diff options
Diffstat (limited to 'drivers/mtd/nand/spi/paragon.c')
| -rw-r--r-- | drivers/mtd/nand/spi/paragon.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/drivers/mtd/nand/spi/paragon.c b/drivers/mtd/nand/spi/paragon.c new file mode 100644 index 0000000000..519ade513c --- /dev/null +++ b/drivers/mtd/nand/spi/paragon.c @@ -0,0 +1,131 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Jeff Kletsky + * + * Author: Jeff Kletsky <git-commits@allycomm.com> + */ + +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/mtd/spinand.h> + + +#define SPINAND_MFR_PARAGON 0xa1 + + +#define PN26G0XA_STATUS_ECC_BITMASK (3 << 4) + +#define PN26G0XA_STATUS_ECC_NONE_DETECTED (0 << 4) +#define PN26G0XA_STATUS_ECC_1_7_CORRECTED (1 << 4) +#define PN26G0XA_STATUS_ECC_ERRORED (2 << 4) +#define PN26G0XA_STATUS_ECC_8_CORRECTED (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 pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 3) + return -ERANGE; + + region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */ + region->length = 13; + + return 0; +} + +static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *region) +{ + if (section > 4) + return -ERANGE; + + if (section == 4) { + region->offset = 64; + region->length = 64; + } else { + region->offset = 4 + (15 * section); + region->length = 2; + } + + return 0; +} + +static int pn26g0xa_ecc_get_status(struct spinand_device *spinand, + u8 status) +{ + switch (status & PN26G0XA_STATUS_ECC_BITMASK) { + case PN26G0XA_STATUS_ECC_NONE_DETECTED: + return 0; + + case PN26G0XA_STATUS_ECC_1_7_CORRECTED: + return 7; /* Return upper limit by convention */ + + case PN26G0XA_STATUS_ECC_8_CORRECTED: + return 8; + + case PN26G0XA_STATUS_ECC_ERRORED: + return -EBADMSG; + + default: + break; + } + + return -EINVAL; +} + +static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = { + .ecc = pn26g0xa_ooblayout_ecc, + .free = pn26g0xa_ooblayout_free, +}; + + +static const struct spinand_info paragon_spinand_table[] = { + SPINAND_INFO("PN26G01A", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe1), + NAND_MEMORG(1, 2048, 128, 64, 1024, 21, 1, 1, 1), + NAND_ECCREQ(8, 512), + SPINAND_INFO_OP_VARIANTS(&read_cache_variants, + &write_cache_variants, + &update_cache_variants), + 0, + SPINAND_ECCINFO(&pn26g0xa_ooblayout, + pn26g0xa_ecc_get_status)), + SPINAND_INFO("PN26G02A", + SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xe2), + NAND_MEMORG(1, 2048, 128, 64, 2048, 41, 1, 1, 1), + NAND_ECCREQ(8, 512), + SPINAND_INFO_OP_VARIANTS(&read_cache_variants, + &write_cache_variants, + &update_cache_variants), + 0, + SPINAND_ECCINFO(&pn26g0xa_ooblayout, + pn26g0xa_ecc_get_status)), +}; + +static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = { +}; + +const struct spinand_manufacturer paragon_spinand_manufacturer = { + .id = SPINAND_MFR_PARAGON, + .name = "Paragon", + .chips = paragon_spinand_table, + .nchips = ARRAY_SIZE(paragon_spinand_table), + .ops = ¶gon_spinand_manuf_ops, +}; |