drivers/mmc/host/dw_mmc-exynos.c

   1 /*
   2  * Exynos Specific Extensions for Synopsys DW Multimedia Card Interface driver
   3  *
   4  * Copyright (C) 2012, Samsung Electronics Co., Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/clk.h>
  15 #include <linux/mmc/host.h>
  16 #include <linux/mmc/mmc.h>
  17 #include <linux/of.h>
  18 #include <linux/of_gpio.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/slab.h>
  21
  22 #include "dw_mmc.h"
  23 #include "dw_mmc-pltfm.h"
  24 #include "dw_mmc-exynos.h"
  25
  26 /* Variations in Exynos specific dw-mshc controller */
  27 enum dw_mci_exynos_type {
  28         DW_MCI_TYPE_EXYNOS4210,
  29         DW_MCI_TYPE_EXYNOS4412,
  30         DW_MCI_TYPE_EXYNOS5250,
  31         DW_MCI_TYPE_EXYNOS5420,
  32         DW_MCI_TYPE_EXYNOS5420_SMU,
  33         DW_MCI_TYPE_EXYNOS7,
  34         DW_MCI_TYPE_EXYNOS7_SMU,
  35 };
  36
  37 /* Exynos implementation specific driver private data */
  38 struct dw_mci_exynos_priv_data {
  39         enum dw_mci_exynos_type         ctrl_type;
  40         u8                              ciu_div;
  41         u32                             sdr_timing;
  42         u32                             ddr_timing;
  43         u32                             hs400_timing;
  44         u32                             tuned_sample;
  45         u32                             cur_speed;
  46         u32                             dqs_delay;
  47         u32                             saved_dqs_en;
  48         u32                             saved_strobe_ctrl;
  49 };
  50
  51 static struct dw_mci_exynos_compatible {
  52         char                            *compatible;
  53         enum dw_mci_exynos_type         ctrl_type;
  54 } exynos_compat[] = {
  55         {
  56                 .compatible     = "samsung,exynos4210-dw-mshc",
  57                 .ctrl_type      = DW_MCI_TYPE_EXYNOS4210,
  58         }, {
  59                 .compatible     = "samsung,exynos4412-dw-mshc",
  60                 .ctrl_type      = DW_MCI_TYPE_EXYNOS4412,
  61         }, {
  62                 .compatible     = "samsung,exynos5250-dw-mshc",
  63                 .ctrl_type      = DW_MCI_TYPE_EXYNOS5250,
  64         }, {
  65                 .compatible     = "samsung,exynos5420-dw-mshc",
  66                 .ctrl_type      = DW_MCI_TYPE_EXYNOS5420,
  67         }, {
  68                 .compatible     = "samsung,exynos5420-dw-mshc-smu",
  69                 .ctrl_type      = DW_MCI_TYPE_EXYNOS5420_SMU,
  70         }, {
  71                 .compatible     = "samsung,exynos7-dw-mshc",
  72                 .ctrl_type      = DW_MCI_TYPE_EXYNOS7,
  73         }, {
  74                 .compatible     = "samsung,exynos7-dw-mshc-smu",
  75                 .ctrl_type      = DW_MCI_TYPE_EXYNOS7_SMU,
  76         },
  77 };
  78
  79 static inline u8 dw_mci_exynos_get_ciu_div(struct dw_mci *host)
  80 {
  81         struct dw_mci_exynos_priv_data *priv = host->priv;
  82
  83         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4412)
  84                 return EXYNOS4412_FIXED_CIU_CLK_DIV;
  85         else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4210)
  86                 return EXYNOS4210_FIXED_CIU_CLK_DIV;
  87         else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
  88                         priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
  89                 return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL64)) + 1;
  90         else
  91                 return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL)) + 1;
  92 }
  93
  94 static void dw_mci_exynos_config_smu(struct dw_mci *host)
  95 {
  96         struct dw_mci_exynos_priv_data *priv = host->priv;
  97
  98         /*
  99          * If Exynos is provided the Security management,
 100          * set for non-ecryption mode at this time.
 101          */
 102         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5420_SMU ||
 103                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) {
 104                 mci_writel(host, MPSBEGIN0, 0);
 105                 mci_writel(host, MPSEND0, SDMMC_ENDING_SEC_NR_MAX);
 106                 mci_writel(host, MPSCTRL0, SDMMC_MPSCTRL_SECURE_WRITE_BIT |
 107                            SDMMC_MPSCTRL_NON_SECURE_READ_BIT |
 108                            SDMMC_MPSCTRL_VALID |
 109                            SDMMC_MPSCTRL_NON_SECURE_WRITE_BIT);
 110         }
 111 }
 112
 113 static int dw_mci_exynos_priv_init(struct dw_mci *host)
 114 {
 115         struct dw_mci_exynos_priv_data *priv = host->priv;
 116
 117         dw_mci_exynos_config_smu(host);
 118
 119         if (priv->ctrl_type >= DW_MCI_TYPE_EXYNOS5420) {
 120                 priv->saved_strobe_ctrl = mci_readl(host, HS400_DLINE_CTRL);
 121                 priv->saved_dqs_en = mci_readl(host, HS400_DQS_EN);
 122                 priv->saved_dqs_en |= AXI_NON_BLOCKING_WR;
 123                 mci_writel(host, HS400_DQS_EN, priv->saved_dqs_en);
 124                 if (!priv->dqs_delay)
 125                         priv->dqs_delay =
 126                                 DQS_CTRL_GET_RD_DELAY(priv->saved_strobe_ctrl);
 127         }
 128
 129         host->bus_hz /= (priv->ciu_div + 1);
 130
 131         return 0;
 132 }
 133
 134 static void dw_mci_exynos_set_clksel_timing(struct dw_mci *host, u32 timing)
 135 {
 136         struct dw_mci_exynos_priv_data *priv = host->priv;
 137         u32 clksel;
 138
 139         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 140                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 141                 clksel = mci_readl(host, CLKSEL64);
 142         else
 143                 clksel = mci_readl(host, CLKSEL);
 144
 145         clksel = (clksel & ~SDMMC_CLKSEL_TIMING_MASK) | timing;
 146
 147         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 148                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 149                 mci_writel(host, CLKSEL64, clksel);
 150         else
 151                 mci_writel(host, CLKSEL, clksel);
 152
 153         /*
 154          * Exynos4412 and Exynos5250 extends the use of CMD register with the
 155          * use of bit 29 (which is reserved on standard MSHC controllers) for
 156          * optionally bypassing the HOLD register for command and data. The
 157          * HOLD register should be bypassed in case there is no phase shift
 158          * applied on CMD/DATA that is sent to the card.
 159          */
 160         if (!SDMMC_CLKSEL_GET_DRV_WD3(clksel) && host->cur_slot)
 161                 set_bit(DW_MMC_CARD_NO_USE_HOLD, &host->cur_slot->flags);
 162 }
 163
 164 #ifdef CONFIG_PM
 165 static int dw_mci_exynos_runtime_resume(struct device *dev)
 166 {
 167         struct dw_mci *host = dev_get_drvdata(dev);
 168
 169         dw_mci_exynos_config_smu(host);
 170         return dw_mci_runtime_resume(dev);
 171 }
 172
 173 /**
 174  * dw_mci_exynos_resume_noirq - Exynos-specific resume code
 175  *
 176  * On exynos5420 there is a silicon errata that will sometimes leave the
 177  * WAKEUP_INT bit in the CLKSEL register asserted.  This bit is 1 to indicate
 178  * that it fired and we can clear it by writing a 1 back.  Clear it to prevent
 179  * interrupts from going off constantly.
 180  *
 181  * We run this code on all exynos variants because it doesn't hurt.
 182  */
 183
 184 static int dw_mci_exynos_resume_noirq(struct device *dev)
 185 {
 186         struct dw_mci *host = dev_get_drvdata(dev);
 187         struct dw_mci_exynos_priv_data *priv = host->priv;
 188         u32 clksel;
 189
 190         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 191                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 192                 clksel = mci_readl(host, CLKSEL64);
 193         else
 194                 clksel = mci_readl(host, CLKSEL);
 195
 196         if (clksel & SDMMC_CLKSEL_WAKEUP_INT) {
 197                 if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 198                         priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 199                         mci_writel(host, CLKSEL64, clksel);
 200                 else
 201                         mci_writel(host, CLKSEL, clksel);
 202         }
 203
 204         return 0;
 205 }
 206 #else
 207 #define dw_mci_exynos_resume_noirq      NULL
 208 #endif /* CONFIG_PM */
 209
 210 static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing)
 211 {
 212         struct dw_mci_exynos_priv_data *priv = host->priv;
 213         u32 dqs, strobe;
 214
 215         /*
 216          * Not supported to configure register
 217          * related to HS400
 218          */
 219         if (priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) {
 220                 if (timing == MMC_TIMING_MMC_HS400)
 221                         dev_warn(host->dev,
 222                                  "cannot configure HS400, unsupported chipset\n");
 223                 return;
 224         }
 225
 226         dqs = priv->saved_dqs_en;
 227         strobe = priv->saved_strobe_ctrl;
 228
 229         if (timing == MMC_TIMING_MMC_HS400) {
 230                 dqs |= DATA_STROBE_EN;
 231                 strobe = DQS_CTRL_RD_DELAY(strobe, priv->dqs_delay);
 232         } else {
 233                 dqs &= ~DATA_STROBE_EN;
 234         }
 235
 236         mci_writel(host, HS400_DQS_EN, dqs);
 237         mci_writel(host, HS400_DLINE_CTRL, strobe);
 238 }
 239
 240 static void dw_mci_exynos_adjust_clock(struct dw_mci *host, unsigned int wanted)
 241 {
 242         struct dw_mci_exynos_priv_data *priv = host->priv;
 243         unsigned long actual;
 244         u8 div;
 245         int ret;
 246         /*
 247          * Don't care if wanted clock is zero or
 248          * ciu clock is unavailable
 249          */
 250         if (!wanted || IS_ERR(host->ciu_clk))
 251                 return;
 252
 253         /* Guaranteed minimum frequency for cclkin */
 254         if (wanted < EXYNOS_CCLKIN_MIN)
 255                 wanted = EXYNOS_CCLKIN_MIN;
 256
 257         if (wanted == priv->cur_speed)
 258                 return;
 259
 260         div = dw_mci_exynos_get_ciu_div(host);
 261         ret = clk_set_rate(host->ciu_clk, wanted * div);
 262         if (ret)
 263                 dev_warn(host->dev,
 264                         "failed to set clk-rate %u error: %d\n",
 265                         wanted * div, ret);
 266         actual = clk_get_rate(host->ciu_clk);
 267         host->bus_hz = actual / div;
 268         priv->cur_speed = wanted;
 269         host->current_speed = 0;
 270 }
 271
 272 static void dw_mci_exynos_set_ios(struct dw_mci *host, struct mmc_ios *ios)
 273 {
 274         struct dw_mci_exynos_priv_data *priv = host->priv;
 275         unsigned int wanted = ios->clock;
 276         u32 timing = ios->timing, clksel;
 277
 278         switch (timing) {
 279         case MMC_TIMING_MMC_HS400:
 280                 /* Update tuned sample timing */
 281                 clksel = SDMMC_CLKSEL_UP_SAMPLE(
 282                                 priv->hs400_timing, priv->tuned_sample);
 283                 wanted <<= 1;
 284                 break;
 285         case MMC_TIMING_MMC_DDR52:
 286                 clksel = priv->ddr_timing;
 287                 /* Should be double rate for DDR mode */
 288                 if (ios->bus_width == MMC_BUS_WIDTH_8)
 289                         wanted <<= 1;
 290                 break;
 291         default:
 292                 clksel = priv->sdr_timing;
 293         }
 294
 295         /* Set clock timing for the requested speed mode*/
 296         dw_mci_exynos_set_clksel_timing(host, clksel);
 297
 298         /* Configure setting for HS400 */
 299         dw_mci_exynos_config_hs400(host, timing);
 300
 301         /* Configure clock rate */
 302         dw_mci_exynos_adjust_clock(host, wanted);
 303 }
 304
 305 static int dw_mci_exynos_parse_dt(struct dw_mci *host)
 306 {
 307         struct dw_mci_exynos_priv_data *priv;
 308         struct device_node *np = host->dev->of_node;
 309         u32 timing[2];
 310         u32 div = 0;
 311         int idx;
 312         int ret;
 313
 314         priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
 315         if (!priv)
 316                 return -ENOMEM;
 317
 318         for (idx = 0; idx < ARRAY_SIZE(exynos_compat); idx++) {
 319                 if (of_device_is_compatible(np, exynos_compat[idx].compatible))
 320                         priv->ctrl_type = exynos_compat[idx].ctrl_type;
 321         }
 322
 323         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4412)
 324                 priv->ciu_div = EXYNOS4412_FIXED_CIU_CLK_DIV - 1;
 325         else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4210)
 326                 priv->ciu_div = EXYNOS4210_FIXED_CIU_CLK_DIV - 1;
 327         else {
 328                 of_property_read_u32(np, "samsung,dw-mshc-ciu-div", &div);
 329                 priv->ciu_div = div;
 330         }
 331
 332         ret = of_property_read_u32_array(np,
 333                         "samsung,dw-mshc-sdr-timing", timing, 2);
 334         if (ret)
 335                 return ret;
 336
 337         priv->sdr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
 338
 339         ret = of_property_read_u32_array(np,
 340                         "samsung,dw-mshc-ddr-timing", timing, 2);
 341         if (ret)
 342                 return ret;
 343
 344         priv->ddr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
 345
 346         ret = of_property_read_u32_array(np,
 347                         "samsung,dw-mshc-hs400-timing", timing, 2);
 348         if (!ret && of_property_read_u32(np,
 349                                 "samsung,read-strobe-delay", &priv->dqs_delay))
 350                 dev_dbg(host->dev,
 351                         "read-strobe-delay is not found, assuming usage of default value\n");
 352
 353         priv->hs400_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1],
 354                                                 HS400_FIXED_CIU_CLK_DIV);
 355         host->priv = priv;
 356         return 0;
 357 }
 358
 359 static inline u8 dw_mci_exynos_get_clksmpl(struct dw_mci *host)
 360 {
 361         struct dw_mci_exynos_priv_data *priv = host->priv;
 362
 363         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 364                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 365                 return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL64));
 366         else
 367                 return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL));
 368 }
 369
 370 static inline void dw_mci_exynos_set_clksmpl(struct dw_mci *host, u8 sample)
 371 {
 372         u32 clksel;
 373         struct dw_mci_exynos_priv_data *priv = host->priv;
 374
 375         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 376                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 377                 clksel = mci_readl(host, CLKSEL64);
 378         else
 379                 clksel = mci_readl(host, CLKSEL);
 380         clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample);
 381         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 382                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 383                 mci_writel(host, CLKSEL64, clksel);
 384         else
 385                 mci_writel(host, CLKSEL, clksel);
 386 }
 387
 388 static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host)
 389 {
 390         struct dw_mci_exynos_priv_data *priv = host->priv;
 391         u32 clksel;
 392         u8 sample;
 393
 394         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 395                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 396                 clksel = mci_readl(host, CLKSEL64);
 397         else
 398                 clksel = mci_readl(host, CLKSEL);
 399
 400         sample = (clksel + 1) & 0x7;
 401         clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample);
 402
 403         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 404                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 405                 mci_writel(host, CLKSEL64, clksel);
 406         else
 407                 mci_writel(host, CLKSEL, clksel);
 408
 409         return sample;
 410 }
 411
 412 static s8 dw_mci_exynos_get_best_clksmpl(u8 candiates)
 413 {
 414         const u8 iter = 8;
 415         u8 __c;
 416         s8 i, loc = -1;
 417
 418         for (i = 0; i < iter; i++) {
 419                 __c = ror8(candiates, i);
 420                 if ((__c & 0xc7) == 0xc7) {
 421                         loc = i;
 422                         goto out;
 423                 }
 424         }
 425
 426         for (i = 0; i < iter; i++) {
 427                 __c = ror8(candiates, i);
 428                 if ((__c & 0x83) == 0x83) {
 429                         loc = i;
 430                         goto out;
 431                 }
 432         }
 433
 434 out:
 435         return loc;
 436 }
 437
 438 static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
 439 {
 440         struct dw_mci *host = slot->host;
 441         struct dw_mci_exynos_priv_data *priv = host->priv;
 442         struct mmc_host *mmc = slot->mmc;
 443         u8 start_smpl, smpl, candiates = 0;
 444         s8 found = -1;
 445         int ret = 0;
 446
 447         start_smpl = dw_mci_exynos_get_clksmpl(host);
 448
 449         do {
 450                 mci_writel(host, TMOUT, ~0);
 451                 smpl = dw_mci_exynos_move_next_clksmpl(host);
 452
 453                 if (!mmc_send_tuning(mmc, opcode, NULL))
 454                         candiates |= (1 << smpl);
 455
 456         } while (start_smpl != smpl);
 457
 458         found = dw_mci_exynos_get_best_clksmpl(candiates);
 459         if (found >= 0) {
 460                 dw_mci_exynos_set_clksmpl(host, found);
 461                 priv->tuned_sample = found;
 462         } else {
 463                 ret = -EIO;
 464         }
 465
 466         return ret;
 467 }
 468
 469 static int dw_mci_exynos_prepare_hs400_tuning(struct dw_mci *host,
 470                                         struct mmc_ios *ios)
 471 {
 472         struct dw_mci_exynos_priv_data *priv = host->priv;
 473
 474         dw_mci_exynos_set_clksel_timing(host, priv->hs400_timing);
 475         dw_mci_exynos_adjust_clock(host, (ios->clock) << 1);
 476
 477         return 0;
 478 }
 479
 480 /* Common capabilities of Exynos4/Exynos5 SoC */
 481 static unsigned long exynos_dwmmc_caps[4] = {
 482         MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23,
 483         MMC_CAP_CMD23,
 484         MMC_CAP_CMD23,
 485         MMC_CAP_CMD23,
 486 };
 487
 488 static const struct dw_mci_drv_data exynos_drv_data = {
 489         .caps                   = exynos_dwmmc_caps,
 490         .init                   = dw_mci_exynos_priv_init,
 491         .set_ios                = dw_mci_exynos_set_ios,
 492         .parse_dt               = dw_mci_exynos_parse_dt,
 493         .execute_tuning         = dw_mci_exynos_execute_tuning,
 494         .prepare_hs400_tuning   = dw_mci_exynos_prepare_hs400_tuning,
 495 };
 496
 497 static const struct of_device_id dw_mci_exynos_match[] = {
 498         { .compatible = "samsung,exynos4412-dw-mshc",
 499                         .data = &exynos_drv_data, },
 500         { .compatible = "samsung,exynos5250-dw-mshc",
 501                         .data = &exynos_drv_data, },
 502         { .compatible = "samsung,exynos5420-dw-mshc",
 503                         .data = &exynos_drv_data, },
 504         { .compatible = "samsung,exynos5420-dw-mshc-smu",
 505                         .data = &exynos_drv_data, },
 506         { .compatible = "samsung,exynos7-dw-mshc",
 507                         .data = &exynos_drv_data, },
 508         { .compatible = "samsung,exynos7-dw-mshc-smu",
 509                         .data = &exynos_drv_data, },
 510         {},
 511 };
 512 MODULE_DEVICE_TABLE(of, dw_mci_exynos_match);
 513
 514 static int dw_mci_exynos_probe(struct platform_device *pdev)
 515 {
 516         const struct dw_mci_drv_data *drv_data;
 517         const struct of_device_id *match;
 518         int ret;
 519
 520         match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
 521         drv_data = match->data;
 522
 523         pm_runtime_get_noresume(&pdev->dev);
 524         pm_runtime_set_active(&pdev->dev);
 525         pm_runtime_enable(&pdev->dev);
 526
 527         ret = dw_mci_pltfm_register(pdev, drv_data);
 528         if (ret) {
 529                 pm_runtime_disable(&pdev->dev);
 530                 pm_runtime_set_suspended(&pdev->dev);
 531                 pm_runtime_put_noidle(&pdev->dev);
 532
 533                 return ret;
 534         }
 535
 536         return 0;
 537 }
 538
 539 static int dw_mci_exynos_remove(struct platform_device *pdev)
 540 {
 541         pm_runtime_disable(&pdev->dev);
 542         pm_runtime_set_suspended(&pdev->dev);
 543         pm_runtime_put_noidle(&pdev->dev);
 544
 545         return dw_mci_pltfm_remove(pdev);
 546 }
 547
 548 static const struct dev_pm_ops dw_mci_exynos_pmops = {
 549         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 550                                 pm_runtime_force_resume)
 551         SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
 552                            dw_mci_exynos_runtime_resume,
 553                            NULL)
 554         .resume_noirq = dw_mci_exynos_resume_noirq,
 555         .thaw_noirq = dw_mci_exynos_resume_noirq,
 556         .restore_noirq = dw_mci_exynos_resume_noirq,
 557 };
 558
 559 static struct platform_driver dw_mci_exynos_pltfm_driver = {
 560         .probe          = dw_mci_exynos_probe,
 561         .remove         = dw_mci_exynos_remove,
 562         .driver         = {
 563                 .name           = "dwmmc_exynos",
 564                 .of_match_table = dw_mci_exynos_match,
 565                 .pm             = &dw_mci_exynos_pmops,
 566         },
 567 };
 568
 569 module_platform_driver(dw_mci_exynos_pltfm_driver);
 570
 571 MODULE_DESCRIPTION("Samsung Specific DW-MSHC Driver Extension");
 572 MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com");
 573 MODULE_LICENSE("GPL v2");
 574 MODULE_ALIAS("platform:dwmmc_exynos");