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 <linux/mtd/nand.h>
20 static void hynix_nand_decode_id(struct nand_chip *chip)
22 struct mtd_info *mtd = nand_to_mtd(chip);
24 /* Hynix MLC (6 byte ID): Hynix H27UBG8T2B (p.22) */
25 if (chip->id.len == 6 && !nand_is_slc(chip)) {
26 u8 tmp, extid = chip->id.data[3];
28 /* Extract pagesize */
29 mtd->writesize = 2048 << (extid & 0x03);
33 switch (((extid >> 2) & 0x4) | (extid & 0x3)) {
57 /* Extract blocksize */
59 tmp = ((extid >> 1) & 0x04) | (extid & 0x03);
61 mtd->erasesize = (128 * 1024) << tmp;
63 mtd->erasesize = 768 * 1024;
65 mtd->erasesize = (64 * 1024) << tmp;
67 nand_decode_ext_id(chip);
71 static int hynix_nand_init(struct nand_chip *chip)
73 if (!nand_is_slc(chip))
74 chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
76 chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
81 const struct nand_manufacturer_ops hynix_nand_manuf_ops = {
82 .detect = hynix_nand_decode_id,
83 .init = hynix_nand_init,