1034 строки
32 KiB
C
1034 строки
32 KiB
C
/*
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* linux/include/linux/mtd/nand.h
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*
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* Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
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* Steven J. Hill <sjhill@realitydiluted.com>
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* Thomas Gleixner <tglx@linutronix.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Info:
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* Contains standard defines and IDs for NAND flash devices
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*
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* Changelog:
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* See git changelog.
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*/
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#ifndef __LINUX_MTD_NAND_H
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#define __LINUX_MTD_NAND_H
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#include <linux/wait.h>
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#include <linux/spinlock.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/flashchip.h>
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#include <linux/mtd/bbm.h>
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struct mtd_info;
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struct nand_flash_dev;
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struct device_node;
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/* Scan and identify a NAND device */
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extern int nand_scan(struct mtd_info *mtd, int max_chips);
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/*
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* Separate phases of nand_scan(), allowing board driver to intervene
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* and override command or ECC setup according to flash type.
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*/
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extern int nand_scan_ident(struct mtd_info *mtd, int max_chips,
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struct nand_flash_dev *table);
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extern int nand_scan_tail(struct mtd_info *mtd);
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/* Free resources held by the NAND device */
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extern void nand_release(struct mtd_info *mtd);
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/* Internal helper for board drivers which need to override command function */
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extern void nand_wait_ready(struct mtd_info *mtd);
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/* locks all blocks present in the device */
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extern int nand_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
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/* unlocks specified locked blocks */
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extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
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/* The maximum number of NAND chips in an array */
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#define NAND_MAX_CHIPS 8
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/*
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* Constants for hardware specific CLE/ALE/NCE function
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*
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* These are bits which can be or'ed to set/clear multiple
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* bits in one go.
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*/
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/* Select the chip by setting nCE to low */
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#define NAND_NCE 0x01
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/* Select the command latch by setting CLE to high */
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#define NAND_CLE 0x02
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/* Select the address latch by setting ALE to high */
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#define NAND_ALE 0x04
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#define NAND_CTRL_CLE (NAND_NCE | NAND_CLE)
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#define NAND_CTRL_ALE (NAND_NCE | NAND_ALE)
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#define NAND_CTRL_CHANGE 0x80
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/*
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* Standard NAND flash commands
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*/
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#define NAND_CMD_READ0 0
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#define NAND_CMD_READ1 1
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#define NAND_CMD_RNDOUT 5
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#define NAND_CMD_PAGEPROG 0x10
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#define NAND_CMD_READOOB 0x50
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#define NAND_CMD_ERASE1 0x60
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#define NAND_CMD_STATUS 0x70
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#define NAND_CMD_SEQIN 0x80
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#define NAND_CMD_RNDIN 0x85
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#define NAND_CMD_READID 0x90
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#define NAND_CMD_ERASE2 0xd0
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#define NAND_CMD_PARAM 0xec
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#define NAND_CMD_GET_FEATURES 0xee
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#define NAND_CMD_SET_FEATURES 0xef
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#define NAND_CMD_RESET 0xff
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#define NAND_CMD_LOCK 0x2a
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#define NAND_CMD_UNLOCK1 0x23
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#define NAND_CMD_UNLOCK2 0x24
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/* Extended commands for large page devices */
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#define NAND_CMD_READSTART 0x30
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#define NAND_CMD_RNDOUTSTART 0xE0
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#define NAND_CMD_CACHEDPROG 0x15
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#define NAND_CMD_NONE -1
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/* Status bits */
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#define NAND_STATUS_FAIL 0x01
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#define NAND_STATUS_FAIL_N1 0x02
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#define NAND_STATUS_TRUE_READY 0x20
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#define NAND_STATUS_READY 0x40
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#define NAND_STATUS_WP 0x80
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/*
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* Constants for ECC_MODES
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*/
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typedef enum {
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NAND_ECC_NONE,
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NAND_ECC_SOFT,
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NAND_ECC_HW,
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NAND_ECC_HW_SYNDROME,
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NAND_ECC_HW_OOB_FIRST,
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NAND_ECC_SOFT_BCH,
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} nand_ecc_modes_t;
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/*
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* Constants for Hardware ECC
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*/
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/* Reset Hardware ECC for read */
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#define NAND_ECC_READ 0
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/* Reset Hardware ECC for write */
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#define NAND_ECC_WRITE 1
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/* Enable Hardware ECC before syndrome is read back from flash */
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#define NAND_ECC_READSYN 2
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/* Bit mask for flags passed to do_nand_read_ecc */
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#define NAND_GET_DEVICE 0x80
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/*
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* Option constants for bizarre disfunctionality and real
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* features.
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*/
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/* Buswidth is 16 bit */
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#define NAND_BUSWIDTH_16 0x00000002
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/* Chip has cache program function */
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#define NAND_CACHEPRG 0x00000008
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/*
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* Chip requires ready check on read (for auto-incremented sequential read).
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* True only for small page devices; large page devices do not support
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* autoincrement.
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*/
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#define NAND_NEED_READRDY 0x00000100
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/* Chip does not allow subpage writes */
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#define NAND_NO_SUBPAGE_WRITE 0x00000200
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/* Device is one of 'new' xD cards that expose fake nand command set */
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#define NAND_BROKEN_XD 0x00000400
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/* Device behaves just like nand, but is readonly */
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#define NAND_ROM 0x00000800
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/* Device supports subpage reads */
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#define NAND_SUBPAGE_READ 0x00001000
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/* Options valid for Samsung large page devices */
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#define NAND_SAMSUNG_LP_OPTIONS NAND_CACHEPRG
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/* Macros to identify the above */
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#define NAND_HAS_CACHEPROG(chip) ((chip->options & NAND_CACHEPRG))
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#define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
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/* Non chip related options */
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/* This option skips the bbt scan during initialization. */
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#define NAND_SKIP_BBTSCAN 0x00010000
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/*
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* This option is defined if the board driver allocates its own buffers
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* (e.g. because it needs them DMA-coherent).
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*/
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#define NAND_OWN_BUFFERS 0x00020000
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/* Chip may not exist, so silence any errors in scan */
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#define NAND_SCAN_SILENT_NODEV 0x00040000
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/*
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* Autodetect nand buswidth with readid/onfi.
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* This suppose the driver will configure the hardware in 8 bits mode
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* when calling nand_scan_ident, and update its configuration
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* before calling nand_scan_tail.
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*/
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#define NAND_BUSWIDTH_AUTO 0x00080000
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/*
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* This option could be defined by controller drivers to protect against
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* kmap'ed, vmalloc'ed highmem buffers being passed from upper layers
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*/
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#define NAND_USE_BOUNCE_BUFFER 0x00100000
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/* Options set by nand scan */
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/* Nand scan has allocated controller struct */
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#define NAND_CONTROLLER_ALLOC 0x80000000
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/* Cell info constants */
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#define NAND_CI_CHIPNR_MSK 0x03
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#define NAND_CI_CELLTYPE_MSK 0x0C
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#define NAND_CI_CELLTYPE_SHIFT 2
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/* Keep gcc happy */
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struct nand_chip;
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/* ONFI features */
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#define ONFI_FEATURE_16_BIT_BUS (1 << 0)
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#define ONFI_FEATURE_EXT_PARAM_PAGE (1 << 7)
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/* ONFI timing mode, used in both asynchronous and synchronous mode */
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#define ONFI_TIMING_MODE_0 (1 << 0)
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#define ONFI_TIMING_MODE_1 (1 << 1)
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#define ONFI_TIMING_MODE_2 (1 << 2)
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#define ONFI_TIMING_MODE_3 (1 << 3)
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#define ONFI_TIMING_MODE_4 (1 << 4)
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#define ONFI_TIMING_MODE_5 (1 << 5)
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#define ONFI_TIMING_MODE_UNKNOWN (1 << 6)
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/* ONFI feature address */
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#define ONFI_FEATURE_ADDR_TIMING_MODE 0x1
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/* Vendor-specific feature address (Micron) */
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#define ONFI_FEATURE_ADDR_READ_RETRY 0x89
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/* ONFI subfeature parameters length */
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#define ONFI_SUBFEATURE_PARAM_LEN 4
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/* ONFI optional commands SET/GET FEATURES supported? */
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#define ONFI_OPT_CMD_SET_GET_FEATURES (1 << 2)
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struct nand_onfi_params {
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/* rev info and features block */
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/* 'O' 'N' 'F' 'I' */
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u8 sig[4];
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__le16 revision;
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__le16 features;
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__le16 opt_cmd;
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u8 reserved0[2];
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__le16 ext_param_page_length; /* since ONFI 2.1 */
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u8 num_of_param_pages; /* since ONFI 2.1 */
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u8 reserved1[17];
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/* manufacturer information block */
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char manufacturer[12];
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char model[20];
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u8 jedec_id;
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__le16 date_code;
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u8 reserved2[13];
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/* memory organization block */
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__le32 byte_per_page;
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__le16 spare_bytes_per_page;
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__le32 data_bytes_per_ppage;
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__le16 spare_bytes_per_ppage;
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__le32 pages_per_block;
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__le32 blocks_per_lun;
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u8 lun_count;
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u8 addr_cycles;
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u8 bits_per_cell;
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__le16 bb_per_lun;
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__le16 block_endurance;
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u8 guaranteed_good_blocks;
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__le16 guaranteed_block_endurance;
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u8 programs_per_page;
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u8 ppage_attr;
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u8 ecc_bits;
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u8 interleaved_bits;
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u8 interleaved_ops;
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u8 reserved3[13];
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/* electrical parameter block */
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u8 io_pin_capacitance_max;
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__le16 async_timing_mode;
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__le16 program_cache_timing_mode;
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__le16 t_prog;
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__le16 t_bers;
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__le16 t_r;
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__le16 t_ccs;
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__le16 src_sync_timing_mode;
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__le16 src_ssync_features;
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__le16 clk_pin_capacitance_typ;
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__le16 io_pin_capacitance_typ;
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__le16 input_pin_capacitance_typ;
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u8 input_pin_capacitance_max;
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u8 driver_strength_support;
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__le16 t_int_r;
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__le16 t_ald;
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u8 reserved4[7];
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/* vendor */
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__le16 vendor_revision;
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u8 vendor[88];
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__le16 crc;
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} __packed;
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#define ONFI_CRC_BASE 0x4F4E
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/* Extended ECC information Block Definition (since ONFI 2.1) */
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struct onfi_ext_ecc_info {
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u8 ecc_bits;
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u8 codeword_size;
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__le16 bb_per_lun;
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__le16 block_endurance;
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u8 reserved[2];
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} __packed;
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#define ONFI_SECTION_TYPE_0 0 /* Unused section. */
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#define ONFI_SECTION_TYPE_1 1 /* for additional sections. */
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#define ONFI_SECTION_TYPE_2 2 /* for ECC information. */
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struct onfi_ext_section {
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u8 type;
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u8 length;
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} __packed;
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#define ONFI_EXT_SECTION_MAX 8
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/* Extended Parameter Page Definition (since ONFI 2.1) */
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struct onfi_ext_param_page {
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__le16 crc;
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u8 sig[4]; /* 'E' 'P' 'P' 'S' */
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u8 reserved0[10];
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struct onfi_ext_section sections[ONFI_EXT_SECTION_MAX];
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/*
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* The actual size of the Extended Parameter Page is in
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* @ext_param_page_length of nand_onfi_params{}.
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* The following are the variable length sections.
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* So we do not add any fields below. Please see the ONFI spec.
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*/
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} __packed;
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struct nand_onfi_vendor_micron {
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u8 two_plane_read;
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u8 read_cache;
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u8 read_unique_id;
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u8 dq_imped;
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u8 dq_imped_num_settings;
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u8 dq_imped_feat_addr;
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u8 rb_pulldown_strength;
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u8 rb_pulldown_strength_feat_addr;
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u8 rb_pulldown_strength_num_settings;
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u8 otp_mode;
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u8 otp_page_start;
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u8 otp_data_prot_addr;
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u8 otp_num_pages;
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u8 otp_feat_addr;
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u8 read_retry_options;
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u8 reserved[72];
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u8 param_revision;
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} __packed;
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struct jedec_ecc_info {
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u8 ecc_bits;
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u8 codeword_size;
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__le16 bb_per_lun;
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__le16 block_endurance;
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u8 reserved[2];
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} __packed;
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/* JEDEC features */
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#define JEDEC_FEATURE_16_BIT_BUS (1 << 0)
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struct nand_jedec_params {
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/* rev info and features block */
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/* 'J' 'E' 'S' 'D' */
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u8 sig[4];
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__le16 revision;
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__le16 features;
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u8 opt_cmd[3];
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__le16 sec_cmd;
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u8 num_of_param_pages;
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u8 reserved0[18];
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/* manufacturer information block */
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char manufacturer[12];
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char model[20];
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u8 jedec_id[6];
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u8 reserved1[10];
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/* memory organization block */
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__le32 byte_per_page;
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__le16 spare_bytes_per_page;
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u8 reserved2[6];
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__le32 pages_per_block;
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__le32 blocks_per_lun;
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u8 lun_count;
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u8 addr_cycles;
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u8 bits_per_cell;
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u8 programs_per_page;
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u8 multi_plane_addr;
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u8 multi_plane_op_attr;
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u8 reserved3[38];
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/* electrical parameter block */
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__le16 async_sdr_speed_grade;
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__le16 toggle_ddr_speed_grade;
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__le16 sync_ddr_speed_grade;
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u8 async_sdr_features;
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u8 toggle_ddr_features;
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u8 sync_ddr_features;
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__le16 t_prog;
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__le16 t_bers;
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__le16 t_r;
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__le16 t_r_multi_plane;
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__le16 t_ccs;
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__le16 io_pin_capacitance_typ;
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__le16 input_pin_capacitance_typ;
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__le16 clk_pin_capacitance_typ;
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u8 driver_strength_support;
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__le16 t_ald;
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u8 reserved4[36];
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/* ECC and endurance block */
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u8 guaranteed_good_blocks;
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__le16 guaranteed_block_endurance;
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struct jedec_ecc_info ecc_info[4];
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u8 reserved5[29];
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/* reserved */
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u8 reserved6[148];
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/* vendor */
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__le16 vendor_rev_num;
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u8 reserved7[88];
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/* CRC for Parameter Page */
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__le16 crc;
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} __packed;
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/**
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* struct nand_hw_control - Control structure for hardware controller (e.g ECC generator) shared among independent devices
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* @lock: protection lock
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* @active: the mtd device which holds the controller currently
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* @wq: wait queue to sleep on if a NAND operation is in
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* progress used instead of the per chip wait queue
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* when a hw controller is available.
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*/
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struct nand_hw_control {
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spinlock_t lock;
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struct nand_chip *active;
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wait_queue_head_t wq;
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};
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/**
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* struct nand_ecc_ctrl - Control structure for ECC
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* @mode: ECC mode
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* @steps: number of ECC steps per page
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* @size: data bytes per ECC step
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* @bytes: ECC bytes per step
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* @strength: max number of correctible bits per ECC step
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* @total: total number of ECC bytes per page
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* @prepad: padding information for syndrome based ECC generators
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* @postpad: padding information for syndrome based ECC generators
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* @layout: ECC layout control struct pointer
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* @priv: pointer to private ECC control data
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* @hwctl: function to control hardware ECC generator. Must only
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* be provided if an hardware ECC is available
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* @calculate: function for ECC calculation or readback from ECC hardware
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* @correct: function for ECC correction, matching to ECC generator (sw/hw)
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* @read_page_raw: function to read a raw page without ECC. This function
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* should hide the specific layout used by the ECC
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* controller and always return contiguous in-band and
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* out-of-band data even if they're not stored
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* contiguously on the NAND chip (e.g.
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* NAND_ECC_HW_SYNDROME interleaves in-band and
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* out-of-band data).
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* @write_page_raw: function to write a raw page without ECC. This function
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* should hide the specific layout used by the ECC
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* controller and consider the passed data as contiguous
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* in-band and out-of-band data. ECC controller is
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* responsible for doing the appropriate transformations
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* to adapt to its specific layout (e.g.
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* NAND_ECC_HW_SYNDROME interleaves in-band and
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* out-of-band data).
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* @read_page: function to read a page according to the ECC generator
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* requirements; returns maximum number of bitflips corrected in
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* any single ECC step, 0 if bitflips uncorrectable, -EIO hw error
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* @read_subpage: function to read parts of the page covered by ECC;
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* returns same as read_page()
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* @write_subpage: function to write parts of the page covered by ECC.
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* @write_page: function to write a page according to the ECC generator
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* requirements.
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* @write_oob_raw: function to write chip OOB data without ECC
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* @read_oob_raw: function to read chip OOB data without ECC
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* @read_oob: function to read chip OOB data
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* @write_oob: function to write chip OOB data
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*/
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struct nand_ecc_ctrl {
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nand_ecc_modes_t mode;
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int steps;
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int size;
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|
int bytes;
|
|
int total;
|
|
int strength;
|
|
int prepad;
|
|
int postpad;
|
|
struct nand_ecclayout *layout;
|
|
void *priv;
|
|
void (*hwctl)(struct mtd_info *mtd, int mode);
|
|
int (*calculate)(struct mtd_info *mtd, const uint8_t *dat,
|
|
uint8_t *ecc_code);
|
|
int (*correct)(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc,
|
|
uint8_t *calc_ecc);
|
|
int (*read_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
uint8_t *buf, int oob_required, int page);
|
|
int (*write_page_raw)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
const uint8_t *buf, int oob_required);
|
|
int (*read_page)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
uint8_t *buf, int oob_required, int page);
|
|
int (*read_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
uint32_t offs, uint32_t len, uint8_t *buf, int page);
|
|
int (*write_subpage)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
uint32_t offset, uint32_t data_len,
|
|
const uint8_t *data_buf, int oob_required);
|
|
int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
const uint8_t *buf, int oob_required);
|
|
int (*write_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
int page);
|
|
int (*read_oob_raw)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
int page);
|
|
int (*read_oob)(struct mtd_info *mtd, struct nand_chip *chip, int page);
|
|
int (*write_oob)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
int page);
|
|
};
|
|
|
|
/**
|
|
* struct nand_buffers - buffer structure for read/write
|
|
* @ecccalc: buffer pointer for calculated ECC, size is oobsize.
|
|
* @ecccode: buffer pointer for ECC read from flash, size is oobsize.
|
|
* @databuf: buffer pointer for data, size is (page size + oobsize).
|
|
*
|
|
* Do not change the order of buffers. databuf and oobrbuf must be in
|
|
* consecutive order.
|
|
*/
|
|
struct nand_buffers {
|
|
uint8_t *ecccalc;
|
|
uint8_t *ecccode;
|
|
uint8_t *databuf;
|
|
};
|
|
|
|
/**
|
|
* struct nand_chip - NAND Private Flash Chip Data
|
|
* @IO_ADDR_R: [BOARDSPECIFIC] address to read the 8 I/O lines of the
|
|
* flash device
|
|
* @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the
|
|
* flash device.
|
|
* @dn: [BOARDSPECIFIC] device node describing this instance
|
|
* @read_byte: [REPLACEABLE] read one byte from the chip
|
|
* @read_word: [REPLACEABLE] read one word from the chip
|
|
* @write_byte: [REPLACEABLE] write a single byte to the chip on the
|
|
* low 8 I/O lines
|
|
* @write_buf: [REPLACEABLE] write data from the buffer to the chip
|
|
* @read_buf: [REPLACEABLE] read data from the chip into the buffer
|
|
* @select_chip: [REPLACEABLE] select chip nr
|
|
* @block_bad: [REPLACEABLE] check if a block is bad, using OOB markers
|
|
* @block_markbad: [REPLACEABLE] mark a block bad
|
|
* @cmd_ctrl: [BOARDSPECIFIC] hardwarespecific function for controlling
|
|
* ALE/CLE/nCE. Also used to write command and address
|
|
* @init_size: [BOARDSPECIFIC] hardwarespecific function for setting
|
|
* mtd->oobsize, mtd->writesize and so on.
|
|
* @id_data contains the 8 bytes values of NAND_CMD_READID.
|
|
* Return with the bus width.
|
|
* @dev_ready: [BOARDSPECIFIC] hardwarespecific function for accessing
|
|
* device ready/busy line. If set to NULL no access to
|
|
* ready/busy is available and the ready/busy information
|
|
* is read from the chip status register.
|
|
* @cmdfunc: [REPLACEABLE] hardwarespecific function for writing
|
|
* commands to the chip.
|
|
* @waitfunc: [REPLACEABLE] hardwarespecific function for wait on
|
|
* ready.
|
|
* @setup_read_retry: [FLASHSPECIFIC] flash (vendor) specific function for
|
|
* setting the read-retry mode. Mostly needed for MLC NAND.
|
|
* @ecc: [BOARDSPECIFIC] ECC control structure
|
|
* @buffers: buffer structure for read/write
|
|
* @hwcontrol: platform-specific hardware control structure
|
|
* @erase: [REPLACEABLE] erase function
|
|
* @scan_bbt: [REPLACEABLE] function to scan bad block table
|
|
* @chip_delay: [BOARDSPECIFIC] chip dependent delay for transferring
|
|
* data from array to read regs (tR).
|
|
* @state: [INTERN] the current state of the NAND device
|
|
* @oob_poi: "poison value buffer," used for laying out OOB data
|
|
* before writing
|
|
* @page_shift: [INTERN] number of address bits in a page (column
|
|
* address bits).
|
|
* @phys_erase_shift: [INTERN] number of address bits in a physical eraseblock
|
|
* @bbt_erase_shift: [INTERN] number of address bits in a bbt entry
|
|
* @chip_shift: [INTERN] number of address bits in one chip
|
|
* @options: [BOARDSPECIFIC] various chip options. They can partly
|
|
* be set to inform nand_scan about special functionality.
|
|
* See the defines for further explanation.
|
|
* @bbt_options: [INTERN] bad block specific options. All options used
|
|
* here must come from bbm.h. By default, these options
|
|
* will be copied to the appropriate nand_bbt_descr's.
|
|
* @badblockpos: [INTERN] position of the bad block marker in the oob
|
|
* area.
|
|
* @badblockbits: [INTERN] minimum number of set bits in a good block's
|
|
* bad block marker position; i.e., BBM == 11110111b is
|
|
* not bad when badblockbits == 7
|
|
* @bits_per_cell: [INTERN] number of bits per cell. i.e., 1 means SLC.
|
|
* @ecc_strength_ds: [INTERN] ECC correctability from the datasheet.
|
|
* Minimum amount of bit errors per @ecc_step_ds guaranteed
|
|
* to be correctable. If unknown, set to zero.
|
|
* @ecc_step_ds: [INTERN] ECC step required by the @ecc_strength_ds,
|
|
* also from the datasheet. It is the recommended ECC step
|
|
* size, if known; if unknown, set to zero.
|
|
* @onfi_timing_mode_default: [INTERN] default ONFI timing mode. This field is
|
|
* either deduced from the datasheet if the NAND
|
|
* chip is not ONFI compliant or set to 0 if it is
|
|
* (an ONFI chip is always configured in mode 0
|
|
* after a NAND reset)
|
|
* @numchips: [INTERN] number of physical chips
|
|
* @chipsize: [INTERN] the size of one chip for multichip arrays
|
|
* @pagemask: [INTERN] page number mask = number of (pages / chip) - 1
|
|
* @pagebuf: [INTERN] holds the pagenumber which is currently in
|
|
* data_buf.
|
|
* @pagebuf_bitflips: [INTERN] holds the bitflip count for the page which is
|
|
* currently in data_buf.
|
|
* @subpagesize: [INTERN] holds the subpagesize
|
|
* @onfi_version: [INTERN] holds the chip ONFI version (BCD encoded),
|
|
* non 0 if ONFI supported.
|
|
* @jedec_version: [INTERN] holds the chip JEDEC version (BCD encoded),
|
|
* non 0 if JEDEC supported.
|
|
* @onfi_params: [INTERN] holds the ONFI page parameter when ONFI is
|
|
* supported, 0 otherwise.
|
|
* @jedec_params: [INTERN] holds the JEDEC parameter page when JEDEC is
|
|
* supported, 0 otherwise.
|
|
* @read_retries: [INTERN] the number of read retry modes supported
|
|
* @onfi_set_features: [REPLACEABLE] set the features for ONFI nand
|
|
* @onfi_get_features: [REPLACEABLE] get the features for ONFI nand
|
|
* @bbt: [INTERN] bad block table pointer
|
|
* @bbt_td: [REPLACEABLE] bad block table descriptor for flash
|
|
* lookup.
|
|
* @bbt_md: [REPLACEABLE] bad block table mirror descriptor
|
|
* @badblock_pattern: [REPLACEABLE] bad block scan pattern used for initial
|
|
* bad block scan.
|
|
* @controller: [REPLACEABLE] a pointer to a hardware controller
|
|
* structure which is shared among multiple independent
|
|
* devices.
|
|
* @priv: [OPTIONAL] pointer to private chip data
|
|
* @errstat: [OPTIONAL] hardware specific function to perform
|
|
* additional error status checks (determine if errors are
|
|
* correctable).
|
|
* @write_page: [REPLACEABLE] High-level page write function
|
|
*/
|
|
|
|
struct nand_chip {
|
|
void __iomem *IO_ADDR_R;
|
|
void __iomem *IO_ADDR_W;
|
|
|
|
struct device_node *dn;
|
|
|
|
uint8_t (*read_byte)(struct mtd_info *mtd);
|
|
u16 (*read_word)(struct mtd_info *mtd);
|
|
void (*write_byte)(struct mtd_info *mtd, uint8_t byte);
|
|
void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
|
|
void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
|
|
void (*select_chip)(struct mtd_info *mtd, int chip);
|
|
int (*block_bad)(struct mtd_info *mtd, loff_t ofs, int getchip);
|
|
int (*block_markbad)(struct mtd_info *mtd, loff_t ofs);
|
|
void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
|
|
int (*init_size)(struct mtd_info *mtd, struct nand_chip *this,
|
|
u8 *id_data);
|
|
int (*dev_ready)(struct mtd_info *mtd);
|
|
void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column,
|
|
int page_addr);
|
|
int(*waitfunc)(struct mtd_info *mtd, struct nand_chip *this);
|
|
int (*erase)(struct mtd_info *mtd, int page);
|
|
int (*scan_bbt)(struct mtd_info *mtd);
|
|
int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state,
|
|
int status, int page);
|
|
int (*write_page)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
uint32_t offset, int data_len, const uint8_t *buf,
|
|
int oob_required, int page, int cached, int raw);
|
|
int (*onfi_set_features)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
int feature_addr, uint8_t *subfeature_para);
|
|
int (*onfi_get_features)(struct mtd_info *mtd, struct nand_chip *chip,
|
|
int feature_addr, uint8_t *subfeature_para);
|
|
int (*setup_read_retry)(struct mtd_info *mtd, int retry_mode);
|
|
|
|
int chip_delay;
|
|
unsigned int options;
|
|
unsigned int bbt_options;
|
|
|
|
int page_shift;
|
|
int phys_erase_shift;
|
|
int bbt_erase_shift;
|
|
int chip_shift;
|
|
int numchips;
|
|
uint64_t chipsize;
|
|
int pagemask;
|
|
int pagebuf;
|
|
unsigned int pagebuf_bitflips;
|
|
int subpagesize;
|
|
uint8_t bits_per_cell;
|
|
uint16_t ecc_strength_ds;
|
|
uint16_t ecc_step_ds;
|
|
int onfi_timing_mode_default;
|
|
int badblockpos;
|
|
int badblockbits;
|
|
|
|
int onfi_version;
|
|
int jedec_version;
|
|
union {
|
|
struct nand_onfi_params onfi_params;
|
|
struct nand_jedec_params jedec_params;
|
|
};
|
|
|
|
int read_retries;
|
|
|
|
flstate_t state;
|
|
|
|
uint8_t *oob_poi;
|
|
struct nand_hw_control *controller;
|
|
|
|
struct nand_ecc_ctrl ecc;
|
|
struct nand_buffers *buffers;
|
|
struct nand_hw_control hwcontrol;
|
|
|
|
uint8_t *bbt;
|
|
struct nand_bbt_descr *bbt_td;
|
|
struct nand_bbt_descr *bbt_md;
|
|
|
|
struct nand_bbt_descr *badblock_pattern;
|
|
|
|
void *priv;
|
|
};
|
|
|
|
/*
|
|
* NAND Flash Manufacturer ID Codes
|
|
*/
|
|
#define NAND_MFR_TOSHIBA 0x98
|
|
#define NAND_MFR_SAMSUNG 0xec
|
|
#define NAND_MFR_FUJITSU 0x04
|
|
#define NAND_MFR_NATIONAL 0x8f
|
|
#define NAND_MFR_RENESAS 0x07
|
|
#define NAND_MFR_STMICRO 0x20
|
|
#define NAND_MFR_HYNIX 0xad
|
|
#define NAND_MFR_MICRON 0x2c
|
|
#define NAND_MFR_AMD 0x01
|
|
#define NAND_MFR_MACRONIX 0xc2
|
|
#define NAND_MFR_EON 0x92
|
|
#define NAND_MFR_SANDISK 0x45
|
|
#define NAND_MFR_INTEL 0x89
|
|
#define NAND_MFR_ATO 0x9b
|
|
|
|
/* The maximum expected count of bytes in the NAND ID sequence */
|
|
#define NAND_MAX_ID_LEN 8
|
|
|
|
/*
|
|
* A helper for defining older NAND chips where the second ID byte fully
|
|
* defined the chip, including the geometry (chip size, eraseblock size, page
|
|
* size). All these chips have 512 bytes NAND page size.
|
|
*/
|
|
#define LEGACY_ID_NAND(nm, devid, chipsz, erasesz, opts) \
|
|
{ .name = (nm), {{ .dev_id = (devid) }}, .pagesize = 512, \
|
|
.chipsize = (chipsz), .erasesize = (erasesz), .options = (opts) }
|
|
|
|
/*
|
|
* A helper for defining newer chips which report their page size and
|
|
* eraseblock size via the extended ID bytes.
|
|
*
|
|
* The real difference between LEGACY_ID_NAND and EXTENDED_ID_NAND is that with
|
|
* EXTENDED_ID_NAND, manufacturers overloaded the same device ID so that the
|
|
* device ID now only represented a particular total chip size (and voltage,
|
|
* buswidth), and the page size, eraseblock size, and OOB size could vary while
|
|
* using the same device ID.
|
|
*/
|
|
#define EXTENDED_ID_NAND(nm, devid, chipsz, opts) \
|
|
{ .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \
|
|
.options = (opts) }
|
|
|
|
#define NAND_ECC_INFO(_strength, _step) \
|
|
{ .strength_ds = (_strength), .step_ds = (_step) }
|
|
#define NAND_ECC_STRENGTH(type) ((type)->ecc.strength_ds)
|
|
#define NAND_ECC_STEP(type) ((type)->ecc.step_ds)
|
|
|
|
/**
|
|
* struct nand_flash_dev - NAND Flash Device ID Structure
|
|
* @name: a human-readable name of the NAND chip
|
|
* @dev_id: the device ID (the second byte of the full chip ID array)
|
|
* @mfr_id: manufecturer ID part of the full chip ID array (refers the same
|
|
* memory address as @id[0])
|
|
* @dev_id: device ID part of the full chip ID array (refers the same memory
|
|
* address as @id[1])
|
|
* @id: full device ID array
|
|
* @pagesize: size of the NAND page in bytes; if 0, then the real page size (as
|
|
* well as the eraseblock size) is determined from the extended NAND
|
|
* chip ID array)
|
|
* @chipsize: total chip size in MiB
|
|
* @erasesize: eraseblock size in bytes (determined from the extended ID if 0)
|
|
* @options: stores various chip bit options
|
|
* @id_len: The valid length of the @id.
|
|
* @oobsize: OOB size
|
|
* @ecc: ECC correctability and step information from the datasheet.
|
|
* @ecc.strength_ds: The ECC correctability from the datasheet, same as the
|
|
* @ecc_strength_ds in nand_chip{}.
|
|
* @ecc.step_ds: The ECC step required by the @ecc.strength_ds, same as the
|
|
* @ecc_step_ds in nand_chip{}, also from the datasheet.
|
|
* For example, the "4bit ECC for each 512Byte" can be set with
|
|
* NAND_ECC_INFO(4, 512).
|
|
* @onfi_timing_mode_default: the default ONFI timing mode entered after a NAND
|
|
* reset. Should be deduced from timings described
|
|
* in the datasheet.
|
|
*
|
|
*/
|
|
struct nand_flash_dev {
|
|
char *name;
|
|
union {
|
|
struct {
|
|
uint8_t mfr_id;
|
|
uint8_t dev_id;
|
|
};
|
|
uint8_t id[NAND_MAX_ID_LEN];
|
|
};
|
|
unsigned int pagesize;
|
|
unsigned int chipsize;
|
|
unsigned int erasesize;
|
|
unsigned int options;
|
|
uint16_t id_len;
|
|
uint16_t oobsize;
|
|
struct {
|
|
uint16_t strength_ds;
|
|
uint16_t step_ds;
|
|
} ecc;
|
|
int onfi_timing_mode_default;
|
|
};
|
|
|
|
/**
|
|
* struct nand_manufacturers - NAND Flash Manufacturer ID Structure
|
|
* @name: Manufacturer name
|
|
* @id: manufacturer ID code of device.
|
|
*/
|
|
struct nand_manufacturers {
|
|
int id;
|
|
char *name;
|
|
};
|
|
|
|
extern struct nand_flash_dev nand_flash_ids[];
|
|
extern struct nand_manufacturers nand_manuf_ids[];
|
|
|
|
extern int nand_default_bbt(struct mtd_info *mtd);
|
|
extern int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
|
|
extern int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs);
|
|
extern int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt);
|
|
extern int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
|
|
int allowbbt);
|
|
extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len,
|
|
size_t *retlen, uint8_t *buf);
|
|
|
|
/**
|
|
* struct platform_nand_chip - chip level device structure
|
|
* @nr_chips: max. number of chips to scan for
|
|
* @chip_offset: chip number offset
|
|
* @nr_partitions: number of partitions pointed to by partitions (or zero)
|
|
* @partitions: mtd partition list
|
|
* @chip_delay: R/B delay value in us
|
|
* @options: Option flags, e.g. 16bit buswidth
|
|
* @bbt_options: BBT option flags, e.g. NAND_BBT_USE_FLASH
|
|
* @ecclayout: ECC layout info structure
|
|
* @part_probe_types: NULL-terminated array of probe types
|
|
*/
|
|
struct platform_nand_chip {
|
|
int nr_chips;
|
|
int chip_offset;
|
|
int nr_partitions;
|
|
struct mtd_partition *partitions;
|
|
struct nand_ecclayout *ecclayout;
|
|
int chip_delay;
|
|
unsigned int options;
|
|
unsigned int bbt_options;
|
|
const char **part_probe_types;
|
|
};
|
|
|
|
/* Keep gcc happy */
|
|
struct platform_device;
|
|
|
|
/**
|
|
* struct platform_nand_ctrl - controller level device structure
|
|
* @probe: platform specific function to probe/setup hardware
|
|
* @remove: platform specific function to remove/teardown hardware
|
|
* @hwcontrol: platform specific hardware control structure
|
|
* @dev_ready: platform specific function to read ready/busy pin
|
|
* @select_chip: platform specific chip select function
|
|
* @cmd_ctrl: platform specific function for controlling
|
|
* ALE/CLE/nCE. Also used to write command and address
|
|
* @write_buf: platform specific function for write buffer
|
|
* @read_buf: platform specific function for read buffer
|
|
* @read_byte: platform specific function to read one byte from chip
|
|
* @priv: private data to transport driver specific settings
|
|
*
|
|
* All fields are optional and depend on the hardware driver requirements
|
|
*/
|
|
struct platform_nand_ctrl {
|
|
int (*probe)(struct platform_device *pdev);
|
|
void (*remove)(struct platform_device *pdev);
|
|
void (*hwcontrol)(struct mtd_info *mtd, int cmd);
|
|
int (*dev_ready)(struct mtd_info *mtd);
|
|
void (*select_chip)(struct mtd_info *mtd, int chip);
|
|
void (*cmd_ctrl)(struct mtd_info *mtd, int dat, unsigned int ctrl);
|
|
void (*write_buf)(struct mtd_info *mtd, const uint8_t *buf, int len);
|
|
void (*read_buf)(struct mtd_info *mtd, uint8_t *buf, int len);
|
|
unsigned char (*read_byte)(struct mtd_info *mtd);
|
|
void *priv;
|
|
};
|
|
|
|
/**
|
|
* struct platform_nand_data - container structure for platform-specific data
|
|
* @chip: chip level chip structure
|
|
* @ctrl: controller level device structure
|
|
*/
|
|
struct platform_nand_data {
|
|
struct platform_nand_chip chip;
|
|
struct platform_nand_ctrl ctrl;
|
|
};
|
|
|
|
/* Some helpers to access the data structures */
|
|
static inline
|
|
struct platform_nand_chip *get_platform_nandchip(struct mtd_info *mtd)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
return chip->priv;
|
|
}
|
|
|
|
/* return the supported features. */
|
|
static inline int onfi_feature(struct nand_chip *chip)
|
|
{
|
|
return chip->onfi_version ? le16_to_cpu(chip->onfi_params.features) : 0;
|
|
}
|
|
|
|
/* return the supported asynchronous timing mode. */
|
|
static inline int onfi_get_async_timing_mode(struct nand_chip *chip)
|
|
{
|
|
if (!chip->onfi_version)
|
|
return ONFI_TIMING_MODE_UNKNOWN;
|
|
return le16_to_cpu(chip->onfi_params.async_timing_mode);
|
|
}
|
|
|
|
/* return the supported synchronous timing mode. */
|
|
static inline int onfi_get_sync_timing_mode(struct nand_chip *chip)
|
|
{
|
|
if (!chip->onfi_version)
|
|
return ONFI_TIMING_MODE_UNKNOWN;
|
|
return le16_to_cpu(chip->onfi_params.src_sync_timing_mode);
|
|
}
|
|
|
|
/*
|
|
* Check if it is a SLC nand.
|
|
* The !nand_is_slc() can be used to check the MLC/TLC nand chips.
|
|
* We do not distinguish the MLC and TLC now.
|
|
*/
|
|
static inline bool nand_is_slc(struct nand_chip *chip)
|
|
{
|
|
return chip->bits_per_cell == 1;
|
|
}
|
|
|
|
/**
|
|
* Check if the opcode's address should be sent only on the lower 8 bits
|
|
* @command: opcode to check
|
|
*/
|
|
static inline int nand_opcode_8bits(unsigned int command)
|
|
{
|
|
switch (command) {
|
|
case NAND_CMD_READID:
|
|
case NAND_CMD_PARAM:
|
|
case NAND_CMD_GET_FEATURES:
|
|
case NAND_CMD_SET_FEATURES:
|
|
return 1;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* return the supported JEDEC features. */
|
|
static inline int jedec_feature(struct nand_chip *chip)
|
|
{
|
|
return chip->jedec_version ? le16_to_cpu(chip->jedec_params.features)
|
|
: 0;
|
|
}
|
|
|
|
/*
|
|
* struct nand_sdr_timings - SDR NAND chip timings
|
|
*
|
|
* This struct defines the timing requirements of a SDR NAND chip.
|
|
* These informations can be found in every NAND datasheets and the timings
|
|
* meaning are described in the ONFI specifications:
|
|
* www.onfi.org/~/media/ONFI/specs/onfi_3_1_spec.pdf (chapter 4.15 Timing
|
|
* Parameters)
|
|
*
|
|
* All these timings are expressed in picoseconds.
|
|
*/
|
|
|
|
struct nand_sdr_timings {
|
|
u32 tALH_min;
|
|
u32 tADL_min;
|
|
u32 tALS_min;
|
|
u32 tAR_min;
|
|
u32 tCEA_max;
|
|
u32 tCEH_min;
|
|
u32 tCH_min;
|
|
u32 tCHZ_max;
|
|
u32 tCLH_min;
|
|
u32 tCLR_min;
|
|
u32 tCLS_min;
|
|
u32 tCOH_min;
|
|
u32 tCS_min;
|
|
u32 tDH_min;
|
|
u32 tDS_min;
|
|
u32 tFEAT_max;
|
|
u32 tIR_min;
|
|
u32 tITC_max;
|
|
u32 tRC_min;
|
|
u32 tREA_max;
|
|
u32 tREH_min;
|
|
u32 tRHOH_min;
|
|
u32 tRHW_min;
|
|
u32 tRHZ_max;
|
|
u32 tRLOH_min;
|
|
u32 tRP_min;
|
|
u32 tRR_min;
|
|
u64 tRST_max;
|
|
u32 tWB_max;
|
|
u32 tWC_min;
|
|
u32 tWH_min;
|
|
u32 tWHR_min;
|
|
u32 tWP_min;
|
|
u32 tWW_min;
|
|
};
|
|
|
|
/* get timing characteristics from ONFI timing mode. */
|
|
const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode);
|
|
#endif /* __LINUX_MTD_NAND_H */
|