/**
* struct nand_ecc_ctrl - Control structure for ecc
* @mode: ecc mode
* @steps: number of ecc steps per page
* @size: data bytes per ecc step
* @bytes: ecc bytes per step
* @total: total number of ecc bytes per page
* @prepad: padding information for syndrome based ecc generators
* @postpad: padding information for syndrome based ecc generators
* @layout: ECC layout control struct pointer
* @hwctl: function to control hardware ecc generator. Must only
* be provided if an hardware ECC is available
* @calculate: function for ecc calculation or readback from ecc hardware
* @correct: function for ecc correction, matching to ecc generator (sw/hw)
* @read_page_raw: function to read a raw page without ECC
* @write_page_raw: function to write a raw page without ECC
* @read_page: function to read a page according to the ecc generator requirements
* @write_page: function to write a page according to the ecc generator requirements
* @read_oob: function to read chip OOB data
* @write_oob: function to write chip OOB data
*/
struct nand_ecc_ctrl {
nand_ecc_modes_t mode;
int steps;
int size;
int bytes;
int total;
int prepad;
int postpad;
struct nand_ecclayout *layout;
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);
void (*write_page_raw)(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf);
int (*read_page)(struct mtd_info *mtd,
struct nand_chip *chip,
uint8_t *buf);
void (*write_page)(struct mtd_info *mtd,
struct nand_chip *chip,
const uint8_t *buf);
int (*read_oob)(struct mtd_info *mtd,
struct nand_chip *chip,
int page,
int sndcmd);
int (*write_oob)(struct mtd_info *mtd,
struct nand_chip *chip,
int page);
};
请教一下结构体struct nand_ecc_ctrl 中的 size: data bytes per ecc step，具体含义是什么呢？我不太理解。nandflash相关内容我也看过。希望有经验的高手给我解释一下。。。
