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9ab5f221a5
On i.MX7 in a sake of reducing the disturbances caused by a neighboring cells in the FCB page in the NAND chip, a randomizer is enabled when reading the FCB page by ROM bootloader. Add API for setting BCH to specific layout (and restoring it back) used by ROM bootloader to be able to burn it in a proper way to NAND using nandbcb command. Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com> Signed-off-by: Anti Sullin <anti.sullin@artecdesign.ee> Tested-by: Max Krummenacher <max.krummenacher@toradex.com> Reviewed-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* NXP GPMI NAND flash driver
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*
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* Copyright (C) 2018 Toradex
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* Authors:
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* Stefan Agner <stefan.agner@toradex.com>
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*/
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#include <linux/mtd/mtd.h>
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#include <asm/cache.h>
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#include <nand.h>
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#include <asm/mach-imx/dma.h>
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/**
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* @gf_len: The length of Galois Field. (e.g., 13 or 14)
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* @ecc_strength: A number that describes the strength of the ECC
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* algorithm.
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* @ecc_chunk_size: The size, in bytes, of a single ECC chunk. Note
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* the first chunk in the page includes both data and
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* metadata, so it's a bit larger than this value.
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* @ecc_chunk_count: The number of ECC chunks in the page,
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* @block_mark_byte_offset: The byte offset in the ECC-based page view at
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* which the underlying physical block mark appears.
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* @block_mark_bit_offset: The bit offset into the ECC-based page view at
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* which the underlying physical block mark appears.
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*/
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struct bch_geometry {
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unsigned int gf_len;
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unsigned int ecc_strength;
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unsigned int ecc_chunk_size;
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unsigned int ecc_chunk_count;
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unsigned int block_mark_byte_offset;
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unsigned int block_mark_bit_offset;
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};
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struct mxs_nand_info {
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struct nand_chip chip;
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struct udevice *dev;
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unsigned int max_ecc_strength_supported;
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bool use_minimum_ecc;
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int cur_chip;
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uint32_t cmd_queue_len;
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uint32_t data_buf_size;
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struct bch_geometry bch_geometry;
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uint8_t *cmd_buf;
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uint8_t *data_buf;
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uint8_t *oob_buf;
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uint8_t marking_block_bad;
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uint8_t raw_oob_mode;
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struct mxs_gpmi_regs *gpmi_regs;
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struct mxs_bch_regs *bch_regs;
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/* Functions with altered behaviour */
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int (*hooked_read_oob)(struct mtd_info *mtd,
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loff_t from, struct mtd_oob_ops *ops);
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int (*hooked_write_oob)(struct mtd_info *mtd,
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loff_t to, struct mtd_oob_ops *ops);
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int (*hooked_block_markbad)(struct mtd_info *mtd,
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loff_t ofs);
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/* DMA descriptors */
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struct mxs_dma_desc **desc;
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uint32_t desc_index;
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/* Hardware BCH interface and randomizer */
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u32 en_randomizer;
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u32 writesize;
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u32 oobsize;
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u32 bch_flash0layout0;
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u32 bch_flash0layout1;
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};
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struct mxs_nand_layout {
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u32 nblocks;
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u32 meta_size;
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u32 data0_size;
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u32 ecc0;
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u32 datan_size;
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u32 eccn;
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};
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int mxs_nand_init_ctrl(struct mxs_nand_info *nand_info);
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int mxs_nand_init_spl(struct nand_chip *nand);
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int mxs_nand_setup_ecc(struct mtd_info *mtd);
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void mxs_nand_mode_fcb(struct mtd_info *mtd);
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void mxs_nand_mode_normal(struct mtd_info *mtd);
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u32 mxs_nand_mark_byte_offset(struct mtd_info *mtd);
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u32 mxs_nand_mark_bit_offset(struct mtd_info *mtd);
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void mxs_nand_get_layout(struct mtd_info *mtd, struct mxs_nand_layout *l);
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