[PATCH v4 07/14] mtd: nand: Move Samsung specific init/detection logic in nand_samsung.c
Dario Binacchi
dario.binacchi at amarulasolutions.com
Fri Jul 22 18:10:01 CEST 2022
From: Michael Trimarchi <michael at amarulasolutions.com>
Upstream linux commit c51d0ac59f2420.
Move Samsung specific initialization and detection logic into
nand_samsung.c. This is part of the "separate vendor specific code from
core" cleanup process.
Signed-off-by: Michael Trimarchi <michael at amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi at amarulasolutions.com>
---
(no changes since v3)
Changes in v3:
- Use commit sha1 with 13 digits.
- Fix code style warnings raised by patman.
- Add the SPDX-License-Identifier tag.
Changes in v2:
- Use short-commit form.
- Remove linux info. Uboot seems that backport without add this
extra information.
- Adjust the include file in nand_samsung.
drivers/mtd/nand/raw/Makefile | 3 +-
drivers/mtd/nand/raw/nand_base.c | 52 ++---------------
drivers/mtd/nand/raw/nand_ids.c | 4 +-
drivers/mtd/nand/raw/nand_samsung.c | 90 +++++++++++++++++++++++++++++
include/linux/mtd/rawnand.h | 2 +
5 files changed, 100 insertions(+), 51 deletions(-)
create mode 100644 drivers/mtd/nand/raw/nand_samsung.c
diff --git a/drivers/mtd/nand/raw/Makefile b/drivers/mtd/nand/raw/Makefile
index f278f31f5cd5..440290bed0fe 100644
--- a/drivers/mtd/nand/raw/Makefile
+++ b/drivers/mtd/nand/raw/Makefile
@@ -14,7 +14,7 @@ obj-$(CONFIG_SPL_NAND_DENALI) += denali_spl.o
obj-$(CONFIG_SPL_NAND_SIMPLE) += nand_spl_simple.o
obj-$(CONFIG_SPL_NAND_LOAD) += nand_spl_load.o
obj-$(CONFIG_SPL_NAND_ECC) += nand_ecc.o
-obj-$(CONFIG_SPL_NAND_BASE) += nand_base.o
+obj-$(CONFIG_SPL_NAND_BASE) += nand_base.o nand_samsung.o
obj-$(CONFIG_SPL_NAND_IDENT) += nand_ids.o nand_timings.o
obj-$(CONFIG_TPL_NAND_INIT) += nand.o
ifeq ($(CONFIG_SPL_ENV_SUPPORT),y)
@@ -31,6 +31,7 @@ obj-y += nand_ids.o
obj-y += nand_util.o
obj-y += nand_ecc.o
obj-y += nand_base.o
+obj-y += nand_samsung.o
obj-y += nand_timings.o
endif # not spl
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 174c760f3416..fe59157bc3c4 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4173,48 +4173,13 @@ void nand_decode_ext_id(struct nand_chip *chip)
/*
* Field definitions are in the following datasheets:
* Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32)
- * New Samsung (6 byte ID): Samsung K9GAG08U0F (p.44)
* Hynix MLC (6 byte ID): Hynix H27UBG8T2B (p.22)
*
* Check for ID length, non-zero 6th byte, cell type, and Hynix/Samsung
* ID to decide what to do.
*/
- if (id_len == 6 && chip->id.data[0] == NAND_MFR_SAMSUNG &&
- !nand_is_slc(chip) && chip->id.data[5] != 0x00) {
- /* Calc pagesize */
- mtd->writesize = 2048 << (extid & 0x03);
- extid >>= 2;
- /* Calc oobsize */
- switch (((extid >> 2) & 0x04) | (extid & 0x03)) {
- case 1:
- mtd->oobsize = 128;
- break;
- case 2:
- mtd->oobsize = 218;
- break;
- case 3:
- mtd->oobsize = 400;
- break;
- case 4:
- mtd->oobsize = 436;
- break;
- case 5:
- mtd->oobsize = 512;
- break;
- case 6:
- mtd->oobsize = 640;
- break;
- case 7:
- default: /* Other cases are "reserved" (unknown) */
- mtd->oobsize = 1024;
- break;
- }
- extid >>= 2;
- /* Calc blocksize */
- mtd->erasesize = (128 * 1024) <<
- (((extid >> 1) & 0x04) | (extid & 0x03));
- } else if (id_len == 6 && chip->id.data[0] == NAND_MFR_HYNIX &&
- !nand_is_slc(chip)) {
+ if (id_len == 6 && chip->id.data[0] == NAND_MFR_HYNIX &&
+ !nand_is_slc(chip)) {
unsigned int tmp;
/* Calc pagesize */
@@ -4374,13 +4339,10 @@ static void nand_decode_bbm_options(struct mtd_info *mtd,
* 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_SAMSUNG ||
- maf_id == NAND_MFR_HYNIX))
+ if (!nand_is_slc(chip) && maf_id == NAND_MFR_HYNIX)
chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
else if ((nand_is_slc(chip) &&
- (maf_id == NAND_MFR_SAMSUNG ||
- maf_id == NAND_MFR_HYNIX ||
+ (maf_id == NAND_MFR_HYNIX ||
maf_id == NAND_MFR_TOSHIBA ||
maf_id == NAND_MFR_AMD ||
maf_id == NAND_MFR_MACRONIX)) ||
@@ -4549,12 +4511,6 @@ struct nand_flash_dev *nand_get_flash_type(struct nand_chip *chip, int *maf_id,
/* Get chip options */
chip->options |= type->options;
- /*
- * Check if chip is not a Samsung device. Do not clear the
- * options for chips which do not have an extended id.
- */
- if (*maf_id != NAND_MFR_SAMSUNG && !type->pagesize)
- chip->options &= ~NAND_SAMSUNG_LP_OPTIONS;
ident_done:
if (chip->options & NAND_BUSWIDTH_AUTO) {
diff --git a/drivers/mtd/nand/raw/nand_ids.c b/drivers/mtd/nand/raw/nand_ids.c
index 2a50f0b2144c..f4126c3a5a13 100644
--- a/drivers/mtd/nand/raw/nand_ids.c
+++ b/drivers/mtd/nand/raw/nand_ids.c
@@ -10,7 +10,7 @@
#include <linux/mtd/rawnand.h>
#include <linux/sizes.h>
-#define LP_OPTIONS NAND_SAMSUNG_LP_OPTIONS
+#define LP_OPTIONS 0
#define LP_OPTIONS16 (LP_OPTIONS | NAND_BUSWIDTH_16)
#define SP_OPTIONS NAND_NEED_READRDY
@@ -189,7 +189,7 @@ struct nand_flash_dev nand_flash_ids[] = {
/* Manufacturer IDs */
struct nand_manufacturers nand_manuf_ids[] = {
{NAND_MFR_TOSHIBA, "Toshiba"},
- {NAND_MFR_SAMSUNG, "Samsung"},
+ {NAND_MFR_SAMSUNG, "Samsung", &samsung_nand_manuf_ops},
{NAND_MFR_FUJITSU, "Fujitsu"},
{NAND_MFR_NATIONAL, "National"},
{NAND_MFR_RENESAS, "Renesas"},
diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
new file mode 100644
index 000000000000..0ab80621936f
--- /dev/null
+++ b/drivers/mtd/nand/raw/nand_samsung.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * 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/bug.h>
+#include <linux/mtd/rawnand.h>
+
+static void samsung_nand_decode_id(struct nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+
+ /* New Samsung (6 byte ID): Samsung K9GAG08U0F (p.44) */
+ if (chip->id.len == 6 && !nand_is_slc(chip) &&
+ chip->id.data[5] != 0x00) {
+ u8 extid = chip->id.data[3];
+
+ /* Get pagesize */
+ mtd->writesize = 2048 << (extid & 0x03);
+
+ extid >>= 2;
+
+ /* Get oobsize */
+ switch (((extid >> 2) & 0x4) | (extid & 0x3)) {
+ case 1:
+ mtd->oobsize = 128;
+ break;
+ case 2:
+ mtd->oobsize = 218;
+ break;
+ case 3:
+ mtd->oobsize = 400;
+ break;
+ case 4:
+ mtd->oobsize = 436;
+ break;
+ case 5:
+ mtd->oobsize = 512;
+ break;
+ case 6:
+ mtd->oobsize = 640;
+ break;
+ case 7:
+ default: /* Other cases are "reserved" (unknown) */
+ WARN(1, "Invalid OOB size value");
+ mtd->oobsize = 1024;
+ break;
+ }
+
+ /* Get blocksize */
+ extid >>= 2;
+ mtd->erasesize = (128 * 1024) <<
+ (((extid >> 1) & 0x04) | (extid & 0x03));
+ } else {
+ nand_decode_ext_id(chip);
+ }
+}
+
+static int samsung_nand_init(struct nand_chip *chip)
+{
+ struct mtd_info *mtd = nand_to_mtd(chip);
+
+ if (mtd->writesize > 512)
+ chip->options |= NAND_SAMSUNG_LP_OPTIONS;
+
+ if (!nand_is_slc(chip))
+ chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
+ else
+ chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+
+ return 0;
+}
+
+const struct nand_manufacturer_ops samsung_nand_manuf_ops = {
+ .detect = samsung_nand_decode_id,
+ .init = samsung_nand_init,
+};
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 8fb2a43296f5..d0312e924b4d 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -1158,6 +1158,8 @@ struct nand_manufacturers {
extern struct nand_flash_dev nand_flash_ids[];
extern struct nand_manufacturers nand_manuf_ids[];
+extern const struct nand_manufacturer_ops samsung_nand_manuf_ops;
+
int nand_default_bbt(struct mtd_info *mtd);
int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs);
--
2.32.0
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