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  * Copyright (C) 2019 Renesas Electronics Corporation
   7  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   8  */
   9 #include <linux/clk.h>
  10 #include <linux/err.h>
  11 #include <linux/gpio/consumer.h>
  12 #include <linux/io.h>
  13 #include <linux/module.h>
  14 #include <linux/of.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  * platform call back
  48  *
  49  * renesas usb support platform callback function.
  50  * Below macro call it.
  51  * if platform doesn't have callback, it return 0 (no error)
  52  */
  53 #define usbhs_platform_call(priv, func, args...)\
  54         (!(priv) ? -ENODEV :                    \
  55          !((priv)->pfunc->func) ? 0 :           \
  56          (priv)->pfunc->func(args))
  57
  58 /*
  59  *              common functions
  60  */
  61 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
  62 {
  63         return ioread16(priv->base + reg);
  64 }
  65
  66 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
  67 {
  68         iowrite16(data, priv->base + reg);
  69 }
  70
  71 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
  72 {
  73         u16 val = usbhs_read(priv, reg);
  74
  75         val &= ~mask;
  76         val |= data & mask;
  77
  78         usbhs_write(priv, reg, val);
  79 }
  80
  81 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
  82 {
  83         return dev_get_drvdata(&pdev->dev);
  84 }
  85
  86 int usbhs_get_id_as_gadget(struct platform_device *pdev)
  87 {
  88         return USBHS_GADGET;
  89 }
  90
  91 /*
  92  *              syscfg functions
  93  */
  94 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
  95 {
  96         usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
  97 }
  98
  99 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 100 {
 101         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 102         u16 val  = DCFM | DRPD | HSE | USBE;
 103
 104         /*
 105          * if enable
 106          *
 107          * - select Host mode
 108          * - D+ Line/D- Line Pull-down
 109          */
 110         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 111 }
 112
 113 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
 114 {
 115         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
 116         u16 val  = HSE | USBE;
 117
 118         /* CNEN bit is required for function operation */
 119         if (usbhs_get_dparam(priv, has_cnen)) {
 120                 mask |= CNEN;
 121                 val  |= CNEN;
 122         }
 123
 124         /*
 125          * if enable
 126          *
 127          * - select Function mode
 128          * - D+ Line Pull-up is disabled
 129          *      When D+ Line Pull-up is enabled,
 130          *      calling usbhs_sys_function_pullup(,1)
 131          */
 132         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 133 }
 134
 135 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
 136 {
 137         usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
 138 }
 139
 140 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
 141 {
 142         usbhs_write(priv, TESTMODE, mode);
 143 }
 144
 145 /*
 146  *              frame functions
 147  */
 148 int usbhs_frame_get_num(struct usbhs_priv *priv)
 149 {
 150         return usbhs_read(priv, FRMNUM) & FRNM_MASK;
 151 }
 152
 153 /*
 154  *              usb request functions
 155  */
 156 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 157 {
 158         u16 val;
 159
 160         val = usbhs_read(priv, USBREQ);
 161         req->bRequest           = (val >> 8) & 0xFF;
 162         req->bRequestType       = (val >> 0) & 0xFF;
 163
 164         req->wValue     = cpu_to_le16(usbhs_read(priv, USBVAL));
 165         req->wIndex     = cpu_to_le16(usbhs_read(priv, USBINDX));
 166         req->wLength    = cpu_to_le16(usbhs_read(priv, USBLENG));
 167 }
 168
 169 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
 170 {
 171         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
 172         usbhs_write(priv, USBVAL,  le16_to_cpu(req->wValue));
 173         usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex));
 174         usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength));
 175
 176         usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
 177 }
 178
 179 /*
 180  *              bus/vbus functions
 181  */
 182 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
 183 {
 184         u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
 185
 186         if (status != USBRST) {
 187                 struct device *dev = usbhs_priv_to_dev(priv);
 188                 dev_err(dev, "usbhs should be reset\n");
 189         }
 190
 191         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
 192 }
 193
 194 void usbhs_bus_send_reset(struct usbhs_priv *priv)
 195 {
 196         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
 197 }
 198
 199 int usbhs_bus_get_speed(struct usbhs_priv *priv)
 200 {
 201         u16 dvstctr = usbhs_read(priv, DVSTCTR);
 202
 203         switch (RHST & dvstctr) {
 204         case RHST_LOW_SPEED:
 205                 return USB_SPEED_LOW;
 206         case RHST_FULL_SPEED:
 207                 return USB_SPEED_FULL;
 208         case RHST_HIGH_SPEED:
 209                 return USB_SPEED_HIGH;
 210         }
 211
 212         return USB_SPEED_UNKNOWN;
 213 }
 214
 215 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
 216 {
 217         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 218
 219         return usbhs_platform_call(priv, set_vbus, pdev, enable);
 220 }
 221
 222 static void usbhsc_bus_init(struct usbhs_priv *priv)
 223 {
 224         usbhs_write(priv, DVSTCTR, 0);
 225
 226         usbhs_vbus_ctrl(priv, 0);
 227 }
 228
 229 /*
 230  *              device configuration
 231  */
 232 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
 233                            u16 upphub, u16 hubport, u16 speed)
 234 {
 235         struct device *dev = usbhs_priv_to_dev(priv);
 236         u16 usbspd = 0;
 237         u32 reg = DEVADD0 + (2 * devnum);
 238
 239         if (devnum > 10) {
 240                 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
 241                 return -EIO;
 242         }
 243
 244         if (upphub > 0xA) {
 245                 dev_err(dev, "unsupported hub number %d\n", upphub);
 246                 return -EIO;
 247         }
 248
 249         switch (speed) {
 250         case USB_SPEED_LOW:
 251                 usbspd = USBSPD_SPEED_LOW;
 252                 break;
 253         case USB_SPEED_FULL:
 254                 usbspd = USBSPD_SPEED_FULL;
 255                 break;
 256         case USB_SPEED_HIGH:
 257                 usbspd = USBSPD_SPEED_HIGH;
 258                 break;
 259         default:
 260                 dev_err(dev, "unsupported speed %d\n", speed);
 261                 return -EIO;
 262         }
 263
 264         usbhs_write(priv, reg,  UPPHUB(upphub)  |
 265                                 HUBPORT(hubport)|
 266                                 USBSPD(usbspd));
 267
 268         return 0;
 269 }
 270
 271 /*
 272  *              interrupt functions
 273  */
 274 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
 275 {
 276         u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
 277
 278         usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
 279 }
 280
 281 /*
 282  *              local functions
 283  */
 284 static void usbhsc_set_buswait(struct usbhs_priv *priv)
 285 {
 286         int wait = usbhs_get_dparam(priv, buswait_bwait);
 287
 288         /* set bus wait if platform have */
 289         if (wait)
 290                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
 291 }
 292
 293 static bool usbhsc_is_multi_clks(struct usbhs_priv *priv)
 294 {
 295         return priv->dparam.multi_clks;
 296 }
 297
 298 static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv)
 299 {
 300         if (!usbhsc_is_multi_clks(priv))
 301                 return 0;
 302
 303         /* The first clock should exist */
 304         priv->clks[0] = of_clk_get(dev_of_node(dev), 0);
 305         if (IS_ERR(priv->clks[0]))
 306                 return PTR_ERR(priv->clks[0]);
 307
 308         /*
 309          * To backward compatibility with old DT, this driver checks the return
 310          * value if it's -ENOENT or not.
 311          */
 312         priv->clks[1] = of_clk_get(dev_of_node(dev), 1);
 313         if (PTR_ERR(priv->clks[1]) == -ENOENT)
 314                 priv->clks[1] = NULL;
 315         else if (IS_ERR(priv->clks[1])) {
 316                 clk_put(priv->clks[0]);
 317                 return PTR_ERR(priv->clks[1]);
 318         }
 319
 320         return 0;
 321 }
 322
 323 static void usbhsc_clk_put(struct usbhs_priv *priv)
 324 {
 325         int i;
 326
 327         if (!usbhsc_is_multi_clks(priv))
 328                 return;
 329
 330         for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
 331                 clk_put(priv->clks[i]);
 332 }
 333
 334 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv)
 335 {
 336         int i, ret;
 337
 338         if (!usbhsc_is_multi_clks(priv))
 339                 return 0;
 340
 341         for (i = 0; i < ARRAY_SIZE(priv->clks); i++) {
 342                 ret = clk_prepare_enable(priv->clks[i]);
 343                 if (ret) {
 344                         while (--i >= 0)
 345                                 clk_disable_unprepare(priv->clks[i]);
 346                         return ret;
 347                 }
 348         }
 349
 350         return ret;
 351 }
 352
 353 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv)
 354 {
 355         int i;
 356
 357         if (!usbhsc_is_multi_clks(priv))
 358                 return;
 359
 360         for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
 361                 clk_disable_unprepare(priv->clks[i]);
 362 }
 363
 364 /*
 365  *              platform default param
 366  */
 367
 368 /* commonly used on old SH-Mobile and RZ/G2L family SoCs */
 369 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
 370         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 371         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
 372         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
 373         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 374         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
 375         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
 376         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 377         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 378         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 379         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
 380 };
 381
 382 /* commonly used on newer SH-Mobile and R-Car SoCs */
 383 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
 384         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 385         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
 386         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
 387         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 388         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
 389         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
 390         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 391         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 392         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 393         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
 394         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
 395         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
 396         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
 397         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
 398         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
 399         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
 400 };
 401
 402 /*
 403  *              power control
 404  */
 405 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 406 {
 407         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 408         struct device *dev = usbhs_priv_to_dev(priv);
 409
 410         if (enable) {
 411                 /* enable PM */
 412                 pm_runtime_get_sync(dev);
 413
 414                 /* enable clks */
 415                 if (usbhsc_clk_prepare_enable(priv))
 416                         return;
 417
 418                 /* enable platform power */
 419                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 420
 421                 /* USB on */
 422                 usbhs_sys_clock_ctrl(priv, enable);
 423         } else {
 424                 /* USB off */
 425                 usbhs_sys_clock_ctrl(priv, enable);
 426
 427                 /* disable platform power */
 428                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 429
 430                 /* disable clks */
 431                 usbhsc_clk_disable_unprepare(priv);
 432
 433                 /* disable PM */
 434                 pm_runtime_put_sync(dev);
 435         }
 436 }
 437
 438 /*
 439  *              hotplug
 440  */
 441 static void usbhsc_hotplug(struct usbhs_priv *priv)
 442 {
 443         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 444         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 445         int id;
 446         int enable;
 447         int cable;
 448         int ret;
 449
 450         /*
 451          * get vbus status from platform
 452          */
 453         enable = usbhs_mod_info_call(priv, get_vbus, pdev);
 454
 455         /*
 456          * get id from platform
 457          */
 458         id = usbhs_platform_call(priv, get_id, pdev);
 459
 460         if (enable && !mod) {
 461                 if (priv->edev) {
 462                         cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
 463                         if ((cable > 0 && id != USBHS_HOST) ||
 464                             (!cable && id != USBHS_GADGET)) {
 465                                 dev_info(&pdev->dev,
 466                                          "USB cable plugged in doesn't match the selected role!\n");
 467                                 return;
 468                         }
 469                 }
 470
 471                 ret = usbhs_mod_change(priv, id);
 472                 if (ret < 0)
 473                         return;
 474
 475                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
 476
 477                 /* power on */
 478                 if (usbhs_get_dparam(priv, runtime_pwctrl))
 479                         usbhsc_power_ctrl(priv, enable);
 480
 481                 /* bus init */
 482                 usbhsc_set_buswait(priv);
 483                 usbhsc_bus_init(priv);
 484
 485                 /* module start */
 486                 usbhs_mod_call(priv, start, priv);
 487
 488         } else if (!enable && mod) {
 489                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
 490
 491                 /* module stop */
 492                 usbhs_mod_call(priv, stop, priv);
 493
 494                 /* bus init */
 495                 usbhsc_bus_init(priv);
 496
 497                 /* power off */
 498                 if (usbhs_get_dparam(priv, runtime_pwctrl))
 499                         usbhsc_power_ctrl(priv, enable);
 500
 501                 usbhs_mod_change(priv, -1);
 502
 503                 /* reset phy for next connection */
 504                 usbhs_platform_call(priv, phy_reset, pdev);
 505         }
 506 }
 507
 508 /*
 509  *              notify hotplug
 510  */
 511 static void usbhsc_notify_hotplug(struct work_struct *work)
 512 {
 513         struct usbhs_priv *priv = container_of(work,
 514                                                struct usbhs_priv,
 515                                                notify_hotplug_work.work);
 516         usbhsc_hotplug(priv);
 517 }
 518
 519 int usbhsc_schedule_notify_hotplug(struct platform_device *pdev)
 520 {
 521         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 522         int delay = usbhs_get_dparam(priv, detection_delay);
 523
 524         /*
 525          * This functions will be called in interrupt.
 526          * To make sure safety context,
 527          * use workqueue for usbhs_notify_hotplug
 528          */
 529         schedule_delayed_work(&priv->notify_hotplug_work,
 530                               msecs_to_jiffies(delay));
 531         return 0;
 532 }
 533
 534 /*
 535  *              platform functions
 536  */
 537 static const struct of_device_id usbhs_of_match[] = {
 538         {
 539                 .compatible = "renesas,usbhs-r8a774c0",
 540                 .data = &usbhs_rcar_gen3_with_pll_plat_info,
 541         },
 542         {
 543                 .compatible = "renesas,usbhs-r8a7790",
 544                 .data = &usbhs_rcar_gen2_plat_info,
 545         },
 546         {
 547                 .compatible = "renesas,usbhs-r8a7791",
 548                 .data = &usbhs_rcar_gen2_plat_info,
 549         },
 550         {
 551                 .compatible = "renesas,usbhs-r8a7794",
 552                 .data = &usbhs_rcar_gen2_plat_info,
 553         },
 554         {
 555                 .compatible = "renesas,usbhs-r8a7795",
 556                 .data = &usbhs_rcar_gen3_plat_info,
 557         },
 558         {
 559                 .compatible = "renesas,usbhs-r8a7796",
 560                 .data = &usbhs_rcar_gen3_plat_info,
 561         },
 562         {
 563                 .compatible = "renesas,usbhs-r8a77990",
 564                 .data = &usbhs_rcar_gen3_with_pll_plat_info,
 565         },
 566         {
 567                 .compatible = "renesas,usbhs-r8a77995",
 568                 .data = &usbhs_rcar_gen3_with_pll_plat_info,
 569         },
 570         {
 571                 .compatible = "renesas,usbhs-r9a07g043",
 572                 .data = &usbhs_rzg2l_plat_info,
 573         },
 574         {
 575                 .compatible = "renesas,usbhs-r9a07g044",
 576                 .data = &usbhs_rzg2l_plat_info,
 577         },
 578         {
 579                 .compatible = "renesas,usbhs-r9a07g054",
 580                 .data = &usbhs_rzg2l_plat_info,
 581         },
 582         {
 583                 .compatible = "renesas,rcar-gen2-usbhs",
 584                 .data = &usbhs_rcar_gen2_plat_info,
 585         },
 586         {
 587                 .compatible = "renesas,rcar-gen3-usbhs",
 588                 .data = &usbhs_rcar_gen3_plat_info,
 589         },
 590         {
 591                 .compatible = "renesas,rza1-usbhs",
 592                 .data = &usbhs_rza1_plat_info,
 593         },
 594         {
 595                 .compatible = "renesas,rza2-usbhs",
 596                 .data = &usbhs_rza2_plat_info,
 597         },
 598         {
 599                 .compatible = "renesas,rzg2l-usbhs",
 600                 .data = &usbhs_rzg2l_plat_info,
 601         },
 602         { }
 603 };
 604 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 605
 606 static int usbhs_probe(struct platform_device *pdev)
 607 {
 608         const struct renesas_usbhs_platform_info *info;
 609         struct usbhs_priv *priv;
 610         struct device *dev = &pdev->dev;
 611         struct gpio_desc *gpiod;
 612         int ret;
 613         u32 tmp;
 614         int irq;
 615
 616         info = of_device_get_match_data(dev);
 617         if (!info) {
 618                 info = dev_get_platdata(dev);
 619                 if (!info)
 620                         return dev_err_probe(dev, -EINVAL, "no platform info\n");
 621         }
 622
 623         /* platform data */
 624         irq = platform_get_irq(pdev, 0);
 625         if (irq < 0)
 626                 return irq;
 627
 628         /* usb private data */
 629         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 630         if (!priv)
 631                 return -ENOMEM;
 632
 633         priv->base = devm_platform_ioremap_resource(pdev, 0);
 634         if (IS_ERR(priv->base))
 635                 return PTR_ERR(priv->base);
 636
 637         if (of_property_present(dev_of_node(dev), "extcon")) {
 638                 priv->edev = extcon_get_edev_by_phandle(dev, 0);
 639                 if (IS_ERR(priv->edev))
 640                         return PTR_ERR(priv->edev);
 641         }
 642
 643         priv->rsts = devm_reset_control_array_get_optional_shared(dev);
 644         if (IS_ERR(priv->rsts))
 645                 return PTR_ERR(priv->rsts);
 646
 647         /*
 648          * care platform info
 649          */
 650
 651         priv->dparam = info->driver_param;
 652
 653         if (!info->platform_callback.get_id) {
 654                 dev_err(dev, "no platform callbacks\n");
 655                 return -EINVAL;
 656         }
 657         priv->pfunc = &info->platform_callback;
 658
 659         /* set default param if platform doesn't have */
 660         if (usbhs_get_dparam(priv, has_new_pipe_configs)) {
 661                 priv->dparam.pipe_configs = usbhsc_new_pipe;
 662                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 663         } else if (!priv->dparam.pipe_configs) {
 664                 priv->dparam.pipe_configs = usbhsc_default_pipe;
 665                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
 666         }
 667         if (!priv->dparam.pio_dma_border)
 668                 priv->dparam.pio_dma_border = 64; /* 64byte */
 669         if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp))
 670                 priv->dparam.buswait_bwait = tmp;
 671         gpiod = devm_gpiod_get_optional(dev, "renesas,enable", GPIOD_IN);
 672         if (IS_ERR(gpiod))
 673                 return PTR_ERR(gpiod);
 674
 675         /* FIXME */
 676         /* runtime power control ? */
 677         if (priv->pfunc->get_vbus)
 678                 usbhs_get_dparam(priv, runtime_pwctrl) = 1;
 679
 680         /*
 681          * priv settings
 682          */
 683         priv->irq = irq;
 684         priv->pdev      = pdev;
 685         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 686         spin_lock_init(usbhs_priv_to_lock(priv));
 687
 688         /*
 689          * Acquire clocks and enable power management (PM) early in the
 690          * probe process, as the driver accesses registers during
 691          * initialization. Ensure the device is active before proceeding.
 692          */
 693         pm_runtime_enable(dev);
 694
 695         ret = usbhsc_clk_get(dev, priv);
 696         if (ret)
 697                 goto probe_pm_disable;
 698
 699         ret = pm_runtime_resume_and_get(dev);
 700         if (ret)
 701                 goto probe_clk_put;
 702
 703         ret = usbhsc_clk_prepare_enable(priv);
 704         if (ret)
 705                 goto probe_pm_put;
 706
 707         /* call pipe and module init */
 708         ret = usbhs_pipe_probe(priv);
 709         if (ret < 0)
 710                 goto probe_clk_dis_unprepare;
 711
 712         ret = usbhs_fifo_probe(priv);
 713         if (ret < 0)
 714                 goto probe_end_pipe_exit;
 715
 716         ret = usbhs_mod_probe(priv);
 717         if (ret < 0)
 718                 goto probe_end_fifo_exit;
 719
 720         /* platform_set_drvdata() should be called after usbhs_mod_probe() */
 721         platform_set_drvdata(pdev, priv);
 722
 723         ret = reset_control_deassert(priv->rsts);
 724         if (ret)
 725                 goto probe_fail_rst;
 726
 727         /*
 728          * device reset here because
 729          * USB device might be used in boot loader.
 730          */
 731         usbhs_sys_clock_ctrl(priv, 0);
 732
 733         /* check GPIO determining if USB function should be enabled */
 734         if (gpiod) {
 735                 ret = !gpiod_get_value(gpiod);
 736                 if (ret) {
 737                         dev_warn(dev, "USB function not selected (GPIO)\n");
 738                         ret = -ENOTSUPP;
 739                         goto probe_assert_rest;
 740                 }
 741         }
 742
 743         /*
 744          * platform call
 745          *
 746          * USB phy setup might depend on CPU/Board.
 747          * If platform has its callback functions,
 748          * call it here.
 749          */
 750         ret = usbhs_platform_call(priv, hardware_init, pdev);
 751         if (ret < 0) {
 752                 dev_err(dev, "platform init failed.\n");
 753                 goto probe_assert_rest;
 754         }
 755
 756         /* reset phy for connection */
 757         usbhs_platform_call(priv, phy_reset, pdev);
 758
 759         /*
 760          * Disable the clocks that were enabled earlier in the probe path,
 761          * and let the driver handle the clocks beyond this point.
 762          */
 763         usbhsc_clk_disable_unprepare(priv);
 764         pm_runtime_put(dev);
 765
 766         if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
 767                 usbhsc_power_ctrl(priv, 1);
 768                 usbhs_mod_autonomy_mode(priv);
 769         } else {
 770                 usbhs_mod_non_autonomy_mode(priv);
 771         }
 772
 773         /*
 774          * manual call notify_hotplug for cold plug
 775          */
 776         usbhsc_schedule_notify_hotplug(pdev);
 777
 778         dev_info(dev, "probed\n");
 779
 780         return ret;
 781
 782 probe_assert_rest:
 783         reset_control_assert(priv->rsts);
 784 probe_fail_rst:
 785         usbhs_mod_remove(priv);
 786 probe_end_fifo_exit:
 787         usbhs_fifo_remove(priv);
 788 probe_end_pipe_exit:
 789         usbhs_pipe_remove(priv);
 790 probe_clk_dis_unprepare:
 791         usbhsc_clk_disable_unprepare(priv);
 792 probe_pm_put:
 793         pm_runtime_put(dev);
 794 probe_clk_put:
 795         usbhsc_clk_put(priv);
 796 probe_pm_disable:
 797         pm_runtime_disable(dev);
 798
 799         dev_info(dev, "probe failed (%d)\n", ret);
 800
 801         return ret;
 802 }
 803
 804 static void usbhs_remove(struct platform_device *pdev)
 805 {
 806         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 807
 808         dev_dbg(&pdev->dev, "usb remove\n");
 809
 810         flush_delayed_work(&priv->notify_hotplug_work);
 811
 812         /* power off */
 813         if (!usbhs_get_dparam(priv, runtime_pwctrl))
 814                 usbhsc_power_ctrl(priv, 0);
 815
 816         pm_runtime_disable(&pdev->dev);
 817
 818         usbhs_platform_call(priv, hardware_exit, pdev);
 819         usbhsc_clk_put(priv);
 820         reset_control_assert(priv->rsts);
 821         usbhs_mod_remove(priv);
 822         usbhs_fifo_remove(priv);
 823         usbhs_pipe_remove(priv);
 824 }
 825
 826 static __maybe_unused int usbhsc_suspend(struct device *dev)
 827 {
 828         struct usbhs_priv *priv = dev_get_drvdata(dev);
 829         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 830
 831         if (mod) {
 832                 usbhs_mod_call(priv, stop, priv);
 833                 usbhs_mod_change(priv, -1);
 834         }
 835
 836         if (mod || !usbhs_get_dparam(priv, runtime_pwctrl))
 837                 usbhsc_power_ctrl(priv, 0);
 838
 839         return 0;
 840 }
 841
 842 static __maybe_unused int usbhsc_resume(struct device *dev)
 843 {
 844         struct usbhs_priv *priv = dev_get_drvdata(dev);
 845         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 846
 847         if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
 848                 usbhsc_power_ctrl(priv, 1);
 849                 usbhs_mod_autonomy_mode(priv);
 850         }
 851
 852         usbhs_platform_call(priv, phy_reset, pdev);
 853
 854         usbhsc_schedule_notify_hotplug(pdev);
 855
 856         return 0;
 857 }
 858
 859 static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume);
 860
 861 static struct platform_driver renesas_usbhs_driver = {
 862         .driver         = {
 863                 .name   = "renesas_usbhs",
 864                 .pm     = &usbhsc_pm_ops,
 865                 .of_match_table = usbhs_of_match,
 866         },
 867         .probe          = usbhs_probe,
 868         .remove         = usbhs_remove,
 869 };
 870
 871 module_platform_driver(renesas_usbhs_driver);
 872
 873 MODULE_LICENSE("GPL");
 874 MODULE_DESCRIPTION("Renesas USB driver");
 875 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");