Merge https://source.denx.de/u-boot/custodians/u-boot-mmc

[thirdparty/u-boot.git] / include / mmc.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright 2008,2010 Freescale Semiconductor, Inc
 * Andy Fleming
 *
 * Based (loosely) on the Linux code
 */

#ifndef _MMC_H_
#define _MMC_H_

#include <linux/bitops.h>
#include <linux/list.h>
#include <linux/sizes.h>
#include <linux/compiler.h>
#include <linux/dma-direction.h>
#include <part.h>

struct bd_info;

#if CONFIG_IS_ENABLED(MMC_HS200_SUPPORT)
#define MMC_SUPPORTS_TUNING
#endif
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
#define MMC_SUPPORTS_TUNING
#endif

/* SD/MMC version bits; 8 flags, 8 major, 8 minor, 8 change */
#define SD_VERSION_SD   (1U << 31)
#define MMC_VERSION_MMC (1U << 30)

#define MAKE_SDMMC_VERSION(a, b, c)     \
        ((((u32)(a)) << 16) | ((u32)(b) << 8) | (u32)(c))
#define MAKE_SD_VERSION(a, b, c)        \
        (SD_VERSION_SD | MAKE_SDMMC_VERSION(a, b, c))
#define MAKE_MMC_VERSION(a, b, c)       \
        (MMC_VERSION_MMC | MAKE_SDMMC_VERSION(a, b, c))

#define EXTRACT_SDMMC_MAJOR_VERSION(x)  \
        (((u32)(x) >> 16) & 0xff)
#define EXTRACT_SDMMC_MINOR_VERSION(x)  \
        (((u32)(x) >> 8) & 0xff)
#define EXTRACT_SDMMC_CHANGE_VERSION(x) \
        ((u32)(x) & 0xff)

#define SD_VERSION_3            MAKE_SD_VERSION(3, 0, 0)
#define SD_VERSION_2            MAKE_SD_VERSION(2, 0, 0)
#define SD_VERSION_1_0          MAKE_SD_VERSION(1, 0, 0)
#define SD_VERSION_1_10         MAKE_SD_VERSION(1, 10, 0)

#define MMC_VERSION_UNKNOWN     MAKE_MMC_VERSION(0, 0, 0)
#define MMC_VERSION_1_2         MAKE_MMC_VERSION(1, 2, 0)
#define MMC_VERSION_1_4         MAKE_MMC_VERSION(1, 4, 0)
#define MMC_VERSION_2_2         MAKE_MMC_VERSION(2, 2, 0)
#define MMC_VERSION_3           MAKE_MMC_VERSION(3, 0, 0)
#define MMC_VERSION_4           MAKE_MMC_VERSION(4, 0, 0)
#define MMC_VERSION_4_1         MAKE_MMC_VERSION(4, 1, 0)
#define MMC_VERSION_4_2         MAKE_MMC_VERSION(4, 2, 0)
#define MMC_VERSION_4_3         MAKE_MMC_VERSION(4, 3, 0)
#define MMC_VERSION_4_4         MAKE_MMC_VERSION(4, 4, 0)
#define MMC_VERSION_4_41        MAKE_MMC_VERSION(4, 4, 1)
#define MMC_VERSION_4_5         MAKE_MMC_VERSION(4, 5, 0)
#define MMC_VERSION_5_0         MAKE_MMC_VERSION(5, 0, 0)
#define MMC_VERSION_5_1         MAKE_MMC_VERSION(5, 1, 0)

#define MMC_CAP(mode)           (1 << mode)
#define MMC_MODE_HS             (MMC_CAP(MMC_HS) | MMC_CAP(SD_HS))
#define MMC_MODE_HS_52MHz       MMC_CAP(MMC_HS_52)
#define MMC_MODE_DDR_52MHz      MMC_CAP(MMC_DDR_52)
#define MMC_MODE_HS200          MMC_CAP(MMC_HS_200)
#define MMC_MODE_HS400          MMC_CAP(MMC_HS_400)
#define MMC_MODE_HS400_ES       MMC_CAP(MMC_HS_400_ES)

#define MMC_CAP_NONREMOVABLE    BIT(14)
#define MMC_CAP_NEEDS_POLL      BIT(15)
#define MMC_CAP_CD_ACTIVE_HIGH  BIT(16)

#define MMC_MODE_8BIT           BIT(30)
#define MMC_MODE_4BIT           BIT(29)
#define MMC_MODE_1BIT           BIT(28)
#define MMC_MODE_SPI            BIT(27)


#define SD_DATA_4BIT    0x00040000

#define IS_SD(x)        ((x)->version & SD_VERSION_SD)
#define IS_MMC(x)       ((x)->version & MMC_VERSION_MMC)

#define MMC_DATA_READ           1
#define MMC_DATA_WRITE          2

#define MMC_CMD_GO_IDLE_STATE           0
#define MMC_CMD_SEND_OP_COND            1
#define MMC_CMD_ALL_SEND_CID            2
#define MMC_CMD_SET_RELATIVE_ADDR       3
#define MMC_CMD_SET_DSR                 4
#define MMC_CMD_SWITCH                  6
#define MMC_CMD_SELECT_CARD             7
#define MMC_CMD_SEND_EXT_CSD            8
#define MMC_CMD_SEND_CSD                9
#define MMC_CMD_SEND_CID                10
#define MMC_CMD_STOP_TRANSMISSION       12
#define MMC_CMD_SEND_STATUS             13
#define MMC_CMD_SET_BLOCKLEN            16
#define MMC_CMD_READ_SINGLE_BLOCK       17
#define MMC_CMD_READ_MULTIPLE_BLOCK     18
#define MMC_CMD_SEND_TUNING_BLOCK               19
#define MMC_CMD_SEND_TUNING_BLOCK_HS200 21
#define MMC_CMD_SET_BLOCK_COUNT         23
#define MMC_CMD_WRITE_SINGLE_BLOCK      24
#define MMC_CMD_WRITE_MULTIPLE_BLOCK    25
#define MMC_CMD_ERASE_GROUP_START       35
#define MMC_CMD_ERASE_GROUP_END         36
#define MMC_CMD_ERASE                   38
#define MMC_CMD_APP_CMD                 55
#define MMC_CMD_SPI_READ_OCR            58
#define MMC_CMD_SPI_CRC_ON_OFF          59
#define MMC_CMD_RES_MAN                 62

#define MMC_CMD62_ARG1                  0xefac62ec
#define MMC_CMD62_ARG2                  0xcbaea7


#define SD_CMD_SEND_RELATIVE_ADDR       3
#define SD_CMD_SWITCH_FUNC              6
#define SD_CMD_SEND_IF_COND             8
#define SD_CMD_SWITCH_UHS18V            11

#define SD_CMD_APP_SET_BUS_WIDTH        6
#define SD_CMD_APP_SD_STATUS            13
#define SD_CMD_ERASE_WR_BLK_START       32
#define SD_CMD_ERASE_WR_BLK_END         33
#define SD_CMD_APP_SEND_OP_COND         41
#define SD_CMD_APP_SEND_SCR             51

static inline bool mmc_is_tuning_cmd(uint cmdidx)
{
        if ((cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200) ||
            (cmdidx == MMC_CMD_SEND_TUNING_BLOCK))
                return true;
        return false;
}

/* SCR definitions in different words */
#define SD_HIGHSPEED_BUSY       0x00020000
#define SD_HIGHSPEED_SUPPORTED  0x00020000

#define UHS_SDR12_BUS_SPEED     0
#define HIGH_SPEED_BUS_SPEED    1
#define UHS_SDR25_BUS_SPEED     1
#define UHS_SDR50_BUS_SPEED     2
#define UHS_SDR104_BUS_SPEED    3
#define UHS_DDR50_BUS_SPEED     4

#define SD_MODE_UHS_SDR12       BIT(UHS_SDR12_BUS_SPEED)
#define SD_MODE_UHS_SDR25       BIT(UHS_SDR25_BUS_SPEED)
#define SD_MODE_UHS_SDR50       BIT(UHS_SDR50_BUS_SPEED)
#define SD_MODE_UHS_SDR104      BIT(UHS_SDR104_BUS_SPEED)
#define SD_MODE_UHS_DDR50       BIT(UHS_DDR50_BUS_SPEED)

#define OCR_BUSY                0x80000000
#define OCR_HCS                 0x40000000
#define OCR_S18R                0x1000000
#define OCR_VOLTAGE_MASK        0x007FFF80
#define OCR_ACCESS_MODE         0x60000000

#define MMC_ERASE_ARG           0x00000000
#define MMC_SECURE_ERASE_ARG    0x80000000
#define MMC_TRIM_ARG            0x00000001
#define MMC_DISCARD_ARG         0x00000003
#define MMC_SECURE_TRIM1_ARG    0x80000001
#define MMC_SECURE_TRIM2_ARG    0x80008000

#define MMC_STATUS_MASK         (~0x0206BF7F)
#define MMC_STATUS_SWITCH_ERROR (1 << 7)
#define MMC_STATUS_RDY_FOR_DATA (1 << 8)
#define MMC_STATUS_CURR_STATE   (0xf << 9)
#define MMC_STATUS_ERROR        (1 << 19)

#define MMC_STATE_PRG           (7 << 9)
#define MMC_STATE_TRANS         (4 << 9)

#define MMC_VDD_165_195         0x00000080      /* VDD voltage 1.65 - 1.95 */
#define MMC_VDD_20_21           0x00000100      /* VDD voltage 2.0 ~ 2.1 */
#define MMC_VDD_21_22           0x00000200      /* VDD voltage 2.1 ~ 2.2 */
#define MMC_VDD_22_23           0x00000400      /* VDD voltage 2.2 ~ 2.3 */
#define MMC_VDD_23_24           0x00000800      /* VDD voltage 2.3 ~ 2.4 */
#define MMC_VDD_24_25           0x00001000      /* VDD voltage 2.4 ~ 2.5 */
#define MMC_VDD_25_26           0x00002000      /* VDD voltage 2.5 ~ 2.6 */
#define MMC_VDD_26_27           0x00004000      /* VDD voltage 2.6 ~ 2.7 */
#define MMC_VDD_27_28           0x00008000      /* VDD voltage 2.7 ~ 2.8 */
#define MMC_VDD_28_29           0x00010000      /* VDD voltage 2.8 ~ 2.9 */
#define MMC_VDD_29_30           0x00020000      /* VDD voltage 2.9 ~ 3.0 */
#define MMC_VDD_30_31           0x00040000      /* VDD voltage 3.0 ~ 3.1 */
#define MMC_VDD_31_32           0x00080000      /* VDD voltage 3.1 ~ 3.2 */
#define MMC_VDD_32_33           0x00100000      /* VDD voltage 3.2 ~ 3.3 */
#define MMC_VDD_33_34           0x00200000      /* VDD voltage 3.3 ~ 3.4 */
#define MMC_VDD_34_35           0x00400000      /* VDD voltage 3.4 ~ 3.5 */
#define MMC_VDD_35_36           0x00800000      /* VDD voltage 3.5 ~ 3.6 */

#define MMC_SWITCH_MODE_CMD_SET         0x00 /* Change the command set */
#define MMC_SWITCH_MODE_SET_BITS        0x01 /* Set bits in EXT_CSD byte
                                                addressed by index which are
                                                1 in value field */
#define MMC_SWITCH_MODE_CLEAR_BITS      0x02 /* Clear bits in EXT_CSD byte
                                                addressed by index, which are
                                                1 in value field */
#define MMC_SWITCH_MODE_WRITE_BYTE      0x03 /* Set target byte to value */

#define SD_SWITCH_CHECK         0
#define SD_SWITCH_SWITCH        1

/*
 * EXT_CSD fields
 */
#define EXT_CSD_ENH_START_ADDR          136     /* R/W */
#define EXT_CSD_ENH_SIZE_MULT           140     /* R/W */
#define EXT_CSD_GP_SIZE_MULT            143     /* R/W */
#define EXT_CSD_PARTITION_SETTING       155     /* R/W */
#define EXT_CSD_PARTITIONS_ATTRIBUTE    156     /* R/W */
#define EXT_CSD_MAX_ENH_SIZE_MULT       157     /* R */
#define EXT_CSD_PARTITIONING_SUPPORT    160     /* RO */
#define EXT_CSD_RST_N_FUNCTION          162     /* R/W */
#define EXT_CSD_BKOPS_EN                163     /* R/W & R/W/E */
#define EXT_CSD_WR_REL_PARAM            166     /* R */
#define EXT_CSD_WR_REL_SET              167     /* R/W */
#define EXT_CSD_RPMB_MULT               168     /* RO */
#define EXT_CSD_USER_WP                 171     /* R/W & R/W/C_P & R/W/E_P */
#define EXT_CSD_BOOT_WP                 173     /* R/W & R/W/C_P */
#define EXT_CSD_BOOT_WP_STATUS          174     /* R */
#define EXT_CSD_ERASE_GROUP_DEF         175     /* R/W */
#define EXT_CSD_BOOT_BUS_WIDTH          177
#define EXT_CSD_PART_CONF               179     /* R/W */
#define EXT_CSD_BUS_WIDTH               183     /* R/W */
#define EXT_CSD_STROBE_SUPPORT          184     /* R/W */
#define EXT_CSD_HS_TIMING               185     /* R/W */
#define EXT_CSD_REV                     192     /* RO */
#define EXT_CSD_CARD_TYPE               196     /* RO */
#define EXT_CSD_PART_SWITCH_TIME        199     /* RO */
#define EXT_CSD_SEC_CNT                 212     /* RO, 4 bytes */
#define EXT_CSD_HC_WP_GRP_SIZE          221     /* RO */
#define EXT_CSD_HC_ERASE_GRP_SIZE       224     /* RO */
#define EXT_CSD_BOOT_MULT               226     /* RO */
#define EXT_CSD_SEC_FEATURE             231     /* RO */
#define EXT_CSD_GENERIC_CMD6_TIME       248     /* RO */
#define EXT_CSD_BKOPS_SUPPORT           502     /* RO */

/*
 * EXT_CSD field definitions
 */

#define EXT_CSD_CMD_SET_NORMAL          (1 << 0)
#define EXT_CSD_CMD_SET_SECURE          (1 << 1)
#define EXT_CSD_CMD_SET_CPSECURE        (1 << 2)

#define EXT_CSD_CARD_TYPE_26    (1 << 0)        /* Card can run at 26MHz */
#define EXT_CSD_CARD_TYPE_52    (1 << 1)        /* Card can run at 52MHz */
#define EXT_CSD_CARD_TYPE_DDR_1_8V      (1 << 2)
#define EXT_CSD_CARD_TYPE_DDR_1_2V      (1 << 3)
#define EXT_CSD_CARD_TYPE_DDR_52        (EXT_CSD_CARD_TYPE_DDR_1_8V \
                                        | EXT_CSD_CARD_TYPE_DDR_1_2V)

#define EXT_CSD_CARD_TYPE_HS200_1_8V    BIT(4)  /* Card can run at 200MHz */
                                                /* SDR mode @1.8V I/O */
#define EXT_CSD_CARD_TYPE_HS200_1_2V    BIT(5)  /* Card can run at 200MHz */
                                                /* SDR mode @1.2V I/O */
#define EXT_CSD_CARD_TYPE_HS200         (EXT_CSD_CARD_TYPE_HS200_1_8V | \
                                         EXT_CSD_CARD_TYPE_HS200_1_2V)
#define EXT_CSD_CARD_TYPE_HS400_1_8V    BIT(6)
#define EXT_CSD_CARD_TYPE_HS400_1_2V    BIT(7)
#define EXT_CSD_CARD_TYPE_HS400         (EXT_CSD_CARD_TYPE_HS400_1_8V | \
                                         EXT_CSD_CARD_TYPE_HS400_1_2V)

#define EXT_CSD_BUS_WIDTH_1     0       /* Card is in 1 bit mode */
#define EXT_CSD_BUS_WIDTH_4     1       /* Card is in 4 bit mode */
#define EXT_CSD_BUS_WIDTH_8     2       /* Card is in 8 bit mode */
#define EXT_CSD_DDR_BUS_WIDTH_4 5       /* Card is in 4 bit DDR mode */
#define EXT_CSD_DDR_BUS_WIDTH_8 6       /* Card is in 8 bit DDR mode */
#define EXT_CSD_DDR_FLAG        BIT(2)  /* Flag for DDR mode */
#define EXT_CSD_BUS_WIDTH_STROBE BIT(7) /* Enhanced strobe mode */

#define EXT_CSD_TIMING_LEGACY   0       /* no high speed */
#define EXT_CSD_TIMING_HS       1       /* HS */
#define EXT_CSD_TIMING_HS200    2       /* HS200 */
#define EXT_CSD_TIMING_HS400    3       /* HS400 */
#define EXT_CSD_DRV_STR_SHIFT   4       /* Driver Strength shift */

#define EXT_CSD_BOOT_ACK_ENABLE                 (1 << 6)
#define EXT_CSD_BOOT_PARTITION_ENABLE           (1 << 3)
#define EXT_CSD_PARTITION_ACCESS_ENABLE         (1 << 0)
#define EXT_CSD_PARTITION_ACCESS_DISABLE        (0 << 0)

#define EXT_CSD_BOOT_ACK(x)             (x << 6)
#define EXT_CSD_BOOT_PART_NUM(x)        (x << 3)
#define EXT_CSD_PARTITION_ACCESS(x)     (x << 0)

#define EXT_CSD_EXTRACT_BOOT_ACK(x)             (((x) >> 6) & 0x1)
#define EXT_CSD_EXTRACT_BOOT_PART(x)            (((x) >> 3) & 0x7)
#define EXT_CSD_EXTRACT_PARTITION_ACCESS(x)     ((x) & 0x7)

#define EXT_CSD_BOOT_BUS_WIDTH_MODE(x)  (x << 3)
#define EXT_CSD_BOOT_BUS_WIDTH_RESET(x) (x << 2)
#define EXT_CSD_BOOT_BUS_WIDTH_WIDTH(x) (x)

#define EXT_CSD_PARTITION_SETTING_COMPLETED     (1 << 0)

#define EXT_CSD_ENH_USR         (1 << 0)        /* user data area is enhanced */
#define EXT_CSD_ENH_GP(x)       (1 << ((x)+1))  /* GP part (x+1) is enhanced */

#define EXT_CSD_HS_CTRL_REL     (1 << 0)        /* host controlled WR_REL_SET */

#define EXT_CSD_BOOT_WP_B_SEC_WP_SEL    (0x80)  /* enable partition selector */
#define EXT_CSD_BOOT_WP_B_PWR_WP_SEC_SEL (0x02) /* partition selector to protect */
#define EXT_CSD_BOOT_WP_B_PWR_WP_EN     (0x01)  /* power-on write-protect */

#define EXT_CSD_WR_DATA_REL_USR         (1 << 0)        /* user data area WR_REL */
#define EXT_CSD_WR_DATA_REL_GP(x)       (1 << ((x)+1))  /* GP part (x+1) WR_REL */

#define EXT_CSD_SEC_FEATURE_TRIM_EN     (1 << 4) /* Support secure & insecure trim */

#define R1_ILLEGAL_COMMAND              (1 << 22)
#define R1_APP_CMD                      (1 << 5)

#define MMC_RSP_PRESENT (1 << 0)
#define MMC_RSP_136     (1 << 1)                /* 136 bit response */
#define MMC_RSP_CRC     (1 << 2)                /* expect valid crc */
#define MMC_RSP_BUSY    (1 << 3)                /* card may send busy */
#define MMC_RSP_OPCODE  (1 << 4)                /* response contains opcode */

#define MMC_RSP_NONE    (0)
#define MMC_RSP_R1      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R1b     (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE| \
                        MMC_RSP_BUSY)
#define MMC_RSP_R2      (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
#define MMC_RSP_R3      (MMC_RSP_PRESENT)
#define MMC_RSP_R4      (MMC_RSP_PRESENT)
#define MMC_RSP_R5      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R6      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R7      (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)

#define MMCPART_NOAVAILABLE     (0xff)
#define PART_ACCESS_MASK        (0x7)
#define PART_SUPPORT            (0x1)
#define ENHNCD_SUPPORT          (0x2)
#define PART_ENH_ATTRIB         (0x1f)

#define MMC_QUIRK_RETRY_SEND_CID        BIT(0)
#define MMC_QUIRK_RETRY_SET_BLOCKLEN    BIT(1)
#define MMC_QUIRK_RETRY_APP_CMD BIT(2)

enum mmc_voltage {
        MMC_SIGNAL_VOLTAGE_000 = 0,
        MMC_SIGNAL_VOLTAGE_120 = 1,
        MMC_SIGNAL_VOLTAGE_180 = 2,
        MMC_SIGNAL_VOLTAGE_330 = 4,
};

#define MMC_ALL_SIGNAL_VOLTAGE (MMC_SIGNAL_VOLTAGE_120 |\
                                MMC_SIGNAL_VOLTAGE_180 |\
                                MMC_SIGNAL_VOLTAGE_330)

/* Maximum block size for MMC */
#define MMC_MAX_BLOCK_LEN       512

/* The number of MMC physical partitions.  These consist of:
 * boot partitions (2), general purpose partitions (4) in MMC v4.4.
 */
#define MMC_NUM_BOOT_PARTITION  2
#define MMC_PART_RPMB           3       /* RPMB partition number */

/* timing specification used */
#define MMC_TIMING_LEGACY       0
#define MMC_TIMING_MMC_HS       1
#define MMC_TIMING_SD_HS        2
#define MMC_TIMING_UHS_SDR12    3
#define MMC_TIMING_UHS_SDR25    4
#define MMC_TIMING_UHS_SDR50    5
#define MMC_TIMING_UHS_SDR104   6
#define MMC_TIMING_UHS_DDR50    7
#define MMC_TIMING_MMC_DDR52    8
#define MMC_TIMING_MMC_HS200    9
#define MMC_TIMING_MMC_HS400    10

/* Driver model support */

/**
 * struct mmc_uclass_priv - Holds information about a device used by the uclass
 */
struct mmc_uclass_priv {
        struct mmc *mmc;
};

/**
 * mmc_get_mmc_dev() - get the MMC struct pointer for a device
 *
 * Provided that the device is already probed and ready for use, this value
 * will be available.
 *
 * @dev:        Device
 * Return: associated mmc struct pointer if available, else NULL
 */
struct mmc *mmc_get_mmc_dev(const struct udevice *dev);

/* End of driver model support */

struct mmc_cid {
        unsigned long psn;
        unsigned short oid;
        unsigned char mid;
        unsigned char prv;
        unsigned char mdt;
        char pnm[7];
};

struct mmc_cmd {
        ushort cmdidx;
        uint resp_type;
        uint cmdarg;
        uint response[4];
};

struct mmc_data {
        union {
                char *dest;
                const char *src; /* src buffers don't get written to */
        };
        uint flags;
        uint blocks;
        uint blocksize;
};

/* forward decl. */
struct mmc;

#if CONFIG_IS_ENABLED(DM_MMC)
struct dm_mmc_ops {
        /**
         * deferred_probe() - Some configurations that need to be deferred
         * to just before enumerating the device
         *
         * @dev:        Device to init
         * @return 0 if Ok, -ve if error
         */
        int (*deferred_probe)(struct udevice *dev);
        /**
         * reinit() - Re-initialization to clear old configuration for
         * mmc rescan.
         *
         * @dev:        Device to reinit
         * @return 0 if Ok, -ve if error
         */
        int (*reinit)(struct udevice *dev);
        /**
         * send_cmd() - Send a command to the MMC device
         *
         * @dev:        Device to receive the command
         * @cmd:        Command to send
         * @data:       Additional data to send/receive
         * @return 0 if OK, -ve on error
         */
        int (*send_cmd)(struct udevice *dev, struct mmc_cmd *cmd,
                        struct mmc_data *data);

        /**
         * set_ios() - Set the I/O speed/width for an MMC device
         *
         * @dev:        Device to update
         * @return 0 if OK, -ve on error
         */
        int (*set_ios)(struct udevice *dev);

        /**
         * get_cd() - See whether a card is present
         *
         * @dev:        Device to check
         * @return 0 if not present, 1 if present, -ve on error
         */
        int (*get_cd)(struct udevice *dev);

        /**
         * get_wp() - See whether a card has write-protect enabled
         *
         * @dev:        Device to check
         * @return 0 if write-enabled, 1 if write-protected, -ve on error
         */
        int (*get_wp)(struct udevice *dev);

#ifdef MMC_SUPPORTS_TUNING
        /**
         * execute_tuning() - Start the tuning process
         *
         * @dev:        Device to start the tuning
         * @opcode:     Command opcode to send
         * @return 0 if OK, -ve on error
         */
        int (*execute_tuning)(struct udevice *dev, uint opcode);
#endif

        /**
         * wait_dat0() - wait until dat0 is in the target state
         *              (CLK must be running during the wait)
         *
         * @dev:        Device to check
         * @state:      target state
         * @timeout_us: timeout in us
         * @return 0 if dat0 is in the target state, -ve on error
         */
        int (*wait_dat0)(struct udevice *dev, int state, int timeout_us);

#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
        /* set_enhanced_strobe() - set HS400 enhanced strobe */
        int (*set_enhanced_strobe)(struct udevice *dev);
#endif

        /**
         * host_power_cycle - host specific tasks in power cycle sequence
         *                    Called between mmc_power_off() and
         *                    mmc_power_on()
         *
         * @dev:        Device to check
         * @return 0 if not present, 1 if present, -ve on error
         */
        int (*host_power_cycle)(struct udevice *dev);

        /**
         * get_b_max - get maximum length of single transfer
         *             Called before reading blocks from the card,
         *             useful for system which have e.g. DMA limits
         *             on various memory ranges.
         *
         * @dev:        Device to check
         * @dst:        Destination buffer in memory
         * @blkcnt:     Total number of blocks in this transfer
         * @return maximum number of blocks for this transfer
         */
        int (*get_b_max)(struct udevice *dev, void *dst, lbaint_t blkcnt);

        /**
         * hs400_prepare_ddr - prepare to switch to DDR mode
         *
         * @dev:        Device to check
         * @return 0 if success, -ve on error
         */
        int (*hs400_prepare_ddr)(struct udevice *dev);
};

#define mmc_get_ops(dev)        ((struct dm_mmc_ops *)(dev)->driver->ops)

/* Transition functions for compatibility */
int mmc_set_ios(struct mmc *mmc);
int mmc_getcd(struct mmc *mmc);
int mmc_getwp(struct mmc *mmc);
int mmc_execute_tuning(struct mmc *mmc, uint opcode);
int mmc_wait_dat0(struct mmc *mmc, int state, int timeout_us);
int mmc_set_enhanced_strobe(struct mmc *mmc);
int mmc_host_power_cycle(struct mmc *mmc);
int mmc_deferred_probe(struct mmc *mmc);
int mmc_reinit(struct mmc *mmc);
int mmc_get_b_max(struct mmc *mmc, void *dst, lbaint_t blkcnt);
int mmc_hs400_prepare_ddr(struct mmc *mmc);
int mmc_send_stop_transmission(struct mmc *mmc, bool write);

#else
struct mmc_ops {
        int (*send_cmd)(struct mmc *mmc,
                        struct mmc_cmd *cmd, struct mmc_data *data);
        int (*set_ios)(struct mmc *mmc);
        int (*init)(struct mmc *mmc);
        int (*getcd)(struct mmc *mmc);
        int (*getwp)(struct mmc *mmc);
        int (*host_power_cycle)(struct mmc *mmc);
        int (*get_b_max)(struct mmc *mmc, void *dst, lbaint_t blkcnt);
        int (*wait_dat0)(struct mmc *mmc, int state, int timeout_us);
};

static inline int mmc_hs400_prepare_ddr(struct mmc *mmc)
{
        return 0;
}
#endif

struct mmc_config {
        const char *name;
#if !CONFIG_IS_ENABLED(DM_MMC)
        const struct mmc_ops *ops;
#endif
        uint host_caps;
        uint voltages;
        uint f_min;
        uint f_max;
        uint b_max;
        unsigned char part_type;
#ifdef CONFIG_MMC_PWRSEQ
        struct udevice *pwr_dev;
#endif
};

struct sd_ssr {
        unsigned int au;                /* In sectors */
        unsigned int erase_timeout;     /* In milliseconds */
        unsigned int erase_offset;      /* In milliseconds */
};

enum bus_mode {
        MMC_LEGACY,
        MMC_HS,
        SD_HS,
        MMC_HS_52,
        MMC_DDR_52,
        UHS_SDR12,
        UHS_SDR25,
        UHS_SDR50,
        UHS_DDR50,
        UHS_SDR104,
        MMC_HS_200,
        MMC_HS_400,
        MMC_HS_400_ES,
        MMC_MODES_END
};

const char *mmc_mode_name(enum bus_mode mode);
void mmc_dump_capabilities(const char *text, uint caps);

static inline bool mmc_is_mode_ddr(enum bus_mode mode)
{
        if (mode == MMC_DDR_52)
                return true;
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
        else if (mode == UHS_DDR50)
                return true;
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
        else if (mode == MMC_HS_400)
                return true;
#endif
#if CONFIG_IS_ENABLED(MMC_HS400_ES_SUPPORT)
        else if (mode == MMC_HS_400_ES)
                return true;
#endif
        else
                return false;
}

#define UHS_CAPS (MMC_CAP(UHS_SDR12) | MMC_CAP(UHS_SDR25) | \
                  MMC_CAP(UHS_SDR50) | MMC_CAP(UHS_SDR104) | \
                  MMC_CAP(UHS_DDR50))

static inline bool supports_uhs(uint caps)
{
#if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT)
        return (caps & UHS_CAPS) ? true : false;
#else
        return false;
#endif
}

/*
 * With CONFIG_DM_MMC enabled, struct mmc can be accessed from the MMC device
 * with mmc_get_mmc_dev().
 *
 * TODO struct mmc should be in mmc_private but it's hard to fix right now
 */
struct mmc {
#if !CONFIG_IS_ENABLED(BLK)
        struct list_head link;
#endif
        const struct mmc_config *cfg;   /* provided configuration */
        uint version;
        void *priv;
        uint has_init;
        int high_capacity;
        bool clk_disable; /* true if the clock can be turned off */
        uint bus_width;
        uint clock;
        uint saved_clock;
        enum mmc_voltage signal_voltage;
        uint card_caps;
        uint host_caps;
        uint ocr;
        uint dsr;
        uint dsr_imp;
        uint scr[2];
        uint csd[4];
        uint cid[4];
        ushort rca;
        u8 part_support;
        u8 part_attr;
        u8 wr_rel_set;
        u8 part_config;
        u8 gen_cmd6_time;       /* units: 10 ms */
        u8 part_switch_time;    /* units: 10 ms */
        uint tran_speed;
        uint legacy_speed; /* speed for the legacy mode provided by the card */
        uint read_bl_len;
        bool can_trim;
#if CONFIG_IS_ENABLED(MMC_WRITE)
        uint write_bl_len;
        uint erase_grp_size;    /* in 512-byte sectors */
#endif
#if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING)
        uint hc_wp_grp_size;    /* in 512-byte sectors */
#endif
#if CONFIG_IS_ENABLED(MMC_WRITE)
        struct sd_ssr   ssr;    /* SD status register */
#endif
        u64 capacity;
        u64 capacity_user;
        u64 capacity_boot;
        u64 capacity_rpmb;
        u64 capacity_gp[4];
#ifndef CONFIG_SPL_BUILD
        u64 enh_user_start;
        u64 enh_user_size;
#endif
#if !CONFIG_IS_ENABLED(BLK)
        struct blk_desc block_dev;
#endif
        char op_cond_pending;   /* 1 if we are waiting on an op_cond command */
        char init_in_progress;  /* 1 if we have done mmc_start_init() */
        char preinit;           /* start init as early as possible */
        int ddr_mode;
#if CONFIG_IS_ENABLED(DM_MMC)
        struct udevice *dev;    /* Device for this MMC controller */
#if CONFIG_IS_ENABLED(DM_REGULATOR)
        struct udevice *vmmc_supply;    /* Main voltage regulator (Vcc)*/
        struct udevice *vqmmc_supply;   /* IO voltage regulator (Vccq)*/
#endif
#endif
        u8 *ext_csd;
        u32 cardtype;           /* cardtype read from the MMC */
        enum mmc_voltage current_voltage;
        enum bus_mode selected_mode; /* mode currently used */
        enum bus_mode best_mode; /* best mode is the supported mode with the
                                  * highest bandwidth. It may not always be the
                                  * operating mode due to limitations when
                                  * accessing the boot partitions
                                  */
        u32 quirks;
        u8 hs400_tuning;

        enum bus_mode user_speed_mode; /* input speed mode from user */
};

#if CONFIG_IS_ENABLED(DM_MMC)
#define mmc_to_dev(_mmc)        _mmc->dev
#else
#define mmc_to_dev(_mmc)        NULL
#endif

struct mmc_hwpart_conf {
        struct {
                uint enh_start; /* in 512-byte sectors */
                uint enh_size;  /* in 512-byte sectors, if 0 no enh area */
                unsigned wr_rel_change : 1;
                unsigned wr_rel_set : 1;
        } user;
        struct {
                uint size;      /* in 512-byte sectors */
                unsigned enhanced : 1;
                unsigned wr_rel_change : 1;
                unsigned wr_rel_set : 1;
        } gp_part[4];
};

enum mmc_hwpart_conf_mode {
        MMC_HWPART_CONF_CHECK,
        MMC_HWPART_CONF_SET,
        MMC_HWPART_CONF_COMPLETE,
};

struct mmc *mmc_create(const struct mmc_config *cfg, void *priv);

/**
 * mmc_bind() - Set up a new MMC device ready for probing
 *
 * A child block device is bound with the UCLASS_MMC interface type. This
 * allows the device to be used with CONFIG_BLK
 *
 * @dev:        MMC device to set up
 * @mmc:        MMC struct
 * @cfg:        MMC configuration
 * Return: 0 if OK, -ve on error
 */
int mmc_bind(struct udevice *dev, struct mmc *mmc,
             const struct mmc_config *cfg);
void mmc_destroy(struct mmc *mmc);

/**
 * mmc_unbind() - Unbind a MMC device's child block device
 *
 * @dev:        MMC device
 * Return: 0 if OK, -ve on error
 */
int mmc_unbind(struct udevice *dev);
int mmc_initialize(struct bd_info *bis);
int mmc_init_device(int num);
int mmc_init(struct mmc *mmc);
int mmc_send_tuning(struct mmc *mmc, u32 opcode, int *cmd_error);
int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data);
int mmc_deinit(struct mmc *mmc);

/**
 * mmc_of_parse() - Parse the device tree to get the capabilities of the host
 *
 * @dev:        MMC device
 * @cfg:        MMC configuration
 * Return: 0 if OK, -ve on error
 */
int mmc_of_parse(struct udevice *dev, struct mmc_config *cfg);

#ifdef CONFIG_MMC_PWRSEQ
/**
 * mmc_pwrseq_get_power() - get a power device from device tree
 *
 * @dev:        MMC device
 * @cfg:        MMC configuration
 * Return: 0 if OK, -ve on error
 */
int mmc_pwrseq_get_power(struct udevice *dev, struct mmc_config *cfg);
#endif

int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size);

/**
 * mmc_voltage_to_mv() - Convert a mmc_voltage in mV
 *
 * @voltage:    The mmc_voltage to convert
 * Return: the value in mV if OK, -EINVAL on error (invalid mmc_voltage value)
 */
int mmc_voltage_to_mv(enum mmc_voltage voltage);

/**
 * mmc_set_clock() - change the bus clock
 * @mmc:        MMC struct
 * @clock:      bus frequency in Hz
 * @disable:    flag indicating if the clock must on or off
 * Return: 0 if OK, -ve on error
 */
int mmc_set_clock(struct mmc *mmc, uint clock, bool disable);

#define MMC_CLK_ENABLE          false
#define MMC_CLK_DISABLE         true

struct mmc *find_mmc_device(int dev_num);
int mmc_set_dev(int dev_num);
void print_mmc_devices(char separator);

/**
 * get_mmc_num() - get the total MMC device number
 *
 * Return: 0 if there is no MMC device, else the number of devices
 */
int get_mmc_num(void);
int mmc_switch_part(struct mmc *mmc, unsigned int part_num);
int mmc_hwpart_config(struct mmc *mmc, const struct mmc_hwpart_conf *conf,
                      enum mmc_hwpart_conf_mode mode);

#if !CONFIG_IS_ENABLED(DM_MMC)
int mmc_getcd(struct mmc *mmc);
int board_mmc_getcd(struct mmc *mmc);
int mmc_getwp(struct mmc *mmc);
int board_mmc_getwp(struct mmc *mmc);
#endif

int mmc_set_dsr(struct mmc *mmc, u16 val);
/* Function to change the size of boot partition and rpmb partitions */
int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
                                        unsigned long rpmbsize);
/* Function to modify the PARTITION_CONFIG field of EXT_CSD */
int mmc_set_part_conf(struct mmc *mmc, u8 ack, u8 part_num, u8 access);
/* Function to modify the BOOT_BUS_WIDTH field of EXT_CSD */
int mmc_set_boot_bus_width(struct mmc *mmc, u8 width, u8 reset, u8 mode);
/* Function to modify the RST_n_FUNCTION field of EXT_CSD */
int mmc_set_rst_n_function(struct mmc *mmc, u8 enable);
/* Functions to read / write the RPMB partition */
int mmc_rpmb_set_key(struct mmc *mmc, void *key);
int mmc_rpmb_get_counter(struct mmc *mmc, unsigned long *counter);
int mmc_rpmb_read(struct mmc *mmc, void *addr, unsigned short blk,
                  unsigned short cnt, unsigned char *key);
int mmc_rpmb_write(struct mmc *mmc, void *addr, unsigned short blk,
                   unsigned short cnt, unsigned char *key);

/**
 * mmc_rpmb_route_frames() - route RPMB data frames
 * @mmc         Pointer to a MMC device struct
 * @req         Request data frames
 * @reqlen      Length of data frames in bytes
 * @rsp         Supplied buffer for response data frames
 * @rsplen      Length of supplied buffer for response data frames
 *
 * The RPMB data frames are routed to/from some external entity, for
 * example a Trusted Exectuion Environment in an arm TrustZone protected
 * secure world. It's expected that it's the external entity who is in
 * control of the RPMB key.
 *
 * Returns 0 on success, < 0 on error.
 */
int mmc_rpmb_route_frames(struct mmc *mmc, void *req, unsigned long reqlen,
                          void *rsp, unsigned long rsplen);

/**
 * mmc_set_bkops_enable() - enable background operations
 * @param mmc           Pointer to a MMC device struct
 * @param autobkops     Enable automatic bkops, not manual bkops
 * @param enable        Enable bkops, not disable
 *
 * Enable or disable automatic or manual background operation of the eMMC.
 *
 * Return: 0 on success, <0 on error.
 */
int mmc_set_bkops_enable(struct mmc *mmc, bool autobkops, bool enable);

/**
 * Start device initialization and return immediately; it does not block on
 * polling OCR (operation condition register) status. Useful for checking
 * the presence of SD/eMMC when no card detect logic is available.
 *
 * @param mmc   Pointer to a MMC device struct
 * @param quiet Be quiet, do not print error messages when card is not detected.
 * Return: 0 on success, <0 on error.
 */
int mmc_get_op_cond(struct mmc *mmc, bool quiet);

/**
 * Start device initialization and return immediately; it does not block on
 * polling OCR (operation condition register) status.  Then you should call
 * mmc_init, which would block on polling OCR status and complete the device
 * initializatin.
 *
 * @param mmc   Pointer to a MMC device struct
 * Return: 0 on success, <0 on error.
 */
int mmc_start_init(struct mmc *mmc);

/**
 * Set preinit flag of mmc device.
 *
 * This will cause the device to be pre-inited during mmc_initialize(),
 * which may save boot time if the device is not accessed until later.
 * Some eMMC devices take 200-300ms to init, but unfortunately they
 * must be sent a series of commands to even get them to start preparing
 * for operation.
 *
 * @param mmc           Pointer to a MMC device struct
 * @param preinit       preinit flag value
 */
void mmc_set_preinit(struct mmc *mmc, int preinit);

#ifdef CONFIG_MMC_SPI
#define mmc_host_is_spi(mmc)    ((mmc)->cfg->host_caps & MMC_MODE_SPI)
#else
#define mmc_host_is_spi(mmc)    0
#endif

#define mmc_dev(x)      ((x)->dev)

void board_mmc_power_init(void);
int board_mmc_init(struct bd_info *bis);
int cpu_mmc_init(struct bd_info *bis);
int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr);
# ifdef CONFIG_SYS_MMC_ENV_PART
extern uint mmc_get_env_part(struct mmc *mmc);
# endif
int mmc_get_env_dev(void);

/* Minimum partition switch timeout in units of 10-milliseconds */
#define MMC_MIN_PART_SWITCH_TIME        30 /* 300 ms */

/**
 * mmc_get_blk_desc() - Get the block descriptor for an MMC device
 *
 * @mmc:        MMC device
 * Return: block descriptor if found, else NULL
 */
struct blk_desc *mmc_get_blk_desc(struct mmc *mmc);

/**
 * mmc_get_blk() - Get the block device for an MMC device
 *
 * @dev:        MMC device
 * @blkp:       Returns pointer to probed block device on sucesss
 *
 * Return: 0 on success, -ve on error
 */
int mmc_get_blk(struct udevice *dev, struct udevice **blkp);

/**
 * mmc_send_ext_csd() - read the extended CSD register
 *
 * @mmc:        MMC device
 * @ext_csd     a cache aligned buffer of length MMC_MAX_BLOCK_LEN allocated by
 *              the caller, e.g. using
 *              ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN)
 * Return:      0 for success
 */
int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd);

/**
 * mmc_boot_wp() - power on write protect boot partitions
 *
 * The boot partitions are write protected until the next power cycle.
 *
 * Return:      0 for success
 */
int mmc_boot_wp(struct mmc *mmc);

/**
 * mmc_boot_wp_single_partition() - set write protection to a boot partition.
 *
 * This function sets a single boot partition to protect and leave the
 * other partition writable.
 *
 * @param mmc the mmc device.
 * @param partition 0 - first boot partition, 1 - second boot partition.
 * @return 0 for success
 */
int mmc_boot_wp_single_partition(struct mmc *mmc, int partition);

static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
{
        return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
}

#endif /* _MMC_H_ */