/* SPDX-License-Identifier: GPL-2.0+ */

  /*

   * Copyright 2008,2010 Freescale Semiconductor, Inc

   * Copyright 2020 NXP

   * Andy Fleming
   *
   * Based (loosely) on the Linux code

   */
  
  #ifndef _MMC_H_
  #define _MMC_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_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_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_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_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 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 */

  /* 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(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);
  	/**

  	 * 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);
  	/**

  	 * 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);

  };
  
  #define mmc_get_ops(dev)        ((struct dm_mmc_ops *)(dev)->driver->ops)
  
  int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
  		    struct mmc_data *data);
  int dm_mmc_set_ios(struct udevice *dev);
  int dm_mmc_get_cd(struct udevice *dev);
  int dm_mmc_get_wp(struct udevice *dev);

  int dm_mmc_execute_tuning(struct udevice *dev, uint opcode);

  int dm_mmc_wait_dat0(struct udevice *dev, int state, int timeout_us);

  int dm_mmc_host_power_cycle(struct udevice *dev);

  int dm_mmc_deferred_probe(struct udevice *dev);

  int dm_mmc_reinit(struct udevice *dev);

  
  /* 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_hs400_prepare_ddr(struct mmc *mmc);

  int mmc_reinit(struct mmc *mmc);

  
  #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);

  };

  
  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;
  };

  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;

  #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;

  };

  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 IF_TYPE_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);

  #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
      CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
      CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
  int mmc_deinit(struct mmc *mmc);
  #endif

  /**
   * 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);

  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);

  #ifdef CONFIG_CMD_BKOPS_ENABLE
  int mmc_set_bkops_enable(struct mmc *mmc);
  #endif

  /**
   * 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
   * @return 0 on success, <0 on error.
   */
  int mmc_get_op_cond(struct mmc *mmc);
  
  /**
   * 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

  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 */

  /* Set block count limit because of 16 bit register limit on some hardware*/
  #ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
  #define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
  #endif

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

  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_ */