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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (c) 2018 exceet electronics GmbH
- * Copyright (c) 2018 Kontron Electronics GmbH
- *
- * Author: Frieder Schrempf <frieder.schrempf@kontron.de>
- */
- #ifndef __UBOOT__
- #include <malloc.h>
- #include <linux/device.h>
- #include <linux/kernel.h>
- #endif
- #include <linux/bug.h>
- #include <linux/mtd/spinand.h>
- #define SPINAND_MFR_TOSHIBA 0x98
- #define TOSH_STATUS_ECC_HAS_BITFLIPS_T (3 << 4)
- static SPINAND_OP_VARIANTS(read_cache_variants,
- SPINAND_PAGE_READ_FROM_CACHE_X4_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(true, 0, NULL, 0));
- static SPINAND_OP_VARIANTS(update_cache_variants,
- SPINAND_PROG_LOAD(false, 0, NULL, 0));
- static int tc58cxgxsx_ooblayout_ecc(struct mtd_info *mtd, int section,
- struct mtd_oob_region *region)
- {
- if (section > 0)
- return -ERANGE;
- region->offset = mtd->oobsize / 2;
- region->length = mtd->oobsize / 2;
- return 0;
- }
- static int tc58cxgxsx_ooblayout_free(struct mtd_info *mtd, int section,
- struct mtd_oob_region *region)
- {
- if (section > 0)
- return -ERANGE;
- /* 2 bytes reserved for BBM */
- region->offset = 2;
- region->length = (mtd->oobsize / 2) - 2;
- return 0;
- }
- static const struct mtd_ooblayout_ops tc58cxgxsx_ooblayout = {
- .ecc = tc58cxgxsx_ooblayout_ecc,
- .rfree = tc58cxgxsx_ooblayout_free,
- };
- static int tc58cxgxsx_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 TOSH_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 toshiba_spinand_table[] = {
- /* 3.3V 1Gb */
- SPINAND_INFO("TC58CVG0S3", 0xC2,
- NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
- NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
- &write_cache_variants,
- &update_cache_variants),
- 0,
- SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- /* 3.3V 2Gb */
- SPINAND_INFO("TC58CVG1S3", 0xCB,
- NAND_MEMORG(1, 2048, 128, 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(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- /* 3.3V 4Gb */
- SPINAND_INFO("TC58CVG2S0", 0xCD,
- NAND_MEMORG(1, 4096, 256, 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(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- /* 3.3V 4Gb */
- SPINAND_INFO("TC58CVG2S0", 0xED,
- NAND_MEMORG(1, 4096, 256, 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(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- /* 1.8V 1Gb */
- SPINAND_INFO("TC58CYG0S3", 0xB2,
- NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
- NAND_ECCREQ(8, 512),
- SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
- &write_cache_variants,
- &update_cache_variants),
- 0,
- SPINAND_ECCINFO(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- /* 1.8V 2Gb */
- SPINAND_INFO("TC58CYG1S3", 0xBB,
- NAND_MEMORG(1, 2048, 128, 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(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- /* 1.8V 4Gb */
- SPINAND_INFO("TC58CYG2S0", 0xBD,
- NAND_MEMORG(1, 4096, 256, 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(&tc58cxgxsx_ooblayout,
- tc58cxgxsx_ecc_get_status)),
- };
- static int toshiba_spinand_detect(struct spinand_device *spinand)
- {
- u8 *id = spinand->id.data;
- int ret;
- /*
- * Toshiba SPI NAND read ID needs a dummy byte,
- * so the first byte in id is garbage.
- */
- if (id[1] != SPINAND_MFR_TOSHIBA)
- return 0;
- ret = spinand_match_and_init(spinand, toshiba_spinand_table,
- ARRAY_SIZE(toshiba_spinand_table),
- id[2]);
- if (ret)
- return ret;
- return 1;
- }
- static const struct spinand_manufacturer_ops toshiba_spinand_manuf_ops = {
- .detect = toshiba_spinand_detect,
- };
- const struct spinand_manufacturer toshiba_spinand_manufacturer = {
- .id = SPINAND_MFR_TOSHIBA,
- .name = "Toshiba",
- .ops = &toshiba_spinand_manuf_ops,
- };
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