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// SPDX-License-Identifier: GPL-2.0
/*
* Author:
* Felix Matouschek <felix@matouschek.org>
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_XTX 0x0B
#define XT26G0XA_STATUS_ECC_MASK GENMASK(5, 2)
#define XT26G0XA_STATUS_ECC_NO_DETECTED (0 << 2)
#define XT26G0XA_STATUS_ECC_8_CORRECTED (3 << 4)
#define XT26G0XA_STATUS_ECC_UNCOR_ERROR (2 << 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 xt26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
region->offset = 48;
region->length = 16;
return 0;
}
static int xt26g0xa_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section)
return -ERANGE;
region->offset = 1;
region->length = 47;
return 0;
}
static const struct mtd_ooblayout_ops xt26g0xa_ooblayout = {
.ecc = xt26g0xa_ooblayout_ecc,
.free = xt26g0xa_ooblayout_free,
};
static int xt26g0xa_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
status = status & XT26G0XA_STATUS_ECC_MASK;
switch (status) {
case XT26G0XA_STATUS_ECC_NO_DETECTED:
return 0;
case XT26G0XA_STATUS_ECC_8_CORRECTED:
return 8;
case XT26G0XA_STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
default:
break;
}
/* At this point values greater than (2 << 4) are invalid */
if (status > XT26G0XA_STATUS_ECC_UNCOR_ERROR)
return -EINVAL;
/* (1 << 2) through (7 << 2) are 1-7 corrected errors */
return status >> 2;
}
static const struct spinand_info xtx_spinand_table[] = {
SPINAND_INFO("XT26G01A",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0xE1),
NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(8, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&xt26g0xa_ooblayout,
xt26g0xa_ecc_get_status)),
SPINAND_INFO("XT26G02A",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0xE2),
NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
NAND_ECCREQ(8, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&xt26g0xa_ooblayout,
xt26g0xa_ecc_get_status)),
SPINAND_INFO("XT26G04A",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0xE3),
NAND_MEMORG(1, 2048, 64, 128, 2048, 40, 1, 1, 1),
NAND_ECCREQ(8, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
SPINAND_HAS_QE_BIT,
SPINAND_ECCINFO(&xt26g0xa_ooblayout,
xt26g0xa_ecc_get_status)),
};
static const struct spinand_manufacturer_ops xtx_spinand_manuf_ops = {
};
const struct spinand_manufacturer xtx_spinand_manufacturer = {
.id = SPINAND_MFR_XTX,
.name = "XTX",
.chips = xtx_spinand_table,
.nchips = ARRAY_SIZE(xtx_spinand_table),
.ops = &xtx_spinand_manuf_ops,
};
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