2016-06-08 16:34:57 +08:00
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*/
|
|
|
|
|
2017-08-04 23:29:10 +08:00
|
|
|
#include <linux/mtd/rawnand.h>
|
2016-06-08 16:34:57 +08:00
|
|
|
|
|
|
|
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,
|
|
|
|
};
|