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mtd: spi-nand: Import Toshiba SPI-NAND support

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Linux has good support for Toshiba SPI-NAND, so lets import it.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Tested-by: Luka Kovacic <luka.kovacic@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Robert Marko 2020-03-03 20:25:40 +01:00 committed by Jagan Teki
parent 6f3b1f4a1d
commit 8912710484
4 changed files with 194 additions and 1 deletions
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2
drivers/mtd/nand/spi/Makefile
View file

@ -1,4 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
spinand-objs := core.o gigadevice.o macronix.o micron.o winbond.o
spinand-objs := core.o gigadevice.o macronix.o micron.o toshiba.o winbond.o
obj-$(CONFIG_MTD_SPI_NAND) += spinand.o

1
drivers/mtd/nand/spi/core.c
View file

@ -835,6 +835,7 @@ static const struct spinand_manufacturer *spinand_manufacturers[] = {
&gigadevice_spinand_manufacturer,
&macronix_spinand_manufacturer,
&micron_spinand_manufacturer,
&toshiba_spinand_manufacturer,
&winbond_spinand_manufacturer,
};

191
drivers/mtd/nand/spi/toshiba.c Normal file
View file

@ -0,0 +1,191 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018 exceet electronics GmbH
* Copyright (c) 2018 Kontron Electronics GmbH
*
* Author: Frieder Schrempf <frieder.schrempf@kontron.de>
*/
#ifndef __UBOOT__
#include <malloc.h>
#include <linux/device.h>
#include <linux/kernel.h>
#endif
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_TOSHIBA 0x98
#define TOSH_STATUS_ECC_HAS_BITFLIPS_T (3 << 4)
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(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(update_cache_variants,
SPINAND_PROG_LOAD(false, 0, NULL, 0));
static int tc58cxgxsx_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 0)
return -ERANGE;
region->offset = mtd->oobsize / 2;
region->length = mtd->oobsize / 2;
return 0;
}
static int tc58cxgxsx_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 0)
return -ERANGE;
/* 2 bytes reserved for BBM */
region->offset = 2;
region->length = (mtd->oobsize / 2) - 2;
return 0;
}
static const struct mtd_ooblayout_ops tc58cxgxsx_ooblayout = {
.ecc = tc58cxgxsx_ooblayout_ecc,
.rfree = tc58cxgxsx_ooblayout_free,
};
static int tc58cxgxsx_ecc_get_status(struct spinand_device *spinand,
u8 status)
{
struct nand_device *nand = spinand_to_nand(spinand);
u8 mbf = 0;
struct spi_mem_op op = SPINAND_GET_FEATURE_OP(0x30, &mbf);
switch (status & STATUS_ECC_MASK) {
case STATUS_ECC_NO_BITFLIPS:
return 0;
case STATUS_ECC_UNCOR_ERROR:
return -EBADMSG;
case STATUS_ECC_HAS_BITFLIPS:
case TOSH_STATUS_ECC_HAS_BITFLIPS_T:
/*
* 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 (spi_mem_exec_op(spinand->slave, &op))
return nand->eccreq.strength;
mbf >>= 4;
if (WARN_ON(mbf > nand->eccreq.strength || !mbf))
return nand->eccreq.strength;
return mbf;
default:
break;
}
return -EINVAL;
}
static const struct spinand_info toshiba_spinand_table[] = {
/* 3.3V 1Gb */
SPINAND_INFO("TC58CVG0S3", 0xC2,
NAND_MEMORG(1, 2048, 128, 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(&tc58cxgxsx_ooblayout,
tc58cxgxsx_ecc_get_status)),
/* 3.3V 2Gb */
SPINAND_INFO("TC58CVG1S3", 0xCB,
NAND_MEMORG(1, 2048, 128, 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(&tc58cxgxsx_ooblayout,
tc58cxgxsx_ecc_get_status)),
/* 3.3V 4Gb */
SPINAND_INFO("TC58CVG2S0", 0xCD,
NAND_MEMORG(1, 4096, 256, 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(&tc58cxgxsx_ooblayout,
tc58cxgxsx_ecc_get_status)),
/* 1.8V 1Gb */
SPINAND_INFO("TC58CYG0S3", 0xB2,
NAND_MEMORG(1, 2048, 128, 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(&tc58cxgxsx_ooblayout,
tc58cxgxsx_ecc_get_status)),
/* 1.8V 2Gb */
SPINAND_INFO("TC58CYG1S3", 0xBB,
NAND_MEMORG(1, 2048, 128, 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(&tc58cxgxsx_ooblayout,
tc58cxgxsx_ecc_get_status)),
/* 1.8V 4Gb */
SPINAND_INFO("TC58CYG2S0", 0xBD,
NAND_MEMORG(1, 4096, 256, 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(&tc58cxgxsx_ooblayout,
tc58cxgxsx_ecc_get_status)),
};
static int toshiba_spinand_detect(struct spinand_device *spinand)
{
u8 *id = spinand->id.data;
int ret;
/*
* Toshiba SPI NAND read ID needs a dummy byte,
* so the first byte in id is garbage.
*/
if (id[1] != SPINAND_MFR_TOSHIBA)
return 0;
ret = spinand_match_and_init(spinand, toshiba_spinand_table,
ARRAY_SIZE(toshiba_spinand_table),
id[2]);
if (ret)
return ret;
return 1;
}
static const struct spinand_manufacturer_ops toshiba_spinand_manuf_ops = {
.detect = toshiba_spinand_detect,
};
const struct spinand_manufacturer toshiba_spinand_manufacturer = {
.id = SPINAND_MFR_TOSHIBA,
.name = "Toshiba",
.ops = &toshiba_spinand_manuf_ops,
};

1
include/linux/mtd/spinand.h
View file

@ -204,6 +204,7 @@ struct spinand_manufacturer {
extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
extern const struct spinand_manufacturer macronix_spinand_manufacturer;
extern const struct spinand_manufacturer micron_spinand_manufacturer;
extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
extern const struct spinand_manufacturer winbond_spinand_manufacturer;
/**