lkml.org 
[lkml]   [2017]   [Jan]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v6 13/17] mtd: nand: Move AMD/Spansion specific init/detection logic in nand_amd.c
Date
Moving AMD/Spansion specific initialization/detection into nand_amd.c.
This is part of the "separate vendor specific code from core" cleanup
process.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
---
drivers/mtd/nand/Makefile | 1 +
drivers/mtd/nand/nand_amd.c | 51 ++++++++++++++++++++++++++++++++++++++++++++
drivers/mtd/nand/nand_base.c | 18 +---------------
drivers/mtd/nand/nand_ids.c | 2 +-
include/linux/mtd/nand.h | 1 +
5 files changed, 55 insertions(+), 18 deletions(-)
create mode 100644 drivers/mtd/nand/nand_amd.c

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 11d743155810..f48ddcc132bc 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o
obj-$(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_amd.o
nand-objs += nand_hynix.o
nand-objs += nand_micron.o
nand-objs += nand_samsung.o
diff --git a/drivers/mtd/nand/nand_amd.c b/drivers/mtd/nand/nand_amd.c
new file mode 100644
index 000000000000..170403a3bfa8
--- /dev/null
+++ b/drivers/mtd/nand/nand_amd.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2017 Free Electrons
+ * Copyright (C) 2017 NextThing Co
+ *
+ * Author: Boris Brezillon <boris.brezillon@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 amd_nand_decode_id(struct nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+
+ nand_decode_ext_id(chip);
+
+ /*
+ * Check for Spansion/AMD ID + repeating 5th, 6th byte since
+ * some Spansion chips have erasesize that conflicts with size
+ * listed in nand_ids table.
+ * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39)
+ */
+ if (chip->id.data[4] != 0x00 && chip->id.data[5] == 0x00 &&
+ chip->id.data[6] == 0x00 && chip->id.data[7] == 0x00 &&
+ mtd->writesize == 512) {
+ mtd->erasesize = 128 * 1024;
+ mtd->erasesize <<= ((chip->id.data[3] & 0x03) << 1);
+ }
+}
+
+static int amd_nand_init(struct nand_chip *chip)
+{
+ if (nand_is_slc(chip))
+ chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+
+ return 0;
+}
+
+const struct nand_manufacturer_ops amd_nand_manuf_ops = {
+ .detect = amd_nand_decode_id,
+ .init = amd_nand_init,
+};
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index fe05191c952a..e8f92047059d 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3785,8 +3785,6 @@ EXPORT_SYMBOL_GPL(nand_decode_ext_id);
static void nand_decode_id(struct nand_chip *chip, struct nand_flash_dev *type)
{
struct mtd_info *mtd = nand_to_mtd(chip);
- u8 *id_data = chip->id.data;
- int maf_id = id_data[0];

mtd->erasesize = type->erasesize;
mtd->writesize = type->pagesize;
@@ -3794,19 +3792,6 @@ static void nand_decode_id(struct nand_chip *chip, struct nand_flash_dev *type)

/* All legacy ID NAND are small-page, SLC */
chip->bits_per_cell = 1;
-
- /*
- * Check for Spansion/AMD ID + repeating 5th, 6th byte since
- * some Spansion chips have erasesize that conflicts with size
- * listed in nand_ids table.
- * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39)
- */
- if (maf_id == NAND_MFR_AMD && id_data[4] != 0x00 && id_data[5] == 0x00
- && id_data[6] == 0x00 && id_data[7] == 0x00
- && mtd->writesize == 512) {
- mtd->erasesize = 128 * 1024;
- mtd->erasesize <<= ((id_data[3] & 0x03) << 1);
- }
}

/*
@@ -3832,8 +3817,7 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
* Micron devices with 2KiB pages and on SLC Samsung, Hynix, Toshiba,
* AMD/Spansion, and Macronix. All others scan only the first page.
*/
- if (nand_is_slc(chip) &&
- (maf_id == NAND_MFR_AMD || maf_id == NAND_MFR_MACRONIX))
+ if (nand_is_slc(chip) && maf_id == NAND_MFR_MACRONIX)
chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
}

diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
index 7dd339c15d3e..d0914f356e1d 100644
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -179,7 +179,7 @@ static const struct nand_manufacturer nand_manufacturers[] = {
{NAND_MFR_STMICRO, "ST Micro"},
{NAND_MFR_HYNIX, "Hynix", &hynix_nand_manuf_ops},
{NAND_MFR_MICRON, "Micron", &micron_nand_manuf_ops},
- {NAND_MFR_AMD, "AMD/Spansion"},
+ {NAND_MFR_AMD, "AMD/Spansion", &amd_nand_manuf_ops},
{NAND_MFR_MACRONIX, "Macronix"},
{NAND_MFR_EON, "Eon"},
{NAND_MFR_SANDISK, "SanDisk"},
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 545d562390c2..2fae29699eef 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -1091,6 +1091,7 @@ 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;
extern const struct nand_manufacturer_ops micron_nand_manuf_ops;
+extern const struct nand_manufacturer_ops amd_nand_manuf_ops;

int nand_default_bbt(struct mtd_info *mtd);
int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
--
2.7.4
\
 
 \ /
  Last update: 2017-01-09 13:55    [W:0.117 / U:9.836 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site