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

   1 /*
   2  * Freescale eSDHC i.MX controller driver for the platform bus.
   3  *
   4  * derived from the OF-version.
   5  *
   6  * Copyright (c) 2010 Pengutronix e.K.
   7  *   Author: Wolfram Sang <kernel@pengutronix.de>
   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 as published by
  11  * the Free Software Foundation; either version 2 of the License.
  12  */
  13
  14 #include <linux/io.h>
  15 #include <linux/delay.h>
  16 #include <linux/err.h>
  17 #include <linux/clk.h>
  18 #include <linux/gpio.h>
  19 #include <linux/module.h>
  20 #include <linux/slab.h>
  21 #include <linux/mmc/host.h>
  22 #include <linux/mmc/mmc.h>
  23 #include <linux/mmc/sdio.h>
  24 #include <linux/mmc/slot-gpio.h>
  25 #include <linux/of.h>
  26 #include <linux/of_device.h>
  27 #include <linux/of_gpio.h>
  28 #include <linux/pinctrl/consumer.h>
  29 #include <linux/platform_data/mmc-esdhc-imx.h>
  30 #include <linux/pm_runtime.h>
  31 #include "sdhci-pltfm.h"
  32 #include "sdhci-esdhc.h"
  33
  34 #define ESDHC_CTRL_D3CD                 0x08
  35 /* VENDOR SPEC register */
  36 #define ESDHC_VENDOR_SPEC               0xc0
  37 #define  ESDHC_VENDOR_SPEC_SDIO_QUIRK   (1 << 1)
  38 #define  ESDHC_VENDOR_SPEC_VSELECT      (1 << 1)
  39 #define  ESDHC_VENDOR_SPEC_FRC_SDCLK_ON (1 << 8)
  40 #define ESDHC_WTMK_LVL                  0x44
  41 #define ESDHC_MIX_CTRL                  0x48
  42 #define  ESDHC_MIX_CTRL_DDREN           (1 << 3)
  43 #define  ESDHC_MIX_CTRL_AC23EN          (1 << 7)
  44 #define  ESDHC_MIX_CTRL_EXE_TUNE        (1 << 22)
  45 #define  ESDHC_MIX_CTRL_SMPCLK_SEL      (1 << 23)
  46 #define  ESDHC_MIX_CTRL_FBCLK_SEL       (1 << 25)
  47 /* Bits 3 and 6 are not SDHCI standard definitions */
  48 #define  ESDHC_MIX_CTRL_SDHCI_MASK      0xb7
  49 /* Tuning bits */
  50 #define  ESDHC_MIX_CTRL_TUNING_MASK     0x03c00000
  51
  52 /* dll control register */
  53 #define ESDHC_DLL_CTRL                  0x60
  54 #define ESDHC_DLL_OVERRIDE_VAL_SHIFT    9
  55 #define ESDHC_DLL_OVERRIDE_EN_SHIFT     8
  56
  57 /* tune control register */
  58 #define ESDHC_TUNE_CTRL_STATUS          0x68
  59 #define  ESDHC_TUNE_CTRL_STEP           1
  60 #define  ESDHC_TUNE_CTRL_MIN            0
  61 #define  ESDHC_TUNE_CTRL_MAX            ((1 << 7) - 1)
  62
  63 #define ESDHC_TUNING_CTRL               0xcc
  64 #define ESDHC_STD_TUNING_EN             (1 << 24)
  65 /* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
  66 #define ESDHC_TUNING_START_TAP          0x1
  67
  68 /* pinctrl state */
  69 #define ESDHC_PINCTRL_STATE_100MHZ      "state_100mhz"
  70 #define ESDHC_PINCTRL_STATE_200MHZ      "state_200mhz"
  71
  72 /*
  73  * Our interpretation of the SDHCI_HOST_CONTROL register
  74  */
  75 #define ESDHC_CTRL_4BITBUS              (0x1 << 1)
  76 #define ESDHC_CTRL_8BITBUS              (0x2 << 1)
  77 #define ESDHC_CTRL_BUSWIDTH_MASK        (0x3 << 1)
  78
  79 /*
  80  * There is an INT DMA ERR mis-match between eSDHC and STD SDHC SPEC:
  81  * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design,
  82  * but bit28 is used as the INT DMA ERR in fsl eSDHC design.
  83  * Define this macro DMA error INT for fsl eSDHC
  84  */
  85 #define ESDHC_INT_VENDOR_SPEC_DMA_ERR   (1 << 28)
  86
  87 /*
  88  * The CMDTYPE of the CMD register (offset 0xE) should be set to
  89  * "11" when the STOP CMD12 is issued on imx53 to abort one
  90  * open ended multi-blk IO. Otherwise the TC INT wouldn't
  91  * be generated.
  92  * In exact block transfer, the controller doesn't complete the
  93  * operations automatically as required at the end of the
  94  * transfer and remains on hold if the abort command is not sent.
  95  * As a result, the TC flag is not asserted and SW  received timeout
  96  * exeception. Bit1 of Vendor Spec registor is used to fix it.
  97  */
  98 #define ESDHC_FLAG_MULTIBLK_NO_INT      BIT(1)
  99 /*
 100  * The flag enables the workaround for ESDHC errata ENGcm07207 which
 101  * affects i.MX25 and i.MX35.
 102  */
 103 #define ESDHC_FLAG_ENGCM07207           BIT(2)
 104 /*
 105  * The flag tells that the ESDHC controller is an USDHC block that is
 106  * integrated on the i.MX6 series.
 107  */
 108 #define ESDHC_FLAG_USDHC                BIT(3)
 109 /* The IP supports manual tuning process */
 110 #define ESDHC_FLAG_MAN_TUNING           BIT(4)
 111 /* The IP supports standard tuning process */
 112 #define ESDHC_FLAG_STD_TUNING           BIT(5)
 113 /* The IP has SDHCI_CAPABILITIES_1 register */
 114 #define ESDHC_FLAG_HAVE_CAP1            BIT(6)
 115 /*
 116  * The IP has errata ERR004536
 117  * uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow,
 118  * when reading data from the card
 119  */
 120 #define ESDHC_FLAG_ERR004536            BIT(7)
 121 /* The IP supports HS200 mode */
 122 #define ESDHC_FLAG_HS200                BIT(8)
 123
 124 struct esdhc_soc_data {
 125         u32 flags;
 126 };
 127
 128 static struct esdhc_soc_data esdhc_imx25_data = {
 129         .flags = ESDHC_FLAG_ENGCM07207,
 130 };
 131
 132 static struct esdhc_soc_data esdhc_imx35_data = {
 133         .flags = ESDHC_FLAG_ENGCM07207,
 134 };
 135
 136 static struct esdhc_soc_data esdhc_imx51_data = {
 137         .flags = 0,
 138 };
 139
 140 static struct esdhc_soc_data esdhc_imx53_data = {
 141         .flags = ESDHC_FLAG_MULTIBLK_NO_INT,
 142 };
 143
 144 static struct esdhc_soc_data usdhc_imx6q_data = {
 145         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING,
 146 };
 147
 148 static struct esdhc_soc_data usdhc_imx6sl_data = {
 149         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 150                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536
 151                         | ESDHC_FLAG_HS200,
 152 };
 153
 154 static struct esdhc_soc_data usdhc_imx6sx_data = {
 155         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 156                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200,
 157 };
 158
 159 struct pltfm_imx_data {
 160         u32 scratchpad;
 161         struct pinctrl *pinctrl;
 162         struct pinctrl_state *pins_default;
 163         struct pinctrl_state *pins_100mhz;
 164         struct pinctrl_state *pins_200mhz;
 165         const struct esdhc_soc_data *socdata;
 166         struct esdhc_platform_data boarddata;
 167         struct clk *clk_ipg;
 168         struct clk *clk_ahb;
 169         struct clk *clk_per;
 170         enum {
 171                 NO_CMD_PENDING,      /* no multiblock command pending*/
 172                 MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */
 173                 WAIT_FOR_INT,        /* sent CMD12, waiting for response INT */
 174         } multiblock_status;
 175         u32 is_ddr;
 176 };
 177
 178 static const struct platform_device_id imx_esdhc_devtype[] = {
 179         {
 180                 .name = "sdhci-esdhc-imx25",
 181                 .driver_data = (kernel_ulong_t) &esdhc_imx25_data,
 182         }, {
 183                 .name = "sdhci-esdhc-imx35",
 184                 .driver_data = (kernel_ulong_t) &esdhc_imx35_data,
 185         }, {
 186                 .name = "sdhci-esdhc-imx51",
 187                 .driver_data = (kernel_ulong_t) &esdhc_imx51_data,
 188         }, {
 189                 /* sentinel */
 190         }
 191 };
 192 MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype);
 193
 194 static const struct of_device_id imx_esdhc_dt_ids[] = {
 195         { .compatible = "fsl,imx25-esdhc", .data = &esdhc_imx25_data, },
 196         { .compatible = "fsl,imx35-esdhc", .data = &esdhc_imx35_data, },
 197         { .compatible = "fsl,imx51-esdhc", .data = &esdhc_imx51_data, },
 198         { .compatible = "fsl,imx53-esdhc", .data = &esdhc_imx53_data, },
 199         { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, },
 200         { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, },
 201         { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
 202         { /* sentinel */ }
 203 };
 204 MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
 205
 206 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
 207 {
 208         return data->socdata == &esdhc_imx25_data;
 209 }
 210
 211 static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
 212 {
 213         return data->socdata == &esdhc_imx53_data;
 214 }
 215
 216 static inline int is_imx6q_usdhc(struct pltfm_imx_data *data)
 217 {
 218         return data->socdata == &usdhc_imx6q_data;
 219 }
 220
 221 static inline int esdhc_is_usdhc(struct pltfm_imx_data *data)
 222 {
 223         return !!(data->socdata->flags & ESDHC_FLAG_USDHC);
 224 }
 225
 226 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
 227 {
 228         void __iomem *base = host->ioaddr + (reg & ~0x3);
 229         u32 shift = (reg & 0x3) * 8;
 230
 231         writel(((readl(base) & ~(mask << shift)) | (val << shift)), base);
 232 }
 233
 234 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 235 {
 236         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 237         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 238         u32 val = readl(host->ioaddr + reg);
 239
 240         if (unlikely(reg == SDHCI_PRESENT_STATE)) {
 241                 u32 fsl_prss = val;
 242                 /* save the least 20 bits */
 243                 val = fsl_prss & 0x000FFFFF;
 244                 /* move dat[0-3] bits */
 245                 val |= (fsl_prss & 0x0F000000) >> 4;
 246                 /* move cmd line bit */
 247                 val |= (fsl_prss & 0x00800000) << 1;
 248         }
 249
 250         if (unlikely(reg == SDHCI_CAPABILITIES)) {
 251                 /* ignore bit[0-15] as it stores cap_1 register val for mx6sl */
 252                 if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
 253                         val &= 0xffff0000;
 254
 255                 /* In FSL esdhc IC module, only bit20 is used to indicate the
 256                  * ADMA2 capability of esdhc, but this bit is messed up on
 257                  * some SOCs (e.g. on MX25, MX35 this bit is set, but they
 258                  * don't actually support ADMA2). So set the BROKEN_ADMA
 259                  * uirk on MX25/35 platforms.
 260                  */
 261
 262                 if (val & SDHCI_CAN_DO_ADMA1) {
 263                         val &= ~SDHCI_CAN_DO_ADMA1;
 264                         val |= SDHCI_CAN_DO_ADMA2;
 265                 }
 266         }
 267
 268         if (unlikely(reg == SDHCI_CAPABILITIES_1)) {
 269                 if (esdhc_is_usdhc(imx_data)) {
 270                         if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
 271                                 val = readl(host->ioaddr + SDHCI_CAPABILITIES) & 0xFFFF;
 272                         else
 273                                 /* imx6q/dl does not have cap_1 register, fake one */
 274                                 val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104
 275                                         | SDHCI_SUPPORT_SDR50
 276                                         | SDHCI_USE_SDR50_TUNING;
 277                 }
 278         }
 279
 280         if (unlikely(reg == SDHCI_MAX_CURRENT) && esdhc_is_usdhc(imx_data)) {
 281                 val = 0;
 282                 val |= 0xFF << SDHCI_MAX_CURRENT_330_SHIFT;
 283                 val |= 0xFF << SDHCI_MAX_CURRENT_300_SHIFT;
 284                 val |= 0xFF << SDHCI_MAX_CURRENT_180_SHIFT;
 285         }
 286
 287         if (unlikely(reg == SDHCI_INT_STATUS)) {
 288                 if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) {
 289                         val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR;
 290                         val |= SDHCI_INT_ADMA_ERROR;
 291                 }
 292
 293                 /*
 294                  * mask off the interrupt we get in response to the manually
 295                  * sent CMD12
 296                  */
 297                 if ((imx_data->multiblock_status == WAIT_FOR_INT) &&
 298                     ((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) {
 299                         val &= ~SDHCI_INT_RESPONSE;
 300                         writel(SDHCI_INT_RESPONSE, host->ioaddr +
 301                                                    SDHCI_INT_STATUS);
 302                         imx_data->multiblock_status = NO_CMD_PENDING;
 303                 }
 304         }
 305
 306         return val;
 307 }
 308
 309 static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 310 {
 311         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 312         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 313         u32 data;
 314
 315         if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE)) {
 316                 if ((val & SDHCI_INT_CARD_INT) && !esdhc_is_usdhc(imx_data)) {
 317                         /*
 318                          * Clear and then set D3CD bit to avoid missing the
 319                          * card interrupt.  This is a eSDHC controller problem
 320                          * so we need to apply the following workaround: clear
 321                          * and set D3CD bit will make eSDHC re-sample the card
 322                          * interrupt. In case a card interrupt was lost,
 323                          * re-sample it by the following steps.
 324                          */
 325                         data = readl(host->ioaddr + SDHCI_HOST_CONTROL);
 326                         data &= ~ESDHC_CTRL_D3CD;
 327                         writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
 328                         data |= ESDHC_CTRL_D3CD;
 329                         writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
 330                 }
 331
 332                 if (val & SDHCI_INT_ADMA_ERROR) {
 333                         val &= ~SDHCI_INT_ADMA_ERROR;
 334                         val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR;
 335                 }
 336         }
 337
 338         if (unlikely((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
 339                                 && (reg == SDHCI_INT_STATUS)
 340                                 && (val & SDHCI_INT_DATA_END))) {
 341                         u32 v;
 342                         v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 343                         v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK;
 344                         writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
 345
 346                         if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS)
 347                         {
 348                                 /* send a manual CMD12 with RESPTYP=none */
 349                                 data = MMC_STOP_TRANSMISSION << 24 |
 350                                        SDHCI_CMD_ABORTCMD << 16;
 351                                 writel(data, host->ioaddr + SDHCI_TRANSFER_MODE);
 352                                 imx_data->multiblock_status = WAIT_FOR_INT;
 353                         }
 354         }
 355
 356         writel(val, host->ioaddr + reg);
 357 }
 358
 359 static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
 360 {
 361         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 362         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 363         u16 ret = 0;
 364         u32 val;
 365
 366         if (unlikely(reg == SDHCI_HOST_VERSION)) {
 367                 reg ^= 2;
 368                 if (esdhc_is_usdhc(imx_data)) {
 369                         /*
 370                          * The usdhc register returns a wrong host version.
 371                          * Correct it here.
 372                          */
 373                         return SDHCI_SPEC_300;
 374                 }
 375         }
 376
 377         if (unlikely(reg == SDHCI_HOST_CONTROL2)) {
 378                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 379                 if (val & ESDHC_VENDOR_SPEC_VSELECT)
 380                         ret |= SDHCI_CTRL_VDD_180;
 381
 382                 if (esdhc_is_usdhc(imx_data)) {
 383                         if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
 384                                 val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 385                         else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
 386                                 /* the std tuning bits is in ACMD12_ERR for imx6sl */
 387                                 val = readl(host->ioaddr + SDHCI_ACMD12_ERR);
 388                 }
 389
 390                 if (val & ESDHC_MIX_CTRL_EXE_TUNE)
 391                         ret |= SDHCI_CTRL_EXEC_TUNING;
 392                 if (val & ESDHC_MIX_CTRL_SMPCLK_SEL)
 393                         ret |= SDHCI_CTRL_TUNED_CLK;
 394
 395                 ret &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
 396
 397                 return ret;
 398         }
 399
 400         if (unlikely(reg == SDHCI_TRANSFER_MODE)) {
 401                 if (esdhc_is_usdhc(imx_data)) {
 402                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 403                         ret = m & ESDHC_MIX_CTRL_SDHCI_MASK;
 404                         /* Swap AC23 bit */
 405                         if (m & ESDHC_MIX_CTRL_AC23EN) {
 406                                 ret &= ~ESDHC_MIX_CTRL_AC23EN;
 407                                 ret |= SDHCI_TRNS_AUTO_CMD23;
 408                         }
 409                 } else {
 410                         ret = readw(host->ioaddr + SDHCI_TRANSFER_MODE);
 411                 }
 412
 413                 return ret;
 414         }
 415
 416         return readw(host->ioaddr + reg);
 417 }
 418
 419 static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
 420 {
 421         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 422         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 423         u32 new_val = 0;
 424
 425         switch (reg) {
 426         case SDHCI_CLOCK_CONTROL:
 427                 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 428                 if (val & SDHCI_CLOCK_CARD_EN)
 429                         new_val |= ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
 430                 else
 431                         new_val &= ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
 432                 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
 433                 return;
 434         case SDHCI_HOST_CONTROL2:
 435                 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 436                 if (val & SDHCI_CTRL_VDD_180)
 437                         new_val |= ESDHC_VENDOR_SPEC_VSELECT;
 438                 else
 439                         new_val &= ~ESDHC_VENDOR_SPEC_VSELECT;
 440                 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
 441                 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
 442                         new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 443                         if (val & SDHCI_CTRL_TUNED_CLK)
 444                                 new_val |= ESDHC_MIX_CTRL_SMPCLK_SEL;
 445                         else
 446                                 new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 447                         writel(new_val , host->ioaddr + ESDHC_MIX_CTRL);
 448                 } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
 449                         u32 v = readl(host->ioaddr + SDHCI_ACMD12_ERR);
 450                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 451                         if (val & SDHCI_CTRL_TUNED_CLK) {
 452                                 v |= ESDHC_MIX_CTRL_SMPCLK_SEL;
 453                         } else {
 454                                 v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 455                                 m &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
 456                         }
 457
 458                         if (val & SDHCI_CTRL_EXEC_TUNING) {
 459                                 v |= ESDHC_MIX_CTRL_EXE_TUNE;
 460                                 m |= ESDHC_MIX_CTRL_FBCLK_SEL;
 461                         } else {
 462                                 v &= ~ESDHC_MIX_CTRL_EXE_TUNE;
 463                         }
 464
 465                         writel(v, host->ioaddr + SDHCI_ACMD12_ERR);
 466                         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 467                 }
 468                 return;
 469         case SDHCI_TRANSFER_MODE:
 470                 if ((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
 471                                 && (host->cmd->opcode == SD_IO_RW_EXTENDED)
 472                                 && (host->cmd->data->blocks > 1)
 473                                 && (host->cmd->data->flags & MMC_DATA_READ)) {
 474                         u32 v;
 475                         v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 476                         v |= ESDHC_VENDOR_SPEC_SDIO_QUIRK;
 477                         writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
 478                 }
 479
 480                 if (esdhc_is_usdhc(imx_data)) {
 481                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 482                         /* Swap AC23 bit */
 483                         if (val & SDHCI_TRNS_AUTO_CMD23) {
 484                                 val &= ~SDHCI_TRNS_AUTO_CMD23;
 485                                 val |= ESDHC_MIX_CTRL_AC23EN;
 486                         }
 487                         m = val | (m & ~ESDHC_MIX_CTRL_SDHCI_MASK);
 488                         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 489                 } else {
 490                         /*
 491                          * Postpone this write, we must do it together with a
 492                          * command write that is down below.
 493                          */
 494                         imx_data->scratchpad = val;
 495                 }
 496                 return;
 497         case SDHCI_COMMAND:
 498                 if (host->cmd->opcode == MMC_STOP_TRANSMISSION)
 499                         val |= SDHCI_CMD_ABORTCMD;
 500
 501                 if ((host->cmd->opcode == MMC_SET_BLOCK_COUNT) &&
 502                     (imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
 503                         imx_data->multiblock_status = MULTIBLK_IN_PROCESS;
 504
 505                 if (esdhc_is_usdhc(imx_data))
 506                         writel(val << 16,
 507                                host->ioaddr + SDHCI_TRANSFER_MODE);
 508                 else
 509                         writel(val << 16 | imx_data->scratchpad,
 510                                host->ioaddr + SDHCI_TRANSFER_MODE);
 511                 return;
 512         case SDHCI_BLOCK_SIZE:
 513                 val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
 514                 break;
 515         }
 516         esdhc_clrset_le(host, 0xffff, val, reg);
 517 }
 518
 519 static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg)
 520 {
 521         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 522         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 523         u32 new_val;
 524         u32 mask;
 525
 526         switch (reg) {
 527         case SDHCI_POWER_CONTROL:
 528                 /*
 529                  * FSL put some DMA bits here
 530                  * If your board has a regulator, code should be here
 531                  */
 532                 return;
 533         case SDHCI_HOST_CONTROL:
 534                 /* FSL messed up here, so we need to manually compose it. */
 535                 new_val = val & SDHCI_CTRL_LED;
 536                 /* ensure the endianness */
 537                 new_val |= ESDHC_HOST_CONTROL_LE;
 538                 /* bits 8&9 are reserved on mx25 */
 539                 if (!is_imx25_esdhc(imx_data)) {
 540                         /* DMA mode bits are shifted */
 541                         new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
 542                 }
 543
 544                 /*
 545                  * Do not touch buswidth bits here. This is done in
 546                  * esdhc_pltfm_bus_width.
 547                  * Do not touch the D3CD bit either which is used for the
 548                  * SDIO interrupt errata workaround.
 549                  */
 550                 mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD);
 551
 552                 esdhc_clrset_le(host, mask, new_val, reg);
 553                 return;
 554         }
 555         esdhc_clrset_le(host, 0xff, val, reg);
 556
 557         /*
 558          * The esdhc has a design violation to SDHC spec which tells
 559          * that software reset should not affect card detection circuit.
 560          * But esdhc clears its SYSCTL register bits [0..2] during the
 561          * software reset.  This will stop those clocks that card detection
 562          * circuit relies on.  To work around it, we turn the clocks on back
 563          * to keep card detection circuit functional.
 564          */
 565         if ((reg == SDHCI_SOFTWARE_RESET) && (val & 1)) {
 566                 esdhc_clrset_le(host, 0x7, 0x7, ESDHC_SYSTEM_CONTROL);
 567                 /*
 568                  * The reset on usdhc fails to clear MIX_CTRL register.
 569                  * Do it manually here.
 570                  */
 571                 if (esdhc_is_usdhc(imx_data)) {
 572                         /* the tuning bits should be kept during reset */
 573                         new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 574                         writel(new_val & ESDHC_MIX_CTRL_TUNING_MASK,
 575                                         host->ioaddr + ESDHC_MIX_CTRL);
 576                         imx_data->is_ddr = 0;
 577                 }
 578         }
 579 }
 580
 581 static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host)
 582 {
 583         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 584         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 585         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 586
 587         if (boarddata->f_max && (boarddata->f_max < pltfm_host->clock))
 588                 return boarddata->f_max;
 589         else
 590                 return pltfm_host->clock;
 591 }
 592
 593 static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 594 {
 595         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 596
 597         return pltfm_host->clock / 256 / 16;
 598 }
 599
 600 static inline void esdhc_pltfm_set_clock(struct sdhci_host *host,
 601                                          unsigned int clock)
 602 {
 603         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 604         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 605         unsigned int host_clock = pltfm_host->clock;
 606         int pre_div = 2;
 607         int div = 1;
 608         u32 temp, val;
 609
 610         if (clock == 0) {
 611                 host->mmc->actual_clock = 0;
 612
 613                 if (esdhc_is_usdhc(imx_data)) {
 614                         val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 615                         writel(val & ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 616                                         host->ioaddr + ESDHC_VENDOR_SPEC);
 617                 }
 618                 return;
 619         }
 620
 621         if (esdhc_is_usdhc(imx_data) && !imx_data->is_ddr)
 622                 pre_div = 1;
 623
 624         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 625         temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 626                 | ESDHC_CLOCK_MASK);
 627         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 628
 629         while (host_clock / pre_div / 16 > clock && pre_div < 256)
 630                 pre_div *= 2;
 631
 632         while (host_clock / pre_div / div > clock && div < 16)
 633                 div++;
 634
 635         host->mmc->actual_clock = host_clock / pre_div / div;
 636         dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
 637                 clock, host->mmc->actual_clock);
 638
 639         if (imx_data->is_ddr)
 640                 pre_div >>= 2;
 641         else
 642                 pre_div >>= 1;
 643         div--;
 644
 645         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 646         temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 647                 | (div << ESDHC_DIVIDER_SHIFT)
 648                 | (pre_div << ESDHC_PREDIV_SHIFT));
 649         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 650
 651         if (esdhc_is_usdhc(imx_data)) {
 652                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 653                 writel(val | ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 654                 host->ioaddr + ESDHC_VENDOR_SPEC);
 655         }
 656
 657         mdelay(1);
 658 }
 659
 660 static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
 661 {
 662         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 663         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 664         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 665
 666         switch (boarddata->wp_type) {
 667         case ESDHC_WP_GPIO:
 668                 return mmc_gpio_get_ro(host->mmc);
 669         case ESDHC_WP_CONTROLLER:
 670                 return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 671                                SDHCI_WRITE_PROTECT);
 672         case ESDHC_WP_NONE:
 673                 break;
 674         }
 675
 676         return -ENOSYS;
 677 }
 678
 679 static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
 680 {
 681         u32 ctrl;
 682
 683         switch (width) {
 684         case MMC_BUS_WIDTH_8:
 685                 ctrl = ESDHC_CTRL_8BITBUS;
 686                 break;
 687         case MMC_BUS_WIDTH_4:
 688                 ctrl = ESDHC_CTRL_4BITBUS;
 689                 break;
 690         default:
 691                 ctrl = 0;
 692                 break;
 693         }
 694
 695         esdhc_clrset_le(host, ESDHC_CTRL_BUSWIDTH_MASK, ctrl,
 696                         SDHCI_HOST_CONTROL);
 697 }
 698
 699 static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
 700 {
 701         u32 reg;
 702
 703         /* FIXME: delay a bit for card to be ready for next tuning due to errors */
 704         mdelay(1);
 705
 706         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
 707         reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
 708                         ESDHC_MIX_CTRL_FBCLK_SEL;
 709         writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
 710         writel(val << 8, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
 711         dev_dbg(mmc_dev(host->mmc),
 712                 "tunning with delay 0x%x ESDHC_TUNE_CTRL_STATUS 0x%x\n",
 713                         val, readl(host->ioaddr + ESDHC_TUNE_CTRL_STATUS));
 714 }
 715
 716 static void esdhc_post_tuning(struct sdhci_host *host)
 717 {
 718         u32 reg;
 719
 720         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
 721         reg &= ~ESDHC_MIX_CTRL_EXE_TUNE;
 722         writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
 723 }
 724
 725 static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
 726 {
 727         int min, max, avg, ret;
 728
 729         /* find the mininum delay first which can pass tuning */
 730         min = ESDHC_TUNE_CTRL_MIN;
 731         while (min < ESDHC_TUNE_CTRL_MAX) {
 732                 esdhc_prepare_tuning(host, min);
 733                 if (!mmc_send_tuning(host->mmc))
 734                         break;
 735                 min += ESDHC_TUNE_CTRL_STEP;
 736         }
 737
 738         /* find the maxinum delay which can not pass tuning */
 739         max = min + ESDHC_TUNE_CTRL_STEP;
 740         while (max < ESDHC_TUNE_CTRL_MAX) {
 741                 esdhc_prepare_tuning(host, max);
 742                 if (mmc_send_tuning(host->mmc)) {
 743                         max -= ESDHC_TUNE_CTRL_STEP;
 744                         break;
 745                 }
 746                 max += ESDHC_TUNE_CTRL_STEP;
 747         }
 748
 749         /* use average delay to get the best timing */
 750         avg = (min + max) / 2;
 751         esdhc_prepare_tuning(host, avg);
 752         ret = mmc_send_tuning(host->mmc);
 753         esdhc_post_tuning(host);
 754
 755         dev_dbg(mmc_dev(host->mmc), "tunning %s at 0x%x ret %d\n",
 756                 ret ? "failed" : "passed", avg, ret);
 757
 758         return ret;
 759 }
 760
 761 static int esdhc_change_pinstate(struct sdhci_host *host,
 762                                                 unsigned int uhs)
 763 {
 764         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 765         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 766         struct pinctrl_state *pinctrl;
 767
 768         dev_dbg(mmc_dev(host->mmc), "change pinctrl state for uhs %d\n", uhs);
 769
 770         if (IS_ERR(imx_data->pinctrl) ||
 771                 IS_ERR(imx_data->pins_default) ||
 772                 IS_ERR(imx_data->pins_100mhz) ||
 773                 IS_ERR(imx_data->pins_200mhz))
 774                 return -EINVAL;
 775
 776         switch (uhs) {
 777         case MMC_TIMING_UHS_SDR50:
 778                 pinctrl = imx_data->pins_100mhz;
 779                 break;
 780         case MMC_TIMING_UHS_SDR104:
 781         case MMC_TIMING_MMC_HS200:
 782                 pinctrl = imx_data->pins_200mhz;
 783                 break;
 784         default:
 785                 /* back to default state for other legacy timing */
 786                 pinctrl = imx_data->pins_default;
 787         }
 788
 789         return pinctrl_select_state(imx_data->pinctrl, pinctrl);
 790 }
 791
 792 static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
 793 {
 794         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 795         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 796         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 797
 798         switch (timing) {
 799         case MMC_TIMING_UHS_SDR12:
 800         case MMC_TIMING_UHS_SDR25:
 801         case MMC_TIMING_UHS_SDR50:
 802         case MMC_TIMING_UHS_SDR104:
 803         case MMC_TIMING_MMC_HS200:
 804                 break;
 805         case MMC_TIMING_UHS_DDR50:
 806         case MMC_TIMING_MMC_DDR52:
 807                 writel(readl(host->ioaddr + ESDHC_MIX_CTRL) |
 808                                 ESDHC_MIX_CTRL_DDREN,
 809                                 host->ioaddr + ESDHC_MIX_CTRL);
 810                 imx_data->is_ddr = 1;
 811                 if (boarddata->delay_line) {
 812                         u32 v;
 813                         v = boarddata->delay_line <<
 814                                 ESDHC_DLL_OVERRIDE_VAL_SHIFT |
 815                                 (1 << ESDHC_DLL_OVERRIDE_EN_SHIFT);
 816                         if (is_imx53_esdhc(imx_data))
 817                                 v <<= 1;
 818                         writel(v, host->ioaddr + ESDHC_DLL_CTRL);
 819                 }
 820                 break;
 821         }
 822
 823         esdhc_change_pinstate(host, timing);
 824 }
 825
 826 static void esdhc_reset(struct sdhci_host *host, u8 mask)
 827 {
 828         sdhci_reset(host, mask);
 829
 830         sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
 831         sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
 832 }
 833
 834 static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host)
 835 {
 836         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 837         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 838
 839         return esdhc_is_usdhc(imx_data) ? 1 << 28 : 1 << 27;
 840 }
 841
 842 static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
 843 {
 844         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 845         struct pltfm_imx_data *imx_data = pltfm_host->priv;
 846
 847         /* use maximum timeout counter */
 848         sdhci_writeb(host, esdhc_is_usdhc(imx_data) ? 0xF : 0xE,
 849                         SDHCI_TIMEOUT_CONTROL);
 850 }
 851
 852 static struct sdhci_ops sdhci_esdhc_ops = {
 853         .read_l = esdhc_readl_le,
 854         .read_w = esdhc_readw_le,
 855         .write_l = esdhc_writel_le,
 856         .write_w = esdhc_writew_le,
 857         .write_b = esdhc_writeb_le,
 858         .set_clock = esdhc_pltfm_set_clock,
 859         .get_max_clock = esdhc_pltfm_get_max_clock,
 860         .get_min_clock = esdhc_pltfm_get_min_clock,
 861         .get_max_timeout_count = esdhc_get_max_timeout_count,
 862         .get_ro = esdhc_pltfm_get_ro,
 863         .set_timeout = esdhc_set_timeout,
 864         .set_bus_width = esdhc_pltfm_set_bus_width,
 865         .set_uhs_signaling = esdhc_set_uhs_signaling,
 866         .reset = esdhc_reset,
 867 };
 868
 869 static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
 870         .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT
 871                         | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
 872                         | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC
 873                         | SDHCI_QUIRK_BROKEN_CARD_DETECTION,
 874         .ops = &sdhci_esdhc_ops,
 875 };
 876
 877 #ifdef CONFIG_OF
 878 static int
 879 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
 880                          struct sdhci_host *host,
 881                          struct esdhc_platform_data *boarddata)
 882 {
 883         struct device_node *np = pdev->dev.of_node;
 884
 885         if (!np)
 886                 return -ENODEV;
 887
 888         if (of_get_property(np, "non-removable", NULL))
 889                 boarddata->cd_type = ESDHC_CD_PERMANENT;
 890
 891         if (of_get_property(np, "fsl,cd-controller", NULL))
 892                 boarddata->cd_type = ESDHC_CD_CONTROLLER;
 893
 894         if (of_get_property(np, "fsl,wp-controller", NULL))
 895                 boarddata->wp_type = ESDHC_WP_CONTROLLER;
 896
 897         boarddata->cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
 898         if (gpio_is_valid(boarddata->cd_gpio))
 899                 boarddata->cd_type = ESDHC_CD_GPIO;
 900
 901         boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
 902         if (gpio_is_valid(boarddata->wp_gpio))
 903                 boarddata->wp_type = ESDHC_WP_GPIO;
 904
 905         of_property_read_u32(np, "bus-width", &boarddata->max_bus_width);
 906
 907         of_property_read_u32(np, "max-frequency", &boarddata->f_max);
 908
 909         if (of_find_property(np, "no-1-8-v", NULL))
 910                 boarddata->support_vsel = false;
 911         else
 912                 boarddata->support_vsel = true;
 913
 914         if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line))
 915                 boarddata->delay_line = 0;
 916
 917         mmc_of_parse_voltage(np, &host->ocr_mask);
 918
 919         /* call to generic mmc_of_parse to support additional capabilities */
 920         return mmc_of_parse(host->mmc);
 921 }
 922 #else
 923 static inline int
 924 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
 925                          struct sdhci_host *host,
 926                          struct esdhc_platform_data *boarddata)
 927 {
 928         return -ENODEV;
 929 }
 930 #endif
 931
 932 static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
 933 {
 934         const struct of_device_id *of_id =
 935                         of_match_device(imx_esdhc_dt_ids, &pdev->dev);
 936         struct sdhci_pltfm_host *pltfm_host;
 937         struct sdhci_host *host;
 938         struct esdhc_platform_data *boarddata;
 939         int err;
 940         struct pltfm_imx_data *imx_data;
 941         bool dt = true;
 942
 943         host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata, 0);
 944         if (IS_ERR(host))
 945                 return PTR_ERR(host);
 946
 947         pltfm_host = sdhci_priv(host);
 948
 949         imx_data = devm_kzalloc(&pdev->dev, sizeof(*imx_data), GFP_KERNEL);
 950         if (!imx_data) {
 951                 err = -ENOMEM;
 952                 goto free_sdhci;
 953         }
 954
 955         imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *)
 956                                                   pdev->id_entry->driver_data;
 957         pltfm_host->priv = imx_data;
 958
 959         imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
 960         if (IS_ERR(imx_data->clk_ipg)) {
 961                 err = PTR_ERR(imx_data->clk_ipg);
 962                 goto free_sdhci;
 963         }
 964
 965         imx_data->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
 966         if (IS_ERR(imx_data->clk_ahb)) {
 967                 err = PTR_ERR(imx_data->clk_ahb);
 968                 goto free_sdhci;
 969         }
 970
 971         imx_data->clk_per = devm_clk_get(&pdev->dev, "per");
 972         if (IS_ERR(imx_data->clk_per)) {
 973                 err = PTR_ERR(imx_data->clk_per);
 974                 goto free_sdhci;
 975         }
 976
 977         pltfm_host->clk = imx_data->clk_per;
 978         pltfm_host->clock = clk_get_rate(pltfm_host->clk);
 979         clk_prepare_enable(imx_data->clk_per);
 980         clk_prepare_enable(imx_data->clk_ipg);
 981         clk_prepare_enable(imx_data->clk_ahb);
 982
 983         imx_data->pinctrl = devm_pinctrl_get(&pdev->dev);
 984         if (IS_ERR(imx_data->pinctrl)) {
 985                 err = PTR_ERR(imx_data->pinctrl);
 986                 goto disable_clk;
 987         }
 988
 989         imx_data->pins_default = pinctrl_lookup_state(imx_data->pinctrl,
 990                                                 PINCTRL_STATE_DEFAULT);
 991         if (IS_ERR(imx_data->pins_default))
 992                 dev_warn(mmc_dev(host->mmc), "could not get default state\n");
 993
 994         host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 995
 996         if (imx_data->socdata->flags & ESDHC_FLAG_ENGCM07207)
 997                 /* Fix errata ENGcm07207 present on i.MX25 and i.MX35 */
 998                 host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK
 999                         | SDHCI_QUIRK_BROKEN_ADMA;
1000
1001         /*
1002          * The imx6q ROM code will change the default watermark level setting
1003          * to something insane.  Change it back here.
1004          */
1005         if (esdhc_is_usdhc(imx_data)) {
1006                 writel(0x08100810, host->ioaddr + ESDHC_WTMK_LVL);
1007                 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
1008                 host->mmc->caps |= MMC_CAP_1_8V_DDR;
1009
1010                 if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
1011                         host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
1012
1013                 /*
1014                 * errata ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL
1015                 * TO1.1, it's harmless for MX6SL
1016                 */
1017                 writel(readl(host->ioaddr + 0x6c) | BIT(7),
1018                         host->ioaddr + 0x6c);
1019         }
1020
1021         if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
1022                 sdhci_esdhc_ops.platform_execute_tuning =
1023                                         esdhc_executing_tuning;
1024
1025         if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
1026                 writel(readl(host->ioaddr + ESDHC_TUNING_CTRL) |
1027                         ESDHC_STD_TUNING_EN | ESDHC_TUNING_START_TAP,
1028                         host->ioaddr + ESDHC_TUNING_CTRL);
1029
1030         if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536)
1031                 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1032
1033         boarddata = &imx_data->boarddata;
1034         if (sdhci_esdhc_imx_probe_dt(pdev, host, boarddata) < 0) {
1035                 if (!host->mmc->parent->platform_data) {
1036                         dev_err(mmc_dev(host->mmc), "no board data!\n");
1037                         err = -EINVAL;
1038                         goto disable_clk;
1039                 }
1040                 imx_data->boarddata = *((struct esdhc_platform_data *)
1041                                         host->mmc->parent->platform_data);
1042                 dt = false;
1043         }
1044         /* write_protect */
1045         if (boarddata->wp_type == ESDHC_WP_GPIO && !dt) {
1046                 err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio);
1047                 if (err) {
1048                         dev_err(mmc_dev(host->mmc),
1049                                 "failed to request write-protect gpio!\n");
1050                         goto disable_clk;
1051                 }
1052                 host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
1053         }
1054
1055         /* card_detect */
1056         switch (boarddata->cd_type) {
1057         case ESDHC_CD_GPIO:
1058                 if (dt)
1059                         break;
1060                 err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0);
1061                 if (err) {
1062                         dev_err(mmc_dev(host->mmc),
1063                                 "failed to request card-detect gpio!\n");
1064                         goto disable_clk;
1065                 }
1066                 /* fall through */
1067
1068         case ESDHC_CD_CONTROLLER:
1069                 /* we have a working card_detect back */
1070                 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1071                 break;
1072
1073         case ESDHC_CD_PERMANENT:
1074                 host->mmc->caps |= MMC_CAP_NONREMOVABLE;
1075                 break;
1076
1077         case ESDHC_CD_NONE:
1078                 break;
1079         }
1080
1081         switch (boarddata->max_bus_width) {
1082         case 8:
1083                 host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA;
1084                 break;
1085         case 4:
1086                 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
1087                 break;
1088         case 1:
1089         default:
1090                 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
1091                 break;
1092         }
1093
1094         /* sdr50 and sdr104 needs work on 1.8v signal voltage */
1095         if ((boarddata->support_vsel) && esdhc_is_usdhc(imx_data) &&
1096             !IS_ERR(imx_data->pins_default)) {
1097                 imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
1098                                                 ESDHC_PINCTRL_STATE_100MHZ);
1099                 imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,
1100                                                 ESDHC_PINCTRL_STATE_200MHZ);
1101                 if (IS_ERR(imx_data->pins_100mhz) ||
1102                                 IS_ERR(imx_data->pins_200mhz)) {
1103                         dev_warn(mmc_dev(host->mmc),
1104                                 "could not get ultra high speed state, work on normal mode\n");
1105                         /* fall back to not support uhs by specify no 1.8v quirk */
1106                         host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1107                 }
1108         } else {
1109                 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1110         }
1111
1112         err = sdhci_add_host(host);
1113         if (err)
1114                 goto disable_clk;
1115
1116         pm_runtime_set_active(&pdev->dev);
1117         pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
1118         pm_runtime_use_autosuspend(&pdev->dev);
1119         pm_suspend_ignore_children(&pdev->dev, 1);
1120         pm_runtime_enable(&pdev->dev);
1121
1122         return 0;
1123
1124 disable_clk:
1125         clk_disable_unprepare(imx_data->clk_per);
1126         clk_disable_unprepare(imx_data->clk_ipg);
1127         clk_disable_unprepare(imx_data->clk_ahb);
1128 free_sdhci:
1129         sdhci_pltfm_free(pdev);
1130         return err;
1131 }
1132
1133 static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
1134 {
1135         struct sdhci_host *host = platform_get_drvdata(pdev);
1136         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1137         struct pltfm_imx_data *imx_data = pltfm_host->priv;
1138         int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
1139
1140         pm_runtime_get_sync(&pdev->dev);
1141         pm_runtime_disable(&pdev->dev);
1142         pm_runtime_put_noidle(&pdev->dev);
1143
1144         sdhci_remove_host(host, dead);
1145
1146         clk_disable_unprepare(imx_data->clk_per);
1147         clk_disable_unprepare(imx_data->clk_ipg);
1148         clk_disable_unprepare(imx_data->clk_ahb);
1149
1150         sdhci_pltfm_free(pdev);
1151
1152         return 0;
1153 }
1154
1155 #ifdef CONFIG_PM
1156 static int sdhci_esdhc_runtime_suspend(struct device *dev)
1157 {
1158         struct sdhci_host *host = dev_get_drvdata(dev);
1159         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1160         struct pltfm_imx_data *imx_data = pltfm_host->priv;
1161         int ret;
1162
1163         ret = sdhci_runtime_suspend_host(host);
1164
1165         if (!sdhci_sdio_irq_enabled(host)) {
1166                 clk_disable_unprepare(imx_data->clk_per);
1167                 clk_disable_unprepare(imx_data->clk_ipg);
1168         }
1169         clk_disable_unprepare(imx_data->clk_ahb);
1170
1171         return ret;
1172 }
1173
1174 static int sdhci_esdhc_runtime_resume(struct device *dev)
1175 {
1176         struct sdhci_host *host = dev_get_drvdata(dev);
1177         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1178         struct pltfm_imx_data *imx_data = pltfm_host->priv;
1179
1180         if (!sdhci_sdio_irq_enabled(host)) {
1181                 clk_prepare_enable(imx_data->clk_per);
1182                 clk_prepare_enable(imx_data->clk_ipg);
1183         }
1184         clk_prepare_enable(imx_data->clk_ahb);
1185
1186         return sdhci_runtime_resume_host(host);
1187 }
1188 #endif
1189
1190 static const struct dev_pm_ops sdhci_esdhc_pmops = {
1191         SET_SYSTEM_SLEEP_PM_OPS(sdhci_pltfm_suspend, sdhci_pltfm_resume)
1192         SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend,
1193                                 sdhci_esdhc_runtime_resume, NULL)
1194 };
1195
1196 static struct platform_driver sdhci_esdhc_imx_driver = {
1197         .driver         = {
1198                 .name   = "sdhci-esdhc-imx",
1199                 .of_match_table = imx_esdhc_dt_ids,
1200                 .pm     = &sdhci_esdhc_pmops,
1201         },
1202         .id_table       = imx_esdhc_devtype,
1203         .probe          = sdhci_esdhc_imx_probe,
1204         .remove         = sdhci_esdhc_imx_remove,
1205 };
1206
1207 module_platform_driver(sdhci_esdhc_imx_driver);
1208
1209 MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
1210 MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
1211 MODULE_LICENSE("GPL v2");