提交 c51d0ac5 编写于 作者: B Boris Brezillon

mtd: nand: Move Samsung specific init/detection logic in nand_samsung.c

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: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NRichard Weinberger <richard@nod.at>
上级 abbe26d1
......@@ -61,3 +61,4 @@ 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_samsung.o
......@@ -3832,48 +3832,13 @@ 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 && id_data[0] == NAND_MFR_SAMSUNG &&
!nand_is_slc(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 && id_data[0] == NAND_MFR_HYNIX &&
!nand_is_slc(chip)) {
if (id_len == 6 && id_data[0] == NAND_MFR_HYNIX &&
!nand_is_slc(chip)) {
unsigned int tmp;
/* Calc pagesize */
......@@ -4001,13 +3966,10 @@ 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_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)) ||
......@@ -4202,12 +4164,6 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
/* 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) {
......
......@@ -10,7 +10,7 @@
#include <linux/mtd/nand.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
......@@ -172,7 +172,7 @@ struct nand_flash_dev nand_flash_ids[] = {
static const struct nand_manufacturer nand_manufacturers[] = {
{NAND_MFR_TOSHIBA, "Toshiba"},
{NAND_MFR_ESMT, "ESMT"},
{NAND_MFR_SAMSUNG, "Samsung"},
{NAND_MFR_SAMSUNG, "Samsung", &samsung_nand_manuf_ops},
{NAND_MFR_FUJITSU, "Fujitsu"},
{NAND_MFR_NATIONAL, "National"},
{NAND_MFR_RENESAS, "Renesas"},
......
/*
* 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 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;
default:
/*
* We should never reach this case, but if that
* happens, this probably means Samsung decided to use
* a different extended ID format, and we should find
* a way to support it.
*/
WARN(1, "Invalid OOB size value");
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,
};
......@@ -1114,6 +1114,8 @@ nand_manufacturer_name(const struct nand_manufacturer *manufacturer)
extern struct nand_flash_dev nand_flash_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);
......
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