diff options
Diffstat (limited to 'include/mxs_nand.h')
| -rw-r--r-- | include/mxs_nand.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/include/mxs_nand.h b/include/mxs_nand.h new file mode 100644 index 0000000..4bd65cd --- /dev/null +++ b/include/mxs_nand.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * NXP GPMI NAND flash driver + * + * Copyright (C) 2018 Toradex + * Authors: + * Stefan Agner <stefan.agner@toradex.com> + */ + +#include <linux/mtd/mtd.h> +#include <asm/cache.h> +#include <nand.h> +#include <asm/mach-imx/dma.h> + +/** + * @gf_len: The length of Galois Field. (e.g., 13 or 14) + * @ecc_strength: A number that describes the strength of the ECC + * algorithm. + * @ecc_chunk_size: The size, in bytes, of a single ECC chunk. Note + * the first chunk in the page includes both data and + * metadata, so it's a bit larger than this value. + * @ecc_chunk_count: The number of ECC chunks in the page, + * @block_mark_byte_offset: The byte offset in the ECC-based page view at + * which the underlying physical block mark appears. + * @block_mark_bit_offset: The bit offset into the ECC-based page view at + * which the underlying physical block mark appears. + */ +struct bch_geometry { + unsigned int gf_len; + unsigned int ecc_strength; + unsigned int ecc_chunk_size; + unsigned int ecc_chunk_count; + unsigned int block_mark_byte_offset; + unsigned int block_mark_bit_offset; +}; + +struct mxs_nand_info { + struct nand_chip chip; + struct udevice *dev; + unsigned int max_ecc_strength_supported; + bool use_minimum_ecc; + int cur_chip; + + uint32_t cmd_queue_len; + uint32_t data_buf_size; + struct bch_geometry bch_geometry; + + uint8_t *cmd_buf; + uint8_t *data_buf; + uint8_t *oob_buf; + + uint8_t marking_block_bad; + uint8_t raw_oob_mode; + + struct mxs_gpmi_regs *gpmi_regs; + struct mxs_bch_regs *bch_regs; + + /* Functions with altered behaviour */ + int (*hooked_read_oob)(struct mtd_info *mtd, + loff_t from, struct mtd_oob_ops *ops); + int (*hooked_write_oob)(struct mtd_info *mtd, + loff_t to, struct mtd_oob_ops *ops); + int (*hooked_block_markbad)(struct mtd_info *mtd, + loff_t ofs); + + /* DMA descriptors */ + struct mxs_dma_desc **desc; + uint32_t desc_index; +}; + +int mxs_nand_init_ctrl(struct mxs_nand_info *nand_info); +int mxs_nand_init_spl(struct nand_chip *nand); +int mxs_nand_setup_ecc(struct mtd_info *mtd); |