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@@ -0,0 +1,146 @@
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+From 49c8e854869d673df8452f24dfa8989cd0f615a8 Mon Sep 17 00:00:00 2001
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+From: Martin Kurbanov <[email protected]>
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+Date: Mon, 2 Oct 2023 17:04:58 +0300
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+Subject: [PATCH] mtd: spinand: add support for FORESEE F35SQA002G
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+
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+Add support for FORESEE F35SQA002G SPI NAND.
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+Datasheet:
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+ https://www.longsys.com/uploads/LM-00006FORESEEF35SQA002GDatasheet_1650183701.pdf
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+
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+Signed-off-by: Martin Kurbanov <[email protected]>
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+Signed-off-by: Miquel Raynal <[email protected]>
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+Link: https://lore.kernel.org/linux-mtd/[email protected]
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+---
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+ drivers/mtd/nand/spi/Makefile | 2 +-
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+ drivers/mtd/nand/spi/core.c | 1 +
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+ drivers/mtd/nand/spi/foresee.c | 95 ++++++++++++++++++++++++++++++++++
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+ include/linux/mtd/spinand.h | 1 +
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+ 4 files changed, 98 insertions(+), 1 deletion(-)
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+ create mode 100644 drivers/mtd/nand/spi/foresee.c
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+
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+--- a/drivers/mtd/nand/spi/Makefile
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++++ b/drivers/mtd/nand/spi/Makefile
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+@@ -1,4 +1,4 @@
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+ # SPDX-License-Identifier: GPL-2.0
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+-spinand-objs := core.o alliancememory.o ato.o esmt.o gigadevice.o macronix.o
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++spinand-objs := core.o alliancememory.o ato.o esmt.o foresee.o gigadevice.o macronix.o
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+ spinand-objs += micron.o paragon.o toshiba.o winbond.o xtx.o
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+ obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
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+--- a/drivers/mtd/nand/spi/core.c
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++++ b/drivers/mtd/nand/spi/core.c
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+@@ -940,6 +940,7 @@ static const struct spinand_manufacturer
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+ &alliancememory_spinand_manufacturer,
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+ &ato_spinand_manufacturer,
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+ &esmt_c8_spinand_manufacturer,
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++ &foresee_spinand_manufacturer,
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+ &gigadevice_spinand_manufacturer,
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+ ¯onix_spinand_manufacturer,
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+ µn_spinand_manufacturer,
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+--- /dev/null
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++++ b/drivers/mtd/nand/spi/foresee.c
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+@@ -0,0 +1,95 @@
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++// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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++/*
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++ * Copyright (c) 2023, SberDevices. All Rights Reserved.
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++ *
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++ * Author: Martin Kurbanov <[email protected]>
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++ */
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++
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++#include <linux/device.h>
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++#include <linux/kernel.h>
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++#include <linux/mtd/spinand.h>
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++
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++#define SPINAND_MFR_FORESEE 0xCD
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++
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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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++
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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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++
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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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++
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++static int f35sqa002g_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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++ return -ERANGE;
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++}
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++
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++static int f35sqa002g_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)
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++ return -ERANGE;
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++
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++ /* Reserve 2 bytes for the BBM. */
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++ region->offset = 2;
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++ region->length = 62;
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++
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++ return 0;
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++}
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++
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++static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = {
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++ .ecc = f35sqa002g_ooblayout_ecc,
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++ .free = f35sqa002g_ooblayout_free,
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++};
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++
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++static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status)
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++{
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++ struct nand_device *nand = spinand_to_nand(spinand);
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++
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++ switch (status & STATUS_ECC_MASK) {
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++ case STATUS_ECC_NO_BITFLIPS:
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++ return 0;
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++
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++ case STATUS_ECC_HAS_BITFLIPS:
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++ return nanddev_get_ecc_conf(nand)->strength;
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++
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++ default:
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++ break;
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++ }
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++
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++ /* More than 1-bit error was detected in one or more sectors and
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++ * cannot be corrected.
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++ */
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++ return -EBADMSG;
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++}
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++
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++static const struct spinand_info foresee_spinand_table[] = {
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++ SPINAND_INFO("F35SQA002G",
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++ SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72),
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++ NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
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++ NAND_ECCREQ(1, 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(&f35sqa002g_ooblayout,
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++ f35sqa002g_ecc_get_status)),
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++};
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++
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++static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = {
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++};
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++
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++const struct spinand_manufacturer foresee_spinand_manufacturer = {
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++ .id = SPINAND_MFR_FORESEE,
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++ .name = "FORESEE",
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++ .chips = foresee_spinand_table,
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++ .nchips = ARRAY_SIZE(foresee_spinand_table),
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++ .ops = &foresee_spinand_manuf_ops,
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++};
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+--- a/include/linux/mtd/spinand.h
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++++ b/include/linux/mtd/spinand.h
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+@@ -263,6 +263,7 @@ struct spinand_manufacturer {
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+ extern const struct spinand_manufacturer alliancememory_spinand_manufacturer;
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+ extern const struct spinand_manufacturer ato_spinand_manufacturer;
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+ extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
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++extern const struct spinand_manufacturer foresee_spinand_manufacturer;
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+ extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
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+ extern const struct spinand_manufacturer macronix_spinand_manufacturer;
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+ extern const struct spinand_manufacturer micron_spinand_manufacturer;
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Bohdan Chubuk