1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2017 Free Electrons 4 * Copyright (C) 2017 NextThing Co 5 * 6 * Author: Boris Brezillon <boris.brezillon@free-electrons.com> 7 */ 8 9 #include "internals.h" 10 11 #define MACRONIX_READ_RETRY_BIT BIT(0) 12 #define MACRONIX_NUM_READ_RETRY_MODES 6 13 14 struct nand_onfi_vendor_macronix { 15 u8 reserved; 16 u8 reliability_func; 17 } __packed; 18 19 static int macronix_nand_setup_read_retry(struct nand_chip *chip, int mode) 20 { 21 u8 feature[ONFI_SUBFEATURE_PARAM_LEN]; 22 23 if (!chip->parameters.supports_set_get_features || 24 !test_bit(ONFI_FEATURE_ADDR_READ_RETRY, 25 chip->parameters.set_feature_list)) 26 return -ENOTSUPP; 27 28 feature[0] = mode; 29 return nand_set_features(chip, ONFI_FEATURE_ADDR_READ_RETRY, feature); 30 } 31 32 static void macronix_nand_onfi_init(struct nand_chip *chip) 33 { 34 struct nand_parameters *p = &chip->parameters; 35 struct nand_onfi_vendor_macronix *mxic; 36 37 if (!p->onfi) 38 return; 39 40 mxic = (struct nand_onfi_vendor_macronix *)p->onfi->vendor; 41 if ((mxic->reliability_func & MACRONIX_READ_RETRY_BIT) == 0) 42 return; 43 44 chip->read_retries = MACRONIX_NUM_READ_RETRY_MODES; 45 chip->setup_read_retry = macronix_nand_setup_read_retry; 46 47 if (p->supports_set_get_features) { 48 bitmap_set(p->set_feature_list, 49 ONFI_FEATURE_ADDR_READ_RETRY, 1); 50 bitmap_set(p->get_feature_list, 51 ONFI_FEATURE_ADDR_READ_RETRY, 1); 52 } 53 } 54 55 /* 56 * Macronix AC series does not support using SET/GET_FEATURES to change 57 * the timings unlike what is declared in the parameter page. Unflag 58 * this feature to avoid unnecessary downturns. 59 */ 60 static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip) 61 { 62 int i; 63 static const char * const broken_get_timings[] = { 64 "MX30LF1G18AC", 65 "MX30LF1G28AC", 66 "MX30LF2G18AC", 67 "MX30LF2G28AC", 68 "MX30LF4G18AC", 69 "MX30LF4G28AC", 70 "MX60LF8G18AC", 71 "MX30UF1G18AC", 72 "MX30UF1G16AC", 73 "MX30UF2G18AC", 74 "MX30UF2G16AC", 75 "MX30UF4G18AC", 76 "MX30UF4G16AC", 77 "MX30UF4G28AC", 78 }; 79 80 if (!chip->parameters.supports_set_get_features) 81 return; 82 83 i = match_string(broken_get_timings, ARRAY_SIZE(broken_get_timings), 84 chip->parameters.model); 85 if (i < 0) 86 return; 87 88 bitmap_clear(chip->parameters.get_feature_list, 89 ONFI_FEATURE_ADDR_TIMING_MODE, 1); 90 bitmap_clear(chip->parameters.set_feature_list, 91 ONFI_FEATURE_ADDR_TIMING_MODE, 1); 92 } 93 94 static int macronix_nand_init(struct nand_chip *chip) 95 { 96 if (nand_is_slc(chip)) 97 chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE; 98 99 macronix_nand_fix_broken_get_timings(chip); 100 macronix_nand_onfi_init(chip); 101 102 return 0; 103 } 104 105 const struct nand_manufacturer_ops macronix_nand_manuf_ops = { 106 .init = macronix_nand_init, 107 }; 108