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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2017 exceet electronics GmbH4 *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 0xEF15 16#define WINBOND_CFG_BUF_READ BIT(3)17 18#define W25N04KV_STATUS_ECC_5_8_BITFLIPS (3 << 4)19 20static 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 28static SPINAND_OP_VARIANTS(write_cache_variants,29 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),30 SPINAND_PROG_LOAD(true, 0, NULL, 0));31 32static SPINAND_OP_VARIANTS(update_cache_variants,33 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),34 SPINAND_PROG_LOAD(false, 0, NULL, 0));35 36static 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 48static 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 60static const struct mtd_ooblayout_ops w25m02gv_ooblayout = {61 .ecc = w25m02gv_ooblayout_ecc,62 .free = w25m02gv_ooblayout_free,63};64 65static 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 79static 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 91static 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 103static 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 115static const struct mtd_ooblayout_ops w25n01kv_ooblayout = {116 .ecc = w25n01kv_ooblayout_ecc,117 .free = w25n02kv_ooblayout_free,118};119 120static const struct mtd_ooblayout_ops w25n02kv_ooblayout = {121 .ecc = w25n02kv_ooblayout_ecc,122 .free = w25n02kv_ooblayout_free,123};124 125static 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 bitflips143 * in order to avoid forcing the wear-leveling layer to move144 * 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 163static 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 257static 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 read264 * 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 275static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {276 .init = winbond_spinand_init,277};278 279const 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