2 * Copyright (C) 2017 Free Electrons
3 * Copyright (C) 2017 NextThing Co
5 * Author: Boris Brezillon <boris.brezillon@free-electrons.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 #include "internals.h"
20 static void amd_nand_decode_id(struct nand_chip *chip)
22 struct mtd_info *mtd = nand_to_mtd(chip);
23 struct nand_memory_organization *memorg;
25 memorg = nanddev_get_memorg(&chip->base);
27 nand_decode_ext_id(chip);
30 * Check for Spansion/AMD ID + repeating 5th, 6th byte since
31 * some Spansion chips have erasesize that conflicts with size
32 * listed in nand_ids table.
33 * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39)
35 if (chip->id.data[4] != 0x00 && chip->id.data[5] == 0x00 &&
36 chip->id.data[6] == 0x00 && chip->id.data[7] == 0x00 &&
37 memorg->pagesize == 512) {
38 memorg->pages_per_eraseblock = 256;
39 memorg->pages_per_eraseblock <<= ((chip->id.data[3] & 0x03) << 1);
40 mtd->erasesize = memorg->pages_per_eraseblock *
45 static int amd_nand_init(struct nand_chip *chip)
47 if (nand_is_slc(chip))
48 chip->options |= NAND_BBM_SECONDPAGE;
53 const struct nand_manufacturer_ops amd_nand_manuf_ops = {
54 .detect = amd_nand_decode_id,
55 .init = amd_nand_init,