include/mmc.h - platform/external/u-boot - Gitiles

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

 #ifndef _MMC_H_
 #define _MMC_H_

 #include <linux/list.h>
 #include <linux/compiler.h>
 #include <part.h>

 #define SD_VERSION_SD	0x20000
 #define SD_VERSION_3	(SD_VERSION_SD | 0x300)
 #define SD_VERSION_2	(SD_VERSION_SD | 0x200)
 #define SD_VERSION_1_0	(SD_VERSION_SD | 0x100)
 #define SD_VERSION_1_10	(SD_VERSION_SD | 0x10a)
 #define MMC_VERSION_MMC		0x10000
 #define MMC_VERSION_UNKNOWN	(MMC_VERSION_MMC)
 #define MMC_VERSION_1_2		(MMC_VERSION_MMC | 0x102)
 #define MMC_VERSION_1_4		(MMC_VERSION_MMC | 0x104)
 #define MMC_VERSION_2_2		(MMC_VERSION_MMC | 0x202)
 #define MMC_VERSION_3		(MMC_VERSION_MMC | 0x300)
 #define MMC_VERSION_4		(MMC_VERSION_MMC | 0x400)
 #define MMC_VERSION_4_1		(MMC_VERSION_MMC | 0x401)
 #define MMC_VERSION_4_2		(MMC_VERSION_MMC | 0x402)
 #define MMC_VERSION_4_3		(MMC_VERSION_MMC | 0x403)
 #define MMC_VERSION_4_41	(MMC_VERSION_MMC | 0x429)
 #define MMC_VERSION_4_5		(MMC_VERSION_MMC | 0x405)

 #define MMC_MODE_HS		(1 << 0)
 #define MMC_MODE_HS_52MHz	(1 << 1)
 #define MMC_MODE_4BIT		(1 << 2)
 #define MMC_MODE_8BIT		(1 << 3)
 #define MMC_MODE_SPI		(1 << 4)
 #define MMC_MODE_HC		(1 << 5)
 #define MMC_MODE_DDR_52MHz	(1 << 6)

 #define SD_DATA_4BIT	0x00040000

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

 #define MMC_DATA_READ		1
 #define MMC_DATA_WRITE		2

 #define NO_CARD_ERR		-16 /* No SD/MMC card inserted */
 #define UNUSABLE_ERR		-17 /* Unusable Card */
 #define COMM_ERR		-18 /* Communications Error */
 #define TIMEOUT			-19
 #define IN_PROGRESS		-20 /* operation is in progress */

 #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_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_APP_SET_BUS_WIDTH	6
 #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

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

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

 #define SECURE_ERASE		0x80000000

 #define MMC_STATUS_MASK		(~0x0206BF7F)
 #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_GP_SIZE_MULT		143	/* R/W */
 #define EXT_CSD_PARTITIONS_ATTRIBUTE	156	/* R/W */
 #define EXT_CSD_PARTITIONING_SUPPORT	160	/* RO */
 #define EXT_CSD_RST_N_FUNCTION		162	/* 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_HS_TIMING		185	/* R/W */
 #define EXT_CSD_REV			192	/* RO */
 #define EXT_CSD_CARD_TYPE		196	/* 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 */

 /*
  * 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_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_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_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 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 PART_ENH_ATTRIB		(0x1f)

 /* 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

 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;

 struct mmc_ops {
 	int (*send_cmd)(struct mmc *mmc,
 			struct mmc_cmd *cmd, struct mmc_data *data);
 	void (*set_ios)(struct mmc *mmc);
 	int (*init)(struct mmc *mmc);
 	int (*getcd)(struct mmc *mmc);
 	int (*getwp)(struct mmc *mmc);
 };

 struct mmc_config {
 	const char *name;
 	const struct mmc_ops *ops;
 	uint host_caps;
 	uint voltages;
 	uint f_min;
 	uint f_max;
 	uint b_max;
 	unsigned char part_type;
 };

 /* TODO struct mmc should be in mmc_private but it's hard to fix right now */
 struct mmc {
 	struct list_head link;
 	const struct mmc_config *cfg;	/* provided configuration */
 	uint version;
 	void *priv;
 	uint has_init;
 	int high_capacity;
 	uint bus_width;
 	uint clock;
 	uint card_caps;
 	uint ocr;
 	uint dsr;
 	uint dsr_imp;
 	uint scr[2];
 	uint csd[4];
 	uint cid[4];
 	ushort rca;
 	char part_config;
 	char part_num;
 	uint tran_speed;
 	uint read_bl_len;
 	uint write_bl_len;
 	uint erase_grp_size;
 	u64 capacity;
 	u64 capacity_user;
 	u64 capacity_boot;
 	u64 capacity_rpmb;
 	u64 capacity_gp[4];
 	block_dev_desc_t block_dev;
 	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 */
 	uint op_cond_response;	/* the response byte from the last op_cond */
 };

 int mmc_register(struct mmc *mmc);
 struct mmc *mmc_create(const struct mmc_config *cfg, void *priv);
 void mmc_destroy(struct mmc *mmc);
 int mmc_initialize(bd_t *bis);
 int mmc_init(struct mmc *mmc);
 int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size);
 void mmc_set_clock(struct mmc *mmc, uint clock);
 struct mmc *find_mmc_device(int dev_num);
 int mmc_set_dev(int dev_num);
 void print_mmc_devices(char separator);
 int get_mmc_num(void);
 int board_mmc_getcd(struct mmc *mmc);
 int mmc_switch_part(int dev_num, unsigned int part_num);
 int mmc_getcd(struct mmc *mmc);
 int mmc_getwp(struct mmc *mmc);
 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);

 /**
  * 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, IN_PROGRESS on waiting for OCR status, <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_GENERIC_MMC
 #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
 struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode);
 #else
 int mmc_legacy_init(int verbose);
 #endif

 int board_mmc_init(bd_t *bis);

 /* 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

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

	#ifndef _MMC_H_
	#define _MMC_H_

	#include <linux/list.h>
	#include <linux/compiler.h>
	#include <part.h>

	#define SD_VERSION_SD 0x20000
	#define SD_VERSION_3 (SD_VERSION_SD \| 0x300)
	#define SD_VERSION_2 (SD_VERSION_SD \| 0x200)
	#define SD_VERSION_1_0 (SD_VERSION_SD \| 0x100)
	#define SD_VERSION_1_10 (SD_VERSION_SD \| 0x10a)
	#define MMC_VERSION_MMC 0x10000
	#define MMC_VERSION_UNKNOWN (MMC_VERSION_MMC)
	#define MMC_VERSION_1_2 (MMC_VERSION_MMC \| 0x102)
	#define MMC_VERSION_1_4 (MMC_VERSION_MMC \| 0x104)
	#define MMC_VERSION_2_2 (MMC_VERSION_MMC \| 0x202)
	#define MMC_VERSION_3 (MMC_VERSION_MMC \| 0x300)
	#define MMC_VERSION_4 (MMC_VERSION_MMC \| 0x400)
	#define MMC_VERSION_4_1 (MMC_VERSION_MMC \| 0x401)
	#define MMC_VERSION_4_2 (MMC_VERSION_MMC \| 0x402)
	#define MMC_VERSION_4_3 (MMC_VERSION_MMC \| 0x403)
	#define MMC_VERSION_4_41 (MMC_VERSION_MMC \| 0x429)
	#define MMC_VERSION_4_5 (MMC_VERSION_MMC \| 0x405)

	#define MMC_MODE_HS (1 << 0)
	#define MMC_MODE_HS_52MHz (1 << 1)
	#define MMC_MODE_4BIT (1 << 2)
	#define MMC_MODE_8BIT (1 << 3)
	#define MMC_MODE_SPI (1 << 4)
	#define MMC_MODE_HC (1 << 5)
	#define MMC_MODE_DDR_52MHz (1 << 6)

	#define SD_DATA_4BIT 0x00040000

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

	#define MMC_DATA_READ 1
	#define MMC_DATA_WRITE 2

	#define NO_CARD_ERR -16 /* No SD/MMC card inserted */
	#define UNUSABLE_ERR -17 /* Unusable Card */
	#define COMM_ERR -18 /* Communications Error */
	#define TIMEOUT -19
	#define IN_PROGRESS -20 /* operation is in progress */

	#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_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_APP_SET_BUS_WIDTH 6
	#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

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

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

	#define SECURE_ERASE 0x80000000

	#define MMC_STATUS_MASK (~0x0206BF7F)
	#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_GP_SIZE_MULT 143 /* R/W */
	#define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */
	#define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */
	#define EXT_CSD_RST_N_FUNCTION 162 /* 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_HS_TIMING 185 /* R/W */
	#define EXT_CSD_REV 192 /* RO */
	#define EXT_CSD_CARD_TYPE 196 /* 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 */

	/*
	* 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_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_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_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 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 PART_ENH_ATTRIB (0x1f)

	/* 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

	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;

	struct mmc_ops {
	int (send_cmd)(struct mmc mmc,
	struct mmc_cmd cmd, struct mmc_data data);
	void (set_ios)(struct mmc mmc);
	int (init)(struct mmc mmc);
	int (getcd)(struct mmc mmc);
	int (getwp)(struct mmc mmc);
	};

	struct mmc_config {
	const char *name;
	const struct mmc_ops *ops;
	uint host_caps;
	uint voltages;
	uint f_min;
	uint f_max;
	uint b_max;
	unsigned char part_type;
	};

	/* TODO struct mmc should be in mmc_private but it's hard to fix right now */
	struct mmc {
	struct list_head link;
	const struct mmc_config cfg; / provided configuration */
	uint version;
	void *priv;
	uint has_init;
	int high_capacity;
	uint bus_width;
	uint clock;
	uint card_caps;
	uint ocr;
	uint dsr;
	uint dsr_imp;
	uint scr[2];
	uint csd[4];
	uint cid[4];
	ushort rca;
	char part_config;
	char part_num;
	uint tran_speed;
	uint read_bl_len;
	uint write_bl_len;
	uint erase_grp_size;
	u64 capacity;
	u64 capacity_user;
	u64 capacity_boot;
	u64 capacity_rpmb;
	u64 capacity_gp[4];
	block_dev_desc_t block_dev;
	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 */
	uint op_cond_response; /* the response byte from the last op_cond */
	};

	int mmc_register(struct mmc *mmc);
	struct mmc mmc_create(const struct mmc_config cfg, void *priv);
	void mmc_destroy(struct mmc *mmc);
	int mmc_initialize(bd_t *bis);
	int mmc_init(struct mmc *mmc);
	int mmc_read(struct mmc mmc, u64 src, uchar dst, int size);
	void mmc_set_clock(struct mmc *mmc, uint clock);
	struct mmc *find_mmc_device(int dev_num);
	int mmc_set_dev(int dev_num);
	void print_mmc_devices(char separator);
	int get_mmc_num(void);
	int board_mmc_getcd(struct mmc *mmc);
	int mmc_switch_part(int dev_num, unsigned int part_num);
	int mmc_getcd(struct mmc *mmc);
	int mmc_getwp(struct mmc *mmc);
	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);

	/**
	* 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, IN_PROGRESS on waiting for OCR status, <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_GENERIC_MMC
	#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
	struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode);
	#else
	int mmc_legacy_init(int verbose);
	#endif

	int board_mmc_init(bd_t *bis);

	/* 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

	#endif /* _MMC_H_ */