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 <[email protected]>
   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_device.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                 return PTR_ERR(priv->clks[1]);
 317
 318         return 0;
 319 }
 320
 321 static void usbhsc_clk_put(struct usbhs_priv *priv)
 322 {
 323         int i;
 324
 325         if (!usbhsc_is_multi_clks(priv))
 326                 return;
 327
 328         for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
 329                 clk_put(priv->clks[i]);
 330 }
 331
 332 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv)
 333 {
 334         int i, ret;
 335
 336         if (!usbhsc_is_multi_clks(priv))
 337                 return 0;
 338
 339         for (i = 0; i < ARRAY_SIZE(priv->clks); i++) {
 340                 ret = clk_prepare_enable(priv->clks[i]);
 341                 if (ret) {
 342                         while (--i >= 0)
 343                                 clk_disable_unprepare(priv->clks[i]);
 344                         return ret;
 345                 }
 346         }
 347
 348         return ret;
 349 }
 350
 351 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv)
 352 {
 353         int i;
 354
 355         if (!usbhsc_is_multi_clks(priv))
 356                 return;
 357
 358         for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
 359                 clk_disable_unprepare(priv->clks[i]);
 360 }
 361
 362 /*
 363  *              platform default param
 364  */
 365
 366 /* commonly used on old SH-Mobile SoCs */
 367 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
 368         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 369         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
 370         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
 371         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
 372         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
 373         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 374         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 375         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 376         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 377         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
 378 };
 379
 380 /* commonly used on newer SH-Mobile and R-Car SoCs */
 381 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
 382         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
 383         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
 384         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
 385         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
 386         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
 387         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
 388         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
 389         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
 390         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
 391         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
 392         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
 393         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
 394         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
 395         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
 396         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
 397         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
 398 };
 399
 400 /*
 401  *              power control
 402  */
 403 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 404 {
 405         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 406         struct device *dev = usbhs_priv_to_dev(priv);
 407
 408         if (enable) {
 409                 /* enable PM */
 410                 pm_runtime_get_sync(dev);
 411
 412                 /* enable clks */
 413                 if (usbhsc_clk_prepare_enable(priv))
 414                         return;
 415
 416                 /* enable platform power */
 417                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 418
 419                 /* USB on */
 420                 usbhs_sys_clock_ctrl(priv, enable);
 421         } else {
 422                 /* USB off */
 423                 usbhs_sys_clock_ctrl(priv, enable);
 424
 425                 /* disable platform power */
 426                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
 427
 428                 /* disable clks */
 429                 usbhsc_clk_disable_unprepare(priv);
 430
 431                 /* disable PM */
 432                 pm_runtime_put_sync(dev);
 433         }
 434 }
 435
 436 /*
 437  *              hotplug
 438  */
 439 static void usbhsc_hotplug(struct usbhs_priv *priv)
 440 {
 441         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 442         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 443         int id;
 444         int enable;
 445         int cable;
 446         int ret;
 447
 448         /*
 449          * get vbus status from platform
 450          */
 451         enable = usbhs_mod_info_call(priv, get_vbus, pdev);
 452
 453         /*
 454          * get id from platform
 455          */
 456         id = usbhs_platform_call(priv, get_id, pdev);
 457
 458         if (enable && !mod) {
 459                 if (priv->edev) {
 460                         cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
 461                         if ((cable > 0 && id != USBHS_HOST) ||
 462                             (!cable && id != USBHS_GADGET)) {
 463                                 dev_info(&pdev->dev,
 464                                          "USB cable plugged in doesn't match the selected role!\n");
 465                                 return;
 466                         }
 467                 }
 468
 469                 ret = usbhs_mod_change(priv, id);
 470                 if (ret < 0)
 471                         return;
 472
 473                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
 474
 475                 /* power on */
 476                 if (usbhs_get_dparam(priv, runtime_pwctrl))
 477                         usbhsc_power_ctrl(priv, enable);
 478
 479                 /* bus init */
 480                 usbhsc_set_buswait(priv);
 481                 usbhsc_bus_init(priv);
 482
 483                 /* module start */
 484                 usbhs_mod_call(priv, start, priv);
 485
 486         } else if (!enable && mod) {
 487                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
 488
 489                 /* module stop */
 490                 usbhs_mod_call(priv, stop, priv);
 491
 492                 /* bus init */
 493                 usbhsc_bus_init(priv);
 494
 495                 /* power off */
 496                 if (usbhs_get_dparam(priv, runtime_pwctrl))
 497                         usbhsc_power_ctrl(priv, enable);
 498
 499                 usbhs_mod_change(priv, -1);
 500
 501                 /* reset phy for next connection */
 502                 usbhs_platform_call(priv, phy_reset, pdev);
 503         }
 504 }
 505
 506 /*
 507  *              notify hotplug
 508  */
 509 static void usbhsc_notify_hotplug(struct work_struct *work)
 510 {
 511         struct usbhs_priv *priv = container_of(work,
 512                                                struct usbhs_priv,
 513                                                notify_hotplug_work.work);
 514         usbhsc_hotplug(priv);
 515 }
 516
 517 int usbhsc_schedule_notify_hotplug(struct platform_device *pdev)
 518 {
 519         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 520         int delay = usbhs_get_dparam(priv, detection_delay);
 521
 522         /*
 523          * This functions will be called in interrupt.
 524          * To make sure safety context,
 525          * use workqueue for usbhs_notify_hotplug
 526          */
 527         schedule_delayed_work(&priv->notify_hotplug_work,
 528                               msecs_to_jiffies(delay));
 529         return 0;
 530 }
 531
 532 /*
 533  *              platform functions
 534  */
 535 static const struct of_device_id usbhs_of_match[] = {
 536         {
 537                 .compatible = "renesas,usbhs-r8a774c0",
 538                 .data = &usbhs_rcar_gen3_with_pll_plat_info,
 539         },
 540         {
 541                 .compatible = "renesas,usbhs-r8a7790",
 542                 .data = &usbhs_rcar_gen2_plat_info,
 543         },
 544         {
 545                 .compatible = "renesas,usbhs-r8a7791",
 546                 .data = &usbhs_rcar_gen2_plat_info,
 547         },
 548         {
 549                 .compatible = "renesas,usbhs-r8a7794",
 550                 .data = &usbhs_rcar_gen2_plat_info,
 551         },
 552         {
 553                 .compatible = "renesas,usbhs-r8a7795",
 554                 .data = &usbhs_rcar_gen3_plat_info,
 555         },
 556         {
 557                 .compatible = "renesas,usbhs-r8a7796",
 558                 .data = &usbhs_rcar_gen3_plat_info,
 559         },
 560         {
 561                 .compatible = "renesas,usbhs-r8a77990",
 562                 .data = &usbhs_rcar_gen3_with_pll_plat_info,
 563         },
 564         {
 565                 .compatible = "renesas,usbhs-r8a77995",
 566                 .data = &usbhs_rcar_gen3_with_pll_plat_info,
 567         },
 568         {
 569                 .compatible = "renesas,rcar-gen2-usbhs",
 570                 .data = &usbhs_rcar_gen2_plat_info,
 571         },
 572         {
 573                 .compatible = "renesas,rcar-gen3-usbhs",
 574                 .data = &usbhs_rcar_gen3_plat_info,
 575         },
 576         {
 577                 .compatible = "renesas,rza1-usbhs",
 578                 .data = &usbhs_rza1_plat_info,
 579         },
 580         {
 581                 .compatible = "renesas,rza2-usbhs",
 582                 .data = &usbhs_rza2_plat_info,
 583         },
 584         { },
 585 };
 586 MODULE_DEVICE_TABLE(of, usbhs_of_match);
 587
 588 static int usbhs_probe(struct platform_device *pdev)
 589 {
 590         const struct renesas_usbhs_platform_info *info;
 591         struct usbhs_priv *priv;
 592         struct device *dev = &pdev->dev;
 593         struct gpio_desc *gpiod;
 594         int ret;
 595         u32 tmp;
 596         int irq;
 597
 598         /* check device node */
 599         if (dev_of_node(dev))
 600                 info = of_device_get_match_data(dev);
 601         else
 602                 info = renesas_usbhs_get_info(pdev);
 603
 604         /* check platform information */
 605         if (!info) {
 606                 dev_err(dev, "no platform information\n");
 607                 return -EINVAL;
 608         }
 609
 610         /* platform data */
 611         irq = platform_get_irq(pdev, 0);
 612         if (irq < 0)
 613                 return irq;
 614
 615         /* usb private data */
 616         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 617         if (!priv)
 618                 return -ENOMEM;
 619
 620         priv->base = devm_platform_ioremap_resource(pdev, 0);
 621         if (IS_ERR(priv->base))
 622                 return PTR_ERR(priv->base);
 623
 624         if (of_property_read_bool(dev_of_node(dev), "extcon")) {
 625                 priv->edev = extcon_get_edev_by_phandle(dev, 0);
 626                 if (IS_ERR(priv->edev))
 627                         return PTR_ERR(priv->edev);
 628         }
 629
 630         priv->rsts = devm_reset_control_array_get_optional_shared(dev);
 631         if (IS_ERR(priv->rsts))
 632                 return PTR_ERR(priv->rsts);
 633
 634         /*
 635          * care platform info
 636          */
 637
 638         priv->dparam = info->driver_param;
 639
 640         if (!info->platform_callback.get_id) {
 641                 dev_err(dev, "no platform callbacks\n");
 642                 return -EINVAL;
 643         }
 644         priv->pfunc = &info->platform_callback;
 645
 646         /* set default param if platform doesn't have */
 647         if (usbhs_get_dparam(priv, has_new_pipe_configs)) {
 648                 priv->dparam.pipe_configs = usbhsc_new_pipe;
 649                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
 650         } else if (!priv->dparam.pipe_configs) {
 651                 priv->dparam.pipe_configs = usbhsc_default_pipe;
 652                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
 653         }
 654         if (!priv->dparam.pio_dma_border)
 655                 priv->dparam.pio_dma_border = 64; /* 64byte */
 656         if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp))
 657                 priv->dparam.buswait_bwait = tmp;
 658         gpiod = devm_gpiod_get_optional(dev, "renesas,enable", GPIOD_IN);
 659         if (IS_ERR(gpiod))
 660                 return PTR_ERR(gpiod);
 661
 662         /* FIXME */
 663         /* runtime power control ? */
 664         if (priv->pfunc->get_vbus)
 665                 usbhs_get_dparam(priv, runtime_pwctrl) = 1;
 666
 667         /*
 668          * priv settings
 669          */
 670         priv->irq = irq;
 671         priv->pdev      = pdev;
 672         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
 673         spin_lock_init(usbhs_priv_to_lock(priv));
 674
 675         /* call pipe and module init */
 676         ret = usbhs_pipe_probe(priv);
 677         if (ret < 0)
 678                 return ret;
 679
 680         ret = usbhs_fifo_probe(priv);
 681         if (ret < 0)
 682                 goto probe_end_pipe_exit;
 683
 684         ret = usbhs_mod_probe(priv);
 685         if (ret < 0)
 686                 goto probe_end_fifo_exit;
 687
 688         /* dev_set_drvdata should be called after usbhs_mod_init */
 689         platform_set_drvdata(pdev, priv);
 690
 691         ret = reset_control_deassert(priv->rsts);
 692         if (ret)
 693                 goto probe_fail_rst;
 694
 695         ret = usbhsc_clk_get(dev, priv);
 696         if (ret)
 697                 goto probe_fail_clks;
 698
 699         /*
 700          * deviece reset here because
 701          * USB device might be used in boot loader.
 702          */
 703         usbhs_sys_clock_ctrl(priv, 0);
 704
 705         /* check GPIO determining if USB function should be enabled */
 706         if (gpiod) {
 707                 ret = !gpiod_get_value(gpiod);
 708                 if (ret) {
 709                         dev_warn(dev, "USB function not selected (GPIO)\n");
 710                         ret = -ENOTSUPP;
 711                         goto probe_end_mod_exit;
 712                 }
 713         }
 714
 715         /*
 716          * platform call
 717          *
 718          * USB phy setup might depend on CPU/Board.
 719          * If platform has its callback functions,
 720          * call it here.
 721          */
 722         ret = usbhs_platform_call(priv, hardware_init, pdev);
 723         if (ret < 0) {
 724                 dev_err(dev, "platform init failed.\n");
 725                 goto probe_end_mod_exit;
 726         }
 727
 728         /* reset phy for connection */
 729         usbhs_platform_call(priv, phy_reset, pdev);
 730
 731         /* power control */
 732         pm_runtime_enable(dev);
 733         if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
 734                 usbhsc_power_ctrl(priv, 1);
 735                 usbhs_mod_autonomy_mode(priv);
 736         } else {
 737                 usbhs_mod_non_autonomy_mode(priv);
 738         }
 739
 740         /*
 741          * manual call notify_hotplug for cold plug
 742          */
 743         usbhsc_schedule_notify_hotplug(pdev);
 744
 745         dev_info(dev, "probed\n");
 746
 747         return ret;
 748
 749 probe_end_mod_exit:
 750         usbhsc_clk_put(priv);
 751 probe_fail_clks:
 752         reset_control_assert(priv->rsts);
 753 probe_fail_rst:
 754         usbhs_mod_remove(priv);
 755 probe_end_fifo_exit:
 756         usbhs_fifo_remove(priv);
 757 probe_end_pipe_exit:
 758         usbhs_pipe_remove(priv);
 759
 760         dev_info(dev, "probe failed (%d)\n", ret);
 761
 762         return ret;
 763 }
 764
 765 static int usbhs_remove(struct platform_device *pdev)
 766 {
 767         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
 768
 769         dev_dbg(&pdev->dev, "usb remove\n");
 770
 771         /* power off */
 772         if (!usbhs_get_dparam(priv, runtime_pwctrl))
 773                 usbhsc_power_ctrl(priv, 0);
 774
 775         pm_runtime_disable(&pdev->dev);
 776
 777         usbhs_platform_call(priv, hardware_exit, pdev);
 778         usbhsc_clk_put(priv);
 779         reset_control_assert(priv->rsts);
 780         usbhs_mod_remove(priv);
 781         usbhs_fifo_remove(priv);
 782         usbhs_pipe_remove(priv);
 783
 784         return 0;
 785 }
 786
 787 static __maybe_unused int usbhsc_suspend(struct device *dev)
 788 {
 789         struct usbhs_priv *priv = dev_get_drvdata(dev);
 790         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
 791
 792         if (mod) {
 793                 usbhs_mod_call(priv, stop, priv);
 794                 usbhs_mod_change(priv, -1);
 795         }
 796
 797         if (mod || !usbhs_get_dparam(priv, runtime_pwctrl))
 798                 usbhsc_power_ctrl(priv, 0);
 799
 800         return 0;
 801 }
 802
 803 static __maybe_unused int usbhsc_resume(struct device *dev)
 804 {
 805         struct usbhs_priv *priv = dev_get_drvdata(dev);
 806         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 807
 808         if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
 809                 usbhsc_power_ctrl(priv, 1);
 810                 usbhs_mod_autonomy_mode(priv);
 811         }
 812
 813         usbhs_platform_call(priv, phy_reset, pdev);
 814
 815         usbhsc_schedule_notify_hotplug(pdev);
 816
 817         return 0;
 818 }
 819
 820 static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume);
 821
 822 static struct platform_driver renesas_usbhs_driver = {
 823         .driver         = {
 824                 .name   = "renesas_usbhs",
 825                 .pm     = &usbhsc_pm_ops,
 826                 .of_match_table = usbhs_of_match,
 827         },
 828         .probe          = usbhs_probe,
 829         .remove         = usbhs_remove,
 830 };
 831
 832 module_platform_driver(renesas_usbhs_driver);
 833
 834 MODULE_LICENSE("GPL");
 835 MODULE_DESCRIPTION("Renesas USB driver");
 836 MODULE_AUTHOR("Kuninori Morimoto <[email protected]>");