// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2017 exceet electronics GmbH * * Authors: * Frieder Schrempf * Boris Brezillon */ #ifndef __UBOOT__ #include #include #endif #include #define SPINAND_MFR_WINBOND 0xEF #define WINBOND_CFG_BUF_READ BIT(3) #define WINBOND_STATUS_ECC_HAS_BITFLIPS_T (3 << 4) static SPINAND_OP_VARIANTS(read_cache_variants, SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0), SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0), SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0), SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0), SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0), SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0)); static SPINAND_OP_VARIANTS(write_cache_variants, SPINAND_PROG_LOAD_X4(true, 0, NULL, 0), SPINAND_PROG_LOAD(true, 0, NULL, 0)); static SPINAND_OP_VARIANTS(update_cache_variants, SPINAND_PROG_LOAD_X4(false, 0, NULL, 0), SPINAND_PROG_LOAD(false, 0, NULL, 0)); static int w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section, struct mtd_oob_region *region) { if (section > 3) return -ERANGE; region->offset = (16 * section) + 8; region->length = 8; return 0; } static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section, struct mtd_oob_region *region) { if (section > 3) return -ERANGE; region->offset = (16 * section) + 2; region->length = 6; return 0; } static const struct mtd_ooblayout_ops w25m02gv_ooblayout = { .ecc = w25m02gv_ooblayout_ecc, .rfree = w25m02gv_ooblayout_free, }; static int w25m02gv_select_target(struct spinand_device *spinand, unsigned int target) { struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1), SPI_MEM_OP_NO_ADDR, SPI_MEM_OP_NO_DUMMY, SPI_MEM_OP_DATA_OUT(1, spinand->scratchbuf, 1)); *spinand->scratchbuf = target; return spi_mem_exec_op(spinand->slave, &op); } static int w25n02kv_ooblayout_ecc(struct mtd_info *mtd, int section, struct mtd_oob_region *region) { if (section) return -ERANGE; region->offset = 64; region->length = 64; return 0; } static int w25n02kv_ooblayout_free(struct mtd_info *mtd, int section, struct mtd_oob_region *region) { if (section) return -ERANGE; /* Reserve 2 bytes for the BBM. */ region->offset = 2; region->length = 62; return 0; } static const struct mtd_ooblayout_ops w25n02kv_ooblayout = { .ecc = w25n02kv_ooblayout_ecc, .rfree = w25n02kv_ooblayout_free, }; static int w25n02kv_ecc_get_status(struct spinand_device *spinand, u8 status) { struct nand_device *nand = spinand_to_nand(spinand); u8 mbf = 0; struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf); switch (status & STATUS_ECC_MASK) { case STATUS_ECC_NO_BITFLIPS: return 0; case STATUS_ECC_UNCOR_ERROR: return -EBADMSG; case STATUS_ECC_HAS_BITFLIPS: case WINBOND_STATUS_ECC_HAS_BITFLIPS_T: /* * Let's try to retrieve the real maximum number of bitflips * in order to avoid forcing the wear-leveling layer to move * data around if it's not necessary. */ if (spi_mem_exec_op(spinand->slave, &op)) return nand->eccreq.strength; mbf >>= 4; if (WARN_ON(mbf > nand->eccreq.strength || !mbf)) return nand->eccreq.strength; return mbf; default: break; } return -EINVAL; } static const struct spinand_info winbond_spinand_table[] = { SPINAND_INFO("W25M02GV", 0xAB, NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 2), NAND_ECCREQ(1, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, &write_cache_variants, &update_cache_variants), 0, SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL), SPINAND_SELECT_TARGET(w25m02gv_select_target)), }; /* Another set for the same id[2] devices in one series */ static const struct spinand_info winbond_spinand_table2[] = { SPINAND_INFO("W25N01GV", 0x21, NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1), NAND_ECCREQ(1, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, &write_cache_variants, &update_cache_variants), 0, SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL), SPINAND_SELECT_TARGET(w25m02gv_select_target)), SPINAND_INFO("W25N02KV", 0x22, NAND_MEMORG(1, 2048, 64, 64, 2048, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, &write_cache_variants, &update_cache_variants), 0, SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), SPINAND_INFO("W25N04KV", 0x23, NAND_MEMORG(1, 2048, 64, 64, 4096, 1, 1, 1), NAND_ECCREQ(8, 512), SPINAND_INFO_OP_VARIANTS(&read_cache_variants, &write_cache_variants, &update_cache_variants), 0, SPINAND_ECCINFO(&w25n02kv_ooblayout, w25n02kv_ecc_get_status)), }; /** * winbond_spinand_detect - initialize device related part in spinand_device * struct if it is a Winbond device. * @spinand: SPI NAND device structure */ static int winbond_spinand_detect(struct spinand_device *spinand) { u8 *id = spinand->id.data; int ret; /* * Winbond SPI NAND read ID need a dummy byte, * so the first byte in raw_id is dummy. */ if (id[1] != SPINAND_MFR_WINBOND) return 0; if (id[2] == 0xAA) ret = spinand_match_and_init(spinand, winbond_spinand_table2, ARRAY_SIZE(winbond_spinand_table2), id[3]); else ret = spinand_match_and_init(spinand, winbond_spinand_table, ARRAY_SIZE(winbond_spinand_table), id[2]); if (ret) return ret; return 1; } static int winbond_spinand_init(struct spinand_device *spinand) { struct nand_device *nand = spinand_to_nand(spinand); unsigned int i; /* * Make sure all dies are in buffer read mode and not continuous read * mode. */ for (i = 0; i < nand->memorg.ntargets; i++) { spinand_select_target(spinand, i); spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ, WINBOND_CFG_BUF_READ); } return 0; } static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = { .detect = winbond_spinand_detect, .init = winbond_spinand_init, }; const struct spinand_manufacturer winbond_spinand_manufacturer = { .id = SPINAND_MFR_WINBOND, .name = "Winbond", .ops = &winbond_spinand_manuf_ops, };