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59 lines
1.4 KiB
59 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2018 Toradex AG |
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* |
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* Author: Marcel Ziswiler <[email protected]> |
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*/ |
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#include <linux/mtd/rawnand.h> |
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#include "internals.h" |
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static void esmt_nand_decode_id(struct nand_chip *chip) |
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{ |
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struct nand_device *base = &chip->base; |
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struct nand_ecc_props requirements = {}; |
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nand_decode_ext_id(chip); |
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/* Extract ECC requirements from 5th id byte. */ |
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if (chip->id.len >= 5 && nand_is_slc(chip)) { |
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requirements.step_size = 512; |
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switch (chip->id.data[4] & 0x3) { |
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case 0x0: |
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requirements.strength = 4; |
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break; |
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case 0x1: |
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requirements.strength = 2; |
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break; |
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case 0x2: |
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requirements.strength = 1; |
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break; |
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default: |
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WARN(1, "Could not get ECC info"); |
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requirements.step_size = 0; |
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break; |
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} |
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} |
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nanddev_set_ecc_requirements(base, &requirements); |
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} |
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static int esmt_nand_init(struct nand_chip *chip) |
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{ |
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if (nand_is_slc(chip)) |
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/* |
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* It is known that some ESMT SLC NANDs have been shipped |
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* with the factory bad block markers in the first or last page |
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* of the block, instead of the first or second page. To be on |
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* the safe side, let's check all three locations. |
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*/ |
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chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE | |
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NAND_BBM_LASTPAGE; |
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return 0; |
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} |
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const struct nand_manufacturer_ops esmt_nand_manuf_ops = { |
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.detect = esmt_nand_decode_id, |
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.init = esmt_nand_init, |
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};
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