Commit 9577f44a authored by Thomas Gleixner's avatar Thomas Gleixner Committed by David Woodhouse
Browse files

[MTD] NAND Add read/write function pointers to struct nand_ecc_ctrl 



Add read/write function pointers to struct nand_ecc_ctrl to
prepare the modulaization of nand_read/write functions. The
current implementation handles every type of ecc mode
software/hardware and all kinds of strange ecc placement
schemes in one switch/if construct. Thats too complex to
maintain and too inflexible to expand. Modularization will
also shorten the code pathes of the read/write functions.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 7fac4648

include/linux/mtd/nand.h

+13 −0
Original line number Diff line number Diff line
@@ -233,16 +233,23 @@ struct nand_hw_control { 
 * @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

 * @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)

 * @write_page:	function to write a page according to the ecc generator requirements

 */

struct nand_ecc_ctrl {

	nand_ecc_modes_t	mode;

	int			steps;

	int			size;

	int			bytes;

	int			total;

	int			prepad;

	int			postpad;

	void			(*hwctl)(struct mtd_info *mtd, int mode);

	int			(*calculate)(struct mtd_info *mtd,

					     const uint8_t *dat,
@@ -250,6 +257,12 @@ struct nand_ecc_ctrl { 
	int			(*correct)(struct mtd_info *mtd, uint8_t *dat,

					   uint8_t *read_ecc,

					   uint8_t *calc_ecc);

	int			(*read_page)(struct mtd_info *mtd,

					     struct nand_chip *chip,

					     uint8_t *buf);

	int			(*write_page)(struct mtd_info *mtd,

					      struct nand_chip *chip,

					      uint8_t *buf, int cached);

};



/**

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