108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
#ifndef __UBOOT__
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#include <malloc.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#endif
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#include <linux/bitops.h>
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#include <linux/mtd/spinand.h>
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#define SPINAND_MFR_FUDAN 0xA1
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#define FM25S01B_STATUS_ECC_MASK (7 << 4)
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#define STATUS_ECC_1_3_BITFLIPS (1 << 4)
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#define STATUS_ECC_4_6_BITFLIPS (3 << 4)
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#define STATUS_ECC_7_8_BITFLIPS (5 << 4)
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static SPINAND_OP_VARIANTS(read_cache_variants,
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SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
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SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
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static SPINAND_OP_VARIANTS(write_cache_variants,
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SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
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SPINAND_PROG_LOAD(true, 0, NULL, 0));
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static SPINAND_OP_VARIANTS(update_cache_variants,
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SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
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SPINAND_PROG_LOAD(false, 0, NULL, 0));
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static int fm25s01b_ooblayout_ecc(struct mtd_info *mtd, int section,
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struct mtd_oob_region *region)
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{
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if (section)
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return -ERANGE;
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region->offset = 64;
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region->length = 64;
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return 0;
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}
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static int fm25s01b_ooblayout_free(struct mtd_info *mtd, int section,
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struct mtd_oob_region *region)
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{
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if (section > 3)
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return -ERANGE;
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region->offset = (16 * section) + 4;
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region->length = 12;
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return 0;
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}
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static const struct mtd_ooblayout_ops fm25s01b_ooblayout = {
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.ecc = fm25s01b_ooblayout_ecc,
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.rfree = fm25s01b_ooblayout_free,
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};
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static int fm25s01b_ecc_get_status(struct spinand_device *spinand,
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u8 status)
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{
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switch (status & FM25S01B_STATUS_ECC_MASK) {
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case STATUS_ECC_NO_BITFLIPS:
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return 0;
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case STATUS_ECC_UNCOR_ERROR:
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return -EBADMSG;
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case STATUS_ECC_1_3_BITFLIPS:
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return 3;
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case STATUS_ECC_4_6_BITFLIPS:
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return 6;
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case STATUS_ECC_7_8_BITFLIPS:
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return 8;
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default:
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break;
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}
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return -EINVAL;
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}
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static const struct spinand_info fudan_spinand_table[] = {
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SPINAND_INFO("FM25s01B",
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SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xD4),
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NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
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NAND_ECCREQ(8, 512),
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SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
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&write_cache_variants,
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&update_cache_variants),
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SPINAND_HAS_QE_BIT,
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SPINAND_ECCINFO(&fm25s01b_ooblayout,
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fm25s01b_ecc_get_status)),
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};
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static const struct spinand_manufacturer_ops fudan_spinand_manuf_ops = {
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};
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const struct spinand_manufacturer fudan_spinand_manufacturer = {
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.id = SPINAND_MFR_FUDAN,
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.name = "FUDAN Micron",
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.chips = fudan_spinand_table,
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.nchips = ARRAY_SIZE(fudan_spinand_table),
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.ops = &fudan_spinand_manuf_ops,
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};
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