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 <[email protected]>
   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_SYS_CTRL_DTOCV_MASK       0x0f
  35 #define ESDHC_CTRL_D3CD                 0x08
  36 #define ESDHC_BURST_LEN_EN_INCR         (1 << 27)
  37 /* VENDOR SPEC register */
  38 #define ESDHC_VENDOR_SPEC               0xc0
  39 #define  ESDHC_VENDOR_SPEC_SDIO_QUIRK   (1 << 1)
  40 #define  ESDHC_VENDOR_SPEC_VSELECT      (1 << 1)
  41 #define  ESDHC_VENDOR_SPEC_FRC_SDCLK_ON (1 << 8)
  42 #define ESDHC_WTMK_LVL                  0x44
  43 #define  ESDHC_WTMK_DEFAULT_VAL         0x10401040
  44 #define  ESDHC_WTMK_LVL_RD_WML_MASK     0x000000FF
  45 #define  ESDHC_WTMK_LVL_RD_WML_SHIFT    0
  46 #define  ESDHC_WTMK_LVL_WR_WML_MASK     0x00FF0000
  47 #define  ESDHC_WTMK_LVL_WR_WML_SHIFT    16
  48 #define  ESDHC_WTMK_LVL_WML_VAL_DEF     64
  49 #define  ESDHC_WTMK_LVL_WML_VAL_MAX     128
  50 #define ESDHC_MIX_CTRL                  0x48
  51 #define  ESDHC_MIX_CTRL_DDREN           (1 << 3)
  52 #define  ESDHC_MIX_CTRL_AC23EN          (1 << 7)
  53 #define  ESDHC_MIX_CTRL_EXE_TUNE        (1 << 22)
  54 #define  ESDHC_MIX_CTRL_SMPCLK_SEL      (1 << 23)
  55 #define  ESDHC_MIX_CTRL_AUTO_TUNE_EN    (1 << 24)
  56 #define  ESDHC_MIX_CTRL_FBCLK_SEL       (1 << 25)
  57 #define  ESDHC_MIX_CTRL_HS400_EN        (1 << 26)
  58 /* Bits 3 and 6 are not SDHCI standard definitions */
  59 #define  ESDHC_MIX_CTRL_SDHCI_MASK      0xb7
  60 /* Tuning bits */
  61 #define  ESDHC_MIX_CTRL_TUNING_MASK     0x03c00000
  62
  63 /* dll control register */
  64 #define ESDHC_DLL_CTRL                  0x60
  65 #define ESDHC_DLL_OVERRIDE_VAL_SHIFT    9
  66 #define ESDHC_DLL_OVERRIDE_EN_SHIFT     8
  67
  68 /* tune control register */
  69 #define ESDHC_TUNE_CTRL_STATUS          0x68
  70 #define  ESDHC_TUNE_CTRL_STEP           1
  71 #define  ESDHC_TUNE_CTRL_MIN            0
  72 #define  ESDHC_TUNE_CTRL_MAX            ((1 << 7) - 1)
  73
  74 /* strobe dll register */
  75 #define ESDHC_STROBE_DLL_CTRL           0x70
  76 #define ESDHC_STROBE_DLL_CTRL_ENABLE    (1 << 0)
  77 #define ESDHC_STROBE_DLL_CTRL_RESET     (1 << 1)
  78 #define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT      3
  79
  80 #define ESDHC_STROBE_DLL_STATUS         0x74
  81 #define ESDHC_STROBE_DLL_STS_REF_LOCK   (1 << 1)
  82 #define ESDHC_STROBE_DLL_STS_SLV_LOCK   0x1
  83
  84 #define ESDHC_TUNING_CTRL               0xcc
  85 #define ESDHC_STD_TUNING_EN             (1 << 24)
  86 /* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
  87 #define ESDHC_TUNING_START_TAP_DEFAULT  0x1
  88 #define ESDHC_TUNING_START_TAP_MASK     0xff
  89 #define ESDHC_TUNING_STEP_MASK          0x00070000
  90 #define ESDHC_TUNING_STEP_SHIFT         16
  91
  92 /* pinctrl state */
  93 #define ESDHC_PINCTRL_STATE_100MHZ      "state_100mhz"
  94 #define ESDHC_PINCTRL_STATE_200MHZ      "state_200mhz"
  95
  96 /*
  97  * Our interpretation of the SDHCI_HOST_CONTROL register
  98  */
  99 #define ESDHC_CTRL_4BITBUS              (0x1 << 1)
 100 #define ESDHC_CTRL_8BITBUS              (0x2 << 1)
 101 #define ESDHC_CTRL_BUSWIDTH_MASK        (0x3 << 1)
 102
 103 /*
 104  * There is an INT DMA ERR mismatch between eSDHC and STD SDHC SPEC:
 105  * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design,
 106  * but bit28 is used as the INT DMA ERR in fsl eSDHC design.
 107  * Define this macro DMA error INT for fsl eSDHC
 108  */
 109 #define ESDHC_INT_VENDOR_SPEC_DMA_ERR   (1 << 28)
 110
 111 /*
 112  * The CMDTYPE of the CMD register (offset 0xE) should be set to
 113  * "11" when the STOP CMD12 is issued on imx53 to abort one
 114  * open ended multi-blk IO. Otherwise the TC INT wouldn't
 115  * be generated.
 116  * In exact block transfer, the controller doesn't complete the
 117  * operations automatically as required at the end of the
 118  * transfer and remains on hold if the abort command is not sent.
 119  * As a result, the TC flag is not asserted and SW received timeout
 120  * exception. Bit1 of Vendor Spec register is used to fix it.
 121  */
 122 #define ESDHC_FLAG_MULTIBLK_NO_INT      BIT(1)
 123 /*
 124  * The flag tells that the ESDHC controller is an USDHC block that is
 125  * integrated on the i.MX6 series.
 126  */
 127 #define ESDHC_FLAG_USDHC                BIT(3)
 128 /* The IP supports manual tuning process */
 129 #define ESDHC_FLAG_MAN_TUNING           BIT(4)
 130 /* The IP supports standard tuning process */
 131 #define ESDHC_FLAG_STD_TUNING           BIT(5)
 132 /* The IP has SDHCI_CAPABILITIES_1 register */
 133 #define ESDHC_FLAG_HAVE_CAP1            BIT(6)
 134 /*
 135  * The IP has erratum ERR004536
 136  * uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow,
 137  * when reading data from the card
 138  * This flag is also set for i.MX25 and i.MX35 in order to get
 139  * SDHCI_QUIRK_BROKEN_ADMA, but for different reasons (ADMA capability bits).
 140  */
 141 #define ESDHC_FLAG_ERR004536            BIT(7)
 142 /* The IP supports HS200 mode */
 143 #define ESDHC_FLAG_HS200                BIT(8)
 144 /* The IP supports HS400 mode */
 145 #define ESDHC_FLAG_HS400                BIT(9)
 146
 147 /* A clock frequency higher than this rate requires strobe dll control */
 148 #define ESDHC_STROBE_DLL_CLK_FREQ       100000000
 149
 150 struct esdhc_soc_data {
 151         u32 flags;
 152 };
 153
 154 static struct esdhc_soc_data esdhc_imx25_data = {
 155         .flags = ESDHC_FLAG_ERR004536,
 156 };
 157
 158 static struct esdhc_soc_data esdhc_imx35_data = {
 159         .flags = ESDHC_FLAG_ERR004536,
 160 };
 161
 162 static struct esdhc_soc_data esdhc_imx51_data = {
 163         .flags = 0,
 164 };
 165
 166 static struct esdhc_soc_data esdhc_imx53_data = {
 167         .flags = ESDHC_FLAG_MULTIBLK_NO_INT,
 168 };
 169
 170 static struct esdhc_soc_data usdhc_imx6q_data = {
 171         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING,
 172 };
 173
 174 static struct esdhc_soc_data usdhc_imx6sl_data = {
 175         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 176                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536
 177                         | ESDHC_FLAG_HS200,
 178 };
 179
 180 static struct esdhc_soc_data usdhc_imx6sx_data = {
 181         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 182                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200,
 183 };
 184
 185 static struct esdhc_soc_data usdhc_imx7d_data = {
 186         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 187                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
 188                         | ESDHC_FLAG_HS400,
 189 };
 190
 191 struct pltfm_imx_data {
 192         u32 scratchpad;
 193         struct pinctrl *pinctrl;
 194         struct pinctrl_state *pins_default;
 195         struct pinctrl_state *pins_100mhz;
 196         struct pinctrl_state *pins_200mhz;
 197         const struct esdhc_soc_data *socdata;
 198         struct esdhc_platform_data boarddata;
 199         struct clk *clk_ipg;
 200         struct clk *clk_ahb;
 201         struct clk *clk_per;
 202         unsigned int actual_clock;
 203         enum {
 204                 NO_CMD_PENDING,      /* no multiblock command pending */
 205                 MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */
 206                 WAIT_FOR_INT,        /* sent CMD12, waiting for response INT */
 207         } multiblock_status;
 208         u32 is_ddr;
 209 };
 210
 211 static const struct platform_device_id imx_esdhc_devtype[] = {
 212         {
 213                 .name = "sdhci-esdhc-imx25",
 214                 .driver_data = (kernel_ulong_t) &esdhc_imx25_data,
 215         }, {
 216                 .name = "sdhci-esdhc-imx35",
 217                 .driver_data = (kernel_ulong_t) &esdhc_imx35_data,
 218         }, {
 219                 .name = "sdhci-esdhc-imx51",
 220                 .driver_data = (kernel_ulong_t) &esdhc_imx51_data,
 221         }, {
 222                 /* sentinel */
 223         }
 224 };
 225 MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype);
 226
 227 static const struct of_device_id imx_esdhc_dt_ids[] = {
 228         { .compatible = "fsl,imx25-esdhc", .data = &esdhc_imx25_data, },
 229         { .compatible = "fsl,imx35-esdhc", .data = &esdhc_imx35_data, },
 230         { .compatible = "fsl,imx51-esdhc", .data = &esdhc_imx51_data, },
 231         { .compatible = "fsl,imx53-esdhc", .data = &esdhc_imx53_data, },
 232         { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, },
 233         { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, },
 234         { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
 235         { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, },
 236         { /* sentinel */ }
 237 };
 238 MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
 239
 240 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
 241 {
 242         return data->socdata == &esdhc_imx25_data;
 243 }
 244
 245 static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
 246 {
 247         return data->socdata == &esdhc_imx53_data;
 248 }
 249
 250 static inline int is_imx6q_usdhc(struct pltfm_imx_data *data)
 251 {
 252         return data->socdata == &usdhc_imx6q_data;
 253 }
 254
 255 static inline int esdhc_is_usdhc(struct pltfm_imx_data *data)
 256 {
 257         return !!(data->socdata->flags & ESDHC_FLAG_USDHC);
 258 }
 259
 260 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
 261 {
 262         void __iomem *base = host->ioaddr + (reg & ~0x3);
 263         u32 shift = (reg & 0x3) * 8;
 264
 265         writel(((readl(base) & ~(mask << shift)) | (val << shift)), base);
 266 }
 267
 268 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 269 {
 270         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 271         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 272         u32 val = readl(host->ioaddr + reg);
 273
 274         if (unlikely(reg == SDHCI_PRESENT_STATE)) {
 275                 u32 fsl_prss = val;
 276                 /* save the least 20 bits */
 277                 val = fsl_prss & 0x000FFFFF;
 278                 /* move dat[0-3] bits */
 279                 val |= (fsl_prss & 0x0F000000) >> 4;
 280                 /* move cmd line bit */
 281                 val |= (fsl_prss & 0x00800000) << 1;
 282         }
 283
 284         if (unlikely(reg == SDHCI_CAPABILITIES)) {
 285                 /* ignore bit[0-15] as it stores cap_1 register val for mx6sl */
 286                 if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
 287                         val &= 0xffff0000;
 288
 289                 /* In FSL esdhc IC module, only bit20 is used to indicate the
 290                  * ADMA2 capability of esdhc, but this bit is messed up on
 291                  * some SOCs (e.g. on MX25, MX35 this bit is set, but they
 292                  * don't actually support ADMA2). So set the BROKEN_ADMA
 293                  * quirk on MX25/35 platforms.
 294                  */
 295
 296                 if (val & SDHCI_CAN_DO_ADMA1) {
 297                         val &= ~SDHCI_CAN_DO_ADMA1;
 298                         val |= SDHCI_CAN_DO_ADMA2;
 299                 }
 300         }
 301
 302         if (unlikely(reg == SDHCI_CAPABILITIES_1)) {
 303                 if (esdhc_is_usdhc(imx_data)) {
 304                         if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
 305                                 val = readl(host->ioaddr + SDHCI_CAPABILITIES) & 0xFFFF;
 306                         else
 307                                 /* imx6q/dl does not have cap_1 register, fake one */
 308                                 val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104
 309                                         | SDHCI_SUPPORT_SDR50
 310                                         | SDHCI_USE_SDR50_TUNING
 311                                         | (SDHCI_TUNING_MODE_3 << SDHCI_RETUNING_MODE_SHIFT);
 312
 313                         if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
 314                                 val |= SDHCI_SUPPORT_HS400;
 315                 }
 316         }
 317
 318         if (unlikely(reg == SDHCI_MAX_CURRENT) && esdhc_is_usdhc(imx_data)) {
 319                 val = 0;
 320                 val |= 0xFF << SDHCI_MAX_CURRENT_330_SHIFT;
 321                 val |= 0xFF << SDHCI_MAX_CURRENT_300_SHIFT;
 322                 val |= 0xFF << SDHCI_MAX_CURRENT_180_SHIFT;
 323         }
 324
 325         if (unlikely(reg == SDHCI_INT_STATUS)) {
 326                 if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) {
 327                         val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR;
 328                         val |= SDHCI_INT_ADMA_ERROR;
 329                 }
 330
 331                 /*
 332                  * mask off the interrupt we get in response to the manually
 333                  * sent CMD12
 334                  */
 335                 if ((imx_data->multiblock_status == WAIT_FOR_INT) &&
 336                     ((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) {
 337                         val &= ~SDHCI_INT_RESPONSE;
 338                         writel(SDHCI_INT_RESPONSE, host->ioaddr +
 339                                                    SDHCI_INT_STATUS);
 340                         imx_data->multiblock_status = NO_CMD_PENDING;
 341                 }
 342         }
 343
 344         return val;
 345 }
 346
 347 static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 348 {
 349         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 350         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 351         u32 data;
 352
 353         if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE ||
 354                         reg == SDHCI_INT_STATUS)) {
 355                 if ((val & SDHCI_INT_CARD_INT) && !esdhc_is_usdhc(imx_data)) {
 356                         /*
 357                          * Clear and then set D3CD bit to avoid missing the
 358                          * card interrupt. This is an eSDHC controller problem
 359                          * so we need to apply the following workaround: clear
 360                          * and set D3CD bit will make eSDHC re-sample the card
 361                          * interrupt. In case a card interrupt was lost,
 362                          * re-sample it by the following steps.
 363                          */
 364                         data = readl(host->ioaddr + SDHCI_HOST_CONTROL);
 365                         data &= ~ESDHC_CTRL_D3CD;
 366                         writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
 367                         data |= ESDHC_CTRL_D3CD;
 368                         writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
 369                 }
 370
 371                 if (val & SDHCI_INT_ADMA_ERROR) {
 372                         val &= ~SDHCI_INT_ADMA_ERROR;
 373                         val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR;
 374                 }
 375         }
 376
 377         if (unlikely((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
 378                                 && (reg == SDHCI_INT_STATUS)
 379                                 && (val & SDHCI_INT_DATA_END))) {
 380                         u32 v;
 381                         v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 382                         v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK;
 383                         writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
 384
 385                         if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS)
 386                         {
 387                                 /* send a manual CMD12 with RESPTYP=none */
 388                                 data = MMC_STOP_TRANSMISSION << 24 |
 389                                        SDHCI_CMD_ABORTCMD << 16;
 390                                 writel(data, host->ioaddr + SDHCI_TRANSFER_MODE);
 391                                 imx_data->multiblock_status = WAIT_FOR_INT;
 392                         }
 393         }
 394
 395         writel(val, host->ioaddr + reg);
 396 }
 397
 398 static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
 399 {
 400         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 401         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 402         u16 ret = 0;
 403         u32 val;
 404
 405         if (unlikely(reg == SDHCI_HOST_VERSION)) {
 406                 reg ^= 2;
 407                 if (esdhc_is_usdhc(imx_data)) {
 408                         /*
 409                          * The usdhc register returns a wrong host version.
 410                          * Correct it here.
 411                          */
 412                         return SDHCI_SPEC_300;
 413                 }
 414         }
 415
 416         if (unlikely(reg == SDHCI_HOST_CONTROL2)) {
 417                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 418                 if (val & ESDHC_VENDOR_SPEC_VSELECT)
 419                         ret |= SDHCI_CTRL_VDD_180;
 420
 421                 if (esdhc_is_usdhc(imx_data)) {
 422                         if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
 423                                 val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 424                         else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
 425                                 /* the std tuning bits is in ACMD12_ERR for imx6sl */
 426                                 val = readl(host->ioaddr + SDHCI_ACMD12_ERR);
 427                 }
 428
 429                 if (val & ESDHC_MIX_CTRL_EXE_TUNE)
 430                         ret |= SDHCI_CTRL_EXEC_TUNING;
 431                 if (val & ESDHC_MIX_CTRL_SMPCLK_SEL)
 432                         ret |= SDHCI_CTRL_TUNED_CLK;
 433
 434                 ret &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
 435
 436                 return ret;
 437         }
 438
 439         if (unlikely(reg == SDHCI_TRANSFER_MODE)) {
 440                 if (esdhc_is_usdhc(imx_data)) {
 441                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 442                         ret = m & ESDHC_MIX_CTRL_SDHCI_MASK;
 443                         /* Swap AC23 bit */
 444                         if (m & ESDHC_MIX_CTRL_AC23EN) {
 445                                 ret &= ~ESDHC_MIX_CTRL_AC23EN;
 446                                 ret |= SDHCI_TRNS_AUTO_CMD23;
 447                         }
 448                 } else {
 449                         ret = readw(host->ioaddr + SDHCI_TRANSFER_MODE);
 450                 }
 451
 452                 return ret;
 453         }
 454
 455         return readw(host->ioaddr + reg);
 456 }
 457
 458 static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
 459 {
 460         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 461         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 462         u32 new_val = 0;
 463
 464         switch (reg) {
 465         case SDHCI_CLOCK_CONTROL:
 466                 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 467                 if (val & SDHCI_CLOCK_CARD_EN)
 468                         new_val |= ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
 469                 else
 470                         new_val &= ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
 471                 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
 472                 return;
 473         case SDHCI_HOST_CONTROL2:
 474                 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 475                 if (val & SDHCI_CTRL_VDD_180)
 476                         new_val |= ESDHC_VENDOR_SPEC_VSELECT;
 477                 else
 478                         new_val &= ~ESDHC_VENDOR_SPEC_VSELECT;
 479                 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
 480                 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
 481                         new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 482                         if (val & SDHCI_CTRL_TUNED_CLK) {
 483                                 new_val |= ESDHC_MIX_CTRL_SMPCLK_SEL;
 484                                 new_val |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 485                         } else {
 486                                 new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 487                                 new_val &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 488                         }
 489                         writel(new_val , host->ioaddr + ESDHC_MIX_CTRL);
 490                 } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
 491                         u32 v = readl(host->ioaddr + SDHCI_ACMD12_ERR);
 492                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 493                         if (val & SDHCI_CTRL_TUNED_CLK) {
 494                                 v |= ESDHC_MIX_CTRL_SMPCLK_SEL;
 495                         } else {
 496                                 v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 497                                 m &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
 498                                 m &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 499                         }
 500
 501                         if (val & SDHCI_CTRL_EXEC_TUNING) {
 502                                 v |= ESDHC_MIX_CTRL_EXE_TUNE;
 503                                 m |= ESDHC_MIX_CTRL_FBCLK_SEL;
 504                                 m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 505                         } else {
 506                                 v &= ~ESDHC_MIX_CTRL_EXE_TUNE;
 507                         }
 508
 509                         writel(v, host->ioaddr + SDHCI_ACMD12_ERR);
 510                         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 511                 }
 512                 return;
 513         case SDHCI_TRANSFER_MODE:
 514                 if ((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
 515                                 && (host->cmd->opcode == SD_IO_RW_EXTENDED)
 516                                 && (host->cmd->data->blocks > 1)
 517                                 && (host->cmd->data->flags & MMC_DATA_READ)) {
 518                         u32 v;
 519                         v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 520                         v |= ESDHC_VENDOR_SPEC_SDIO_QUIRK;
 521                         writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
 522                 }
 523
 524                 if (esdhc_is_usdhc(imx_data)) {
 525                         u32 wml;
 526                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 527                         /* Swap AC23 bit */
 528                         if (val & SDHCI_TRNS_AUTO_CMD23) {
 529                                 val &= ~SDHCI_TRNS_AUTO_CMD23;
 530                                 val |= ESDHC_MIX_CTRL_AC23EN;
 531                         }
 532                         m = val | (m & ~ESDHC_MIX_CTRL_SDHCI_MASK);
 533                         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 534
 535                         /* Set watermark levels for PIO access to maximum value
 536                          * (128 words) to accommodate full 512 bytes buffer.
 537                          * For DMA access restore the levels to default value.
 538                          */
 539                         m = readl(host->ioaddr + ESDHC_WTMK_LVL);
 540                         if (val & SDHCI_TRNS_DMA)
 541                                 wml = ESDHC_WTMK_LVL_WML_VAL_DEF;
 542                         else
 543                                 wml = ESDHC_WTMK_LVL_WML_VAL_MAX;
 544                         m &= ~(ESDHC_WTMK_LVL_RD_WML_MASK |
 545                                ESDHC_WTMK_LVL_WR_WML_MASK);
 546                         m |= (wml << ESDHC_WTMK_LVL_RD_WML_SHIFT) |
 547                              (wml << ESDHC_WTMK_LVL_WR_WML_SHIFT);
 548                         writel(m, host->ioaddr + ESDHC_WTMK_LVL);
 549                 } else {
 550                         /*
 551                          * Postpone this write, we must do it together with a
 552                          * command write that is down below.
 553                          */
 554                         imx_data->scratchpad = val;
 555                 }
 556                 return;
 557         case SDHCI_COMMAND:
 558                 if (host->cmd->opcode == MMC_STOP_TRANSMISSION)
 559                         val |= SDHCI_CMD_ABORTCMD;
 560
 561                 if ((host->cmd->opcode == MMC_SET_BLOCK_COUNT) &&
 562                     (imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
 563                         imx_data->multiblock_status = MULTIBLK_IN_PROCESS;
 564
 565                 if (esdhc_is_usdhc(imx_data))
 566                         writel(val << 16,
 567                                host->ioaddr + SDHCI_TRANSFER_MODE);
 568                 else
 569                         writel(val << 16 | imx_data->scratchpad,
 570                                host->ioaddr + SDHCI_TRANSFER_MODE);
 571                 return;
 572         case SDHCI_BLOCK_SIZE:
 573                 val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
 574                 break;
 575         }
 576         esdhc_clrset_le(host, 0xffff, val, reg);
 577 }
 578
 579 static u8 esdhc_readb_le(struct sdhci_host *host, int reg)
 580 {
 581         u8 ret;
 582         u32 val;
 583
 584         switch (reg) {
 585         case SDHCI_HOST_CONTROL:
 586                 val = readl(host->ioaddr + reg);
 587
 588                 ret = val & SDHCI_CTRL_LED;
 589                 ret |= (val >> 5) & SDHCI_CTRL_DMA_MASK;
 590                 ret |= (val & ESDHC_CTRL_4BITBUS);
 591                 ret |= (val & ESDHC_CTRL_8BITBUS) << 3;
 592                 return ret;
 593         }
 594
 595         return readb(host->ioaddr + reg);
 596 }
 597
 598 static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg)
 599 {
 600         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 601         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 602         u32 new_val = 0;
 603         u32 mask;
 604
 605         switch (reg) {
 606         case SDHCI_POWER_CONTROL:
 607                 /*
 608                  * FSL put some DMA bits here
 609                  * If your board has a regulator, code should be here
 610                  */
 611                 return;
 612         case SDHCI_HOST_CONTROL:
 613                 /* FSL messed up here, so we need to manually compose it. */
 614                 new_val = val & SDHCI_CTRL_LED;
 615                 /* ensure the endianness */
 616                 new_val |= ESDHC_HOST_CONTROL_LE;
 617                 /* bits 8&9 are reserved on mx25 */
 618                 if (!is_imx25_esdhc(imx_data)) {
 619                         /* DMA mode bits are shifted */
 620                         new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
 621                 }
 622
 623                 /*
 624                  * Do not touch buswidth bits here. This is done in
 625                  * esdhc_pltfm_bus_width.
 626                  * Do not touch the D3CD bit either which is used for the
 627                  * SDIO interrupt erratum workaround.
 628                  */
 629                 mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD);
 630
 631                 esdhc_clrset_le(host, mask, new_val, reg);
 632                 return;
 633         case SDHCI_SOFTWARE_RESET:
 634                 if (val & SDHCI_RESET_DATA)
 635                         new_val = readl(host->ioaddr + SDHCI_HOST_CONTROL);
 636                 break;
 637         }
 638         esdhc_clrset_le(host, 0xff, val, reg);
 639
 640         if (reg == SDHCI_SOFTWARE_RESET) {
 641                 if (val & SDHCI_RESET_ALL) {
 642                         /*
 643                          * The esdhc has a design violation to SDHC spec which
 644                          * tells that software reset should not affect card
 645                          * detection circuit. But esdhc clears its SYSCTL
 646                          * register bits [0..2] during the software reset. This
 647                          * will stop those clocks that card detection circuit
 648                          * relies on. To work around it, we turn the clocks on
 649                          * back to keep card detection circuit functional.
 650                          */
 651                         esdhc_clrset_le(host, 0x7, 0x7, ESDHC_SYSTEM_CONTROL);
 652                         /*
 653                          * The reset on usdhc fails to clear MIX_CTRL register.
 654                          * Do it manually here.
 655                          */
 656                         if (esdhc_is_usdhc(imx_data)) {
 657                                 /*
 658                                  * the tuning bits should be kept during reset
 659                                  */
 660                                 new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 661                                 writel(new_val & ESDHC_MIX_CTRL_TUNING_MASK,
 662                                                 host->ioaddr + ESDHC_MIX_CTRL);
 663                                 imx_data->is_ddr = 0;
 664                         }
 665                 } else if (val & SDHCI_RESET_DATA) {
 666                         /*
 667                          * The eSDHC DAT line software reset clears at least the
 668                          * data transfer width on i.MX25, so make sure that the
 669                          * Host Control register is unaffected.
 670                          */
 671                         esdhc_clrset_le(host, 0xff, new_val,
 672                                         SDHCI_HOST_CONTROL);
 673                 }
 674         }
 675 }
 676
 677 static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host)
 678 {
 679         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 680
 681         return pltfm_host->clock;
 682 }
 683
 684 static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 685 {
 686         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 687
 688         return pltfm_host->clock / 256 / 16;
 689 }
 690
 691 static inline void esdhc_pltfm_set_clock(struct sdhci_host *host,
 692                                          unsigned int clock)
 693 {
 694         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 695         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 696         unsigned int host_clock = pltfm_host->clock;
 697         int ddr_pre_div = imx_data->is_ddr ? 2 : 1;
 698         int pre_div = 1;
 699         int div = 1;
 700         u32 temp, val;
 701
 702         if (clock == 0) {
 703                 host->mmc->actual_clock = 0;
 704
 705                 if (esdhc_is_usdhc(imx_data)) {
 706                         val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 707                         writel(val & ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 708                                         host->ioaddr + ESDHC_VENDOR_SPEC);
 709                 }
 710                 return;
 711         }
 712
 713         /* For i.MX53 eSDHCv3, SYSCTL.SDCLKFS may not be set to 0. */
 714         if (is_imx53_esdhc(imx_data)) {
 715                 /*
 716                  * According to the i.MX53 reference manual, if DLLCTRL[10] can
 717                  * be set, then the controller is eSDHCv3, else it is eSDHCv2.
 718                  */
 719                 val = readl(host->ioaddr + ESDHC_DLL_CTRL);
 720                 writel(val | BIT(10), host->ioaddr + ESDHC_DLL_CTRL);
 721                 temp = readl(host->ioaddr + ESDHC_DLL_CTRL);
 722                 writel(val, host->ioaddr + ESDHC_DLL_CTRL);
 723                 if (temp & BIT(10))
 724                         pre_div = 2;
 725         }
 726
 727         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 728         temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 729                 | ESDHC_CLOCK_MASK);
 730         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 731
 732         while (host_clock / (16 * pre_div * ddr_pre_div) > clock &&
 733                         pre_div < 256)
 734                 pre_div *= 2;
 735
 736         while (host_clock / (div * pre_div * ddr_pre_div) > clock && div < 16)
 737                 div++;
 738
 739         host->mmc->actual_clock = host_clock / (div * pre_div * ddr_pre_div);
 740         dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
 741                 clock, host->mmc->actual_clock);
 742
 743         pre_div >>= 1;
 744         div--;
 745
 746         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 747         temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 748                 | (div << ESDHC_DIVIDER_SHIFT)
 749                 | (pre_div << ESDHC_PREDIV_SHIFT));
 750         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 751
 752         if (esdhc_is_usdhc(imx_data)) {
 753                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 754                 writel(val | ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 755                 host->ioaddr + ESDHC_VENDOR_SPEC);
 756         }
 757
 758         mdelay(1);
 759 }
 760
 761 static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
 762 {
 763         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 764         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 765         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 766
 767         switch (boarddata->wp_type) {
 768         case ESDHC_WP_GPIO:
 769                 return mmc_gpio_get_ro(host->mmc);
 770         case ESDHC_WP_CONTROLLER:
 771                 return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 772                                SDHCI_WRITE_PROTECT);
 773         case ESDHC_WP_NONE:
 774                 break;
 775         }
 776
 777         return -ENOSYS;
 778 }
 779
 780 static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
 781 {
 782         u32 ctrl;
 783
 784         switch (width) {
 785         case MMC_BUS_WIDTH_8:
 786                 ctrl = ESDHC_CTRL_8BITBUS;
 787                 break;
 788         case MMC_BUS_WIDTH_4:
 789                 ctrl = ESDHC_CTRL_4BITBUS;
 790                 break;
 791         default:
 792                 ctrl = 0;
 793                 break;
 794         }
 795
 796         esdhc_clrset_le(host, ESDHC_CTRL_BUSWIDTH_MASK, ctrl,
 797                         SDHCI_HOST_CONTROL);
 798 }
 799
 800 static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
 801 {
 802         u32 reg;
 803
 804         /* FIXME: delay a bit for card to be ready for next tuning due to errors */
 805         mdelay(1);
 806
 807         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
 808         reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
 809                         ESDHC_MIX_CTRL_FBCLK_SEL;
 810         writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
 811         writel(val << 8, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
 812         dev_dbg(mmc_dev(host->mmc),
 813                 "tuning with delay 0x%x ESDHC_TUNE_CTRL_STATUS 0x%x\n",
 814                         val, readl(host->ioaddr + ESDHC_TUNE_CTRL_STATUS));
 815 }
 816
 817 static void esdhc_post_tuning(struct sdhci_host *host)
 818 {
 819         u32 reg;
 820
 821         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
 822         reg &= ~ESDHC_MIX_CTRL_EXE_TUNE;
 823         reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 824         writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
 825 }
 826
 827 static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
 828 {
 829         int min, max, avg, ret;
 830
 831         /* find the mininum delay first which can pass tuning */
 832         min = ESDHC_TUNE_CTRL_MIN;
 833         while (min < ESDHC_TUNE_CTRL_MAX) {
 834                 esdhc_prepare_tuning(host, min);
 835                 if (!mmc_send_tuning(host->mmc, opcode, NULL))
 836                         break;
 837                 min += ESDHC_TUNE_CTRL_STEP;
 838         }
 839
 840         /* find the maxinum delay which can not pass tuning */
 841         max = min + ESDHC_TUNE_CTRL_STEP;
 842         while (max < ESDHC_TUNE_CTRL_MAX) {
 843                 esdhc_prepare_tuning(host, max);
 844                 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
 845                         max -= ESDHC_TUNE_CTRL_STEP;
 846                         break;
 847                 }
 848                 max += ESDHC_TUNE_CTRL_STEP;
 849         }
 850
 851         /* use average delay to get the best timing */
 852         avg = (min + max) / 2;
 853         esdhc_prepare_tuning(host, avg);
 854         ret = mmc_send_tuning(host->mmc, opcode, NULL);
 855         esdhc_post_tuning(host);
 856
 857         dev_dbg(mmc_dev(host->mmc), "tuning %s at 0x%x ret %d\n",
 858                 ret ? "failed" : "passed", avg, ret);
 859
 860         return ret;
 861 }
 862
 863 static int esdhc_change_pinstate(struct sdhci_host *host,
 864                                                 unsigned int uhs)
 865 {
 866         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 867         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 868         struct pinctrl_state *pinctrl;
 869
 870         dev_dbg(mmc_dev(host->mmc), "change pinctrl state for uhs %d\n", uhs);
 871
 872         if (IS_ERR(imx_data->pinctrl) ||
 873                 IS_ERR(imx_data->pins_default) ||
 874                 IS_ERR(imx_data->pins_100mhz) ||
 875                 IS_ERR(imx_data->pins_200mhz))
 876                 return -EINVAL;
 877
 878         switch (uhs) {
 879         case MMC_TIMING_UHS_SDR50:
 880         case MMC_TIMING_UHS_DDR50:
 881                 pinctrl = imx_data->pins_100mhz;
 882                 break;
 883         case MMC_TIMING_UHS_SDR104:
 884         case MMC_TIMING_MMC_HS200:
 885         case MMC_TIMING_MMC_HS400:
 886                 pinctrl = imx_data->pins_200mhz;
 887                 break;
 888         default:
 889                 /* back to default state for other legacy timing */
 890                 pinctrl = imx_data->pins_default;
 891         }
 892
 893         return pinctrl_select_state(imx_data->pinctrl, pinctrl);
 894 }
 895
 896 /*
 897  * For HS400 eMMC, there is a data_strobe line. This signal is generated
 898  * by the device and used for data output and CRC status response output
 899  * in HS400 mode. The frequency of this signal follows the frequency of
 900  * CLK generated by host. The host receives the data which is aligned to the
 901  * edge of data_strobe line. Due to the time delay between CLK line and
 902  * data_strobe line, if the delay time is larger than one clock cycle,
 903  * then CLK and data_strobe line will be misaligned, read error shows up.
 904  * So when the CLK is higher than 100MHz, each clock cycle is short enough,
 905  * host should configure the delay target.
 906  */
 907 static void esdhc_set_strobe_dll(struct sdhci_host *host)
 908 {
 909         u32 v;
 910
 911         if (host->mmc->actual_clock > ESDHC_STROBE_DLL_CLK_FREQ) {
 912                 /* disable clock before enabling strobe dll */
 913                 writel(readl(host->ioaddr + ESDHC_VENDOR_SPEC) &
 914                        ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 915                        host->ioaddr + ESDHC_VENDOR_SPEC);
 916
 917                 /* force a reset on strobe dll */
 918                 writel(ESDHC_STROBE_DLL_CTRL_RESET,
 919                         host->ioaddr + ESDHC_STROBE_DLL_CTRL);
 920                 /*
 921                  * enable strobe dll ctrl and adjust the delay target
 922                  * for the uSDHC loopback read clock
 923                  */
 924                 v = ESDHC_STROBE_DLL_CTRL_ENABLE |
 925                         (7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT);
 926                 writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL);
 927                 /* wait 1us to make sure strobe dll status register stable */
 928                 udelay(1);
 929                 v = readl(host->ioaddr + ESDHC_STROBE_DLL_STATUS);
 930                 if (!(v & ESDHC_STROBE_DLL_STS_REF_LOCK))
 931                         dev_warn(mmc_dev(host->mmc),
 932                                 "warning! HS400 strobe DLL status REF not lock!\n");
 933                 if (!(v & ESDHC_STROBE_DLL_STS_SLV_LOCK))
 934                         dev_warn(mmc_dev(host->mmc),
 935                                 "warning! HS400 strobe DLL status SLV not lock!\n");
 936         }
 937 }
 938
 939 static void esdhc_reset_tuning(struct sdhci_host *host)
 940 {
 941         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 942         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 943         u32 ctrl;
 944
 945         /* Reset the tuning circuit */
 946         if (esdhc_is_usdhc(imx_data)) {
 947                 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
 948                         ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
 949                         ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 950                         ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
 951                         writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
 952                         writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
 953                 } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
 954                         ctrl = readl(host->ioaddr + SDHCI_ACMD12_ERR);
 955                         ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 956                         writel(ctrl, host->ioaddr + SDHCI_ACMD12_ERR);
 957                 }
 958         }
 959 }
 960
 961 static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
 962 {
 963         u32 m;
 964         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 965         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 966         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 967
 968         /* disable ddr mode and disable HS400 mode */
 969         m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 970         m &= ~(ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN);
 971         imx_data->is_ddr = 0;
 972
 973         switch (timing) {
 974         case MMC_TIMING_UHS_SDR12:
 975         case MMC_TIMING_UHS_SDR25:
 976         case MMC_TIMING_UHS_SDR50:
 977         case MMC_TIMING_UHS_SDR104:
 978         case MMC_TIMING_MMC_HS200:
 979                 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 980                 break;
 981         case MMC_TIMING_UHS_DDR50:
 982         case MMC_TIMING_MMC_DDR52:
 983                 m |= ESDHC_MIX_CTRL_DDREN;
 984                 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 985                 imx_data->is_ddr = 1;
 986                 if (boarddata->delay_line) {
 987                         u32 v;
 988                         v = boarddata->delay_line <<
 989                                 ESDHC_DLL_OVERRIDE_VAL_SHIFT |
 990                                 (1 << ESDHC_DLL_OVERRIDE_EN_SHIFT);
 991                         if (is_imx53_esdhc(imx_data))
 992                                 v <<= 1;
 993                         writel(v, host->ioaddr + ESDHC_DLL_CTRL);
 994                 }
 995                 break;
 996         case MMC_TIMING_MMC_HS400:
 997                 m |= ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN;
 998                 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 999                 imx_data->is_ddr = 1;
1000                 /* update clock after enable DDR for strobe DLL lock */
1001                 host->ops->set_clock(host, host->clock);
1002                 esdhc_set_strobe_dll(host);
1003                 break;
1004         case MMC_TIMING_LEGACY:
1005         default:
1006                 esdhc_reset_tuning(host);
1007                 break;
1008         }
1009
1010         esdhc_change_pinstate(host, timing);
1011 }
1012
1013 static void esdhc_reset(struct sdhci_host *host, u8 mask)
1014 {
1015         sdhci_reset(host, mask);
1016
1017         sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
1018         sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
1019 }
1020
1021 static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host)
1022 {
1023         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1024         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1025
1026         /* Doc Erratum: the uSDHC actual maximum timeout count is 1 << 29 */
1027         return esdhc_is_usdhc(imx_data) ? 1 << 29 : 1 << 27;
1028 }
1029
1030 static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
1031 {
1032         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1033         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1034
1035         /* use maximum timeout counter */
1036         esdhc_clrset_le(host, ESDHC_SYS_CTRL_DTOCV_MASK,
1037                         esdhc_is_usdhc(imx_data) ? 0xF : 0xE,
1038                         SDHCI_TIMEOUT_CONTROL);
1039 }
1040
1041 static struct sdhci_ops sdhci_esdhc_ops = {
1042         .read_l = esdhc_readl_le,
1043         .read_w = esdhc_readw_le,
1044         .read_b = esdhc_readb_le,
1045         .write_l = esdhc_writel_le,
1046         .write_w = esdhc_writew_le,
1047         .write_b = esdhc_writeb_le,
1048         .set_clock = esdhc_pltfm_set_clock,
1049         .get_max_clock = esdhc_pltfm_get_max_clock,
1050         .get_min_clock = esdhc_pltfm_get_min_clock,
1051         .get_max_timeout_count = esdhc_get_max_timeout_count,
1052         .get_ro = esdhc_pltfm_get_ro,
1053         .set_timeout = esdhc_set_timeout,
1054         .set_bus_width = esdhc_pltfm_set_bus_width,
1055         .set_uhs_signaling = esdhc_set_uhs_signaling,
1056         .reset = esdhc_reset,
1057 };
1058
1059 static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
1060         .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT
1061                         | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
1062                         | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC
1063                         | SDHCI_QUIRK_BROKEN_CARD_DETECTION,
1064         .ops = &sdhci_esdhc_ops,
1065 };
1066
1067 static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
1068 {
1069         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1070         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1071         int tmp;
1072
1073         if (esdhc_is_usdhc(imx_data)) {
1074                 /*
1075                  * The imx6q ROM code will change the default watermark
1076                  * level setting to something insane.  Change it back here.
1077                  */
1078                 writel(ESDHC_WTMK_DEFAULT_VAL, host->ioaddr + ESDHC_WTMK_LVL);
1079
1080                 /*
1081                  * ROM code will change the bit burst_length_enable setting
1082                  * to zero if this usdhc is chosen to boot system. Change
1083                  * it back here, otherwise it will impact the performance a
1084                  * lot. This bit is used to enable/disable the burst length
1085                  * for the external AHB2AXI bridge. It's useful especially
1086                  * for INCR transfer because without burst length indicator,
1087                  * the AHB2AXI bridge does not know the burst length in
1088                  * advance. And without burst length indicator, AHB INCR
1089                  * transfer can only be converted to singles on the AXI side.
1090                  */
1091                 writel(readl(host->ioaddr + SDHCI_HOST_CONTROL)
1092                         | ESDHC_BURST_LEN_EN_INCR,
1093                         host->ioaddr + SDHCI_HOST_CONTROL);
1094                 /*
1095                 * erratum ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL
1096                 * TO1.1, it's harmless for MX6SL
1097                 */
1098                 writel(readl(host->ioaddr + 0x6c) | BIT(7),
1099                         host->ioaddr + 0x6c);
1100
1101                 /* disable DLL_CTRL delay line settings */
1102                 writel(0x0, host->ioaddr + ESDHC_DLL_CTRL);
1103
1104                 if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
1105                         tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL);
1106                         tmp |= ESDHC_STD_TUNING_EN |
1107                                 ESDHC_TUNING_START_TAP_DEFAULT;
1108                         if (imx_data->boarddata.tuning_start_tap) {
1109                                 tmp &= ~ESDHC_TUNING_START_TAP_MASK;
1110                                 tmp |= imx_data->boarddata.tuning_start_tap;
1111                         }
1112
1113                         if (imx_data->boarddata.tuning_step) {
1114                                 tmp &= ~ESDHC_TUNING_STEP_MASK;
1115                                 tmp |= imx_data->boarddata.tuning_step
1116                                         << ESDHC_TUNING_STEP_SHIFT;
1117                         }
1118                         writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
1119                 }
1120         }
1121 }
1122
1123 #ifdef CONFIG_OF
1124 static int
1125 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
1126                          struct sdhci_host *host,
1127                          struct pltfm_imx_data *imx_data)
1128 {
1129         struct device_node *np = pdev->dev.of_node;
1130         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
1131         int ret;
1132
1133         if (of_get_property(np, "fsl,wp-controller", NULL))
1134                 boarddata->wp_type = ESDHC_WP_CONTROLLER;
1135
1136         boarddata->wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
1137         if (gpio_is_valid(boarddata->wp_gpio))
1138                 boarddata->wp_type = ESDHC_WP_GPIO;
1139
1140         of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step);
1141         of_property_read_u32(np, "fsl,tuning-start-tap",
1142                              &boarddata->tuning_start_tap);
1143
1144         if (of_find_property(np, "no-1-8-v", NULL))
1145                 boarddata->support_vsel = false;
1146         else
1147                 boarddata->support_vsel = true;
1148
1149         if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line))
1150                 boarddata->delay_line = 0;
1151
1152         mmc_of_parse_voltage(np, &host->ocr_mask);
1153
1154         /* sdr50 and sdr104 need work on 1.8v signal voltage */
1155         if ((boarddata->support_vsel) && esdhc_is_usdhc(imx_data) &&
1156             !IS_ERR(imx_data->pins_default)) {
1157                 imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
1158                                                 ESDHC_PINCTRL_STATE_100MHZ);
1159                 imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,
1160                                                 ESDHC_PINCTRL_STATE_200MHZ);
1161                 if (IS_ERR(imx_data->pins_100mhz) ||
1162                                 IS_ERR(imx_data->pins_200mhz)) {
1163                         dev_warn(mmc_dev(host->mmc),
1164                                 "could not get ultra high speed state, work on normal mode\n");
1165                         /*
1166                          * fall back to not supporting uhs by specifying no
1167                          * 1.8v quirk
1168                          */
1169                         host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1170                 }
1171         } else {
1172                 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1173         }
1174
1175         /* call to generic mmc_of_parse to support additional capabilities */
1176         ret = mmc_of_parse(host->mmc);
1177         if (ret)
1178                 return ret;
1179
1180         if (mmc_gpio_get_cd(host->mmc) >= 0)
1181                 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1182
1183         return 0;
1184 }
1185 #else
1186 static inline int
1187 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
1188                          struct sdhci_host *host,
1189                          struct pltfm_imx_data *imx_data)
1190 {
1191         return -ENODEV;
1192 }
1193 #endif
1194
1195 static int sdhci_esdhc_imx_probe_nondt(struct platform_device *pdev,
1196                          struct sdhci_host *host,
1197                          struct pltfm_imx_data *imx_data)
1198 {
1199         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
1200         int err;
1201
1202         if (!host->mmc->parent->platform_data) {
1203                 dev_err(mmc_dev(host->mmc), "no board data!\n");
1204                 return -EINVAL;
1205         }
1206
1207         imx_data->boarddata = *((struct esdhc_platform_data *)
1208                                 host->mmc->parent->platform_data);
1209         /* write_protect */
1210         if (boarddata->wp_type == ESDHC_WP_GPIO) {
1211                 err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio);
1212                 if (err) {
1213                         dev_err(mmc_dev(host->mmc),
1214                                 "failed to request write-protect gpio!\n");
1215                         return err;
1216                 }
1217                 host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
1218         }
1219
1220         /* card_detect */
1221         switch (boarddata->cd_type) {
1222         case ESDHC_CD_GPIO:
1223                 err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0);
1224                 if (err) {
1225                         dev_err(mmc_dev(host->mmc),
1226                                 "failed to request card-detect gpio!\n");
1227                         return err;
1228                 }
1229                 /* fall through */
1230
1231         case ESDHC_CD_CONTROLLER:
1232                 /* we have a working card_detect back */
1233                 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1234                 break;
1235
1236         case ESDHC_CD_PERMANENT:
1237                 host->mmc->caps |= MMC_CAP_NONREMOVABLE;
1238                 break;
1239
1240         case ESDHC_CD_NONE:
1241                 break;
1242         }
1243
1244         switch (boarddata->max_bus_width) {
1245         case 8:
1246                 host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA;
1247                 break;
1248         case 4:
1249                 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
1250                 break;
1251         case 1:
1252         default:
1253                 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
1254                 break;
1255         }
1256
1257         return 0;
1258 }
1259
1260 static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
1261 {
1262         const struct of_device_id *of_id =
1263                         of_match_device(imx_esdhc_dt_ids, &pdev->dev);
1264         struct sdhci_pltfm_host *pltfm_host;
1265         struct sdhci_host *host;
1266         int err;
1267         struct pltfm_imx_data *imx_data;
1268
1269         host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata,
1270                                 sizeof(*imx_data));
1271         if (IS_ERR(host))
1272                 return PTR_ERR(host);
1273
1274         pltfm_host = sdhci_priv(host);
1275
1276         imx_data = sdhci_pltfm_priv(pltfm_host);
1277
1278         imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *)
1279                                                   pdev->id_entry->driver_data;
1280
1281         imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
1282         if (IS_ERR(imx_data->clk_ipg)) {
1283                 err = PTR_ERR(imx_data->clk_ipg);
1284                 goto free_sdhci;
1285         }
1286
1287         imx_data->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
1288         if (IS_ERR(imx_data->clk_ahb)) {
1289                 err = PTR_ERR(imx_data->clk_ahb);
1290                 goto free_sdhci;
1291         }
1292
1293         imx_data->clk_per = devm_clk_get(&pdev->dev, "per");
1294         if (IS_ERR(imx_data->clk_per)) {
1295                 err = PTR_ERR(imx_data->clk_per);
1296                 goto free_sdhci;
1297         }
1298
1299         pltfm_host->clk = imx_data->clk_per;
1300         pltfm_host->clock = clk_get_rate(pltfm_host->clk);
1301         err = clk_prepare_enable(imx_data->clk_per);
1302         if (err)
1303                 goto free_sdhci;
1304         err = clk_prepare_enable(imx_data->clk_ipg);
1305         if (err)
1306                 goto disable_per_clk;
1307         err = clk_prepare_enable(imx_data->clk_ahb);
1308         if (err)
1309                 goto disable_ipg_clk;
1310
1311         imx_data->pinctrl = devm_pinctrl_get(&pdev->dev);
1312         if (IS_ERR(imx_data->pinctrl)) {
1313                 err = PTR_ERR(imx_data->pinctrl);
1314                 goto disable_ahb_clk;
1315         }
1316
1317         imx_data->pins_default = pinctrl_lookup_state(imx_data->pinctrl,
1318                                                 PINCTRL_STATE_DEFAULT);
1319         if (IS_ERR(imx_data->pins_default))
1320                 dev_warn(mmc_dev(host->mmc), "could not get default state\n");
1321
1322         if (esdhc_is_usdhc(imx_data)) {
1323                 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
1324                 host->mmc->caps |= MMC_CAP_1_8V_DDR;
1325                 if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
1326                         host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
1327
1328                 /* clear tuning bits in case ROM has set it already */
1329                 writel(0x0, host->ioaddr + ESDHC_MIX_CTRL);
1330                 writel(0x0, host->ioaddr + SDHCI_ACMD12_ERR);
1331                 writel(0x0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
1332         }
1333
1334         if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
1335                 sdhci_esdhc_ops.platform_execute_tuning =
1336                                         esdhc_executing_tuning;
1337
1338         if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536)
1339                 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1340
1341         if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
1342                 host->quirks2 |= SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400;
1343
1344         if (of_id)
1345                 err = sdhci_esdhc_imx_probe_dt(pdev, host, imx_data);
1346         else
1347                 err = sdhci_esdhc_imx_probe_nondt(pdev, host, imx_data);
1348         if (err)
1349                 goto disable_ahb_clk;
1350
1351         sdhci_esdhc_imx_hwinit(host);
1352
1353         err = sdhci_add_host(host);
1354         if (err)
1355                 goto disable_ahb_clk;
1356
1357         pm_runtime_set_active(&pdev->dev);
1358         pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
1359         pm_runtime_use_autosuspend(&pdev->dev);
1360         pm_suspend_ignore_children(&pdev->dev, 1);
1361         pm_runtime_enable(&pdev->dev);
1362
1363         return 0;
1364
1365 disable_ahb_clk:
1366         clk_disable_unprepare(imx_data->clk_ahb);
1367 disable_ipg_clk:
1368         clk_disable_unprepare(imx_data->clk_ipg);
1369 disable_per_clk:
1370         clk_disable_unprepare(imx_data->clk_per);
1371 free_sdhci:
1372         sdhci_pltfm_free(pdev);
1373         return err;
1374 }
1375
1376 static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
1377 {
1378         struct sdhci_host *host = platform_get_drvdata(pdev);
1379         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1380         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1381         int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
1382
1383         pm_runtime_get_sync(&pdev->dev);
1384         pm_runtime_disable(&pdev->dev);
1385         pm_runtime_put_noidle(&pdev->dev);
1386
1387         sdhci_remove_host(host, dead);
1388
1389         clk_disable_unprepare(imx_data->clk_per);
1390         clk_disable_unprepare(imx_data->clk_ipg);
1391         clk_disable_unprepare(imx_data->clk_ahb);
1392
1393         sdhci_pltfm_free(pdev);
1394
1395         return 0;
1396 }
1397
1398 #ifdef CONFIG_PM_SLEEP
1399 static int sdhci_esdhc_suspend(struct device *dev)
1400 {
1401         struct sdhci_host *host = dev_get_drvdata(dev);
1402
1403         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
1404                 mmc_retune_needed(host->mmc);
1405
1406         return sdhci_suspend_host(host);
1407 }
1408
1409 static int sdhci_esdhc_resume(struct device *dev)
1410 {
1411         struct sdhci_host *host = dev_get_drvdata(dev);
1412
1413         /* re-initialize hw state in case it's lost in low power mode */
1414         sdhci_esdhc_imx_hwinit(host);
1415
1416         return sdhci_resume_host(host);
1417 }
1418 #endif
1419
1420 #ifdef CONFIG_PM
1421 static int sdhci_esdhc_runtime_suspend(struct device *dev)
1422 {
1423         struct sdhci_host *host = dev_get_drvdata(dev);
1424         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1425         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1426         int ret;
1427
1428         ret = sdhci_runtime_suspend_host(host);
1429         if (ret)
1430                 return ret;
1431
1432         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
1433                 mmc_retune_needed(host->mmc);
1434
1435         if (!sdhci_sdio_irq_enabled(host)) {
1436                 imx_data->actual_clock = host->mmc->actual_clock;
1437                 esdhc_pltfm_set_clock(host, 0);
1438                 clk_disable_unprepare(imx_data->clk_per);
1439                 clk_disable_unprepare(imx_data->clk_ipg);
1440         }
1441         clk_disable_unprepare(imx_data->clk_ahb);
1442
1443         return ret;
1444 }
1445
1446 static int sdhci_esdhc_runtime_resume(struct device *dev)
1447 {
1448         struct sdhci_host *host = dev_get_drvdata(dev);
1449         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1450         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1451         int err;
1452
1453         err = clk_prepare_enable(imx_data->clk_ahb);
1454         if (err)
1455                 return err;
1456
1457         if (!sdhci_sdio_irq_enabled(host)) {
1458                 err = clk_prepare_enable(imx_data->clk_per);
1459                 if (err)
1460                         goto disable_ahb_clk;
1461                 err = clk_prepare_enable(imx_data->clk_ipg);
1462                 if (err)
1463                         goto disable_per_clk;
1464                 esdhc_pltfm_set_clock(host, imx_data->actual_clock);
1465         }
1466
1467         err = sdhci_runtime_resume_host(host);
1468         if (err)
1469                 goto disable_ipg_clk;
1470
1471         return 0;
1472
1473 disable_ipg_clk:
1474         if (!sdhci_sdio_irq_enabled(host))
1475                 clk_disable_unprepare(imx_data->clk_ipg);
1476 disable_per_clk:
1477         if (!sdhci_sdio_irq_enabled(host))
1478                 clk_disable_unprepare(imx_data->clk_per);
1479 disable_ahb_clk:
1480         clk_disable_unprepare(imx_data->clk_ahb);
1481         return err;
1482 }
1483 #endif
1484
1485 static const struct dev_pm_ops sdhci_esdhc_pmops = {
1486         SET_SYSTEM_SLEEP_PM_OPS(sdhci_esdhc_suspend, sdhci_esdhc_resume)
1487         SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend,
1488                                 sdhci_esdhc_runtime_resume, NULL)
1489 };
1490
1491 static struct platform_driver sdhci_esdhc_imx_driver = {
1492         .driver         = {
1493                 .name   = "sdhci-esdhc-imx",
1494                 .of_match_table = imx_esdhc_dt_ids,
1495                 .pm     = &sdhci_esdhc_pmops,
1496         },
1497         .id_table       = imx_esdhc_devtype,
1498         .probe          = sdhci_esdhc_imx_probe,
1499         .remove         = sdhci_esdhc_imx_remove,
1500 };
1501
1502 module_platform_driver(sdhci_esdhc_imx_driver);
1503
1504 MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
1505 MODULE_AUTHOR("Wolfram Sang <[email protected]>");
1506 MODULE_LICENSE("GPL v2");