diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/891-v6.2-mtd-spinand-winbond-add-W25N02KV.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/891-v6.2-mtd-spinand-winbond-add-W25N02KV.patch | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/891-v6.2-mtd-spinand-winbond-add-W25N02KV.patch b/target/linux/generic/backport-5.15/891-v6.2-mtd-spinand-winbond-add-W25N02KV.patch new file mode 100644 index 0000000000..d75a1acc57 --- /dev/null +++ b/target/linux/generic/backport-5.15/891-v6.2-mtd-spinand-winbond-add-W25N02KV.patch @@ -0,0 +1,106 @@ +From 6154c7a583483d7b69f53bea868efdc369edd563 Mon Sep 17 00:00:00 2001 +From: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu> +Date: Mon, 10 Oct 2022 13:51:10 +0300 +Subject: [PATCH] mtd: spinand: winbond: add Winbond W25N02KV flash support + +Add support of Winbond W25N02KV flash + +Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu> +Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de> +Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> +Link: https://lore.kernel.org/linux-mtd/20221010105110.446674-2-mikhail.kshevetskiy@iopsys.eu +--- + drivers/mtd/nand/spi/winbond.c | 75 ++++++++++++++++++++++++++++++++++ + 1 file changed, 75 insertions(+) + +--- a/drivers/mtd/nand/spi/winbond.c ++++ b/drivers/mtd/nand/spi/winbond.c +@@ -74,6 +74,72 @@ static int w25m02gv_select_target(struct + 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 + &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) |