diff options
Diffstat (limited to 'drivers/mtd/nand/spi/gigadevice.c')
| -rw-r--r-- | drivers/mtd/nand/spi/gigadevice.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/drivers/mtd/nand/spi/gigadevice.c b/drivers/mtd/nand/spi/gigadevice.c new file mode 100644 index 000000000000..e4141c20947a --- /dev/null +++ b/drivers/mtd/nand/spi/gigadevice.c @@ -0,0 +1,148 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Author: + * Chuanhong Guo <gch981213@gmail.com> + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/mtd/spinand.h> + +#define SPINAND_MFR_GIGADEVICE 0xC8 +#define GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS (1 << 4) +#define GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS (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 gd5fxgq4xa_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 gd5fxgq4xa_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 3) + return -ERANGE; + + if (section) { + region->offset = 16 * section; + region->length = 8; + } else { + /* section 0 has one byte reserved for bad block mark */ + region->offset = 1; + region->length = 7; + } + return 0; +} + +static int gd5fxgq4xa_ecc_get_status(struct spinand_device *spinand, + u8 status) +{ + switch (status & STATUS_ECC_MASK) { + case STATUS_ECC_NO_BITFLIPS: + return 0; + + case GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS: + /* 1-7 bits are flipped. return the maximum. */ + return 7; + + case GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS: + return 8; + + case STATUS_ECC_UNCOR_ERROR: + return -EBADMSG; + + default: + break; + } + + return -EINVAL; +} + +static const struct mtd_ooblayout_ops gd5fxgq4xa_ooblayout = { + .ecc = gd5fxgq4xa_ooblayout_ecc, + .free = gd5fxgq4xa_ooblayout_free, +}; + +static const struct spinand_info gigadevice_spinand_table[] = { + SPINAND_INFO("GD5F1GQ4xA", 0xF1, + NAND_MEMORG(1, 2048, 64, 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(&gd5fxgq4xa_ooblayout, + gd5fxgq4xa_ecc_get_status)), + SPINAND_INFO("GD5F2GQ4xA", 0xF2, + 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(&gd5fxgq4xa_ooblayout, + gd5fxgq4xa_ecc_get_status)), + SPINAND_INFO("GD5F4GQ4xA", 0xF4, + 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(&gd5fxgq4xa_ooblayout, + gd5fxgq4xa_ecc_get_status)), +}; + +static int gigadevice_spinand_detect(struct spinand_device *spinand) +{ + u8 *id = spinand->id.data; + int ret; + + /* + * For GD NANDs, There is an address byte needed to shift in before IDs + * are read out, so the first byte in raw_id is dummy. + */ + if (id[1] != SPINAND_MFR_GIGADEVICE) + return 0; + + ret = spinand_match_and_init(spinand, gigadevice_spinand_table, + ARRAY_SIZE(gigadevice_spinand_table), + id[2]); + if (ret) + return ret; + + return 1; +} + +static const struct spinand_manufacturer_ops gigadevice_spinand_manuf_ops = { + .detect = gigadevice_spinand_detect, +}; + +const struct spinand_manufacturer gigadevice_spinand_manufacturer = { + .id = SPINAND_MFR_GIGADEVICE, + .name = "GigaDevice", + .ops = &gigadevice_spinand_manuf_ops, +}; |