mtd: add helpers to set/get features for ONFI nand (7db03ecc) · Commits · 戴 / test

drivers/mtd/nand/nand_base.c

+50 −0

Original line number	Diff line number	Diff line
		@@ -2699,6 +2699,50 @@ static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
		return chip->block_markbad(mtd, ofs);
		}

		/**
		* nand_onfi_set_features- [REPLACEABLE] set features for ONFI nand
		* @mtd: MTD device structure
		* @chip: nand chip info structure
		* @addr: feature address.
		* @subfeature_param: the subfeature parameters, a four bytes array.
		*/
		static int nand_onfi_set_features(struct mtd_info mtd, struct nand_chip chip,
		int addr, uint8_t *subfeature_param)
		{
		int status;

		if (!chip->onfi_version)
		return -EINVAL;

		chip->cmdfunc(mtd, NAND_CMD_SET_FEATURES, addr, -1);
		chip->write_buf(mtd, subfeature_param, ONFI_SUBFEATURE_PARAM_LEN);
		status = chip->waitfunc(mtd, chip);
		if (status & NAND_STATUS_FAIL)
		return -EIO;
		return 0;
		}

		/**
		* nand_onfi_get_features- [REPLACEABLE] get features for ONFI nand
		* @mtd: MTD device structure
		* @chip: nand chip info structure
		* @addr: feature address.
		* @subfeature_param: the subfeature parameters, a four bytes array.
		*/
		static int nand_onfi_get_features(struct mtd_info mtd, struct nand_chip chip,
		int addr, uint8_t *subfeature_param)
		{
		if (!chip->onfi_version)
		return -EINVAL;

		/* clear the sub feature parameters */
		memset(subfeature_param, 0, ONFI_SUBFEATURE_PARAM_LEN);

		chip->cmdfunc(mtd, NAND_CMD_GET_FEATURES, addr, -1);
		chip->read_buf(mtd, subfeature_param, ONFI_SUBFEATURE_PARAM_LEN);
		return 0;
		}

		/**
		* nand_suspend - [MTD Interface] Suspend the NAND flash
		* @mtd: MTD device structure
		@@ -3223,6 +3267,12 @@ int nand_scan_tail(struct mtd_info *mtd)
		if (!chip->write_page)
		chip->write_page = nand_write_page;

		/* set for ONFI nand */
		if (!chip->onfi_set_features)
		chip->onfi_set_features = nand_onfi_set_features;
		if (!chip->onfi_get_features)
		chip->onfi_get_features = nand_onfi_get_features;

		/*
		* Check ECC mode, default to software if 3byte/512byte hardware ECC is
		* selected and we have 256 byte pagesize fallback to software ECC

include/linux/mtd/nand.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -92,6 +92,8 @@ extern int nand_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len);
		#define NAND_CMD_READID 0x90
		#define NAND_CMD_ERASE2 0xd0
		#define NAND_CMD_PARAM 0xec
		#define NAND_CMD_GET_FEATURES 0xee
		#define NAND_CMD_SET_FEATURES 0xef
		#define NAND_CMD_RESET 0xff

		#define NAND_CMD_LOCK 0x2a
		@@ -229,6 +231,12 @@ typedef enum {
		/* Keep gcc happy */
		struct nand_chip;

		/* ONFI feature address */
		#define ONFI_FEATURE_ADDR_TIMING_MODE 0x1

		/* ONFI subfeature parameters length */
		#define ONFI_SUBFEATURE_PARAM_LEN 4

		struct nand_onfi_params {
		/* rev info and features block */
		/* 'O' 'N' 'F' 'I' */
		@@ -454,6 +462,8 @@ struct nand_buffers {
		* non 0 if ONFI supported.
		* @onfi_params: [INTERN] holds the ONFI page parameter when ONFI is
		* supported, 0 otherwise.
		* @onfi_set_features [REPLACEABLE] set the features for ONFI nand
		* @onfi_get_features [REPLACEABLE] get the features for ONFI nand
		* @ecclayout: [REPLACEABLE] the default ECC placement scheme
		* @bbt: [INTERN] bad block table pointer
		* @bbt_td: [REPLACEABLE] bad block table descriptor for flash
		@@ -496,6 +506,10 @@ struct nand_chip {
		int (write_page)(struct mtd_info mtd, struct nand_chip *chip,
		const uint8_t *buf, int oob_required, int page,
		int cached, int raw);
		int (onfi_set_features)(struct mtd_info mtd, struct nand_chip *chip,
		int feature_addr, uint8_t *subfeature_para);
		int (onfi_get_features)(struct mtd_info mtd, struct nand_chip *chip,
		int feature_addr, uint8_t *subfeature_para);

		int chip_delay;
		unsigned int options;

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