From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/mtd/nand/raw/nand_amd.c | 53 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/mtd/nand/raw/nand_amd.c (limited to 'drivers/mtd/nand/raw/nand_amd.c') diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c new file mode 100644 index 000000000..c3d4dae3c --- /dev/null +++ b/drivers/mtd/nand/raw/nand_amd.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2017 Free Electrons + * Copyright (C) 2017 NextThing Co + * + * Author: Boris Brezillon + */ + +#include "internals.h" + +static void amd_nand_decode_id(struct nand_chip *chip) +{ + struct mtd_info *mtd = nand_to_mtd(chip); + struct nand_memory_organization *memorg; + + memorg = nanddev_get_memorg(&chip->base); + + nand_decode_ext_id(chip); + + /* + * Check for Spansion/AMD ID + repeating 5th, 6th byte since + * some Spansion chips have erasesize that conflicts with size + * listed in nand_ids table. + * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39) + */ + if (chip->id.data[4] != 0x00 && chip->id.data[5] == 0x00 && + chip->id.data[6] == 0x00 && chip->id.data[7] == 0x00 && + memorg->pagesize == 512) { + memorg->pages_per_eraseblock = 256; + memorg->pages_per_eraseblock <<= ((chip->id.data[3] & 0x03) << 1); + mtd->erasesize = memorg->pages_per_eraseblock * + memorg->pagesize; + } +} + +static int amd_nand_init(struct nand_chip *chip) +{ + if (nand_is_slc(chip)) + /* + * According to the datasheet of some Cypress SLC NANDs, + * the bad block markers can be in the first, second or last + * page of a block. So let's check all three locations. + */ + chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE | + NAND_BBM_LASTPAGE; + + return 0; +} + +const struct nand_manufacturer_ops amd_nand_manuf_ops = { + .detect = amd_nand_decode_id, + .init = amd_nand_init, +}; -- cgit v1.2.3