drivers/phy/phy-exynos5-usbdrd.c

   1 /*
   2  * Samsung EXYNOS5 SoC series USB DRD PHY driver
   3  *
   4  * Phy provider for USB 3.0 DRD controller on Exynos5 SoC series
   5  *
   6  * Copyright (C) 2014 Samsung Electronics Co., Ltd.
   7  * Author: Vivek Gautam <gautam.vivek@samsung.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/delay.h>
  16 #include <linux/io.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/of_address.h>
  21 #include <linux/phy/phy.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/mutex.h>
  24 #include <linux/mfd/syscon.h>
  25 #include <linux/mfd/syscon/exynos5-pmu.h>
  26 #include <linux/regmap.h>
  27 #include <linux/regulator/consumer.h>
  28
  29 /* Exynos USB PHY registers */
  30 #define EXYNOS5_FSEL_9MHZ6              0x0
  31 #define EXYNOS5_FSEL_10MHZ              0x1
  32 #define EXYNOS5_FSEL_12MHZ              0x2
  33 #define EXYNOS5_FSEL_19MHZ2             0x3
  34 #define EXYNOS5_FSEL_20MHZ              0x4
  35 #define EXYNOS5_FSEL_24MHZ              0x5
  36 #define EXYNOS5_FSEL_50MHZ              0x7
  37
  38 /* EXYNOS5: USB 3.0 DRD PHY registers */
  39 #define EXYNOS5_DRD_LINKSYSTEM                  0x04
  40
  41 #define LINKSYSTEM_FLADJ_MASK                   (0x3f << 1)
  42 #define LINKSYSTEM_FLADJ(_x)                    ((_x) << 1)
  43 #define LINKSYSTEM_XHCI_VERSION_CONTROL         BIT(27)
  44
  45 #define EXYNOS5_DRD_PHYUTMI                     0x08
  46
  47 #define PHYUTMI_OTGDISABLE                      BIT(6)
  48 #define PHYUTMI_FORCESUSPEND                    BIT(1)
  49 #define PHYUTMI_FORCESLEEP                      BIT(0)
  50
  51 #define EXYNOS5_DRD_PHYPIPE                     0x0c
  52
  53 #define EXYNOS5_DRD_PHYCLKRST                   0x10
  54
  55 #define PHYCLKRST_EN_UTMISUSPEND                BIT(31)
  56
  57 #define PHYCLKRST_SSC_REFCLKSEL_MASK            (0xff << 23)
  58 #define PHYCLKRST_SSC_REFCLKSEL(_x)             ((_x) << 23)
  59
  60 #define PHYCLKRST_SSC_RANGE_MASK                (0x03 << 21)
  61 #define PHYCLKRST_SSC_RANGE(_x)                 ((_x) << 21)
  62
  63 #define PHYCLKRST_SSC_EN                        BIT(20)
  64 #define PHYCLKRST_REF_SSP_EN                    BIT(19)
  65 #define PHYCLKRST_REF_CLKDIV2                   BIT(18)
  66
  67 #define PHYCLKRST_MPLL_MULTIPLIER_MASK          (0x7f << 11)
  68 #define PHYCLKRST_MPLL_MULTIPLIER_100MHZ_REF    (0x19 << 11)
  69 #define PHYCLKRST_MPLL_MULTIPLIER_50M_REF       (0x32 << 11)
  70 #define PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF     (0x68 << 11)
  71 #define PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF     (0x7d << 11)
  72 #define PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF  (0x02 << 11)
  73
  74 #define PHYCLKRST_FSEL_UTMI_MASK                (0x7 << 5)
  75 #define PHYCLKRST_FSEL_PIPE_MASK                (0x7 << 8)
  76 #define PHYCLKRST_FSEL(_x)                      ((_x) << 5)
  77 #define PHYCLKRST_FSEL_PAD_100MHZ               (0x27 << 5)
  78 #define PHYCLKRST_FSEL_PAD_24MHZ                (0x2a << 5)
  79 #define PHYCLKRST_FSEL_PAD_20MHZ                (0x31 << 5)
  80 #define PHYCLKRST_FSEL_PAD_19_2MHZ              (0x38 << 5)
  81
  82 #define PHYCLKRST_RETENABLEN                    BIT(4)
  83
  84 #define PHYCLKRST_REFCLKSEL_MASK                (0x03 << 2)
  85 #define PHYCLKRST_REFCLKSEL_PAD_REFCLK          (0x2 << 2)
  86 #define PHYCLKRST_REFCLKSEL_EXT_REFCLK          (0x3 << 2)
  87
  88 #define PHYCLKRST_PORTRESET                     BIT(1)
  89 #define PHYCLKRST_COMMONONN                     BIT(0)
  90
  91 #define EXYNOS5_DRD_PHYREG0                     0x14
  92 #define EXYNOS5_DRD_PHYREG1                     0x18
  93
  94 #define EXYNOS5_DRD_PHYPARAM0                   0x1c
  95
  96 #define PHYPARAM0_REF_USE_PAD                   BIT(31)
  97 #define PHYPARAM0_REF_LOSLEVEL_MASK             (0x1f << 26)
  98 #define PHYPARAM0_REF_LOSLEVEL                  (0x9 << 26)
  99
 100 #define EXYNOS5_DRD_PHYPARAM1                   0x20
 101
 102 #define PHYPARAM1_PCS_TXDEEMPH_MASK             (0x1f << 0)
 103 #define PHYPARAM1_PCS_TXDEEMPH                  (0x1c)
 104
 105 #define EXYNOS5_DRD_PHYTERM                     0x24
 106
 107 #define EXYNOS5_DRD_PHYTEST                     0x28
 108
 109 #define PHYTEST_POWERDOWN_SSP                   BIT(3)
 110 #define PHYTEST_POWERDOWN_HSP                   BIT(2)
 111
 112 #define EXYNOS5_DRD_PHYADP                      0x2c
 113
 114 #define EXYNOS5_DRD_PHYUTMICLKSEL               0x30
 115
 116 #define PHYUTMICLKSEL_UTMI_CLKSEL               BIT(2)
 117
 118 #define EXYNOS5_DRD_PHYRESUME                   0x34
 119 #define EXYNOS5_DRD_LINKPORT                    0x44
 120
 121 #define KHZ     1000
 122 #define MHZ     (KHZ * KHZ)
 123
 124 enum exynos5_usbdrd_phy_id {
 125         EXYNOS5_DRDPHY_UTMI,
 126         EXYNOS5_DRDPHY_PIPE3,
 127         EXYNOS5_DRDPHYS_NUM,
 128 };
 129
 130 struct phy_usb_instance;
 131 struct exynos5_usbdrd_phy;
 132
 133 struct exynos5_usbdrd_phy_config {
 134         u32 id;
 135         void (*phy_isol)(struct phy_usb_instance *inst, u32 on);
 136         void (*phy_init)(struct exynos5_usbdrd_phy *phy_drd);
 137         unsigned int (*set_refclk)(struct phy_usb_instance *inst);
 138 };
 139
 140 struct exynos5_usbdrd_phy_drvdata {
 141         const struct exynos5_usbdrd_phy_config *phy_cfg;
 142         u32 pmu_offset_usbdrd0_phy;
 143         u32 pmu_offset_usbdrd1_phy;
 144         bool has_common_clk_gate;
 145 };
 146
 147 /**
 148  * struct exynos5_usbdrd_phy - driver data for USB 3.0 PHY
 149  * @dev: pointer to device instance of this platform device
 150  * @reg_phy: usb phy controller register memory base
 151  * @clk: phy clock for register access
 152  * @pipeclk: clock for pipe3 phy
 153  * @utmiclk: clock for utmi+ phy
 154  * @itpclk: clock for ITP generation
 155  * @drv_data: pointer to SoC level driver data structure
 156  * @phys[]: array for 'EXYNOS5_DRDPHYS_NUM' number of PHY
 157  *          instances each with its 'phy' and 'phy_cfg'.
 158  * @extrefclk: frequency select settings when using 'separate
 159  *             reference clocks' for SS and HS operations
 160  * @ref_clk: reference clock to PHY block from which PHY's
 161  *           operational clocks are derived
 162  * vbus: VBUS regulator for phy
 163  * vbus_boost: Boost regulator for VBUS present on few Exynos boards
 164  */
 165 struct exynos5_usbdrd_phy {
 166         struct device *dev;
 167         void __iomem *reg_phy;
 168         struct clk *clk;
 169         struct clk *pipeclk;
 170         struct clk *utmiclk;
 171         struct clk *itpclk;
 172         const struct exynos5_usbdrd_phy_drvdata *drv_data;
 173         struct phy_usb_instance {
 174                 struct phy *phy;
 175                 u32 index;
 176                 struct regmap *reg_pmu;
 177                 u32 pmu_offset;
 178                 const struct exynos5_usbdrd_phy_config *phy_cfg;
 179         } phys[EXYNOS5_DRDPHYS_NUM];
 180         u32 extrefclk;
 181         struct clk *ref_clk;
 182         struct regulator *vbus;
 183         struct regulator *vbus_boost;
 184 };
 185
 186 static inline
 187 struct exynos5_usbdrd_phy *to_usbdrd_phy(struct phy_usb_instance *inst)
 188 {
 189         return container_of((inst), struct exynos5_usbdrd_phy,
 190                             phys[(inst)->index]);
 191 }
 192
 193 /*
 194  * exynos5_rate_to_clk() converts the supplied clock rate to the value that
 195  * can be written to the phy register.
 196  */
 197 static unsigned int exynos5_rate_to_clk(unsigned long rate, u32 *reg)
 198 {
 199         /* EXYNOS5_FSEL_MASK */
 200
 201         switch (rate) {
 202         case 9600 * KHZ:
 203                 *reg = EXYNOS5_FSEL_9MHZ6;
 204                 break;
 205         case 10 * MHZ:
 206                 *reg = EXYNOS5_FSEL_10MHZ;
 207                 break;
 208         case 12 * MHZ:
 209                 *reg = EXYNOS5_FSEL_12MHZ;
 210                 break;
 211         case 19200 * KHZ:
 212                 *reg = EXYNOS5_FSEL_19MHZ2;
 213                 break;
 214         case 20 * MHZ:
 215                 *reg = EXYNOS5_FSEL_20MHZ;
 216                 break;
 217         case 24 * MHZ:
 218                 *reg = EXYNOS5_FSEL_24MHZ;
 219                 break;
 220         case 50 * MHZ:
 221                 *reg = EXYNOS5_FSEL_50MHZ;
 222                 break;
 223         default:
 224                 return -EINVAL;
 225         }
 226
 227         return 0;
 228 }
 229
 230 static void exynos5_usbdrd_phy_isol(struct phy_usb_instance *inst,
 231                                                 unsigned int on)
 232 {
 233         unsigned int val;
 234
 235         if (!inst->reg_pmu)
 236                 return;
 237
 238         val = on ? 0 : EXYNOS5_PHY_ENABLE;
 239
 240         regmap_update_bits(inst->reg_pmu, inst->pmu_offset,
 241                            EXYNOS5_PHY_ENABLE, val);
 242 }
 243
 244 /*
 245  * Sets the pipe3 phy's clk as EXTREFCLK (XXTI) which is internal clock
 246  * from clock core. Further sets multiplier values and spread spectrum
 247  * clock settings for SuperSpeed operations.
 248  */
 249 static unsigned int
 250 exynos5_usbdrd_pipe3_set_refclk(struct phy_usb_instance *inst)
 251 {
 252         static u32 reg;
 253         struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
 254
 255         /* restore any previous reference clock settings */
 256         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
 257
 258         /* Use EXTREFCLK as ref clock */
 259         reg &= ~PHYCLKRST_REFCLKSEL_MASK;
 260         reg |=  PHYCLKRST_REFCLKSEL_EXT_REFCLK;
 261
 262         /* FSEL settings corresponding to reference clock */
 263         reg &= ~PHYCLKRST_FSEL_PIPE_MASK |
 264                 PHYCLKRST_MPLL_MULTIPLIER_MASK |
 265                 PHYCLKRST_SSC_REFCLKSEL_MASK;
 266         switch (phy_drd->extrefclk) {
 267         case EXYNOS5_FSEL_50MHZ:
 268                 reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF |
 269                         PHYCLKRST_SSC_REFCLKSEL(0x00));
 270                 break;
 271         case EXYNOS5_FSEL_24MHZ:
 272                 reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
 273                         PHYCLKRST_SSC_REFCLKSEL(0x88));
 274                 break;
 275         case EXYNOS5_FSEL_20MHZ:
 276                 reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF |
 277                         PHYCLKRST_SSC_REFCLKSEL(0x00));
 278                 break;
 279         case EXYNOS5_FSEL_19MHZ2:
 280                 reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF |
 281                         PHYCLKRST_SSC_REFCLKSEL(0x88));
 282                 break;
 283         default:
 284                 dev_dbg(phy_drd->dev, "unsupported ref clk\n");
 285                 break;
 286         }
 287
 288         return reg;
 289 }
 290
 291 /*
 292  * Sets the utmi phy's clk as EXTREFCLK (XXTI) which is internal clock
 293  * from clock core. Further sets the FSEL values for HighSpeed operations.
 294  */
 295 static unsigned int
 296 exynos5_usbdrd_utmi_set_refclk(struct phy_usb_instance *inst)
 297 {
 298         static u32 reg;
 299         struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
 300
 301         /* restore any previous reference clock settings */
 302         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
 303
 304         reg &= ~PHYCLKRST_REFCLKSEL_MASK;
 305         reg |=  PHYCLKRST_REFCLKSEL_EXT_REFCLK;
 306
 307         reg &= ~PHYCLKRST_FSEL_UTMI_MASK |
 308                 PHYCLKRST_MPLL_MULTIPLIER_MASK |
 309                 PHYCLKRST_SSC_REFCLKSEL_MASK;
 310         reg |= PHYCLKRST_FSEL(phy_drd->extrefclk);
 311
 312         return reg;
 313 }
 314
 315 static void exynos5_usbdrd_pipe3_init(struct exynos5_usbdrd_phy *phy_drd)
 316 {
 317         u32 reg;
 318
 319         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
 320         /* Set Tx De-Emphasis level */
 321         reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
 322         reg |=  PHYPARAM1_PCS_TXDEEMPH;
 323         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
 324
 325         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
 326         reg &= ~PHYTEST_POWERDOWN_SSP;
 327         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
 328 }
 329
 330 static void exynos5_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
 331 {
 332         u32 reg;
 333
 334         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
 335         /* Set Loss-of-Signal Detector sensitivity */
 336         reg &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
 337         reg |=  PHYPARAM0_REF_LOSLEVEL;
 338         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
 339
 340         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
 341         /* Set Tx De-Emphasis level */
 342         reg &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
 343         reg |=  PHYPARAM1_PCS_TXDEEMPH;
 344         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM1);
 345
 346         /* UTMI Power Control */
 347         writel(PHYUTMI_OTGDISABLE, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI);
 348
 349         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
 350         reg &= ~PHYTEST_POWERDOWN_HSP;
 351         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
 352 }
 353
 354 static int exynos5_usbdrd_phy_init(struct phy *phy)
 355 {
 356         int ret;
 357         u32 reg;
 358         struct phy_usb_instance *inst = phy_get_drvdata(phy);
 359         struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
 360
 361         ret = clk_prepare_enable(phy_drd->clk);
 362         if (ret)
 363                 return ret;
 364
 365         /* Reset USB 3.0 PHY */
 366         writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
 367         writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYRESUME);
 368
 369         /*
 370          * Setting the Frame length Adj value[6:1] to default 0x20
 371          * See xHCI 1.0 spec, 5.2.4
 372          */
 373         reg =   LINKSYSTEM_XHCI_VERSION_CONTROL |
 374                 LINKSYSTEM_FLADJ(0x20);
 375         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_LINKSYSTEM);
 376
 377         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
 378         /* Select PHY CLK source */
 379         reg &= ~PHYPARAM0_REF_USE_PAD;
 380         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
 381
 382         /* This bit must be set for both HS and SS operations */
 383         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMICLKSEL);
 384         reg |= PHYUTMICLKSEL_UTMI_CLKSEL;
 385         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMICLKSEL);
 386
 387         /* UTMI or PIPE3 specific init */
 388         inst->phy_cfg->phy_init(phy_drd);
 389
 390         /* reference clock settings */
 391         reg = inst->phy_cfg->set_refclk(inst);
 392
 393                 /* Digital power supply in normal operating mode */
 394         reg |=  PHYCLKRST_RETENABLEN |
 395                 /* Enable ref clock for SS function */
 396                 PHYCLKRST_REF_SSP_EN |
 397                 /* Enable spread spectrum */
 398                 PHYCLKRST_SSC_EN |
 399                 /* Power down HS Bias and PLL blocks in suspend mode */
 400                 PHYCLKRST_COMMONONN |
 401                 /* Reset the port */
 402                 PHYCLKRST_PORTRESET;
 403
 404         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
 405
 406         udelay(10);
 407
 408         reg &= ~PHYCLKRST_PORTRESET;
 409         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
 410
 411         clk_disable_unprepare(phy_drd->clk);
 412
 413         return 0;
 414 }
 415
 416 static int exynos5_usbdrd_phy_exit(struct phy *phy)
 417 {
 418         int ret;
 419         u32 reg;
 420         struct phy_usb_instance *inst = phy_get_drvdata(phy);
 421         struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
 422
 423         ret = clk_prepare_enable(phy_drd->clk);
 424         if (ret)
 425                 return ret;
 426
 427         reg =   PHYUTMI_OTGDISABLE |
 428                 PHYUTMI_FORCESUSPEND |
 429                 PHYUTMI_FORCESLEEP;
 430         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI);
 431
 432         /* Resetting the PHYCLKRST enable bits to reduce leakage current */
 433         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
 434         reg &= ~(PHYCLKRST_REF_SSP_EN |
 435                  PHYCLKRST_SSC_EN |
 436                  PHYCLKRST_COMMONONN);
 437         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
 438
 439         /* Control PHYTEST to remove leakage current */
 440         reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
 441         reg |=  PHYTEST_POWERDOWN_SSP |
 442                 PHYTEST_POWERDOWN_HSP;
 443         writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
 444
 445         clk_disable_unprepare(phy_drd->clk);
 446
 447         return 0;
 448 }
 449
 450 static int exynos5_usbdrd_phy_power_on(struct phy *phy)
 451 {
 452         int ret;
 453         struct phy_usb_instance *inst = phy_get_drvdata(phy);
 454         struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
 455
 456         dev_dbg(phy_drd->dev, "Request to power_on usbdrd_phy phy\n");
 457
 458         clk_prepare_enable(phy_drd->ref_clk);
 459         if (!phy_drd->drv_data->has_common_clk_gate) {
 460                 clk_prepare_enable(phy_drd->pipeclk);
 461                 clk_prepare_enable(phy_drd->utmiclk);
 462                 clk_prepare_enable(phy_drd->itpclk);
 463         }
 464
 465         /* Enable VBUS supply */
 466         if (phy_drd->vbus_boost) {
 467                 ret = regulator_enable(phy_drd->vbus_boost);
 468                 if (ret) {
 469                         dev_err(phy_drd->dev,
 470                                 "Failed to enable VBUS boost supply\n");
 471                         goto fail_vbus;
 472                 }
 473         }
 474
 475         if (phy_drd->vbus) {
 476                 ret = regulator_enable(phy_drd->vbus);
 477                 if (ret) {
 478                         dev_err(phy_drd->dev, "Failed to enable VBUS supply\n");
 479                         goto fail_vbus_boost;
 480                 }
 481         }
 482
 483         /* Power-on PHY*/
 484         inst->phy_cfg->phy_isol(inst, 0);
 485
 486         return 0;
 487
 488 fail_vbus_boost:
 489         if (phy_drd->vbus_boost)
 490                 regulator_disable(phy_drd->vbus_boost);
 491
 492 fail_vbus:
 493         clk_disable_unprepare(phy_drd->ref_clk);
 494         if (!phy_drd->drv_data->has_common_clk_gate) {
 495                 clk_disable_unprepare(phy_drd->itpclk);
 496                 clk_disable_unprepare(phy_drd->utmiclk);
 497                 clk_disable_unprepare(phy_drd->pipeclk);
 498         }
 499
 500         return ret;
 501 }
 502
 503 static int exynos5_usbdrd_phy_power_off(struct phy *phy)
 504 {
 505         struct phy_usb_instance *inst = phy_get_drvdata(phy);
 506         struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
 507
 508         dev_dbg(phy_drd->dev, "Request to power_off usbdrd_phy phy\n");
 509
 510         /* Power-off the PHY */
 511         inst->phy_cfg->phy_isol(inst, 1);
 512
 513         /* Disable VBUS supply */
 514         if (phy_drd->vbus)
 515                 regulator_disable(phy_drd->vbus);
 516         if (phy_drd->vbus_boost)
 517                 regulator_disable(phy_drd->vbus_boost);
 518
 519         clk_disable_unprepare(phy_drd->ref_clk);
 520         if (!phy_drd->drv_data->has_common_clk_gate) {
 521                 clk_disable_unprepare(phy_drd->itpclk);
 522                 clk_disable_unprepare(phy_drd->pipeclk);
 523                 clk_disable_unprepare(phy_drd->utmiclk);
 524         }
 525
 526         return 0;
 527 }
 528
 529 static struct phy *exynos5_usbdrd_phy_xlate(struct device *dev,
 530                                         struct of_phandle_args *args)
 531 {
 532         struct exynos5_usbdrd_phy *phy_drd = dev_get_drvdata(dev);
 533
 534         if (WARN_ON(args->args[0] >= EXYNOS5_DRDPHYS_NUM))
 535                 return ERR_PTR(-ENODEV);
 536
 537         return phy_drd->phys[args->args[0]].phy;
 538 }
 539
 540 static struct phy_ops exynos5_usbdrd_phy_ops = {
 541         .init           = exynos5_usbdrd_phy_init,
 542         .exit           = exynos5_usbdrd_phy_exit,
 543         .power_on       = exynos5_usbdrd_phy_power_on,
 544         .power_off      = exynos5_usbdrd_phy_power_off,
 545         .owner          = THIS_MODULE,
 546 };
 547
 548 static int exynos5_usbdrd_phy_clk_handle(struct exynos5_usbdrd_phy *phy_drd)
 549 {
 550         unsigned long ref_rate;
 551         int ret;
 552
 553         phy_drd->clk = devm_clk_get(phy_drd->dev, "phy");
 554         if (IS_ERR(phy_drd->clk)) {
 555                 dev_err(phy_drd->dev, "Failed to get phy clock\n");
 556                 return PTR_ERR(phy_drd->clk);
 557         }
 558
 559         phy_drd->ref_clk = devm_clk_get(phy_drd->dev, "ref");
 560         if (IS_ERR(phy_drd->ref_clk)) {
 561                 dev_err(phy_drd->dev, "Failed to get phy reference clock\n");
 562                 return PTR_ERR(phy_drd->ref_clk);
 563         }
 564         ref_rate = clk_get_rate(phy_drd->ref_clk);
 565
 566         ret = exynos5_rate_to_clk(ref_rate, &phy_drd->extrefclk);
 567         if (ret) {
 568                 dev_err(phy_drd->dev, "Clock rate (%ld) not supported\n",
 569                         ref_rate);
 570                 return ret;
 571         }
 572
 573         if (!phy_drd->drv_data->has_common_clk_gate) {
 574                 phy_drd->pipeclk = devm_clk_get(phy_drd->dev, "phy_pipe");
 575                 if (IS_ERR(phy_drd->pipeclk)) {
 576                         dev_info(phy_drd->dev,
 577                                  "PIPE3 phy operational clock not specified\n");
 578                         phy_drd->pipeclk = NULL;
 579                 }
 580
 581                 phy_drd->utmiclk = devm_clk_get(phy_drd->dev, "phy_utmi");
 582                 if (IS_ERR(phy_drd->utmiclk)) {
 583                         dev_info(phy_drd->dev,
 584                                  "UTMI phy operational clock not specified\n");
 585                         phy_drd->utmiclk = NULL;
 586                 }
 587
 588                 phy_drd->itpclk = devm_clk_get(phy_drd->dev, "itp");
 589                 if (IS_ERR(phy_drd->itpclk)) {
 590                         dev_info(phy_drd->dev,
 591                                  "ITP clock from main OSC not specified\n");
 592                         phy_drd->itpclk = NULL;
 593                 }
 594         }
 595
 596         return 0;
 597 }
 598
 599 static const struct exynos5_usbdrd_phy_config phy_cfg_exynos5[] = {
 600         {
 601                 .id             = EXYNOS5_DRDPHY_UTMI,
 602                 .phy_isol       = exynos5_usbdrd_phy_isol,
 603                 .phy_init       = exynos5_usbdrd_utmi_init,
 604                 .set_refclk     = exynos5_usbdrd_utmi_set_refclk,
 605         },
 606         {
 607                 .id             = EXYNOS5_DRDPHY_PIPE3,
 608                 .phy_isol       = exynos5_usbdrd_phy_isol,
 609                 .phy_init       = exynos5_usbdrd_pipe3_init,
 610                 .set_refclk     = exynos5_usbdrd_pipe3_set_refclk,
 611         },
 612 };
 613
 614 static const struct exynos5_usbdrd_phy_drvdata exynos5420_usbdrd_phy = {
 615         .phy_cfg                = phy_cfg_exynos5,
 616         .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
 617         .pmu_offset_usbdrd1_phy = EXYNOS5420_USBDRD1_PHY_CONTROL,
 618         .has_common_clk_gate    = true,
 619 };
 620
 621 static const struct exynos5_usbdrd_phy_drvdata exynos5250_usbdrd_phy = {
 622         .phy_cfg                = phy_cfg_exynos5,
 623         .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
 624         .has_common_clk_gate    = true,
 625 };
 626
 627 static const struct exynos5_usbdrd_phy_drvdata exynos7_usbdrd_phy = {
 628         .phy_cfg                = phy_cfg_exynos5,
 629         .pmu_offset_usbdrd0_phy = EXYNOS5_USBDRD_PHY_CONTROL,
 630         .has_common_clk_gate    = false,
 631 };
 632
 633 static const struct of_device_id exynos5_usbdrd_phy_of_match[] = {
 634         {
 635                 .compatible = "samsung,exynos5250-usbdrd-phy",
 636                 .data = &exynos5250_usbdrd_phy
 637         }, {
 638                 .compatible = "samsung,exynos5420-usbdrd-phy",
 639                 .data = &exynos5420_usbdrd_phy
 640         }, {
 641                 .compatible = "samsung,exynos7-usbdrd-phy",
 642                 .data = &exynos7_usbdrd_phy
 643         },
 644         { },
 645 };
 646 MODULE_DEVICE_TABLE(of, exynos5_usbdrd_phy_of_match);
 647
 648 static int exynos5_usbdrd_phy_probe(struct platform_device *pdev)
 649 {
 650         struct device *dev = &pdev->dev;
 651         struct device_node *node = dev->of_node;
 652         struct exynos5_usbdrd_phy *phy_drd;
 653         struct phy_provider *phy_provider;
 654         struct resource *res;
 655         const struct of_device_id *match;
 656         const struct exynos5_usbdrd_phy_drvdata *drv_data;
 657         struct regmap *reg_pmu;
 658         u32 pmu_offset;
 659         int i, ret;
 660         int channel;
 661
 662         phy_drd = devm_kzalloc(dev, sizeof(*phy_drd), GFP_KERNEL);
 663         if (!phy_drd)
 664                 return -ENOMEM;
 665
 666         dev_set_drvdata(dev, phy_drd);
 667         phy_drd->dev = dev;
 668
 669         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 670         phy_drd->reg_phy = devm_ioremap_resource(dev, res);
 671         if (IS_ERR(phy_drd->reg_phy))
 672                 return PTR_ERR(phy_drd->reg_phy);
 673
 674         match = of_match_node(exynos5_usbdrd_phy_of_match, pdev->dev.of_node);
 675
 676         drv_data = match->data;
 677         phy_drd->drv_data = drv_data;
 678
 679         ret = exynos5_usbdrd_phy_clk_handle(phy_drd);
 680         if (ret) {
 681                 dev_err(dev, "Failed to initialize clocks\n");
 682                 return ret;
 683         }
 684
 685         reg_pmu = syscon_regmap_lookup_by_phandle(dev->of_node,
 686                                                    "samsung,pmu-syscon");
 687         if (IS_ERR(reg_pmu)) {
 688                 dev_err(dev, "Failed to lookup PMU regmap\n");
 689                 return PTR_ERR(reg_pmu);
 690         }
 691
 692         /*
 693          * Exynos5420 SoC has multiple channels for USB 3.0 PHY, with
 694          * each having separate power control registers.
 695          * 'channel' facilitates to set such registers.
 696          */
 697         channel = of_alias_get_id(node, "usbdrdphy");
 698         if (channel < 0)
 699                 dev_dbg(dev, "Not a multi-controller usbdrd phy\n");
 700
 701         switch (channel) {
 702         case 1:
 703                 pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd1_phy;
 704                 break;
 705         case 0:
 706         default:
 707                 pmu_offset = phy_drd->drv_data->pmu_offset_usbdrd0_phy;
 708                 break;
 709         }
 710
 711         /* Get Vbus regulators */
 712         phy_drd->vbus = devm_regulator_get(dev, "vbus");
 713         if (IS_ERR(phy_drd->vbus)) {
 714                 ret = PTR_ERR(phy_drd->vbus);
 715                 if (ret == -EPROBE_DEFER)
 716                         return ret;
 717
 718                 dev_warn(dev, "Failed to get VBUS supply regulator\n");
 719                 phy_drd->vbus = NULL;
 720         }
 721
 722         phy_drd->vbus_boost = devm_regulator_get(dev, "vbus-boost");
 723         if (IS_ERR(phy_drd->vbus_boost)) {
 724                 ret = PTR_ERR(phy_drd->vbus_boost);
 725                 if (ret == -EPROBE_DEFER)
 726                         return ret;
 727
 728                 dev_warn(dev, "Failed to get VBUS boost supply regulator\n");
 729                 phy_drd->vbus_boost = NULL;
 730         }
 731
 732         dev_vdbg(dev, "Creating usbdrd_phy phy\n");
 733
 734         for (i = 0; i < EXYNOS5_DRDPHYS_NUM; i++) {
 735                 struct phy *phy = devm_phy_create(dev, NULL,
 736                                                   &exynos5_usbdrd_phy_ops);
 737                 if (IS_ERR(phy)) {
 738                         dev_err(dev, "Failed to create usbdrd_phy phy\n");
 739                         return PTR_ERR(phy);
 740                 }
 741
 742                 phy_drd->phys[i].phy = phy;
 743                 phy_drd->phys[i].index = i;
 744                 phy_drd->phys[i].reg_pmu = reg_pmu;
 745                 phy_drd->phys[i].pmu_offset = pmu_offset;
 746                 phy_drd->phys[i].phy_cfg = &drv_data->phy_cfg[i];
 747                 phy_set_drvdata(phy, &phy_drd->phys[i]);
 748         }
 749
 750         phy_provider = devm_of_phy_provider_register(dev,
 751                                                      exynos5_usbdrd_phy_xlate);
 752         if (IS_ERR(phy_provider)) {
 753                 dev_err(phy_drd->dev, "Failed to register phy provider\n");
 754                 return PTR_ERR(phy_provider);
 755         }
 756
 757         return 0;
 758 }
 759
 760 static struct platform_driver exynos5_usb3drd_phy = {
 761         .probe  = exynos5_usbdrd_phy_probe,
 762         .driver = {
 763                 .of_match_table = exynos5_usbdrd_phy_of_match,
 764                 .name           = "exynos5_usb3drd_phy",
 765         }
 766 };
 767
 768 module_platform_driver(exynos5_usb3drd_phy);
 769 MODULE_DESCRIPTION("Samsung EXYNOS5 SoCs USB 3.0 DRD controller PHY driver");
 770 MODULE_AUTHOR("Vivek Gautam <gautam.vivek@samsung.com>");
 771 MODULE_LICENSE("GPL v2");
 772 MODULE_ALIAS("platform:exynos5_usb3drd_phy");