| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2017 exceet electronics GmbH |
| * |
| * Authors: |
| * Frieder Schrempf <frieder.schrempf@exceet.de> |
| * Boris Brezillon <boris.brezillon@bootlin.com> |
| */ |
| |
| #include <linux/device.h> |
| #include <linux/kernel.h> |
| #include <linux/mtd/spinand.h> |
| |
| #define SPINAND_MFR_WINBOND 0xEF |
| |
| #define WINBOND_CFG_BUF_READ BIT(3) |
| |
| 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, |
| .free = 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->spimem, &op); |
| } |
| |
| static int w25n02kv_ooblayout_ecc(struct mtd_info *mtd, int section, |
| struct mtd_oob_region *region) |
| { |
| if (section > 3) |
| return -ERANGE; |
| |
| region->offset = 64 + (16 * section); |
| region->length = 13; |
| |
| return 0; |
| } |
| |
| static int w25n02kv_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 = 14; |
| |
| return 0; |
| } |
| |
| static const struct mtd_ooblayout_ops w25n02kv_ooblayout = { |
| .ecc = w25n02kv_ooblayout_ecc, |
| .free = 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, spinand->scratchbuf); |
| |
| switch (status & STATUS_ECC_MASK) { |
| case STATUS_ECC_NO_BITFLIPS: |
| return 0; |
| |
| case STATUS_ECC_UNCOR_ERROR: |
| return -EBADMSG; |
| |
| case STATUS_ECC_HAS_BITFLIPS: |
| /* |
| * 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->spimem, &op)) |
| return nanddev_get_ecc_conf(nand)->strength; |
| |
| mbf = *(spinand->scratchbuf) >> 4; |
| |
| if (WARN_ON(mbf > nanddev_get_ecc_conf(nand)->strength || !mbf)) |
| return nanddev_get_ecc_conf(nand)->strength; |
| |
| return mbf; |
| |
| default: |
| break; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static const struct spinand_info winbond_spinand_table[] = { |
| SPINAND_INFO("W25M02GV", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xab, 0x21), |
| NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 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)), |
| SPINAND_INFO("W25N01GV", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x21), |
| NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 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_INFO("W25N02KV", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa, 0x22), |
| NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 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("W25N01JW", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbc, 0x21), |
| NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), |
| NAND_ECCREQ(4, 512), |
| SPINAND_INFO_OP_VARIANTS(&read_cache_variants, |
| &write_cache_variants, |
| &update_cache_variants), |
| 0, |
| SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)), |
| SPINAND_INFO("W25N02JWZEIF", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xbf, 0x22), |
| NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 2, 1), |
| NAND_ECCREQ(4, 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("W25N512GW", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x20), |
| NAND_MEMORG(1, 2048, 64, 64, 512, 10, 1, 1, 1), |
| NAND_ECCREQ(4, 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("W25N02KWZEIR", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x22), |
| NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 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("W25N01GWZEIG", |
| SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xba, 0x21), |
| NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1), |
| NAND_ECCREQ(4, 512), |
| SPINAND_INFO_OP_VARIANTS(&read_cache_variants, |
| &write_cache_variants, |
| &update_cache_variants), |
| 0, |
| SPINAND_ECCINFO(&w25m02gv_ooblayout, w25n02kv_ecc_get_status)), |
| }; |
| |
| 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 = { |
| .init = winbond_spinand_init, |
| }; |
| |
| const struct spinand_manufacturer winbond_spinand_manufacturer = { |
| .id = SPINAND_MFR_WINBOND, |
| .name = "Winbond", |
| .chips = winbond_spinand_table, |
| .nchips = ARRAY_SIZE(winbond_spinand_table), |
| .ops = &winbond_spinand_manuf_ops, |
| }; |
