1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * NXP GPMI NAND flash driver
5 * Copyright (C) 2018 Toradex
7 * Stefan Agner <stefan.agner@toradex.com>
10 #include <linux/mtd/mtd.h>
11 #include <asm/cache.h>
13 #include <asm/mach-imx/dma.h>
16 * @gf_len: The length of Galois Field. (e.g., 13 or 14)
17 * @ecc_strength: A number that describes the strength of the ECC
19 * @ecc_chunk_size: The size, in bytes, of a single ECC chunk. Note
20 * the first chunk in the page includes both data and
21 * metadata, so it's a bit larger than this value.
22 * @ecc_chunk_count: The number of ECC chunks in the page,
23 * @block_mark_byte_offset: The byte offset in the ECC-based page view at
24 * which the underlying physical block mark appears.
25 * @block_mark_bit_offset: The bit offset into the ECC-based page view at
26 * which the underlying physical block mark appears.
30 unsigned int ecc_strength;
31 unsigned int ecc_chunk_size;
32 unsigned int ecc_chunk_count;
33 unsigned int block_mark_byte_offset;
34 unsigned int block_mark_bit_offset;
37 struct mxs_nand_info {
38 struct nand_chip chip;
40 unsigned int max_ecc_strength_supported;
44 uint32_t cmd_queue_len;
45 uint32_t data_buf_size;
46 struct bch_geometry bch_geometry;
52 uint8_t marking_block_bad;
55 struct mxs_gpmi_regs *gpmi_regs;
56 struct mxs_bch_regs *bch_regs;
58 /* Functions with altered behaviour */
59 int (*hooked_read_oob)(struct mtd_info *mtd,
60 loff_t from, struct mtd_oob_ops *ops);
61 int (*hooked_write_oob)(struct mtd_info *mtd,
62 loff_t to, struct mtd_oob_ops *ops);
63 int (*hooked_block_markbad)(struct mtd_info *mtd,
67 struct mxs_dma_desc **desc;
70 /* Hardware BCH interface and randomizer */
74 u32 bch_flash0layout0;
75 u32 bch_flash0layout1;
78 struct mxs_nand_layout {
87 int mxs_nand_init_ctrl(struct mxs_nand_info *nand_info);
88 int mxs_nand_init_spl(struct nand_chip *nand);
89 int mxs_nand_setup_ecc(struct mtd_info *mtd);
91 void mxs_nand_mode_fcb(struct mtd_info *mtd);
92 void mxs_nand_mode_normal(struct mtd_info *mtd);
93 u32 mxs_nand_mark_byte_offset(struct mtd_info *mtd);
94 u32 mxs_nand_mark_bit_offset(struct mtd_info *mtd);
95 void mxs_nand_get_layout(struct mtd_info *mtd, struct mxs_nand_layout *l);