diff options
Diffstat (limited to 'drivers/mtd/nand/spi')
| -rw-r--r-- | drivers/mtd/nand/spi/Makefile | 2 | ||||
| -rw-r--r-- | drivers/mtd/nand/spi/alliancememory.c | 153 | ||||
| -rw-r--r-- | drivers/mtd/nand/spi/core.c | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/spi/macronix.c | 3 |
4 files changed, 157 insertions, 2 deletions
diff --git a/drivers/mtd/nand/spi/Makefile b/drivers/mtd/nand/spi/Makefile index b520fe634041..4ec973b8b6bf 100644 --- a/drivers/mtd/nand/spi/Makefile +++ b/drivers/mtd/nand/spi/Makefile @@ -1,3 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 -spinand-objs := core.o ato.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o +spinand-objs := core.o alliancememory.o ato.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o obj-$(CONFIG_MTD_SPI_NAND) += spinand.o diff --git a/drivers/mtd/nand/spi/alliancememory.c b/drivers/mtd/nand/spi/alliancememory.c new file mode 100644 index 000000000000..7936ea546b03 --- /dev/null +++ b/drivers/mtd/nand/spi/alliancememory.c @@ -0,0 +1,153 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Author: Mario Kicherer <dev@kicherer.org> + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/mtd/spinand.h> + +#define SPINAND_MFR_ALLIANCEMEMORY 0x52 + +#define AM_STATUS_ECC_BITMASK (3 << 4) + +#define AM_STATUS_ECC_NONE_DETECTED (0 << 4) +#define AM_STATUS_ECC_CORRECTED (1 << 4) +#define AM_STATUS_ECC_ERRORED (2 << 4) +#define AM_STATUS_ECC_MAX_CORRECTED (3 << 4) + +static SPINAND_OP_VARIANTS(read_cache_variants, + SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 1, 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 am_get_eccsize(struct mtd_info *mtd) +{ + if (mtd->oobsize == 64) + return 0x20; + else if (mtd->oobsize == 128) + return 0x38; + else if (mtd->oobsize == 256) + return 0x70; + else + return -EINVAL; +} + +static int am_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + int ecc_bytes; + + ecc_bytes = am_get_eccsize(mtd); + if (ecc_bytes < 0) + return ecc_bytes; + + region->offset = mtd->oobsize - ecc_bytes; + region->length = ecc_bytes; + + return 0; +} + +static int am_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + int ecc_bytes; + + if (section) + return -ERANGE; + + ecc_bytes = am_get_eccsize(mtd); + if (ecc_bytes < 0) + return ecc_bytes; + + /* + * It is unclear how many bytes are used for the bad block marker. We + * reserve the common two bytes here. + * + * The free area in this kind of flash is divided into chunks where the + * first 4 bytes of each chunk are unprotected. The number of chunks + * depends on the specific model. The models with 4096+256 bytes pages + * have 8 chunks, the others 4 chunks. + */ + + region->offset = 2; + region->length = mtd->oobsize - 2 - ecc_bytes; + + return 0; +} + +static const struct mtd_ooblayout_ops am_ooblayout = { + .ecc = am_ooblayout_ecc, + .free = am_ooblayout_free, +}; + +static int am_ecc_get_status(struct spinand_device *spinand, u8 status) +{ + switch (status & AM_STATUS_ECC_BITMASK) { + case AM_STATUS_ECC_NONE_DETECTED: + return 0; + + case AM_STATUS_ECC_CORRECTED: + /* + * use oobsize to determine the flash model and the maximum of + * correctable errors and return maximum - 1 by convention + */ + if (spinand->base.mtd.oobsize == 64) + return 3; + else + return 7; + + case AM_STATUS_ECC_ERRORED: + return -EBADMSG; + + case AM_STATUS_ECC_MAX_CORRECTED: + /* + * use oobsize to determine the flash model and the maximum of + * correctable errors + */ + if (spinand->base.mtd.oobsize == 64) + return 4; + else + return 8; + + default: + break; + } + + return -EINVAL; +} + +static const struct spinand_info alliancememory_spinand_table[] = { + SPINAND_INFO("AS5F34G04SND", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x2f), + NAND_MEMORG(1, 2048, 128, 64, 4096, 80, 1, 1, 1), + NAND_ECCREQ(4, 512), + SPINAND_INFO_OP_VARIANTS(&read_cache_variants, + &write_cache_variants, + &update_cache_variants), + SPINAND_HAS_QE_BIT, + SPINAND_ECCINFO(&am_ooblayout, + am_ecc_get_status)), +}; + +static const struct spinand_manufacturer_ops alliancememory_spinand_manuf_ops = { +}; + +const struct spinand_manufacturer alliancememory_spinand_manufacturer = { + .id = SPINAND_MFR_ALLIANCEMEMORY, + .name = "AllianceMemory", + .chips = alliancememory_spinand_table, + .nchips = ARRAY_SIZE(alliancememory_spinand_table), + .ops = &alliancememory_spinand_manuf_ops, +}; diff --git a/drivers/mtd/nand/spi/core.c b/drivers/mtd/nand/spi/core.c index dacd9c0e8b20..638391f77d8c 100644 --- a/drivers/mtd/nand/spi/core.c +++ b/drivers/mtd/nand/spi/core.c @@ -937,6 +937,7 @@ static const struct nand_ops spinand_ops = { }; static const struct spinand_manufacturer *spinand_manufacturers[] = { + &alliancememory_spinand_manufacturer, &ato_spinand_manufacturer, &gigadevice_spinand_manufacturer, ¯onix_spinand_manufacturer, diff --git a/drivers/mtd/nand/spi/macronix.c b/drivers/mtd/nand/spi/macronix.c index dce835132a1e..722a9738ba37 100644 --- a/drivers/mtd/nand/spi/macronix.c +++ b/drivers/mtd/nand/spi/macronix.c @@ -83,9 +83,10 @@ static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand, * in order to avoid forcing the wear-leveling layer to move * data around if it's not necessary. */ - if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr)) + if (mx35lf1ge4ab_get_eccsr(spinand, spinand->scratchbuf)) return nanddev_get_ecc_conf(nand)->strength; + eccsr = *spinand->scratchbuf; if (WARN_ON(eccsr > nanddev_get_ecc_conf(nand)->strength || !eccsr)) return nanddev_get_ecc_conf(nand)->strength; |