/*-
 * Copyright (c) 2006 M. Warner Losh.  All rights reserved.
 * Copyright (c) 2017 Marius Strobl <marius@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Portions of this software may have been developed with reference to
 * the SD Simplified Specification.  The following disclaimer may apply:
 *
 * The following conditions apply to the release of the simplified
 * specification ("Simplified Specification") by the SD Card Association and
 * the SD Group. The Simplified Specification is a subset of the complete SD
 * Specification which is owned by the SD Card Association and the SD
 * Group. This Simplified Specification is provided on a non-confidential
 * basis subject to the disclaimers below. Any implementation of the
 * Simplified Specification may require a license from the SD Card
 * Association, SD Group, SD-3C LLC or other third parties.
 *
 * Disclaimers:
 *
 * The information contained in the Simplified Specification is presented only
 * as a standard specification for SD Cards and SD Host/Ancillary products and
 * is provided "AS-IS" without any representations or warranties of any
 * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
 * Card Association for any damages, any infringements of patents or other
 * right of the SD Group, SD-3C LLC, the SD Card Association or any third
 * parties, which may result from its use. No license is granted by
 * implication, estoppel or otherwise under any patent or other rights of the
 * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
 * herein shall be construed as an obligation by the SD Group, the SD-3C LLC
 * or the SD Card Association to disclose or distribute any technical
 * information, know-how or other confidential information to any third party.
 *
 * $FreeBSD: src/sys/dev/mmc/mmcreg.h,v 1.8 2009/02/03 04:28:45 imp Exp $
 */

#ifndef BUS_MMC_MMCREG_H
#define BUS_MMC_MMCREG_H

/*
 * This file contains the register definitions for the mmc and sd busses.
 * They are taken from publicly available sources.
 */

struct mmc_data;
struct mmc_request;

struct mmc_command {
        uint32_t        opcode;
        uint32_t        arg;
        uint32_t        resp[4];
        uint32_t        flags;          /* Expected responses */
#define MMC_RSP_PRESENT (1ul << 0)      /* Response */
#define MMC_RSP_136     (1ul << 1)      /* 136 bit response */
#define MMC_RSP_CRC     (1ul << 2)      /* Expect valid crc */
#define MMC_RSP_BUSY    (1ul << 3)      /* Card may send busy */
#define MMC_RSP_OPCODE  (1ul << 4)      /* Response include opcode */
#define MMC_RSP_MASK    0x1ful
#define MMC_CMD_AC      (0ul << 5)      /* Addressed Command, no data */
#define MMC_CMD_ADTC    (1ul << 5)      /* Addressed Data transfer cmd */
#define MMC_CMD_BC      (2ul << 5)      /* Broadcast command, no response */
#define MMC_CMD_BCR     (3ul << 5)      /* Broadcast command with response */
#define MMC_CMD_MASK    (3ul << 5)

/* Possible response types defined in the standard: */
#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_R6      (MMC_RSP_PRESENT | MMC_RSP_CRC)
#define MMC_RSP_R7      (MMC_RSP_PRESENT | MMC_RSP_CRC)
#define MMC_RSP(x)      ((x) & MMC_RSP_MASK)
        uint32_t        retries;
        uint32_t        error;
#define MMC_ERR_NONE    0
#define MMC_ERR_TIMEOUT 1
#define MMC_ERR_BADCRC  2
#define MMC_ERR_FIFO    3
#define MMC_ERR_FAILED  4
#define MMC_ERR_INVALID 5
#define MMC_ERR_NO_MEMORY 6
#define MMC_ERR_MAX     6
        struct mmc_data *data;          /* Data segment with cmd */
        struct mmc_request *mrq;        /* backpointer to request */
};

/*
 * R1 responses
 *
 * Types (per SD 2.0 standard)
 *      e : error bit
 *      s : status bit
 *      r : detected and set for the actual command response
 *      x : Detected and set during command execution.  The host can get
 *          the status by issuing a command with R1 response.
 *
 * Clear Condition (per SD 2.0 standard)
 *      a : according to the card current state.
 *      b : always related to the previous command.  reception of a valid
 *          command will clear it (with a delay of one command).
 *      c : clear by read
 */
#define R1_OUT_OF_RANGE (1u << 31)              /* erx, c */
#define R1_ADDRESS_ERROR (1u << 30)             /* erx, c */
#define R1_BLOCK_LEN_ERROR (1u << 29)           /* erx, c */
#define R1_ERASE_SEQ_ERROR (1u << 28)           /* er, c */
#define R1_ERASE_PARAM (1u << 27)               /* erx, c */
#define R1_WP_VIOLATION (1u << 26)              /* erx, c */
#define R1_CARD_IS_LOCKED (1u << 25)            /* sx, a */
#define R1_LOCK_UNLOCK_FAILED (1u << 24)        /* erx, c */
#define R1_COM_CRC_ERROR (1u << 23)             /* er, b */
#define R1_ILLEGAL_COMMAND (1u << 22)           /* er, b */
#define R1_CARD_ECC_FAILED (1u << 21)           /* erx, c */
#define R1_CC_ERROR (1u << 20)                  /* erx, c */
#define R1_ERROR (1u << 19)                     /* erx, c */
#define R1_CSD_OVERWRITE (1u << 16)             /* erx, c */
#define R1_WP_ERASE_SKIP (1u << 15)             /* erx, c */
#define R1_CARD_ECC_DISABLED (1u << 14)         /* sx, a */
#define R1_ERASE_RESET (1u << 13)               /* sr, c */
#define R1_CURRENT_STATE_MASK (0xfu << 9)       /* sx, b */
#define R1_READY_FOR_DATA (1u << 8)             /* sx, a */
#define R1_SWITCH_ERROR (1u << 7)               /* sx, c */
#define R1_APP_CMD (1u << 5)                    /* sr, c */
#define R1_AKE_SEQ_ERROR (1u << 3)              /* er, c */
#define R1_STATUS(x)            ((x) & 0xFFFFE000)
#define R1_CURRENT_STATE(x)     (((x) & R1_CURRENT_STATE_MASK) >> 9)
#define R1_STATE_IDLE   0
#define R1_STATE_READY  1
#define R1_STATE_IDENT  2
#define R1_STATE_STBY   3
#define R1_STATE_TRAN   4
#define R1_STATE_DATA   5
#define R1_STATE_RCV    6
#define R1_STATE_PRG    7
#define R1_STATE_DIS    8

struct mmc_data {
        size_t len;             /* size of the data */
        size_t xfer_len;
        void *data;             /* data buffer */
        uint32_t        flags;
#define MMC_DATA_WRITE  (1UL << 0)
#define MMC_DATA_READ   (1UL << 1)
#define MMC_DATA_STREAM (1UL << 2)
#define MMC_DATA_MULTI  (1UL << 3)
        struct mmc_request *mrq;
};

struct mmc_request {
        struct mmc_command *cmd;
        struct mmc_command *stop;
        void (*done)(struct mmc_request *); /* Completion function */
        void *done_data;                /* requestor set data */
        uint32_t flags;
#define MMC_REQ_DONE    1
};

/* Command definitions */

/* Class 0 and 1: Basic commands & read stream commands */
#define MMC_GO_IDLE_STATE       0
#define MMC_SEND_OP_COND        1
#define MMC_ALL_SEND_CID        2
#define MMC_SET_RELATIVE_ADDR   3
#define SD_SEND_RELATIVE_ADDR   3
#define MMC_SET_DSR             4
#define MMC_SLEEP_AWAKE         5
#define MMC_SWITCH_FUNC         6
#define  MMC_SWITCH_FUNC_CMDS    0
#define  MMC_SWITCH_FUNC_SET     1
#define  MMC_SWITCH_FUNC_CLR     2
#define  MMC_SWITCH_FUNC_WR      3
#define MMC_SELECT_CARD         7
#define MMC_DESELECT_CARD       7
#define MMC_SEND_EXT_CSD        8
#define SD_SEND_IF_COND         8
#define MMC_SEND_CSD            9
#define MMC_SEND_CID            10
#define MMC_READ_DAT_UNTIL_STOP 11
#define MMC_STOP_TRANSMISSION   12
#define MMC_SEND_STATUS         13
#define MMC_BUSTEST_R           14
#define MMC_GO_INACTIVE_STATE   15
#define MMC_BUSTEST_W           19

/* Class 2: Block oriented read commands */
#define MMC_SET_BLOCKLEN        16
#define MMC_READ_SINGLE_BLOCK   17
#define MMC_READ_MULTIPLE_BLOCK 18
#define MMC_SEND_TUNING_BLOCK   19
#define MMC_SEND_TUNING_BLOCK_HS200 21

/* Class 3: Stream write commands */
#define MMC_WRITE_DAT_UNTIL_STOP 20
                        /* reserved: 22 */

/* Class 4: Block oriented write commands */
#define MMC_SET_BLOCK_COUNT     23
#define MMC_WRITE_BLOCK         24
#define MMC_WRITE_MULTIPLE_BLOCK 25
#define MMC_PROGARM_CID         26
#define MMC_PROGRAM_CSD         27

/* Class 6: Block oriented write protection commands */
#define MMC_SET_WRITE_PROT      28
#define MMC_CLR_WRITE_PROT      29
#define MMC_SEND_WRITE_PROT     30
                        /* reserved: 31 */

/* Class 5: Erase commands */
#define SD_ERASE_WR_BLK_START   32
#define SD_ERASE_WR_BLK_END     33
                        /* 34 -- reserved old command */
#define MMC_ERASE_GROUP_START   35
#define MMC_ERASE_GROUP_END     36
                        /* 37 -- reserved old command */
#define MMC_ERASE               38

/* Class 9: I/O mode commands */
#define MMC_FAST_IO             39
#define MMC_GO_IRQ_STATE        40
                        /* reserved: 41 */

/* Class 7: Lock card */
#define MMC_LOCK_UNLOCK         42
                        /* reserved: 43 */
                        /* reserved: 44 */
                        /* reserved: 45 */
                        /* reserved: 46 */
                        /* reserved: 47 */
                        /* reserved: 48 */
                        /* reserved: 49 */
                        /* reserved: 50 */
                        /* reserved: 51 */
                        /* reserved: 54 */

/* Class 8: Application specific commands */
#define MMC_APP_CMD             55
#define MMC_GEN_CMD             56
                        /* reserved: 57 */
                        /* reserved: 58 */
                        /* reserved: 59 */
                        /* reserved for mfg: 60 */
                        /* reserved for mfg: 61 */
                        /* reserved for mfg: 62 */
                        /* reserved for mfg: 63 */

/* Class 9: I/O cards (sd) */
#define SD_IO_RW_DIRECT         52
#define SD_IO_RW_EXTENDED       53

/* Class 10: Switch function commands */
#define SD_SWITCH_FUNC          6
                        /* reserved: 34 */
                        /* reserved: 35 */
                        /* reserved: 36 */
                        /* reserved: 37 */
                        /* reserved: 50 */
                        /* reserved: 57 */

/* Application specific commands for SD */
#define ACMD_SET_BUS_WIDTH      6
#define ACMD_SD_STATUS          13
#define ACMD_SEND_NUM_WR_BLOCKS 22
#define ACMD_SET_WR_BLK_ERASE_COUNT 23
#define ACMD_SD_SEND_OP_COND    41
#define ACMD_SET_CLR_CARD_DETECT 42
#define ACMD_SEND_SCR           51

/*
 * EXT_CSD fields
 */
#define EXT_CSD_EXT_PART_ATTR   52      /* R/W, 2 bytes */
#define EXT_CSD_ENH_START_ADDR  136     /* R/W, 4 bytes */
#define EXT_CSD_ENH_SIZE_MULT   140     /* R/W, 3 bytes */
#define EXT_CSD_GP_SIZE_MULT    143     /* R/W, 12 bytes */
#define EXT_CSD_PART_SET        155     /* R/W */
#define EXT_CSD_PART_ATTR       156     /* R/W */
#define EXT_CSD_PART_SUPPORT    160     /* RO */
#define EXT_CSD_RPMB_MULT       168     /* RO */
#define EXT_CSD_BOOT_WP_STATUS  174     /* RO */
#define EXT_CSD_ERASE_GRP_DEF   175     /* R/W */
#define EXT_CSD_PART_CONFIG     179     /* R/W */
#define EXT_CSD_BUS_WIDTH       183     /* R/W */
#define EXT_CSD_STROBE_SUPPORT  184     /* RO */
#define EXT_CSD_HS_TIMING       185     /* R/W */
#define EXT_CSD_POWER_CLASS     187     /* R/W */
#define EXT_CSD_CARD_TYPE       196     /* RO */
#define EXT_CSD_DRIVER_STRENGTH 197     /* RO */
#define EXT_CSD_REV             192     /* RO */
#define EXT_CSD_PART_SWITCH_TO  199     /* RO */
#define EXT_CSD_PWR_CL_52_195   200     /* RO */
#define EXT_CSD_PWR_CL_26_195   201     /* RO */
#define EXT_CSD_PWR_CL_52_360   202     /* RO */
#define EXT_CSD_PWR_CL_26_360   203     /* RO */
#define EXT_CSD_SEC_CNT         212     /* RO, 4 bytes */
#define EXT_CSD_HC_WP_GRP_SIZE  221     /* RO */
#define EXT_CSD_ERASE_TO_MULT   223     /* RO */
#define EXT_CSD_ERASE_GRP_SIZE  224     /* RO */
#define EXT_CSD_BOOT_SIZE_MULT  226     /* RO */
#define EXT_CSD_PWR_CL_200_195  236     /* RO */
#define EXT_CSD_PWR_CL_200_360  237     /* RO */
#define EXT_CSD_PWR_CL_52_195_DDR 238   /* RO */
#define EXT_CSD_PWR_CL_52_360_DDR 239   /* RO */
#define EXT_CSD_GEN_CMD6_TIME   248     /* RO */
#define EXT_CSD_PWR_CL_200_360_DDR 253  /* RO */

/*
 * EXT_CSD field definitions
 */
#define EXT_CSD_EXT_PART_ATTR_DEFAULT           0x0
#define EXT_CSD_EXT_PART_ATTR_SYSTEMCODE        0x1
#define EXT_CSD_EXT_PART_ATTR_NPERSISTENT       0x2

#define EXT_CSD_PART_SET_COMPLETED              0x01

#define EXT_CSD_PART_ATTR_ENH_USR               0x01
#define EXT_CSD_PART_ATTR_ENH_GP0               0x02
#define EXT_CSD_PART_ATTR_ENH_GP1               0x04
#define EXT_CSD_PART_ATTR_ENH_GP2               0x08
#define EXT_CSD_PART_ATTR_ENH_GP3               0x10
#define EXT_CSD_PART_ATTR_ENH_MASK              0x1f

#define EXT_CSD_PART_SUPPORT_EN                 0x01
#define EXT_CSD_PART_SUPPORT_ENH_ATTR_EN        0x02
#define EXT_CSD_PART_SUPPORT_EXT_ATTR_EN        0x04

#define EXT_CSD_BOOT_WP_STATUS_BOOT0_PWR        0x01
#define EXT_CSD_BOOT_WP_STATUS_BOOT0_PERM       0x02
#define EXT_CSD_BOOT_WP_STATUS_BOOT0_MASK       0x03
#define EXT_CSD_BOOT_WP_STATUS_BOOT1_PWR        0x04
#define EXT_CSD_BOOT_WP_STATUS_BOOT1_PERM       0x08
#define EXT_CSD_BOOT_WP_STATUS_BOOT1_MASK       0x0c

#define EXT_CSD_ERASE_GRP_DEF_EN        0x01

#define EXT_CSD_PART_CONFIG_ACC_DEFAULT 0x00
#define EXT_CSD_PART_CONFIG_ACC_BOOT0   0x01
#define EXT_CSD_PART_CONFIG_ACC_BOOT1   0x02
#define EXT_CSD_PART_CONFIG_ACC_RPMB    0x03
#define EXT_CSD_PART_CONFIG_ACC_GP0     0x04
#define EXT_CSD_PART_CONFIG_ACC_GP1     0x05
#define EXT_CSD_PART_CONFIG_ACC_GP2     0x06
#define EXT_CSD_PART_CONFIG_ACC_GP3     0x07
#define EXT_CSD_PART_CONFIG_ACC_MASK    0x07
#define EXT_CSD_PART_CONFIG_BOOT0       0x08
#define EXT_CSD_PART_CONFIG_BOOT1       0x10
#define EXT_CSD_PART_CONFIG_BOOT_USR    0x38
#define EXT_CSD_PART_CONFIG_BOOT_MASK   0x38

#define EXT_CSD_CMD_SET_NORMAL          1
#define EXT_CSD_CMD_SET_SECURE          2
#define EXT_CSD_CMD_SET_CPSECURE        4

#define EXT_CSD_HS_TIMING_BC            0
#define EXT_CSD_HS_TIMING_HS            1
#define EXT_CSD_HS_TIMING_DDR200                2
#define EXT_CSD_HS_TIMING_DDR400                3
#define EXT_CSD_HS_TIMING_DRV_STR_SHIFT 4

#define EXT_CSD_POWER_CLASS_8BIT_MASK   0xf0
#define EXT_CSD_POWER_CLASS_8BIT_SHIFT  4
#define EXT_CSD_POWER_CLASS_4BIT_MASK   0x0f
#define EXT_CSD_POWER_CLASS_4BIT_SHIFT  0

#define EXT_CSD_CARD_TYPE_HS_26         0x0001
#define EXT_CSD_CARD_TYPE_HS_52         0x0002
#define EXT_CSD_CARD_TYPE_DDR_52_1_8V   0x0004
#define EXT_CSD_CARD_TYPE_DDR_52_1_2V   0x0008
#define EXT_CSD_CARD_TYPE_HS200_1_8V    0x0010
#define EXT_CSD_CARD_TYPE_HS200_1_2V    0x0020
#define EXT_CSD_CARD_TYPE_HS400_1_8V    0x0040
#define EXT_CSD_CARD_TYPE_HS400_1_2V    0x0080
#define EXT_CSD_CARD_TYPE_HS400ES       0x0100

#define EXT_CSD_BUS_WIDTH_1     0
#define EXT_CSD_BUS_WIDTH_4     1
#define EXT_CSD_BUS_WIDTH_8     2
#define EXT_CSD_BUS_WIDTH_4_DDR 5
#define EXT_CSD_BUS_WIDTH_8_DDR 6
#define EXT_CSD_BUS_WIDTH_ES    0x80

#define MMC_TYPE_HS_26_MAX              26000000
#define MMC_TYPE_HS_52_MAX              52000000
#define MMC_TYPE_DDR52_MAX              52000000
#define MMC_TYPE_HS200_HS400ES_MAX      200000000

/*
 * SD bus widths
 */
#define SD_BUS_WIDTH_1          0
#define SD_BUS_WIDTH_4          2

/*
 * SD Switch
 */
#define SD_SWITCH_MODE_CHECK    0
#define SD_SWITCH_MODE_SET      1
#define SD_SWITCH_GROUP1        0
#define SD_SWITCH_NORMAL_MODE   0
#define SD_SWITCH_HS_MODE       1
#define SD_SWITCH_SDR50_MODE    2
#define SD_SWITCH_SDR104_MODE   3
#define SD_SWITCH_DDR50         4
#define SD_SWITCH_NOCHANGE      0xF

#define SD_CLR_CARD_DETECT      0
#define SD_SET_CARD_DETECT      1

#define SD_HS_MAX               50000000
#define SD_DDR50_MAX            50000000
#define SD_SDR12_MAX            25000000
#define SD_SDR25_MAX            50000000
#define SD_SDR50_MAX            100000000
#define SD_SDR104_MAX           208000000

/* Specifications require 400 kHz max. during ID phase. */
#define SD_MMC_CARD_ID_FREQUENCY        400000

/* OCR bits */

/*
 * in SD 2.0 spec, bits 8-14 are now marked reserved
 * Low voltage in SD2.0 spec is bit 7, TBD voltage
 * Low voltage in MMC 3.31 spec is bit 7, 1.65-1.95V
 * Specs prior to  MMC 3.31 defined bits 0-7 as voltages down to 1.5V.
 * 3.31 redefined them to be reserved and also said that cards had to
 * support the 2.7-3.6V and fixed the OCR to be 0xfff8000 for high voltage
 * cards.  MMC 4.0 says that a dual voltage card responds with 0xfff8080.
 * Looks like the fine-grained control of the voltage tolerance ranges
 * was abandoned.
 *
 * The MMC_OCR_CCS appears to be valid for only SD cards.
 */
#define MMC_OCR_VOLTAGE 0x3fffffffU     /* Vdd Voltage mask */
#define MMC_OCR_MIN_VOLTAGE_SHIFT       7
#define MMC_OCR_LOW_VOLTAGE (1u << 7)   /* Low Voltage Range -- tbd */
#define MMC_OCR_200_210 (1U << 8)       /* Vdd voltage 2.00 ~ 2.10 */
#define MMC_OCR_210_220 (1U << 9)       /* Vdd voltage 2.10 ~ 2.20 */
#define MMC_OCR_220_230 (1U << 10)      /* Vdd voltage 2.20 ~ 2.30 */
#define MMC_OCR_230_240 (1U << 11)      /* Vdd voltage 2.30 ~ 2.40 */
#define MMC_OCR_240_250 (1U << 12)      /* Vdd voltage 2.40 ~ 2.50 */
#define MMC_OCR_250_260 (1U << 13)      /* Vdd voltage 2.50 ~ 2.60 */
#define MMC_OCR_260_270 (1U << 14)      /* Vdd voltage 2.60 ~ 2.70 */
#define MMC_OCR_270_280 (1U << 15)      /* Vdd voltage 2.70 ~ 2.80 */
#define MMC_OCR_280_290 (1U << 16)      /* Vdd voltage 2.80 ~ 2.90 */
#define MMC_OCR_290_300 (1U << 17)      /* Vdd voltage 2.90 ~ 3.00 */
#define MMC_OCR_300_310 (1U << 18)      /* Vdd voltage 3.00 ~ 3.10 */
#define MMC_OCR_310_320 (1U << 19)      /* Vdd voltage 3.10 ~ 3.20 */
#define MMC_OCR_320_330 (1U << 20)      /* Vdd voltage 3.20 ~ 3.30 */
#define MMC_OCR_330_340 (1U << 21)      /* Vdd voltage 3.30 ~ 3.40 */
#define MMC_OCR_340_350 (1U << 22)      /* Vdd voltage 3.40 ~ 3.50 */
#define MMC_OCR_350_360 (1U << 23)      /* Vdd voltage 3.50 ~ 3.60 */
#define MMC_OCR_MAX_VOLTAGE_SHIFT       23
#define MMC_OCR_S18R    (1U << 24)      /* Switching to 1.8 V requested (SD) */
#define MMC_OCR_S18A    MMC_OCR_S18R    /* Switching to 1.8 V accepted (SD) */
#define MMC_OCR_XPC     (1U << 28)      /* SDXC Power Control */
#define MMC_OCR_ACCESS_MODE_BYTE (0U << 29) /* Access Mode Byte (MMC) */
#define MMC_OCR_ACCESS_MODE_SECT (1U << 29) /* Access Mode Sector (MMC) */
#define MMC_OCR_ACCESS_MODE_MASK (3U << 29)
#define MMC_OCR_CCS     (1u << 30)      /* Card Capacity status (SD vs SDHC) */
#define MMC_OCR_CARD_BUSY (1U << 31)    /* Card Power up status */

/* CSD -- decoded structure */
struct mmc_cid {
        uint32_t mid;
        char pnm[8];
        uint32_t psn;
        uint16_t oid;
        uint16_t mdt_year;
        uint8_t mdt_month;
        uint8_t prv;
        uint8_t fwrev;
};

struct mmc_csd
{
        uint8_t csd_structure;
        uint8_t spec_vers;
        uint16_t ccc;
        uint16_t tacc;
        uint32_t nsac;
        uint32_t r2w_factor;
        uint32_t tran_speed;
        uint32_t read_bl_len;
        uint32_t write_bl_len;
        uint32_t vdd_r_curr_min;
        uint32_t vdd_r_curr_max;
        uint32_t vdd_w_curr_min;
        uint32_t vdd_w_curr_max;
        uint32_t wp_grp_size;
        uint32_t erase_sector;
        uint64_t capacity;
        unsigned int read_bl_partial:1,
            read_blk_misalign:1,
            write_bl_partial:1,
            write_blk_misalign:1,
            dsr_imp:1,
            erase_blk_en:1,
            wp_grp_enable:1;
};

struct mmc_scr
{
        unsigned char           sda_vsn;
        unsigned char           bus_widths;
#define SD_SCR_BUS_WIDTH_1      (1<<0)
#define SD_SCR_BUS_WIDTH_4      (1<<2)
};

struct mmc_sd_status
{
        uint8_t                 bus_width;
        uint8_t                 secured_mode;
        uint16_t                card_type;
        uint16_t                prot_area;
        uint8_t                 speed_class;
        uint8_t                 perf_move;
        uint8_t                 au_size;
        uint16_t                erase_size;
        uint8_t                 erase_timeout;
        uint8_t                 erase_offset;
};

/*
 * Various MMC/SD constants
 */
#define MMC_BOOT_RPMB_BLOCK_SIZE        (128 * 1024)

#define MMC_EXTCSD_SIZE 512

#define MMC_PART_GP_MAX 4
#define MMC_PART_MAX    8

/*
 * Older versions of the MMC standard had a variable sector size.  However,
 * I've been able to find no old MMC or SD cards that have a non 512
 * byte sector size anywhere, so we assume that such cards are very rare
 * and only note their existance in passing here...
 */
#define MMC_SECTOR_SIZE 512

#endif /* BUS_MMCREG_H */