mtd: nand: Move Toshiba specific init/detection logic in nand_toshiba.c
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linux-mtd at lists.infradead.org
Wed May 10 19:59:04 PDT 2017
Gitweb: http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=9b2d61f80b060ce3ea5af2a99e148b0b214932b2
Commit: 9b2d61f80b060ce3ea5af2a99e148b0b214932b2
Parent: 01389b6bd2f4f7649cdbb4a99a15d9e0c05d6f8c
Author: Boris Brezillon <boris.brezillon at free-electrons.com>
AuthorDate: Wed Jun 8 10:34:57 2016 +0200
Committer: Boris Brezillon <boris.brezillon at free-electrons.com>
CommitDate: Wed Mar 8 23:21:21 2017 +0100
mtd: nand: Move Toshiba specific init/detection logic in nand_toshiba.c
Move Toshiba specific initialization and detection logic into
nand_toshiba.c. This is part of the "separate vendor specific code from
core" cleanup process.
Signed-off-by: Boris Brezillon <boris.brezillon at free-electrons.com>
Acked-by: Richard Weinberger <richard at nod.at>
---
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/nand_base.c | 19 ++-------------
drivers/mtd/nand/nand_ids.c | 2 +-
drivers/mtd/nand/nand_toshiba.c | 51 +++++++++++++++++++++++++++++++++++++++++
include/linux/mtd/nand.h | 1 +
5 files changed, 56 insertions(+), 18 deletions(-)
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index ddb2670..7c05982 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -63,3 +63,4 @@ obj-$(CONFIG_MTD_NAND_MTK) += mtk_nand.o mtk_ecc.o
nand-objs := nand_base.o nand_bbt.o nand_timings.o nand_ids.o
nand-objs += nand_hynix.o
nand-objs += nand_samsung.o
+nand-objs += nand_toshiba.o
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d65db59..36bca97 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3822,7 +3822,7 @@ static int nand_get_bits_per_cell(u8 cellinfo)
void nand_decode_ext_id(struct nand_chip *chip)
{
struct mtd_info *mtd = nand_to_mtd(chip);
- int extid, id_len = chip->id.len;
+ int extid;
u8 *id_data = chip->id.data;
/* The 3rd id byte holds MLC / multichip data */
chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]);
@@ -3841,20 +3841,6 @@ void nand_decode_ext_id(struct nand_chip *chip)
/* Get buswidth information */
if (extid & 0x1)
chip->options |= NAND_BUSWIDTH_16;
-
- /*
- * Toshiba 24nm raw SLC (i.e., not BENAND) have 32B OOB per
- * 512B page. For Toshiba SLC, we decode the 5th/6th byte as
- * follows:
- * - ID byte 6, bits[2:0]: 100b -> 43nm, 101b -> 32nm,
- * 110b -> 24nm
- * - ID byte 5, bit[7]: 1 -> BENAND, 0 -> raw SLC
- */
- if (id_len >= 6 && id_data[0] == NAND_MFR_TOSHIBA &&
- nand_is_slc(chip) &&
- (id_data[5] & 0x7) == 0x6 /* 24nm */ &&
- !(id_data[4] & 0x80) /* !BENAND */)
- mtd->oobsize = 32 * mtd->writesize >> 9;
}
EXPORT_SYMBOL_GPL(nand_decode_ext_id);
@@ -3914,8 +3900,7 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
* AMD/Spansion, and Macronix. All others scan only the first page.
*/
if ((nand_is_slc(chip) &&
- (maf_id == NAND_MFR_TOSHIBA || maf_id == NAND_MFR_AMD ||
- maf_id == NAND_MFR_MACRONIX)) ||
+ (maf_id == NAND_MFR_AMD || maf_id == NAND_MFR_MACRONIX)) ||
(mtd->writesize == 2048 && maf_id == NAND_MFR_MICRON))
chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
}
diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
index 7dc06a8..22ff89e 100644
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -170,7 +170,7 @@ struct nand_flash_dev nand_flash_ids[] = {
/* Manufacturer IDs */
static const struct nand_manufacturer nand_manufacturers[] = {
- {NAND_MFR_TOSHIBA, "Toshiba"},
+ {NAND_MFR_TOSHIBA, "Toshiba", &toshiba_nand_manuf_ops},
{NAND_MFR_ESMT, "ESMT"},
{NAND_MFR_SAMSUNG, "Samsung", &samsung_nand_manuf_ops},
{NAND_MFR_FUJITSU, "Fujitsu"},
diff --git a/drivers/mtd/nand/nand_toshiba.c b/drivers/mtd/nand/nand_toshiba.c
new file mode 100644
index 0000000..fa787ba
--- /dev/null
+++ b/drivers/mtd/nand/nand_toshiba.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2017 Free Electrons
+ * Copyright (C) 2017 NextThing Co
+ *
+ * Author: Boris Brezillon <boris.brezillon at free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/mtd/nand.h>
+
+static void toshiba_nand_decode_id(struct nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+
+ nand_decode_ext_id(chip);
+
+ /*
+ * Toshiba 24nm raw SLC (i.e., not BENAND) have 32B OOB per
+ * 512B page. For Toshiba SLC, we decode the 5th/6th byte as
+ * follows:
+ * - ID byte 6, bits[2:0]: 100b -> 43nm, 101b -> 32nm,
+ * 110b -> 24nm
+ * - ID byte 5, bit[7]: 1 -> BENAND, 0 -> raw SLC
+ */
+ if (chip->id.len >= 6 && nand_is_slc(chip) &&
+ (chip->id.data[5] & 0x7) == 0x6 /* 24nm */ &&
+ !(chip->id.data[4] & 0x80) /* !BENAND */)
+ mtd->oobsize = 32 * mtd->writesize >> 9;
+}
+
+static int toshiba_nand_init(struct nand_chip *chip)
+{
+ if (nand_is_slc(chip))
+ chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+
+ return 0;
+}
+
+const struct nand_manufacturer_ops toshiba_nand_manuf_ops = {
+ .detect = toshiba_nand_decode_id,
+ .init = toshiba_nand_init,
+};
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 74e3a23..dd9e3b5 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -1114,6 +1114,7 @@ nand_manufacturer_name(const struct nand_manufacturer *manufacturer)
extern struct nand_flash_dev nand_flash_ids[];
+extern const struct nand_manufacturer_ops toshiba_nand_manuf_ops;
extern const struct nand_manufacturer_ops samsung_nand_manuf_ops;
extern const struct nand_manufacturer_ops hynix_nand_manuf_ops;
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