1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2018 exceet electronics GmbH 4 * Copyright (c) 2018 Kontron Electronics GmbH 5 * 6 * Author: Frieder Schrempf <frieder.schrempf@kontron.de> 7 */ 8 9 #include <linux/device.h> 10 #include <linux/kernel.h> 11 #include <linux/mtd/spinand.h> 12 13 #define SPINAND_MFR_TOSHIBA 0x98 14 #define TOSH_STATUS_ECC_HAS_BITFLIPS_T (3 << 4) 15 16 static SPINAND_OP_VARIANTS(read_cache_variants, 17 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 18 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 19 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 20 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 21 22 static SPINAND_OP_VARIANTS(write_cache_variants, 23 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 24 25 static SPINAND_OP_VARIANTS(update_cache_variants, 26 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 27 28 static int tc58cxgxsx_ooblayout_ecc(struct mtd_info *mtd, int section, 29 struct mtd_oob_region *region) 30 { 31 if (section > 0) 32 return -ERANGE; 33 34 region->offset = mtd->oobsize / 2; 35 region->length = mtd->oobsize / 2; 36 37 return 0; 38 } 39 40 static int tc58cxgxsx_ooblayout_free(struct mtd_info *mtd, int section, 41 struct mtd_oob_region *region) 42 { 43 if (section > 0) 44 return -ERANGE; 45 46 /* 2 bytes reserved for BBM */ 47 region->offset = 2; 48 region->length = (mtd->oobsize / 2) - 2; 49 50 return 0; 51 } 52 53 static const struct mtd_ooblayout_ops tc58cxgxsx_ooblayout = { 54 .ecc = tc58cxgxsx_ooblayout_ecc, 55 .free = tc58cxgxsx_ooblayout_free, 56 }; 57 58 static int tc58cxgxsx_ecc_get_status(struct spinand_device *spinand, 59 u8 status) 60 { 61 struct nand_device *nand = spinand_to_nand(spinand); 62 u8 mbf = 0; 63 struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf); 64 65 switch (status & STATUS_ECC_MASK) { 66 case STATUS_ECC_NO_BITFLIPS: 67 return 0; 68 69 case STATUS_ECC_UNCOR_ERROR: 70 return -EBADMSG; 71 72 case STATUS_ECC_HAS_BITFLIPS: 73 case TOSH_STATUS_ECC_HAS_BITFLIPS_T: 74 /* 75 * Let's try to retrieve the real maximum number of bitflips 76 * in order to avoid forcing the wear-leveling layer to move 77 * data around if it's not necessary. 78 */ 79 if (spi_mem_exec_op(spinand->spimem, &op)) 80 return nand->eccreq.strength; 81 82 mbf >>= 4; 83 84 if (WARN_ON(mbf > nand->eccreq.strength || !mbf)) 85 return nand->eccreq.strength; 86 87 return mbf; 88 89 default: 90 break; 91 } 92 93 return -EINVAL; 94 } 95 96 static const struct spinand_info toshiba_spinand_table[] = { 97 /* 3.3V 1Gb */ 98 SPINAND_INFO("TC58CVG0S3", 0xC2, 99 NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1), 100 NAND_ECCREQ(8, 512), 101 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 102 &write_cache_variants, 103 &update_cache_variants), 104 0, 105 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 106 tc58cxgxsx_ecc_get_status)), 107 /* 3.3V 2Gb */ 108 SPINAND_INFO("TC58CVG1S3", 0xCB, 109 NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1), 110 NAND_ECCREQ(8, 512), 111 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 112 &write_cache_variants, 113 &update_cache_variants), 114 0, 115 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 116 tc58cxgxsx_ecc_get_status)), 117 /* 3.3V 4Gb */ 118 SPINAND_INFO("TC58CVG2S0", 0xCD, 119 NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1), 120 NAND_ECCREQ(8, 512), 121 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 122 &write_cache_variants, 123 &update_cache_variants), 124 0, 125 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 126 tc58cxgxsx_ecc_get_status)), 127 /* 3.3V 4Gb */ 128 SPINAND_INFO("TC58CVG2S0", 0xED, 129 NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1), 130 NAND_ECCREQ(8, 512), 131 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 132 &write_cache_variants, 133 &update_cache_variants), 134 0, 135 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 136 tc58cxgxsx_ecc_get_status)), 137 /* 1.8V 1Gb */ 138 SPINAND_INFO("TC58CYG0S3", 0xB2, 139 NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1), 140 NAND_ECCREQ(8, 512), 141 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 142 &write_cache_variants, 143 &update_cache_variants), 144 0, 145 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 146 tc58cxgxsx_ecc_get_status)), 147 /* 1.8V 2Gb */ 148 SPINAND_INFO("TC58CYG1S3", 0xBB, 149 NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1), 150 NAND_ECCREQ(8, 512), 151 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 152 &write_cache_variants, 153 &update_cache_variants), 154 0, 155 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 156 tc58cxgxsx_ecc_get_status)), 157 /* 1.8V 4Gb */ 158 SPINAND_INFO("TC58CYG2S0", 0xBD, 159 NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1), 160 NAND_ECCREQ(8, 512), 161 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 162 &write_cache_variants, 163 &update_cache_variants), 164 0, 165 SPINAND_ECCINFO(&tc58cxgxsx_ooblayout, 166 tc58cxgxsx_ecc_get_status)), 167 }; 168 169 static int toshiba_spinand_detect(struct spinand_device *spinand) 170 { 171 u8 *id = spinand->id.data; 172 int ret; 173 174 /* 175 * Toshiba SPI NAND read ID needs a dummy byte, 176 * so the first byte in id is garbage. 177 */ 178 if (id[1] != SPINAND_MFR_TOSHIBA) 179 return 0; 180 181 ret = spinand_match_and_init(spinand, toshiba_spinand_table, 182 ARRAY_SIZE(toshiba_spinand_table), 183 id[2]); 184 if (ret) 185 return ret; 186 187 return 1; 188 } 189 190 static const struct spinand_manufacturer_ops toshiba_spinand_manuf_ops = { 191 .detect = toshiba_spinand_detect, 192 }; 193 194 const struct spinand_manufacturer toshiba_spinand_manufacturer = { 195 .id = SPINAND_MFR_TOSHIBA, 196 .name = "Toshiba", 197 .ops = &toshiba_spinand_manuf_ops, 198 }; 199