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Thu, 27 Nov 2025 11:59:32 -0800 (PST) Received: from OpenwrtBuild.lan ([178.207.14.215]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-37d24102440sm5610761fa.41.2025.11.27.11.59.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Nov 2025 11:59:32 -0800 (PST) From: Mikhail Zhilkin To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Mark Brown Cc: Mikhail Zhilkin , linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org Subject: [PATCH v2] mtd: spinand: add support for FudanMicro FM25S01BI3 Date: Thu, 27 Nov 2025 22:59:00 +0300 Message-Id: <20251127195900.2562-1-csharper2005@gmail.com> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for FudanMicro FM25S01BI3 SPI NAND. Link: https://www.fmsh.com/nvm/FM25S01BI3_ds_eng.pdf Signed-off-by: Mikhail Zhilkin --- Changes in v2: - Rebase with nand/next --- drivers/mtd/nand/spi/fmsh.c | 72 +++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) diff --git a/drivers/mtd/nand/spi/fmsh.c b/drivers/mtd/nand/spi/fmsh.c index 8b2097bfc771..43689b91dc28 100644 --- a/drivers/mtd/nand/spi/fmsh.c +++ b/drivers/mtd/nand/spi/fmsh.c @@ -9,6 +9,13 @@ #include #include =20 +#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 =20 static SPINAND_OP_VARIANTS(read_cache_variants, @@ -45,11 +52,66 @@ static int fm25s01a_ooblayout_free(struct mtd_info *mtd= , int section, return 0; } =20 +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 =3D 64; + region->length =3D 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 =3D (16 * section) + 4; + region->length =3D 12; + + return 0; +} + static const struct mtd_ooblayout_ops fm25s01a_ooblayout =3D { .ecc =3D fm25s01a_ooblayout_ecc, .free =3D fm25s01a_ooblayout_free, }; =20 +static const struct mtd_ooblayout_ops fm25s01bi3_ooblayout =3D { + .ecc =3D fm25s01bi3_ooblayout_ecc, + .free =3D fm25s01bi3_ooblayout_free, +}; + static const struct spinand_info fmsh_spinand_table[] =3D { SPINAND_INFO("FM25S01A", SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xE4), @@ -60,6 +122,16 @@ static const struct spinand_info fmsh_spinand_table[] = =3D { &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)), }; =20 static const struct spinand_manufacturer_ops fmsh_spinand_manuf_ops =3D { --=20 2.40.1