Commit f6dffe2a authored by Mikhail Zhilkin's avatar Mikhail Zhilkin Committed by Miquel Raynal
Browse files

mtd: spinand: add support for FudanMicro FM25S01BI3 

Add support for FudanMicro FM25S01BI3 SPI NAND.

Link: https://www.fmsh.com/nvm/FM25S01BI3_ds_eng.pdf



Signed-off-by: default avatarMikhail Zhilkin <csharper2005@gmail.com>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
parent a3623e1a

drivers/mtd/nand/spi/fmsh.c

+72 −0
Original line number Diff line number Diff line
@@ -9,6 +9,13 @@ 
#include <linux/kernel.h>

#include <linux/mtd/spinand.h>



#define FM25S01BI3_STATUS_ECC_MASK		(7 << 4)

	#define FM25S01BI3_STATUS_ECC_NO_BITFLIPS	(0 << 4)

	#define FM25S01BI3_STATUS_ECC_1_3_BITFLIPS	(1 << 4)

	#define FM25S01BI3_STATUS_ECC_UNCOR_ERROR	(2 << 4)

	#define FM25S01BI3_STATUS_ECC_4_6_BITFLIPS	(3 << 4)

	#define FM25S01BI3_STATUS_ECC_7_8_BITFLIPS	(5 << 4)



#define SPINAND_MFR_FMSH		0xA1



static SPINAND_OP_VARIANTS(read_cache_variants,
@@ -45,11 +52,66 @@ static int fm25s01a_ooblayout_free(struct mtd_info *mtd, int section, 
	return 0;

}



static int fm25s01bi3_ecc_get_status(struct spinand_device *spinand,

				     u8 status)

{

	switch (status & FM25S01BI3_STATUS_ECC_MASK) {

	case FM25S01BI3_STATUS_ECC_NO_BITFLIPS:

		return 0;



	case FM25S01BI3_STATUS_ECC_UNCOR_ERROR:

		return -EBADMSG;



	case FM25S01BI3_STATUS_ECC_1_3_BITFLIPS:

		return 3;



	case FM25S01BI3_STATUS_ECC_4_6_BITFLIPS:

		return 6;



	case FM25S01BI3_STATUS_ECC_7_8_BITFLIPS:

		return 8;



	default:

		break;

	}



	return -EINVAL;

}



static int fm25s01bi3_ooblayout_ecc(struct mtd_info *mtd, int section,

				    struct mtd_oob_region *region)

{

	if (section)

		return -ERANGE;



	region->offset = 64;

	region->length = 64;



	return 0;

}



static int fm25s01bi3_ooblayout_free(struct mtd_info *mtd, int section,

				     struct mtd_oob_region *region)

{

	if (section > 3)

		return -ERANGE;



	region->offset = (16 * section) + 4;

	region->length = 12;



	return 0;

}



static const struct mtd_ooblayout_ops fm25s01a_ooblayout = {

	.ecc = fm25s01a_ooblayout_ecc,

	.free = fm25s01a_ooblayout_free,

};



static const struct mtd_ooblayout_ops fm25s01bi3_ooblayout = {

	.ecc = fm25s01bi3_ooblayout_ecc,

	.free = fm25s01bi3_ooblayout_free,

};



static const struct spinand_info fmsh_spinand_table[] = {

	SPINAND_INFO("FM25S01A",

		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4),
@@ -60,6 +122,16 @@ static const struct spinand_info fmsh_spinand_table[] = { 
					      &update_cache_variants),

		     SPINAND_HAS_QE_BIT,

		     SPINAND_ECCINFO(&fm25s01a_ooblayout, NULL)),

	SPINAND_INFO("FM25S01BI3",

		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xd4),

		     NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),

		     NAND_ECCREQ(8, 512),

		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,

					      &write_cache_variants,

					      &update_cache_variants),

		     SPINAND_HAS_QE_BIT,

		     SPINAND_ECCINFO(&fm25s01bi3_ooblayout,

				      fm25s01bi3_ecc_get_status)),

};



static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops = {