1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2017 exceet electronics GmbH 4 * 5 * Authors: 6 * Frieder Schrempf <frieder.schrempf@exceet.de> 7 * Boris Brezillon <boris.brezillon@bootlin.com> 8 */ 9 10 #include <linux/device.h> 11 #include <linux/kernel.h> 12 #include <linux/mtd/spinand.h> 13 14 #define SPINAND_MFR_WINBOND 0xEF 15 16 #define WINBOND_CFG_BUF_READ BIT(3) 17 18 #define W25N04KV_STATUS_ECC_5_8_BITFLIPS (3 << 4) 19 20 static SPINAND_OP_VARIANTS(read_cache_variants, 21 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), 22 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), 23 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0), 24 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), 25 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), 26 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); 27 28 static SPINAND_OP_VARIANTS(write_cache_variants, 29 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), 30 SPINAND_PROG_LOAD(true, 0, NULL, 0)); 31 32 static SPINAND_OP_VARIANTS(update_cache_variants, 33 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), 34 SPINAND_PROG_LOAD(false, 0, NULL, 0)); 35 36 static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section, 37 struct mtd_oob_region *region) 38 { 39 if (section > 3) 40 return -ERANGE; 41 42 region->offset = (16 * section) + 8; 43 region->length = 8; 44 45 return 0; 46 } 47 48 static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section, 49 struct mtd_oob_region *region) 50 { 51 if (section > 3) 52 return -ERANGE; 53 54 region->offset = (16 * section) + 2; 55 region->length = 6; 56 57 return 0; 58 } 59 60 static const struct mtd_ooblayout_ops w25m02gv_ooblayout = { 61 .ecc = w25m02gv_ooblayout_ecc, 62 .free = w25m02gv_ooblayout_free, 63 }; 64 65 static int w25m02gv_select_target(struct spinand_device *spinand, 66 unsigned int target) 67 { 68 struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1), 69 SPI_MEM_OP_NO_ADDR, 70 SPI_MEM_OP_NO_DUMMY, 71 SPI_MEM_OP_DATA_OUT(1, 72 spinand->scratchbuf, 73 1)); 74 75 *spinand->scratchbuf = target; 76 return spi_mem_exec_op(spinand->spimem, &op); 77 } 78 79 static int w25n01kv_ooblayout_ecc(struct mtd_info *mtd, int section, 80 struct mtd_oob_region *region) 81 { 82 if (section > 3) 83 return -ERANGE; 84 85 region->offset = 64 + (8 * section); 86 region->length = 7; 87 88 return 0; 89 } 90 91 static int w25n02kv_ooblayout_ecc(struct mtd_info *mtd, int section, 92 struct mtd_oob_region *region) 93 { 94 if (section > 3) 95 return -ERANGE; 96 97 region->offset = 64 + (16 * section); 98 region->length = 13; 99 100 return 0; 101 } 102 103 static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section, 104 struct mtd_oob_region *region) 105 { 106 if (section > 3) 107 return -ERANGE; 108 109 region->offset = (16 * section) + 2; 110 region->length = 14; 111 112 return 0; 113 } 114 115 static const struct mtd_ooblayout_ops w25n01kv_ooblayout = { 116 .ecc = w25n01kv_ooblayout_ecc, 117 .free = w25n02kv_ooblayout_free, 118 }; 119 120 static const struct mtd_ooblayout_ops w25n02kv_ooblayout = { 121 .ecc = w25n02kv_ooblayout_ecc, 122 .free = w25n02kv_ooblayout_free, 123 }; 124 125 static int w25n02kv_ecc_get_status(struct spinand_device *spinand, 126 u8 status) 127 { 128 struct nand_device *nand = spinand_to_nand(spinand); 129 u8 mbf = 0; 130 struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, spinand->scratchbuf); 131 132 switch (status & STATUS_ECC_MASK) { 133 case STATUS_ECC_NO_BITFLIPS: 134 return 0; 135 136 case STATUS_ECC_UNCOR_ERROR: 137 return -EBADMSG; 138 139 case STATUS_ECC_HAS_BITFLIPS: 140 case W25N04KV_STATUS_ECC_5_8_BITFLIPS: 141 /* 142 * Let's try to retrieve the real maximum number of bitflips 143 * in order to avoid forcing the wear-leveling layer to move 144 * data around if it's not necessary. 145 */ 146 if (spi_mem_exec_op(spinand->spimem, &op)) 147 return nanddev_get_ecc_conf(nand)->strength; 148 149 mbf = *(spinand->scratchbuf) >> 4; 150 151 if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf)) 152 return nanddev_get_ecc_conf(nand)->strength; 153 154 return mbf; 155 156 default: 157 break; 158 } 159 160 return -EINVAL; 161 } 162 163 static const struct spinand_info winbond_spinand_table[] = { 164 SPINAND_INFO("W25M02GV", 165 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab, 0x21), 166 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 2), 167 NAND_ECCREQ(1, 512), 168 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 169 &write_cache_variants, 170 &update_cache_variants), 171 0, 172 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL), 173 SPINAND_SELECT_TARGET(w25m02gv_select_target)), 174 SPINAND_INFO("W25N01GV", 175 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x21), 176 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), 177 NAND_ECCREQ(1, 512), 178 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 179 &write_cache_variants, 180 &update_cache_variants), 181 0, 182 SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)), 183 SPINAND_INFO("W25N01KV", 184 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xae, 0x21), 185 NAND_MEMORG(1, 2048, 96, 64, 1024, 20, 1, 1, 1), 186 NAND_ECCREQ(4, 512), 187 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 188 &write_cache_variants, 189 &update_cache_variants), 190 0, 191 SPINAND_ECCINFO(&w25n01kv_ooblayout, w25n02kv_ecc_get_status)), 192 SPINAND_INFO("W25N02KV", 193 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x22), 194 NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1), 195 NAND_ECCREQ(8, 512), 196 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 197 &write_cache_variants, 198 &update_cache_variants), 199 0, 200 SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), 201 SPINAND_INFO("W25N01JW", 202 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbc, 0x21), 203 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), 204 NAND_ECCREQ(4, 512), 205 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 206 &write_cache_variants, 207 &update_cache_variants), 208 0, 209 SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)), 210 SPINAND_INFO("W25N02JWZEIF", 211 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbf, 0x22), 212 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 2, 1), 213 NAND_ECCREQ(4, 512), 214 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 215 &write_cache_variants, 216 &update_cache_variants), 217 0, 218 SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), 219 SPINAND_INFO("W25N512GW", 220 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x20), 221 NAND_MEMORG(1, 2048, 64, 64, 512, 10, 1, 1, 1), 222 NAND_ECCREQ(4, 512), 223 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 224 &write_cache_variants, 225 &update_cache_variants), 226 0, 227 SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), 228 SPINAND_INFO("W25N02KWZEIR", 229 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x22), 230 NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1), 231 NAND_ECCREQ(8, 512), 232 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 233 &write_cache_variants, 234 &update_cache_variants), 235 0, 236 SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), 237 SPINAND_INFO("W25N01GWZEIG", 238 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x21), 239 NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), 240 NAND_ECCREQ(4, 512), 241 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 242 &write_cache_variants, 243 &update_cache_variants), 244 0, 245 SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)), 246 SPINAND_INFO("W25N04KV", 247 SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x23), 248 NAND_MEMORG(1, 2048, 128, 64, 4096, 40, 2, 1, 1), 249 NAND_ECCREQ(8, 512), 250 SPINAND_INFO_OP_VARIANTS(&read_cache_variants, 251 &write_cache_variants, 252 &update_cache_variants), 253 0, 254 SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), 255 }; 256 257 static int winbond_spinand_init(struct spinand_device *spinand) 258 { 259 struct nand_device *nand = spinand_to_nand(spinand); 260 unsigned int i; 261 262 /* 263 * Make sure all dies are in buffer read mode and not continuous read 264 * mode. 265 */ 266 for (i = 0; i < nand->memorg.ntargets; i++) { 267 spinand_select_target(spinand, i); 268 spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ, 269 WINBOND_CFG_BUF_READ); 270 } 271 272 return 0; 273 } 274 275 static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = { 276 .init = winbond_spinand_init, 277 }; 278 279 const struct spinand_manufacturer winbond_spinand_manufacturer = { 280 .id = SPINAND_MFR_WINBOND, 281 .name = "Winbond", 282 .chips = winbond_spinand_table, 283 .nchips = ARRAY_SIZE(winbond_spinand_table), 284 .ops = &winbond_spinand_manuf_ops, 285 }; 286