projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 229204da BB |
1 | /* |
| 2 | * Copyright (C) 2017 Free Electrons | |
| 3 | * Copyright (C) 2017 NextThing Co | |
| 4 | * | |
| 5 | * Author: Boris Brezillon <boris.brezillon@free-electrons.com> | |
| 6 | * | |
| 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. | |
| 11 | * | |
| 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. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/mtd/nand.h> | |
| 19 | ||
| 20 | static void amd_nand_decode_id(struct nand_chip *chip) | |
| 21 | { | |
| 22 | struct mtd_info *mtd = nand_to_mtd(chip); | |
| 23 | ||
| 24 | nand_decode_ext_id(chip); | |
| 25 | ||
| 26 | /* | |
| 27 | * Check for Spansion/AMD ID + repeating 5th, 6th byte since | |
| 28 | * some Spansion chips have erasesize that conflicts with size | |
| 29 | * listed in nand_ids table. | |
| 30 | * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39) | |
| 31 | */ | |
| 32 | if (chip->id.data[4] != 0x00 && chip->id.data[5] == 0x00 && | |
| 33 | chip->id.data[6] == 0x00 && chip->id.data[7] == 0x00 && | |
| 34 | mtd->writesize == 512) { | |
| 35 | mtd->erasesize = 128 * 1024; | |
| 36 | mtd->erasesize <<= ((chip->id.data[3] & 0x03) << 1); | |
| 37 | } | |
| 38 | } | |
| 39 | ||
| 40 | static int amd_nand_init(struct nand_chip *chip) | |
| 41 | { | |
| 42 | if (nand_is_slc(chip)) | |
| 43 | chip->bbt_options |= NAND_BBT_SCAN2NDPAGE; | |
| 44 | ||
| 45 | return 0; | |
| 46 | } | |
| 47 | ||
| 48 | const struct nand_manufacturer_ops amd_nand_manuf_ops = { | |
| 49 | .detect = amd_nand_decode_id, | |
| 50 | .init = amd_nand_init, | |
| 51 | }; |