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@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index ddb2670d97678ea1a53a8b6fc4a54f75f31d56c0..7c059822f47934536932e5016a45d0bb0ca649b8 100644 (file)
--- 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 d65db5921a0fcfe933fcbe44d57424dc9f564f57..36bca97900afb86661b67073880f02f53fdd506f 100644 (file)
--- 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 7dc06a807d002179cebbb61688afb66865078ccf..22ff89e9c47889f8fae950541c569c1105118925 100644 (file)
--- 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 (file)
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@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 74e3a231cb56ee813a8ed0dd79525e693038359d..dd9e3b5ddd4fd162776a544691f783940c1922e7 100644 (file)
--- 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;