drivers/mmc/host/sdhci-of-esdhc.c

   1 /*
   2  * Freescale eSDHC controller driver.
   3  *
   4  * Copyright (c) 2007, 2010, 2012 Freescale Semiconductor, Inc.
   5  * Copyright (c) 2009 MontaVista Software, Inc.
   6  *
   7  * Authors: Xiaobo Xie <X.Xie@freescale.com>
   8  *          Anton Vorontsov <avorontsov@ru.mvista.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or (at
  13  * your option) any later version.
  14  */
  15
  16 #include <linux/err.h>
  17 #include <linux/io.h>
  18 #include <linux/of.h>
  19 #include <linux/delay.h>
  20 #include <linux/module.h>
  21 #include <linux/mmc/host.h>
  22 #include "sdhci-pltfm.h"
  23 #include "sdhci-esdhc.h"
  24
  25 #define VENDOR_V_22     0x12
  26 #define VENDOR_V_23     0x13
  27
  28 struct sdhci_esdhc {
  29         u8 vendor_ver;
  30         u8 spec_ver;
  31 };
  32
  33 /**
  34  * esdhc_read*_fixup - Fixup the value read from incompatible eSDHC register
  35  *                     to make it compatible with SD spec.
  36  *
  37  * @host: pointer to sdhci_host
  38  * @spec_reg: SD spec register address
  39  * @value: 32bit eSDHC register value on spec_reg address
  40  *
  41  * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
  42  * registers are 32 bits. There are differences in register size, register
  43  * address, register function, bit position and function between eSDHC spec
  44  * and SD spec.
  45  *
  46  * Return a fixed up register value
  47  */
  48 static u32 esdhc_readl_fixup(struct sdhci_host *host,
  49                                      int spec_reg, u32 value)
  50 {
  51         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
  52         struct sdhci_esdhc *esdhc = pltfm_host->priv;
  53         u32 ret;
  54
  55         /*
  56          * The bit of ADMA flag in eSDHC is not compatible with standard
  57          * SDHC register, so set fake flag SDHCI_CAN_DO_ADMA2 when ADMA is
  58          * supported by eSDHC.
  59          * And for many FSL eSDHC controller, the reset value of field
  60          * SDHCI_CAN_DO_ADMA1 is 1, but some of them can't support ADMA,
  61          * only these vendor version is greater than 2.2/0x12 support ADMA.
  62          */
  63         if ((spec_reg == SDHCI_CAPABILITIES) && (value & SDHCI_CAN_DO_ADMA1)) {
  64                 if (esdhc->vendor_ver > VENDOR_V_22) {
  65                         ret = value | SDHCI_CAN_DO_ADMA2;
  66                         return ret;
  67                 }
  68         }
  69         ret = value;
  70         return ret;
  71 }
  72
  73 static u16 esdhc_readw_fixup(struct sdhci_host *host,
  74                                      int spec_reg, u32 value)
  75 {
  76         u16 ret;
  77         int shift = (spec_reg & 0x2) * 8;
  78
  79         if (spec_reg == SDHCI_HOST_VERSION)
  80                 ret = value & 0xffff;
  81         else
  82                 ret = (value >> shift) & 0xffff;
  83         return ret;
  84 }
  85
  86 static u8 esdhc_readb_fixup(struct sdhci_host *host,
  87                                      int spec_reg, u32 value)
  88 {
  89         u8 ret;
  90         u8 dma_bits;
  91         int shift = (spec_reg & 0x3) * 8;
  92
  93         ret = (value >> shift) & 0xff;
  94
  95         /*
  96          * "DMA select" locates at offset 0x28 in SD specification, but on
  97          * P5020 or P3041, it locates at 0x29.
  98          */
  99         if (spec_reg == SDHCI_HOST_CONTROL) {
 100                 /* DMA select is 22,23 bits in Protocol Control Register */
 101                 dma_bits = (value >> 5) & SDHCI_CTRL_DMA_MASK;
 102                 /* fixup the result */
 103                 ret &= ~SDHCI_CTRL_DMA_MASK;
 104                 ret |= dma_bits;
 105         }
 106         return ret;
 107 }
 108
 109 /**
 110  * esdhc_write*_fixup - Fixup the SD spec register value so that it could be
 111  *                      written into eSDHC register.
 112  *
 113  * @host: pointer to sdhci_host
 114  * @spec_reg: SD spec register address
 115  * @value: 8/16/32bit SD spec register value that would be written
 116  * @old_value: 32bit eSDHC register value on spec_reg address
 117  *
 118  * In SD spec, there are 8/16/32/64 bits registers, while all of eSDHC
 119  * registers are 32 bits. There are differences in register size, register
 120  * address, register function, bit position and function between eSDHC spec
 121  * and SD spec.
 122  *
 123  * Return a fixed up register value
 124  */
 125 static u32 esdhc_writel_fixup(struct sdhci_host *host,
 126                                      int spec_reg, u32 value, u32 old_value)
 127 {
 128         u32 ret;
 129
 130         /*
 131          * Enabling IRQSTATEN[BGESEN] is just to set IRQSTAT[BGE]
 132          * when SYSCTL[RSTD] is set for some special operations.
 133          * No any impact on other operation.
 134          */
 135         if (spec_reg == SDHCI_INT_ENABLE)
 136                 ret = value | SDHCI_INT_BLK_GAP;
 137         else
 138                 ret = value;
 139
 140         return ret;
 141 }
 142
 143 static u32 esdhc_writew_fixup(struct sdhci_host *host,
 144                                      int spec_reg, u16 value, u32 old_value)
 145 {
 146         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 147         int shift = (spec_reg & 0x2) * 8;
 148         u32 ret;
 149
 150         switch (spec_reg) {
 151         case SDHCI_TRANSFER_MODE:
 152                 /*
 153                  * Postpone this write, we must do it together with a
 154                  * command write that is down below. Return old value.
 155                  */
 156                 pltfm_host->xfer_mode_shadow = value;
 157                 return old_value;
 158         case SDHCI_COMMAND:
 159                 ret = (value << 16) | pltfm_host->xfer_mode_shadow;
 160                 return ret;
 161         }
 162
 163         ret = old_value & (~(0xffff << shift));
 164         ret |= (value << shift);
 165
 166         if (spec_reg == SDHCI_BLOCK_SIZE) {
 167                 /*
 168                  * Two last DMA bits are reserved, and first one is used for
 169                  * non-standard blksz of 4096 bytes that we don't support
 170                  * yet. So clear the DMA boundary bits.
 171                  */
 172                 ret &= (~SDHCI_MAKE_BLKSZ(0x7, 0));
 173         }
 174         return ret;
 175 }
 176
 177 static u32 esdhc_writeb_fixup(struct sdhci_host *host,
 178                                      int spec_reg, u8 value, u32 old_value)
 179 {
 180         u32 ret;
 181         u32 dma_bits;
 182         u8 tmp;
 183         int shift = (spec_reg & 0x3) * 8;
 184
 185         /*
 186          * eSDHC doesn't have a standard power control register, so we do
 187          * nothing here to avoid incorrect operation.
 188          */
 189         if (spec_reg == SDHCI_POWER_CONTROL)
 190                 return old_value;
 191         /*
 192          * "DMA select" location is offset 0x28 in SD specification, but on
 193          * P5020 or P3041, it's located at 0x29.
 194          */
 195         if (spec_reg == SDHCI_HOST_CONTROL) {
 196                 /*
 197                  * If host control register is not standard, exit
 198                  * this function
 199                  */
 200                 if (host->quirks2 & SDHCI_QUIRK2_BROKEN_HOST_CONTROL)
 201                         return old_value;
 202
 203                 /* DMA select is 22,23 bits in Protocol Control Register */
 204                 dma_bits = (value & SDHCI_CTRL_DMA_MASK) << 5;
 205                 ret = (old_value & (~(SDHCI_CTRL_DMA_MASK << 5))) | dma_bits;
 206                 tmp = (value & (~SDHCI_CTRL_DMA_MASK)) |
 207                       (old_value & SDHCI_CTRL_DMA_MASK);
 208                 ret = (ret & (~0xff)) | tmp;
 209
 210                 /* Prevent SDHCI core from writing reserved bits (e.g. HISPD) */
 211                 ret &= ~ESDHC_HOST_CONTROL_RES;
 212                 return ret;
 213         }
 214
 215         ret = (old_value & (~(0xff << shift))) | (value << shift);
 216         return ret;
 217 }
 218
 219 static u32 esdhc_be_readl(struct sdhci_host *host, int reg)
 220 {
 221         u32 ret;
 222         u32 value;
 223
 224         value = ioread32be(host->ioaddr + reg);
 225         ret = esdhc_readl_fixup(host, reg, value);
 226
 227         return ret;
 228 }
 229
 230 static u32 esdhc_le_readl(struct sdhci_host *host, int reg)
 231 {
 232         u32 ret;
 233         u32 value;
 234
 235         value = ioread32(host->ioaddr + reg);
 236         ret = esdhc_readl_fixup(host, reg, value);
 237
 238         return ret;
 239 }
 240
 241 static u16 esdhc_be_readw(struct sdhci_host *host, int reg)
 242 {
 243         u16 ret;
 244         u32 value;
 245         int base = reg & ~0x3;
 246
 247         value = ioread32be(host->ioaddr + base);
 248         ret = esdhc_readw_fixup(host, reg, value);
 249         return ret;
 250 }
 251
 252 static u16 esdhc_le_readw(struct sdhci_host *host, int reg)
 253 {
 254         u16 ret;
 255         u32 value;
 256         int base = reg & ~0x3;
 257
 258         value = ioread32(host->ioaddr + base);
 259         ret = esdhc_readw_fixup(host, reg, value);
 260         return ret;
 261 }
 262
 263 static u8 esdhc_be_readb(struct sdhci_host *host, int reg)
 264 {
 265         u8 ret;
 266         u32 value;
 267         int base = reg & ~0x3;
 268
 269         value = ioread32be(host->ioaddr + base);
 270         ret = esdhc_readb_fixup(host, reg, value);
 271         return ret;
 272 }
 273
 274 static u8 esdhc_le_readb(struct sdhci_host *host, int reg)
 275 {
 276         u8 ret;
 277         u32 value;
 278         int base = reg & ~0x3;
 279
 280         value = ioread32(host->ioaddr + base);
 281         ret = esdhc_readb_fixup(host, reg, value);
 282         return ret;
 283 }
 284
 285 static void esdhc_be_writel(struct sdhci_host *host, u32 val, int reg)
 286 {
 287         u32 value;
 288
 289         value = esdhc_writel_fixup(host, reg, val, 0);
 290         iowrite32be(value, host->ioaddr + reg);
 291 }
 292
 293 static void esdhc_le_writel(struct sdhci_host *host, u32 val, int reg)
 294 {
 295         u32 value;
 296
 297         value = esdhc_writel_fixup(host, reg, val, 0);
 298         iowrite32(value, host->ioaddr + reg);
 299 }
 300
 301 static void esdhc_be_writew(struct sdhci_host *host, u16 val, int reg)
 302 {
 303         int base = reg & ~0x3;
 304         u32 value;
 305         u32 ret;
 306
 307         value = ioread32be(host->ioaddr + base);
 308         ret = esdhc_writew_fixup(host, reg, val, value);
 309         if (reg != SDHCI_TRANSFER_MODE)
 310                 iowrite32be(ret, host->ioaddr + base);
 311 }
 312
 313 static void esdhc_le_writew(struct sdhci_host *host, u16 val, int reg)
 314 {
 315         int base = reg & ~0x3;
 316         u32 value;
 317         u32 ret;
 318
 319         value = ioread32(host->ioaddr + base);
 320         ret = esdhc_writew_fixup(host, reg, val, value);
 321         if (reg != SDHCI_TRANSFER_MODE)
 322                 iowrite32(ret, host->ioaddr + base);
 323 }
 324
 325 static void esdhc_be_writeb(struct sdhci_host *host, u8 val, int reg)
 326 {
 327         int base = reg & ~0x3;
 328         u32 value;
 329         u32 ret;
 330
 331         value = ioread32be(host->ioaddr + base);
 332         ret = esdhc_writeb_fixup(host, reg, val, value);
 333         iowrite32be(ret, host->ioaddr + base);
 334 }
 335
 336 static void esdhc_le_writeb(struct sdhci_host *host, u8 val, int reg)
 337 {
 338         int base = reg & ~0x3;
 339         u32 value;
 340         u32 ret;
 341
 342         value = ioread32(host->ioaddr + base);
 343         ret = esdhc_writeb_fixup(host, reg, val, value);
 344         iowrite32(ret, host->ioaddr + base);
 345 }
 346
 347 /*
 348  * For Abort or Suspend after Stop at Block Gap, ignore the ADMA
 349  * error(IRQSTAT[ADMAE]) if both Transfer Complete(IRQSTAT[TC])
 350  * and Block Gap Event(IRQSTAT[BGE]) are also set.
 351  * For Continue, apply soft reset for data(SYSCTL[RSTD]);
 352  * and re-issue the entire read transaction from beginning.
 353  */
 354 static void esdhc_of_adma_workaround(struct sdhci_host *host, u32 intmask)
 355 {
 356         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 357         struct sdhci_esdhc *esdhc = pltfm_host->priv;
 358         bool applicable;
 359         dma_addr_t dmastart;
 360         dma_addr_t dmanow;
 361
 362         applicable = (intmask & SDHCI_INT_DATA_END) &&
 363                      (intmask & SDHCI_INT_BLK_GAP) &&
 364                      (esdhc->vendor_ver == VENDOR_V_23);
 365         if (!applicable)
 366                 return;
 367
 368         host->data->error = 0;
 369         dmastart = sg_dma_address(host->data->sg);
 370         dmanow = dmastart + host->data->bytes_xfered;
 371         /*
 372          * Force update to the next DMA block boundary.
 373          */
 374         dmanow = (dmanow & ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1)) +
 375                 SDHCI_DEFAULT_BOUNDARY_SIZE;
 376         host->data->bytes_xfered = dmanow - dmastart;
 377         sdhci_writel(host, dmanow, SDHCI_DMA_ADDRESS);
 378 }
 379
 380 static int esdhc_of_enable_dma(struct sdhci_host *host)
 381 {
 382         u32 value;
 383
 384         value = sdhci_readl(host, ESDHC_DMA_SYSCTL);
 385         value |= ESDHC_DMA_SNOOP;
 386         sdhci_writel(host, value, ESDHC_DMA_SYSCTL);
 387         return 0;
 388 }
 389
 390 static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
 391 {
 392         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 393
 394         return pltfm_host->clock;
 395 }
 396
 397 static unsigned int esdhc_of_get_min_clock(struct sdhci_host *host)
 398 {
 399         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 400
 401         return pltfm_host->clock / 256 / 16;
 402 }
 403
 404 static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
 405 {
 406         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 407         struct sdhci_esdhc *esdhc = pltfm_host->priv;
 408         int pre_div = 1;
 409         int div = 1;
 410         u32 temp;
 411
 412         host->mmc->actual_clock = 0;
 413
 414         if (clock == 0)
 415                 return;
 416
 417         /* Workaround to start pre_div at 2 for VNN < VENDOR_V_23 */
 418         if (esdhc->vendor_ver < VENDOR_V_23)
 419                 pre_div = 2;
 420
 421         /* Workaround to reduce the clock frequency for p1010 esdhc */
 422         if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) {
 423                 if (clock > 20000000)
 424                         clock -= 5000000;
 425                 if (clock > 40000000)
 426                         clock -= 5000000;
 427         }
 428
 429         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 430         temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 431                 | ESDHC_CLOCK_MASK);
 432         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 433
 434         while (host->max_clk / pre_div / 16 > clock && pre_div < 256)
 435                 pre_div *= 2;
 436
 437         while (host->max_clk / pre_div / div > clock && div < 16)
 438                 div++;
 439
 440         dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
 441                 clock, host->max_clk / pre_div / div);
 442         host->mmc->actual_clock = host->max_clk / pre_div / div;
 443         pre_div >>= 1;
 444         div--;
 445
 446         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 447         temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 448                 | (div << ESDHC_DIVIDER_SHIFT)
 449                 | (pre_div << ESDHC_PREDIV_SHIFT));
 450         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 451         mdelay(1);
 452 }
 453
 454 static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
 455 {
 456         u32 ctrl;
 457
 458         ctrl = sdhci_readl(host, ESDHC_PROCTL);
 459         ctrl &= (~ESDHC_CTRL_BUSWIDTH_MASK);
 460         switch (width) {
 461         case MMC_BUS_WIDTH_8:
 462                 ctrl |= ESDHC_CTRL_8BITBUS;
 463                 break;
 464
 465         case MMC_BUS_WIDTH_4:
 466                 ctrl |= ESDHC_CTRL_4BITBUS;
 467                 break;
 468
 469         default:
 470                 break;
 471         }
 472
 473         sdhci_writel(host, ctrl, ESDHC_PROCTL);
 474 }
 475
 476 static void esdhc_reset(struct sdhci_host *host, u8 mask)
 477 {
 478         sdhci_reset(host, mask);
 479
 480         sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
 481         sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
 482 }
 483
 484 #ifdef CONFIG_PM
 485 static u32 esdhc_proctl;
 486 static int esdhc_of_suspend(struct device *dev)
 487 {
 488         struct sdhci_host *host = dev_get_drvdata(dev);
 489
 490         esdhc_proctl = sdhci_readl(host, SDHCI_HOST_CONTROL);
 491
 492         return sdhci_suspend_host(host);
 493 }
 494
 495 static int esdhc_of_resume(struct device *dev)
 496 {
 497         struct sdhci_host *host = dev_get_drvdata(dev);
 498         int ret = sdhci_resume_host(host);
 499
 500         if (ret == 0) {
 501                 /* Isn't this already done by sdhci_resume_host() ? --rmk */
 502                 esdhc_of_enable_dma(host);
 503                 sdhci_writel(host, esdhc_proctl, SDHCI_HOST_CONTROL);
 504         }
 505         return ret;
 506 }
 507
 508 static const struct dev_pm_ops esdhc_pmops = {
 509         .suspend        = esdhc_of_suspend,
 510         .resume         = esdhc_of_resume,
 511 };
 512 #define ESDHC_PMOPS (&esdhc_pmops)
 513 #else
 514 #define ESDHC_PMOPS NULL
 515 #endif
 516
 517 static const struct sdhci_ops sdhci_esdhc_be_ops = {
 518         .read_l = esdhc_be_readl,
 519         .read_w = esdhc_be_readw,
 520         .read_b = esdhc_be_readb,
 521         .write_l = esdhc_be_writel,
 522         .write_w = esdhc_be_writew,
 523         .write_b = esdhc_be_writeb,
 524         .set_clock = esdhc_of_set_clock,
 525         .enable_dma = esdhc_of_enable_dma,
 526         .get_max_clock = esdhc_of_get_max_clock,
 527         .get_min_clock = esdhc_of_get_min_clock,
 528         .adma_workaround = esdhc_of_adma_workaround,
 529         .set_bus_width = esdhc_pltfm_set_bus_width,
 530         .reset = esdhc_reset,
 531         .set_uhs_signaling = sdhci_set_uhs_signaling,
 532 };
 533
 534 static const struct sdhci_ops sdhci_esdhc_le_ops = {
 535         .read_l = esdhc_le_readl,
 536         .read_w = esdhc_le_readw,
 537         .read_b = esdhc_le_readb,
 538         .write_l = esdhc_le_writel,
 539         .write_w = esdhc_le_writew,
 540         .write_b = esdhc_le_writeb,
 541         .set_clock = esdhc_of_set_clock,
 542         .enable_dma = esdhc_of_enable_dma,
 543         .get_max_clock = esdhc_of_get_max_clock,
 544         .get_min_clock = esdhc_of_get_min_clock,
 545         .adma_workaround = esdhc_of_adma_workaround,
 546         .set_bus_width = esdhc_pltfm_set_bus_width,
 547         .reset = esdhc_reset,
 548         .set_uhs_signaling = sdhci_set_uhs_signaling,
 549 };
 550
 551 static const struct sdhci_pltfm_data sdhci_esdhc_be_pdata = {
 552         .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
 553                 | SDHCI_QUIRK_NO_CARD_NO_RESET
 554                 | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 555         .ops = &sdhci_esdhc_be_ops,
 556 };
 557
 558 static const struct sdhci_pltfm_data sdhci_esdhc_le_pdata = {
 559         .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_BROKEN_CARD_DETECTION
 560                 | SDHCI_QUIRK_NO_CARD_NO_RESET
 561                 | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
 562         .ops = &sdhci_esdhc_le_ops,
 563 };
 564
 565 static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
 566 {
 567         struct sdhci_pltfm_host *pltfm_host;
 568         struct sdhci_esdhc *esdhc;
 569         u16 host_ver;
 570
 571         pltfm_host = sdhci_priv(host);
 572         esdhc = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_esdhc),
 573                              GFP_KERNEL);
 574
 575         host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
 576         esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
 577                              SDHCI_VENDOR_VER_SHIFT;
 578         esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK;
 579
 580         pltfm_host->priv = esdhc;
 581 }
 582
 583 static int sdhci_esdhc_probe(struct platform_device *pdev)
 584 {
 585         struct sdhci_host *host;
 586         struct device_node *np;
 587         int ret;
 588
 589         np = pdev->dev.of_node;
 590
 591         if (of_get_property(np, "little-endian", NULL))
 592                 host = sdhci_pltfm_init(pdev, &sdhci_esdhc_le_pdata, 0);
 593         else
 594                 host = sdhci_pltfm_init(pdev, &sdhci_esdhc_be_pdata, 0);
 595
 596         if (IS_ERR(host))
 597                 return PTR_ERR(host);
 598
 599         esdhc_init(pdev, host);
 600
 601         sdhci_get_of_property(pdev);
 602
 603         if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
 604             of_device_is_compatible(np, "fsl,p5020-esdhc") ||
 605             of_device_is_compatible(np, "fsl,p4080-esdhc") ||
 606             of_device_is_compatible(np, "fsl,p1020-esdhc") ||
 607             of_device_is_compatible(np, "fsl,t1040-esdhc") ||
 608             of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
 609                 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
 610
 611         if (of_device_is_compatible(np, "fsl,ls1021a-esdhc"))
 612                 host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 613
 614         if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
 615                 /*
 616                  * Freescale messed up with P2020 as it has a non-standard
 617                  * host control register
 618                  */
 619                 host->quirks2 |= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
 620         }
 621
 622         /* call to generic mmc_of_parse to support additional capabilities */
 623         ret = mmc_of_parse(host->mmc);
 624         if (ret)
 625                 goto err;
 626
 627         mmc_of_parse_voltage(np, &host->ocr_mask);
 628
 629         ret = sdhci_add_host(host);
 630         if (ret)
 631                 goto err;
 632
 633         return 0;
 634  err:
 635         sdhci_pltfm_free(pdev);
 636         return ret;
 637 }
 638
 639 static const struct of_device_id sdhci_esdhc_of_match[] = {
 640         { .compatible = "fsl,mpc8379-esdhc" },
 641         { .compatible = "fsl,mpc8536-esdhc" },
 642         { .compatible = "fsl,esdhc" },
 643         { }
 644 };
 645 MODULE_DEVICE_TABLE(of, sdhci_esdhc_of_match);
 646
 647 static struct platform_driver sdhci_esdhc_driver = {
 648         .driver = {
 649                 .name = "sdhci-esdhc",
 650                 .of_match_table = sdhci_esdhc_of_match,
 651                 .pm = ESDHC_PMOPS,
 652         },
 653         .probe = sdhci_esdhc_probe,
 654         .remove = sdhci_pltfm_unregister,
 655 };
 656
 657 module_platform_driver(sdhci_esdhc_driver);
 658
 659 MODULE_DESCRIPTION("SDHCI OF driver for Freescale MPC eSDHC");
 660 MODULE_AUTHOR("Xiaobo Xie <X.Xie@freescale.com>, "
 661               "Anton Vorontsov <avorontsov@ru.mvista.com>");
 662 MODULE_LICENSE("GPL v2");