Commit 3181c0a6 authored by Frieder Schrempf's avatar Frieder Schrempf Committed by Jagan Teki

mtd: spinand: Add initial support for Winbond W25M02GV

Add support for the W25M02GV chip.
Signed-off-by: default avatarFrieder Schrempf <frieder.schrempf@exceet.de>
Signed-off-by: default avatarBoris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Acked-by: default avatarJagan Teki <jagan@openedev.com>
parent 883d8778
# SPDX-License-Identifier: GPL-2.0
spinand-objs := core.o micron.o
spinand-objs := core.o micron.o winbond.o
obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
......@@ -831,6 +831,7 @@ static const struct nand_ops spinand_ops = {
static const struct spinand_manufacturer *spinand_manufacturers[] = {
&micron_spinand_manufacturer,
&winbond_spinand_manufacturer,
};
static int spinand_manufacturer_detect(struct spinand_device *spinand)
......
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2017 exceet electronics GmbH
*
* Authors:
* Frieder Schrempf <frieder.schrempf@exceet.de>
* Boris Brezillon <boris.brezillon@bootlin.com>
*/
#ifndef __UBOOT__
#include <linux/device.h>
#include <linux/kernel.h>
#endif
#include <linux/mtd/spinand.h>
#define SPINAND_MFR_WINBOND 0xEF
#define WINBOND_CFG_BUF_READ BIT(3)
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 w25m02gv_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 3)
return -ERANGE;
region->offset = (16 * section) + 8;
region->length = 8;
return 0;
}
static int w25m02gv_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
if (section > 3)
return -ERANGE;
region->offset = (16 * section) + 2;
region->length = 6;
return 0;
}
static const struct mtd_ooblayout_ops w25m02gv_ooblayout = {
.ecc = w25m02gv_ooblayout_ecc,
.free = w25m02gv_ooblayout_free,
};
static int w25m02gv_select_target(struct spinand_device *spinand,
unsigned int target)
{
struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0xc2, 1),
SPI_MEM_OP_NO_ADDR,
SPI_MEM_OP_NO_DUMMY,
SPI_MEM_OP_DATA_OUT(1,
spinand->scratchbuf,
1));
*spinand->scratchbuf = target;
return spi_mem_exec_op(spinand->slave, &op);
}
static const struct spinand_info winbond_spinand_table[] = {
SPINAND_INFO("W25M02GV", 0xAB,
NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 2),
NAND_ECCREQ(1, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),
SPINAND_SELECT_TARGET(w25m02gv_select_target)),
};
/**
* winbond_spinand_detect - initialize device related part in spinand_device
* struct if it is a Winbond device.
* @spinand: SPI NAND device structure
*/
static int winbond_spinand_detect(struct spinand_device *spinand)
{
u8 *id = spinand->id.data;
int ret;
/*
* Winbond SPI NAND read ID need a dummy byte,
* so the first byte in raw_id is dummy.
*/
if (id[1] != SPINAND_MFR_WINBOND)
return 0;
ret = spinand_match_and_init(spinand, winbond_spinand_table,
ARRAY_SIZE(winbond_spinand_table), id[2]);
if (ret)
return ret;
return 1;
}
static int winbond_spinand_init(struct spinand_device *spinand)
{
struct nand_device *nand = spinand_to_nand(spinand);
unsigned int i;
/*
* Make sure all dies are in buffer read mode and not continuous read
* mode.
*/
for (i = 0; i < nand->memorg.ntargets; i++) {
spinand_select_target(spinand, i);
spinand_upd_cfg(spinand, WINBOND_CFG_BUF_READ,
WINBOND_CFG_BUF_READ);
}
return 0;
}
static const struct spinand_manufacturer_ops winbond_spinand_manuf_ops = {
.detect = winbond_spinand_detect,
.init = winbond_spinand_init,
};
const struct spinand_manufacturer winbond_spinand_manufacturer = {
.id = SPINAND_MFR_WINBOND,
.name = "Winbond",
.ops = &winbond_spinand_manuf_ops,
};
......@@ -202,6 +202,7 @@ struct spinand_manufacturer {
/* SPI NAND manufacturers */
extern const struct spinand_manufacturer micron_spinand_manufacturer;
extern const struct spinand_manufacturer winbond_spinand_manufacturer;
/**
* struct spinand_op_variants - SPI NAND operation variants
......
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