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/*
* 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,
};
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