/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright (C) 2005, Intec Automation Inc.
 * Copyright (C) 2014, Freescale Semiconductor, Inc.
 */

#ifndef __LINUX_MTD_SPI_NOR_INTERNAL_H
#define __LINUX_MTD_SPI_NOR_INTERNAL_H

#include "sfdp.h"

#define SPI_NOR_MAX_ID_LEN      6
/*
 * 256 bytes is a sane default for most older flashes. Newer flashes will
 * have the page size defined within their SFDP tables.
 */
#define SPI_NOR_DEFAULT_PAGE_SIZE 256
#define SPI_NOR_DEFAULT_N_BANKS 1
#define SPI_NOR_DEFAULT_SECTOR_SIZE SZ_64K

/* Standard SPI NOR flash operations. */
#define SPI_NOR_READID_OP(naddr, ndummy, buf, len)                      \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_RDID, 0),                   \
                   SPI_MEM_OP_ADDR(naddr, 0, 0),                        \
                   SPI_MEM_OP_DUMMY(ndummy, 0),                         \
                   SPI_MEM_OP_DATA_IN(len, buf, 0))

#define SPI_NOR_WREN_OP                                                 \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WREN, 0),                   \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_DATA)

#define SPI_NOR_WRDI_OP                                                 \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRDI, 0),                   \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_DATA)

#define SPI_NOR_RDSR_OP(buf)                                            \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_RDSR, 0),                   \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_IN(1, buf, 0))

#define SPI_NOR_WRSR_OP(buf, len)                                       \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR, 0),                   \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_OUT(len, buf, 0))

#define SPI_NOR_RDSR2_OP(buf)                                           \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_RDSR2, 0),                  \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_OUT(1, buf, 0))

#define SPI_NOR_WRSR2_OP(buf)                                           \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR2, 0),                  \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_OUT(1, buf, 0))

#define SPI_NOR_RDCR_OP(buf)                                            \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_RDCR, 0),                   \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_IN(1, buf, 0))

#define SPI_NOR_EN4B_EX4B_OP(enable)                                    \
        SPI_MEM_OP(SPI_MEM_OP_CMD(enable ? SPINOR_OP_EN4B : SPINOR_OP_EX4B, 0), \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_DATA)

#define SPI_NOR_BRWR_OP(buf)                                            \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_BRWR, 0),                   \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_OUT(1, buf, 0))

#define SPI_NOR_GBULK_OP                                                \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_GBULK, 0),                  \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_DATA)

#define SPI_NOR_DIE_ERASE_OP(opcode, addr_nbytes, addr, dice)           \
        SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 0),                           \
                   SPI_MEM_OP_ADDR(dice ? addr_nbytes : 0, addr, 0),    \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_DATA)

#define SPI_NOR_SECTOR_ERASE_OP(opcode, addr_nbytes, addr)              \
        SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 0),                           \
                   SPI_MEM_OP_ADDR(addr_nbytes, addr, 0),               \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_DATA)

#define SPI_NOR_READ_OP(opcode)                                         \
        SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 0),                           \
                   SPI_MEM_OP_ADDR(3, 0, 0),                            \
                   SPI_MEM_OP_DUMMY(1, 0),                              \
                   SPI_MEM_OP_DATA_IN(2, NULL, 0))

#define SPI_NOR_PP_OP(opcode)                                           \
        SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 0),                           \
                   SPI_MEM_OP_ADDR(3, 0, 0),                            \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_DATA_OUT(2, NULL, 0))

#define SPINOR_SRSTEN_OP                                                \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_SRSTEN, 0),                 \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DATA)

#define SPINOR_SRST_OP                                                  \
        SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_SRST, 0),                   \
                   SPI_MEM_OP_NO_DUMMY,                                 \
                   SPI_MEM_OP_NO_ADDR,                                  \
                   SPI_MEM_OP_NO_DATA)

/* Keep these in sync with the list in debugfs.c */
enum spi_nor_option_flags {
        SNOR_F_HAS_SR_TB        = BIT(0),
        SNOR_F_NO_OP_CHIP_ERASE = BIT(1),
        SNOR_F_BROKEN_RESET     = BIT(2),
        SNOR_F_4B_OPCODES       = BIT(3),
        SNOR_F_HAS_4BAIT        = BIT(4),
        SNOR_F_HAS_LOCK         = BIT(5),
        SNOR_F_HAS_16BIT_SR     = BIT(6),
        SNOR_F_NO_READ_CR       = BIT(7),
        SNOR_F_HAS_SR_TB_BIT6   = BIT(8),
        SNOR_F_HAS_4BIT_BP      = BIT(9),
        SNOR_F_HAS_SR_BP3_BIT6  = BIT(10),
        SNOR_F_IO_MODE_EN_VOLATILE = BIT(11),
        SNOR_F_SOFT_RESET       = BIT(12),
        SNOR_F_SWP_IS_VOLATILE  = BIT(13),
        SNOR_F_RWW              = BIT(14),
        SNOR_F_ECC              = BIT(15),
        SNOR_F_NO_WP            = BIT(16),
        SNOR_F_SWAP16           = BIT(17),
        SNOR_F_HAS_SR2_CMP_BIT6 = BIT(18),
};

struct spi_nor_read_command {
        u8                      num_mode_clocks;
        u8                      num_wait_states;
        u8                      opcode;
        enum spi_nor_protocol   proto;
};

struct spi_nor_pp_command {
        u8                      opcode;
        enum spi_nor_protocol   proto;
};

enum spi_nor_read_command_index {
        SNOR_CMD_READ,
        SNOR_CMD_READ_FAST,
        SNOR_CMD_READ_1_1_1_DTR,

        /* Dual SPI */
        SNOR_CMD_READ_1_1_2,
        SNOR_CMD_READ_1_2_2,
        SNOR_CMD_READ_2_2_2,
        SNOR_CMD_READ_1_2_2_DTR,

        /* Quad SPI */
        SNOR_CMD_READ_1_1_4,
        SNOR_CMD_READ_1_4_4,
        SNOR_CMD_READ_4_4_4,
        SNOR_CMD_READ_1_4_4_DTR,

        /* Octal SPI */
        SNOR_CMD_READ_1_1_8,
        SNOR_CMD_READ_1_8_8,
        SNOR_CMD_READ_8_8_8,
        SNOR_CMD_READ_1_8_8_DTR,
        SNOR_CMD_READ_8_8_8_DTR,

        SNOR_CMD_READ_MAX
};

enum spi_nor_pp_command_index {
        SNOR_CMD_PP,

        /* Quad SPI */
        SNOR_CMD_PP_1_1_4,
        SNOR_CMD_PP_1_4_4,
        SNOR_CMD_PP_4_4_4,

        /* Octal SPI */
        SNOR_CMD_PP_1_1_8,
        SNOR_CMD_PP_1_8_8,
        SNOR_CMD_PP_8_8_8,
        SNOR_CMD_PP_8_8_8_DTR,

        SNOR_CMD_PP_MAX
};

/**
 * struct spi_nor_erase_type - Structure to describe a SPI NOR erase type
 * @size:               the size of the sector/block erased by the erase type.
 *                      JEDEC JESD216B imposes erase sizes to be a power of 2.
 * @size_shift:         @size is a power of 2, the shift is stored in
 *                      @size_shift.
 * @size_mask:          the size mask based on @size_shift.
 * @opcode:             the SPI command op code to erase the sector/block.
 * @idx:                Erase Type index as sorted in the Basic Flash Parameter
 *                      Table. It will be used to synchronize the supported
 *                      Erase Types with the ones identified in the SFDP
 *                      optional tables.
 */
struct spi_nor_erase_type {
        u32     size;
        u32     size_shift;
        u32     size_mask;
        u8      opcode;
        u8      idx;
};

/**
 * struct spi_nor_erase_command - Used for non-uniform erases
 * The structure is used to describe a list of erase commands to be executed
 * once we validate that the erase can be performed. The elements in the list
 * are run-length encoded.
 * @list:               for inclusion into the list of erase commands.
 * @count:              how many times the same erase command should be
 *                      consecutively used.
 * @size:               the size of the sector/block erased by the command.
 * @opcode:             the SPI command op code to erase the sector/block.
 */
struct spi_nor_erase_command {
        struct list_head        list;
        u32                     count;
        u32                     size;
        u8                      opcode;
};

/**
 * struct spi_nor_erase_region - Structure to describe a SPI NOR erase region
 * @offset:             the offset in the data array of erase region start.
 * @size:               the size of the region in bytes.
 * @erase_mask:         bitmask to indicate all the supported erase commands
 *                      inside this region. The erase types are sorted in
 *                      ascending order with the smallest Erase Type size being
 *                      at BIT(0).
 * @overlaid:           determine if this region is overlaid.
 */
struct spi_nor_erase_region {
        u64             offset;
        u64             size;
        u8              erase_mask;
        bool            overlaid;
};

#define SNOR_ERASE_TYPE_MAX     4

/**
 * struct spi_nor_erase_map - Structure to describe the SPI NOR erase map
 * @regions:            array of erase regions. The regions are consecutive in
 *                      address space. Walking through the regions is done
 *                      incrementally.
 * @uniform_region:     a pre-allocated erase region for SPI NOR with a uniform
 *                      sector size (legacy implementation).
 * @erase_type:         an array of erase types shared by all the regions.
 *                      The erase types are sorted in ascending order, with the
 *                      smallest Erase Type size being the first member in the
 *                      erase_type array.
 * @n_regions:          number of erase regions.
 */
struct spi_nor_erase_map {
        struct spi_nor_erase_region     *regions;
        struct spi_nor_erase_region     uniform_region;
        struct spi_nor_erase_type       erase_type[SNOR_ERASE_TYPE_MAX];
        unsigned int                    n_regions;
};

/**
 * struct spi_nor_locking_ops - SPI NOR locking methods
 * @lock:       lock a region of the SPI NOR, never locks more than what is
 *              requested, ie. may lock less.
 * @unlock:     unlock a region of the SPI NOR, may unlock more than what is
 *              requested.
 * @is_locked:  check if a region of the SPI NOR is completely locked, returns
 *              false otherwise. This feedback may be misleading because users
 *              may get an "unlocked" status even though a subpart of the region
 *              is effectively locked.
 *
 * If in doubt during development, check-out the debugfs output which tries to
 * be more user friendly.
 */
struct spi_nor_locking_ops {
        int (*lock)(struct spi_nor *nor, loff_t ofs, u64 len);
        int (*unlock)(struct spi_nor *nor, loff_t ofs, u64 len);
        int (*is_locked)(struct spi_nor *nor, loff_t ofs, u64 len);
};

/**
 * struct spi_nor_otp_organization - Structure to describe the SPI NOR OTP regions
 * @len:        size of one OTP region in bytes.
 * @base:       start address of the OTP area.
 * @offset:     offset between consecutive OTP regions if there are more
 *              than one.
 * @n_regions:  number of individual OTP regions.
 */
struct spi_nor_otp_organization {
        size_t len;
        loff_t base;
        loff_t offset;
        unsigned int n_regions;
};

/**
 * struct spi_nor_otp_ops - SPI NOR OTP methods
 * @read:       read from the SPI NOR OTP area.
 * @write:      write to the SPI NOR OTP area.
 * @lock:       lock an OTP region.
 * @erase:      erase an OTP region.
 * @is_locked:  check if an OTP region of the SPI NOR is locked.
 */
struct spi_nor_otp_ops {
        int (*read)(struct spi_nor *nor, loff_t addr, size_t len, u8 *buf);
        int (*write)(struct spi_nor *nor, loff_t addr, size_t len,
                     const u8 *buf);
        int (*lock)(struct spi_nor *nor, unsigned int region);
        int (*erase)(struct spi_nor *nor, loff_t addr);
        int (*is_locked)(struct spi_nor *nor, unsigned int region);
};

/**
 * struct spi_nor_otp - SPI NOR OTP grouping structure
 * @org:        OTP region organization
 * @ops:        OTP access ops
 */
struct spi_nor_otp {
        const struct spi_nor_otp_organization *org;
        const struct spi_nor_otp_ops *ops;
};

/**
 * struct spi_nor_flash_parameter - SPI NOR flash parameters and settings.
 * Includes legacy flash parameters and settings that can be overwritten
 * by the spi_nor_fixups hooks, or dynamically when parsing the JESD216
 * Serial Flash Discoverable Parameters (SFDP) tables.
 *
 * @bank_size:          the flash memory bank density in bytes.
 * @size:               the total flash memory density in bytes.
 * @writesize           Minimal writable flash unit size. Defaults to 1. Set to
 *                      ECC unit size for ECC-ed flashes.
 * @page_size:          the page size of the SPI NOR flash memory.
 * @addr_nbytes:        number of address bytes to send.
 * @addr_mode_nbytes:   number of address bytes of current address mode. Useful
 *                      when the flash operates with 4B opcodes but needs the
 *                      internal address mode for opcodes that don't have a 4B
 *                      opcode correspondent.
 * @rdsr_dummy:         dummy cycles needed for Read Status Register command
 *                      in octal DTR mode.
 * @rdsr_addr_nbytes:   dummy address bytes needed for Read Status Register
 *                      command in octal DTR mode.
 * @n_banks:            number of banks.
 * @n_dice:             number of dice in the flash memory.
 * @die_erase_opcode:   die erase opcode. Defaults to SPINOR_OP_CHIP_ERASE.
 * @vreg_offset:        volatile register offset for each die.
 * @hwcaps:             describes the read and page program hardware
 *                      capabilities.
 * @reads:              read capabilities ordered by priority: the higher index
 *                      in the array, the higher priority.
 * @page_programs:      page program capabilities ordered by priority: the
 *                      higher index in the array, the higher priority.
 * @erase_map:          the erase map parsed from the SFDP Sector Map Parameter
 *                      Table.
 * @otp:                SPI NOR OTP info.
 * @set_octal_dtr:      enables or disables SPI NOR octal DTR mode.
 * @quad_enable:        enables SPI NOR quad mode.
 * @set_4byte_addr_mode: puts the SPI NOR in 4 byte addressing mode.
 * @ready:              (optional) flashes might use a different mechanism
 *                      than reading the status register to indicate they
 *                      are ready for a new command
 * @locking_ops:        SPI NOR locking methods.
 * @priv:               flash's private data.
 */
struct spi_nor_flash_parameter {
        u64                             bank_size;
        u64                             size;
        u32                             writesize;
        u32                             page_size;
        u8                              addr_nbytes;
        u8                              addr_mode_nbytes;
        u8                              rdsr_dummy;
        u8                              rdsr_addr_nbytes;
        u8                              n_banks;
        u8                              n_dice;
        u8                              die_erase_opcode;
        u32                             *vreg_offset;

        struct spi_nor_hwcaps           hwcaps;
        struct spi_nor_read_command     reads[SNOR_CMD_READ_MAX];
        struct spi_nor_pp_command       page_programs[SNOR_CMD_PP_MAX];

        struct spi_nor_erase_map        erase_map;
        struct spi_nor_otp              otp;

        int (*set_octal_dtr)(struct spi_nor *nor, bool enable);
        int (*quad_enable)(struct spi_nor *nor);
        int (*set_4byte_addr_mode)(struct spi_nor *nor, bool enable);
        int (*ready)(struct spi_nor *nor);

        const struct spi_nor_locking_ops *locking_ops;
        void *priv;
};

/**
 * struct spi_nor_fixups - SPI NOR fixup hooks
 * @default_init: called after default flash parameters init. Used to tweak
 *                flash parameters when information provided by the flash_info
 *                table is incomplete or wrong.
 * @post_bfpt: called after the BFPT table has been parsed
 * @smpt_read_dummy: called during SMPT table is being parsed. Used to fix the
 *                   number of dummy cycles in read register ops.
 * @smpt_map_id: called after map ID in SMPT table has been determined for the
 *               case the map ID is wrong and needs to be fixed.
 * @post_sfdp: called after SFDP has been parsed (is not called for SPI NORs
 *             that do not support RDSFDP). Typically used to tweak various
 *             parameters that could not be extracted by other means (i.e.
 *             when information provided by the SFDP/flash_info tables are
 *             incomplete or wrong).
 * @late_init: used to initialize flash parameters that are not declared in the
 *             JESD216 SFDP standard, or where SFDP tables not defined at all.
 *             Will replace the default_init() hook.
 *
 * Those hooks can be used to tweak the SPI NOR configuration when the SFDP
 * table is broken or not available.
 */
struct spi_nor_fixups {
        void (*default_init)(struct spi_nor *nor);
        int (*post_bfpt)(struct spi_nor *nor,
                         const struct sfdp_parameter_header *bfpt_header,
                         const struct sfdp_bfpt *bfpt);
        void (*smpt_read_dummy)(const struct spi_nor *nor, u8 *read_dummy);
        void (*smpt_map_id)(const struct spi_nor *nor, u8 *map_id);
        int (*post_sfdp)(struct spi_nor *nor);
        int (*late_init)(struct spi_nor *nor);
};

/**
 * struct spi_nor_id - SPI NOR flash ID.
 *
 * @bytes: the bytes returned by the flash when issuing command 9F. Typically,
 *         the first byte is the manufacturer ID code (see JEP106) and the next
 *         two bytes are a flash part specific ID.
 * @len:   the number of bytes of ID.
 */
struct spi_nor_id {
        const u8 *bytes;
        u8 len;
};

/**
 * struct flash_info - SPI NOR flash_info entry.
 * @id:   pointer to struct spi_nor_id or NULL, which means "no ID" (mostly
 *        older chips).
 * @name: (obsolete) the name of the flash. Do not set it for new additions.
 * @size:           the size of the flash in bytes. The flash size is one
 *                  property parsed by the SFDP. We use it as an indicator
 *                  whether we need SFDP parsing for a particular flash.
 *                  I.e. non-legacy flash entries in flash_info will have
 *                  a size of zero iff SFDP should be used.
 * @sector_size:    (optional) the size listed here is what works with
 *                  SPINOR_OP_SE, which isn't necessarily called a "sector" by
 *                  the vendor. Defaults to 64k.
 * @n_banks:        (optional) the number of banks. Defaults to 1.
 * @page_size:      (optional) the flash's page size. Defaults to 256.
 * @addr_nbytes:    number of address bytes to send.
 *
 * @flags:          flags that indicate support that is not defined by the
 *                  JESD216 standard in its SFDP tables. Flag meanings:
 *   SPI_NOR_HAS_LOCK:        flash supports lock/unlock via SR
 *   SPI_NOR_HAS_TB:          flash SR has Top/Bottom (TB) protect bit. Must be
 *                            used with SPI_NOR_HAS_LOCK.
 *   SPI_NOR_TB_SR_BIT6:      Top/Bottom (TB) is bit 6 of status register.
 *                            Must be used with SPI_NOR_HAS_TB.
 *   SPI_NOR_4BIT_BP:         flash SR has 4 bit fields (BP0-3) for block
 *                            protection.
 *   SPI_NOR_BP3_SR_BIT6:     BP3 is bit 6 of status register. Must be used with
 *                            SPI_NOR_4BIT_BP.
 *   SPI_NOR_SWP_IS_VOLATILE: flash has volatile software write protection bits.
 *                            Usually these will power-up in a write-protected
 *                            state.
 *   SPI_NOR_NO_ERASE:        no erase command needed.
 *   SPI_NOR_QUAD_PP:         flash supports Quad Input Page Program.
 *   SPI_NOR_RWW:             flash supports reads while write.
 *   SPI_NOR_HAS_CMP:         flash SR2 has complement (CMP) protect bit. Must
 *                            be used with SPI_NOR_HAS_LOCK.
 *
 * @no_sfdp_flags:  flags that indicate support that can be discovered via SFDP.
 *                  Used when SFDP tables are not defined in the flash. These
 *                  flags are used together with the SPI_NOR_SKIP_SFDP flag.
 *   SPI_NOR_SKIP_SFDP:       skip parsing of SFDP tables.
 *   SECT_4K:                 SPINOR_OP_BE_4K works uniformly.
 *   SPI_NOR_DUAL_READ:       flash supports Dual Read.
 *   SPI_NOR_QUAD_READ:       flash supports Quad Read.
 *   SPI_NOR_OCTAL_READ:      flash supports Octal Read.
 *   SPI_NOR_OCTAL_DTR_READ:  flash supports octal DTR Read.
 *   SPI_NOR_OCTAL_DTR_PP:    flash supports Octal DTR Page Program.
 *
 * @fixup_flags:    flags that indicate support that can be discovered via SFDP
 *                  ideally, but can not be discovered for this particular flash
 *                  because the SFDP table that indicates this support is not
 *                  defined by the flash. In case the table for this support is
 *                  defined but has wrong values, one should instead use a
 *                  post_sfdp() hook to set the SNOR_F equivalent flag.
 *
 *   SPI_NOR_4B_OPCODES:      use dedicated 4byte address op codes to support
 *                            memory size above 128Mib.
 *   SPI_NOR_IO_MODE_EN_VOLATILE: flash enables the best available I/O mode
 *                            via a volatile bit.
 * @mfr_flags:      manufacturer private flags. Used in the manufacturer fixup
 *                  hooks to differentiate support between flashes of the same
 *                  manufacturer.
 * @otp_org:        flash's OTP organization.
 * @fixups:         part specific fixup hooks.
 */
struct flash_info {
        char *name;
        const struct spi_nor_id *id;
        size_t size;
        unsigned sector_size;
        u16 page_size;
        u8 n_banks;
        u8 addr_nbytes;

        u16 flags;
#define SPI_NOR_HAS_LOCK                BIT(0)
#define SPI_NOR_HAS_TB                  BIT(1)
#define SPI_NOR_TB_SR_BIT6              BIT(2)
#define SPI_NOR_4BIT_BP                 BIT(3)
#define SPI_NOR_BP3_SR_BIT6             BIT(4)
#define SPI_NOR_SWP_IS_VOLATILE         BIT(5)
#define SPI_NOR_NO_ERASE                BIT(6)
#define SPI_NOR_QUAD_PP                 BIT(8)
#define SPI_NOR_RWW                     BIT(9)
#define SPI_NOR_HAS_CMP                 BIT(10)

        u8 no_sfdp_flags;
#define SPI_NOR_SKIP_SFDP               BIT(0)
#define SECT_4K                         BIT(1)
#define SPI_NOR_DUAL_READ               BIT(3)
#define SPI_NOR_QUAD_READ               BIT(4)
#define SPI_NOR_OCTAL_READ              BIT(5)
#define SPI_NOR_OCTAL_DTR_READ          BIT(6)
#define SPI_NOR_OCTAL_DTR_PP            BIT(7)

        u8 fixup_flags;
#define SPI_NOR_4B_OPCODES              BIT(0)
#define SPI_NOR_IO_MODE_EN_VOLATILE     BIT(1)

        u8 mfr_flags;

        const struct spi_nor_otp_organization *otp;
        const struct spi_nor_fixups *fixups;
};

#define SNOR_ID(...)                                                    \
        (&(const struct spi_nor_id){                                    \
                .bytes = (const u8[]){ __VA_ARGS__ },                   \
                .len = sizeof((u8[]){ __VA_ARGS__ }),                   \
        })

#define SNOR_OTP(_len, _n_regions, _base, _offset)                      \
        (&(const struct spi_nor_otp_organization){                      \
                .len = (_len),                                          \
                .base = (_base),                                        \
                .offset = (_offset),                                    \
                .n_regions = (_n_regions),                              \
        })

/**
 * struct spi_nor_manufacturer - SPI NOR manufacturer object
 * @name: manufacturer name
 * @parts: array of parts supported by this manufacturer
 * @nparts: number of entries in the parts array
 * @fixups: hooks called at various points in time during spi_nor_scan()
 */
struct spi_nor_manufacturer {
        const char *name;
        const struct flash_info *parts;
        unsigned int nparts;
        const struct spi_nor_fixups *fixups;
};

/**
 * struct sfdp - SFDP data
 * @num_dwords: number of entries in the dwords array
 * @dwords: array of double words of the SFDP data
 */
struct sfdp {
        size_t  num_dwords;
        u32     *dwords;
};

/* Manufacturer drivers. */
extern const struct spi_nor_manufacturer spi_nor_atmel;
extern const struct spi_nor_manufacturer spi_nor_eon;
extern const struct spi_nor_manufacturer spi_nor_esmt;
extern const struct spi_nor_manufacturer spi_nor_everspin;
extern const struct spi_nor_manufacturer spi_nor_gigadevice;
extern const struct spi_nor_manufacturer spi_nor_intel;
extern const struct spi_nor_manufacturer spi_nor_issi;
extern const struct spi_nor_manufacturer spi_nor_macronix;
extern const struct spi_nor_manufacturer spi_nor_micron;
extern const struct spi_nor_manufacturer spi_nor_st;
extern const struct spi_nor_manufacturer spi_nor_spansion;
extern const struct spi_nor_manufacturer spi_nor_sst;
extern const struct spi_nor_manufacturer spi_nor_winbond;
extern const struct spi_nor_manufacturer spi_nor_xmc;

extern const struct attribute_group *spi_nor_sysfs_groups[];

void spi_nor_spimem_setup_op(const struct spi_nor *nor,
                             struct spi_mem_op *op,
                             const enum spi_nor_protocol proto);
int spi_nor_write_enable(struct spi_nor *nor);
int spi_nor_write_disable(struct spi_nor *nor);
int spi_nor_set_4byte_addr_mode_en4b_ex4b(struct spi_nor *nor, bool enable);
int spi_nor_set_4byte_addr_mode_wren_en4b_ex4b(struct spi_nor *nor,
                                               bool enable);
int spi_nor_set_4byte_addr_mode_brwr(struct spi_nor *nor, bool enable);
int spi_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable);
int spi_nor_wait_till_ready(struct spi_nor *nor);
int spi_nor_global_block_unlock(struct spi_nor *nor);
int spi_nor_prep_and_lock(struct spi_nor *nor);
void spi_nor_unlock_and_unprep(struct spi_nor *nor);
int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor);
int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor);
int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor);
int spi_nor_read_id(struct spi_nor *nor, u8 naddr, u8 ndummy, u8 *id,
                    enum spi_nor_protocol reg_proto);
int spi_nor_read_sr(struct spi_nor *nor, u8 *sr);
int spi_nor_sr_ready(struct spi_nor *nor);
int spi_nor_read_cr(struct spi_nor *nor, u8 *cr);
int spi_nor_write_sr(struct spi_nor *nor, const u8 *sr, size_t len);
int spi_nor_write_sr_and_check(struct spi_nor *nor, u8 sr1);
int spi_nor_write_16bit_cr_and_check(struct spi_nor *nor, u8 cr);
int spi_nor_write_sr_cr_and_check(struct spi_nor *nor, const u8 *regs);

ssize_t spi_nor_read_data(struct spi_nor *nor, loff_t from, size_t len,
                          u8 *buf);
ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
                           const u8 *buf);
int spi_nor_read_any_reg(struct spi_nor *nor, struct spi_mem_op *op,
                         enum spi_nor_protocol proto);
int spi_nor_write_any_volatile_reg(struct spi_nor *nor, struct spi_mem_op *op,
                                   enum spi_nor_protocol proto);
int spi_nor_erase_sector(struct spi_nor *nor, u32 addr);

int spi_nor_otp_read_secr(struct spi_nor *nor, loff_t addr, size_t len, u8 *buf);
int spi_nor_otp_write_secr(struct spi_nor *nor, loff_t addr, size_t len,
                           const u8 *buf);
int spi_nor_otp_erase_secr(struct spi_nor *nor, loff_t addr);
int spi_nor_otp_lock_sr2(struct spi_nor *nor, unsigned int region);
int spi_nor_otp_is_locked_sr2(struct spi_nor *nor, unsigned int region);

int spi_nor_hwcaps_read2cmd(u32 hwcaps);
int spi_nor_hwcaps_pp2cmd(u32 hwcaps);
u8 spi_nor_convert_3to4_read(u8 opcode);
void spi_nor_set_read_settings(struct spi_nor_read_command *read,
                               u8 num_mode_clocks,
                               u8 num_wait_states,
                               u8 opcode,
                               enum spi_nor_protocol proto);
void spi_nor_set_pp_settings(struct spi_nor_pp_command *pp, u8 opcode,
                             enum spi_nor_protocol proto);

void spi_nor_set_erase_type(struct spi_nor_erase_type *erase, u32 size,
                            u8 opcode);
void spi_nor_mask_erase_type(struct spi_nor_erase_type *erase);
void spi_nor_init_uniform_erase_map(struct spi_nor_erase_map *map,
                                    u8 erase_mask, u64 flash_size);

int spi_nor_post_bfpt_fixups(struct spi_nor *nor,
                             const struct sfdp_parameter_header *bfpt_header,
                             const struct sfdp_bfpt *bfpt);

void spi_nor_init_default_locking_ops(struct spi_nor *nor);
bool spi_nor_has_default_locking_ops(struct spi_nor *nor);
void spi_nor_try_unlock_all(struct spi_nor *nor);
void spi_nor_cache_sr_lock_bits(struct spi_nor *nor, u8 *sr);
void spi_nor_set_mtd_locking_ops(struct spi_nor *nor);
void spi_nor_set_mtd_otp_ops(struct spi_nor *nor);

int spi_nor_controller_ops_read_reg(struct spi_nor *nor, u8 opcode,
                                    u8 *buf, size_t len);
int spi_nor_controller_ops_write_reg(struct spi_nor *nor, u8 opcode,
                                     const u8 *buf, size_t len);

int spi_nor_check_sfdp_signature(struct spi_nor *nor);
int spi_nor_parse_sfdp(struct spi_nor *nor);

static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
{
        return container_of(mtd, struct spi_nor, mtd);
}

/**
 * spi_nor_needs_sfdp() - returns true if SFDP parsing is used for this flash.
 *
 * Return: true if SFDP parsing is needed
 */
static inline bool spi_nor_needs_sfdp(const struct spi_nor *nor)
{
        /*
         * The flash size is one property parsed by the SFDP. We use it as an
         * indicator whether we need SFDP parsing for a particular flash. I.e.
         * non-legacy flash entries in flash_info will have a size of zero iff
         * SFDP should be used.
         */
        return !nor->info->size;
}

u64 spi_nor_get_min_prot_length_sr(struct spi_nor *nor);
void spi_nor_get_locked_range_sr(struct spi_nor *nor, const u8 *sr, loff_t *ofs, u64 *len);
bool spi_nor_is_locked_sr(struct spi_nor *nor, loff_t ofs, u64 len, const u8 *sr);

#ifdef CONFIG_DEBUG_FS
void spi_nor_debugfs_register(struct spi_nor *nor);
void spi_nor_debugfs_shutdown(void);
#else
static inline void spi_nor_debugfs_register(struct spi_nor *nor) {}
static inline void spi_nor_debugfs_shutdown(void) {}
#endif

#endif /* __LINUX_MTD_SPI_NOR_INTERNAL_H */