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

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This source file includes following definitions.
is_imx25_esdhc
is_imx53_esdhc
is_imx6q_usdhc
esdhc_is_usdhc
esdhc_clrset_le
esdhc_readl_le
esdhc_writel_le
esdhc_readw_le
esdhc_writew_le
esdhc_readb_le
esdhc_writeb_le
esdhc_pltfm_get_max_clock
esdhc_pltfm_get_min_clock
esdhc_pltfm_set_clock
esdhc_pltfm_get_ro
esdhc_pltfm_set_bus_width
usdhc_execute_tuning
esdhc_prepare_tuning
esdhc_post_tuning
esdhc_executing_tuning
esdhc_hs400_enhanced_strobe
esdhc_change_pinstate
esdhc_set_strobe_dll
esdhc_reset_tuning
esdhc_set_uhs_signaling
esdhc_reset
esdhc_get_max_timeout_count
esdhc_set_timeout
esdhc_cqhci_irq
sdhci_esdhc_imx_hwinit
esdhc_cqe_enable
esdhc_sdhci_dumpregs
sdhci_esdhc_imx_probe_dt
sdhci_esdhc_imx_probe_dt
sdhci_esdhc_imx_probe_nondt
sdhci_esdhc_imx_probe
sdhci_esdhc_imx_remove
sdhci_esdhc_suspend
sdhci_esdhc_resume
sdhci_esdhc_runtime_suspend
sdhci_esdhc_runtime_resume
   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Freescale eSDHC i.MX controller driver for the platform bus.
   4  *
   5  * derived from the OF-version.
   6  *
   7  * Copyright (c) 2010 Pengutronix e.K.
   8  *   Author: Wolfram Sang <kernel@pengutronix.de>
   9  */
  10 
  11 #include <linux/io.h>
  12 #include <linux/delay.h>
  13 #include <linux/err.h>
  14 #include <linux/clk.h>
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/pm_qos.h>
  18 #include <linux/mmc/host.h>
  19 #include <linux/mmc/mmc.h>
  20 #include <linux/mmc/sdio.h>
  21 #include <linux/mmc/slot-gpio.h>
  22 #include <linux/of.h>
  23 #include <linux/of_device.h>
  24 #include <linux/pinctrl/consumer.h>
  25 #include <linux/platform_data/mmc-esdhc-imx.h>
  26 #include <linux/pm_runtime.h>
  27 #include "sdhci-pltfm.h"
  28 #include "sdhci-esdhc.h"
  29 #include "cqhci.h"
  30 
  31 #define ESDHC_SYS_CTRL_DTOCV_MASK       0x0f
  32 #define ESDHC_CTRL_D3CD                 0x08
  33 #define ESDHC_BURST_LEN_EN_INCR         (1 << 27)
  34 /* VENDOR SPEC register */
  35 #define ESDHC_VENDOR_SPEC               0xc0
  36 #define  ESDHC_VENDOR_SPEC_SDIO_QUIRK   (1 << 1)
  37 #define  ESDHC_VENDOR_SPEC_VSELECT      (1 << 1)
  38 #define  ESDHC_VENDOR_SPEC_FRC_SDCLK_ON (1 << 8)
  39 #define ESDHC_WTMK_LVL                  0x44
  40 #define  ESDHC_WTMK_DEFAULT_VAL         0x10401040
  41 #define  ESDHC_WTMK_LVL_RD_WML_MASK     0x000000FF
  42 #define  ESDHC_WTMK_LVL_RD_WML_SHIFT    0
  43 #define  ESDHC_WTMK_LVL_WR_WML_MASK     0x00FF0000
  44 #define  ESDHC_WTMK_LVL_WR_WML_SHIFT    16
  45 #define  ESDHC_WTMK_LVL_WML_VAL_DEF     64
  46 #define  ESDHC_WTMK_LVL_WML_VAL_MAX     128
  47 #define ESDHC_MIX_CTRL                  0x48
  48 #define  ESDHC_MIX_CTRL_DDREN           (1 << 3)
  49 #define  ESDHC_MIX_CTRL_AC23EN          (1 << 7)
  50 #define  ESDHC_MIX_CTRL_EXE_TUNE        (1 << 22)
  51 #define  ESDHC_MIX_CTRL_SMPCLK_SEL      (1 << 23)
  52 #define  ESDHC_MIX_CTRL_AUTO_TUNE_EN    (1 << 24)
  53 #define  ESDHC_MIX_CTRL_FBCLK_SEL       (1 << 25)
  54 #define  ESDHC_MIX_CTRL_HS400_EN        (1 << 26)
  55 #define  ESDHC_MIX_CTRL_HS400_ES_EN     (1 << 27)
  56 /* Bits 3 and 6 are not SDHCI standard definitions */
  57 #define  ESDHC_MIX_CTRL_SDHCI_MASK      0xb7
  58 /* Tuning bits */
  59 #define  ESDHC_MIX_CTRL_TUNING_MASK     0x03c00000
  60 
  61 /* dll control register */
  62 #define ESDHC_DLL_CTRL                  0x60
  63 #define ESDHC_DLL_OVERRIDE_VAL_SHIFT    9
  64 #define ESDHC_DLL_OVERRIDE_EN_SHIFT     8
  65 
  66 /* tune control register */
  67 #define ESDHC_TUNE_CTRL_STATUS          0x68
  68 #define  ESDHC_TUNE_CTRL_STEP           1
  69 #define  ESDHC_TUNE_CTRL_MIN            0
  70 #define  ESDHC_TUNE_CTRL_MAX            ((1 << 7) - 1)
  71 
  72 /* strobe dll register */
  73 #define ESDHC_STROBE_DLL_CTRL           0x70
  74 #define ESDHC_STROBE_DLL_CTRL_ENABLE    (1 << 0)
  75 #define ESDHC_STROBE_DLL_CTRL_RESET     (1 << 1)
  76 #define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT      3
  77 #define ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT    (4 << 20)
  78 
  79 #define ESDHC_STROBE_DLL_STATUS         0x74
  80 #define ESDHC_STROBE_DLL_STS_REF_LOCK   (1 << 1)
  81 #define ESDHC_STROBE_DLL_STS_SLV_LOCK   0x1
  82 
  83 #define ESDHC_VEND_SPEC2                0xc8
  84 #define ESDHC_VEND_SPEC2_EN_BUSY_IRQ    (1 << 8)
  85 
  86 #define ESDHC_TUNING_CTRL               0xcc
  87 #define ESDHC_STD_TUNING_EN             (1 << 24)
  88 /* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
  89 #define ESDHC_TUNING_START_TAP_DEFAULT  0x1
  90 #define ESDHC_TUNING_START_TAP_MASK     0xff
  91 #define ESDHC_TUNING_STEP_MASK          0x00070000
  92 #define ESDHC_TUNING_STEP_SHIFT         16
  93 
  94 /* pinctrl state */
  95 #define ESDHC_PINCTRL_STATE_100MHZ      "state_100mhz"
  96 #define ESDHC_PINCTRL_STATE_200MHZ      "state_200mhz"
  97 
  98 /*
  99  * Our interpretation of the SDHCI_HOST_CONTROL register
 100  */
 101 #define ESDHC_CTRL_4BITBUS              (0x1 << 1)
 102 #define ESDHC_CTRL_8BITBUS              (0x2 << 1)
 103 #define ESDHC_CTRL_BUSWIDTH_MASK        (0x3 << 1)
 104 
 105 /*
 106  * There is an INT DMA ERR mismatch between eSDHC and STD SDHC SPEC:
 107  * Bit25 is used in STD SPEC, and is reserved in fsl eSDHC design,
 108  * but bit28 is used as the INT DMA ERR in fsl eSDHC design.
 109  * Define this macro DMA error INT for fsl eSDHC
 110  */
 111 #define ESDHC_INT_VENDOR_SPEC_DMA_ERR   (1 << 28)
 112 
 113 /* the address offset of CQHCI */
 114 #define ESDHC_CQHCI_ADDR_OFFSET         0x100
 115 
 116 /*
 117  * The CMDTYPE of the CMD register (offset 0xE) should be set to
 118  * "11" when the STOP CMD12 is issued on imx53 to abort one
 119  * open ended multi-blk IO. Otherwise the TC INT wouldn't
 120  * be generated.
 121  * In exact block transfer, the controller doesn't complete the
 122  * operations automatically as required at the end of the
 123  * transfer and remains on hold if the abort command is not sent.
 124  * As a result, the TC flag is not asserted and SW received timeout
 125  * exception. Bit1 of Vendor Spec register is used to fix it.
 126  */
 127 #define ESDHC_FLAG_MULTIBLK_NO_INT      BIT(1)
 128 /*
 129  * The flag tells that the ESDHC controller is an USDHC block that is
 130  * integrated on the i.MX6 series.
 131  */
 132 #define ESDHC_FLAG_USDHC                BIT(3)
 133 /* The IP supports manual tuning process */
 134 #define ESDHC_FLAG_MAN_TUNING           BIT(4)
 135 /* The IP supports standard tuning process */
 136 #define ESDHC_FLAG_STD_TUNING           BIT(5)
 137 /* The IP has SDHCI_CAPABILITIES_1 register */
 138 #define ESDHC_FLAG_HAVE_CAP1            BIT(6)
 139 /*
 140  * The IP has erratum ERR004536
 141  * uSDHC: ADMA Length Mismatch Error occurs if the AHB read access is slow,
 142  * when reading data from the card
 143  * This flag is also set for i.MX25 and i.MX35 in order to get
 144  * SDHCI_QUIRK_BROKEN_ADMA, but for different reasons (ADMA capability bits).
 145  */
 146 #define ESDHC_FLAG_ERR004536            BIT(7)
 147 /* The IP supports HS200 mode */
 148 #define ESDHC_FLAG_HS200                BIT(8)
 149 /* The IP supports HS400 mode */
 150 #define ESDHC_FLAG_HS400                BIT(9)
 151 /*
 152  * The IP has errata ERR010450
 153  * uSDHC: Due to the I/O timing limit, for SDR mode, SD card clock can't
 154  * exceed 150MHz, for DDR mode, SD card clock can't exceed 45MHz.
 155  */
 156 #define ESDHC_FLAG_ERR010450            BIT(10)
 157 /* The IP supports HS400ES mode */
 158 #define ESDHC_FLAG_HS400_ES             BIT(11)
 159 /* The IP has Host Controller Interface for Command Queuing */
 160 #define ESDHC_FLAG_CQHCI                BIT(12)
 161 /* need request pmqos during low power */
 162 #define ESDHC_FLAG_PMQOS                BIT(13)
 163 
 164 struct esdhc_soc_data {
 165         u32 flags;
 166 };
 167 
 168 static const struct esdhc_soc_data esdhc_imx25_data = {
 169         .flags = ESDHC_FLAG_ERR004536,
 170 };
 171 
 172 static const struct esdhc_soc_data esdhc_imx35_data = {
 173         .flags = ESDHC_FLAG_ERR004536,
 174 };
 175 
 176 static const struct esdhc_soc_data esdhc_imx51_data = {
 177         .flags = 0,
 178 };
 179 
 180 static const struct esdhc_soc_data esdhc_imx53_data = {
 181         .flags = ESDHC_FLAG_MULTIBLK_NO_INT,
 182 };
 183 
 184 static const struct esdhc_soc_data usdhc_imx6q_data = {
 185         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING,
 186 };
 187 
 188 static const struct esdhc_soc_data usdhc_imx6sl_data = {
 189         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 190                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_ERR004536
 191                         | ESDHC_FLAG_HS200,
 192 };
 193 
 194 static const struct esdhc_soc_data usdhc_imx6sx_data = {
 195         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 196                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200,
 197 };
 198 
 199 static const struct esdhc_soc_data usdhc_imx6ull_data = {
 200         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 201                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
 202                         | ESDHC_FLAG_ERR010450,
 203 };
 204 
 205 static const struct esdhc_soc_data usdhc_imx7d_data = {
 206         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 207                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
 208                         | ESDHC_FLAG_HS400,
 209 };
 210 
 211 static struct esdhc_soc_data usdhc_imx7ulp_data = {
 212         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 213                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
 214                         | ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400,
 215 };
 216 
 217 static struct esdhc_soc_data usdhc_imx8qxp_data = {
 218         .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
 219                         | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
 220                         | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES
 221                         | ESDHC_FLAG_CQHCI,
 222 };
 223 
 224 struct pltfm_imx_data {
 225         u32 scratchpad;
 226         struct pinctrl *pinctrl;
 227         struct pinctrl_state *pins_default;
 228         struct pinctrl_state *pins_100mhz;
 229         struct pinctrl_state *pins_200mhz;
 230         const struct esdhc_soc_data *socdata;
 231         struct esdhc_platform_data boarddata;
 232         struct clk *clk_ipg;
 233         struct clk *clk_ahb;
 234         struct clk *clk_per;
 235         unsigned int actual_clock;
 236         enum {
 237                 NO_CMD_PENDING,      /* no multiblock command pending */
 238                 MULTIBLK_IN_PROCESS, /* exact multiblock cmd in process */
 239                 WAIT_FOR_INT,        /* sent CMD12, waiting for response INT */
 240         } multiblock_status;
 241         u32 is_ddr;
 242         struct pm_qos_request pm_qos_req;
 243 };
 244 
 245 static const struct platform_device_id imx_esdhc_devtype[] = {
 246         {
 247                 .name = "sdhci-esdhc-imx25",
 248                 .driver_data = (kernel_ulong_t) &esdhc_imx25_data,
 249         }, {
 250                 .name = "sdhci-esdhc-imx35",
 251                 .driver_data = (kernel_ulong_t) &esdhc_imx35_data,
 252         }, {
 253                 .name = "sdhci-esdhc-imx51",
 254                 .driver_data = (kernel_ulong_t) &esdhc_imx51_data,
 255         }, {
 256                 /* sentinel */
 257         }
 258 };
 259 MODULE_DEVICE_TABLE(platform, imx_esdhc_devtype);
 260 
 261 static const struct of_device_id imx_esdhc_dt_ids[] = {
 262         { .compatible = "fsl,imx25-esdhc", .data = &esdhc_imx25_data, },
 263         { .compatible = "fsl,imx35-esdhc", .data = &esdhc_imx35_data, },
 264         { .compatible = "fsl,imx51-esdhc", .data = &esdhc_imx51_data, },
 265         { .compatible = "fsl,imx53-esdhc", .data = &esdhc_imx53_data, },
 266         { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, },
 267         { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, },
 268         { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
 269         { .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, },
 270         { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, },
 271         { .compatible = "fsl,imx7ulp-usdhc", .data = &usdhc_imx7ulp_data, },
 272         { .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, },
 273         { /* sentinel */ }
 274 };
 275 MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
 276 
 277 static inline int is_imx25_esdhc(struct pltfm_imx_data *data)
 278 {
 279         return data->socdata == &esdhc_imx25_data;
 280 }
 281 
 282 static inline int is_imx53_esdhc(struct pltfm_imx_data *data)
 283 {
 284         return data->socdata == &esdhc_imx53_data;
 285 }
 286 
 287 static inline int is_imx6q_usdhc(struct pltfm_imx_data *data)
 288 {
 289         return data->socdata == &usdhc_imx6q_data;
 290 }
 291 
 292 static inline int esdhc_is_usdhc(struct pltfm_imx_data *data)
 293 {
 294         return !!(data->socdata->flags & ESDHC_FLAG_USDHC);
 295 }
 296 
 297 static inline void esdhc_clrset_le(struct sdhci_host *host, u32 mask, u32 val, int reg)
 298 {
 299         void __iomem *base = host->ioaddr + (reg & ~0x3);
 300         u32 shift = (reg & 0x3) * 8;
 301 
 302         writel(((readl(base) & ~(mask << shift)) | (val << shift)), base);
 303 }
 304 
 305 static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
 306 {
 307         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 308         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 309         u32 val = readl(host->ioaddr + reg);
 310 
 311         if (unlikely(reg == SDHCI_PRESENT_STATE)) {
 312                 u32 fsl_prss = val;
 313                 /* save the least 20 bits */
 314                 val = fsl_prss & 0x000FFFFF;
 315                 /* move dat[0-3] bits */
 316                 val |= (fsl_prss & 0x0F000000) >> 4;
 317                 /* move cmd line bit */
 318                 val |= (fsl_prss & 0x00800000) << 1;
 319         }
 320 
 321         if (unlikely(reg == SDHCI_CAPABILITIES)) {
 322                 /* ignore bit[0-15] as it stores cap_1 register val for mx6sl */
 323                 if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
 324                         val &= 0xffff0000;
 325 
 326                 /* In FSL esdhc IC module, only bit20 is used to indicate the
 327                  * ADMA2 capability of esdhc, but this bit is messed up on
 328                  * some SOCs (e.g. on MX25, MX35 this bit is set, but they
 329                  * don't actually support ADMA2). So set the BROKEN_ADMA
 330                  * quirk on MX25/35 platforms.
 331                  */
 332 
 333                 if (val & SDHCI_CAN_DO_ADMA1) {
 334                         val &= ~SDHCI_CAN_DO_ADMA1;
 335                         val |= SDHCI_CAN_DO_ADMA2;
 336                 }
 337         }
 338 
 339         if (unlikely(reg == SDHCI_CAPABILITIES_1)) {
 340                 if (esdhc_is_usdhc(imx_data)) {
 341                         if (imx_data->socdata->flags & ESDHC_FLAG_HAVE_CAP1)
 342                                 val = readl(host->ioaddr + SDHCI_CAPABILITIES) & 0xFFFF;
 343                         else
 344                                 /* imx6q/dl does not have cap_1 register, fake one */
 345                                 val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104
 346                                         | SDHCI_SUPPORT_SDR50
 347                                         | SDHCI_USE_SDR50_TUNING
 348                                         | (SDHCI_TUNING_MODE_3 << SDHCI_RETUNING_MODE_SHIFT);
 349 
 350                         if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
 351                                 val |= SDHCI_SUPPORT_HS400;
 352 
 353                         /*
 354                          * Do not advertise faster UHS modes if there are no
 355                          * pinctrl states for 100MHz/200MHz.
 356                          */
 357                         if (IS_ERR_OR_NULL(imx_data->pins_100mhz) ||
 358                             IS_ERR_OR_NULL(imx_data->pins_200mhz))
 359                                 val &= ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_DDR50
 360                                          | SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_HS400);
 361                 }
 362         }
 363 
 364         if (unlikely(reg == SDHCI_MAX_CURRENT) && esdhc_is_usdhc(imx_data)) {
 365                 val = 0;
 366                 val |= 0xFF << SDHCI_MAX_CURRENT_330_SHIFT;
 367                 val |= 0xFF << SDHCI_MAX_CURRENT_300_SHIFT;
 368                 val |= 0xFF << SDHCI_MAX_CURRENT_180_SHIFT;
 369         }
 370 
 371         if (unlikely(reg == SDHCI_INT_STATUS)) {
 372                 if (val & ESDHC_INT_VENDOR_SPEC_DMA_ERR) {
 373                         val &= ~ESDHC_INT_VENDOR_SPEC_DMA_ERR;
 374                         val |= SDHCI_INT_ADMA_ERROR;
 375                 }
 376 
 377                 /*
 378                  * mask off the interrupt we get in response to the manually
 379                  * sent CMD12
 380                  */
 381                 if ((imx_data->multiblock_status == WAIT_FOR_INT) &&
 382                     ((val & SDHCI_INT_RESPONSE) == SDHCI_INT_RESPONSE)) {
 383                         val &= ~SDHCI_INT_RESPONSE;
 384                         writel(SDHCI_INT_RESPONSE, host->ioaddr +
 385                                                    SDHCI_INT_STATUS);
 386                         imx_data->multiblock_status = NO_CMD_PENDING;
 387                 }
 388         }
 389 
 390         return val;
 391 }
 392 
 393 static void esdhc_writel_le(struct sdhci_host *host, u32 val, int reg)
 394 {
 395         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 396         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 397         u32 data;
 398 
 399         if (unlikely(reg == SDHCI_INT_ENABLE || reg == SDHCI_SIGNAL_ENABLE ||
 400                         reg == SDHCI_INT_STATUS)) {
 401                 if ((val & SDHCI_INT_CARD_INT) && !esdhc_is_usdhc(imx_data)) {
 402                         /*
 403                          * Clear and then set D3CD bit to avoid missing the
 404                          * card interrupt. This is an eSDHC controller problem
 405                          * so we need to apply the following workaround: clear
 406                          * and set D3CD bit will make eSDHC re-sample the card
 407                          * interrupt. In case a card interrupt was lost,
 408                          * re-sample it by the following steps.
 409                          */
 410                         data = readl(host->ioaddr + SDHCI_HOST_CONTROL);
 411                         data &= ~ESDHC_CTRL_D3CD;
 412                         writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
 413                         data |= ESDHC_CTRL_D3CD;
 414                         writel(data, host->ioaddr + SDHCI_HOST_CONTROL);
 415                 }
 416 
 417                 if (val & SDHCI_INT_ADMA_ERROR) {
 418                         val &= ~SDHCI_INT_ADMA_ERROR;
 419                         val |= ESDHC_INT_VENDOR_SPEC_DMA_ERR;
 420                 }
 421         }
 422 
 423         if (unlikely((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
 424                                 && (reg == SDHCI_INT_STATUS)
 425                                 && (val & SDHCI_INT_DATA_END))) {
 426                         u32 v;
 427                         v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 428                         v &= ~ESDHC_VENDOR_SPEC_SDIO_QUIRK;
 429                         writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
 430 
 431                         if (imx_data->multiblock_status == MULTIBLK_IN_PROCESS)
 432                         {
 433                                 /* send a manual CMD12 with RESPTYP=none */
 434                                 data = MMC_STOP_TRANSMISSION << 24 |
 435                                        SDHCI_CMD_ABORTCMD << 16;
 436                                 writel(data, host->ioaddr + SDHCI_TRANSFER_MODE);
 437                                 imx_data->multiblock_status = WAIT_FOR_INT;
 438                         }
 439         }
 440 
 441         writel(val, host->ioaddr + reg);
 442 }
 443 
 444 static u16 esdhc_readw_le(struct sdhci_host *host, int reg)
 445 {
 446         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 447         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 448         u16 ret = 0;
 449         u32 val;
 450 
 451         if (unlikely(reg == SDHCI_HOST_VERSION)) {
 452                 reg ^= 2;
 453                 if (esdhc_is_usdhc(imx_data)) {
 454                         /*
 455                          * The usdhc register returns a wrong host version.
 456                          * Correct it here.
 457                          */
 458                         return SDHCI_SPEC_300;
 459                 }
 460         }
 461 
 462         if (unlikely(reg == SDHCI_HOST_CONTROL2)) {
 463                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 464                 if (val & ESDHC_VENDOR_SPEC_VSELECT)
 465                         ret |= SDHCI_CTRL_VDD_180;
 466 
 467                 if (esdhc_is_usdhc(imx_data)) {
 468                         if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
 469                                 val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 470                         else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING)
 471                                 /* the std tuning bits is in ACMD12_ERR for imx6sl */
 472                                 val = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
 473                 }
 474 
 475                 if (val & ESDHC_MIX_CTRL_EXE_TUNE)
 476                         ret |= SDHCI_CTRL_EXEC_TUNING;
 477                 if (val & ESDHC_MIX_CTRL_SMPCLK_SEL)
 478                         ret |= SDHCI_CTRL_TUNED_CLK;
 479 
 480                 ret &= ~SDHCI_CTRL_PRESET_VAL_ENABLE;
 481 
 482                 return ret;
 483         }
 484 
 485         if (unlikely(reg == SDHCI_TRANSFER_MODE)) {
 486                 if (esdhc_is_usdhc(imx_data)) {
 487                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 488                         ret = m & ESDHC_MIX_CTRL_SDHCI_MASK;
 489                         /* Swap AC23 bit */
 490                         if (m & ESDHC_MIX_CTRL_AC23EN) {
 491                                 ret &= ~ESDHC_MIX_CTRL_AC23EN;
 492                                 ret |= SDHCI_TRNS_AUTO_CMD23;
 493                         }
 494                 } else {
 495                         ret = readw(host->ioaddr + SDHCI_TRANSFER_MODE);
 496                 }
 497 
 498                 return ret;
 499         }
 500 
 501         return readw(host->ioaddr + reg);
 502 }
 503 
 504 static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
 505 {
 506         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 507         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 508         u32 new_val = 0;
 509 
 510         switch (reg) {
 511         case SDHCI_CLOCK_CONTROL:
 512                 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 513                 if (val & SDHCI_CLOCK_CARD_EN)
 514                         new_val |= ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
 515                 else
 516                         new_val &= ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON;
 517                 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
 518                 return;
 519         case SDHCI_HOST_CONTROL2:
 520                 new_val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 521                 if (val & SDHCI_CTRL_VDD_180)
 522                         new_val |= ESDHC_VENDOR_SPEC_VSELECT;
 523                 else
 524                         new_val &= ~ESDHC_VENDOR_SPEC_VSELECT;
 525                 writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
 526                 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
 527                         new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 528                         if (val & SDHCI_CTRL_TUNED_CLK) {
 529                                 new_val |= ESDHC_MIX_CTRL_SMPCLK_SEL;
 530                                 new_val |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 531                         } else {
 532                                 new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 533                                 new_val &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 534                         }
 535                         writel(new_val , host->ioaddr + ESDHC_MIX_CTRL);
 536                 } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
 537                         u32 v = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
 538                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 539                         if (val & SDHCI_CTRL_TUNED_CLK) {
 540                                 v |= ESDHC_MIX_CTRL_SMPCLK_SEL;
 541                         } else {
 542                                 v &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
 543                                 m &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
 544                                 m &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 545                         }
 546 
 547                         if (val & SDHCI_CTRL_EXEC_TUNING) {
 548                                 v |= ESDHC_MIX_CTRL_EXE_TUNE;
 549                                 m |= ESDHC_MIX_CTRL_FBCLK_SEL;
 550                                 m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 551                         } else {
 552                                 v &= ~ESDHC_MIX_CTRL_EXE_TUNE;
 553                         }
 554 
 555                         writel(v, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
 556                         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 557                 }
 558                 return;
 559         case SDHCI_TRANSFER_MODE:
 560                 if ((imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT)
 561                                 && (host->cmd->opcode == SD_IO_RW_EXTENDED)
 562                                 && (host->cmd->data->blocks > 1)
 563                                 && (host->cmd->data->flags & MMC_DATA_READ)) {
 564                         u32 v;
 565                         v = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 566                         v |= ESDHC_VENDOR_SPEC_SDIO_QUIRK;
 567                         writel(v, host->ioaddr + ESDHC_VENDOR_SPEC);
 568                 }
 569 
 570                 if (esdhc_is_usdhc(imx_data)) {
 571                         u32 wml;
 572                         u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 573                         /* Swap AC23 bit */
 574                         if (val & SDHCI_TRNS_AUTO_CMD23) {
 575                                 val &= ~SDHCI_TRNS_AUTO_CMD23;
 576                                 val |= ESDHC_MIX_CTRL_AC23EN;
 577                         }
 578                         m = val | (m & ~ESDHC_MIX_CTRL_SDHCI_MASK);
 579                         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 580 
 581                         /* Set watermark levels for PIO access to maximum value
 582                          * (128 words) to accommodate full 512 bytes buffer.
 583                          * For DMA access restore the levels to default value.
 584                          */
 585                         m = readl(host->ioaddr + ESDHC_WTMK_LVL);
 586                         if (val & SDHCI_TRNS_DMA)
 587                                 wml = ESDHC_WTMK_LVL_WML_VAL_DEF;
 588                         else
 589                                 wml = ESDHC_WTMK_LVL_WML_VAL_MAX;
 590                         m &= ~(ESDHC_WTMK_LVL_RD_WML_MASK |
 591                                ESDHC_WTMK_LVL_WR_WML_MASK);
 592                         m |= (wml << ESDHC_WTMK_LVL_RD_WML_SHIFT) |
 593                              (wml << ESDHC_WTMK_LVL_WR_WML_SHIFT);
 594                         writel(m, host->ioaddr + ESDHC_WTMK_LVL);
 595                 } else {
 596                         /*
 597                          * Postpone this write, we must do it together with a
 598                          * command write that is down below.
 599                          */
 600                         imx_data->scratchpad = val;
 601                 }
 602                 return;
 603         case SDHCI_COMMAND:
 604                 if (host->cmd->opcode == MMC_STOP_TRANSMISSION)
 605                         val |= SDHCI_CMD_ABORTCMD;
 606 
 607                 if ((host->cmd->opcode == MMC_SET_BLOCK_COUNT) &&
 608                     (imx_data->socdata->flags & ESDHC_FLAG_MULTIBLK_NO_INT))
 609                         imx_data->multiblock_status = MULTIBLK_IN_PROCESS;
 610 
 611                 if (esdhc_is_usdhc(imx_data))
 612                         writel(val << 16,
 613                                host->ioaddr + SDHCI_TRANSFER_MODE);
 614                 else
 615                         writel(val << 16 | imx_data->scratchpad,
 616                                host->ioaddr + SDHCI_TRANSFER_MODE);
 617                 return;
 618         case SDHCI_BLOCK_SIZE:
 619                 val &= ~SDHCI_MAKE_BLKSZ(0x7, 0);
 620                 break;
 621         }
 622         esdhc_clrset_le(host, 0xffff, val, reg);
 623 }
 624 
 625 static u8 esdhc_readb_le(struct sdhci_host *host, int reg)
 626 {
 627         u8 ret;
 628         u32 val;
 629 
 630         switch (reg) {
 631         case SDHCI_HOST_CONTROL:
 632                 val = readl(host->ioaddr + reg);
 633 
 634                 ret = val & SDHCI_CTRL_LED;
 635                 ret |= (val >> 5) & SDHCI_CTRL_DMA_MASK;
 636                 ret |= (val & ESDHC_CTRL_4BITBUS);
 637                 ret |= (val & ESDHC_CTRL_8BITBUS) << 3;
 638                 return ret;
 639         }
 640 
 641         return readb(host->ioaddr + reg);
 642 }
 643 
 644 static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg)
 645 {
 646         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 647         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 648         u32 new_val = 0;
 649         u32 mask;
 650 
 651         switch (reg) {
 652         case SDHCI_POWER_CONTROL:
 653                 /*
 654                  * FSL put some DMA bits here
 655                  * If your board has a regulator, code should be here
 656                  */
 657                 return;
 658         case SDHCI_HOST_CONTROL:
 659                 /* FSL messed up here, so we need to manually compose it. */
 660                 new_val = val & SDHCI_CTRL_LED;
 661                 /* ensure the endianness */
 662                 new_val |= ESDHC_HOST_CONTROL_LE;
 663                 /* bits 8&9 are reserved on mx25 */
 664                 if (!is_imx25_esdhc(imx_data)) {
 665                         /* DMA mode bits are shifted */
 666                         new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
 667                 }
 668 
 669                 /*
 670                  * Do not touch buswidth bits here. This is done in
 671                  * esdhc_pltfm_bus_width.
 672                  * Do not touch the D3CD bit either which is used for the
 673                  * SDIO interrupt erratum workaround.
 674                  */
 675                 mask = 0xffff & ~(ESDHC_CTRL_BUSWIDTH_MASK | ESDHC_CTRL_D3CD);
 676 
 677                 esdhc_clrset_le(host, mask, new_val, reg);
 678                 return;
 679         case SDHCI_SOFTWARE_RESET:
 680                 if (val & SDHCI_RESET_DATA)
 681                         new_val = readl(host->ioaddr + SDHCI_HOST_CONTROL);
 682                 break;
 683         }
 684         esdhc_clrset_le(host, 0xff, val, reg);
 685 
 686         if (reg == SDHCI_SOFTWARE_RESET) {
 687                 if (val & SDHCI_RESET_ALL) {
 688                         /*
 689                          * The esdhc has a design violation to SDHC spec which
 690                          * tells that software reset should not affect card
 691                          * detection circuit. But esdhc clears its SYSCTL
 692                          * register bits [0..2] during the software reset. This
 693                          * will stop those clocks that card detection circuit
 694                          * relies on. To work around it, we turn the clocks on
 695                          * back to keep card detection circuit functional.
 696                          */
 697                         esdhc_clrset_le(host, 0x7, 0x7, ESDHC_SYSTEM_CONTROL);
 698                         /*
 699                          * The reset on usdhc fails to clear MIX_CTRL register.
 700                          * Do it manually here.
 701                          */
 702                         if (esdhc_is_usdhc(imx_data)) {
 703                                 /*
 704                                  * the tuning bits should be kept during reset
 705                                  */
 706                                 new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
 707                                 writel(new_val & ESDHC_MIX_CTRL_TUNING_MASK,
 708                                                 host->ioaddr + ESDHC_MIX_CTRL);
 709                                 imx_data->is_ddr = 0;
 710                         }
 711                 } else if (val & SDHCI_RESET_DATA) {
 712                         /*
 713                          * The eSDHC DAT line software reset clears at least the
 714                          * data transfer width on i.MX25, so make sure that the
 715                          * Host Control register is unaffected.
 716                          */
 717                         esdhc_clrset_le(host, 0xff, new_val,
 718                                         SDHCI_HOST_CONTROL);
 719                 }
 720         }
 721 }
 722 
 723 static unsigned int esdhc_pltfm_get_max_clock(struct sdhci_host *host)
 724 {
 725         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 726 
 727         return pltfm_host->clock;
 728 }
 729 
 730 static unsigned int esdhc_pltfm_get_min_clock(struct sdhci_host *host)
 731 {
 732         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 733 
 734         return pltfm_host->clock / 256 / 16;
 735 }
 736 
 737 static inline void esdhc_pltfm_set_clock(struct sdhci_host *host,
 738                                          unsigned int clock)
 739 {
 740         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 741         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 742         unsigned int host_clock = pltfm_host->clock;
 743         int ddr_pre_div = imx_data->is_ddr ? 2 : 1;
 744         int pre_div = 1;
 745         int div = 1;
 746         u32 temp, val;
 747 
 748         if (esdhc_is_usdhc(imx_data)) {
 749                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 750                 writel(val & ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 751                         host->ioaddr + ESDHC_VENDOR_SPEC);
 752         }
 753 
 754         if (clock == 0) {
 755                 host->mmc->actual_clock = 0;
 756                 return;
 757         }
 758 
 759         /* For i.MX53 eSDHCv3, SYSCTL.SDCLKFS may not be set to 0. */
 760         if (is_imx53_esdhc(imx_data)) {
 761                 /*
 762                  * According to the i.MX53 reference manual, if DLLCTRL[10] can
 763                  * be set, then the controller is eSDHCv3, else it is eSDHCv2.
 764                  */
 765                 val = readl(host->ioaddr + ESDHC_DLL_CTRL);
 766                 writel(val | BIT(10), host->ioaddr + ESDHC_DLL_CTRL);
 767                 temp = readl(host->ioaddr + ESDHC_DLL_CTRL);
 768                 writel(val, host->ioaddr + ESDHC_DLL_CTRL);
 769                 if (temp & BIT(10))
 770                         pre_div = 2;
 771         }
 772 
 773         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 774         temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 775                 | ESDHC_CLOCK_MASK);
 776         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 777 
 778         if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) {
 779                 unsigned int max_clock;
 780 
 781                 max_clock = imx_data->is_ddr ? 45000000 : 150000000;
 782 
 783                 clock = min(clock, max_clock);
 784         }
 785 
 786         while (host_clock / (16 * pre_div * ddr_pre_div) > clock &&
 787                         pre_div < 256)
 788                 pre_div *= 2;
 789 
 790         while (host_clock / (div * pre_div * ddr_pre_div) > clock && div < 16)
 791                 div++;
 792 
 793         host->mmc->actual_clock = host_clock / (div * pre_div * ddr_pre_div);
 794         dev_dbg(mmc_dev(host->mmc), "desired SD clock: %d, actual: %d\n",
 795                 clock, host->mmc->actual_clock);
 796 
 797         pre_div >>= 1;
 798         div--;
 799 
 800         temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
 801         temp |= (ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN
 802                 | (div << ESDHC_DIVIDER_SHIFT)
 803                 | (pre_div << ESDHC_PREDIV_SHIFT));
 804         sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL);
 805 
 806         if (esdhc_is_usdhc(imx_data)) {
 807                 val = readl(host->ioaddr + ESDHC_VENDOR_SPEC);
 808                 writel(val | ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 809                         host->ioaddr + ESDHC_VENDOR_SPEC);
 810         }
 811 
 812         mdelay(1);
 813 }
 814 
 815 static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)
 816 {
 817         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 818         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 819         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
 820 
 821         switch (boarddata->wp_type) {
 822         case ESDHC_WP_GPIO:
 823                 return mmc_gpio_get_ro(host->mmc);
 824         case ESDHC_WP_CONTROLLER:
 825                 return !(readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 826                                SDHCI_WRITE_PROTECT);
 827         case ESDHC_WP_NONE:
 828                 break;
 829         }
 830 
 831         return -ENOSYS;
 832 }
 833 
 834 static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
 835 {
 836         u32 ctrl;
 837 
 838         switch (width) {
 839         case MMC_BUS_WIDTH_8:
 840                 ctrl = ESDHC_CTRL_8BITBUS;
 841                 break;
 842         case MMC_BUS_WIDTH_4:
 843                 ctrl = ESDHC_CTRL_4BITBUS;
 844                 break;
 845         default:
 846                 ctrl = 0;
 847                 break;
 848         }
 849 
 850         esdhc_clrset_le(host, ESDHC_CTRL_BUSWIDTH_MASK, ctrl,
 851                         SDHCI_HOST_CONTROL);
 852 }
 853 
 854 static int usdhc_execute_tuning(struct mmc_host *mmc, u32 opcode)
 855 {
 856         struct sdhci_host *host = mmc_priv(mmc);
 857 
 858         /*
 859          * i.MX uSDHC internally already uses a fixed optimized timing for
 860          * DDR50, normally does not require tuning for DDR50 mode.
 861          */
 862         if (host->timing == MMC_TIMING_UHS_DDR50)
 863                 return 0;
 864 
 865         return sdhci_execute_tuning(mmc, opcode);
 866 }
 867 
 868 static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
 869 {
 870         u32 reg;
 871 
 872         /* FIXME: delay a bit for card to be ready for next tuning due to errors */
 873         mdelay(1);
 874 
 875         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
 876         reg |= ESDHC_MIX_CTRL_EXE_TUNE | ESDHC_MIX_CTRL_SMPCLK_SEL |
 877                         ESDHC_MIX_CTRL_FBCLK_SEL;
 878         writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
 879         writel(val << 8, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
 880         dev_dbg(mmc_dev(host->mmc),
 881                 "tuning with delay 0x%x ESDHC_TUNE_CTRL_STATUS 0x%x\n",
 882                         val, readl(host->ioaddr + ESDHC_TUNE_CTRL_STATUS));
 883 }
 884 
 885 static void esdhc_post_tuning(struct sdhci_host *host)
 886 {
 887         u32 reg;
 888 
 889         reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
 890         reg &= ~ESDHC_MIX_CTRL_EXE_TUNE;
 891         reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
 892         writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
 893 }
 894 
 895 static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
 896 {
 897         int min, max, avg, ret;
 898 
 899         /* find the mininum delay first which can pass tuning */
 900         min = ESDHC_TUNE_CTRL_MIN;
 901         while (min < ESDHC_TUNE_CTRL_MAX) {
 902                 esdhc_prepare_tuning(host, min);
 903                 if (!mmc_send_tuning(host->mmc, opcode, NULL))
 904                         break;
 905                 min += ESDHC_TUNE_CTRL_STEP;
 906         }
 907 
 908         /* find the maxinum delay which can not pass tuning */
 909         max = min + ESDHC_TUNE_CTRL_STEP;
 910         while (max < ESDHC_TUNE_CTRL_MAX) {
 911                 esdhc_prepare_tuning(host, max);
 912                 if (mmc_send_tuning(host->mmc, opcode, NULL)) {
 913                         max -= ESDHC_TUNE_CTRL_STEP;
 914                         break;
 915                 }
 916                 max += ESDHC_TUNE_CTRL_STEP;
 917         }
 918 
 919         /* use average delay to get the best timing */
 920         avg = (min + max) / 2;
 921         esdhc_prepare_tuning(host, avg);
 922         ret = mmc_send_tuning(host->mmc, opcode, NULL);
 923         esdhc_post_tuning(host);
 924 
 925         dev_dbg(mmc_dev(host->mmc), "tuning %s at 0x%x ret %d\n",
 926                 ret ? "failed" : "passed", avg, ret);
 927 
 928         return ret;
 929 }
 930 
 931 static void esdhc_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios)
 932 {
 933         struct sdhci_host *host = mmc_priv(mmc);
 934         u32 m;
 935 
 936         m = readl(host->ioaddr + ESDHC_MIX_CTRL);
 937         if (ios->enhanced_strobe)
 938                 m |= ESDHC_MIX_CTRL_HS400_ES_EN;
 939         else
 940                 m &= ~ESDHC_MIX_CTRL_HS400_ES_EN;
 941         writel(m, host->ioaddr + ESDHC_MIX_CTRL);
 942 }
 943 
 944 static int esdhc_change_pinstate(struct sdhci_host *host,
 945                                                 unsigned int uhs)
 946 {
 947         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 948         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
 949         struct pinctrl_state *pinctrl;
 950 
 951         dev_dbg(mmc_dev(host->mmc), "change pinctrl state for uhs %d\n", uhs);
 952 
 953         if (IS_ERR(imx_data->pinctrl) ||
 954                 IS_ERR(imx_data->pins_default) ||
 955                 IS_ERR(imx_data->pins_100mhz) ||
 956                 IS_ERR(imx_data->pins_200mhz))
 957                 return -EINVAL;
 958 
 959         switch (uhs) {
 960         case MMC_TIMING_UHS_SDR50:
 961         case MMC_TIMING_UHS_DDR50:
 962                 pinctrl = imx_data->pins_100mhz;
 963                 break;
 964         case MMC_TIMING_UHS_SDR104:
 965         case MMC_TIMING_MMC_HS200:
 966         case MMC_TIMING_MMC_HS400:
 967                 pinctrl = imx_data->pins_200mhz;
 968                 break;
 969         default:
 970                 /* back to default state for other legacy timing */
 971                 pinctrl = imx_data->pins_default;
 972         }
 973 
 974         return pinctrl_select_state(imx_data->pinctrl, pinctrl);
 975 }
 976 
 977 /*
 978  * For HS400 eMMC, there is a data_strobe line. This signal is generated
 979  * by the device and used for data output and CRC status response output
 980  * in HS400 mode. The frequency of this signal follows the frequency of
 981  * CLK generated by host. The host receives the data which is aligned to the
 982  * edge of data_strobe line. Due to the time delay between CLK line and
 983  * data_strobe line, if the delay time is larger than one clock cycle,
 984  * then CLK and data_strobe line will be misaligned, read error shows up.
 985  */
 986 static void esdhc_set_strobe_dll(struct sdhci_host *host)
 987 {
 988         u32 v;
 989 
 990         /* disable clock before enabling strobe dll */
 991         writel(readl(host->ioaddr + ESDHC_VENDOR_SPEC) &
 992                 ~ESDHC_VENDOR_SPEC_FRC_SDCLK_ON,
 993                 host->ioaddr + ESDHC_VENDOR_SPEC);
 994 
 995         /* force a reset on strobe dll */
 996         writel(ESDHC_STROBE_DLL_CTRL_RESET,
 997                 host->ioaddr + ESDHC_STROBE_DLL_CTRL);
 998         /* clear the reset bit on strobe dll before any setting */
 999         writel(0, host->ioaddr + ESDHC_STROBE_DLL_CTRL);
1000 
1001         /*
1002          * enable strobe dll ctrl and adjust the delay target
1003          * for the uSDHC loopback read clock
1004          */
1005         v = ESDHC_STROBE_DLL_CTRL_ENABLE |
1006                 ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT |
1007                 (7 << ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT);
1008         writel(v, host->ioaddr + ESDHC_STROBE_DLL_CTRL);
1009         /* wait 5us to make sure strobe dll status register stable */
1010         udelay(5);
1011         v = readl(host->ioaddr + ESDHC_STROBE_DLL_STATUS);
1012         if (!(v & ESDHC_STROBE_DLL_STS_REF_LOCK))
1013                 dev_warn(mmc_dev(host->mmc),
1014                 "warning! HS400 strobe DLL status REF not lock!\n");
1015         if (!(v & ESDHC_STROBE_DLL_STS_SLV_LOCK))
1016                 dev_warn(mmc_dev(host->mmc),
1017                 "warning! HS400 strobe DLL status SLV not lock!\n");
1018 }
1019 
1020 static void esdhc_reset_tuning(struct sdhci_host *host)
1021 {
1022         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1023         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1024         u32 ctrl;
1025 
1026         /* Reset the tuning circuit */
1027         if (esdhc_is_usdhc(imx_data)) {
1028                 if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
1029                         ctrl = readl(host->ioaddr + ESDHC_MIX_CTRL);
1030                         ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
1031                         ctrl &= ~ESDHC_MIX_CTRL_FBCLK_SEL;
1032                         writel(ctrl, host->ioaddr + ESDHC_MIX_CTRL);
1033                         writel(0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
1034                 } else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
1035                         ctrl = readl(host->ioaddr + SDHCI_AUTO_CMD_STATUS);
1036                         ctrl &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
1037                         writel(ctrl, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
1038                 }
1039         }
1040 }
1041 
1042 static void esdhc_set_uhs_signaling(struct sdhci_host *host, unsigned timing)
1043 {
1044         u32 m;
1045         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1046         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1047         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
1048 
1049         /* disable ddr mode and disable HS400 mode */
1050         m = readl(host->ioaddr + ESDHC_MIX_CTRL);
1051         m &= ~(ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN);
1052         imx_data->is_ddr = 0;
1053 
1054         switch (timing) {
1055         case MMC_TIMING_UHS_SDR12:
1056         case MMC_TIMING_UHS_SDR25:
1057         case MMC_TIMING_UHS_SDR50:
1058         case MMC_TIMING_UHS_SDR104:
1059         case MMC_TIMING_MMC_HS:
1060         case MMC_TIMING_MMC_HS200:
1061                 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
1062                 break;
1063         case MMC_TIMING_UHS_DDR50:
1064         case MMC_TIMING_MMC_DDR52:
1065                 m |= ESDHC_MIX_CTRL_DDREN;
1066                 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
1067                 imx_data->is_ddr = 1;
1068                 if (boarddata->delay_line) {
1069                         u32 v;
1070                         v = boarddata->delay_line <<
1071                                 ESDHC_DLL_OVERRIDE_VAL_SHIFT |
1072                                 (1 << ESDHC_DLL_OVERRIDE_EN_SHIFT);
1073                         if (is_imx53_esdhc(imx_data))
1074                                 v <<= 1;
1075                         writel(v, host->ioaddr + ESDHC_DLL_CTRL);
1076                 }
1077                 break;
1078         case MMC_TIMING_MMC_HS400:
1079                 m |= ESDHC_MIX_CTRL_DDREN | ESDHC_MIX_CTRL_HS400_EN;
1080                 writel(m, host->ioaddr + ESDHC_MIX_CTRL);
1081                 imx_data->is_ddr = 1;
1082                 /* update clock after enable DDR for strobe DLL lock */
1083                 host->ops->set_clock(host, host->clock);
1084                 esdhc_set_strobe_dll(host);
1085                 break;
1086         case MMC_TIMING_LEGACY:
1087         default:
1088                 esdhc_reset_tuning(host);
1089                 break;
1090         }
1091 
1092         esdhc_change_pinstate(host, timing);
1093 }
1094 
1095 static void esdhc_reset(struct sdhci_host *host, u8 mask)
1096 {
1097         sdhci_reset(host, mask);
1098 
1099         sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
1100         sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
1101 }
1102 
1103 static unsigned int esdhc_get_max_timeout_count(struct sdhci_host *host)
1104 {
1105         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1106         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1107 
1108         /* Doc Erratum: the uSDHC actual maximum timeout count is 1 << 29 */
1109         return esdhc_is_usdhc(imx_data) ? 1 << 29 : 1 << 27;
1110 }
1111 
1112 static void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
1113 {
1114         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1115         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1116 
1117         /* use maximum timeout counter */
1118         esdhc_clrset_le(host, ESDHC_SYS_CTRL_DTOCV_MASK,
1119                         esdhc_is_usdhc(imx_data) ? 0xF : 0xE,
1120                         SDHCI_TIMEOUT_CONTROL);
1121 }
1122 
1123 static u32 esdhc_cqhci_irq(struct sdhci_host *host, u32 intmask)
1124 {
1125         int cmd_error = 0;
1126         int data_error = 0;
1127 
1128         if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
1129                 return intmask;
1130 
1131         cqhci_irq(host->mmc, intmask, cmd_error, data_error);
1132 
1133         return 0;
1134 }
1135 
1136 static struct sdhci_ops sdhci_esdhc_ops = {
1137         .read_l = esdhc_readl_le,
1138         .read_w = esdhc_readw_le,
1139         .read_b = esdhc_readb_le,
1140         .write_l = esdhc_writel_le,
1141         .write_w = esdhc_writew_le,
1142         .write_b = esdhc_writeb_le,
1143         .set_clock = esdhc_pltfm_set_clock,
1144         .get_max_clock = esdhc_pltfm_get_max_clock,
1145         .get_min_clock = esdhc_pltfm_get_min_clock,
1146         .get_max_timeout_count = esdhc_get_max_timeout_count,
1147         .get_ro = esdhc_pltfm_get_ro,
1148         .set_timeout = esdhc_set_timeout,
1149         .set_bus_width = esdhc_pltfm_set_bus_width,
1150         .set_uhs_signaling = esdhc_set_uhs_signaling,
1151         .reset = esdhc_reset,
1152         .irq = esdhc_cqhci_irq,
1153 };
1154 
1155 static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
1156         .quirks = ESDHC_DEFAULT_QUIRKS | SDHCI_QUIRK_NO_HISPD_BIT
1157                         | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC
1158                         | SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC
1159                         | SDHCI_QUIRK_BROKEN_CARD_DETECTION,
1160         .ops = &sdhci_esdhc_ops,
1161 };
1162 
1163 static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
1164 {
1165         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1166         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1167         int tmp;
1168 
1169         if (esdhc_is_usdhc(imx_data)) {
1170                 /*
1171                  * The imx6q ROM code will change the default watermark
1172                  * level setting to something insane.  Change it back here.
1173                  */
1174                 writel(ESDHC_WTMK_DEFAULT_VAL, host->ioaddr + ESDHC_WTMK_LVL);
1175 
1176                 /*
1177                  * ROM code will change the bit burst_length_enable setting
1178                  * to zero if this usdhc is chosen to boot system. Change
1179                  * it back here, otherwise it will impact the performance a
1180                  * lot. This bit is used to enable/disable the burst length
1181                  * for the external AHB2AXI bridge. It's useful especially
1182                  * for INCR transfer because without burst length indicator,
1183                  * the AHB2AXI bridge does not know the burst length in
1184                  * advance. And without burst length indicator, AHB INCR
1185                  * transfer can only be converted to singles on the AXI side.
1186                  */
1187                 writel(readl(host->ioaddr + SDHCI_HOST_CONTROL)
1188                         | ESDHC_BURST_LEN_EN_INCR,
1189                         host->ioaddr + SDHCI_HOST_CONTROL);
1190 
1191                 /*
1192                  * erratum ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL
1193                  * TO1.1, it's harmless for MX6SL
1194                  */
1195                 writel(readl(host->ioaddr + 0x6c) & ~BIT(7),
1196                         host->ioaddr + 0x6c);
1197 
1198                 /* disable DLL_CTRL delay line settings */
1199                 writel(0x0, host->ioaddr + ESDHC_DLL_CTRL);
1200 
1201                 /*
1202                  * For the case of command with busy, if set the bit
1203                  * ESDHC_VEND_SPEC2_EN_BUSY_IRQ, USDHC will generate a
1204                  * transfer complete interrupt when busy is deasserted.
1205                  * When CQHCI use DCMD to send a CMD need R1b respons,
1206                  * CQHCI require to set ESDHC_VEND_SPEC2_EN_BUSY_IRQ,
1207                  * otherwise DCMD will always meet timeout waiting for
1208                  * hardware interrupt issue.
1209                  */
1210                 if (imx_data->socdata->flags & ESDHC_FLAG_CQHCI) {
1211                         tmp = readl(host->ioaddr + ESDHC_VEND_SPEC2);
1212                         tmp |= ESDHC_VEND_SPEC2_EN_BUSY_IRQ;
1213                         writel(tmp, host->ioaddr + ESDHC_VEND_SPEC2);
1214 
1215                         host->quirks &= ~SDHCI_QUIRK_NO_BUSY_IRQ;
1216                 }
1217 
1218                 if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
1219                         tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL);
1220                         tmp |= ESDHC_STD_TUNING_EN |
1221                                 ESDHC_TUNING_START_TAP_DEFAULT;
1222                         if (imx_data->boarddata.tuning_start_tap) {
1223                                 tmp &= ~ESDHC_TUNING_START_TAP_MASK;
1224                                 tmp |= imx_data->boarddata.tuning_start_tap;
1225                         }
1226 
1227                         if (imx_data->boarddata.tuning_step) {
1228                                 tmp &= ~ESDHC_TUNING_STEP_MASK;
1229                                 tmp |= imx_data->boarddata.tuning_step
1230                                         << ESDHC_TUNING_STEP_SHIFT;
1231                         }
1232                         writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
1233                 } else if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
1234                         /*
1235                          * ESDHC_STD_TUNING_EN may be configed in bootloader
1236                          * or ROM code, so clear this bit here to make sure
1237                          * the manual tuning can work.
1238                          */
1239                         tmp = readl(host->ioaddr + ESDHC_TUNING_CTRL);
1240                         tmp &= ~ESDHC_STD_TUNING_EN;
1241                         writel(tmp, host->ioaddr + ESDHC_TUNING_CTRL);
1242                 }
1243         }
1244 }
1245 
1246 static void esdhc_cqe_enable(struct mmc_host *mmc)
1247 {
1248         struct sdhci_host *host = mmc_priv(mmc);
1249         struct cqhci_host *cq_host = mmc->cqe_private;
1250         u32 reg;
1251         u16 mode;
1252         int count = 10;
1253 
1254         /*
1255          * CQE gets stuck if it sees Buffer Read Enable bit set, which can be
1256          * the case after tuning, so ensure the buffer is drained.
1257          */
1258         reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
1259         while (reg & SDHCI_DATA_AVAILABLE) {
1260                 sdhci_readl(host, SDHCI_BUFFER);
1261                 reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
1262                 if (count-- == 0) {
1263                         dev_warn(mmc_dev(host->mmc),
1264                                 "CQE may get stuck because the Buffer Read Enable bit is set\n");
1265                         break;
1266                 }
1267                 mdelay(1);
1268         }
1269 
1270         /*
1271          * Runtime resume will reset the entire host controller, which
1272          * will also clear the DMAEN/BCEN of register ESDHC_MIX_CTRL.
1273          * Here set DMAEN and BCEN when enable CMDQ.
1274          */
1275         mode = sdhci_readw(host, SDHCI_TRANSFER_MODE);
1276         if (host->flags & SDHCI_REQ_USE_DMA)
1277                 mode |= SDHCI_TRNS_DMA;
1278         if (!(host->quirks2 & SDHCI_QUIRK2_SUPPORT_SINGLE))
1279                 mode |= SDHCI_TRNS_BLK_CNT_EN;
1280         sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
1281 
1282         /*
1283          * Though Runtime resume reset the entire host controller,
1284          * but do not impact the CQHCI side, need to clear the
1285          * HALT bit, avoid CQHCI stuck in the first request when
1286          * system resume back.
1287          */
1288         cqhci_writel(cq_host, 0, CQHCI_CTL);
1289         if (cqhci_readl(cq_host, CQHCI_CTL) && CQHCI_HALT)
1290                 dev_err(mmc_dev(host->mmc),
1291                         "failed to exit halt state when enable CQE\n");
1292 
1293 
1294         sdhci_cqe_enable(mmc);
1295 }
1296 
1297 static void esdhc_sdhci_dumpregs(struct mmc_host *mmc)
1298 {
1299         sdhci_dumpregs(mmc_priv(mmc));
1300 }
1301 
1302 static const struct cqhci_host_ops esdhc_cqhci_ops = {
1303         .enable         = esdhc_cqe_enable,
1304         .disable        = sdhci_cqe_disable,
1305         .dumpregs       = esdhc_sdhci_dumpregs,
1306 };
1307 
1308 #ifdef CONFIG_OF
1309 static int
1310 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
1311                          struct sdhci_host *host,
1312                          struct pltfm_imx_data *imx_data)
1313 {
1314         struct device_node *np = pdev->dev.of_node;
1315         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
1316         int ret;
1317 
1318         if (of_get_property(np, "fsl,wp-controller", NULL))
1319                 boarddata->wp_type = ESDHC_WP_CONTROLLER;
1320 
1321         /*
1322          * If we have this property, then activate WP check.
1323          * Retrieveing and requesting the actual WP GPIO will happen
1324          * in the call to mmc_of_parse().
1325          */
1326         if (of_property_read_bool(np, "wp-gpios"))
1327                 boarddata->wp_type = ESDHC_WP_GPIO;
1328 
1329         of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step);
1330         of_property_read_u32(np, "fsl,tuning-start-tap",
1331                              &boarddata->tuning_start_tap);
1332 
1333         if (of_find_property(np, "no-1-8-v", NULL))
1334                 host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
1335 
1336         if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line))
1337                 boarddata->delay_line = 0;
1338 
1339         mmc_of_parse_voltage(np, &host->ocr_mask);
1340 
1341         if (esdhc_is_usdhc(imx_data) && !IS_ERR(imx_data->pins_default)) {
1342                 imx_data->pins_100mhz = pinctrl_lookup_state(imx_data->pinctrl,
1343                                                 ESDHC_PINCTRL_STATE_100MHZ);
1344                 imx_data->pins_200mhz = pinctrl_lookup_state(imx_data->pinctrl,
1345                                                 ESDHC_PINCTRL_STATE_200MHZ);
1346         }
1347 
1348         /* call to generic mmc_of_parse to support additional capabilities */
1349         ret = mmc_of_parse(host->mmc);
1350         if (ret)
1351                 return ret;
1352 
1353         if (mmc_gpio_get_cd(host->mmc) >= 0)
1354                 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1355 
1356         return 0;
1357 }
1358 #else
1359 static inline int
1360 sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
1361                          struct sdhci_host *host,
1362                          struct pltfm_imx_data *imx_data)
1363 {
1364         return -ENODEV;
1365 }
1366 #endif
1367 
1368 static int sdhci_esdhc_imx_probe_nondt(struct platform_device *pdev,
1369                          struct sdhci_host *host,
1370                          struct pltfm_imx_data *imx_data)
1371 {
1372         struct esdhc_platform_data *boarddata = &imx_data->boarddata;
1373         int err;
1374 
1375         if (!host->mmc->parent->platform_data) {
1376                 dev_err(mmc_dev(host->mmc), "no board data!\n");
1377                 return -EINVAL;
1378         }
1379 
1380         imx_data->boarddata = *((struct esdhc_platform_data *)
1381                                 host->mmc->parent->platform_data);
1382         /* write_protect */
1383         if (boarddata->wp_type == ESDHC_WP_GPIO) {
1384                 host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
1385 
1386                 err = mmc_gpiod_request_ro(host->mmc, "wp", 0, 0, NULL);
1387                 if (err) {
1388                         dev_err(mmc_dev(host->mmc),
1389                                 "failed to request write-protect gpio!\n");
1390                         return err;
1391                 }
1392         }
1393 
1394         /* card_detect */
1395         switch (boarddata->cd_type) {
1396         case ESDHC_CD_GPIO:
1397                 err = mmc_gpiod_request_cd(host->mmc, "cd", 0, false, 0, NULL);
1398                 if (err) {
1399                         dev_err(mmc_dev(host->mmc),
1400                                 "failed to request card-detect gpio!\n");
1401                         return err;
1402                 }
1403                 /* fall through */
1404 
1405         case ESDHC_CD_CONTROLLER:
1406                 /* we have a working card_detect back */
1407                 host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
1408                 break;
1409 
1410         case ESDHC_CD_PERMANENT:
1411                 host->mmc->caps |= MMC_CAP_NONREMOVABLE;
1412                 break;
1413 
1414         case ESDHC_CD_NONE:
1415                 break;
1416         }
1417 
1418         switch (boarddata->max_bus_width) {
1419         case 8:
1420                 host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_4_BIT_DATA;
1421                 break;
1422         case 4:
1423                 host->mmc->caps |= MMC_CAP_4_BIT_DATA;
1424                 break;
1425         case 1:
1426         default:
1427                 host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
1428                 break;
1429         }
1430 
1431         return 0;
1432 }
1433 
1434 static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
1435 {
1436         const struct of_device_id *of_id =
1437                         of_match_device(imx_esdhc_dt_ids, &pdev->dev);
1438         struct sdhci_pltfm_host *pltfm_host;
1439         struct sdhci_host *host;
1440         struct cqhci_host *cq_host;
1441         int err;
1442         struct pltfm_imx_data *imx_data;
1443 
1444         host = sdhci_pltfm_init(pdev, &sdhci_esdhc_imx_pdata,
1445                                 sizeof(*imx_data));
1446         if (IS_ERR(host))
1447                 return PTR_ERR(host);
1448 
1449         pltfm_host = sdhci_priv(host);
1450 
1451         imx_data = sdhci_pltfm_priv(pltfm_host);
1452 
1453         imx_data->socdata = of_id ? of_id->data : (struct esdhc_soc_data *)
1454                                                   pdev->id_entry->driver_data;
1455 
1456         if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
1457                 pm_qos_add_request(&imx_data->pm_qos_req,
1458                         PM_QOS_CPU_DMA_LATENCY, 0);
1459 
1460         imx_data->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
1461         if (IS_ERR(imx_data->clk_ipg)) {
1462                 err = PTR_ERR(imx_data->clk_ipg);
1463                 goto free_sdhci;
1464         }
1465 
1466         imx_data->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
1467         if (IS_ERR(imx_data->clk_ahb)) {
1468                 err = PTR_ERR(imx_data->clk_ahb);
1469                 goto free_sdhci;
1470         }
1471 
1472         imx_data->clk_per = devm_clk_get(&pdev->dev, "per");
1473         if (IS_ERR(imx_data->clk_per)) {
1474                 err = PTR_ERR(imx_data->clk_per);
1475                 goto free_sdhci;
1476         }
1477 
1478         pltfm_host->clk = imx_data->clk_per;
1479         pltfm_host->clock = clk_get_rate(pltfm_host->clk);
1480         err = clk_prepare_enable(imx_data->clk_per);
1481         if (err)
1482                 goto free_sdhci;
1483         err = clk_prepare_enable(imx_data->clk_ipg);
1484         if (err)
1485                 goto disable_per_clk;
1486         err = clk_prepare_enable(imx_data->clk_ahb);
1487         if (err)
1488                 goto disable_ipg_clk;
1489 
1490         imx_data->pinctrl = devm_pinctrl_get(&pdev->dev);
1491         if (IS_ERR(imx_data->pinctrl)) {
1492                 err = PTR_ERR(imx_data->pinctrl);
1493                 goto disable_ahb_clk;
1494         }
1495 
1496         imx_data->pins_default = pinctrl_lookup_state(imx_data->pinctrl,
1497                                                 PINCTRL_STATE_DEFAULT);
1498         if (IS_ERR(imx_data->pins_default))
1499                 dev_warn(mmc_dev(host->mmc), "could not get default state\n");
1500 
1501         if (esdhc_is_usdhc(imx_data)) {
1502                 host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
1503                 host->mmc->caps |= MMC_CAP_1_8V_DDR | MMC_CAP_3_3V_DDR;
1504                 if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
1505                         host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
1506 
1507                 /* clear tuning bits in case ROM has set it already */
1508                 writel(0x0, host->ioaddr + ESDHC_MIX_CTRL);
1509                 writel(0x0, host->ioaddr + SDHCI_AUTO_CMD_STATUS);
1510                 writel(0x0, host->ioaddr + ESDHC_TUNE_CTRL_STATUS);
1511 
1512                 /*
1513                  * Link usdhc specific mmc_host_ops execute_tuning function,
1514                  * to replace the standard one in sdhci_ops.
1515                  */
1516                 host->mmc_host_ops.execute_tuning = usdhc_execute_tuning;
1517         }
1518 
1519         if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
1520                 sdhci_esdhc_ops.platform_execute_tuning =
1521                                         esdhc_executing_tuning;
1522 
1523         if (imx_data->socdata->flags & ESDHC_FLAG_ERR004536)
1524                 host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
1525 
1526         if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
1527                 host->quirks2 |= SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400;
1528 
1529         if (imx_data->socdata->flags & ESDHC_FLAG_HS400_ES) {
1530                 host->mmc->caps2 |= MMC_CAP2_HS400_ES;
1531                 host->mmc_host_ops.hs400_enhanced_strobe =
1532                                         esdhc_hs400_enhanced_strobe;
1533         }
1534 
1535         if (imx_data->socdata->flags & ESDHC_FLAG_CQHCI) {
1536                 host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
1537                 cq_host = devm_kzalloc(&pdev->dev, sizeof(*cq_host), GFP_KERNEL);
1538                 if (!cq_host) {
1539                         err = -ENOMEM;
1540                         goto disable_ahb_clk;
1541                 }
1542 
1543                 cq_host->mmio = host->ioaddr + ESDHC_CQHCI_ADDR_OFFSET;
1544                 cq_host->ops = &esdhc_cqhci_ops;
1545 
1546                 err = cqhci_init(cq_host, host->mmc, false);
1547                 if (err)
1548                         goto disable_ahb_clk;
1549         }
1550 
1551         if (of_id)
1552                 err = sdhci_esdhc_imx_probe_dt(pdev, host, imx_data);
1553         else
1554                 err = sdhci_esdhc_imx_probe_nondt(pdev, host, imx_data);
1555         if (err)
1556                 goto disable_ahb_clk;
1557 
1558         host->tuning_delay = 1;
1559 
1560         sdhci_esdhc_imx_hwinit(host);
1561 
1562         err = sdhci_add_host(host);
1563         if (err)
1564                 goto disable_ahb_clk;
1565 
1566         pm_runtime_set_active(&pdev->dev);
1567         pm_runtime_set_autosuspend_delay(&pdev->dev, 50);
1568         pm_runtime_use_autosuspend(&pdev->dev);
1569         pm_suspend_ignore_children(&pdev->dev, 1);
1570         pm_runtime_enable(&pdev->dev);
1571 
1572         return 0;
1573 
1574 disable_ahb_clk:
1575         clk_disable_unprepare(imx_data->clk_ahb);
1576 disable_ipg_clk:
1577         clk_disable_unprepare(imx_data->clk_ipg);
1578 disable_per_clk:
1579         clk_disable_unprepare(imx_data->clk_per);
1580 free_sdhci:
1581         if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
1582                 pm_qos_remove_request(&imx_data->pm_qos_req);
1583         sdhci_pltfm_free(pdev);
1584         return err;
1585 }
1586 
1587 static int sdhci_esdhc_imx_remove(struct platform_device *pdev)
1588 {
1589         struct sdhci_host *host = platform_get_drvdata(pdev);
1590         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1591         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1592         int dead = (readl(host->ioaddr + SDHCI_INT_STATUS) == 0xffffffff);
1593 
1594         pm_runtime_get_sync(&pdev->dev);
1595         pm_runtime_disable(&pdev->dev);
1596         pm_runtime_put_noidle(&pdev->dev);
1597 
1598         sdhci_remove_host(host, dead);
1599 
1600         clk_disable_unprepare(imx_data->clk_per);
1601         clk_disable_unprepare(imx_data->clk_ipg);
1602         clk_disable_unprepare(imx_data->clk_ahb);
1603 
1604         if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
1605                 pm_qos_remove_request(&imx_data->pm_qos_req);
1606 
1607         sdhci_pltfm_free(pdev);
1608 
1609         return 0;
1610 }
1611 
1612 #ifdef CONFIG_PM_SLEEP
1613 static int sdhci_esdhc_suspend(struct device *dev)
1614 {
1615         struct sdhci_host *host = dev_get_drvdata(dev);
1616         int ret;
1617 
1618         if (host->mmc->caps2 & MMC_CAP2_CQE) {
1619                 ret = cqhci_suspend(host->mmc);
1620                 if (ret)
1621                         return ret;
1622         }
1623 
1624         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
1625                 mmc_retune_needed(host->mmc);
1626 
1627         return sdhci_suspend_host(host);
1628 }
1629 
1630 static int sdhci_esdhc_resume(struct device *dev)
1631 {
1632         struct sdhci_host *host = dev_get_drvdata(dev);
1633         int ret;
1634 
1635         /* re-initialize hw state in case it's lost in low power mode */
1636         sdhci_esdhc_imx_hwinit(host);
1637 
1638         ret = sdhci_resume_host(host);
1639         if (ret)
1640                 return ret;
1641 
1642         if (host->mmc->caps2 & MMC_CAP2_CQE)
1643                 ret = cqhci_resume(host->mmc);
1644 
1645         return ret;
1646 }
1647 #endif
1648 
1649 #ifdef CONFIG_PM
1650 static int sdhci_esdhc_runtime_suspend(struct device *dev)
1651 {
1652         struct sdhci_host *host = dev_get_drvdata(dev);
1653         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1654         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1655         int ret;
1656 
1657         if (host->mmc->caps2 & MMC_CAP2_CQE) {
1658                 ret = cqhci_suspend(host->mmc);
1659                 if (ret)
1660                         return ret;
1661         }
1662 
1663         ret = sdhci_runtime_suspend_host(host);
1664         if (ret)
1665                 return ret;
1666 
1667         if (host->tuning_mode != SDHCI_TUNING_MODE_3)
1668                 mmc_retune_needed(host->mmc);
1669 
1670         imx_data->actual_clock = host->mmc->actual_clock;
1671         esdhc_pltfm_set_clock(host, 0);
1672         clk_disable_unprepare(imx_data->clk_per);
1673         clk_disable_unprepare(imx_data->clk_ipg);
1674         clk_disable_unprepare(imx_data->clk_ahb);
1675 
1676         if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
1677                 pm_qos_remove_request(&imx_data->pm_qos_req);
1678 
1679         return ret;
1680 }
1681 
1682 static int sdhci_esdhc_runtime_resume(struct device *dev)
1683 {
1684         struct sdhci_host *host = dev_get_drvdata(dev);
1685         struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
1686         struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
1687         int err;
1688 
1689         if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
1690                 pm_qos_add_request(&imx_data->pm_qos_req,
1691                         PM_QOS_CPU_DMA_LATENCY, 0);
1692 
1693         err = clk_prepare_enable(imx_data->clk_ahb);
1694         if (err)
1695                 goto remove_pm_qos_request;
1696 
1697         err = clk_prepare_enable(imx_data->clk_per);
1698         if (err)
1699                 goto disable_ahb_clk;
1700 
1701         err = clk_prepare_enable(imx_data->clk_ipg);
1702         if (err)
1703                 goto disable_per_clk;
1704 
1705         esdhc_pltfm_set_clock(host, imx_data->actual_clock);
1706 
1707         err = sdhci_runtime_resume_host(host, 0);
1708         if (err)
1709                 goto disable_ipg_clk;
1710 
1711         if (host->mmc->caps2 & MMC_CAP2_CQE)
1712                 err = cqhci_resume(host->mmc);
1713 
1714         return err;
1715 
1716 disable_ipg_clk:
1717         clk_disable_unprepare(imx_data->clk_ipg);
1718 disable_per_clk:
1719         clk_disable_unprepare(imx_data->clk_per);
1720 disable_ahb_clk:
1721         clk_disable_unprepare(imx_data->clk_ahb);
1722 remove_pm_qos_request:
1723         if (imx_data->socdata->flags & ESDHC_FLAG_PMQOS)
1724                 pm_qos_remove_request(&imx_data->pm_qos_req);
1725         return err;
1726 }
1727 #endif
1728 
1729 static const struct dev_pm_ops sdhci_esdhc_pmops = {
1730         SET_SYSTEM_SLEEP_PM_OPS(sdhci_esdhc_suspend, sdhci_esdhc_resume)
1731         SET_RUNTIME_PM_OPS(sdhci_esdhc_runtime_suspend,
1732                                 sdhci_esdhc_runtime_resume, NULL)
1733 };
1734 
1735 static struct platform_driver sdhci_esdhc_imx_driver = {
1736         .driver         = {
1737                 .name   = "sdhci-esdhc-imx",
1738                 .of_match_table = imx_esdhc_dt_ids,
1739                 .pm     = &sdhci_esdhc_pmops,
1740         },
1741         .id_table       = imx_esdhc_devtype,
1742         .probe          = sdhci_esdhc_imx_probe,
1743         .remove         = sdhci_esdhc_imx_remove,
1744 };
1745 
1746 module_platform_driver(sdhci_esdhc_imx_driver);
1747 
1748 MODULE_DESCRIPTION("SDHCI driver for Freescale i.MX eSDHC");
1749 MODULE_AUTHOR("Wolfram Sang <kernel@pengutronix.de>");
1750 MODULE_LICENSE("GPL v2");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/mmc/host/sdhci-esdhc-imx.c

DEFINITIONS
