111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2017 Free Electrons
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* Copyright (C) 2017 NextThing Co
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*
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* Author: Boris Brezillon <boris.brezillon@free-electrons.com>
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*/
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#include "internals.h"
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#define MACRONIX_READ_RETRY_BIT BIT(0)
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#define MACRONIX_NUM_READ_RETRY_MODES 6
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struct nand_onfi_vendor_macronix {
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u8 reserved;
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u8 reliability_func;
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} __packed;
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static int macronix_nand_setup_read_retry(struct nand_chip *chip, int mode)
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{
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u8 feature[ONFI_SUBFEATURE_PARAM_LEN];
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if (!chip->parameters.supports_set_get_features ||
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!test_bit(ONFI_FEATURE_ADDR_READ_RETRY,
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chip->parameters.set_feature_list))
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return -ENOTSUPP;
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feature[0] = mode;
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return nand_set_features(chip, ONFI_FEATURE_ADDR_READ_RETRY, feature);
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}
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static void macronix_nand_onfi_init(struct nand_chip *chip)
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{
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struct nand_parameters *p = &chip->parameters;
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struct nand_onfi_vendor_macronix *mxic;
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if (!p->onfi)
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return;
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mxic = (struct nand_onfi_vendor_macronix *)p->onfi->vendor;
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if ((mxic->reliability_func & MACRONIX_READ_RETRY_BIT) == 0)
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return;
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chip->read_retries = MACRONIX_NUM_READ_RETRY_MODES;
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chip->setup_read_retry = macronix_nand_setup_read_retry;
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if (p->supports_set_get_features) {
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bitmap_set(p->set_feature_list,
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ONFI_FEATURE_ADDR_READ_RETRY, 1);
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bitmap_set(p->get_feature_list,
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ONFI_FEATURE_ADDR_READ_RETRY, 1);
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}
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}
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/*
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* Macronix AC series does not support using SET/GET_FEATURES to change
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* the timings unlike what is declared in the parameter page. Unflag
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* this feature to avoid unnecessary downturns.
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*/
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static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
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{
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unsigned int i;
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static const char * const broken_get_timings[] = {
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"MX30LF1G18AC",
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"MX30LF1G28AC",
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"MX30LF2G18AC",
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"MX30LF2G28AC",
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"MX30LF4G18AC",
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"MX30LF4G28AC",
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"MX60LF8G18AC",
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"MX30UF1G18AC",
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"MX30UF1G16AC",
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"MX30UF2G18AC",
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"MX30UF2G16AC",
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"MX30UF4G18AC",
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"MX30UF4G16AC",
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"MX30UF4G28AC",
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};
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if (!chip->parameters.supports_set_get_features)
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return;
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for (i = 0; i < ARRAY_SIZE(broken_get_timings); i++) {
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if (!strcmp(broken_get_timings[i], chip->parameters.model))
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break;
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}
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if (i == ARRAY_SIZE(broken_get_timings))
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return;
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bitmap_clear(chip->parameters.get_feature_list,
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ONFI_FEATURE_ADDR_TIMING_MODE, 1);
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bitmap_clear(chip->parameters.set_feature_list,
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ONFI_FEATURE_ADDR_TIMING_MODE, 1);
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}
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static int macronix_nand_init(struct nand_chip *chip)
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{
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if (nand_is_slc(chip))
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chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
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macronix_nand_fix_broken_get_timings(chip);
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macronix_nand_onfi_init(chip);
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return 0;
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}
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const struct nand_manufacturer_ops macronix_nand_manuf_ops = {
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.init = macronix_nand_init,
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};
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