151 lines
3.8 KiB
C
Executable file
151 lines
3.8 KiB
C
Executable file
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2018 Macronix
|
|
*
|
|
* Author: Boris Brezillon <boris.brezillon@bootlin.com>
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mtd/spinand.h>
|
|
|
|
#define SPINAND_MFR_MACRONIX 0xC2
|
|
#define MACRONIX_ECCSR_MASK 0x0F
|
|
|
|
static SPINAND_OP_VARIANTS(read_cache_variants,
|
|
SPINAND_PAGE_READ_FROM_CACHE_X4_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 mx35lfxge4ab_ooblayout_ecc(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *region)
|
|
{
|
|
return -ERANGE;
|
|
}
|
|
|
|
static int mx35lfxge4ab_ooblayout_free(struct mtd_info *mtd, int section,
|
|
struct mtd_oob_region *region)
|
|
{
|
|
if (section)
|
|
return -ERANGE;
|
|
|
|
region->offset = 2;
|
|
region->length = mtd->oobsize - 2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct mtd_ooblayout_ops mx35lfxge4ab_ooblayout = {
|
|
.ecc = mx35lfxge4ab_ooblayout_ecc,
|
|
.free = mx35lfxge4ab_ooblayout_free,
|
|
};
|
|
|
|
static int mx35lf1ge4ab_get_eccsr(struct spinand_device *spinand, u8 *eccsr)
|
|
{
|
|
struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0x7c, 1),
|
|
SPI_MEM_OP_NO_ADDR,
|
|
SPI_MEM_OP_DUMMY(1, 1),
|
|
SPI_MEM_OP_DATA_IN(1, eccsr, 1));
|
|
|
|
int ret = spi_mem_exec_op(spinand->spimem, &op);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*eccsr &= MACRONIX_ECCSR_MASK;
|
|
return 0;
|
|
}
|
|
|
|
static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand,
|
|
u8 status)
|
|
{
|
|
struct nand_device *nand = spinand_to_nand(spinand);
|
|
u8 eccsr;
|
|
|
|
switch (status & STATUS_ECC_MASK) {
|
|
case STATUS_ECC_NO_BITFLIPS:
|
|
return 0;
|
|
|
|
case STATUS_ECC_UNCOR_ERROR:
|
|
return -EBADMSG;
|
|
|
|
case STATUS_ECC_HAS_BITFLIPS:
|
|
/*
|
|
* Let's try to retrieve the real maximum number of bitflips
|
|
* in order to avoid forcing the wear-leveling layer to move
|
|
* data around if it's not necessary.
|
|
*/
|
|
if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr))
|
|
return nand->eccreq.strength;
|
|
|
|
if (WARN_ON(eccsr > nand->eccreq.strength || !eccsr))
|
|
return nand->eccreq.strength;
|
|
|
|
return eccsr;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct spinand_info macronix_spinand_table[] = {
|
|
SPINAND_INFO("MX35LF1GE4AB", 0x12,
|
|
NAND_MEMORG(1, 2048, 64, 64, 1024, 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(&mx35lfxge4ab_ooblayout,
|
|
mx35lf1ge4ab_ecc_get_status)),
|
|
SPINAND_INFO("MX35LF2GE4AB", 0x22,
|
|
NAND_MEMORG(1, 2048, 64, 64, 2048, 2, 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(&mx35lfxge4ab_ooblayout, NULL)),
|
|
};
|
|
|
|
static int macronix_spinand_detect(struct spinand_device *spinand)
|
|
{
|
|
u8 *id = spinand->id.data;
|
|
int ret;
|
|
|
|
/*
|
|
* Macronix SPI NAND read ID needs a dummy byte, so the first byte in
|
|
* raw_id is garbage.
|
|
*/
|
|
if (id[1] != SPINAND_MFR_MACRONIX)
|
|
return 0;
|
|
|
|
ret = spinand_match_and_init(spinand, macronix_spinand_table,
|
|
ARRAY_SIZE(macronix_spinand_table),
|
|
id[2]);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static const struct spinand_manufacturer_ops macronix_spinand_manuf_ops = {
|
|
.detect = macronix_spinand_detect,
|
|
};
|
|
|
|
const struct spinand_manufacturer macronix_spinand_manufacturer = {
|
|
.id = SPINAND_MFR_MACRONIX,
|
|
.name = "Macronix",
|
|
.ops = ¯onix_spinand_manuf_ops,
|
|
};
|