/*

   * Copyright 2008,2010 Freescale Semiconductor, Inc

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

   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of

   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  #ifndef _MMC_H_
  #define _MMC_H_

  #include <linux/list.h>
  
  #define SD_VERSION_SD	0x20000
  #define SD_VERSION_2	(SD_VERSION_SD | 0x20)
  #define SD_VERSION_1_0	(SD_VERSION_SD | 0x10)
  #define SD_VERSION_1_10	(SD_VERSION_SD | 0x1a)
  #define MMC_VERSION_MMC		0x10000
  #define MMC_VERSION_UNKNOWN	(MMC_VERSION_MMC)
  #define MMC_VERSION_1_2		(MMC_VERSION_MMC | 0x12)
  #define MMC_VERSION_1_4		(MMC_VERSION_MMC | 0x14)
  #define MMC_VERSION_2_2		(MMC_VERSION_MMC | 0x22)
  #define MMC_VERSION_3		(MMC_VERSION_MMC | 0x30)
  #define MMC_VERSION_4		(MMC_VERSION_MMC | 0x40)
  
  #define MMC_MODE_HS		0x001
  #define MMC_MODE_HS_52MHz	0x010
  #define MMC_MODE_4BIT		0x100
  #define MMC_MODE_8BIT		0x200

  #define MMC_MODE_SPI		0x400

  #define MMC_MODE_HC		0x800

  #define MMC_MODE_MASK_WIDTH_BITS (MMC_MODE_4BIT | MMC_MODE_8BIT)
  #define MMC_MODE_WIDTH_BITS_SHIFT 8

  #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 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 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 MMC_HS_TIMING		0x00000100
  #define MMC_HS_52MHZ		0x2

  #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_PARTITIONING_SUPPORT	160	/* RO */
  #define EXT_CSD_ERASE_GROUP_DEF		175	/* R/W */
  #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_ERASE_GRP_SIZE	224	/* 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_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 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)

  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];

  	uint flags;
  };
  
  struct mmc_data {
  	union {
  		char *dest;
  		const char *src; /* src buffers don't get written to */
  	};
  	uint flags;
  	uint blocks;
  	uint blocksize;
  };
  
  struct mmc {
  	struct list_head link;
  	char name[32];
  	void *priv;
  	uint voltages;
  	uint version;

  	uint has_init;

  	uint f_min;
  	uint f_max;
  	int high_capacity;
  	uint bus_width;
  	uint clock;
  	uint card_caps;
  	uint host_caps;
  	uint ocr;
  	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;
  	block_dev_desc_t block_dev;
  	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);

  	uint b_max;

  };
  
  int mmc_register(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);

  #ifdef CONFIG_GENERIC_MMC

  #define mmc_host_is_spi(mmc)	((mmc)->host_caps & MMC_MODE_SPI)
  struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode);

  #else

  int mmc_legacy_init(int verbose);
  #endif

  #endif /* _MMC_H_ */