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// SPDX-License-Identifier: GPL-2.0+
/*
* 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/rawnand.h>
static void hynix_nand_decode_id(struct nand_chip *chip)
{
struct mtd_info *mtd = nand_to_mtd(chip);
/* Hynix MLC (6 byte ID): Hynix H27UBG8T2B (p.22) */
if (chip->id.len == 6 && !nand_is_slc(chip)) {
u8 tmp, extid = chip->id.data[3];
/* Extract pagesize */
mtd->writesize = 2048 << (extid & 0x03);
extid >>= 2;
/* Extract oobsize */
switch (((extid >> 2) & 0x4) | (extid & 0x3)) {
case 0:
mtd->oobsize = 128;
break;
case 1:
mtd->oobsize = 224;
break;
case 2:
mtd->oobsize = 448;
break;
case 3:
mtd->oobsize = 64;
break;
case 4:
mtd->oobsize = 32;
break;
case 5:
mtd->oobsize = 16;
break;
default:
mtd->oobsize = 640;
break;
}
/* Extract blocksize */
extid >>= 2;
tmp = ((extid >> 1) & 0x04) | (extid & 0x03);
if (tmp < 0x03)
mtd->erasesize = (128 * 1024) << tmp;
else if (tmp == 0x03)
mtd->erasesize = 768 * 1024;
else
mtd->erasesize = (64 * 1024) << tmp;
} else {
nand_decode_ext_id(chip);
}
}
static int hynix_nand_init(struct nand_chip *chip)
{
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 hynix_nand_manuf_ops = {
.detect = hynix_nand_decode_id,
.init = hynix_nand_init,
};
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