From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Cercueil Subject: [PATCH 5/8] mtd: rawnand: jz4780: Add ooblayout for the JZ4725B Date: Thu, 17 Jan 2019 22:06:31 -0300 Message-ID: <20190118010634.27399-5-paul@crapouillou.net> References: <20190118010634.27399-1-paul@crapouillou.net> Return-path: In-Reply-To: <20190118010634.27399-1-paul@crapouillou.net> Sender: linux-kernel-owner@vger.kernel.org To: David Woodhouse , Brian Norris , Boris Brezillon , Marek Vasut , Richard Weinberger , Rob Herring , Mark Rutland , Ralf Baechle , Paul Burton , James Hogan , Miquel Raynal , Harvey Hunt Cc: linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Paul Cercueil List-Id: devicetree@vger.kernel.org The boot ROM of the JZ4725B SoC expects a specific OOB layout on the NAND, so it makes sense to use this OOB layout unconditionally on this SoC. Signed-off-by: Paul Cercueil --- drivers/mtd/nand/raw/jz4780_nand.c | 40 +++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/jz4780_nand.c b/drivers/mtd/nand/raw/jz4780_nand.c index cf24bf12884f..073b3da5c3f7 100644 --- a/drivers/mtd/nand/raw/jz4780_nand.c +++ b/drivers/mtd/nand/raw/jz4780_nand.c @@ -34,6 +34,7 @@ struct jz_soc_info { unsigned long data_offset; unsigned long addr_offset; unsigned long cmd_offset; + const struct mtd_ooblayout_ops *oob_layout; }; struct jz4780_nand_cs { @@ -208,7 +209,7 @@ static int jz4780_nand_attach_chip(struct nand_chip *chip) return -EINVAL; } - mtd_set_ooblayout(mtd, &nand_ooblayout_lp_ops); + mtd_set_ooblayout(mtd, nfc->soc_info->oob_layout); return 0; } @@ -398,16 +399,53 @@ static int jz4780_nand_remove(struct platform_device *pdev) return 0; } +static int jz4725b_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct nand_ecc_ctrl *ecc = &chip->ecc; + + if (section || !ecc->total) + return -ERANGE; + + oobregion->length = ecc->total; + oobregion->offset = 3; + + return 0; +} + +static int jz4725b_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct nand_ecc_ctrl *ecc = &chip->ecc; + + if (section) + return -ERANGE; + + oobregion->length = mtd->oobsize - ecc->total - 3; + oobregion->offset = 3 + ecc->total; + + return 0; +} + +const struct mtd_ooblayout_ops jz4725b_ooblayout_ops = { + .ecc = jz4725b_ooblayout_ecc, + .free = jz4725b_ooblayout_free, +}; + static const struct jz_soc_info jz4725b_soc_info = { .data_offset = 0x00000000, .cmd_offset = 0x00008000, .addr_offset = 0x00010000, + .oob_layout = &jz4725b_ooblayout_ops, }; static const struct jz_soc_info jz4780_soc_info = { .data_offset = 0x00000000, .cmd_offset = 0x00400000, .addr_offset = 0x00800000, + .oob_layout = &nand_ooblayout_lp_ops, }; static const struct of_device_id jz4780_nand_dt_match[] = { -- 2.11.0