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/* 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
/**
* 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
* @post_sfdp: called after SFDP has been parsed (is also 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).
*
* 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,
struct spi_nor_flash_parameter *params);
void (*post_sfdp)(struct spi_nor *nor);
};
struct flash_info {
char *name;
/*
* This array stores the ID bytes.
* The first three bytes are the JEDIC ID.
* JEDEC ID zero means "no ID" (mostly older chips).
*/
u8 id[SPI_NOR_MAX_ID_LEN];
u8 id_len;
/* The size listed here is what works with SPINOR_OP_SE, which isn't
* necessarily called a "sector" by the vendor.
*/
unsigned sector_size;
u16 n_sectors;
u16 page_size;
u16 addr_width;
u32 flags;
#define SECT_4K BIT(0) /* SPINOR_OP_BE_4K works uniformly */
#define SPI_NOR_NO_ERASE BIT(1) /* No erase command needed */
#define SST_WRITE BIT(2) /* use SST byte programming */
#define SPI_NOR_NO_FR BIT(3) /* Can't do fastread */
#define SECT_4K_PMC BIT(4) /* SPINOR_OP_BE_4K_PMC works uniformly */
#define SPI_NOR_DUAL_READ BIT(5) /* Flash supports Dual Read */
#define SPI_NOR_QUAD_READ BIT(6) /* Flash supports Quad Read */
#define USE_FSR BIT(7) /* use flag status register */
#define SPI_NOR_HAS_LOCK BIT(8) /* Flash supports lock/unlock via SR */
#define SPI_NOR_HAS_TB BIT(9) /*
* Flash SR has Top/Bottom (TB) protect
* bit. Must be used with
* SPI_NOR_HAS_LOCK.
*/
#define SPI_NOR_XSR_RDY BIT(10) /*
* S3AN flashes have specific opcode to
* read the status register.
* Flags SPI_NOR_XSR_RDY and SPI_S3AN
* use the same bit as one implies the
* other, but we will get rid of
* SPI_S3AN soon.
*/
#define SPI_S3AN BIT(10) /*
* Xilinx Spartan 3AN In-System Flash
* (MFR cannot be used for probing
* because it has the same value as
* ATMEL flashes)
*/
#define SPI_NOR_4B_OPCODES BIT(11) /*
* Use dedicated 4byte address op codes
* to support memory size above 128Mib.
*/
#define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */
#define SPI_NOR_SKIP_SFDP BIT(13) /* Skip parsing of SFDP tables */
#define USE_CLSR BIT(14) /* use CLSR command */
#define SPI_NOR_OCTAL_READ BIT(15) /* Flash supports Octal Read */
#define SPI_NOR_TB_SR_BIT6 BIT(16) /*
* Top/Bottom (TB) is bit 6 of
* status register. Must be used with
* SPI_NOR_HAS_TB.
*/
/* Part specific fixup hooks. */
const struct spi_nor_fixups *fixups;
};
/* Used when the "_ext_id" is two bytes at most */
#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
.id = { \
((_jedec_id) >> 16) & 0xff, \
((_jedec_id) >> 8) & 0xff, \
(_jedec_id) & 0xff, \
((_ext_id) >> 8) & 0xff, \
(_ext_id) & 0xff, \
}, \
.id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))), \
.sector_size = (_sector_size), \
.n_sectors = (_n_sectors), \
.page_size = 256, \
.flags = (_flags),
#define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
.id = { \
((_jedec_id) >> 16) & 0xff, \
((_jedec_id) >> 8) & 0xff, \
(_jedec_id) & 0xff, \
((_ext_id) >> 16) & 0xff, \
((_ext_id) >> 8) & 0xff, \
(_ext_id) & 0xff, \
}, \
.id_len = 6, \
.sector_size = (_sector_size), \
.n_sectors = (_n_sectors), \
.page_size = 256, \
.flags = (_flags),
#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width, _flags) \
.sector_size = (_sector_size), \
.n_sectors = (_n_sectors), \
.page_size = (_page_size), \
.addr_width = (_addr_width), \
.flags = (_flags),
#define S3AN_INFO(_jedec_id, _n_sectors, _page_size) \
.id = { \
((_jedec_id) >> 16) & 0xff, \
((_jedec_id) >> 8) & 0xff, \
(_jedec_id) & 0xff \
}, \
.id_len = 3, \
.sector_size = (8*_page_size), \
.n_sectors = (_n_sectors), \
.page_size = _page_size, \
.addr_width = 3, \
.flags = SPI_NOR_NO_FR | SPI_S3AN,
/**
* 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;
};
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(struct spi_nor *nor, bool enable);
int spi_nor_write_ear(struct spi_nor *nor, u8 ear);
int spi_nor_wait_till_ready(struct spi_nor *nor);
int spi_nor_lock_and_prep(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_xread_sr(struct spi_nor *nor, u8 *sr);
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_hwcaps_read2cmd(u32 hwcaps);
u8 spi_nor_convert_3to4_read(u8 opcode);
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);
struct spi_nor_erase_region *
spi_nor_region_next(struct spi_nor_erase_region *region);
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,
struct spi_nor_flash_parameter *params);
static struct spi_nor __maybe_unused *mtd_to_spi_nor(struct mtd_info *mtd)
{
return mtd->priv;
}
#endif /* __LINUX_MTD_SPI_NOR_INTERNAL_H */
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