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->slot)
 161                 set_bit(DW_MMC_CARD_NO_USE_HOLD, &host->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         int ret;
 169
 170         ret = dw_mci_runtime_resume(dev);
 171         if (ret)
 172                 return ret;
 173
 174         dw_mci_exynos_config_smu(host);
 175
 176         return ret;
 177 }
 178
 179 /**
 180  * dw_mci_exynos_resume_noirq - Exynos-specific resume code
 181  *
 182  * On exynos5420 there is a silicon errata that will sometimes leave the
 183  * WAKEUP_INT bit in the CLKSEL register asserted.  This bit is 1 to indicate
 184  * that it fired and we can clear it by writing a 1 back.  Clear it to prevent
 185  * interrupts from going off constantly.
 186  *
 187  * We run this code on all exynos variants because it doesn't hurt.
 188  */
 189
 190 static int dw_mci_exynos_resume_noirq(struct device *dev)
 191 {
 192         struct dw_mci *host = dev_get_drvdata(dev);
 193         struct dw_mci_exynos_priv_data *priv = host->priv;
 194         u32 clksel;
 195
 196         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 197                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 198                 clksel = mci_readl(host, CLKSEL64);
 199         else
 200                 clksel = mci_readl(host, CLKSEL);
 201
 202         if (clksel & SDMMC_CLKSEL_WAKEUP_INT) {
 203                 if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 204                         priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 205                         mci_writel(host, CLKSEL64, clksel);
 206                 else
 207                         mci_writel(host, CLKSEL, clksel);
 208         }
 209
 210         return 0;
 211 }
 212 #else
 213 #define dw_mci_exynos_resume_noirq      NULL
 214 #endif /* CONFIG_PM */
 215
 216 static void dw_mci_exynos_config_hs400(struct dw_mci *host, u32 timing)
 217 {
 218         struct dw_mci_exynos_priv_data *priv = host->priv;
 219         u32 dqs, strobe;
 220
 221         /*
 222          * Not supported to configure register
 223          * related to HS400
 224          */
 225         if (priv->ctrl_type < DW_MCI_TYPE_EXYNOS5420) {
 226                 if (timing == MMC_TIMING_MMC_HS400)
 227                         dev_warn(host->dev,
 228                                  "cannot configure HS400, unsupported chipset\n");
 229                 return;
 230         }
 231
 232         dqs = priv->saved_dqs_en;
 233         strobe = priv->saved_strobe_ctrl;
 234
 235         if (timing == MMC_TIMING_MMC_HS400) {
 236                 dqs |= DATA_STROBE_EN;
 237                 strobe = DQS_CTRL_RD_DELAY(strobe, priv->dqs_delay);
 238         } else {
 239                 dqs &= ~DATA_STROBE_EN;
 240         }
 241
 242         mci_writel(host, HS400_DQS_EN, dqs);
 243         mci_writel(host, HS400_DLINE_CTRL, strobe);
 244 }
 245
 246 static void dw_mci_exynos_adjust_clock(struct dw_mci *host, unsigned int wanted)
 247 {
 248         struct dw_mci_exynos_priv_data *priv = host->priv;
 249         unsigned long actual;
 250         u8 div;
 251         int ret;
 252         /*
 253          * Don't care if wanted clock is zero or
 254          * ciu clock is unavailable
 255          */
 256         if (!wanted || IS_ERR(host->ciu_clk))
 257                 return;
 258
 259         /* Guaranteed minimum frequency for cclkin */
 260         if (wanted < EXYNOS_CCLKIN_MIN)
 261                 wanted = EXYNOS_CCLKIN_MIN;
 262
 263         if (wanted == priv->cur_speed)
 264                 return;
 265
 266         div = dw_mci_exynos_get_ciu_div(host);
 267         ret = clk_set_rate(host->ciu_clk, wanted * div);
 268         if (ret)
 269                 dev_warn(host->dev,
 270                         "failed to set clk-rate %u error: %d\n",
 271                         wanted * div, ret);
 272         actual = clk_get_rate(host->ciu_clk);
 273         host->bus_hz = actual / div;
 274         priv->cur_speed = wanted;
 275         host->current_speed = 0;
 276 }
 277
 278 static void dw_mci_exynos_set_ios(struct dw_mci *host, struct mmc_ios *ios)
 279 {
 280         struct dw_mci_exynos_priv_data *priv = host->priv;
 281         unsigned int wanted = ios->clock;
 282         u32 timing = ios->timing, clksel;
 283
 284         switch (timing) {
 285         case MMC_TIMING_MMC_HS400:
 286                 /* Update tuned sample timing */
 287                 clksel = SDMMC_CLKSEL_UP_SAMPLE(
 288                                 priv->hs400_timing, priv->tuned_sample);
 289                 wanted <<= 1;
 290                 break;
 291         case MMC_TIMING_MMC_DDR52:
 292                 clksel = priv->ddr_timing;
 293                 /* Should be double rate for DDR mode */
 294                 if (ios->bus_width == MMC_BUS_WIDTH_8)
 295                         wanted <<= 1;
 296                 break;
 297         default:
 298                 clksel = priv->sdr_timing;
 299         }
 300
 301         /* Set clock timing for the requested speed mode*/
 302         dw_mci_exynos_set_clksel_timing(host, clksel);
 303
 304         /* Configure setting for HS400 */
 305         dw_mci_exynos_config_hs400(host, timing);
 306
 307         /* Configure clock rate */
 308         dw_mci_exynos_adjust_clock(host, wanted);
 309 }
 310
 311 static int dw_mci_exynos_parse_dt(struct dw_mci *host)
 312 {
 313         struct dw_mci_exynos_priv_data *priv;
 314         struct device_node *np = host->dev->of_node;
 315         u32 timing[2];
 316         u32 div = 0;
 317         int idx;
 318         int ret;
 319
 320         priv = devm_kzalloc(host->dev, sizeof(*priv), GFP_KERNEL);
 321         if (!priv)
 322                 return -ENOMEM;
 323
 324         for (idx = 0; idx < ARRAY_SIZE(exynos_compat); idx++) {
 325                 if (of_device_is_compatible(np, exynos_compat[idx].compatible))
 326                         priv->ctrl_type = exynos_compat[idx].ctrl_type;
 327         }
 328
 329         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4412)
 330                 priv->ciu_div = EXYNOS4412_FIXED_CIU_CLK_DIV - 1;
 331         else if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS4210)
 332                 priv->ciu_div = EXYNOS4210_FIXED_CIU_CLK_DIV - 1;
 333         else {
 334                 of_property_read_u32(np, "samsung,dw-mshc-ciu-div", &div);
 335                 priv->ciu_div = div;
 336         }
 337
 338         ret = of_property_read_u32_array(np,
 339                         "samsung,dw-mshc-sdr-timing", timing, 2);
 340         if (ret)
 341                 return ret;
 342
 343         priv->sdr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
 344
 345         ret = of_property_read_u32_array(np,
 346                         "samsung,dw-mshc-ddr-timing", timing, 2);
 347         if (ret)
 348                 return ret;
 349
 350         priv->ddr_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1], div);
 351
 352         ret = of_property_read_u32_array(np,
 353                         "samsung,dw-mshc-hs400-timing", timing, 2);
 354         if (!ret && of_property_read_u32(np,
 355                                 "samsung,read-strobe-delay", &priv->dqs_delay))
 356                 dev_dbg(host->dev,
 357                         "read-strobe-delay is not found, assuming usage of default value\n");
 358
 359         priv->hs400_timing = SDMMC_CLKSEL_TIMING(timing[0], timing[1],
 360                                                 HS400_FIXED_CIU_CLK_DIV);
 361         host->priv = priv;
 362         return 0;
 363 }
 364
 365 static inline u8 dw_mci_exynos_get_clksmpl(struct dw_mci *host)
 366 {
 367         struct dw_mci_exynos_priv_data *priv = host->priv;
 368
 369         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 370                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 371                 return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL64));
 372         else
 373                 return SDMMC_CLKSEL_CCLK_SAMPLE(mci_readl(host, CLKSEL));
 374 }
 375
 376 static inline void dw_mci_exynos_set_clksmpl(struct dw_mci *host, u8 sample)
 377 {
 378         u32 clksel;
 379         struct dw_mci_exynos_priv_data *priv = host->priv;
 380
 381         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 382                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 383                 clksel = mci_readl(host, CLKSEL64);
 384         else
 385                 clksel = mci_readl(host, CLKSEL);
 386         clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample);
 387         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 388                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 389                 mci_writel(host, CLKSEL64, clksel);
 390         else
 391                 mci_writel(host, CLKSEL, clksel);
 392 }
 393
 394 static inline u8 dw_mci_exynos_move_next_clksmpl(struct dw_mci *host)
 395 {
 396         struct dw_mci_exynos_priv_data *priv = host->priv;
 397         u32 clksel;
 398         u8 sample;
 399
 400         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 401                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 402                 clksel = mci_readl(host, CLKSEL64);
 403         else
 404                 clksel = mci_readl(host, CLKSEL);
 405
 406         sample = (clksel + 1) & 0x7;
 407         clksel = SDMMC_CLKSEL_UP_SAMPLE(clksel, sample);
 408
 409         if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS7 ||
 410                 priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU)
 411                 mci_writel(host, CLKSEL64, clksel);
 412         else
 413                 mci_writel(host, CLKSEL, clksel);
 414
 415         return sample;
 416 }
 417
 418 static s8 dw_mci_exynos_get_best_clksmpl(u8 candiates)
 419 {
 420         const u8 iter = 8;
 421         u8 __c;
 422         s8 i, loc = -1;
 423
 424         for (i = 0; i < iter; i++) {
 425                 __c = ror8(candiates, i);
 426                 if ((__c & 0xc7) == 0xc7) {
 427                         loc = i;
 428                         goto out;
 429                 }
 430         }
 431
 432         for (i = 0; i < iter; i++) {
 433                 __c = ror8(candiates, i);
 434                 if ((__c & 0x83) == 0x83) {
 435                         loc = i;
 436                         goto out;
 437                 }
 438         }
 439
 440 out:
 441         return loc;
 442 }
 443
 444 static int dw_mci_exynos_execute_tuning(struct dw_mci_slot *slot, u32 opcode)
 445 {
 446         struct dw_mci *host = slot->host;
 447         struct dw_mci_exynos_priv_data *priv = host->priv;
 448         struct mmc_host *mmc = slot->mmc;
 449         u8 start_smpl, smpl, candiates = 0;
 450         s8 found = -1;
 451         int ret = 0;
 452
 453         start_smpl = dw_mci_exynos_get_clksmpl(host);
 454
 455         do {
 456                 mci_writel(host, TMOUT, ~0);
 457                 smpl = dw_mci_exynos_move_next_clksmpl(host);
 458
 459                 if (!mmc_send_tuning(mmc, opcode, NULL))
 460                         candiates |= (1 << smpl);
 461
 462         } while (start_smpl != smpl);
 463
 464         found = dw_mci_exynos_get_best_clksmpl(candiates);
 465         if (found >= 0) {
 466                 dw_mci_exynos_set_clksmpl(host, found);
 467                 priv->tuned_sample = found;
 468         } else {
 469                 ret = -EIO;
 470         }
 471
 472         return ret;
 473 }
 474
 475 static int dw_mci_exynos_prepare_hs400_tuning(struct dw_mci *host,
 476                                         struct mmc_ios *ios)
 477 {
 478         struct dw_mci_exynos_priv_data *priv = host->priv;
 479
 480         dw_mci_exynos_set_clksel_timing(host, priv->hs400_timing);
 481         dw_mci_exynos_adjust_clock(host, (ios->clock) << 1);
 482
 483         return 0;
 484 }
 485
 486 /* Common capabilities of Exynos4/Exynos5 SoC */
 487 static unsigned long exynos_dwmmc_caps[4] = {
 488         MMC_CAP_1_8V_DDR | MMC_CAP_8_BIT_DATA | MMC_CAP_CMD23,
 489         MMC_CAP_CMD23,
 490         MMC_CAP_CMD23,
 491         MMC_CAP_CMD23,
 492 };
 493
 494 static const struct dw_mci_drv_data exynos_drv_data = {
 495         .caps                   = exynos_dwmmc_caps,
 496         .num_caps               = ARRAY_SIZE(exynos_dwmmc_caps),
 497         .init                   = dw_mci_exynos_priv_init,
 498         .set_ios                = dw_mci_exynos_set_ios,
 499         .parse_dt               = dw_mci_exynos_parse_dt,
 500         .execute_tuning         = dw_mci_exynos_execute_tuning,
 501         .prepare_hs400_tuning   = dw_mci_exynos_prepare_hs400_tuning,
 502 };
 503
 504 static const struct of_device_id dw_mci_exynos_match[] = {
 505         { .compatible = "samsung,exynos4412-dw-mshc",
 506                         .data = &exynos_drv_data, },
 507         { .compatible = "samsung,exynos5250-dw-mshc",
 508                         .data = &exynos_drv_data, },
 509         { .compatible = "samsung,exynos5420-dw-mshc",
 510                         .data = &exynos_drv_data, },
 511         { .compatible = "samsung,exynos5420-dw-mshc-smu",
 512                         .data = &exynos_drv_data, },
 513         { .compatible = "samsung,exynos7-dw-mshc",
 514                         .data = &exynos_drv_data, },
 515         { .compatible = "samsung,exynos7-dw-mshc-smu",
 516                         .data = &exynos_drv_data, },
 517         {},
 518 };
 519 MODULE_DEVICE_TABLE(of, dw_mci_exynos_match);
 520
 521 static int dw_mci_exynos_probe(struct platform_device *pdev)
 522 {
 523         const struct dw_mci_drv_data *drv_data;
 524         const struct of_device_id *match;
 525         int ret;
 526
 527         match = of_match_node(dw_mci_exynos_match, pdev->dev.of_node);
 528         drv_data = match->data;
 529
 530         pm_runtime_get_noresume(&pdev->dev);
 531         pm_runtime_set_active(&pdev->dev);
 532         pm_runtime_enable(&pdev->dev);
 533
 534         ret = dw_mci_pltfm_register(pdev, drv_data);
 535         if (ret) {
 536                 pm_runtime_disable(&pdev->dev);
 537                 pm_runtime_set_suspended(&pdev->dev);
 538                 pm_runtime_put_noidle(&pdev->dev);
 539
 540                 return ret;
 541         }
 542
 543         return 0;
 544 }
 545
 546 static int dw_mci_exynos_remove(struct platform_device *pdev)
 547 {
 548         pm_runtime_disable(&pdev->dev);
 549         pm_runtime_set_suspended(&pdev->dev);
 550         pm_runtime_put_noidle(&pdev->dev);
 551
 552         return dw_mci_pltfm_remove(pdev);
 553 }
 554
 555 static const struct dev_pm_ops dw_mci_exynos_pmops = {
 556         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 557                                 pm_runtime_force_resume)
 558         SET_RUNTIME_PM_OPS(dw_mci_runtime_suspend,
 559                            dw_mci_exynos_runtime_resume,
 560                            NULL)
 561         .resume_noirq = dw_mci_exynos_resume_noirq,
 562         .thaw_noirq = dw_mci_exynos_resume_noirq,
 563         .restore_noirq = dw_mci_exynos_resume_noirq,
 564 };
 565
 566 static struct platform_driver dw_mci_exynos_pltfm_driver = {
 567         .probe          = dw_mci_exynos_probe,
 568         .remove         = dw_mci_exynos_remove,
 569         .driver         = {
 570                 .name           = "dwmmc_exynos",
 571                 .of_match_table = dw_mci_exynos_match,
 572                 .pm             = &dw_mci_exynos_pmops,
 573         },
 574 };
 575
 576 module_platform_driver(dw_mci_exynos_pltfm_driver);
 577
 578 MODULE_DESCRIPTION("Samsung Specific DW-MSHC Driver Extension");
 579 MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com");
 580 MODULE_LICENSE("GPL v2");
 581 MODULE_ALIAS("platform:dwmmc_exynos");