Commit 6154c7a5 authored by Mikhail Kshevetskiy's avatar Mikhail Kshevetskiy Committed by Miquel Raynal
Browse files

mtd: spinand: winbond: add Winbond W25N02KV flash support 



Add support of Winbond W25N02KV flash

Signed-off-by: default avatarMikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Reviewed-by: default avatarFrieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20221010105110.446674-2-mikhail.kshevetskiy@iopsys.eu
parent dbf70fc2

drivers/mtd/nand/spi/winbond.c

+75 −0
Original line number Diff line number Diff line
@@ -74,6 +74,72 @@ static int w25m02gv_select_target(struct spinand_device *spinand, 
	return spi_mem_exec_op(spinand->spimem, &op);

}



static int w25n02kv_ooblayout_ecc(struct mtd_info *mtd, int section,

				  struct mtd_oob_region *region)

{

	if (section > 3)

		return -ERANGE;



	region->offset = 64 + (16 * section);

	region->length = 13;



	return 0;

}



static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section,

				   struct mtd_oob_region *region)

{

	if (section > 3)

		return -ERANGE;



	region->offset = (16 * section) + 2;

	region->length = 14;



	return 0;

}



static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {

	.ecc = w25n02kv_ooblayout_ecc,

	.free = w25n02kv_ooblayout_free,

};



static int w25n02kv_ecc_get_status(struct spinand_device *spinand,

				   u8 status)

{

	struct nand_device *nand = spinand_to_nand(spinand);

	u8 mbf = 0;

	struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf);



	switch (status & STATUS_ECC_MASK) {

	case STATUS_ECC_NO_BITFLIPS:

		return 0;



	case STATUS_ECC_UNCOR_ERROR:

		return -EBADMSG;



	case STATUS_ECC_HAS_BITFLIPS:

		/*

		 * Let's try to retrieve the real maximum number of bitflips

		 * in order to avoid forcing the wear-leveling layer to move

		 * data around if it's not necessary.

		 */

		if (spi_mem_exec_op(spinand->spimem, &op))

			return nanddev_get_ecc_conf(nand)->strength;



		mbf >>= 4;



		if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf))

			return nanddev_get_ecc_conf(nand)->strength;



		return mbf;



	default:

		break;

	}



	return -EINVAL;

}



static const struct spinand_info winbond_spinand_table[] = {

	SPINAND_INFO("W25M02GV",

		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab, 0x21),
@@ -94,6 +160,15 @@ static const struct spinand_info winbond_spinand_table[] = { 
					      &update_cache_variants),

		     0,

		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),

	SPINAND_INFO("W25N02KV",

		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x22),

		     NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),

		     NAND_ECCREQ(8, 512),

		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,

					      &write_cache_variants,

					      &update_cache_variants),

		     0,

		     SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)),

};



static int winbond_spinand_init(struct spinand_device *spinand)