[PATCH 11/15] mtd: nand: move AMD/Spansion specific initialization in nand_amd.c

[Boris Brezillon]

Moving AMD/Spansion specific initialization into nand_amd.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>
---
 drivers/mtd/nand/Makefile    |  1 +
 drivers/mtd/nand/nand_amd.c  | 60 ++++++++++++++++++++++++++++++++++++++++++++
 drivers/mtd/nand/nand_base.c | 19 +-------------
 drivers/mtd/nand/nand_ids.c  |  3 ++-
 4 files changed, 64 insertions(+), 19 deletions(-)
 create mode 100644 drivers/mtd/nand/nand_amd.c

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index f1bd008..19d0cb8 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -58,6 +58,7 @@ obj-$(CONFIG_MTD_NAND_BRCMNAND)		+= brcmnand/
 obj-$(CONFIG_MTD_NAND_QCOM)		+= qcom_nandc.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 0000000..8bb69aa
--- /dev/null
+++ b/drivers/mtd/nand/nand_amd.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2013 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 int amd_nand_decode_id(struct nand_chip *chip)
+{
+	struct mtd_info *mtd = nand_to_mtd(chip);
+
+	/*
+	 * The NAND is compatible with the JEDEC or ONFI standard, we already
+	 * have all the information we could retrieve from the NAND ID.
+	 */
+	if (chip->onfi_version || chip->jedec_version)
+		return 0;
+
+	/*
+	 * 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);
+	}
+
+	return 0;
+}
+
+static int amd_nand_init(struct nand_chip *chip)
+{
+	int ret;
+
+	ret = amd_nand_decode_id(chip);
+	if (ret)
+		return ret;
+
+	if (nand_is_slc(chip))
+		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+
+	return 0;
+}
+
+const struct nand_manufacturer_ops amd_nand_manuf_ops = {
+	.init = amd_nand_init,
+};
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 662d4c5..cde99b0 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -3585,8 +3585,6 @@ static void nand_decode_ext_id(struct nand_chip *chip)
 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;
@@ -3594,19 +3592,6 @@ 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);
-	}
 }
 
 /*
@@ -3632,9 +3617,7 @@ 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 5d02787..299b2b1 100644
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -170,6 +170,7 @@ 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;
 
 struct nand_manufacturers nand_manuf_ids[] = {
 	{NAND_MFR_TOSHIBA, "Toshiba", &toshiba_nand_manuf_ops},
@@ -180,7 +181,7 @@ struct nand_manufacturers nand_manuf_ids[] = {
 	{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"},
-- 
2.7.4