lkml.org 
[lkml]   [2019]   [Jan]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 5/8] mtd: rawnand: jz4780: Add ooblayout for the JZ4725B
Date
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 <paul@crapouillou.net>
---
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
\
 
 \ /
  Last update: 2019-01-18 02:08    [W:0.093 / U:1.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site