_LOW_SPEED:
 207                 return USB_SPEED_LOW;
 208         case RHST_FULL_SPEED:
 209                 return USB_SPEED_FULL;
 210         case RHST_HIGH_SPEED:
 211                 return USB_SPEED_HIGH;
 212         }
 213
 214         return USB_SPEED_UNKNOWN;
 215 }
 216
 217 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
 218 {
 219         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 220
 221         return usbhs_platform_call(priv, set_vbus, pdev, enable);
 222 }
 223
 224 static void usbhsc_bus_init(struct usbhs_priv *priv)
 225 {
 226         usbhs_write(priv, DVSTCTR, 0);
 227
 228         usbhs_vbus_ctrl(priv, 0);
 229 }
 230
 231 /*
 232  *              device configuration
 233  */
 234 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
 235                            u16 upphub, u16 hubport, u16 speed)
 236 {
 237         struct device *dev = usbhs_priv_to_dev(priv);
 238         u16 usbspd = 0;
 239         u32 reg = DEVADD0 + (2 * devnum);
 240
 241         if (devnum > 10) {
 242                 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
 243                 return -EIO;
 244         }
 245
 246         if (upphub > 0xA) {
 247                 dev_err(dev, "unsupported hub number %d\n", upphub);
 248                 return -EIO;
 249         }
 250
 251         switch (speed) {
 252         case USB_SPEED_LOW:
 253                 usbspd = USBSPD_SPEED_LOW;
 254                 break;
 255         case USB_SPEED_FULL:
 256                 usbspd = USBSPD_SPEED_FULL;
 257                 break;
 258         case USB_SPEED_HIGH:
 259                 usbspd = USBSPD_SPEED_HIGH;
 260                 break;
 261         default:
 262                 dev_err(dev, "unsupported speed %d\n", speed);
 263                 return -EIO;
 264         }
 265
 266         usbhs_write(priv, reg,  UPPHUB(upphub)  |
 267                                 HUBPORT(hubport)|
 268                                 USBSPD(usbspd));
 269
 270         return 0;
 271 }
 272
 273 /*
 274  *              interrupt functions
 275  */
 276 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
 277 {
 278         u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
 279
 280         usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
 281 }
 282
 283 /*
 284  *              local functions
 285  */
 286 static void usbhsc_set_buswait(struct usbhs_priv *priv)
 287 {
 288         int wait = usbhs_get_dparam(priv, buswait_bwait);
 289
 290         /* set bus wait if platform have */
 291         if (wait)
 292                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
 293 }
 294
 295 static bool usbhsc_is_multi_clks(struct usbhs_priv *priv)
 296 {
 297         if (priv->dparam.type == USBHS_TYPE_RCAR_GEN3 ||
 298             priv->dparam.type == USBHS_TYPE_RCAR_GEN3_WITH_PLL)
 299                 return true;
 300
 301         return false;
 302 }
 303
 304 static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv)
 305 {
 306         if (!usbhsc_is_multi_clks(priv))
 307                 return 0;
 308
 309         /* The first clock should exist */
 310         priv->clks[0] = of_clk_get(dev->of_node, 0);
 311         if (IS_ERR(priv->clks[0]))
 312                 return PTR_ERR(priv->clks[0]);
 313
 314         /*
 315          * To backward compatibility with old DT, this driver checks the return
 316          * value if it's -ENOENT or not.
 317          */
 318         priv->clks[1] = of_clk_get(dev->of_node, 1);
 319         if (PTR_ERR(priv->clks[1]) == -ENOENT)
 320                 priv->clks[1] = NULL;
 321         else if (IS_ERR(priv->clks[1]))
 322                 return PTR_ERR(priv->clks[1]);
 323
 324         return 0;
 325 }
 326
 327 static void usbhsc_clk_put(struct usbhs_priv *priv)
 328 {
 329         int i;
 330
 331         if (!usbhsc_is_multi_clks(priv))
 332                 return;
 333
 334         for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
 335                 clk_put(priv->clks[i]);
 336 }
 337
 338 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv)
 339 {
 340         int i, ret;
 341
 342         if (!usbhsc_is_multi_clks(priv))
 343                 return 0;
 344
 345         for (i = 0; i < ARRAY_SIZE(priv->clks); i++) {
 346                 ret = clk_prepare_enable(priv->clks[i]);
 347                 if (ret) {
 348                         while (--i >= 0)
 349                                 clk_disable_unprepare(priv->clks[i]);
 350                         return ret;
 351                 }
 352         }
 353
 354         return ret;
 355 }
 356
 357 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv)
 358 {
 359         int i;
 360
 361         if (!usbhsc_is_multi_clks(priv))
 362                 return;
 363
 364         for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
 365                 clk_disable_unprepare(priv->clks[i]);
 366 }
 367
 368 /*
 369  *              platform default param
 370  */
 371
 372 /* commonly used on old SH-Mobile SoCs */
 373 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
 374         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 375         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
 376         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
 377         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
 378         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
 379         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 380         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 381         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 382         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 383         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
 384 };
 385
 386 /* commonly used on newer SH-Mobile and R-Car SoCs */
 387 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
 388         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 389         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
 390         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
 391         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 392         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
 393         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
 394         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 395         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 396         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 397         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
 398         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
 399         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
 400         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
 401         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
 402         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
 403         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
 404 };
 405
 406 /*
 407  *              power control
 408  */
 409 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 410 {
 411         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 412         struct device *dev = usbhs_priv_to_dev(priv);
 413
 414         if (enable) {
 415                 /* enable PM */
 416                 pm_runtime_get_sync(dev);
 417
 418                 /* enable clks */
 419                 if (usbhsc_clk_prepare_enable(priv))
 420                         return;
 421
 422                 /* enable platform power */
 423                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 424
 425                 /* USB on */
 426                 usbhs_sys_clock_ctrl(priv, enable);
 427         } else {
 428                 /* USB off */
 429                 usbhs_sys_clock_ctrl(priv, enable);
 430
 431                 /* disable platform power */
 432                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 433
 434                 /* disable clks */
 435                 usbhsc_clk_disable_unprepare(priv);
 436
 437                 /* disable PM */
 438                 pm_runtime_put_sync(dev);
 439         }
 440 }
 441
 442 /*
 443  *              hotplug
 444  */
 445 static void usbhsc_hotplug(struct usbhs_priv *priv)
 446 {
 447         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 448         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 449         int id;
 450         int enable;
 451         int cable;
 452         int ret;
 453
 454         /*
 455          * get vbus status from platform
 456          */
 457         enable = usbhs_platform_call(priv, get_vbus, pdev);
 458
 459         /*
 460          * get id from platform
 461          */
 462         id = usbhs_platform_call(priv, get_id, pdev);
 463
 464         if (enable && !mod) {
 465                 if (priv->edev) {
 466                         cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
 467                         if ((cable > 0 && id != USBHS_HOST) ||
 468                             (!cable && id != USBHS_GADGET)) {
 469                                 dev_info(&pdev->dev,
 470                                          "USB cable plugged in doesn't match the selected role!\n");
 471                                 return;
 472                         }
 473                 }
 474
 475                 ret = usbhs_mod_change(priv, id);
 476                 if (ret < 0)
 477                         return;
 478
 479                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
 480
 481                 /* power on */
 482                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 483                         usbhsc_power_ctrl(priv, enable);
 484
 485                 /* bus init */
 486                 usbhsc_set_buswait(priv);
 487                 usbhsc_bus_init(priv);
 488
 489                 /* module start */
 490                 usbhs_mod_call(priv, start, priv);
 491
 492         } else if (!enable && mod) {
 493                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
 494
 495                 /* module stop */
 496                 usbhs_mod_call(priv, stop, priv);
 497
 498                 /* bus init */
 499                 usbhsc_bus_init(priv);
 500
 501                 /* power off */
 502                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 503                         usbhsc_power_ctrl(priv, enable);
 504
 505                 usbhs_mod_change(priv, -1);
 506
 507                 /* reset phy for next connection */
 508                 usbhs_platform_call(priv, phy_reset, pdev);
 509         }
 510 }
 511
 512 /*
 513  *              notify hotplug
 514  */
 515 static void usbhsc_notify_hotplug(struct work_struct *work)
 516 {
 517         struct usbhs_priv *priv = container_of(work,
 518                                                struct usbhs_priv,
 519                                                notify_hotplug_work.work);
 520         usbhsc_hotplug(priv);
 521 }
 522
 523 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 524 {
 525         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 526         int delay = usbhs_get_dparam(priv, detection_delay);
 527
 528         /*
 529          * This functions will be called in interrupt.
 530          * To make sure safety context,
 531          * use workqueue for usbhs_notify_hotplug
 532          */
 533         schedule_delayed_work(&priv->notify_hotplug_work,
 534                               msecs_to_jiffies(delay));
 535         return 0;
 536 }
 537
 538 /*
 539  *              platform functions
 540  */
 541 static const struct of_device_id usbhs_of_match[] = {
 542         {
 543                 .compatible = "renesas,usbhs-r8a7790",
 544                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 545         },
 546         {
 547                 .compatible = "renesas,usbhs-r8a7791",
 548                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 549         },
 550         {
 551                 .compatible = "renesas,usbhs-r8a7794",
 552                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 553         },
 554         {
 555                 .compatible = "renesas,usbhs-r8a7795",
 556                 .data = (void *)USBHS_TYPE_RCAR_GEN3,
 557         },
 558         {
 559                 .compatible = "renesas,usbhs-r8a7796",
 560                 .data = (void *)USBHS_TYPE_RCAR_GEN3,
 561         },
 562         {
 563                 .compatible = "renesas,usbhs-r8a77990",
 564                 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL,
 565         },
 566         {
 567                 .compatible = "renesas,usbhs-r8a77995",
 568                 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL,
 569         },
 570         {
 571                 .compatible = "renesas,rcar-gen2-usbhs",
 572                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
 573         },
 574         {
 575                 .compatible = "renesas,rcar-gen3-usbhs",
 576                 .data = (void *)USBHS_TYPE_RCAR_GEN3,
 577         },
 578         {
 579                 .compatible = "renesas,rza1-usbhs",
 580                 .data = (void *)USBHS_TYPE_RZA1,
 581         },
 582         { },
 583 };
 584 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 585
 586 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
 587 {
 588         struct renesas_usbhs_platform_info *info;
 589         struct renesas_usbhs_driver_param *dparam;
 590         u32 tmp;
 591         int gpio;
 592
 593         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
 594         if (!info)
 595                 return NULL;
 596
 597         dparam = &info->driver_param;
 598         dparam->type = (uintptr_t)of_device_get_match_data(dev);
 599         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
 600                 dparam->buswait_bwait = tmp;
 601         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
 602                                        NULL);
 603         if (gpio > 0)
 604                 dparam->enable_gpio = gpio;
 605
 606         if (dparam->type == USBHS_TYPE_RCAR_GEN2 ||
 607             dparam->type == USBHS_TYPE_RCAR_GEN3 ||
 608             dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) {
 609                 dparam->has_usb_dmac = 1;
 610                 dparam->pipe_configs = usbhsc_new_pipe;
 611                 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 612         }
 613
 614         if (dparam->type == USBHS_TYPE_RZA1) {
 615                 dparam->pipe_configs = usbhsc_new_pipe;
 616                 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 617         }
 618
 619         return info;
 620 }
 621
 622 static int usbhs_probe(struct platform_device *pdev)
 623 {
 624         struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev);
 625         struct renesas_usbhs_driver_callback *dfunc;
 626         struct usbhs_priv *priv;
 627         struct resource *res, *irq_res;
 628         int ret;
 629
 630         /* check device node */
 631         if (pdev->dev.of_node)
 632                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
 633
 634         /* check platform information */
 635         if (!info) {
 636                 dev_err(&pdev->dev, "no platform information\n");
 637                 return -EINVAL;
 638         }
 639
 640         /* platform data */
 641         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 642         if (!irq_res) {
 643                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
 644                 return -ENODEV;
 645         }
 646
 647         /* usb private data */
 648         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
 649         if (!priv)
 650                 return -ENOMEM;
 651
 652         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 653         priv->base = devm_ioremap_resource(&pdev->dev, res);
 654         if (IS_ERR(priv->base))
 655                 return PTR_ERR(priv->base);
 656
 657         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
 658                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
 659                 if (IS_ERR(priv->edev))
 660                         return PTR_ERR(priv->edev);
 661         }
 662
 663         priv->rsts = devm_reset_control_array_get_optional_shared(&pdev->dev);
 664         if (IS_ERR(priv->rsts))
 665                 return PTR_ERR(priv->rsts);
 666
 667         /*
 668          * care platform info
 669          */
 670
 671         memcpy(&priv->dparam,
 672                &info->driver_param,
 673                sizeof(struct renesas_usbhs_driver_param));
 674
 675         switch (priv->dparam.type) {
 676         case USBHS_TYPE_RCAR_GEN2:
 677                 priv->pfunc = usbhs_rcar2_ops;
 678                 break;
 679         case USBHS_TYPE_RCAR_GEN3:
 680                 priv->pfunc = usbhs_rcar3_ops;
 681                 break;
 682         case USBHS_TYPE_RCAR_GEN3_WITH_PLL:
 683                 priv->pfunc = usbhs_rcar3_with_pll_ops;
 684                 break;
 685         case USBHS_TYPE_RZA1:
 686                 priv->pfunc = usbhs_rza1_ops;
 687                 break;
 688         default:
 689                 if (!info->platform_callback.get_id) {
 690                         dev_err(&pdev->dev, "no platform callbacks");
 691                         return -EINVAL;
 692                 }
 693                 memcpy(&priv->pfunc,
 694                        &info->platform_callback,
 695                        sizeof(struct renesas_usbhs_platform_callback));
 696                 break;
 697         }
 698
 699         /* set driver callback functions for platform */
 700         dfunc                   = &info->driver_callback;
 701         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
 702
 703         /* set default param if platform doesn't have */
 704         if (!priv->dparam.pipe_configs) {
 705                 priv->dparam.pipe_configs = usbhsc_default_pipe;
 706                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
 707         }
 708         if (!priv->dparam.pio_dma_border)
 709                 priv->dparam.pio_dma_border = 64; /* 64byte */
 710
 711         /* FIXME */
 712         /* runtime power control ? */
 713         if (priv->pfunc.get_vbus)
 714                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
 715
 716         /*
 717          * priv settings
 718          */
 719         priv->irq       = irq_res->start;
 720         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
 721                 priv->irqflags = IRQF_SHARED;
 722         priv->pdev      = pdev;
 723         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 724         spin_lock_init(usbhs_priv_to_lock(priv));
 725
 726         /* call pipe and module init */
 727         ret = usbhs_pipe_probe(priv);
 728         if (ret < 0)
 729                 return ret;
 730
 731         ret = usbhs_fifo_probe(priv);
 732         if (ret < 0)
 733                 goto probe_end_pipe_exit;
 734
 735         ret = usbhs_mod_probe(priv);
 736         if (ret < 0)
 737                 goto probe_end_fifo_exit;
 738
 739         /* dev_set_drvdata should be called after usbhs_mod_init */
 740         platform_set_drvdata(pdev, priv);
 741
 742         ret = reset_control_deassert(priv->rsts);
 743         if (ret)
 744                 goto probe_fail_rst;
 745
 746         ret = usbhsc_clk_get(&pdev->dev, priv);
 747         if (ret)
 748                 goto probe_fail_clks;
 749
 750         /*
 751          * deviece reset here because
 752          * USB device might be used in boot loader.
 753          */
 754         usbhs_sys_clock_ctrl(priv, 0);
 755
 756         /* check GPIO determining if USB function should be enabled */
 757         if (priv->dparam.enable_gpio) {
 758                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
 759                 ret = !gpio_get_value(priv->dparam.enable_gpio);
 760                 gpio_free(priv->dparam.enable_gpio);
 761                 if (ret) {
 762                         dev_warn(&pdev->dev,
 763                                  "USB function not selected (GPIO %d)\n",
 764                                  priv->dparam.enable_gpio);
 765                         ret = -ENOTSUPP;
 766                         goto probe_end_mod_exit;
 767                 }
 768         }
 769
 770         /*
 771          * platform call
 772          *
 773          * USB phy setup might depend on CPU/Board.
 774          * If platform has its callback functions,
 775          * call it here.
 776          */
 777         ret = usbhs_platform_call(priv, hardware_init, pdev);
 778         if (ret < 0) {
 779                 dev_err(&pdev->dev, "platform init failed.\n");
 780                 goto probe_end_mod_exit;
 781         }
 782
 783         /* reset phy for connection */
 784         usbhs_platform_call(priv, phy_reset, pdev);
 785
 786         /* power control */
 787         pm_runtime_enable(&pdev->dev);
 788         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
 789                 usbhsc_power_ctrl(priv, 1);
 790                 usbhs_mod_autonomy_mode(priv);
 791         }
 792
 793         /*
 794          * manual call notify_hotplug for cold plug
 795          */
 796         usbhsc_drvcllbck_notify_hotplug(pdev);
 797
 798         dev_info(&pdev->dev, "probed\n");
 799
 800         return ret;
 801
 802 probe_end_mod_exit:
 803         usbhsc_clk_put(priv);
 804 probe_fail_clks:
 805         reset_control_assert(priv->rsts);
 806 probe_fail_rst:
 807         usbhs_mod_remove(priv);
 808 probe_end_fifo_exit:
 809         usbhs_fifo_remove(priv);
 810 probe_end_pipe_exit:
 811         usbhs_pipe_remove(priv);
 812
 813         dev_info(&pdev->dev, "probe failed (%d)\n", ret);
 814
 815         return ret;
 816 }
 817
 818 static int usbhs_remove(struct platform_device *pdev)
 819 {
 820         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 821         struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev);
 822         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
 823
 824         dev_dbg(&pdev->dev, "usb remove\n");
 825
 826         dfunc->notify_hotplug = NULL;
 827
 828         /* power off */
 829         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 830                 usbhsc_power_ctrl(priv, 0);
 831
 832         pm_runtime_disable(&pdev->dev);
 833
 834         usbhs_platform_call(priv, hardware_exit, pdev);
 835         usbhsc_clk_put(priv);
 836         reset_control_assert(priv->rsts);
 837         usbhs_mod_remove(priv);
 838         usbhs_fifo_remove(priv);
 839         usbhs_pipe_remove(priv);
 840
 841         return 0;
 842 }
 843
 844 static int usbhsc_suspend(struct device *dev)
 845 {
 846         struct usbhs_priv *priv = dev_get_drvdata(dev);
 847         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 848
 849         if (mod) {
 850                 usbhs_mod_call(priv, stop, priv);
 851                 usbhs_mod_change(priv, -1);
 852         }
 853
 854         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
 855                 usbhsc_power_ctrl(priv, 0);
 856
 857         return 0;
 858 }
 859
 860 static int usbhsc_resume(struct device *dev)
 861 {
 862         struct usbhs_priv *priv = dev_get_drvdata(dev);
 863         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 864
 865         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
 866                 usbhsc_power_ctrl(priv, 1);
 867                 usbhs_mod_autonomy_mode(priv);
 868         }
 869
 870         usbhs_platform_call(priv, phy_reset, pdev);
 871
 872         usbhsc_drvcllbck_notify_hotplug(pdev);
 873
 874         return 0;
 875 }
 876
 877 static int usbhsc_runtime_nop(struct device *dev)
 878 {
 879         /* Runtime PM callback shared between ->runtime_suspend()
 880          * and ->runtime_resume(). Simply returns success.
 881          *
 882          * This driver re-initializes all registers after
 883          * pm_runtime_get_sync() anyway so there is no need
 884          * to save and restore registers here.
 885          */
 886         return 0;
 887 }
 888
 889 static const struct dev_pm_ops usbhsc_pm_ops = {
 890         .suspend                = usbhsc_suspend,
 891         .resume                 = usbhsc_resume,
 892         .runtime_suspend        = usbhsc_runtime_nop,
 893         .runtime_resume         = usbhsc_runtime_nop,
 894 };
 895
 896 static struct platform_driver renesas_usbhs_driver = {
 897         .driver         = {
 898                 .name   = "renesas_usbhs",
 899                 .pm     = &usbhsc_pm_ops,
 900                 .of_match_table = of_match_ptr(usbhs_of_match),
 901         },
 902         .probe          = usbhs_probe,
 903         .remove         = usbhs_remove,
 904 };
 905
 906 module_platform_driver(renesas_usbhs_driver);
 907
 908 MODULE_LICENSE("GPL");
 909 MODULE_DESCRIPTION("Renesas USB driver");
 910 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");