mediatek: add uboot

Signed-off-by: John Crispin <john@phrozen.org>

1 files changed, 8659 insertions, 0 deletions

diff --git a/package/boot/uboot-mediatek/patches/002-nand-add-spi-nand-driver.patch b/package/boot/uboot-mediatek/patches/002-nand-add-spi-nand-driver.patch
new file mode 100644
index 0000000000..dc3ebaf7af
--- /dev/null
+++ b/package/boot/uboot-mediatek/patches/002-nand-add-spi-nand-driver.patch
@@ -0,0 +1,8659 @@
+From de8b6cf615be20b25d0f3c817866de2c0d46a704 Mon Sep 17 00:00:00 2001
+From: Sam Shih <sam.shih@mediatek.com>
+Date: Mon, 20 Apr 2020 17:10:05 +0800
+Subject: [PATCH 1/3] nand: add spi nand driver
+
+Add spi nand driver support for mt7622 based on nfi controller
+
+Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
+---
+ drivers/mtd/Kconfig                           |    7 +
+ drivers/mtd/Makefile                          |    4 +
+ drivers/mtd/nand/raw/nand.c                   |    2 +
+ drivers/mtd/nandx/NOTICE                      |   52 +
+ drivers/mtd/nandx/Nandx.config                |   17 +
+ drivers/mtd/nandx/Nandx.mk                    |   91 ++
+ drivers/mtd/nandx/README                      |   31 +
+ drivers/mtd/nandx/core/Nandx.mk               |   38 +
+ drivers/mtd/nandx/core/core_io.c              |  735 +++++++++
+ drivers/mtd/nandx/core/core_io.h              |   39 +
+ drivers/mtd/nandx/core/nand/device_spi.c      |  200 +++
+ drivers/mtd/nandx/core/nand/device_spi.h      |  132 ++
+ drivers/mtd/nandx/core/nand/nand_spi.c        |  526 +++++++
+ drivers/mtd/nandx/core/nand/nand_spi.h        |   35 +
+ drivers/mtd/nandx/core/nand_base.c            |  304 ++++
+ drivers/mtd/nandx/core/nand_base.h            |   71 +
+ drivers/mtd/nandx/core/nand_chip.c            |  272 ++++
+ drivers/mtd/nandx/core/nand_chip.h            |  103 ++
+ drivers/mtd/nandx/core/nand_device.c          |  285 ++++
+ drivers/mtd/nandx/core/nand_device.h          |  608 ++++++++
+ drivers/mtd/nandx/core/nfi.h                  |   51 +
+ drivers/mtd/nandx/core/nfi/nfi_base.c         | 1357 +++++++++++++++++
+ drivers/mtd/nandx/core/nfi/nfi_base.h         |   95 ++
+ drivers/mtd/nandx/core/nfi/nfi_regs.h         |  114 ++
+ drivers/mtd/nandx/core/nfi/nfi_spi.c          |  689 +++++++++
+ drivers/mtd/nandx/core/nfi/nfi_spi.h          |   44 +
+ drivers/mtd/nandx/core/nfi/nfi_spi_regs.h     |   64 +
+ drivers/mtd/nandx/core/nfi/nfiecc.c           |  510 +++++++
+ drivers/mtd/nandx/core/nfi/nfiecc.h           |   90 ++
+ drivers/mtd/nandx/core/nfi/nfiecc_regs.h      |   51 +
+ drivers/mtd/nandx/driver/Nandx.mk             |   18 +
+ drivers/mtd/nandx/driver/bbt/bbt.c            |  408 +++++
+ drivers/mtd/nandx/driver/uboot/driver.c       |  574 +++++++
+ drivers/mtd/nandx/include/Nandx.mk            |   16 +
+ drivers/mtd/nandx/include/internal/bbt.h      |   62 +
+ .../mtd/nandx/include/internal/nandx_core.h   |  250 +++
+ .../mtd/nandx/include/internal/nandx_errno.h  |   40 +
+ .../mtd/nandx/include/internal/nandx_util.h   |  221 +++
+ drivers/mtd/nandx/include/uboot/nandx_os.h    |   78 +
+ include/configs/mt7622.h                      |   25 +
+ 40 files changed, 8309 insertions(+)
+ create mode 100644 drivers/mtd/nandx/NOTICE
+ create mode 100644 drivers/mtd/nandx/Nandx.config
+ create mode 100644 drivers/mtd/nandx/Nandx.mk
+ create mode 100644 drivers/mtd/nandx/README
+ create mode 100644 drivers/mtd/nandx/core/Nandx.mk
+ create mode 100644 drivers/mtd/nandx/core/core_io.c
+ create mode 100644 drivers/mtd/nandx/core/core_io.h
+ create mode 100644 drivers/mtd/nandx/core/nand/device_spi.c
+ create mode 100644 drivers/mtd/nandx/core/nand/device_spi.h
+ create mode 100644 drivers/mtd/nandx/core/nand/nand_spi.c
+ create mode 100644 drivers/mtd/nandx/core/nand/nand_spi.h
+ create mode 100644 drivers/mtd/nandx/core/nand_base.c
+ create mode 100644 drivers/mtd/nandx/core/nand_base.h
+ create mode 100644 drivers/mtd/nandx/core/nand_chip.c
+ create mode 100644 drivers/mtd/nandx/core/nand_chip.h
+ create mode 100644 drivers/mtd/nandx/core/nand_device.c
+ create mode 100644 drivers/mtd/nandx/core/nand_device.h
+ create mode 100644 drivers/mtd/nandx/core/nfi.h
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfi_base.c
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfi_base.h
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfi_regs.h
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfi_spi.c
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfi_spi.h
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfi_spi_regs.h
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfiecc.c
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfiecc.h
+ create mode 100644 drivers/mtd/nandx/core/nfi/nfiecc_regs.h
+ create mode 100644 drivers/mtd/nandx/driver/Nandx.mk
+ create mode 100644 drivers/mtd/nandx/driver/bbt/bbt.c
+ create mode 100644 drivers/mtd/nandx/driver/uboot/driver.c
+ create mode 100644 drivers/mtd/nandx/include/Nandx.mk
+ create mode 100644 drivers/mtd/nandx/include/internal/bbt.h
+ create mode 100644 drivers/mtd/nandx/include/internal/nandx_core.h
+ create mode 100644 drivers/mtd/nandx/include/internal/nandx_errno.h
+ create mode 100644 drivers/mtd/nandx/include/internal/nandx_util.h
+ create mode 100644 drivers/mtd/nandx/include/uboot/nandx_os.h
+
+diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
+index 5e7571cf3d..34a59b44b9 100644
+--- a/drivers/mtd/Kconfig
++++ b/drivers/mtd/Kconfig
+@@ -101,6 +101,13 @@ config HBMC_AM654
+ 	 This is the driver for HyperBus controller on TI's AM65x and
+ 	 other SoCs
+ 
++config MTK_SPI_NAND
++	tristate "Mediatek SPI Nand"
++	depends on DM_MTD
++	help
++	  This option will support SPI Nand device via Mediatek
++	  NFI controller.
++
+ source "drivers/mtd/nand/Kconfig"
+ 
+ source "drivers/mtd/spi/Kconfig"
+diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
+index 318788c5e2..1df1031b23 100644
+--- a/drivers/mtd/Makefile
++++ b/drivers/mtd/Makefile
+@@ -41,3 +41,7 @@ obj-$(CONFIG_$(SPL_TPL_)SPI_FLASH_SUPPORT) += spi/
+ obj-$(CONFIG_SPL_UBI) += ubispl/
+ 
+ endif
++
++ifeq ($(CONFIG_MTK_SPI_NAND), y)
++include $(srctree)/drivers/mtd/nandx/Nandx.mk
++endif
+diff --git a/drivers/mtd/nand/raw/nand.c b/drivers/mtd/nand/raw/nand.c
+index 026419e4e6..4be0c7d8f3 100644
+--- a/drivers/mtd/nand/raw/nand.c
++++ b/drivers/mtd/nand/raw/nand.c
+@@ -91,8 +91,10 @@ static void nand_init_chip(int i)
+ 	if (board_nand_init(nand))
+ 		return;
+ 
++#ifndef CONFIG_MTK_SPI_NAND
+ 	if (nand_scan(mtd, maxchips))
+ 		return;
++#endif
+ 
+ 	nand_register(i, mtd);
+ }
+diff --git a/drivers/mtd/nandx/NOTICE b/drivers/mtd/nandx/NOTICE
+new file mode 100644
+index 0000000000..1a06ca3867
+--- /dev/null
++++ b/drivers/mtd/nandx/NOTICE
+@@ -0,0 +1,52 @@
++
++/*
++ * Nandx - Mediatek Common Nand Driver
++ * Copyright (C) 2017 MediaTek Inc.
++ *
++ * Nandx is dual licensed: you can use it either under the terms of
++ * the GPL, or the BSD license, at your option.
++ *
++ *  a) This program is free software; you can redistribute it and/or modify
++ *     it under the terms of the GNU General Public License version 2 as
++ *     published by the Free Software Foundation.
++ *
++ *     This library is distributed in the hope that it will be useful,
++ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ *     GNU General Public License for more details.
++ *
++ *     This program is distributed in the hope that it will be useful,
++ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
++ *     See http://www.gnu.org/licenses/gpl-2.0.html for more details.
++ *
++ * Alternatively,
++ *
++ *  b) Redistribution and use in source and binary forms, with or
++ *     without modification, are permitted provided that the following
++ *     conditions are met:
++ *
++ *     1. Redistributions of source code must retain the above
++ *        copyright notice, this list of conditions and the following
++ *        disclaimer.
++ *     2. Redistributions in binary form must reproduce the above
++ *        copyright notice, this list of conditions and the following
++ *        disclaimer in the documentation and/or other materials
++ *        provided with the distribution.
++ *
++ *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
++ *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
++ *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
++ *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
++ *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
++ *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
++ *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
++ *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
++ *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
++ *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
++ *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
++ *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
++ *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
++ */
++
++####################################################################################################
+\ No newline at end of file
+diff --git a/drivers/mtd/nandx/Nandx.config b/drivers/mtd/nandx/Nandx.config
+new file mode 100644
+index 0000000000..35705ee28d
+--- /dev/null
++++ b/drivers/mtd/nandx/Nandx.config
+@@ -0,0 +1,17 @@
++NANDX_SIMULATOR_SUPPORT := n
++NANDX_CTP_SUPPORT := n
++NANDX_DA_SUPPORT := n
++NANDX_PRELOADER_SUPPORT := n
++NANDX_LK_SUPPORT := n
++NANDX_KERNEL_SUPPORT := n
++NANDX_BROM_SUPPORT := n
++NANDX_UBOOT_SUPPORT := y
++NANDX_BBT_SUPPORT := y
++
++NANDX_NAND_SPI := y
++NANDX_NAND_SLC := n
++NANDX_NAND_MLC := n
++NANDX_NAND_TLC := n
++NANDX_NFI_BASE := y
++NANDX_NFI_ECC := y
++NANDX_NFI_SPI := y
+diff --git a/drivers/mtd/nandx/Nandx.mk b/drivers/mtd/nandx/Nandx.mk
+new file mode 100644
+index 0000000000..f5a6f2a628
+--- /dev/null
++++ b/drivers/mtd/nandx/Nandx.mk
+@@ -0,0 +1,91 @@
++#
++# Copyright (C) 2017 MediaTek Inc.
++# Licensed under either
++#     BSD Licence, (see NOTICE for more details)
++#     GNU General Public License, version 2.0, (see NOTICE for more details)
++#
++
++nandx_dir := $(shell dirname $(lastword $(MAKEFILE_LIST)))
++include $(nandx_dir)/Nandx.config
++
++ifeq ($(NANDX_SIMULATOR_SUPPORT), y)
++sim-obj :=
++sim-inc :=
++nandx-obj := sim-obj
++nandx-prefix := .
++nandx-postfix := %.o
++sim-inc += -I$(nandx-prefix)/include/internal
++sim-inc += -I$(nandx-prefix)/include/simulator
++endif
++
++ifeq ($(NANDX_CTP_SUPPORT), y)
++nandx-obj := C_SRC_FILES
++nandx-prefix := $(nandx_dir)
++nandx-postfix := %.c
++INC_DIRS += $(nandx_dir)/include/internal
++INC_DIRS += $(nandx_dir)/include/ctp
++endif
++
++ifeq ($(NANDX_DA_SUPPORT), y)
++nandx-obj := obj-y
++nandx-prefix := $(nandx_dir)
++nandx-postfix := %.o
++INCLUDE_PATH += $(TOPDIR)/platform/$(CODE_BASE)/dev/nand/nandx/include/internal
++INCLUDE_PATH += $(TOPDIR)/platform/$(CODE_BASE)/dev/nand/nandx/include/da
++endif
++
++ifeq ($(NANDX_PRELOADER_SUPPORT), y)
++nandx-obj := MOD_SRC
++nandx-prefix := $(nandx_dir)
++nandx-postfix := %.c
++C_OPTION += -I$(MTK_PATH_PLATFORM)/src/drivers/nandx/include/internal
++C_OPTION += -I$(MTK_PATH_PLATFORM)/src/drivers/nandx/include/preloader
++endif
++
++ifeq ($(NANDX_LK_SUPPORT), y)
++nandx-obj := MODULE_SRCS
++nandx-prefix := $(nandx_dir)
++nandx-postfix := %.c
++GLOBAL_INCLUDES += $(nandx_dir)/include/internal
++GLOBAL_INCLUDES += $(nandx_dir)/include/lk
++endif
++
++ifeq ($(NANDX_KERNEL_SUPPORT), y)
++nandx-obj := obj-y
++nandx-prefix := nandx
++nandx-postfix := %.o
++ccflags-y += -I$(nandx_dir)/include/internal
++ccflags-y += -I$(nandx_dir)/include/kernel
++endif
++
++ifeq ($(NANDX_UBOOT_SUPPORT), y)
++nandx-obj := obj-y
++nandx-prefix := nandx
++nandx-postfix := %.o
++ccflags-y += -I$(nandx_dir)/include/internal
++ccflags-y += -I$(nandx_dir)/include/uboot
++endif
++
++nandx-y :=
++include $(nandx_dir)/core/Nandx.mk
++nandx-target := $(nandx-prefix)/core/$(nandx-postfix)
++$(nandx-obj) += $(patsubst %.c, $(nandx-target), $(nandx-y))
++
++
++nandx-y :=
++include $(nandx_dir)/driver/Nandx.mk
++nandx-target := $(nandx-prefix)/driver/$(nandx-postfix)
++$(nandx-obj) += $(patsubst %.c, $(nandx-target), $(nandx-y))
++
++ifeq ($(NANDX_SIMULATOR_SUPPORT), y)
++cc := gcc
++CFLAGS += $(sim-inc)
++
++.PHONY:nandx
++nandx: $(sim-obj)
++	$(cc)  $(sim-obj) -o nandx
++
++.PHONY:clean
++clean:
++	rm -rf $(sim-obj) nandx
++endif
+diff --git a/drivers/mtd/nandx/README b/drivers/mtd/nandx/README
+new file mode 100644
+index 0000000000..0feaeaeb88
+--- /dev/null
++++ b/drivers/mtd/nandx/README
+@@ -0,0 +1,31 @@
++
++                          NAND2.0
++                ===============================
++
++    NAND2.0 is a common nand driver which designed for accessing
++different type of NANDs(SLC, SPI-NAND, MLC, TLC) on various OS. This
++driver can work on mostly SoCs of Mediatek.
++
++    Although there already has a common nand driver, it doesn't cover
++SPI-NAND, and not match our IC-Verification's reqirement. We need
++a driver that can be exten or cut easily.
++
++    This driver is base on NANDX & SLC. We try to refactor structures,
++and make them inheritable. We also refactor some operations' flow
++principally for adding SPI-NAND support.
++
++    This driver's architecture is like:
++
++          Driver @LK/Uboot/DA...           |IC verify/other purposes
++    ----------------------------------------------------------------
++      partition       |        BBM         |
++    -------------------------------------- |       extend_core
++             nandx_core/core_io            |
++    ----------------------------------------------------------------
++             nand_chip/nand_base           |
++    -------------------------------------- |        extend_nfi
++      nand_device     |    nfi/nfi_base    |
++
++    Any block of above graph can be extended at your will, if you
++want add new feature into this code, please make sure that your code
++would follow the framework, and we will be appreciated about it.
+diff --git a/drivers/mtd/nandx/core/Nandx.mk b/drivers/mtd/nandx/core/Nandx.mk
+new file mode 100644
+index 0000000000..7a5661c044
+--- /dev/null
++++ b/drivers/mtd/nandx/core/Nandx.mk
+@@ -0,0 +1,38 @@
++#
++# Copyright (C) 2017 MediaTek Inc.
++# Licensed under either
++#     BSD Licence, (see NOTICE for more details)
++#     GNU General Public License, version 2.0, (see NOTICE for more details)
++#
++
++nandx-y += nand_device.c
++nandx-y += nand_base.c
++nandx-y += nand_chip.c
++nandx-y += core_io.c
++
++nandx-header-y += nand_device.h
++nandx-header-y += nand_base.h
++nandx-header-y += nand_chip.h
++nandx-header-y += core_io.h
++nandx-header-y += nfi.h
++
++nandx-$(NANDX_NAND_SPI) += nand/device_spi.c
++nandx-$(NANDX_NAND_SPI) += nand/nand_spi.c
++nandx-$(NANDX_NAND_SLC) += nand/device_slc.c
++nandx-$(NANDX_NAND_SLC) += nand/nand_slc.c
++
++nandx-header-$(NANDX_NAND_SPI) += nand/device_spi.h
++nandx-header-$(NANDX_NAND_SPI) += nand/nand_spi.h
++nandx-header-$(NANDX_NAND_SLC) += nand/device_slc.h
++nandx-header-$(NANDX_NAND_SLC) += nand/nand_slc.h
++
++nandx-$(NANDX_NFI_BASE) += nfi/nfi_base.c
++nandx-$(NANDX_NFI_ECC) += nfi/nfiecc.c
++nandx-$(NANDX_NFI_SPI) += nfi/nfi_spi.c
++
++nandx-header-$(NANDX_NFI_BASE) += nfi/nfi_base.h
++nandx-header-$(NANDX_NFI_BASE) += nfi/nfi_regs.h
++nandx-header-$(NANDX_NFI_ECC) += nfi/nfiecc.h
++nandx-header-$(NANDX_NFI_ECC) += nfi/nfiecc_regs.h
++nandx-header-$(NANDX_NFI_SPI) += nfi/nfi_spi.h
++nandx-header-$(NANDX_NFI_SPI) += nfi/nfi_spi_regs.h
+diff --git a/drivers/mtd/nandx/core/core_io.c b/drivers/mtd/nandx/core/core_io.c
+new file mode 100644
+index 0000000000..716eeed38d
+--- /dev/null
++++ b/drivers/mtd/nandx/core/core_io.c
+@@ -0,0 +1,735 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++/*NOTE: switch cache/multi*/
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "nand_chip.h"
++#include "core_io.h"
++
++static struct nandx_desc *g_nandx;
++
++static inline bool is_sector_align(u64 val)
++{
++	return reminder(val, g_nandx->chip->sector_size) ? false : true;
++}
++
++static inline bool is_page_align(u64 val)
++{
++	return reminder(val, g_nandx->chip->page_size) ? false : true;
++}
++
++static inline bool is_block_align(u64 val)
++{
++	return reminder(val, g_nandx->chip->block_size) ? false : true;
++}
++
++static inline u32 page_sectors(void)
++{
++	return div_down(g_nandx->chip->page_size, g_nandx->chip->sector_size);
++}
++
++static inline u32 sector_oob(void)
++{
++	return div_down(g_nandx->chip->oob_size, page_sectors());
++}
++
++static inline u32 sector_padded_size(void)
++{
++	return g_nandx->chip->sector_size + g_nandx->chip->sector_spare_size;
++}
++
++static inline u32 page_padded_size(void)
++{
++	return page_sectors() * sector_padded_size();
++}
++
++static inline u32 offset_to_padded_col(u64 offset)
++{
++	struct nandx_desc *nandx = g_nandx;
++	u32 col, sectors;
++
++	col = reminder(offset, nandx->chip->page_size);
++	sectors = div_down(col, nandx->chip->sector_size);
++
++	return col + sectors * nandx->chip->sector_spare_size;
++}
++
++static inline u32 offset_to_row(u64 offset)
++{
++	return div_down(offset, g_nandx->chip->page_size);
++}
++
++static inline u32 offset_to_col(u64 offset)
++{
++	return reminder(offset, g_nandx->chip->page_size);
++}
++
++static inline u32 oob_upper_size(void)
++{
++	return g_nandx->ecc_en ? g_nandx->chip->oob_size :
++	       g_nandx->chip->sector_spare_size * page_sectors();
++}
++
++static inline bool is_upper_oob_align(u64 val)
++{
++	return reminder(val, oob_upper_size()) ? false : true;
++}
++
++#define prepare_op(_op, _row, _col, _len, _data, _oob) \
++	do { \
++		(_op).row = (_row); \
++		(_op).col = (_col); \
++		(_op).len = (_len); \
++		(_op).data = (_data); \
++		(_op).oob = (_oob); \
++	} while (0)
++
++static int operation_multi(enum nandx_op_mode mode, u8 *data, u8 *oob,
++			   u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++	u32 row = offset_to_row(offset);
++	u32 col = offset_to_padded_col(offset);
++
++	if (nandx->mode == NANDX_IDLE) {
++		nandx->mode = mode;
++		nandx->ops_current = 0;
++	} else if (nandx->mode != mode) {
++		pr_info("forbid mixed operations.\n");
++		return -EOPNOTSUPP;
++	}
++
++	prepare_op(nandx->ops[nandx->ops_current], row, col, len, data, oob);
++	nandx->ops_current++;
++
++	if (nandx->ops_current == nandx->ops_multi_len)
++		return nandx_sync();
++
++	return nandx->ops_multi_len - nandx->ops_current;
++}
++
++static int operation_sequent(enum nandx_op_mode mode, u8 *data, u8 *oob,
++			     u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++	struct nand_chip *chip = nandx->chip;
++	u32 row = offset_to_row(offset);
++	func_chip_ops chip_ops;
++	u8 *ref_data = data, *ref_oob = oob;
++	int align, ops, row_step;
++	int i, rem;
++
++	align = data ? chip->page_size : oob_upper_size();
++	ops = data ? div_down(len, align) : div_down(len, oob_upper_size());
++	row_step = 1;
++
++	switch (mode) {
++	case NANDX_ERASE:
++		chip_ops = chip->erase_block;
++		align = chip->block_size;
++		ops = div_down(len, align);
++		row_step = chip->block_pages;
++		break;
++
++	case NANDX_READ:
++		chip_ops = chip->read_page;
++		break;
++
++	case NANDX_WRITE:
++		chip_ops = chip->write_page;
++		break;
++
++	default:
++		return -EINVAL;
++	}
++
++	if (!data) {
++		ref_data = nandx->head_buf;
++		memset(ref_data, 0xff, chip->page_size);
++	}
++
++	if (!oob) {
++		ref_oob = nandx->head_buf + chip->page_size;
++		memset(ref_oob, 0xff, oob_upper_size());
++	}
++
++	for (i = 0; i < ops; i++) {
++		prepare_op(nandx->ops[nandx->ops_current],
++			   row + i * row_step, 0, align, ref_data, ref_oob);
++		nandx->ops_current++;
++		/* if data or oob is null, nandx->head_buf or
++		 * nandx->head_buf + chip->page_size should not been used
++		 * so, here it is safe to use the buf.
++		 */
++		ref_data = data ? ref_data + chip->page_size : nandx->head_buf;
++		ref_oob = oob ? ref_oob + oob_upper_size() :
++			  nandx->head_buf + chip->page_size;
++	}
++
++	if (nandx->mode == NANDX_WRITE) {
++		rem = reminder(nandx->ops_current, nandx->min_write_pages);
++		if (rem)
++			return nandx->min_write_pages - rem;
++	}
++
++	nandx->ops_current = 0;
++	return chip_ops(chip, nandx->ops, ops);
++}
++
++static int read_pages(u8 *data, u8 *oob, u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++	struct nand_chip *chip = nandx->chip;
++	struct nandx_split64 split = {0};
++	u8 *ref_data = data, *ref_oob;
++	u32 row, col;
++	int ret = 0, i, ops;
++	u32 head_offset = 0;
++	u64 val;
++
++	if (!data)
++		return operation_sequent(NANDX_READ, NULL, oob, offset, len);
++
++	ref_oob = oob ? oob : nandx->head_buf + chip->page_size;
++
++	nandx_split(&split, offset, len, val, chip->page_size);
++
++	if (split.head_len) {
++		row = offset_to_row(split.head);
++		col = offset_to_col(split.head);
++		prepare_op(nandx->ops[nandx->ops_current], row, 0,
++			   chip->page_size,
++			   nandx->head_buf, ref_oob);
++		nandx->ops_current++;
++
++		head_offset = col;
++
++		ref_data += split.head_len;
++		ref_oob = oob ? ref_oob + oob_upper_size() :
++			  nandx->head_buf + chip->page_size;
++	}
++
++	if (split.body_len) {
++		ops = div_down(split.body_len, chip->page_size);
++		row = offset_to_row(split.body);
++		for (i = 0; i < ops; i++) {
++			prepare_op(nandx->ops[nandx->ops_current],
++				   row + i, 0, chip->page_size,
++				   ref_data, ref_oob);
++			nandx->ops_current++;
++			ref_data += chip->page_size;
++			ref_oob = oob ? ref_oob + oob_upper_size() :
++				  nandx->head_buf + chip->page_size;
++		}
++	}
++
++	if (split.tail_len) {
++		row = offset_to_row(split.tail);
++		prepare_op(nandx->ops[nandx->ops_current], row, 0,
++			   chip->page_size, nandx->tail_buf, ref_oob);
++		nandx->ops_current++;
++	}
++
++	ret = chip->read_page(chip, nandx->ops, nandx->ops_current);
++
++	if (split.head_len)
++		memcpy(data, nandx->head_buf + head_offset, split.head_len);
++	if (split.tail_len)
++		memcpy(ref_data, nandx->tail_buf, split.tail_len);
++
++	nandx->ops_current = 0;
++	return ret;
++}
++
++int nandx_read(u8 *data, u8 *oob, u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++
++	if (!len || len > nandx->info.total_size)
++		return -EINVAL;
++	if (div_up(len, nandx->chip->page_size) > nandx->ops_len)
++		return -EINVAL;
++	if (!data && !oob)
++		return -EINVAL;
++	/**
++	 * as design, oob not support partial read
++	 * and, the length of oob buf should be oob size aligned
++	 */
++	if (!data && !is_upper_oob_align(len))
++		return -EINVAL;
++
++	if (g_nandx->multi_en) {
++		/* as design, there only 2 buf for partial read,
++		 * if partial read allowed for multi read,
++		 * there are not enough buf
++		 */
++		if (!is_sector_align(offset))
++			return -EINVAL;
++		if (data && !is_sector_align(len))
++			return -EINVAL;
++		return operation_multi(NANDX_READ, data, oob, offset, len);
++	}
++
++	nandx->ops_current = 0;
++	nandx->mode = NANDX_IDLE;
++	return read_pages(data, oob, offset, len);
++}
++
++static int write_pages(u8 *data, u8 *oob, u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++	struct nand_chip *chip = nandx->chip;
++	struct nandx_split64 split = {0};
++	int ret, rem, i, ops;
++	u32 row, col;
++	u8 *ref_oob = oob;
++	u64 val;
++
++	nandx->mode = NANDX_WRITE;
++
++	if (!data)
++		return operation_sequent(NANDX_WRITE, NULL, oob, offset, len);
++
++	if (!oob) {
++		ref_oob = nandx->head_buf + chip->page_size;
++		memset(ref_oob, 0xff, oob_upper_size());
++	}
++
++	nandx_split(&split, offset, len, val, chip->page_size);
++
++	/*NOTE: slc can support sector write, here copy too many data.*/
++	if (split.head_len) {
++		row = offset_to_row(split.head);
++		col = offset_to_col(split.head);
++		memset(nandx->head_buf, 0xff, page_padded_size());
++		memcpy(nandx->head_buf + col, data, split.head_len);
++		prepare_op(nandx->ops[nandx->ops_current], row, 0,
++			   chip->page_size, nandx->head_buf, ref_oob);
++		nandx->ops_current++;
++
++		data += split.head_len;
++		ref_oob = oob ? ref_oob + oob_upper_size() :
++			  nandx->head_buf + chip->page_size;
++	}
++
++	if (split.body_len) {
++		row = offset_to_row(split.body);
++		ops = div_down(split.body_len, chip->page_size);
++		for (i = 0; i < ops; i++) {
++			prepare_op(nandx->ops[nandx->ops_current],
++				   row + i, 0, chip->page_size, data, ref_oob);
++			nandx->ops_current++;
++			data += chip->page_size;
++			ref_oob = oob ? ref_oob + oob_upper_size() :
++				  nandx->head_buf + chip->page_size;
++		}
++	}
++
++	if (split.tail_len) {
++		row = offset_to_row(split.tail);
++		memset(nandx->tail_buf, 0xff, page_padded_size());
++		memcpy(nandx->tail_buf, data, split.tail_len);
++		prepare_op(nandx->ops[nandx->ops_current], row, 0,
++			   chip->page_size, nandx->tail_buf, ref_oob);
++		nandx->ops_current++;
++	}
++
++	rem = reminder(nandx->ops_current, nandx->min_write_pages);
++	if (rem)
++		return nandx->min_write_pages - rem;
++
++	ret = chip->write_page(chip, nandx->ops, nandx->ops_current);
++
++	nandx->ops_current = 0;
++	nandx->mode = NANDX_IDLE;
++	return ret;
++}
++
++int nandx_write(u8 *data, u8 *oob, u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++
++	if (!len || len > nandx->info.total_size)
++		return -EINVAL;
++	if (div_up(len, nandx->chip->page_size) > nandx->ops_len)
++		return -EINVAL;
++	if (!data && !oob)
++		return -EINVAL;
++	if (!data && !is_upper_oob_align(len))
++		return -EINVAL;
++
++	if (nandx->multi_en) {
++		if (!is_page_align(offset))
++			return -EINVAL;
++		if (data && !is_page_align(len))
++			return -EINVAL;
++
++		return operation_multi(NANDX_WRITE, data, oob, offset, len);
++	}
++
++	return write_pages(data, oob, offset, len);
++}
++
++int nandx_erase(u64 offset, size_t len)
++{
++	struct nandx_desc *nandx = g_nandx;
++
++	if (!len || len > nandx->info.total_size)
++		return -EINVAL;
++	if (div_down(len, nandx->chip->block_size) > nandx->ops_len)
++		return -EINVAL;
++	if (!is_block_align(offset) || !is_block_align(len))
++		return -EINVAL;
++
++	if (g_nandx->multi_en)
++		return operation_multi(NANDX_ERASE, NULL, NULL, offset, len);
++
++	nandx->ops_current = 0;
++	nandx->mode = NANDX_IDLE;
++	return operation_sequent(NANDX_ERASE, NULL, NULL, offset, len);
++}
++
++int nandx_sync(void)
++{
++	struct nandx_desc *nandx = g_nandx;
++	struct nand_chip *chip = nandx->chip;
++	func_chip_ops chip_ops;
++	int ret, i, rem;
++
++	if (!nandx->ops_current)
++		return 0;
++
++	rem = reminder(nandx->ops_current, nandx->ops_multi_len);
++	if (nandx->multi_en && rem) {
++		ret = -EIO;
++		goto error;
++	}
++
++	switch (nandx->mode) {
++	case NANDX_IDLE:
++		return 0;
++	case NANDX_ERASE:
++		chip_ops = chip->erase_block;
++		break;
++	case NANDX_READ:
++		chip_ops = chip->read_page;
++		break;
++	case NANDX_WRITE:
++		chip_ops = chip->write_page;
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	rem = reminder(nandx->ops_current, nandx->min_write_pages);
++	if (!nandx->multi_en && nandx->mode == NANDX_WRITE && rem) {
++		/* in one process of program, only allow 2 pages to do partial
++		 * write, here we supposed 1st buf would be used, and 2nd
++		 * buf should be not used.
++		 */
++		memset(nandx->tail_buf, 0xff,
++		       chip->page_size + oob_upper_size());
++		for (i = 0; i < rem; i++) {
++			prepare_op(nandx->ops[nandx->ops_current],
++				   nandx->ops[nandx->ops_current - 1].row + 1,
++				   0, chip->page_size, nandx->tail_buf,
++				   nandx->tail_buf + chip->page_size);
++			nandx->ops_current++;
++		}
++	}
++
++	ret = chip_ops(nandx->chip, nandx->ops, nandx->ops_current);
++
++error:
++	nandx->mode = NANDX_IDLE;
++	nandx->ops_current = 0;
++
++	return ret;
++}
++
++int nandx_ioctl(int cmd, void *arg)
++{
++	struct nandx_desc *nandx = g_nandx;
++	struct nand_chip *chip = nandx->chip;
++	int ret = 0;
++
++	switch (cmd) {
++	case CORE_CTRL_NAND_INFO:
++		*(struct nandx_info *)arg = nandx->info;
++		break;
++
++	case CHIP_CTRL_OPS_MULTI:
++		ret = chip->chip_ctrl(chip, cmd, arg);
++		if (!ret)
++			nandx->multi_en = *(bool *)arg;
++		break;
++
++	case NFI_CTRL_ECC:
++		ret = chip->chip_ctrl(chip, cmd, arg);
++		if (!ret)
++			nandx->ecc_en = *(bool *)arg;
++		break;
++
++	default:
++		ret = chip->chip_ctrl(chip, cmd, arg);
++		break;
++	}
++
++	return ret;
++}
++
++bool nandx_is_bad_block(u64 offset)
++{
++	struct nandx_desc *nandx = g_nandx;
++
++	prepare_op(nandx->ops[0], offset_to_row(offset), 0,
++		   nandx->chip->page_size, nandx->head_buf,
++		   nandx->head_buf + nandx->chip->page_size);
++
++	return nandx->chip->is_bad_block(nandx->chip, nandx->ops, 1);
++}
++
++int nandx_suspend(void)
++{
++	return g_nandx->chip->suspend(g_nandx->chip);
++}
++
++int nandx_resume(void)
++{
++	return g_nandx->chip->resume(g_nandx->chip);
++}
++
++int nandx_init(struct nfi_resource *res)
++{
++	struct nand_chip *chip;
++	struct nandx_desc *nandx;
++	int ret = 0;
++
++	if (!res)
++		return -EINVAL;
++
++	chip = nand_chip_init(res);
++	if (!chip) {
++		pr_info("nand chip init fail.\n");
++		return -EFAULT;
++	}
++
++	nandx = (struct nandx_desc *)mem_alloc(1, sizeof(struct nandx_desc));
++	if (!nandx)
++		return -ENOMEM;
++
++	g_nandx = nandx;
++
++	nandx->chip = chip;
++	nandx->min_write_pages = chip->min_program_pages;
++	nandx->ops_multi_len = nandx->min_write_pages * chip->plane_num;
++	nandx->ops_len = chip->block_pages * chip->plane_num;
++	nandx->ops = mem_alloc(1, sizeof(struct nand_ops) * nandx->ops_len);
++	if (!nandx->ops) {
++		ret = -ENOMEM;
++		goto ops_error;
++	}
++
++#if NANDX_BULK_IO_USE_DRAM
++	nandx->head_buf = NANDX_CORE_BUF_ADDR;
++#else
++	nandx->head_buf = mem_alloc(2, page_padded_size());
++#endif
++	if (!nandx->head_buf) {
++		ret = -ENOMEM;
++		goto buf_error;
++	}
++	nandx->tail_buf = nandx->head_buf + page_padded_size();
++	memset(nandx->head_buf, 0xff, 2 * page_padded_size());
++	nandx->multi_en = false;
++	nandx->ecc_en = false;
++	nandx->ops_current = 0;
++	nandx->mode = NANDX_IDLE;
++
++	nandx->info.max_io_count = nandx->ops_len;
++	nandx->info.min_write_pages = nandx->min_write_pages;
++	nandx->info.plane_num = chip->plane_num;
++	nandx->info.oob_size = chip->oob_size;
++	nandx->info.page_parity_size = chip->sector_spare_size * page_sectors();
++	nandx->info.page_size = chip->page_size;
++	nandx->info.block_size = chip->block_size;
++	nandx->info.total_size = chip->block_size * chip->block_num;
++	nandx->info.fdm_ecc_size = chip->fdm_ecc_size;
++	nandx->info.fdm_reg_size = chip->fdm_reg_size;
++	nandx->info.ecc_strength = chip->ecc_strength;
++	nandx->info.sector_size = chip->sector_size;
++
++	return 0;
++
++buf_error:
++#if !NANDX_BULK_IO_USE_DRAM
++	mem_free(nandx->head_buf);
++#endif
++ops_error:
++	mem_free(nandx);
++
++	return ret;
++}
++
++void nandx_exit(void)
++{
++	nand_chip_exit(g_nandx->chip);
++#if !NANDX_BULK_IO_USE_DRAM
++	mem_free(g_nandx->head_buf);
++#endif
++	mem_free(g_nandx->ops);
++	mem_free(g_nandx);
++}
++
++#ifdef NANDX_UNIT_TEST
++static void dump_buf(u8 *buf, u32 len)
++{
++	u32 i;
++
++	pr_info("dump buf@0x%X start", (u32)buf);
++	for (i = 0; i < len; i++) {
++		if (!reminder(i, 16))
++			pr_info("\n0x");
++		pr_info("%x ", buf[i]);
++	}
++	pr_info("\ndump buf done.\n");
++}
++
++int nandx_unit_test(u64 offset, size_t len)
++{
++	u8 *src_buf, *dst_buf;
++	u32 i, j;
++	int ret;
++
++	if (!len || len > g_nandx->chip->block_size)
++		return -EINVAL;
++
++#if NANDX_BULK_IO_USE_DRAM
++	src_buf = NANDX_UT_SRC_ADDR;
++	dst_buf = NANDX_UT_DST_ADDR;
++
++#else
++	src_buf = mem_alloc(1, g_nandx->chip->page_size);
++	if (!src_buf)
++		return -ENOMEM;
++	dst_buf = mem_alloc(1, g_nandx->chip->page_size);
++	if (!dst_buf) {
++		mem_free(src_buf);
++		return -ENOMEM;
++	}
++#endif
++
++	pr_info("%s: src_buf address 0x%x, dst_buf address 0x%x\n",
++		 __func__, (int)((unsigned long)src_buf),
++		 (int)((unsigned long)dst_buf));
++
++	memset(dst_buf, 0, g_nandx->chip->page_size);
++	pr_info("read page 0 data...!\n");
++	ret = nandx_read(dst_buf, NULL, 0, g_nandx->chip->page_size);
++	if (ret < 0) {
++		pr_info("read fail with ret %d\n", ret);
++	} else {
++		pr_info("read page success!\n");
++	}
++
++	for (i = 0; i < g_nandx->chip->page_size; i++) {
++		src_buf[i] = 0x5a;
++	}
++
++	ret = nandx_erase(offset, g_nandx->chip->block_size);
++	if (ret < 0) {
++		pr_info("erase fail with ret %d\n", ret);
++		goto error;
++	}
++
++	for (j = 0; j < g_nandx->chip->block_pages; j++) {
++		memset(dst_buf, 0, g_nandx->chip->page_size);
++		pr_info("check data after erase...!\n");
++		ret = nandx_read(dst_buf, NULL, offset, g_nandx->chip->page_size);
++		if (ret < 0) {
++			pr_info("read fail with ret %d\n", ret);
++			goto error;
++		}
++
++		for (i = 0; i < g_nandx->chip->page_size; i++) {
++			if (dst_buf[i] != 0xff) {
++				pr_info("read after erase, check fail @%d\n", i);
++				pr_info("all data should be 0xff\n");
++				ret = -ENANDERASE;
++				dump_buf(dst_buf, 128);
++				//goto error;
++				break;
++			}
++		}
++
++		pr_info("write data...!\n");
++		ret = nandx_write(src_buf, NULL, offset, g_nandx->chip->page_size);
++		if (ret < 0) {
++			pr_info("write fail with ret %d\n", ret);
++			goto error;
++		}
++
++		memset(dst_buf, 0, g_nandx->chip->page_size);
++		pr_info("read data...!\n");
++		ret = nandx_read(dst_buf, NULL, offset, g_nandx->chip->page_size);
++		if (ret < 0) {
++			pr_info("read fail with ret %d\n", ret);
++			goto error;
++		}
++
++		for (i = 0; i < g_nandx->chip->page_size; i++) {
++			if (dst_buf[i] != src_buf[i]) {
++				pr_info("read after write, check fail @%d\n", i);
++				pr_info("dst_buf should be same as src_buf\n");
++				ret = -EIO;
++				dump_buf(src_buf + i, 128);
++				dump_buf(dst_buf + i, 128);
++				break;
++			}
++		}
++
++		pr_err("%s %d %s@%d\n", __func__, __LINE__, ret?"Failed":"OK", j);
++		if (ret)
++			break;
++
++		offset += g_nandx->chip->page_size;
++	}
++
++	ret = nandx_erase(offset, g_nandx->chip->block_size);
++	if (ret < 0) {
++		pr_info("erase fail with ret %d\n", ret);
++		goto error;
++	}
++
++	memset(dst_buf, 0, g_nandx->chip->page_size);
++	ret = nandx_read(dst_buf, NULL, offset, g_nandx->chip->page_size);
++	if (ret < 0) {
++		pr_info("read fail with ret %d\n", ret);
++		goto error;
++	}
++
++	for (i = 0; i < g_nandx->chip->page_size; i++) {
++		if (dst_buf[i] != 0xff) {
++			pr_info("read after erase, check fail\n");
++			pr_info("all data should be 0xff\n");
++			ret = -ENANDERASE;
++			dump_buf(dst_buf, 128);
++			goto error;
++		}
++	}
++
++	return 0;
++
++error:
++#if !NANDX_BULK_IO_USE_DRAM
++	mem_free(src_buf);
++	mem_free(dst_buf);
++#endif
++	return ret;
++}
++#endif
+diff --git a/drivers/mtd/nandx/core/core_io.h b/drivers/mtd/nandx/core/core_io.h
+new file mode 100644
+index 0000000000..edcb60908a
+--- /dev/null
++++ b/drivers/mtd/nandx/core/core_io.h
+@@ -0,0 +1,39 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __CORE_IO_H__
++#define __CORE_IO_H__
++
++typedef int (*func_chip_ops)(struct nand_chip *, struct nand_ops *,
++			     int);
++
++enum nandx_op_mode {
++	NANDX_IDLE,
++	NANDX_WRITE,
++	NANDX_READ,
++	NANDX_ERASE
++};
++
++struct nandx_desc {
++	struct nand_chip *chip;
++	struct nandx_info info;
++	enum nandx_op_mode mode;
++
++	bool multi_en;
++	bool ecc_en;
++
++	struct nand_ops *ops;
++	int ops_len;
++	int ops_multi_len;
++	int ops_current;
++	int min_write_pages;
++
++	u8 *head_buf;
++	u8 *tail_buf;
++};
++
++#endif /* __CORE_IO_H__ */
+diff --git a/drivers/mtd/nandx/core/nand/device_spi.c b/drivers/mtd/nandx/core/nand/device_spi.c
+new file mode 100644
+index 0000000000..db338c28c2
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand/device_spi.c
+@@ -0,0 +1,200 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "../nand_device.h"
++#include "device_spi.h"
++
++/* spi nand basic commands */
++static struct nand_cmds spi_cmds = {
++	.reset = 0xff,
++	.read_id = 0x9f,
++	.read_status = 0x0f,
++	.read_param_page = 0x03,
++	.set_feature = 0x1f,
++	.get_feature = 0x0f,
++	.read_1st = 0x13,
++	.read_2nd = -1,
++	.random_out_1st = 0x03,
++	.random_out_2nd = -1,
++	.program_1st = 0x02,
++	.program_2nd = 0x10,
++	.erase_1st = 0xd8,
++	.erase_2nd = -1,
++	.read_cache = 0x30,
++	.read_cache_last = 0x3f,
++	.program_cache = 0x02
++};
++
++/* spi nand extend commands */
++static struct spi_extend_cmds spi_extend_cmds = {
++	.die_select = 0xc2,
++	.write_enable = 0x06
++};
++
++/* means the start bit of addressing type */
++static struct nand_addressing spi_addressing = {
++	.row_bit_start = 0,
++	.block_bit_start = 0,
++	.plane_bit_start = 12,
++	.lun_bit_start = 0,
++};
++
++/* spi nand endurance */
++static struct nand_endurance spi_endurance = {
++	.pe_cycle = 100000,
++	.ecc_req = 1,
++	.max_bitflips = 1
++};
++
++/* array_busy, write_protect, erase_fail, program_fail */
++static struct nand_status spi_status[] = {
++	{.array_busy = BIT(0),
++	.write_protect = BIT(1),
++	.erase_fail = BIT(2),
++	.program_fail = BIT(3)}
++};
++
++/* measure time by the us */
++static struct nand_array_timing spi_array_timing = {
++	.tRST = 500,
++	.tWHR = 1,
++	.tR = 25,
++	.tRCBSY = 25,
++	.tFEAT = 1,
++	.tPROG = 600,
++	.tPCBSY = 600,
++	.tBERS = 10000,
++	.tDBSY = 1
++};
++
++/* spi nand device table */
++static struct device_spi spi_nand[] = {
++	{
++		NAND_DEVICE("W25N01GV",
++			    NAND_PACK_ID(0xef, 0xaa, 0x21, 0, 0, 0, 0, 0),
++			    3, 0, 3, 3,
++			    1, 1, 1, 1024, KB(128), KB(2), 64, 1,
++			    &spi_cmds, &spi_addressing, &spi_status[0],
++			    &spi_endurance, &spi_array_timing),
++		{
++			NAND_SPI_PROTECT(0xa0, 1, 2, 6),
++			NAND_SPI_CONFIG(0xb0, 4, 6, 0),
++			NAND_SPI_STATUS(0xc0, 4, 5),
++			NAND_SPI_CHARACTER(0xff, 0xff, 0xff, 0xff)
++		},
++		&spi_extend_cmds, 0xff, 0xff
++	},
++	{
++		NAND_DEVICE("MX35LF1G",
++			    NAND_PACK_ID(0xc2, 0x12, 0x21, 0, 0, 0, 0, 0),
++			    2, 0, 3, 3,
++			    1, 1, 1, 1024, KB(128), KB(2), 64, 1,
++			    &spi_cmds, &spi_addressing, &spi_status[0],
++			    &spi_endurance, &spi_array_timing),
++		{
++			NAND_SPI_PROTECT(0xa0, 1, 2, 6),
++			NAND_SPI_CONFIG(0xb0, 4, 6, 1),
++			NAND_SPI_STATUS(0xc0, 4, 5),
++			NAND_SPI_CHARACTER(0xff, 0xff, 0xff, 0xff)
++		},
++		&spi_extend_cmds, 0xff, 0xff
++	},
++	{
++		NAND_DEVICE("MT29F4G01ABAFDWB",
++			    NAND_PACK_ID(0x2c, 0x34, 0, 0, 0, 0, 0, 0),
++			    2, 0, 3, 3,
++			    1, 1, 1, 2048, KB(256), KB(4), 256, 1,
++			    &spi_cmds, &spi_addressing, &spi_status[0],
++			    &spi_endurance, &spi_array_timing),
++		{
++			NAND_SPI_PROTECT(0xa0, 1, 2, 6),
++			NAND_SPI_CONFIG(0xb0, 4, 6, 1),
++			NAND_SPI_STATUS(0xc0, 4, 5),
++			NAND_SPI_CHARACTER(0xff, 0xff, 0xff, 0xff)
++		},
++		&spi_extend_cmds, 0xff, 0xff
++	},
++	{
++		NAND_DEVICE("GD5F4GQ4UB",
++			    NAND_PACK_ID(0xc8, 0xd4, 0, 0, 0, 0, 0, 0),
++			    2, 0, 3, 3,
++			    1, 1, 1, 2048, KB(256), KB(4), 256, 1,
++			    &spi_cmds, &spi_addressing, &spi_status[0],
++			    &spi_endurance, &spi_array_timing),
++		{
++			NAND_SPI_PROTECT(0xa0, 1, 2, 6),
++			NAND_SPI_CONFIG(0xb0, 4, 6, 1),
++			NAND_SPI_STATUS(0xc0, 4, 5),
++			NAND_SPI_CHARACTER(0xff, 0xff, 0xff, 0xff)
++		},
++		&spi_extend_cmds, 0xff, 0xff
++	},
++	{
++		NAND_DEVICE("TC58CVG2S0HRAIJ",
++			    NAND_PACK_ID(0x98, 0xED, 0x51, 0, 0, 0, 0, 0),
++			    3, 0, 3, 3,
++			    1, 1, 1, 2048, KB(256), KB(4), 256, 1,
++			    &spi_cmds, &spi_addressing, &spi_status[0],
++			    &spi_endurance, &spi_array_timing),
++		{
++			NAND_SPI_PROTECT(0xa0, 1, 2, 6),
++			NAND_SPI_CONFIG(0xb0, 4, 6, 1),
++			NAND_SPI_STATUS(0xc0, 4, 5),
++			NAND_SPI_CHARACTER(0xff, 0xff, 0xff, 0xff)
++		},
++		&spi_extend_cmds, 0xff, 0xff
++	},
++	{
++		NAND_DEVICE("NO-DEVICE",
++			    NAND_PACK_ID(0, 0, 0, 0, 0, 0, 0, 0), 0, 0, 0, 0,
++			    0, 0, 0, 0, 0, 0, 0, 1,
++			    &spi_cmds, &spi_addressing, &spi_status[0],
++			    &spi_endurance, &spi_array_timing),
++		{
++			NAND_SPI_PROTECT(0xa0, 1, 2, 6),
++			NAND_SPI_CONFIG(0xb0, 4, 6, 0),
++			NAND_SPI_STATUS(0xc0, 4, 5),
++			NAND_SPI_CHARACTER(0xff, 0xff, 0xff, 0xff)
++		},
++		&spi_extend_cmds, 0xff, 0xff
++	}
++};
++
++u8 spi_replace_rx_cmds(u8 mode)
++{
++	u8 rx_replace_cmds[] = {0x03, 0x3b, 0x6b, 0xbb, 0xeb};
++
++	return rx_replace_cmds[mode];
++}
++
++u8 spi_replace_tx_cmds(u8 mode)
++{
++	u8 tx_replace_cmds[] = {0x02, 0x32};
++
++	return tx_replace_cmds[mode];
++}
++
++u8 spi_replace_rx_col_cycle(u8 mode)
++{
++	u8 rx_replace_col_cycle[] = {3, 3, 3, 3, 4};
++
++	return rx_replace_col_cycle[mode];
++}
++
++u8 spi_replace_tx_col_cycle(u8 mode)
++{
++	u8 tx_replace_col_cycle[] = {2, 2};
++
++	return tx_replace_col_cycle[mode];
++}
++
++struct nand_device *nand_get_device(int index)
++{
++	return &spi_nand[index].dev;
++}
++
+diff --git a/drivers/mtd/nandx/core/nand/device_spi.h b/drivers/mtd/nandx/core/nand/device_spi.h
+new file mode 100644
+index 0000000000..1676b61fc8
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand/device_spi.h
+@@ -0,0 +1,132 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __DEVICE_SPI_H__
++#define __DEVICE_SPI_H__
++
++/*
++ * extend commands
++ * @die_select: select nand device die command
++ * @write_enable: enable write command before write data to spi nand
++ *    spi nand device will auto to be disable after write done
++ */
++struct spi_extend_cmds {
++	short die_select;
++	short write_enable;
++};
++
++/*
++ * protection feature register
++ * @addr: register address
++ * @wp_en_bit: write protection enable bit
++ * @bp_start_bit: block protection mask start bit
++ * @bp_end_bit: block protection mask end bit
++ */
++struct feature_protect {
++	u8 addr;
++	u8 wp_en_bit;
++	u8 bp_start_bit;
++	u8 bp_end_bit;
++};
++
++/*
++ * configuration feature register
++ * @addr: register address
++ * @ecc_en_bit: in-die ecc enable bit
++ * @otp_en_bit: enter otp access mode bit
++ * @need_qe: quad io enable bit
++ */
++struct feature_config {
++	u8 addr;
++	u8 ecc_en_bit;
++	u8 otp_en_bit;
++	u8 need_qe;
++};
++
++/*
++ * status feature register
++ * @addr: register address
++ * @ecc_start_bit: ecc status mask start bit for error bits number
++ * @ecc_end_bit: ecc status mask end bit for error bits number
++ * note that:
++ *   operations status (ex. array busy status) could see on struct nand_status
++ */
++struct feature_status {
++	u8 addr;
++	u8 ecc_start_bit;
++	u8 ecc_end_bit;
++};
++
++/*
++ * character feature register
++ * @addr: register address
++ * @die_sel_bit: die select bit
++ * @drive_start_bit: drive strength mask start bit
++ * @drive_end_bit: drive strength mask end bit
++ */
++struct feature_character {
++	u8 addr;
++	u8 die_sel_bit;
++	u8 drive_start_bit;
++	u8 drive_end_bit;
++};
++
++/*
++ * spi features
++ * @protect: protection feature register
++ * @config: configuration feature register
++ * @status: status feature register
++ * @character: character feature register
++ */
++struct spi_features {
++	struct feature_protect protect;
++	struct feature_config config;
++	struct feature_status status;
++	struct feature_character character;
++};
++
++/*
++ * device_spi
++ *    configurations of spi nand device table
++ * @dev: base information of nand device
++ * @feature: feature information for spi nand
++ * @extend_cmds: extended the nand base commands
++ * @tx_mode_mask: tx mode mask for chip read
++ * @rx_mode_mask: rx mode mask for chip write
++ */
++struct device_spi {
++	struct nand_device dev;
++	struct spi_features feature;
++	struct spi_extend_cmds *extend_cmds;
++
++	u8 tx_mode_mask;
++	u8 rx_mode_mask;
++};
++
++#define NAND_SPI_PROTECT(addr, wp_en_bit, bp_start_bit, bp_end_bit) \
++	{addr, wp_en_bit, bp_start_bit, bp_end_bit}
++
++#define NAND_SPI_CONFIG(addr, ecc_en_bit, otp_en_bit, need_qe) \
++	{addr, ecc_en_bit, otp_en_bit, need_qe}
++
++#define NAND_SPI_STATUS(addr, ecc_start_bit, ecc_end_bit) \
++	{addr, ecc_start_bit, ecc_end_bit}
++
++#define NAND_SPI_CHARACTER(addr, die_sel_bit, drive_start_bit, drive_end_bit) \
++	{addr, die_sel_bit, drive_start_bit, drive_end_bit}
++
++static inline struct device_spi *device_to_spi(struct nand_device *dev)
++{
++	return container_of(dev, struct device_spi, dev);
++}
++
++u8 spi_replace_rx_cmds(u8 mode);
++u8 spi_replace_tx_cmds(u8 mode);
++u8 spi_replace_rx_col_cycle(u8 mode);
++u8 spi_replace_tx_col_cycle(u8 mode);
++
++#endif /* __DEVICE_SPI_H__ */
+diff --git a/drivers/mtd/nandx/core/nand/nand_spi.c b/drivers/mtd/nandx/core/nand/nand_spi.c
+new file mode 100644
+index 0000000000..2ae03e1cf4
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand/nand_spi.c
+@@ -0,0 +1,526 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "../nand_chip.h"
++#include "../nand_device.h"
++#include "../nfi.h"
++#include "../nand_base.h"
++#include "device_spi.h"
++#include "nand_spi.h"
++
++#define READY_TIMEOUT   500000 /* us */
++
++static int nand_spi_read_status(struct nand_base *nand)
++{
++	struct device_spi *dev = device_to_spi(nand->dev);
++	u8 status;
++
++	nand->get_feature(nand, dev->feature.status.addr, &status, 1);
++
++	return status;
++}
++
++static int nand_spi_wait_ready(struct nand_base *nand, u32 timeout)
++{
++	u64 now, end;
++	int status;
++
++	end = get_current_time_us() + timeout;
++
++	do {
++		status = nand_spi_read_status(nand);
++		status &= nand->dev->status->array_busy;
++		now = get_current_time_us();
++
++		if (now > end)
++			break;
++	} while (status);
++
++	return status ? -EBUSY : 0;
++}
++
++static int nand_spi_set_op_mode(struct nand_base *nand, u8 mode)
++{
++	struct nand_spi *spi_nand = base_to_spi(nand);
++	struct nfi *nfi = nand->nfi;
++	int ret = 0;
++
++	if (spi_nand->op_mode != mode) {
++		ret = nfi->nfi_ctrl(nfi, SNFI_CTRL_OP_MODE, (void *)&mode);
++		spi_nand->op_mode = mode;
++	}
++
++	return ret;
++}
++
++static int nand_spi_set_config(struct nand_base *nand, u8 addr, u8 mask,
++			       bool en)
++{
++	u8 configs = 0;
++
++	nand->get_feature(nand, addr, &configs, 1);
++
++	if (en)
++		configs |= mask;
++	else
++		configs &= ~mask;
++
++	nand->set_feature(nand, addr, &configs, 1);
++
++	configs = 0;
++	nand->get_feature(nand, addr, &configs, 1);
++
++	return (configs & mask) == en ? 0 : -EFAULT;
++}
++
++static int nand_spi_die_select(struct nand_base *nand, int *row)
++{
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nfi *nfi = nand->nfi;
++	int lun_blocks, block_pages, lun, blocks;
++	int page = *row, ret = 0;
++	u8 param = 0, die_sel;
++
++	if (nand->dev->lun_num < 2)
++		return 0;
++
++	block_pages = nand_block_pages(nand->dev);
++	lun_blocks = nand_lun_blocks(nand->dev);
++	blocks = div_down(page, block_pages);
++	lun = div_down(blocks, lun_blocks);
++
++	if (dev->extend_cmds->die_select == -1) {
++		die_sel = (u8)(lun << dev->feature.character.die_sel_bit);
++		nand->get_feature(nand, dev->feature.character.addr, &param, 1);
++		param |= die_sel;
++		nand->set_feature(nand, dev->feature.character.addr, &param, 1);
++		param = 0;
++		nand->get_feature(nand, dev->feature.character.addr, &param, 1);
++		ret = (param & die_sel) ? 0 : -EFAULT;
++	} else {
++		nfi->reset(nfi);
++		nfi->send_cmd(nfi, dev->extend_cmds->die_select);
++		nfi->send_addr(nfi, lun, 0, 1, 0);
++		nfi->trigger(nfi);
++	}
++
++	*row =  page - (lun_blocks * block_pages) * lun;
++
++	return ret;
++}
++
++static int nand_spi_select_device(struct nand_base *nand, int cs)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	return parent->select_device(nand, cs);
++}
++
++static int nand_spi_reset(struct nand_base *nand)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	parent->reset(nand);
++
++	return nand_spi_wait_ready(nand, READY_TIMEOUT);
++}
++
++static int nand_spi_read_id(struct nand_base *nand, u8 *id, int count)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	return parent->read_id(nand, id, count);
++}
++
++static int nand_spi_read_param_page(struct nand_base *nand, u8 *data,
++				    int count)
++{
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nfi *nfi = nand->nfi;
++	int sectors, value;
++	u8 param = 0;
++
++	sectors = div_round_up(count, nfi->sector_size);
++
++	nand->get_feature(nand, dev->feature.config.addr, &param, 1);
++	param |= BIT(dev->feature.config.otp_en_bit);
++	nand->set_feature(nand, dev->feature.config.addr, &param, 1);
++
++	param = 0;
++	nand->get_feature(nand, dev->feature.config.addr, &param, 1);
++	if (param & BIT(dev->feature.config.otp_en_bit)) {
++		value = 0;
++		nfi->nfi_ctrl(nfi, NFI_CTRL_ECC, &value);
++		nand->dev->col_cycle  = spi_replace_rx_col_cycle(spi->rx_mode);
++		nand->read_page(nand, 0x01);
++		nand->read_data(nand, 0x01, 0, sectors, data, NULL);
++	}
++
++	param &= ~BIT(dev->feature.config.otp_en_bit);
++	nand->set_feature(nand, dev->feature.config.addr, &param, 1);
++
++	return 0;
++}
++
++static int nand_spi_set_feature(struct nand_base *nand, u8 addr,
++				u8 *param,
++				int count)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	nand->write_enable(nand);
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	return parent->set_feature(nand, addr, param, count);
++}
++
++static int nand_spi_get_feature(struct nand_base *nand, u8 addr,
++				u8 *param,
++				int count)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	return parent->get_feature(nand, addr, param, count);
++}
++
++static int nand_spi_addressing(struct nand_base *nand, int *row,
++			       int *col)
++{
++	struct nand_device *dev = nand->dev;
++	int plane, block, block_pages;
++	int ret;
++
++	ret = nand_spi_die_select(nand, row);
++	if (ret)
++		return ret;
++
++	block_pages = nand_block_pages(dev);
++	block = div_down(*row, block_pages);
++
++	plane = block % dev->plane_num;
++	*col |= (plane << dev->addressing->plane_bit_start);
++
++	return 0;
++}
++
++static int nand_spi_read_page(struct nand_base *nand, int row)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	if (spi->op_mode == SNFI_AUTO_MODE)
++		nand_spi_set_op_mode(nand, SNFI_AUTO_MODE);
++	else
++		nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	parent->read_page(nand, row);
++
++	return nand_spi_wait_ready(nand, READY_TIMEOUT);
++}
++
++static int nand_spi_read_data(struct nand_base *nand, int row, int col,
++			      int sectors, u8 *data, u8 *oob)
++{
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++	int ret;
++
++	if ((spi->rx_mode == SNFI_RX_114 || spi->rx_mode == SNFI_RX_144) &&
++	    dev->feature.config.need_qe)
++		nand_spi_set_config(nand, dev->feature.config.addr,
++				    BIT(0), true);
++
++	nand->dev->col_cycle  = spi_replace_rx_col_cycle(spi->rx_mode);
++
++	nand_spi_set_op_mode(nand, SNFI_CUSTOM_MODE);
++
++	ret = parent->read_data(nand, row, col, sectors, data, oob);
++	if (ret)
++		return -ENANDREAD;
++
++	if (spi->ondie_ecc) {
++		ret = nand_spi_read_status(nand);
++		ret &= GENMASK(dev->feature.status.ecc_end_bit,
++			       dev->feature.status.ecc_start_bit);
++		ret >>= dev->feature.status.ecc_start_bit;
++		if (ret > nand->dev->endurance->ecc_req)
++			return -ENANDREAD;
++		else if (ret > nand->dev->endurance->max_bitflips)
++			return -ENANDFLIPS;
++	}
++
++	return 0;
++}
++
++static int nand_spi_write_enable(struct nand_base *nand)
++{
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nfi *nfi = nand->nfi;
++	int status;
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->extend_cmds->write_enable);
++
++	nfi->trigger(nfi);
++
++	status = nand_spi_read_status(nand);
++	status &= nand->dev->status->write_protect;
++
++	return !status;
++}
++
++static int nand_spi_program_data(struct nand_base *nand, int row,
++				 int col,
++				 u8 *data, u8 *oob)
++{
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nand_spi *spi = base_to_spi(nand);
++
++	if (spi->tx_mode == SNFI_TX_114 && dev->feature.config.need_qe)
++		nand_spi_set_config(nand, dev->feature.config.addr,
++				    BIT(0), true);
++
++	nand_spi_set_op_mode(nand, SNFI_CUSTOM_MODE);
++
++	nand->dev->col_cycle  = spi_replace_tx_col_cycle(spi->tx_mode);
++
++	return spi->parent->program_data(nand, row, col, data, oob);
++}
++
++static int nand_spi_program_page(struct nand_base *nand, int row)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_device *dev = nand->dev;
++	struct nfi *nfi = nand->nfi;
++
++	if (spi->op_mode == SNFI_AUTO_MODE)
++		nand_spi_set_op_mode(nand, SNFI_AUTO_MODE);
++	else
++		nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->program_2nd);
++	nfi->send_addr(nfi, 0, row, dev->col_cycle, dev->row_cycle);
++	nfi->trigger(nfi);
++
++	return nand_spi_wait_ready(nand, READY_TIMEOUT);
++}
++
++static int nand_spi_erase_block(struct nand_base *nand, int row)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nand_base *parent = spi->parent;
++
++	nand_spi_set_op_mode(nand, SNFI_MAC_MODE);
++
++	parent->erase_block(nand, row);
++
++	return nand_spi_wait_ready(nand, READY_TIMEOUT);
++}
++
++static int nand_chip_spi_ctrl(struct nand_chip *chip, int cmd,
++			      void *args)
++{
++	struct nand_base *nand = chip->nand;
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nand_spi *spi = base_to_spi(nand);
++	struct nfi *nfi = nand->nfi;
++	int ret = 0, value = *(int *)args;
++
++	switch (cmd) {
++	case CHIP_CTRL_ONDIE_ECC:
++		spi->ondie_ecc = (bool)value;
++		ret = nand_spi_set_config(nand, dev->feature.config.addr,
++					  BIT(dev->feature.config.ecc_en_bit),
++					  spi->ondie_ecc);
++		break;
++
++	case SNFI_CTRL_TX_MODE:
++		if (value < 0 || value > SNFI_TX_114)
++			return -EOPNOTSUPP;
++
++		if (dev->tx_mode_mask & BIT(value)) {
++			spi->tx_mode = value;
++			nand->dev->cmds->random_out_1st = spi_replace_tx_cmds(
++								  spi->tx_mode);
++			ret = nfi->nfi_ctrl(nfi, cmd, args);
++		}
++
++		break;
++
++	case SNFI_CTRL_RX_MODE:
++		if (value < 0 || value > SNFI_RX_144)
++			return -EOPNOTSUPP;
++
++		if (dev->rx_mode_mask & BIT(value)) {
++			spi->rx_mode = value;
++			nand->dev->cmds->program_1st = spi_replace_rx_cmds(
++							       spi->rx_mode);
++			ret = nfi->nfi_ctrl(nfi, cmd, args);
++		}
++
++		break;
++
++	case CHIP_CTRL_OPS_CACHE:
++	case CHIP_CTRL_OPS_MULTI:
++	case CHIP_CTRL_PSLC_MODE:
++	case CHIP_CTRL_DDR_MODE:
++	case CHIP_CTRL_DRIVE_STRENGTH:
++	case CHIP_CTRL_TIMING_MODE:
++		ret = -EOPNOTSUPP;
++		break;
++
++	default:
++		ret = nfi->nfi_ctrl(nfi, cmd, args);
++		break;
++	}
++
++	return ret;
++}
++
++int nand_chip_spi_resume(struct nand_chip *chip)
++{
++	struct nand_base *nand = chip->nand;
++	struct nand_spi *spi = base_to_spi(nand);
++	struct device_spi *dev = device_to_spi(nand->dev);
++	struct nfi *nfi = nand->nfi;
++	struct nfi_format format;
++	u8 mask;
++
++	nand->reset(nand);
++
++	mask = GENMASK(dev->feature.protect.bp_end_bit,
++		       dev->feature.protect.bp_start_bit);
++	nand_spi_set_config(nand, dev->feature.config.addr, mask, false);
++	mask =  BIT(dev->feature.config.ecc_en_bit);
++	nand_spi_set_config(nand, dev->feature.config.addr, mask,
++			    spi->ondie_ecc);
++
++	format.page_size = nand->dev->page_size;
++	format.spare_size = nand->dev->spare_size;
++	format.ecc_req = nand->dev->endurance->ecc_req;
++
++	return nfi->set_format(nfi, &format);
++}
++
++static int nand_spi_set_format(struct nand_base *nand)
++{
++	struct nfi_format format = {
++		nand->dev->page_size,
++		nand->dev->spare_size,
++		nand->dev->endurance->ecc_req
++	};
++
++	return nand->nfi->set_format(nand->nfi, &format);
++}
++
++struct nand_base *nand_device_init(struct nand_chip *chip)
++{
++	struct nand_base *nand;
++	struct nand_spi *spi;
++	struct device_spi *dev;
++	int ret;
++	u8 mask;
++
++	spi = mem_alloc(1, sizeof(struct nand_spi));
++	if (!spi) {
++		pr_info("alloc nand_spi fail\n");
++		return NULL;
++	}
++
++	spi->ondie_ecc = false;
++	spi->op_mode = SNFI_CUSTOM_MODE;
++	spi->rx_mode = SNFI_RX_114;
++	spi->tx_mode = SNFI_TX_114;
++
++	spi->parent = chip->nand;
++	nand = &spi->base;
++	nand->dev = spi->parent->dev;
++	nand->nfi = spi->parent->nfi;
++
++	nand->select_device = nand_spi_select_device;
++	nand->reset = nand_spi_reset;
++	nand->read_id = nand_spi_read_id;
++	nand->read_param_page = nand_spi_read_param_page;
++	nand->set_feature = nand_spi_set_feature;
++	nand->get_feature = nand_spi_get_feature;
++	nand->read_status = nand_spi_read_status;
++	nand->addressing = nand_spi_addressing;
++	nand->read_page = nand_spi_read_page;
++	nand->read_data = nand_spi_read_data;
++	nand->write_enable = nand_spi_write_enable;
++	nand->program_data = nand_spi_program_data;
++	nand->program_page = nand_spi_program_page;
++	nand->erase_block = nand_spi_erase_block;
++
++	chip->chip_ctrl = nand_chip_spi_ctrl;
++	chip->nand_type = NAND_SPI;
++	chip->resume = nand_chip_spi_resume;
++
++	ret = nand_detect_device(nand);
++	if (ret)
++		goto err;
++
++	nand->select_device(nand, 0);
++
++	ret = nand_spi_set_format(nand);
++	if (ret)
++		goto err;
++
++	dev = (struct device_spi *)nand->dev;
++
++	nand->dev->cmds->random_out_1st =
++		spi_replace_rx_cmds(spi->rx_mode);
++	nand->dev->cmds->program_1st =
++		spi_replace_tx_cmds(spi->tx_mode);
++
++	mask = GENMASK(dev->feature.protect.bp_end_bit,
++		       dev->feature.protect.bp_start_bit);
++	ret = nand_spi_set_config(nand, dev->feature.protect.addr, mask, false);
++	if (ret)
++		goto err;
++
++	mask =  BIT(dev->feature.config.ecc_en_bit);
++	ret = nand_spi_set_config(nand, dev->feature.config.addr, mask,
++				  spi->ondie_ecc);
++	if (ret)
++		goto err;
++
++	return nand;
++
++err:
++	mem_free(spi);
++	return NULL;
++}
++
++void nand_exit(struct nand_base *nand)
++{
++	struct nand_spi *spi = base_to_spi(nand);
++
++	nand_base_exit(spi->parent);
++	mem_free(spi);
++}
+diff --git a/drivers/mtd/nandx/core/nand/nand_spi.h b/drivers/mtd/nandx/core/nand/nand_spi.h
+new file mode 100644
+index 0000000000..e55e4de6f7
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand/nand_spi.h
+@@ -0,0 +1,35 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NAND_SPI_H__
++#define __NAND_SPI_H__
++
++/*
++ * spi nand handler
++ * @base: spi nand base functions
++ * @parent: common parent nand base functions
++ * @tx_mode: spi bus width of transfer to device
++ * @rx_mode: spi bus width of transfer from device
++ * @op_mode: spi nand controller (NFI) operation mode
++ * @ondie_ecc: spi nand on-die ecc flag
++ */
++
++struct nand_spi {
++	struct nand_base base;
++	struct nand_base *parent;
++	u8 tx_mode;
++	u8 rx_mode;
++	u8 op_mode;
++	bool ondie_ecc;
++};
++
++static inline struct nand_spi *base_to_spi(struct nand_base *base)
++{
++	return container_of(base, struct nand_spi, base);
++}
++
++#endif /* __NAND_SPI_H__ */
+diff --git a/drivers/mtd/nandx/core/nand_base.c b/drivers/mtd/nandx/core/nand_base.c
+new file mode 100644
+index 0000000000..65998e5460
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand_base.c
+@@ -0,0 +1,304 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "nand_chip.h"
++#include "nand_device.h"
++#include "nfi.h"
++#include "nand_base.h"
++
++static int nand_base_select_device(struct nand_base *nand, int cs)
++{
++	struct nfi *nfi = nand->nfi;
++
++	nfi->reset(nfi);
++
++	return nfi->select_chip(nfi, cs);
++}
++
++static int nand_base_reset(struct nand_base *nand)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->reset);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tRST);
++}
++
++static int nand_base_read_id(struct nand_base *nand, u8 *id, int count)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->read_id);
++	nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tWHR);
++	nfi->send_addr(nfi, 0, 0, 1, 0);
++
++	return nfi->read_bytes(nfi, id, count);
++}
++
++static int nand_base_read_param_page(struct nand_base *nand, u8 *data,
++				     int count)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->read_param_page);
++	nfi->send_addr(nfi, 0, 0, 1, 0);
++
++	nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tR);
++
++	return nfi->read_bytes(nfi, data, count);
++}
++
++static int nand_base_set_feature(struct nand_base *nand, u8 addr,
++				 u8 *param,
++				 int count)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->set_feature);
++	nfi->send_addr(nfi, addr, 0, 1, 0);
++
++	nfi->write_bytes(nfi, param, count);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING,
++			       dev->array_timing->tFEAT);
++}
++
++static int nand_base_get_feature(struct nand_base *nand, u8 addr,
++				 u8 *param,
++				 int count)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->get_feature);
++	nfi->send_addr(nfi, addr, 0, 1, 0);
++	nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tFEAT);
++
++	return nfi->read_bytes(nfi, param, count);
++}
++
++static int nand_base_read_status(struct nand_base *nand)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++	u8 status = 0;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->read_status);
++	nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tWHR);
++	nfi->read_bytes(nfi, &status, 1);
++
++	return status;
++}
++
++static int nand_base_addressing(struct nand_base *nand, int *row,
++				int *col)
++{
++	struct nand_device *dev = nand->dev;
++	int lun, plane, block, page, cs = 0;
++	int block_pages, target_blocks, wl = 0;
++	int icol = *col;
++
++	if (dev->target_num > 1) {
++		block_pages = nand_block_pages(dev);
++		target_blocks = nand_target_blocks(dev);
++		cs = div_down(*row, block_pages * target_blocks);
++		*row -= cs * block_pages * target_blocks;
++	}
++
++	nand->select_device(nand, cs);
++
++	block_pages = nand_block_pages(dev);
++	block = div_down(*row, block_pages);
++	page = *row - block * block_pages;
++	plane = reminder(block, dev->plane_num);
++	lun = div_down(block, nand_lun_blocks(dev));
++
++	wl |= (page << dev->addressing->row_bit_start);
++	wl |= (block << dev->addressing->block_bit_start);
++	wl |= (plane << dev->addressing->plane_bit_start);
++	wl |= (lun << dev->addressing->lun_bit_start);
++
++	*row = wl;
++	*col = icol;
++
++	return 0;
++}
++
++static int nand_base_read_page(struct nand_base *nand, int row)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->read_1st);
++	nfi->send_addr(nfi, 0, row, dev->col_cycle, dev->row_cycle);
++	nfi->send_cmd(nfi, dev->cmds->read_2nd);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tR);
++}
++
++static int nand_base_read_data(struct nand_base *nand, int row, int col,
++			       int sectors, u8 *data, u8 *oob)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->random_out_1st);
++	nfi->send_addr(nfi, col, row, dev->col_cycle, dev->row_cycle);
++	nfi->send_cmd(nfi, dev->cmds->random_out_2nd);
++	nfi->wait_ready(nfi, NAND_WAIT_POLLING, dev->array_timing->tRCBSY);
++
++	return nfi->read_sectors(nfi, data, oob, sectors);
++}
++
++static int nand_base_write_enable(struct nand_base *nand)
++{
++	struct nand_device *dev = nand->dev;
++	int status;
++
++	status = nand_base_read_status(nand);
++	if (status & dev->status->write_protect)
++		return 0;
++
++	return -ENANDWP;
++}
++
++static int nand_base_program_data(struct nand_base *nand, int row,
++				  int col,
++				  u8 *data, u8 *oob)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->program_1st);
++	nfi->send_addr(nfi, 0, row, dev->col_cycle, dev->row_cycle);
++
++	return nfi->write_page(nfi, data, oob);
++}
++
++static int nand_base_program_page(struct nand_base *nand, int row)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->program_2nd);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING,
++			       dev->array_timing->tPROG);
++}
++
++static int nand_base_erase_block(struct nand_base *nand, int row)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->erase_1st);
++	nfi->send_addr(nfi, 0, row, 0, dev->row_cycle);
++	nfi->send_cmd(nfi, dev->cmds->erase_2nd);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING,
++			       dev->array_timing->tBERS);
++}
++
++static int nand_base_read_cache(struct nand_base *nand, int row)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->read_1st);
++	nfi->send_addr(nfi, 0, row, dev->col_cycle, dev->row_cycle);
++	nfi->send_cmd(nfi, dev->cmds->read_cache);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING,
++			       dev->array_timing->tRCBSY);
++}
++
++static int nand_base_read_last(struct nand_base *nand)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->read_cache_last);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING,
++			       dev->array_timing->tRCBSY);
++}
++
++static int nand_base_program_cache(struct nand_base *nand)
++{
++	struct nfi *nfi = nand->nfi;
++	struct nand_device *dev = nand->dev;
++
++	nfi->reset(nfi);
++	nfi->send_cmd(nfi, dev->cmds->program_cache);
++	nfi->trigger(nfi);
++
++	return nfi->wait_ready(nfi, NAND_WAIT_POLLING,
++			       dev->array_timing->tPCBSY);
++}
++
++struct nand_base *nand_base_init(struct nand_device *dev,
++				 struct nfi *nfi)
++{
++	struct nand_base *nand;
++
++	nand = mem_alloc(1, sizeof(struct nand_base));
++	if (!nand)
++		return NULL;
++
++	nand->dev = dev;
++	nand->nfi = nfi;
++	nand->select_device = nand_base_select_device;
++	nand->reset = nand_base_reset;
++	nand->read_id = nand_base_read_id;
++	nand->read_param_page = nand_base_read_param_page;
++	nand->set_feature = nand_base_set_feature;
++	nand->get_feature = nand_base_get_feature;
++	nand->read_status = nand_base_read_status;
++	nand->addressing = nand_base_addressing;
++	nand->read_page = nand_base_read_page;
++	nand->read_data = nand_base_read_data;
++	nand->read_cache = nand_base_read_cache;
++	nand->read_last = nand_base_read_last;
++	nand->write_enable = nand_base_write_enable;
++	nand->program_data = nand_base_program_data;
++	nand->program_page = nand_base_program_page;
++	nand->program_cache = nand_base_program_cache;
++	nand->erase_block = nand_base_erase_block;
++
++	return nand;
++}
++
++void nand_base_exit(struct nand_base *base)
++{
++	nfi_exit(base->nfi);
++	mem_free(base);
++}
+diff --git a/drivers/mtd/nandx/core/nand_base.h b/drivers/mtd/nandx/core/nand_base.h
+new file mode 100644
+index 0000000000..13217978e5
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand_base.h
+@@ -0,0 +1,71 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NAND_BASE_H__
++#define __NAND_BASE_H__
++
++/*
++ * nand base functions
++ * @dev: nand device infomations
++ * @nfi: nand host controller
++ * @select_device: select one nand device of multi nand on chip
++ * @reset: reset current nand device
++ * @read_id: read current nand id
++ * @read_param_page: read current nand parameters page
++ * @set_feature: configurate the nand device feature
++ * @get_feature: get the nand device feature
++ * @read_status: read nand device status
++ * @addressing: addressing the address to nand device physical address
++ * @read_page: read page data to device cache register
++ * @read_data: read data from device cache register by bus protocol
++ * @read_cache: nand cache read operation for data output
++ * @read_last: nand cache read operation for last page output
++ * @write_enable: enable program/erase for nand, especially spi nand
++ * @program_data: program data to nand device cache register
++ * @program_page: program page data from nand device cache register to array
++ * @program_cache: nand cache program operation for data input
++ * @erase_block: erase nand block operation
++ */
++struct nand_base {
++	struct nand_device *dev;
++	struct nfi *nfi;
++	int (*select_device)(struct nand_base *nand, int cs);
++	int (*reset)(struct nand_base *nand);
++	int (*read_id)(struct nand_base *nand, u8 *id, int count);
++	int (*read_param_page)(struct nand_base *nand, u8 *data, int count);
++	int (*set_feature)(struct nand_base *nand, u8 addr, u8 *param,
++			   int count);
++	int (*get_feature)(struct nand_base *nand, u8 addr, u8 *param,
++			   int count);
++	int (*read_status)(struct nand_base *nand);
++	int (*addressing)(struct nand_base *nand, int *row, int *col);
++
++	int (*read_page)(struct nand_base *nand, int row);
++	int (*read_data)(struct nand_base *nand, int row, int col, int sectors,
++			 u8 *data, u8 *oob);
++	int (*read_cache)(struct nand_base *nand, int row);
++	int (*read_last)(struct nand_base *nand);
++
++	int (*write_enable)(struct nand_base *nand);
++	int (*program_data)(struct nand_base *nand, int row, int col, u8 *data,
++			    u8 *oob);
++	int (*program_page)(struct nand_base *nand, int row);
++	int (*program_cache)(struct nand_base *nand);
++
++	int (*erase_block)(struct nand_base *nand, int row);
++};
++
++struct nand_base *nand_base_init(struct nand_device *device,
++				 struct nfi *nfi);
++void nand_base_exit(struct nand_base *base);
++
++struct nand_base *nand_device_init(struct nand_chip *nand);
++void nand_exit(struct nand_base *nand);
++
++int nand_detect_device(struct nand_base *nand);
++
++#endif /* __NAND_BASE_H__ */
+diff --git a/drivers/mtd/nandx/core/nand_chip.c b/drivers/mtd/nandx/core/nand_chip.c
+new file mode 100644
+index 0000000000..02adc6f52e
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand_chip.c
+@@ -0,0 +1,272 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "nand_chip.h"
++#include "nand_device.h"
++#include "nfi.h"
++#include "nand_base.h"
++
++static int nand_chip_read_page(struct nand_chip *chip,
++			       struct nand_ops *ops,
++			       int count)
++{
++	struct nand_base *nand = chip->nand;
++	struct nand_device *dev = nand->dev;
++	int i, ret = 0;
++	int row, col, sectors;
++	u8 *data, *oob;
++
++	for (i = 0; i < count; i++) {
++		row = ops[i].row;
++		col = ops[i].col;
++
++		nand->addressing(nand, &row, &col);
++		ops[i].status = nand->read_page(nand, row);
++		if (ops[i].status < 0) {
++			ret = ops[i].status;
++			continue;
++		}
++
++		data = ops[i].data;
++		oob = ops[i].oob;
++		sectors = ops[i].len / chip->sector_size;
++		ops[i].status = nand->read_data(nand, row, col,
++						sectors, data, oob);
++		if (ops[i].status > 0)
++			ops[i].status = ops[i].status >=
++					dev->endurance->max_bitflips ?
++					-ENANDFLIPS : 0;
++
++		ret = min_t(int, ret, ops[i].status);
++	}
++
++	return ret;
++}
++
++static int nand_chip_write_page(struct nand_chip *chip,
++				struct nand_ops *ops,
++				int count)
++{
++	struct nand_base *nand = chip->nand;
++	struct nand_device *dev = nand->dev;
++	int i, ret = 0;
++	int row, col;
++	u8 *data, *oob;
++
++	for (i = 0; i < count; i++) {
++		row = ops[i].row;
++		col = ops[i].col;
++
++		nand->addressing(nand, &row, &col);
++
++		ops[i].status = nand->write_enable(nand);
++		if (ops[i].status) {
++			pr_debug("Write Protect at %x!\n", row);
++			ops[i].status = -ENANDWP;
++			return -ENANDWP;
++		}
++
++		data = ops[i].data;
++		oob = ops[i].oob;
++		ops[i].status = nand->program_data(nand, row, col, data, oob);
++		if (ops[i].status < 0) {
++			ret = ops[i].status;
++			continue;
++		}
++
++		ops[i].status = nand->program_page(nand, row);
++		if (ops[i].status < 0) {
++			ret = ops[i].status;
++			continue;
++		}
++
++		ops[i].status = nand->read_status(nand);
++		if (ops[i].status & dev->status->program_fail)
++			ops[i].status = -ENANDWRITE;
++
++		ret = min_t(int, ret, ops[i].status);
++	}
++
++	return ret;
++}
++
++static int nand_chip_erase_block(struct nand_chip *chip,
++				 struct nand_ops *ops,
++				 int count)
++{
++	struct nand_base *nand = chip->nand;
++	struct nand_device *dev = nand->dev;
++	int i, ret = 0;
++	int row, col;
++
++	for (i = 0; i < count; i++) {
++		row = ops[i].row;
++		col = ops[i].col;
++
++		nand->addressing(nand, &row, &col);
++
++		ops[i].status = nand->write_enable(nand);
++		if (ops[i].status) {
++			pr_debug("Write Protect at %x!\n", row);
++			ops[i].status = -ENANDWP;
++			return -ENANDWP;
++		}
++
++		ops[i].status = nand->erase_block(nand, row);
++		if (ops[i].status < 0) {
++			ret = ops[i].status;
++			continue;
++		}
++
++		ops[i].status = nand->read_status(nand);
++		if (ops[i].status & dev->status->erase_fail)
++			ops[i].status = -ENANDERASE;
++
++		ret = min_t(int, ret, ops[i].status);
++	}
++
++	return ret;
++}
++
++/* read first bad mark on spare */
++static int nand_chip_is_bad_block(struct nand_chip *chip,
++				  struct nand_ops *ops,
++				  int count)
++{
++	int i, ret, value;
++	int status = 0;
++	u8 *data, *tmp_buf;
++
++	tmp_buf = mem_alloc(1, chip->page_size);
++	if (!tmp_buf)
++		return -ENOMEM;
++
++	memset(tmp_buf, 0x00, chip->page_size);
++
++	/* Disable ECC */
++	value = 0;
++	ret = chip->chip_ctrl(chip, NFI_CTRL_ECC, &value);
++	if (ret)
++		goto out;
++
++	ret = chip->read_page(chip, ops, count);
++	if (ret)
++		goto out;
++
++	for (i = 0; i < count; i++) {
++		data = ops[i].data;
++
++		/* temp solution for mt7622, because of no bad mark swap */
++		if (!memcmp(data, tmp_buf, chip->page_size)) {
++			ops[i].status = -ENANDBAD;
++			status = -ENANDBAD;
++			
++		} else {
++			ops[i].status = 0;
++		}
++	}
++
++	/* Enable ECC */
++	value = 1;
++	ret = chip->chip_ctrl(chip, NFI_CTRL_ECC, &value);
++	if (ret)
++		goto out;
++
++	mem_free(tmp_buf);
++	return status;
++
++out:
++	mem_free(tmp_buf);
++	return ret;
++}
++
++static int nand_chip_ctrl(struct nand_chip *chip, int cmd, void *args)
++{
++	return -EOPNOTSUPP;
++}
++
++static int nand_chip_suspend(struct nand_chip *chip)
++{
++	return 0;
++}
++
++static int nand_chip_resume(struct nand_chip *chip)
++{
++	return 0;
++}
++
++struct nand_chip *nand_chip_init(struct nfi_resource *res)
++{
++	struct nand_chip *chip;
++	struct nand_base *nand;
++	struct nfi *nfi;
++
++	chip = mem_alloc(1, sizeof(struct nand_chip));
++	if (!chip) {
++		pr_info("nand chip alloc fail!\n");
++		return NULL;
++	}
++
++	nfi = nfi_init(res);
++	if (!nfi) {
++		pr_info("nfi init fail!\n");
++		goto nfi_err;
++	}
++
++	nand = nand_base_init(NULL, nfi);
++	if (!nand) {
++		pr_info("nand base init fail!\n");
++		goto base_err;
++	}
++
++	chip->nand = (void *)nand;
++	chip->read_page = nand_chip_read_page;
++	chip->write_page = nand_chip_write_page;
++	chip->erase_block = nand_chip_erase_block;
++	chip->is_bad_block = nand_chip_is_bad_block;
++	chip->chip_ctrl = nand_chip_ctrl;
++	chip->suspend = nand_chip_suspend;
++	chip->resume = nand_chip_resume;
++
++	nand = nand_device_init(chip);
++	if (!nand)
++		goto nand_err;
++
++	chip->nand = (void *)nand;
++	chip->plane_num = nand->dev->plane_num;
++	chip->block_num = nand_total_blocks(nand->dev);
++	chip->block_size = nand->dev->block_size;
++	chip->block_pages = nand_block_pages(nand->dev);
++	chip->page_size = nand->dev->page_size;
++	chip->oob_size = nfi->fdm_size * div_down(chip->page_size,
++						  nfi->sector_size);
++	chip->sector_size = nfi->sector_size;
++	chip->sector_spare_size = nfi->sector_spare_size;
++	chip->min_program_pages = nand->dev->min_program_pages;
++	chip->ecc_strength = nfi->ecc_strength;
++	chip->ecc_parity_size = nfi->ecc_parity_size;
++	chip->fdm_ecc_size = nfi->fdm_ecc_size;
++	chip->fdm_reg_size = nfi->fdm_size;
++
++	return chip;
++
++nand_err:
++	mem_free(nand);
++base_err:
++	nfi_exit(nfi);
++nfi_err:
++	mem_free(chip);
++	return NULL;
++}
++
++void nand_chip_exit(struct nand_chip *chip)
++{
++	nand_exit(chip->nand);
++	mem_free(chip);
++}
+diff --git a/drivers/mtd/nandx/core/nand_chip.h b/drivers/mtd/nandx/core/nand_chip.h
+new file mode 100644
+index 0000000000..3e9c8e6ca3
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand_chip.h
+@@ -0,0 +1,103 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NAND_CHIP_H__
++#define __NAND_CHIP_H__
++
++enum nand_type {
++	NAND_SPI,
++	NAND_SLC,
++	NAND_MLC,
++	NAND_TLC
++};
++
++/*
++ * nand chip operation unit
++ *    one nand_ops indicates one row operation
++ * @row: nand chip row address, like as nand row
++ * @col: nand chip column address, like as nand column
++ * @len: operate data length, min is sector_size,
++ *    max is page_size and sector_size aligned
++ * @status: one operation result status
++ * @data: data buffer for operation
++ * @oob: oob buffer for operation, like as nand spare area
++ */
++struct nand_ops {
++	int row;
++	int col;
++	int len;
++	int status;
++	void *data;
++	void *oob;
++};
++
++/*
++ * nand chip descriptions
++ *    nand chip includes nand controller and the several same nand devices
++ * @nand_type: the nand type on this chip,
++ *    the chip maybe have several nand device and the type must be same
++ * @plane_num: the whole plane number on the chip
++ * @block_num: the whole block number on the chip
++ * @block_size: nand device block size
++ * @block_pages: nand device block has page number
++ * @page_size: nand device page size
++ * @oob_size: chip out of band size, like as nand spare szie,
++ *    but restricts this:
++ *    the size is provied by nand controller(NFI),
++ *    because NFI would use some nand spare size
++ * @min_program_pages: chip needs min pages per program operations
++ *    one page as one nand_ops
++ * @sector_size: chip min read size
++ * @sector_spare_size: spare size for sector, is spare_size/page_sectors
++ * @ecc_strength: ecc stregth per sector_size, it would be for calculated ecc
++ * @ecc_parity_size: ecc parity size for one  sector_size data
++ * @nand: pointer to inherited struct nand_base
++ * @read_page: read %count pages on chip
++ * @write_page: write %count pages on chip
++ * @erase_block: erase %count blocks on chip, one block is one nand_ops
++ *    it is better to set nand_ops.row to block start row
++ * @is_bad_block: judge the %count blocks on chip if they are bad
++ *    by vendor specification
++ * @chip_ctrl: control the chip features by nandx_ctrl_cmd
++ * @suspend: suspend nand chip
++ * @resume: resume nand chip
++ */
++struct nand_chip {
++	int nand_type;
++	int plane_num;
++	int block_num;
++	int block_size;
++	int block_pages;
++	int page_size;
++	int oob_size;
++
++	int min_program_pages;
++	int sector_size;
++	int sector_spare_size;
++	int ecc_strength;
++	int ecc_parity_size;
++	u32 fdm_ecc_size;
++	u32 fdm_reg_size;
++
++	void *nand;
++
++	int (*read_page)(struct nand_chip *chip, struct nand_ops *ops,
++			 int count);
++	int (*write_page)(struct nand_chip *chip, struct nand_ops *ops,
++			  int count);
++	int (*erase_block)(struct nand_chip *chip, struct nand_ops *ops,
++			   int count);
++	int (*is_bad_block)(struct nand_chip *chip, struct nand_ops *ops,
++			    int count);
++	int (*chip_ctrl)(struct nand_chip *chip, int cmd, void *args);
++	int (*suspend)(struct nand_chip *chip);
++	int (*resume)(struct nand_chip *chip);
++};
++
++struct nand_chip *nand_chip_init(struct nfi_resource *res);
++void nand_chip_exit(struct nand_chip *chip);
++#endif /* __NAND_CHIP_H__ */
+diff --git a/drivers/mtd/nandx/core/nand_device.c b/drivers/mtd/nandx/core/nand_device.c
+new file mode 100644
+index 0000000000..9f6764d1bc
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand_device.c
+@@ -0,0 +1,285 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "nand_chip.h"
++#include "nand_device.h"
++#include "nand_base.h"
++
++#define MAX_CHIP_DEVICE 4
++#define PARAM_PAGE_LEN  2048
++#define ONFI_CRC_BASE   0x4f4e
++
++static u16 nand_onfi_crc16(u16 crc, u8 const *p, size_t len)
++{
++	int i;
++
++	while (len--) {
++		crc ^= *p++ << 8;
++
++		for (i = 0; i < 8; i++)
++			crc = (crc << 1) ^ ((crc & 0x8000) ? 0x8005 : 0);
++	}
++
++	return crc;
++}
++
++static inline void decode_addr_cycle(u8 addr_cycle, u8 *row_cycle,
++				     u8 *col_cycle)
++{
++	*row_cycle = addr_cycle & 0xf;
++	*col_cycle = (addr_cycle >> 4) & 0xf;
++}
++
++static int detect_onfi(struct nand_device *dev,
++		       struct nand_onfi_params *onfi)
++{
++	struct nand_endurance *endurance = dev->endurance;
++	u16 size, i, crc16;
++	u8 *id;
++
++	size = sizeof(struct nand_onfi_params) - sizeof(u16);
++
++	for (i = 0; i < 3; i++) {
++		crc16 = nand_onfi_crc16(ONFI_CRC_BASE, (u8 *)&onfi[i], size);
++
++		if (onfi[i].signature[0] == 'O' &&
++		    onfi[i].signature[1] == 'N' &&
++		    onfi[i].signature[2] == 'F' &&
++		    onfi[i].signature[3] == 'I' &&
++		    onfi[i].crc16 == crc16)
++			break;
++
++		/* in some spi nand, onfi signature maybe "NAND" */
++		if (onfi[i].signature[0] == 'N' &&
++		    onfi[i].signature[1] == 'A' &&
++		    onfi[i].signature[2] == 'N' &&
++		    onfi[i].signature[3] == 'D' &&
++		    onfi[i].crc16 == crc16)
++			break;
++	}
++
++	if (i == 3)
++		return -ENODEV;
++
++	memcpy(dev->name, onfi[i].model, 20);
++	id = onfi[i].manufacturer;
++	dev->id = NAND_PACK_ID(id[0], id[1], id[2], id[3], id[4], id[5], id[6],
++			       id[7]);
++	dev->id_len = MAX_ID_NUM;
++	dev->io_width = (onfi[i].features & 1) ? NAND_IO16 : NAND_IO8;
++	decode_addr_cycle(onfi[i].addr_cycle, &dev->row_cycle,
++			  &dev->col_cycle);
++	dev->target_num = 1;
++	dev->lun_num = onfi[i].lun_num;
++	dev->plane_num = BIT(onfi[i].plane_address_bits);
++	dev->block_num = onfi[i].lun_blocks / dev->plane_num;
++	dev->block_size = onfi[i].block_pages * onfi[i].page_size;
++	dev->page_size = onfi[i].page_size;
++	dev->spare_size = onfi[i].spare_size;
++
++	endurance->ecc_req = onfi[i].ecc_req;
++	endurance->pe_cycle = onfi[i].valid_block_endurance;
++	endurance->max_bitflips = endurance->ecc_req >> 1;
++
++	return 0;
++}
++
++static int detect_jedec(struct nand_device *dev,
++			struct nand_jedec_params *jedec)
++{
++	struct nand_endurance *endurance = dev->endurance;
++	u16 size, i, crc16;
++	u8 *id;
++
++	size = sizeof(struct nand_jedec_params) - sizeof(u16);
++
++	for (i = 0; i < 3; i++) {
++		crc16 = nand_onfi_crc16(ONFI_CRC_BASE, (u8 *)&jedec[i], size);
++
++		if (jedec[i].signature[0] == 'J' &&
++		    jedec[i].signature[1] == 'E' &&
++		    jedec[i].signature[2] == 'S' &&
++		    jedec[i].signature[3] == 'D' &&
++		    jedec[i].crc16 == crc16)
++			break;
++	}
++
++	if (i == 3)
++		return -ENODEV;
++
++	memcpy(dev->name, jedec[i].model, 20);
++	id = jedec[i].manufacturer;
++	dev->id = NAND_PACK_ID(id[0], id[1], id[2], id[3], id[4], id[5], id[6],
++			       id[7]);
++	dev->id_len = MAX_ID_NUM;
++	dev->io_width = (jedec[i].features & 1) ? NAND_IO16 : NAND_IO8;
++	decode_addr_cycle(jedec[i].addr_cycle, &dev->row_cycle,
++			  &dev->col_cycle);
++	dev->target_num = 1;
++	dev->lun_num = jedec[i].lun_num;
++	dev->plane_num = BIT(jedec[i].plane_address_bits);
++	dev->block_num = jedec[i].lun_blocks / dev->plane_num;
++	dev->block_size = jedec[i].block_pages * jedec[i].page_size;
++	dev->page_size = jedec[i].page_size;
++	dev->spare_size = jedec[i].spare_size;
++
++	endurance->ecc_req = jedec[i].endurance_block0[0];
++	endurance->pe_cycle = jedec[i].valid_block_endurance;
++	endurance->max_bitflips = endurance->ecc_req >> 1;
++
++	return 0;
++}
++
++static struct nand_device *detect_parameters_page(struct nand_base
++						  *nand)
++{
++	struct nand_device *dev = nand->dev;
++	void *params;
++	int ret;
++
++	params = mem_alloc(1, PARAM_PAGE_LEN);
++	if (!params)
++		return NULL;
++
++	memset(params, 0, PARAM_PAGE_LEN);
++	ret = nand->read_param_page(nand, params, PARAM_PAGE_LEN);
++	if (ret < 0) {
++		pr_info("read parameters page fail!\n");
++		goto error;
++	}
++
++	ret = detect_onfi(dev, params);
++	if (ret) {
++		pr_info("detect onfi device fail! try to detect jedec\n");
++		ret = detect_jedec(dev, params);
++		if (ret) {
++			pr_info("detect jedec device fail!\n");
++			goto error;
++		}
++	}
++
++	mem_free(params);
++	return dev;
++
++error:
++	mem_free(params);
++	return NULL;
++}
++
++static int read_device_id(struct nand_base *nand, int cs, u8 *id)
++{
++	int i;
++
++	nand->select_device(nand, cs);
++	nand->reset(nand);
++	nand->read_id(nand, id, MAX_ID_NUM);
++	pr_info("device %d ID: ", cs);
++
++	for (i = 0; i < MAX_ID_NUM; i++)
++		pr_info("%x ", id[i]);
++
++	pr_info("\n");
++
++	return 0;
++}
++
++static int detect_more_device(struct nand_base *nand, u8 *id)
++{
++	u8 id_ext[MAX_ID_NUM];
++	int i, j, target_num = 0;
++
++	for (i = 1; i < MAX_CHIP_DEVICE; i++) {
++		memset(id_ext, 0xff, MAX_ID_NUM);
++		read_device_id(nand, i, id_ext);
++
++		for (j = 0; j < MAX_ID_NUM; j++) {
++			if (id_ext[j] != id[j])
++				goto out;
++		}
++
++		target_num += 1;
++	}
++
++out:
++	return target_num;
++}
++
++static struct nand_device *scan_device_table(const u8 *id, int id_len)
++{
++	struct nand_device *dev;
++	int i = 0, j;
++	u8 ids[MAX_ID_NUM] = {0};
++
++	while (1) {
++		dev = nand_get_device(i);
++
++		if (!strcmp(dev->name, "NO-DEVICE"))
++			break;
++
++		if (id_len < dev->id_len) {
++			i += 1;
++			continue;
++		}
++
++		NAND_UNPACK_ID(dev->id, ids, MAX_ID_NUM);
++		for (j = 0; j < dev->id_len; j++) {
++			if (ids[j] != id[j])
++				break;
++		}
++
++		if (j == dev->id_len)
++			break;
++
++		i += 1;
++	}
++
++	return dev;
++}
++
++int nand_detect_device(struct nand_base *nand)
++{
++	struct nand_device *dev;
++	u8 id[MAX_ID_NUM] = { 0 };
++	int target_num = 0;
++
++	/* Get nand device default setting for reset/read_id */
++	nand->dev = scan_device_table(NULL, -1);
++
++	read_device_id(nand, 0, id);
++	dev = scan_device_table(id, MAX_ID_NUM);
++
++	if (!strcmp(dev->name, "NO-DEVICE")) {
++		pr_info("device scan fail\n");
++		return -ENODEV;
++	}
++
++	/* TobeFix: has null pointer issue in this funciton */
++	if (!strcmp(dev->name, "NO-DEVICE")) {
++		pr_info("device scan fail, detect parameters page\n");
++		dev = detect_parameters_page(nand);
++		if (!dev) {
++			pr_info("detect parameters fail\n");
++			return -ENODEV;
++		}
++	}
++
++	if (dev->target_num > 1)
++		target_num = detect_more_device(nand, id);
++
++	target_num += 1;
++	pr_debug("chip has target device num: %d\n", target_num);
++
++	if (dev->target_num != target_num)
++		dev->target_num = target_num;
++
++	nand->dev = dev;
++
++	return 0;
++}
++
+diff --git a/drivers/mtd/nandx/core/nand_device.h b/drivers/mtd/nandx/core/nand_device.h
+new file mode 100644
+index 0000000000..e142cf529d
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nand_device.h
+@@ -0,0 +1,608 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NAND_DEVICE_H__
++#define __NAND_DEVICE_H__
++
++/* onfi 3.2 */
++struct nand_onfi_params {
++	/* Revision information and features block. 0 */
++	/*
++	 * Byte 0: 4Fh,
++	 * Byte 1: 4Eh,
++	 * Byte 2: 46h,
++	 * Byte 3: 49h,
++	 */
++	u8 signature[4];
++	/*
++	 * 9-15 Reserved (0)
++	 * 8 1 = supports ONFI version 3.2
++	 * 7 1 = supports ONFI version 3.1
++	 * 6 1 = supports ONFI version 3.0
++	 * 5 1 = supports ONFI version 2.3
++	 * 4 1 = supports ONFI version 2.2
++	 * 3 1 = supports ONFI version 2.1
++	 * 2 1 = supports ONFI version 2.0
++	 * 1 1 = supports ONFI version 1.0
++	 * 0 Reserved (0)
++	 */
++	u16 revision;
++	/*
++	 * 13-15 Reserved (0)
++	 * 12 1 = supports external Vpp
++	 * 11 1 = supports Volume addressing
++	 * 10 1 = supports NV-DDR2
++	 * 9 1 = supports EZ NAND
++	 * 8 1 = supports program page register clear enhancement
++	 * 7 1 = supports extended parameter page
++	 * 6 1 = supports multi-plane read operations
++	 * 5 1 = supports NV-DDR
++	 * 4 1 = supports odd to even page Copyback
++	 * 3 1 = supports multi-plane program and erase operations
++	 * 2 1 = supports non-sequential page programming
++	 * 1 1 = supports multiple LUN operations
++	 * 0 1 = supports 16-bit data bus width
++	 */
++	u16 features;
++	/*
++	 * 13-15 Reserved (0)
++	 * 12 1 = supports LUN Get and LUN Set Features
++	 * 11 1 = supports ODT Configure
++	 * 10 1 = supports Volume Select
++	 * 9 1 = supports Reset LUN
++	 * 8 1 = supports Small Data Move
++	 * 7 1 = supports Change Row Address
++	 * 6 1 = supports Change Read Column Enhanced
++	 * 5 1 = supports Read Unique ID
++	 * 4 1 = supports Copyback
++	 * 3 1 = supports Read Status Enhanced
++	 * 2 1 = supports Get Features and Set Features
++	 * 1 1 = supports Read Cache commands
++	 * 0 1 = supports Page Cache Program command
++	 */
++	u16 opt_cmds;
++	/*
++	 * 4-7 Reserved (0)
++	 * 3 1 = supports Multi-plane Block Erase
++	 * 2 1 = supports Multi-plane Copyback Program
++	 * 1 1 = supports Multi-plane Page Program
++	 * 0 1 = supports Random Data Out
++	 */
++	u8 advance_cmds;
++	u8 reserved0[1];
++	u16 extend_param_len;
++	u8 param_page_num;
++	u8 reserved1[17];
++
++	/* Manufacturer information block. 32 */
++	u8 manufacturer[12];
++	u8 model[20];
++	u8 jedec_id;
++	u16 data_code;
++	u8 reserved2[13];
++
++	/* Memory organization block. 80 */
++	u32 page_size;
++	u16 spare_size;
++	u32 partial_page_size; /* obsolete */
++	u16 partial_spare_size; /* obsolete */
++	u32 block_pages;
++	u32 lun_blocks;
++	u8 lun_num;
++	/*
++	 * 4-7 Column address cycles
++	 * 0-3 Row address cycles
++	 */
++	u8 addr_cycle;
++	u8 cell_bits;
++	u16 lun_max_bad_blocks;
++	u16 block_endurance;
++	u8 target_begin_valid_blocks;
++	u16 valid_block_endurance;
++	u8 page_program_num;
++	u8 partial_program_attr; /* obsolete */
++	u8 ecc_req;
++	/*
++	 * 4-7 Reserved (0)
++	 * 0-3 Number of plane address bits
++	 */
++	u8 plane_address_bits;
++	/*
++	 * 6-7 Reserved (0)
++	 * 5 1 = lower bit XNOR block address restriction
++	 * 4 1 = read cache supported
++	 * 3 Address restrictions for cache operations
++	 * 2 1 = program cache supported
++	 * 1 1 = no block address restrictions
++	 * 0 Overlapped / concurrent multi-plane support
++	 */
++	u8 multi_plane_attr;
++	u8 ez_nand_support;
++	u8 reserved3[12];
++
++	/* Electrical parameters block. 128 */
++	u8 io_pin_max_capacitance;
++	/*
++	 * 6-15 Reserved (0)
++	 * 5 1 = supports timing mode 5
++	 * 4 1 = supports timing mode 4
++	 * 3 1 = supports timing mode 3
++	 * 2 1 = supports timing mode 2
++	 * 1 1 = supports timing mode 1
++	 * 0 1 = supports timing mode 0, shall be 1
++	 */
++	u16 sdr_timing_mode;
++	u16 sdr_program_cache_timing_mode; /* obsolete */
++	u16 tPROG;
++	u16 tBERS;
++	u16 tR;
++	u16 tCCS;
++	/*
++	 * 7 Reserved (0)
++	 * 6 1 = supports NV-DDR2 timing mode 8
++	 * 5 1 = supports NV-DDR timing mode 5
++	 * 4 1 = supports NV-DDR timing mode 4
++	 * 3 1 = supports NV-DDR timing mode 3
++	 * 2 1 = supports NV-DDR timing mode 2
++	 * 1 1 = supports NV-DDR timing mode 1
++	 * 0 1 = supports NV-DDR timing mode 0
++	 */
++	u8 nvddr_timing_mode;
++	/*
++	 * 7 1 = supports timing mode 7
++	 * 6 1 = supports timing mode 6
++	 * 5 1 = supports timing mode 5
++	 * 4 1 = supports timing mode 4
++	 * 3 1 = supports timing mode 3
++	 * 2 1 = supports timing mode 2
++	 * 1 1 = supports timing mode 1
++	 * 0 1 = supports timing mode 0
++	 */
++	u8 nvddr2_timing_mode;
++	/*
++	 * 4-7 Reserved (0)
++	 * 3 1 = device requires Vpp enablement sequence
++	 * 2 1 = device supports CLK stopped for data input
++	 * 1 1 = typical capacitance
++	 * 0 tCAD value to use
++	 */
++	u8 nvddr_fetures;
++	u16 clk_pin_capacitance;
++	u16 io_pin_capacitance;
++	u16 input_pin_capacitance;
++	u8 input_pin_max_capacitance;
++	/*
++	 * 3-7 Reserved (0)
++	 * 2 1 = supports 18 Ohm drive strength
++	 * 1 1 = supports 25 Ohm drive strength
++	 * 0 1 = supports driver strength settings
++	 */
++	u8 drive_strength;
++	u16 tR_multi_plane;
++	u16 tADL;
++	u16 tR_ez_nand;
++	/*
++	 * 6-7 Reserved (0)
++	 * 5 1 = external VREFQ required for >= 200 MT/s
++	 * 4 1 = supports differential signaling for DQS
++	 * 3 1 = supports differential signaling for RE_n
++	 * 2 1 = supports ODT value of 30 Ohms
++	 * 1 1 = supports matrix termination ODT
++	 * 0 1 = supports self-termination ODT
++	 */
++	u8 nvddr2_features;
++	u8 nvddr2_warmup_cycles;
++	u8 reserved4[4];
++
++	/* vendor block. 164 */
++	u16 vendor_revision;
++	u8      vendor_spec[88];
++
++	/* CRC for Parameter Page. 254 */
++	u16 crc16;
++} __packed;
++
++/* JESD230-B */
++struct nand_jedec_params {
++	/* Revision information and features block. 0 */
++	/*
++	 * Byte 0:4Ah
++	 * Byte 1:45h
++	 * Byte 2:53h
++	 * Byte 3:44h
++	 */
++	u8 signature[4];
++	/*
++	 * 3-15: Reserved (0)
++	 * 2: 1 = supports parameter page revision 1.0 and standard revision 1.0
++	 * 1: 1 = supports vendor specific parameter page
++	 * 0: Reserved (0)
++	 */
++	u16 revision;
++	/*
++	 * 9-15 Reserved (0)
++	 * 8: 1 = supports program page register clear enhancement
++	 * 7: 1 = supports external Vpp
++	 * 6: 1 = supports Toggle Mode DDR
++	 * 5: 1 = supports Synchronous DDR
++	 * 4: 1 = supports multi-plane read operations
++	 * 3: 1 = supports multi-plane program and erase operations
++	 * 2: 1 = supports non-sequential page programming
++	 * 1: 1 = supports multiple LUN operations
++	 * 0: 1 = supports 16-bit data bus width
++	 */
++	u16 features;
++	/*
++	 * 11-23: Reserved (0)
++	 * 10: 1 = supports Synchronous Reset
++	 * 9: 1 = supports Reset LUN (Primary)
++	 * 8: 1 = supports Small Data Move
++	 * 7: 1 = supports Multi-plane Copyback Program (Primary)
++	 * 6: 1 = supports Random Data Out (Primary)
++	 * 5: 1 = supports Read Unique ID
++	 * 4: 1 = supports Copyback
++	 * 3: 1 = supports Read Status Enhanced (Primary)
++	 * 2: 1 = supports Get Features and Set Features
++	 * 1: 1 = supports Read Cache commands
++	 * 0: 1 = supports Page Cache Program command
++	 */
++	u8 opt_cmds[3];
++	/*
++	 * 8-15: Reserved (0)
++	 * 7: 1 = supports secondary Read Status Enhanced
++	 * 6: 1 = supports secondary Multi-plane Block Erase
++	 * 5: 1 = supports secondary Multi-plane Copyback Program
++	 * 4: 1 = supports secondary Multi-plane Program
++	 * 3: 1 = supports secondary Random Data Out
++	 * 2: 1 = supports secondary Multi-plane Copyback Read
++	 * 1: 1 = supports secondary Multi-plane Read Cache Random
++	 * 0: 1 = supports secondary Multi-plane Read
++	 */
++	u16 secondary_cmds;
++	u8 param_page_num;
++	u8 reserved0[18];
++
++	/* Manufacturer information block. 32*/
++	u8 manufacturer[12];
++	u8 model[20];
++	u8 jedec_id[6];
++	u8 reserved1[10];
++
++	/* Memory organization block. 80 */
++	u32 page_size;
++	u16 spare_size;
++	u8 reserved2[6];
++	u32 block_pages;
++	u32 lun_blocks;
++	u8 lun_num;
++	/*
++	 * 4-7 Column address cycles
++	 * 0-3 Row address cycles
++	 */
++	u8 addr_cycle;
++	u8 cell_bits;
++	u8 page_program_num;
++	/*
++	 * 4-7 Reserved (0)
++	 * 0-3 Number of plane address bits
++	 */
++	u8 plane_address_bits;
++	/*
++	 * 3-7: Reserved (0)
++	 * 2: 1= read cache supported
++	 * 1: 1 = program cache supported
++	 * 0: 1= No multi-plane block address restrictions
++	 */
++	u8 multi_plane_attr;
++	u8 reserved3[38];
++
++	/* Electrical parameters block. 144 */
++	/*
++	 * 6-15: Reserved (0)
++	 * 5: 1 = supports 20 ns speed grade (50 MHz)
++	 * 4: 1 = supports 25 ns speed grade (40 MHz)
++	 * 3: 1 = supports 30 ns speed grade (~33 MHz)
++	 * 2: 1 = supports 35 ns speed grade (~28 MHz)
++	 * 1: 1 = supports 50 ns speed grade (20 MHz)
++	 * 0: 1 = supports 100 ns speed grade (10 MHz)
++	 */
++	u16 sdr_speed;
++	/*
++	 * 8-15: Reserved (0)
++	 * 7: 1 = supports 5 ns speed grade (200 MHz)
++	 * 6: 1 = supports 6 ns speed grade (~166 MHz)
++	 * 5: 1 = supports 7.5 ns speed grade (~133 MHz)
++	 * 4: 1 = supports 10 ns speed grade (100 MHz)
++	 * 3: 1 = supports 12 ns speed grade (~83 MHz)
++	 * 2: 1 = supports 15 ns speed grade (~66 MHz)
++	 * 1: 1 = supports 25 ns speed grade (40 MHz)
++	 * 0: 1 = supports 30 ns speed grade (~33 MHz)
++	 */
++	u16 toggle_ddr_speed;
++	/*
++	 * 6-15: Reserved (0)
++	 * 5: 1 = supports 10 ns speed grade (100 MHz)
++	 * 4: 1 = supports 12 ns speed grade (~83 MHz)
++	 * 3: 1 = supports 15 ns speed grade (~66 MHz)
++	 * 2: 1 = supports 20 ns speed grade (50 MHz)
++	 * 1: 1 = supports 30 ns speed grade (~33 MHz)
++	 * 0: 1 = supports 50 ns speed grade (20 MHz)
++	 */
++	u16 sync_ddr_speed;
++	u8 sdr_features;
++	u8 toggle_ddr_features;
++	/*
++	 * 2-7: Reserved (0)
++	 * 1: Device supports CK stopped for data input
++	 * 0: tCAD value to use
++	 */
++	u8 sync_ddr_features;
++	u16 tPROG;
++	u16 tBERS;
++	u16 tR;
++	u16 tR_multi_plane;
++	u16 tCCS;
++	u16 io_pin_capacitance;
++	u16 input_pin_capacitance;
++	u16 ck_pin_capacitance;
++	/*
++	 * 3-7: Reserved (0)
++	 * 2: 1 = supports 18 ohm drive strength
++	 * 1: 1 = supports 25 ohm drive strength
++	 * 0: 1 = supports 35ohm/50ohm drive strength
++	 */
++	u8 drive_strength;
++	u16 tADL;
++	u8 reserved4[36];
++
++	/* ECC and endurance block. 208 */
++	u8 target_begin_valid_blocks;
++	u16 valid_block_endurance;
++	/*
++	 * Byte 0: Number of bits ECC correctability
++	 * Byte 1: Codeword size
++	 * Byte 2-3: Bad blocks maximum per LUN
++	 * Byte 4-5: Block endurance
++	 * Byte 6-7: Reserved (0)
++	 */
++	u8 endurance_block0[8];
++	u8 endurance_block1[8];
++	u8 endurance_block2[8];
++	u8 endurance_block3[8];
++	u8 reserved5[29];
++
++	/* Reserved. 272 */
++	u8 reserved6[148];
++
++	/* Vendor specific block. 420  */
++	u16 vendor_revision;
++	u8      vendor_spec[88];
++
++	/* CRC for Parameter Page. 510 */
++	u16 crc16;
++} __packed;
++
++/* parallel nand io width */
++enum nand_io_width {
++	NAND_IO8,
++	NAND_IO16
++};
++
++/* all supported nand timming type */
++enum nand_timing_type {
++	NAND_TIMING_SDR,
++	NAND_TIMING_SYNC_DDR,
++	NAND_TIMING_TOGGLE_DDR,
++	NAND_TIMING_NVDDR2
++};
++
++/* nand basic commands */
++struct nand_cmds {
++	short reset;
++	short read_id;
++	short read_status;
++	short read_param_page;
++	short set_feature;
++	short get_feature;
++	short read_1st;
++	short read_2nd;
++	short random_out_1st;
++	short random_out_2nd;
++	short program_1st;
++	short program_2nd;
++	short erase_1st;
++	short erase_2nd;
++	short read_cache;
++	short read_cache_last;
++	short program_cache;
++};
++
++/*
++ * addressing for nand physical address
++ * @row_bit_start: row address start bit
++ * @block_bit_start: block address start bit
++ * @plane_bit_start: plane address start bit
++ * @lun_bit_start: lun address start bit
++ */
++struct nand_addressing {
++	u8 row_bit_start;
++	u8 block_bit_start;
++	u8 plane_bit_start;
++	u8 lun_bit_start;
++};
++
++/*
++ * nand operations status
++ * @array_busy: indicates device array operation busy
++ * @write_protect: indicates the device cannot be wrote or erased
++ * @erase_fail: indicates erase operation fail
++ * @program_fail: indicates program operation fail
++ */
++struct nand_status {
++	u8 array_busy;
++	u8 write_protect;
++	u8 erase_fail;
++	u8 program_fail;
++};
++
++/*
++ * nand endurance information
++ * @pe_cycle: max program/erase cycle for nand stored data stability
++ * @ecc_req: ecc strength required for the nand, measured per 1KB
++ * @max_bitflips: bitflips is ecc corrected bits,
++ *    max_bitflips is the threshold for nand stored data stability
++ *    if corrected bits is over max_bitflips, stored data must be moved
++ *    to another good block
++ */
++struct nand_endurance {
++	int pe_cycle;
++	int ecc_req;
++	int max_bitflips;
++};
++
++/* wait for nand busy type */
++enum nand_wait_type {
++	NAND_WAIT_IRQ,
++	NAND_WAIT_POLLING,
++	NAND_WAIT_TWHR2,
++};
++
++/* each nand array operations time */
++struct nand_array_timing {
++	u16 tRST;
++	u16 tWHR;
++	u16 tR;
++	u16 tRCBSY;
++	u16 tFEAT;
++	u16 tPROG;
++	u16 tPCBSY;
++	u16 tBERS;
++	u16 tDBSY;
++};
++
++/* nand sdr interface timing required */
++struct nand_sdr_timing {
++	u16 tREA;
++	u16 tREH;
++	u16 tCR;
++	u16 tRP;
++	u16 tWP;
++	u16 tWH;
++	u16 tWHR;
++	u16 tCLS;
++	u16 tALS;
++	u16 tCLH;
++	u16 tALH;
++	u16 tWC;
++	u16 tRC;
++};
++
++/* nand onfi ddr (nvddr) interface timing required */
++struct nand_onfi_timing {
++	u16 tCAD;
++	u16 tWPRE;
++	u16 tWPST;
++	u16 tWRCK;
++	u16 tDQSCK;
++	u16 tWHR;
++};
++
++/* nand toggle ddr (toggle 1.0) interface timing required */
++struct nand_toggle_timing {
++	u16 tCS;
++	u16 tCH;
++	u16 tCAS;
++	u16 tCAH;
++	u16 tCALS;
++	u16 tCALH;
++	u16 tWP;
++	u16 tWPRE;
++	u16 tWPST;
++	u16 tWPSTH;
++	u16 tCR;
++	u16 tRPRE;
++	u16 tRPST;
++	u16 tRPSTH;
++	u16 tCDQSS;
++	u16 tWHR;
++};
++
++/* nand basic device information */
++struct nand_device {
++	u8 *name;
++	u64 id;
++	u8 id_len;
++	u8 io_width;
++	u8 row_cycle;
++	u8 col_cycle;
++	u8 target_num;
++	u8 lun_num;
++	u8 plane_num;
++	int block_num;
++	int block_size;
++	int page_size;
++	int spare_size;
++	int min_program_pages;
++	struct nand_cmds *cmds;
++	struct nand_addressing *addressing;
++	struct nand_status *status;
++	struct nand_endurance *endurance;
++	struct nand_array_timing *array_timing;
++};
++
++#define NAND_DEVICE(_name, _id, _id_len, _io_width, _row_cycle, \
++		    _col_cycle, _target_num, _lun_num, _plane_num, \
++		    _block_num, _block_size, _page_size, _spare_size, \
++		    _min_program_pages, _cmds, _addressing, _status, \
++		    _endurance, _array_timing) \
++{ \
++	_name, _id, _id_len, _io_width, _row_cycle, \
++	_col_cycle, _target_num, _lun_num, _plane_num, \
++	_block_num, _block_size, _page_size, _spare_size, \
++	_min_program_pages, _cmds, _addressing, _status, \
++	_endurance, _array_timing \
++}
++
++#define MAX_ID_NUM      sizeof(u64)
++
++#define NAND_PACK_ID(id0, id1, id2, id3, id4, id5, id6, id7) \
++	( \
++	  id0 | id1 << 8 | id2 << 16 | id3 << 24 | \
++	  (u64)id4 << 32 | (u64)id5 << 40 | \
++	  (u64)id6 << 48 | (u64)id7 << 56 \
++	)
++
++#define NAND_UNPACK_ID(id, ids, len) \
++	do { \
++		int _i; \
++		for (_i = 0; _i < len; _i++) \
++			ids[_i] = id >> (_i << 3) & 0xff; \
++	} while (0)
++
++static inline int nand_block_pages(struct nand_device *device)
++{
++	return div_down(device->block_size, device->page_size);
++}
++
++static inline int nand_lun_blocks(struct nand_device *device)
++{
++	return device->plane_num * device->block_num;
++}
++
++static inline int nand_target_blocks(struct nand_device *device)
++{
++	return device->lun_num * device->plane_num * device->block_num;
++}
++
++static inline int nand_total_blocks(struct nand_device *device)
++{
++	return device->target_num * device->lun_num * device->plane_num *
++	       device->block_num;
++}
++
++struct nand_device *nand_get_device(int index);
++#endif /* __NAND_DEVICE_H__ */
+diff --git a/drivers/mtd/nandx/core/nfi.h b/drivers/mtd/nandx/core/nfi.h
+new file mode 100644
+index 0000000000..ba84e73ccc
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi.h
+@@ -0,0 +1,51 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFI_H__
++#define __NFI_H__
++
++struct nfi_format {
++	int page_size;
++	int spare_size;
++	int ecc_req;
++};
++
++struct nfi {
++	int sector_size;
++	int sector_spare_size;
++	int fdm_size; /*for sector*/
++	int fdm_ecc_size;
++	int ecc_strength;
++	int ecc_parity_size; /*for sector*/
++
++	int (*select_chip)(struct nfi *nfi, int cs);
++	int (*set_format)(struct nfi *nfi, struct nfi_format *format);
++	int (*set_timing)(struct nfi *nfi, void *timing, int type);
++	int (*nfi_ctrl)(struct nfi *nfi, int cmd, void *args);
++
++	int (*reset)(struct nfi *nfi);
++	int (*send_cmd)(struct nfi *nfi, short cmd);
++	int (*send_addr)(struct nfi *nfi, int col, int row,
++			 int col_cycle, int row_cycle);
++	int (*trigger)(struct nfi *nfi);
++
++	int (*write_page)(struct nfi *nfi, u8 *data, u8 *fdm);
++	int (*write_bytes)(struct nfi *nfi, u8 *data, int count);
++	int (*read_sectors)(struct nfi *nfi, u8 *data, u8 *fdm,
++			    int sectors);
++	int (*read_bytes)(struct nfi *nfi, u8 *data, int count);
++
++	int (*wait_ready)(struct nfi *nfi, int type, u32 timeout);
++
++	int (*enable_randomizer)(struct nfi *nfi, u32 row, bool encode);
++	int (*disable_randomizer)(struct nfi *nfi);
++};
++
++struct nfi *nfi_init(struct nfi_resource *res);
++void nfi_exit(struct nfi *nfi);
++
++#endif /* __NFI_H__ */
+diff --git a/drivers/mtd/nandx/core/nfi/nfi_base.c b/drivers/mtd/nandx/core/nfi/nfi_base.c
+new file mode 100644
+index 0000000000..d8679d7aa3
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfi_base.c
+@@ -0,0 +1,1357 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++/**
++ * nfi_base.c - the base logic for nfi to access nand flash
++ *
++ * slc/mlc/tlc could use same code to access nand
++ * of cause, there still some work need to do
++ * even for spi nand, there should be a chance to integrate code together
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "../nfi.h"
++#include "../nand_device.h"
++#include "nfi_regs.h"
++#include "nfiecc.h"
++#include "nfi_base.h"
++
++static const int spare_size_mt7622[] = {
++	16, 26, 27, 28
++};
++
++#define RAND_SEED_SHIFT(op) \
++	((op) == RAND_ENCODE ? ENCODE_SEED_SHIFT : DECODE_SEED_SHIFT)
++#define RAND_EN(op) \
++	((op) == RAND_ENCODE ? RAN_ENCODE_EN : RAN_DECODE_EN)
++
++#define SS_SEED_NUM     128
++static u16 ss_randomizer_seed[SS_SEED_NUM] = {
++	0x576A, 0x05E8, 0x629D, 0x45A3, 0x649C, 0x4BF0, 0x2342, 0x272E,
++	0x7358, 0x4FF3, 0x73EC, 0x5F70, 0x7A60, 0x1AD8, 0x3472, 0x3612,
++	0x224F, 0x0454, 0x030E, 0x70A5, 0x7809, 0x2521, 0x484F, 0x5A2D,
++	0x492A, 0x043D, 0x7F61, 0x3969, 0x517A, 0x3B42, 0x769D, 0x0647,
++	0x7E2A, 0x1383, 0x49D9, 0x07B8, 0x2578, 0x4EEC, 0x4423, 0x352F,
++	0x5B22, 0x72B9, 0x367B, 0x24B6, 0x7E8E, 0x2318, 0x6BD0, 0x5519,
++	0x1783, 0x18A7, 0x7B6E, 0x7602, 0x4B7F, 0x3648, 0x2C53, 0x6B99,
++	0x0C23, 0x67CF, 0x7E0E, 0x4D8C, 0x5079, 0x209D, 0x244A, 0x747B,
++	0x350B, 0x0E4D, 0x7004, 0x6AC3, 0x7F3E, 0x21F5, 0x7A15, 0x2379,
++	0x1517, 0x1ABA, 0x4E77, 0x15A1, 0x04FA, 0x2D61, 0x253A, 0x1302,
++	0x1F63, 0x5AB3, 0x049A, 0x5AE8, 0x1CD7, 0x4A00, 0x30C8, 0x3247,
++	0x729C, 0x5034, 0x2B0E, 0x57F2, 0x00E4, 0x575B, 0x6192, 0x38F8,
++	0x2F6A, 0x0C14, 0x45FC, 0x41DF, 0x38DA, 0x7AE1, 0x7322, 0x62DF,
++	0x5E39, 0x0E64, 0x6D85, 0x5951, 0x5937, 0x6281, 0x33A1, 0x6A32,
++	0x3A5A, 0x2BAC, 0x743A, 0x5E74, 0x3B2E, 0x7EC7, 0x4FD2, 0x5D28,
++	0x751F, 0x3EF8, 0x39B1, 0x4E49, 0x746B, 0x6EF6, 0x44BE, 0x6DB7
++};
++
++#if 0
++static void dump_register(void *regs)
++{
++	int i;
++
++	pr_info("registers:\n");
++	for (i = 0; i < 0x600; i += 0x10) {
++		pr_info("    address 0x%X : %X %X %X %X\n",
++			(u32)((unsigned long)regs + i),
++			(u32)readl(regs + i),
++			(u32)readl(regs + i + 0x4),
++			(u32)readl(regs + i + 0x8),
++			(u32)readl(regs + i + 0xC));
++	}
++}
++#endif
++
++static int nfi_enable_randomizer(struct nfi *nfi, u32 row, bool encode)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	enum randomizer_op op = RAND_ENCODE;
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	if (!encode)
++		op = RAND_DECODE;
++
++	/* randomizer type and reseed type setup */
++	val = readl(regs + NFI_CNFG);
++	val |= CNFG_RAND_SEL | CNFG_RESEED_SEC_EN;
++	writel(val, regs + NFI_CNFG);
++
++	/* randomizer seed and type setup */
++	val = ss_randomizer_seed[row % SS_SEED_NUM] & RAN_SEED_MASK;
++	val <<= RAND_SEED_SHIFT(op);
++	val |= RAND_EN(op);
++	writel(val, regs + NFI_RANDOM_CNFG);
++
++	return 0;
++}
++
++static int nfi_disable_randomizer(struct nfi *nfi)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++
++	writel(0, nb->res.nfi_regs + NFI_RANDOM_CNFG);
++
++	return 0;
++}
++
++static int nfi_irq_handler(int irq, void *data)
++{
++	struct nfi_base *nb = (struct nfi_base *) data;
++	void *regs = nb->res.nfi_regs;
++	u16 status, en;
++
++	status = readw(regs + NFI_INTR_STA);
++	en = readw(regs + NFI_INTR_EN);
++
++	if (!(status & en))
++		return NAND_IRQ_NONE;
++
++	writew(~status & en, regs + NFI_INTR_EN);
++
++	nandx_event_complete(nb->done);
++
++	return NAND_IRQ_HANDLED;
++}
++
++static int nfi_select_chip(struct nfi *nfi, int cs)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++
++	writel(cs, nb->res.nfi_regs + NFI_CSEL);
++
++	return 0;
++}
++
++static inline void set_op_mode(void *regs, u32 mode)
++{
++	u32 val = readl(regs + NFI_CNFG);
++
++	val &= ~CNFG_OP_MODE_MASK;
++	val |= mode;
++
++	writel(val, regs + NFI_CNFG);
++}
++
++static int nfi_reset(struct nfi *nfi)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	void *regs = nb->res.nfi_regs;
++	int ret, val;
++
++	/* The NFI reset to reset all registers and force the NFI
++	 * master be early terminated
++	 */
++	writel(CON_FIFO_FLUSH | CON_NFI_RST, regs + NFI_CON);
++
++	/* check state of NFI internal FSM and NAND interface FSM */
++	ret = readl_poll_timeout_atomic(regs + NFI_MASTER_STA, val,
++					!(val & MASTER_BUS_BUSY),
++					10, NFI_TIMEOUT);
++	if (ret)
++		pr_info("nfi reset timeout...\n");
++
++	writel(CON_FIFO_FLUSH | CON_NFI_RST, regs + NFI_CON);
++	writew(STAR_DE, regs + NFI_STRDATA);
++
++	return ret;
++}
++
++static void bad_mark_swap(struct nfi *nfi, u8 *buf, u8 *fdm)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	u32 start_sector = div_down(nb->col, nfi->sector_size);
++	u32 data_mark_pos;
++	u8 temp;
++
++	/* raw access, no need to do swap. */
++	if (!nb->ecc_en)
++		return;
++
++	if (!buf || !fdm)
++		return;
++
++	if (nb->bad_mark_ctrl.sector < start_sector ||
++	    nb->bad_mark_ctrl.sector > start_sector + nb->rw_sectors)
++		return;
++
++	data_mark_pos = nb->bad_mark_ctrl.position +
++			(nb->bad_mark_ctrl.sector - start_sector) *
++			nfi->sector_size;
++
++	temp = *fdm;
++	*fdm = *(buf + data_mark_pos);
++	*(buf + data_mark_pos) = temp;
++}
++
++static u8 *fdm_shift(struct nfi *nfi, u8 *fdm, int sector)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	u8 *pos;
++
++	if (!fdm)
++		return NULL;
++
++	/* map the sector's FDM data to free oob:
++	 * the beginning of the oob area stores the FDM data of bad mark sectors
++	 */
++	if (sector < nb->bad_mark_ctrl.sector)
++		pos = fdm + (sector + 1) * nfi->fdm_size;
++	else if (sector == nb->bad_mark_ctrl.sector)
++		pos = fdm;
++	else
++		pos = fdm + sector * nfi->fdm_size;
++
++	return pos;
++
++}
++
++static void set_bad_mark_ctrl(struct nfi_base *nb)
++{
++	int temp, page_size = nb->format.page_size;
++
++	nb->bad_mark_ctrl.bad_mark_swap = bad_mark_swap;
++	nb->bad_mark_ctrl.fdm_shift = fdm_shift;
++
++	temp = nb->nfi.sector_size + nb->nfi.sector_spare_size;
++	nb->bad_mark_ctrl.sector = div_down(page_size, temp);
++	nb->bad_mark_ctrl.position = reminder(page_size, temp);
++}
++
++/* NOTE: check if page_size valid future */
++static int setup_format(struct nfi_base *nb, int spare_idx)
++{
++	struct nfi *nfi = &nb->nfi;
++	u32 page_size = nb->format.page_size;
++	u32 val;
++
++	switch (page_size) {
++	case 512:
++		val = PAGEFMT_512_2K | PAGEFMT_SEC_SEL_512;
++		break;
++
++	case KB(2):
++		if (nfi->sector_size == 512)
++			val = PAGEFMT_2K_4K | PAGEFMT_SEC_SEL_512;
++		else
++			val = PAGEFMT_512_2K;
++
++		break;
++
++	case KB(4):
++		if (nfi->sector_size == 512)
++			val = PAGEFMT_4K_8K | PAGEFMT_SEC_SEL_512;
++		else
++			val = PAGEFMT_2K_4K;
++
++		break;
++
++	case KB(8):
++		if (nfi->sector_size == 512)
++			val = PAGEFMT_8K_16K | PAGEFMT_SEC_SEL_512;
++		else
++			val = PAGEFMT_4K_8K;
++
++		break;
++
++	case KB(16):
++		val = PAGEFMT_8K_16K;
++		break;
++
++	default:
++		pr_info("invalid page len: %d\n", page_size);
++		return -EINVAL;
++	}
++
++	val |= spare_idx << PAGEFMT_SPARE_SHIFT;
++	val |= nfi->fdm_size << PAGEFMT_FDM_SHIFT;
++	val |= nfi->fdm_ecc_size << PAGEFMT_FDM_ECC_SHIFT;
++	writel(val, nb->res.nfi_regs + NFI_PAGEFMT);
++
++	if (nb->custom_sector_en) {
++		val = nfi->sector_spare_size + nfi->sector_size;
++		val |= SECCUS_SIZE_EN;
++		writel(val, nb->res.nfi_regs + NFI_SECCUS_SIZE);
++	}
++
++	return 0;
++}
++
++static int adjust_spare(struct nfi_base *nb, int *spare)
++{
++	int multi = nb->nfi.sector_size == 512 ? 1 : 2;
++	int i, count = nb->caps->spare_size_num;
++
++	if (*spare >= nb->caps->spare_size[count - 1] * multi) {
++		*spare = nb->caps->spare_size[count - 1] * multi;
++		return count - 1;
++	}
++
++	if (*spare < nb->caps->spare_size[0] * multi)
++		return -EINVAL;
++
++	for (i = 1; i < count; i++) {
++		if (*spare < nb->caps->spare_size[i] * multi) {
++			*spare = nb->caps->spare_size[i - 1] * multi;
++			return i - 1;
++		}
++	}
++
++	return -EINVAL;
++}
++
++static int nfi_set_format(struct nfi *nfi, struct nfi_format *format)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfiecc *ecc = nb->ecc;
++	int ecc_strength = format->ecc_req;
++	int min_fdm, min_ecc, max_ecc;
++	u32 temp, page_sectors;
++	int spare_idx = 0;
++
++	if (!nb->buf) {
++#if NANDX_BULK_IO_USE_DRAM
++		nb->buf = NANDX_NFI_BUF_ADDR;
++#else
++		nb->buf = mem_alloc(1, format->page_size + format->spare_size);
++#endif
++		if (!nb->buf)
++			return -ENOMEM;
++	}
++
++	nb->format = *format;
++
++	/* ToBeFixed: for spi nand, now sector size is 512,
++	 * it should be same with slc.
++	 */
++	nfi->sector_size = 512;
++	/* format->ecc_req is the requirement per 1KB */
++	ecc_strength >>= 1;
++
++	page_sectors = div_down(format->page_size, nfi->sector_size);
++	nfi->sector_spare_size = div_down(format->spare_size, page_sectors);
++
++	if (!nb->custom_sector_en) {
++		spare_idx = adjust_spare(nb, &nfi->sector_spare_size);
++		if (spare_idx < 0)
++			return -EINVAL;
++	}
++
++	/* calculate ecc strength and fdm size */
++	temp = (nfi->sector_spare_size - nb->caps->max_fdm_size) * 8;
++	min_ecc = div_down(temp, nb->caps->ecc_parity_bits);
++	min_ecc = ecc->adjust_strength(ecc, min_ecc);
++	if (min_ecc < 0)
++		return -EINVAL;
++
++	temp = div_up(nb->res.min_oob_req, page_sectors);
++	temp = (nfi->sector_spare_size - temp) * 8;
++	max_ecc = div_down(temp, nb->caps->ecc_parity_bits);
++	max_ecc = ecc->adjust_strength(ecc, max_ecc);
++	if (max_ecc < 0)
++		return -EINVAL;
++
++	temp = div_up(temp * nb->caps->ecc_parity_bits, 8);
++	temp = nfi->sector_spare_size - temp;
++	min_fdm = min_t(u32, temp, (u32)nb->caps->max_fdm_size);
++
++	if (ecc_strength > max_ecc) {
++		pr_info("required ecc strength %d, max supported %d\n",
++			ecc_strength, max_ecc);
++		nfi->ecc_strength = max_ecc;
++		nfi->fdm_size = min_fdm;
++	} else if (format->ecc_req < min_ecc) {
++		nfi->ecc_strength = min_ecc;
++		nfi->fdm_size = nb->caps->max_fdm_size;
++	} else {
++		ecc_strength = ecc->adjust_strength(ecc, ecc_strength);
++		if (ecc_strength < 0)
++			return -EINVAL;
++
++		nfi->ecc_strength = ecc_strength;
++		temp = div_up(ecc_strength * nb->caps->ecc_parity_bits, 8);
++		nfi->fdm_size = nfi->sector_spare_size - temp;
++	}
++
++	nb->page_sectors = div_down(format->page_size, nfi->sector_size);
++
++	/* some IC has fixed fdm_ecc_size, if not assigend, set to fdm_size */
++	nfi->fdm_ecc_size = nb->caps->fdm_ecc_size ? : nfi->fdm_size;
++
++	nfi->ecc_parity_size = div_up(nfi->ecc_strength *
++				      nb->caps->ecc_parity_bits,
++				      8);
++	set_bad_mark_ctrl(nb);
++
++	pr_debug("sector_size: %d\n", nfi->sector_size);
++	pr_debug("sector_spare_size: %d\n", nfi->sector_spare_size);
++	pr_debug("fdm_size: %d\n", nfi->fdm_size);
++	pr_debug("fdm_ecc_size: %d\n", nfi->fdm_ecc_size);
++	pr_debug("ecc_strength: %d\n", nfi->ecc_strength);
++	pr_debug("ecc_parity_size: %d\n", nfi->ecc_parity_size);
++
++	return setup_format(nb, spare_idx);
++}
++
++static int nfi_ctrl(struct nfi *nfi, int cmd, void *args)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	int ret = 0;
++
++	switch (cmd) {
++	case NFI_CTRL_DMA:
++		nb->dma_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_AUTOFORMAT:
++		nb->auto_format = *(bool *)args;
++		break;
++
++	case NFI_CTRL_NFI_IRQ:
++		nb->nfi_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_PAGE_IRQ:
++		nb->page_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_BAD_MARK_SWAP:
++		nb->bad_mark_swap_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC:
++		nb->ecc_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC_MODE:
++		nb->ecc_mode = *(enum nfiecc_mode *)args;
++		break;
++
++	case NFI_CTRL_ECC_CLOCK:
++		/* NOTE: it seems that there's nothing need to do
++		 * if new IC need, just add tht logic
++		 */
++		nb->ecc_clk_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC_IRQ:
++		nb->ecc_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC_DECODE_MODE:
++		nb->ecc_deccon = *(enum nfiecc_deccon *)args;
++		break;
++
++	default:
++		pr_info("invalid arguments.\n");
++		ret = -EOPNOTSUPP;
++		break;
++	}
++
++	pr_debug("%s: set cmd(%d) to %d\n", __func__, cmd, *(int *)args);
++	return ret;
++}
++
++static int nfi_send_cmd(struct nfi *nfi, short cmd)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	void *regs = nb->res.nfi_regs;
++	int ret;
++	u32 val;
++
++	pr_debug("%s: cmd 0x%x\n", __func__, cmd);
++
++	if (cmd < 0)
++		return -EINVAL;
++
++	set_op_mode(regs, nb->op_mode);
++
++	writel(cmd, regs + NFI_CMD);
++
++	ret = readl_poll_timeout_atomic(regs + NFI_STA,
++					val, !(val & STA_CMD),
++					5, NFI_TIMEOUT);
++	if (ret)
++		pr_info("send cmd 0x%x timeout\n", cmd);
++
++	return ret;
++}
++
++static int nfi_send_addr(struct nfi *nfi, int col, int row,
++			 int col_cycle, int row_cycle)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	void *regs = nb->res.nfi_regs;
++	int ret;
++	u32 val;
++
++	pr_debug("%s: col 0x%x, row 0x%x, col_cycle 0x%x, row_cycle 0x%x\n",
++		 __func__, col, row, col_cycle, row_cycle);
++
++	nb->col = col;
++	nb->row = row;
++
++	writel(col, regs + NFI_COLADDR);
++	writel(row, regs + NFI_ROWADDR);
++	writel(col_cycle | (row_cycle << ROW_SHIFT), regs + NFI_ADDRNOB);
++
++	ret = readl_poll_timeout_atomic(regs + NFI_STA,
++					val, !(val & STA_ADDR),
++					5, NFI_TIMEOUT);
++	if (ret)
++		pr_info("send address timeout\n");
++
++	return ret;
++}
++
++static int nfi_trigger(struct nfi *nfi)
++{
++	/* Nothing need to do. */
++	return 0;
++}
++
++static inline int wait_io_ready(void *regs)
++{
++	u32 val;
++	int ret;
++
++	ret = readl_poll_timeout_atomic(regs + NFI_PIO_DIRDY,
++					val, val & PIO_DI_RDY,
++					2, NFI_TIMEOUT);
++	if (ret)
++		pr_info("wait io ready timeout\n");
++
++	return ret;
++}
++
++static int wait_ready_irq(struct nfi_base *nb, u32 timeout)
++{
++	void *regs = nb->res.nfi_regs;
++	int ret;
++	u32 val;
++
++	writel(0xf1, regs + NFI_CNRNB);
++	nandx_event_init(nb->done);
++
++	writel(INTR_BUSY_RETURN_EN, (void *)(regs + NFI_INTR_EN));
++
++	/**
++	 * check if nand already bean ready,
++	 * avoid issue that casued by missing irq-event.
++	 */
++	val = readl(regs + NFI_STA);
++	if (val & STA_BUSY2READY) {
++		readl(regs + NFI_INTR_STA);
++		writel(0, (void *)(regs + NFI_INTR_EN));
++		return 0;
++	}
++
++	ret = nandx_event_wait_complete(nb->done, timeout);
++
++	writew(0, regs + NFI_CNRNB);
++	return ret;
++}
++
++static void wait_ready_twhr2(struct nfi_base *nb, u32 timeout)
++{
++	/* NOTE: this for tlc */
++}
++
++static int wait_ready_poll(struct nfi_base *nb, u32 timeout)
++{
++	void *regs = nb->res.nfi_regs;
++	int ret;
++	u32 val;
++
++	writel(0x21, regs + NFI_CNRNB);
++	ret = readl_poll_timeout_atomic(regs + NFI_STA, val,
++					val & STA_BUSY2READY,
++					2, timeout);
++	writew(0, regs + NFI_CNRNB);
++
++	return ret;
++}
++
++static int nfi_wait_ready(struct nfi *nfi, int type, u32 timeout)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	int ret;
++
++	switch (type) {
++	case NAND_WAIT_IRQ:
++		if (nb->nfi_irq_en)
++			ret = wait_ready_irq(nb, timeout);
++		else
++			ret = -EINVAL;
++
++		break;
++
++	case NAND_WAIT_POLLING:
++		ret = wait_ready_poll(nb, timeout);
++		break;
++
++	case NAND_WAIT_TWHR2:
++		wait_ready_twhr2(nb, timeout);
++		ret = 0;
++		break;
++
++	default:
++		ret = -EINVAL;
++		break;
++	}
++
++	if (ret)
++		pr_info("%s: type 0x%x, timeout 0x%x\n",
++		       __func__, type, timeout);
++
++	return ret;
++}
++
++static int enable_ecc_decode(struct nfi_base *nb, int sectors)
++{
++	struct nfi *nfi = &nb->nfi;
++	struct nfiecc *ecc = nb->ecc;
++
++	ecc->config.op = ECC_DECODE;
++	ecc->config.mode = nb->ecc_mode;
++	ecc->config.deccon = nb->ecc_deccon;
++	ecc->config.sectors = sectors;
++	ecc->config.len = nfi->sector_size + nfi->fdm_ecc_size;
++	ecc->config.strength = nfi->ecc_strength;
++
++	return ecc->enable(ecc);
++}
++
++static int enable_ecc_encode(struct nfi_base *nb)
++{
++	struct nfiecc *ecc = nb->ecc;
++	struct nfi *nfi = &nb->nfi;
++
++	ecc->config.op = ECC_ENCODE;
++	ecc->config.mode = nb->ecc_mode;
++	ecc->config.len = nfi->sector_size + nfi->fdm_ecc_size;
++	ecc->config.strength = nfi->ecc_strength;
++
++	return ecc->enable(ecc);
++}
++
++static void read_fdm(struct nfi_base *nb, u8 *fdm, int start_sector,
++		     int sectors)
++{
++	void *regs = nb->res.nfi_regs;
++	int j, i = start_sector;
++	u32 vall, valm;
++	u8 *buf = fdm;
++
++	for (; i < start_sector + sectors; i++) {
++		if (nb->bad_mark_swap_en)
++			buf = nb->bad_mark_ctrl.fdm_shift(&nb->nfi, fdm, i);
++
++		vall = readl(regs + NFI_FDML(i));
++		valm = readl(regs + NFI_FDMM(i));
++
++		for (j = 0; j < nb->nfi.fdm_size; j++)
++			*buf++ = (j >= 4 ? valm : vall) >> ((j & 3) << 3);
++	}
++}
++
++static void write_fdm(struct nfi_base *nb, u8 *fdm)
++{
++	struct nfi *nfi = &nb->nfi;
++	void *regs = nb->res.nfi_regs;
++	u32 vall, valm;
++	int i, j;
++	u8 *buf = fdm;
++
++	for (i = 0; i < nb->page_sectors; i++) {
++		if (nb->bad_mark_swap_en)
++			buf = nb->bad_mark_ctrl.fdm_shift(nfi, fdm, i);
++
++		vall = 0;
++		for (j = 0; j < 4; j++)
++			vall |= (j < nfi->fdm_size ? *buf++ : 0xff) << (j * 8);
++		writel(vall, regs + NFI_FDML(i));
++
++		valm = 0;
++		for (j = 0; j < 4; j++)
++			valm |= (j < nfi->fdm_size ? *buf++ : 0xff) << (j * 8);
++		writel(valm, regs + NFI_FDMM(i));
++	}
++}
++
++/* NOTE: pio not use auto format */
++static int pio_rx_data(struct nfi_base *nb, u8 *data, u8 *fdm,
++		       int sectors)
++{
++	struct nfiecc_status ecc_status;
++	struct nfi *nfi = &nb->nfi;
++	void *regs = nb->res.nfi_regs;
++	u32 val, bitflips = 0;
++	int len, ret, i;
++	u8 *buf;
++
++	val = readl(regs + NFI_CNFG) | CNFG_BYTE_RW;
++	writel(val, regs + NFI_CNFG);
++
++	len = nfi->sector_size + nfi->sector_spare_size;
++	len *= sectors;
++
++	for (i = 0; i < len; i++) {
++		ret = wait_io_ready(regs);
++		if (ret)
++			return ret;
++
++		nb->buf[i] = readb(regs + NFI_DATAR);
++	}
++
++	/* TODO: do error handle for autoformat setting of pio */
++	if (nb->ecc_en) {
++		for (i = 0; i < sectors; i++) {
++			buf = nb->buf + i * (nfi->sector_size +
++					     nfi->sector_spare_size);
++			ret = nb->ecc->correct_data(nb->ecc, &ecc_status,
++						    buf, i);
++			if (data)
++				memcpy(data + i * nfi->sector_size,
++				       buf, nfi->sector_size);
++			if (fdm)
++				memcpy(fdm + i * nfi->fdm_size,
++				       buf + nfi->sector_size, nfi->fdm_size);
++			if (ret) {
++				ret = nb->ecc->decode_status(nb->ecc, i, 1);
++				if (ret < 0)
++					return ret;
++
++				bitflips = max_t(int, (int)bitflips, ret);
++			}
++		}
++
++		return bitflips;
++	}
++
++	/* raw read, only data not null, and its length should be $len */
++	if (data)
++		memcpy(data, nb->buf, len);
++
++	return 0;
++}
++
++static int pio_tx_data(struct nfi_base *nb, u8 *data, u8 *fdm,
++		       int sectors)
++{
++	struct nfi *nfi = &nb->nfi;
++	void *regs = nb->res.nfi_regs;
++	u32 i, val;
++	int len, ret;
++
++	val = readw(regs + NFI_CNFG) | CNFG_BYTE_RW;
++	writew(val, regs + NFI_CNFG);
++
++	len = nb->ecc_en ? nfi->sector_size :
++	      nfi->sector_size + nfi->sector_spare_size;
++	len *= sectors;
++
++	/* data shouldn't null,
++	 * and if ecc enable ,fdm been written in prepare process
++	 */
++	for (i = 0; i < len; i++) {
++		ret = wait_io_ready(regs);
++		if (ret)
++			return ret;
++		writeb(data[i], regs + NFI_DATAW);
++	}
++
++	return 0;
++}
++
++static bool is_page_empty(struct nfi_base *nb, u8 *data, u8 *fdm,
++			  int sectors)
++{
++	u32 empty = readl(nb->res.nfi_regs + NFI_STA) & STA_EMP_PAGE;
++
++	if (empty) {
++		pr_info("empty page!\n");
++		return true;
++	}
++
++	return false;
++}
++
++static int rw_prepare(struct nfi_base *nb, int sectors, u8 *data,
++		      u8 *fdm, bool read)
++{
++	void *regs = nb->res.nfi_regs;
++	u32 len = nb->nfi.sector_size * sectors;
++	bool irq_en = nb->dma_en && nb->nfi_irq_en;
++	void *dma_addr;
++	u32 val;
++	int ret;
++
++	nb->rw_sectors = sectors;
++
++	if (irq_en) {
++		nandx_event_init(nb->done);
++		writel(INTR_AHB_DONE_EN, regs + NFI_INTR_EN);
++	}
++
++	val = readw(regs + NFI_CNFG);
++	if (read)
++		val |= CNFG_READ_EN;
++	else
++		val &= ~CNFG_READ_EN;
++
++	/* as design, now, auto format enabled when ecc enabled */
++	if (nb->ecc_en) {
++		val |= CNFG_HW_ECC_EN | CNFG_AUTO_FMT_EN;
++
++		if (read)
++			ret = enable_ecc_decode(nb, sectors);
++		else
++			ret = enable_ecc_encode(nb);
++
++		if (ret) {
++			pr_info("%s: ecc enable %s fail!\n", __func__,
++			       read ? "decode" : "encode");
++			return ret;
++		}
++	} else {
++		val &= ~(CNFG_HW_ECC_EN | CNFG_AUTO_FMT_EN);
++	}
++
++	if (!read && nb->bad_mark_swap_en)
++		nb->bad_mark_ctrl.bad_mark_swap(&nb->nfi, data, fdm);
++
++	if (!nb->ecc_en && read)
++		len += sectors * nb->nfi.sector_spare_size;
++
++	if (nb->dma_en) {
++		val |= CNFG_DMA_BURST_EN | CNFG_AHB;
++
++		if (read) {
++			dma_addr = (void *)(unsigned long)nandx_dma_map(
++						nb->res.dev, nb->buf,
++						(u64)len, NDMA_FROM_DEV);
++		} else {
++			memcpy(nb->buf, data, len);
++			dma_addr = (void *)(unsigned long)nandx_dma_map(
++						nb->res.dev, nb->buf,
++						(u64)len, NDMA_TO_DEV);
++		}
++
++		writel((unsigned long)dma_addr, (void *)regs + NFI_STRADDR);
++
++		nb->access_len = len;
++		nb->dma_addr = dma_addr;
++	}
++
++	if (nb->ecc_en && !read && fdm)
++		write_fdm(nb, fdm);
++
++	writew(val, regs + NFI_CNFG);
++	/* setup R/W sector number */
++	writel(sectors << CON_SEC_SHIFT, regs + NFI_CON);
++
++	return 0;
++}
++
++static void rw_trigger(struct nfi_base *nb, bool read)
++{
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	val = read ? CON_BRD : CON_BWR;
++	val |= readl(regs + NFI_CON);
++	writel(val, regs + NFI_CON);
++
++	writel(STAR_EN, regs + NFI_STRDATA);
++}
++
++static int rw_wait_done(struct nfi_base *nb, int sectors, bool read)
++{
++	void *regs = nb->res.nfi_regs;
++	bool irq_en = nb->dma_en && nb->nfi_irq_en;
++	int ret;
++	u32 val;
++
++	if (irq_en) {
++		ret = nandx_event_wait_complete(nb->done, NFI_TIMEOUT);
++		if (!ret) {
++			writew(0, regs + NFI_INTR_EN);
++			return ret;
++		}
++	}
++
++	if (read) {
++		ret = readl_poll_timeout_atomic(regs + NFI_BYTELEN, val,
++						ADDRCNTR_SEC(val) >=
++						(u32)sectors,
++						2, NFI_TIMEOUT);
++		/* HW issue: if not wait ahb done, need polling bus busy */
++		if (!ret && !irq_en)
++			ret = readl_poll_timeout_atomic(regs + NFI_MASTER_STA,
++							val,
++							!(val &
++							  MASTER_BUS_BUSY),
++							2, NFI_TIMEOUT);
++	} else {
++		ret = readl_poll_timeout_atomic(regs + NFI_ADDRCNTR, val,
++						ADDRCNTR_SEC(val) >=
++						(u32)sectors,
++						2, NFI_TIMEOUT);
++	}
++
++	if (ret) {
++		pr_info("do page %s timeout\n", read ? "read" : "write");
++		return ret;
++	}
++
++	if (read && nb->ecc_en) {
++		ret = nb->ecc->wait_done(nb->ecc);
++		if (ret)
++			return ret;
++
++		return nb->ecc->decode_status(nb->ecc, 0, sectors);
++	}
++
++	return 0;
++}
++
++static int rw_data(struct nfi_base *nb, u8 *data, u8 *fdm, int sectors,
++		   bool read)
++{
++	if (read && nb->dma_en && nb->ecc_en && fdm)
++		read_fdm(nb, fdm, 0, sectors);
++
++	if (!nb->dma_en) {
++		if (read)
++			return pio_rx_data(nb, data, fdm, sectors);
++
++		return pio_tx_data(nb, data, fdm, sectors);
++	}
++
++	return 0;
++}
++
++static void rw_complete(struct nfi_base *nb, u8 *data, u8 *fdm,
++			bool read)
++{
++	int data_len = 0;
++	bool is_empty;
++
++	if (nb->dma_en) {
++		if (read) {
++			nandx_dma_unmap(nb->res.dev, nb->buf, nb->dma_addr,
++					(u64)nb->access_len, NDMA_FROM_DEV);
++
++			if (data) {
++				data_len = nb->rw_sectors * nb->nfi.sector_size;
++				memcpy(data, nb->buf, data_len);
++			}
++
++			if (fdm)
++				memcpy(fdm, nb->buf + data_len,
++				       nb->access_len - data_len);
++
++			if (nb->read_status == -ENANDREAD) {
++				is_empty = nb->is_page_empty(nb, data, fdm,
++							nb->rw_sectors);
++				if (is_empty)
++					nb->read_status = 0;
++			}
++		} else {
++			nandx_dma_unmap(nb->res.dev, nb->buf, nb->dma_addr,
++					(u64)nb->access_len, NDMA_TO_DEV);
++		}
++	}
++
++	/* whether it's reading or writing, we all check if nee swap
++	 * for write, we need to restore data
++	 */
++	if (nb->bad_mark_swap_en)
++		nb->bad_mark_ctrl.bad_mark_swap(&nb->nfi, data, fdm);
++
++	if (nb->ecc_en)
++		nb->ecc->disable(nb->ecc);
++
++	writel(0, nb->res.nfi_regs + NFI_CNFG);
++	writel(0, nb->res.nfi_regs + NFI_CON);
++}
++
++static int nfi_read_sectors(struct nfi *nfi, u8 *data, u8 *fdm,
++			    int sectors)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	int bitflips = 0, ret;
++
++	pr_debug("%s: read page#%d\n", __func__, nb->row);
++	pr_debug("%s: data address 0x%x, fdm address 0x%x, sectors 0x%x\n",
++		 __func__, (u32)((unsigned long)data),
++		 (u32)((unsigned long)fdm), sectors);
++
++	nb->read_status = 0;
++
++	ret = nb->rw_prepare(nb, sectors, data, fdm, true);
++	if (ret)
++		return ret;
++
++	nb->rw_trigger(nb, true);
++
++	if (nb->dma_en) {
++		ret = nb->rw_wait_done(nb, sectors, true);
++		if (ret > 0)
++			bitflips = ret;
++		else if (ret == -ENANDREAD)
++			nb->read_status = -ENANDREAD;
++		else if (ret < 0)
++			goto complete;
++
++	}
++
++	ret = nb->rw_data(nb, data, fdm, sectors, true);
++	if (ret > 0)
++		ret = max_t(int, ret, bitflips);
++
++complete:
++	nb->rw_complete(nb, data, fdm, true);
++
++	if (nb->read_status == -ENANDREAD)
++		return -ENANDREAD;
++
++	return ret;
++}
++
++int nfi_write_page(struct nfi *nfi, u8 *data, u8 *fdm)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	u32 sectors = div_down(nb->format.page_size, nfi->sector_size);
++	int ret;
++
++	pr_debug("%s: data address 0x%x, fdm address 0x%x\n",
++		 __func__, (int)((unsigned long)data),
++		 (int)((unsigned long)fdm));
++
++	ret = nb->rw_prepare(nb, sectors, data, fdm, false);
++	if (ret)
++		return ret;
++
++	nb->rw_trigger(nb, false);
++
++	ret = nb->rw_data(nb, data, fdm, sectors, false);
++	if (ret)
++		return ret;
++
++	ret = nb->rw_wait_done(nb, sectors, false);
++
++	nb->rw_complete(nb, data, fdm, false);
++
++	return ret;
++}
++
++static int nfi_rw_bytes(struct nfi *nfi, u8 *data, int count, bool read)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	void *regs = nb->res.nfi_regs;
++	int i, ret;
++	u32 val;
++
++	for (i = 0; i < count; i++) {
++		val = readl(regs + NFI_STA) & NFI_FSM_MASK;
++		if (val != NFI_FSM_CUSTDATA) {
++			val = readw(regs + NFI_CNFG) | CNFG_BYTE_RW;
++			if (read)
++				val |= CNFG_READ_EN;
++			writew(val, regs + NFI_CNFG);
++
++			val = div_up(count, nfi->sector_size);
++			val = (val << CON_SEC_SHIFT) | CON_BRD | CON_BWR;
++			writel(val, regs + NFI_CON);
++
++			writew(STAR_EN, regs + NFI_STRDATA);
++		}
++
++		ret = wait_io_ready(regs);
++		if (ret)
++			return ret;
++
++		if (read)
++			data[i] = readb(regs + NFI_DATAR);
++		else
++			writeb(data[i], regs + NFI_DATAW);
++	}
++
++	writel(0, nb->res.nfi_regs + NFI_CNFG);
++
++	return 0;
++}
++
++static int nfi_read_bytes(struct nfi *nfi, u8 *data, int count)
++{
++	return nfi_rw_bytes(nfi, data, count, true);
++}
++
++static int nfi_write_bytes(struct nfi *nfi, u8 *data, int count)
++{
++	return nfi_rw_bytes(nfi, data, count, false);
++}
++
++/* As register map says, only when flash macro is idle,
++ * sw reset or nand interface change can be issued
++ */
++static inline int wait_flash_macro_idle(void *regs)
++{
++	u32 val;
++
++	return readl_poll_timeout_atomic(regs + NFI_STA, val,
++					 val & FLASH_MACRO_IDLE, 2,
++					 NFI_TIMEOUT);
++}
++
++#define ACCTIMING(tpoecs, tprecs, tc2r, tw2r, twh, twst, trlt) \
++	((tpoecs) << 28 | (tprecs) << 22 | (tc2r) << 16 | \
++	 (tw2r) << 12 | (twh) << 8 | (twst) << 4 | (trlt))
++
++static int nfi_set_sdr_timing(struct nfi *nfi, void *timing, u8 type)
++{
++	struct nand_sdr_timing *sdr = (struct nand_sdr_timing *) timing;
++	struct nfi_base *nb = nfi_to_base(nfi);
++	void *regs = nb->res.nfi_regs;
++	u32 tpoecs, tprecs, tc2r, tw2r, twh, twst, trlt, tstrobe;
++	u32 rate, val;
++	int ret;
++
++	ret = wait_flash_macro_idle(regs);
++	if (ret)
++		return ret;
++
++	/* turn clock rate into KHZ */
++	rate = nb->res.clock_1x / 1000;
++
++	tpoecs = max_t(u16, sdr->tALH, sdr->tCLH);
++	tpoecs = div_up(tpoecs * rate, 1000000);
++	tpoecs &= 0xf;
++
++	tprecs = max_t(u16, sdr->tCLS, sdr->tALS);
++	tprecs = div_up(tprecs * rate, 1000000);
++	tprecs &= 0x3f;
++
++	/* tc2r is in unit of 2T */
++	tc2r = div_up(sdr->tCR * rate, 1000000);
++	tc2r = div_down(tc2r, 2);
++	tc2r &= 0x3f;
++
++	tw2r = div_up(sdr->tWHR * rate, 1000000);
++	tw2r = div_down(tw2r, 2);
++	tw2r &= 0xf;
++
++	twh = max_t(u16, sdr->tREH, sdr->tWH);
++	twh = div_up(twh * rate, 1000000) - 1;
++	twh &= 0xf;
++
++	twst = div_up(sdr->tWP * rate, 1000000) - 1;
++	twst &= 0xf;
++
++	trlt = div_up(sdr->tRP * rate, 1000000) - 1;
++	trlt &= 0xf;
++
++	/* If tREA is bigger than tRP, setup strobe sel here */
++	if ((trlt + 1) * 1000000 / rate < sdr->tREA) {
++		tstrobe = sdr->tREA - (trlt + 1) * 1000000 / rate;
++		tstrobe = div_up(tstrobe * rate, 1000000);
++		val = readl(regs + NFI_DEBUG_CON1);
++		val &= ~STROBE_MASK;
++		val |= tstrobe << STROBE_SHIFT;
++		writel(val, regs + NFI_DEBUG_CON1);
++	}
++
++	/*
++	 * ACCON: access timing control register
++	 * -------------------------------------
++	 * 31:28: tpoecs, minimum required time for CS post pulling down after
++	 *        accessing the device
++	 * 27:22: tprecs, minimum required time for CS pre pulling down before
++	 *        accessing the device
++	 * 21:16: tc2r, minimum required time from NCEB low to NREB low
++	 * 15:12: tw2r, minimum required time from NWEB high to NREB low.
++	 * 11:08: twh, write enable hold time
++	 * 07:04: twst, write wait states
++	 * 03:00: trlt, read wait states
++	 */
++	val = ACCTIMING(tpoecs, tprecs, tc2r, tw2r, twh, twst, trlt);
++	pr_info("acctiming: 0x%x\n", val);
++	writel(val, regs + NFI_ACCCON);
++
++	/* set NAND type */
++	writel(NAND_TYPE_ASYNC, regs + NFI_NAND_TYPE_CNFG);
++
++	return ret;
++}
++
++static int nfi_set_timing(struct nfi *nfi, void *timing, int type)
++{
++	switch (type) {
++	case NAND_TIMING_SDR:
++		return nfi_set_sdr_timing(nfi, timing, type);
++
++	/* NOTE: for mlc/tlc */
++	case NAND_TIMING_SYNC_DDR:
++	case NAND_TIMING_TOGGLE_DDR:
++	case NAND_TIMING_NVDDR2:
++	default:
++		return -EINVAL;
++	}
++
++	return 0;
++}
++
++static void set_nfi_funcs(struct nfi *nfi)
++{
++	nfi->select_chip = nfi_select_chip;
++	nfi->set_format = nfi_set_format;
++	nfi->nfi_ctrl = nfi_ctrl;
++	nfi->set_timing = nfi_set_timing;
++
++	nfi->reset = nfi_reset;
++	nfi->send_cmd = nfi_send_cmd;
++	nfi->send_addr = nfi_send_addr;
++	nfi->trigger = nfi_trigger;
++
++	nfi->write_page = nfi_write_page;
++	nfi->write_bytes = nfi_write_bytes;
++	nfi->read_sectors = nfi_read_sectors;
++	nfi->read_bytes = nfi_read_bytes;
++
++	nfi->wait_ready = nfi_wait_ready;
++
++	nfi->enable_randomizer = nfi_enable_randomizer;
++	nfi->disable_randomizer = nfi_disable_randomizer;
++}
++
++static struct nfi_caps nfi_caps_mt7622 = {
++	.max_fdm_size = 8,
++	.fdm_ecc_size = 1,
++	.ecc_parity_bits = 13,
++	.spare_size = spare_size_mt7622,
++	.spare_size_num = 4,
++};
++
++static struct nfi_caps *nfi_get_match_data(enum mtk_ic_version ic)
++{
++	/* NOTE: add other IC's data */
++	return &nfi_caps_mt7622;
++}
++
++static void set_nfi_base_params(struct nfi_base *nb)
++{
++	nb->ecc_en = false;
++	nb->dma_en = false;
++	nb->nfi_irq_en = false;
++	nb->ecc_irq_en = false;
++	nb->page_irq_en = false;
++	nb->ecc_clk_en = false;
++	nb->randomize_en = false;
++	nb->custom_sector_en = false;
++	nb->bad_mark_swap_en = false;
++
++	nb->op_mode = CNFG_CUSTOM_MODE;
++	nb->ecc_deccon = ECC_DEC_CORRECT;
++	nb->ecc_mode = ECC_NFI_MODE;
++
++	nb->done = nandx_event_create();
++	nb->caps = nfi_get_match_data(nb->res.ic_ver);
++
++	nb->set_op_mode = set_op_mode;
++	nb->is_page_empty = is_page_empty;
++
++	nb->rw_prepare = rw_prepare;
++	nb->rw_trigger = rw_trigger;
++	nb->rw_wait_done = rw_wait_done;
++	nb->rw_data = rw_data;
++	nb->rw_complete = rw_complete;
++}
++
++struct nfi *__weak nfi_extend_init(struct nfi_base *nb)
++{
++	return &nb->nfi;
++}
++
++void __weak nfi_extend_exit(struct nfi_base *nb)
++{
++	mem_free(nb);
++}
++
++struct nfi *nfi_init(struct nfi_resource *res)
++{
++	struct nfiecc_resource ecc_res;
++	struct nfi_base *nb;
++	struct nfiecc *ecc;
++	struct nfi *nfi;
++	int ret;
++
++	nb = mem_alloc(1, sizeof(struct nfi_base));
++	if (!nb) {
++		pr_info("nfi alloc memory fail @%s.\n", __func__);
++		return NULL;
++	}
++
++	nb->res = *res;
++
++	ret = nandx_irq_register(res->dev, res->nfi_irq_id, nfi_irq_handler,
++				 "mtk_nand", nb);
++	if (ret) {
++		pr_info("nfi irq register failed!\n");
++		goto error;
++	}
++
++	/* fill ecc paras and init ecc */
++	ecc_res.ic_ver = nb->res.ic_ver;
++	ecc_res.dev = nb->res.dev;
++	ecc_res.irq_id = nb->res.ecc_irq_id;
++	ecc_res.regs = nb->res.ecc_regs;
++	ecc = nfiecc_init(&ecc_res);
++	if (!ecc) {
++		pr_info("nfiecc init fail.\n");
++		return NULL;
++	}
++
++	nb->ecc = ecc;
++
++	set_nfi_base_params(nb);
++	set_nfi_funcs(&nb->nfi);
++
++	/* Assign a temp sector size for reading ID & para page.
++	 * We may assign new value later.
++	 */
++	nb->nfi.sector_size = 512;
++
++	/* give a default timing, and as discuss
++	 * this is the only thing what we need do for nfi init
++	 * if need do more, then we can add a function
++	 */
++	writel(0x30C77FFF, nb->res.nfi_regs + NFI_ACCCON);
++
++	nfi = nfi_extend_init(nb);
++	if (nfi)
++		return nfi;
++
++error:
++	mem_free(nb);
++	return NULL;
++}
++
++void nfi_exit(struct nfi *nfi)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++
++	nandx_event_destroy(nb->done);
++	nfiecc_exit(nb->ecc);
++#if !NANDX_BULK_IO_USE_DRAM
++	mem_free(nb->buf);
++#endif
++	nfi_extend_exit(nb);
++}
++
+diff --git a/drivers/mtd/nandx/core/nfi/nfi_base.h b/drivers/mtd/nandx/core/nfi/nfi_base.h
+new file mode 100644
+index 0000000000..ae894eaa31
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfi_base.h
+@@ -0,0 +1,95 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFI_BASE_H__
++#define __NFI_BASE_H__
++
++#define NFI_TIMEOUT             1000000
++
++enum randomizer_op {
++	RAND_ENCODE,
++	RAND_DECODE
++};
++
++struct bad_mark_ctrl {
++	void (*bad_mark_swap)(struct nfi *nfi, u8 *buf, u8 *fdm);
++	u8 *(*fdm_shift)(struct nfi *nfi, u8 *fdm, int sector);
++	u32 sector;
++	u32 position;
++};
++
++struct nfi_caps {
++	u8 max_fdm_size;
++	u8 fdm_ecc_size;
++	u8 ecc_parity_bits;
++	const int *spare_size;
++	u32 spare_size_num;
++};
++
++struct nfi_base {
++	struct nfi nfi;
++	struct nfi_resource res;
++	struct nfiecc *ecc;
++	struct nfi_format format;
++	struct nfi_caps *caps;
++	struct bad_mark_ctrl bad_mark_ctrl;
++
++	/* page_size + spare_size */
++	u8 *buf;
++
++	/* used for spi nand */
++	u8 cmd_mode;
++	u32 op_mode;
++
++	int page_sectors;
++
++	void *done;
++
++	/* for read/write */
++	int col;
++	int row;
++	int access_len;
++	int rw_sectors;
++	void *dma_addr;
++	int read_status;
++
++	bool dma_en;
++	bool nfi_irq_en;
++	bool page_irq_en;
++	bool auto_format;
++	bool ecc_en;
++	bool ecc_irq_en;
++	bool ecc_clk_en;
++	bool randomize_en;
++	bool custom_sector_en;
++	bool bad_mark_swap_en;
++
++	enum nfiecc_deccon ecc_deccon;
++	enum nfiecc_mode ecc_mode;
++
++	void (*set_op_mode)(void *regs, u32 mode);
++	bool (*is_page_empty)(struct nfi_base *nb, u8 *data, u8 *fdm,
++			      int sectors);
++
++	int (*rw_prepare)(struct nfi_base *nb, int sectors, u8 *data, u8 *fdm,
++			  bool read);
++	void (*rw_trigger)(struct nfi_base *nb, bool read);
++	int (*rw_wait_done)(struct nfi_base *nb, int sectors, bool read);
++	int (*rw_data)(struct nfi_base *nb, u8 *data, u8 *fdm, int sectors,
++		       bool read);
++	void (*rw_complete)(struct nfi_base *nb, u8 *data, u8 *fdm, bool read);
++};
++
++static inline struct nfi_base *nfi_to_base(struct nfi *nfi)
++{
++	return container_of(nfi, struct nfi_base, nfi);
++}
++
++struct nfi *nfi_extend_init(struct nfi_base *nb);
++void nfi_extend_exit(struct nfi_base *nb);
++
++#endif /* __NFI_BASE_H__ */
+diff --git a/drivers/mtd/nandx/core/nfi/nfi_regs.h b/drivers/mtd/nandx/core/nfi/nfi_regs.h
+new file mode 100644
+index 0000000000..ba4868acc8
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfi_regs.h
+@@ -0,0 +1,114 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFI_REGS_H__
++#define __NFI_REGS_H__
++
++#define NFI_CNFG                0x000
++#define         CNFG_AHB                BIT(0)
++#define         CNFG_READ_EN            BIT(1)
++#define         CNFG_DMA_BURST_EN       BIT(2)
++#define         CNFG_RESEED_SEC_EN      BIT(4)
++#define         CNFG_RAND_SEL           BIT(5)
++#define         CNFG_BYTE_RW            BIT(6)
++#define         CNFG_HW_ECC_EN          BIT(8)
++#define         CNFG_AUTO_FMT_EN        BIT(9)
++#define         CNFG_RAND_MASK          GENMASK(5, 4)
++#define         CNFG_OP_MODE_MASK       GENMASK(14, 12)
++#define         CNFG_IDLE_MOD           0
++#define         CNFG_READ_MODE          (1 << 12)
++#define         CNFG_SINGLE_READ_MODE   (2 << 12)
++#define         CNFG_PROGRAM_MODE       (3 << 12)
++#define         CNFG_ERASE_MODE         (4 << 12)
++#define         CNFG_RESET_MODE         (5 << 12)
++#define         CNFG_CUSTOM_MODE        (6 << 12)
++#define NFI_PAGEFMT             0x004
++#define         PAGEFMT_SPARE_SHIFT     4
++#define         PAGEFMT_FDM_ECC_SHIFT   12
++#define         PAGEFMT_FDM_SHIFT       8
++#define         PAGEFMT_SEC_SEL_512     BIT(2)
++#define         PAGEFMT_512_2K          0
++#define         PAGEFMT_2K_4K           1
++#define         PAGEFMT_4K_8K           2
++#define         PAGEFMT_8K_16K          3
++#define NFI_CON                 0x008
++#define         CON_FIFO_FLUSH          BIT(0)
++#define         CON_NFI_RST             BIT(1)
++#define         CON_BRD                 BIT(8)
++#define         CON_BWR                 BIT(9)
++#define         CON_SEC_SHIFT           12
++#define NFI_ACCCON              0x00c
++#define NFI_INTR_EN             0x010
++#define         INTR_BUSY_RETURN_EN     BIT(4)
++#define         INTR_AHB_DONE_EN        BIT(6)
++#define NFI_INTR_STA            0x014
++#define NFI_CMD                 0x020
++#define NFI_ADDRNOB             0x030
++#define         ROW_SHIFT               4
++#define NFI_COLADDR             0x034
++#define NFI_ROWADDR             0x038
++#define NFI_STRDATA             0x040
++#define         STAR_EN                 1
++#define         STAR_DE                 0
++#define NFI_CNRNB               0x044
++#define NFI_DATAW               0x050
++#define NFI_DATAR               0x054
++#define NFI_PIO_DIRDY           0x058
++#define         PIO_DI_RDY              1
++#define NFI_STA                 0x060
++#define         STA_CMD                 BIT(0)
++#define         STA_ADDR                BIT(1)
++#define         FLASH_MACRO_IDLE        BIT(5)
++#define         STA_BUSY                BIT(8)
++#define         STA_BUSY2READY          BIT(9)
++#define         STA_EMP_PAGE            BIT(12)
++#define         NFI_FSM_CUSTDATA        (0xe << 16)
++#define         NFI_FSM_MASK            GENMASK(19, 16)
++#define         NAND_FSM_MASK           GENMASK(29, 23)
++#define NFI_ADDRCNTR            0x070
++#define         CNTR_VALID_MASK         GENMASK(16, 0)
++#define         CNTR_MASK               GENMASK(15, 12)
++#define         ADDRCNTR_SEC_SHIFT      12
++#define         ADDRCNTR_SEC(val) \
++	(((val) & CNTR_MASK) >> ADDRCNTR_SEC_SHIFT)
++#define NFI_STRADDR             0x080
++#define NFI_BYTELEN             0x084
++#define NFI_CSEL                0x090
++#define NFI_FDML(x)             (0x0a0 + (x) * 8)
++#define NFI_FDMM(x)             (0x0a4 + (x) * 8)
++#define NFI_DEBUG_CON1          0x220
++#define         STROBE_MASK             GENMASK(4, 3)
++#define         STROBE_SHIFT            3
++#define         ECC_CLK_EN              BIT(11)
++#define         AUTOC_SRAM_MODE         BIT(12)
++#define         BYPASS_MASTER_EN        BIT(15)
++#define NFI_MASTER_STA          0x224
++#define         MASTER_BUS_BUSY         0x3
++#define NFI_SECCUS_SIZE         0x22c
++#define         SECCUS_SIZE_EN          BIT(17)
++#define NFI_RANDOM_CNFG         0x238
++#define         RAN_ENCODE_EN           BIT(0)
++#define         ENCODE_SEED_SHIFT       1
++#define         RAN_DECODE_EN           BIT(16)
++#define         DECODE_SEED_SHIFT       17
++#define         RAN_SEED_MASK           0x7fff
++#define NFI_EMPTY_THRESH        0x23c
++#define NFI_NAND_TYPE_CNFG      0x240
++#define         NAND_TYPE_ASYNC         0
++#define         NAND_TYPE_TOGGLE        1
++#define         NAND_TYPE_SYNC          2
++#define NFI_ACCCON1             0x244
++#define NFI_DELAY_CTRL          0x248
++#define NFI_TLC_RD_WHR2         0x300
++#define         TLC_RD_WHR2_EN          BIT(12)
++#define         TLC_RD_WHR2_MASK        GENMASK(11, 0)
++#define SNF_SNF_CNFG            0x55c
++#define         SPI_MODE_EN             1
++#define         SPI_MODE_DIS            0
++
++#endif /* __NFI_REGS_H__ */
++
+diff --git a/drivers/mtd/nandx/core/nfi/nfi_spi.c b/drivers/mtd/nandx/core/nfi/nfi_spi.c
+new file mode 100644
+index 0000000000..67cd0aaad9
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfi_spi.c
+@@ -0,0 +1,689 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "../nfi.h"
++#include "nfiecc.h"
++#include "nfi_regs.h"
++#include "nfi_base.h"
++#include "nfi_spi_regs.h"
++#include "nfi_spi.h"
++
++#define NFI_CMD_DUMMY_RD 0x00
++#define NFI_CMD_DUMMY_WR 0x80
++
++static struct nfi_spi_delay spi_delay[SPI_NAND_MAX_DELAY] = {
++	/*
++	 * tCLK_SAM_DLY, tCLK_OUT_DLY, tCS_DLY, tWR_EN_DLY,
++	 * tIO_IN_DLY[4], tIO_OUT_DLY[4], tREAD_LATCH_LATENCY
++	 */
++	{0, 0, 0, 0, {0, 0, 0, 0}, {0, 0, 0, 0}, 0},
++	{21, 0, 0, 0, {0, 0, 0, 0}, {0, 0, 0, 0}, 0},
++	{63, 0, 0, 0, {0, 0, 0, 0}, {0, 0, 0, 0}, 0},
++	{0, 0, 0, 0, {0, 0, 0, 0}, {0, 0, 0, 0}, 1},
++	{21, 0, 0, 0, {0, 0, 0, 0}, {0, 0, 0, 0}, 1},
++	{63, 0, 0, 0, {0, 0, 0, 0}, {0, 0, 0, 0}, 1}
++};
++
++static inline struct nfi_spi *base_to_snfi(struct nfi_base *nb)
++{
++	return container_of(nb, struct nfi_spi, base);
++}
++
++static void snfi_mac_enable(struct nfi_base *nb)
++{
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	val = readl(regs + SNF_MAC_CTL);
++	val &= ~MAC_XIO_SEL;
++	val |= SF_MAC_EN;
++
++	writel(val, regs + SNF_MAC_CTL);
++}
++
++static void snfi_mac_disable(struct nfi_base *nb)
++{
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	val = readl(regs + SNF_MAC_CTL);
++	val &= ~(SF_TRIG | SF_MAC_EN);
++	writel(val, regs + SNF_MAC_CTL);
++}
++
++static int snfi_mac_trigger(struct nfi_base *nb)
++{
++	void *regs = nb->res.nfi_regs;
++	int ret;
++	u32 val;
++
++	val = readl(regs + SNF_MAC_CTL);
++	val |= SF_TRIG;
++	writel(val, regs + SNF_MAC_CTL);
++
++	ret = readl_poll_timeout_atomic(regs + SNF_MAC_CTL, val,
++					val & WIP_READY, 10,
++					NFI_TIMEOUT);
++	if (ret) {
++		pr_info("polling wip ready for read timeout\n");
++		return ret;
++	}
++
++	return readl_poll_timeout_atomic(regs + SNF_MAC_CTL, val,
++					 !(val & WIP), 10,
++					 NFI_TIMEOUT);
++}
++
++static int snfi_mac_op(struct nfi_base *nb)
++{
++	int ret;
++
++	snfi_mac_enable(nb);
++	ret = snfi_mac_trigger(nb);
++	snfi_mac_disable(nb);
++
++	return ret;
++}
++
++static void snfi_write_mac(struct nfi_spi *nfi_spi, u8 *data, int count)
++{
++	struct nandx_split32 split = {0};
++	u32 reg_offset = round_down(nfi_spi->tx_count, 4);
++	void *regs = nfi_spi->base.res.nfi_regs;
++	u32 data_offset = 0, i, val;
++	u8 *p_val = (u8 *)(&val);
++
++	nandx_split(&split, nfi_spi->tx_count, count, val, 4);
++
++	if (split.head_len) {
++		val = readl(regs + SPI_GPRAM_ADDR + reg_offset);
++
++		for (i = 0; i < split.head_len; i++)
++			p_val[split.head + i] = data[i];
++
++		writel(val, regs + SPI_GPRAM_ADDR + reg_offset);
++	}
++
++	if (split.body_len) {
++		reg_offset = split.body;
++		data_offset = split.head_len;
++
++		for (i = 0; i < split.body_len; i++) {
++			p_val[i & 3] = data[data_offset + i];
++
++			if ((i & 3) == 3) {
++				writel(val, regs + SPI_GPRAM_ADDR + reg_offset);
++				reg_offset += 4;
++			}
++		}
++	}
++
++	if (split.tail_len) {
++		reg_offset = split.tail;
++		data_offset += split.body_len;
++
++		for (i = 0; i < split.tail_len; i++) {
++			p_val[i] = data[data_offset + i];
++
++			if (i == split.tail_len - 1)
++				writel(val, regs + SPI_GPRAM_ADDR + reg_offset);
++		}
++	}
++}
++
++static void snfi_read_mac(struct nfi_spi *nfi_spi, u8 *data, int count)
++{
++	void *regs = nfi_spi->base.res.nfi_regs;
++	u32 reg_offset = round_down(nfi_spi->tx_count, 4);
++	struct nandx_split32 split = {0};
++	u32 data_offset = 0, i, val;
++	u8 *p_val = (u8 *)&val;
++
++	nandx_split(&split, nfi_spi->tx_count, count, val, 4);
++
++	if (split.head_len) {
++		val = readl(regs + SPI_GPRAM_ADDR + reg_offset);
++
++		for (i = 0; i < split.head_len; i++)
++			data[data_offset + i] = p_val[split.head + i];
++	}
++
++	if (split.body_len) {
++		reg_offset = split.body;
++		data_offset = split.head_len;
++
++		for (i = 0; i < split.body_len; i++) {
++			if ((i & 3) == 0) {
++				val = readl(regs + SPI_GPRAM_ADDR + reg_offset);
++				reg_offset += 4;
++			}
++
++			data[data_offset + i] = p_val[i % 4];
++		}
++	}
++
++	if (split.tail_len) {
++		reg_offset = split.tail;
++		data_offset += split.body_len;
++		val = readl(regs + SPI_GPRAM_ADDR + reg_offset);
++
++		for (i = 0; i < split.tail_len; i++)
++			data[data_offset + i] = p_val[i];
++	}
++}
++
++static int snfi_send_command(struct nfi *nfi, short cmd)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++
++	if (cmd == -1)
++		return 0;
++
++	if (nfi_spi->snfi_mode == SNFI_MAC_MODE) {
++		snfi_write_mac(nfi_spi, (u8 *)&cmd, 1);
++		nfi_spi->tx_count++;
++		return 0;
++	}
++
++	nfi_spi->cmd[nfi_spi->cur_cmd_idx++] = cmd;
++	return 0;
++}
++
++static int snfi_send_address(struct nfi *nfi, int col, int row,
++			     int col_cycle,
++			     int row_cycle)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	u32 addr, cycle, temp;
++
++	nb->col = col;
++	nb->row = row;
++
++	if (nfi_spi->snfi_mode == SNFI_MAC_MODE) {
++		addr = row;
++		cycle = row_cycle;
++
++		if (!row_cycle) {
++			addr = col;
++			cycle = col_cycle;
++		}
++
++		temp = nandx_cpu_to_be32(addr) >> ((4 - cycle) << 3);
++		snfi_write_mac(nfi_spi, (u8 *)&temp, cycle);
++		nfi_spi->tx_count += cycle;
++	}  else {
++		nfi_spi->row_addr[nfi_spi->cur_addr_idx++] = row;
++		nfi_spi->col_addr[nfi_spi->cur_addr_idx++] = col;
++	}
++
++	return 0;
++}
++
++static int snfi_trigger(struct nfi *nfi)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++
++	writel(nfi_spi->tx_count, regs + SNF_MAC_OUTL);
++	writel(0, regs + SNF_MAC_INL);
++
++	nfi_spi->tx_count = 0;
++	nfi_spi->cur_cmd_idx = 0;
++	nfi_spi->cur_addr_idx = 0;
++
++	return snfi_mac_op(nb);
++}
++
++static int snfi_select_chip(struct nfi *nfi, int cs)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	val = readl(regs + SNF_MISC_CTL);
++
++	if (cs == 0) {
++		val &= ~SF2CS_SEL;
++		val &= ~SF2CS_EN;
++	} else if (cs == 1) {
++		val |= SF2CS_SEL;
++		val |= SF2CS_EN;
++	} else {
++		return -EIO;
++	}
++
++	writel(val, regs + SNF_MISC_CTL);
++
++	return 0;
++}
++
++static int snfi_set_delay(struct nfi_base *nb, u8 delay_mode)
++{
++	void *regs = nb->res.nfi_regs;
++	struct nfi_spi_delay *delay;
++	u32 val;
++
++	if (delay_mode < 0 || delay_mode > SPI_NAND_MAX_DELAY)
++		return -EINVAL;
++
++	delay = &spi_delay[delay_mode];
++
++	val = delay->tIO_OUT_DLY[0] | delay->tIO_OUT_DLY[1] << 8 |
++	      delay->tIO_OUT_DLY[2] << 16 |
++	      delay->tIO_OUT_DLY[3] << 24;
++	writel(val, regs + SNF_DLY_CTL1);
++
++	val = delay->tIO_IN_DLY[0] | (delay->tIO_IN_DLY[1] << 8) |
++	      delay->tIO_IN_DLY[2] << 16 |
++	      delay->tIO_IN_DLY[3] << 24;
++	writel(val, regs + SNF_DLY_CTL2);
++
++	val = delay->tCLK_SAM_DLY | delay->tCLK_OUT_DLY << 8 |
++	      delay->tCS_DLY << 16 |
++	      delay->tWR_EN_DLY << 24;
++	writel(val, regs + SNF_DLY_CTL3);
++
++	writel(delay->tCS_DLY, regs + SNF_DLY_CTL4);
++
++	val = readl(regs + SNF_MISC_CTL);
++	val |= (delay->tREAD_LATCH_LATENCY) <<
++	       LATCH_LAT_SHIFT;
++	writel(val, regs + SNF_MISC_CTL);
++
++	return 0;
++}
++
++static int snfi_set_timing(struct nfi *nfi, void *timing, int type)
++{
++	/* Nothing need to do. */
++	return 0;
++}
++
++static int snfi_wait_ready(struct nfi *nfi, int type, u32 timeout)
++{
++	/* Nothing need to do. */
++	return 0;
++}
++
++static int snfi_ctrl(struct nfi *nfi, int cmd, void *args)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	int ret = 0;
++
++	if (!args)
++		return -EINVAL;
++
++	switch (cmd) {
++	case NFI_CTRL_DMA:
++		nb->dma_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_NFI_IRQ:
++		nb->nfi_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC_IRQ:
++		nb->ecc_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_PAGE_IRQ:
++		nb->page_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC:
++		nb->ecc_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_BAD_MARK_SWAP:
++		nb->bad_mark_swap_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC_CLOCK:
++		nb->ecc_clk_en = *(bool *)args;
++		break;
++
++	case SNFI_CTRL_OP_MODE:
++		nfi_spi->snfi_mode = *(u8 *)args;
++		break;
++
++	case SNFI_CTRL_RX_MODE:
++		nfi_spi->read_cache_mode = *(u8 *)args;
++		break;
++
++	case SNFI_CTRL_TX_MODE:
++		nfi_spi->write_cache_mode = *(u8 *)args;
++		break;
++
++	case SNFI_CTRL_DELAY_MODE:
++		ret = snfi_set_delay(nb, *(u8 *)args);
++		break;
++
++	default:
++		pr_info("operation not support.\n");
++		ret = -EOPNOTSUPP;
++		break;
++	}
++
++	return ret;
++}
++
++static int snfi_read_bytes(struct nfi *nfi, u8 *data, int count)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++	int ret;
++
++	writel(nfi_spi->tx_count, regs + SNF_MAC_OUTL);
++	writel(count, regs + SNF_MAC_INL);
++
++	ret = snfi_mac_op(nb);
++	if (ret)
++		return ret;
++
++	snfi_read_mac(nfi_spi, data, count);
++
++	nfi_spi->tx_count = 0;
++
++	return 0;
++}
++
++static int snfi_write_bytes(struct nfi *nfi, u8 *data, int count)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++
++	snfi_write_mac(nfi_spi, data, count);
++	nfi_spi->tx_count += count;
++
++	writel(0, regs + SNF_MAC_INL);
++	writel(nfi_spi->tx_count, regs + SNF_MAC_OUTL);
++
++	nfi_spi->tx_count = 0;
++
++	return snfi_mac_op(nb);
++}
++
++static int snfi_reset(struct nfi *nfi)
++{
++	struct nfi_base *nb = nfi_to_base(nfi);
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++	int ret;
++
++	ret = nfi_spi->parent->nfi.reset(nfi);
++	if (ret)
++		return ret;
++
++	val = readl(regs + SNF_MISC_CTL);
++	val |= SW_RST;
++	writel(val, regs + SNF_MISC_CTL);
++
++	ret = readx_poll_timeout_atomic(readw, regs + SNF_STA_CTL1, val,
++					!(val & SPI_STATE), 50,
++					NFI_TIMEOUT);
++	if (ret) {
++		pr_info("spi state active in reset [0x%x] = 0x%x\n",
++			SNF_STA_CTL1, val);
++		return ret;
++	}
++
++	val = readl(regs + SNF_MISC_CTL);
++	val &= ~SW_RST;
++	writel(val, regs + SNF_MISC_CTL);
++
++	return 0;
++}
++
++static int snfi_config_for_write(struct nfi_base *nb, int count)
++{
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	nb->set_op_mode(regs, CNFG_CUSTOM_MODE);
++
++	val = readl(regs + SNF_MISC_CTL);
++
++	if (nfi_spi->write_cache_mode == SNFI_TX_114)
++		val |= PG_LOAD_X4_EN;
++
++	if (nfi_spi->snfi_mode == SNFI_CUSTOM_MODE)
++		val |= PG_LOAD_CUSTOM_EN;
++
++	writel(val, regs + SNF_MISC_CTL);
++
++	val = count * (nb->nfi.sector_size + nb->nfi.sector_spare_size);
++	writel(val << PG_LOAD_SHIFT, regs + SNF_MISC_CTL2);
++
++	val = readl(regs + SNF_PG_CTL1);
++
++	if (nfi_spi->snfi_mode == SNFI_CUSTOM_MODE)
++		val |= nfi_spi->cmd[0] << PG_LOAD_CMD_SHIFT;
++	else {
++		val |= nfi_spi->cmd[0] | nfi_spi->cmd[1] << PG_LOAD_CMD_SHIFT |
++		       nfi_spi->cmd[2] << PG_EXE_CMD_SHIFT;
++
++		writel(nfi_spi->row_addr[1], regs + SNF_PG_CTL3);
++		writel(nfi_spi->cmd[3] << GF_CMD_SHIFT | nfi_spi->col_addr[2] <<
++		       GF_ADDR_SHIFT, regs + SNF_GF_CTL1);
++	}
++
++	writel(val, regs + SNF_PG_CTL1);
++	writel(nfi_spi->col_addr[1], regs + SNF_PG_CTL2);
++
++	writel(NFI_CMD_DUMMY_WR, regs + NFI_CMD);
++
++	return 0;
++}
++
++static int snfi_config_for_read(struct nfi_base *nb, int count)
++{
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++	int ret = 0;
++
++	nb->set_op_mode(regs, CNFG_CUSTOM_MODE);
++
++	val = readl(regs + SNF_MISC_CTL);
++	val &= ~DARA_READ_MODE_MASK;
++
++	switch (nfi_spi->read_cache_mode) {
++
++	case SNFI_RX_111:
++		break;
++
++	case SNFI_RX_112:
++		val |= X2_DATA_MODE << READ_MODE_SHIFT;
++		break;
++
++	case SNFI_RX_114:
++		val |= X4_DATA_MODE << READ_MODE_SHIFT;
++		break;
++
++	case SNFI_RX_122:
++		val |= DUAL_IO_MODE << READ_MODE_SHIFT;
++		break;
++
++	case SNFI_RX_144:
++		val |= QUAD_IO_MODE << READ_MODE_SHIFT;
++		break;
++
++	default:
++		pr_info("Not support this read operarion: %d!\n",
++		       nfi_spi->read_cache_mode);
++		ret = -EINVAL;
++		break;
++	}
++
++	if (nfi_spi->snfi_mode == SNFI_CUSTOM_MODE)
++		val |= DATARD_CUSTOM_EN;
++
++	writel(val, regs + SNF_MISC_CTL);
++
++	val = count * (nb->nfi.sector_size + nb->nfi.sector_spare_size);
++	writel(val, regs + SNF_MISC_CTL2);
++
++	val = readl(regs + SNF_RD_CTL2);
++
++	if (nfi_spi->snfi_mode == SNFI_CUSTOM_MODE) {
++		val |= nfi_spi->cmd[0];
++		writel(nfi_spi->col_addr[1], regs + SNF_RD_CTL3);
++	} else {
++		val |= nfi_spi->cmd[2];
++		writel(nfi_spi->cmd[0] << PAGE_READ_CMD_SHIFT |
++		       nfi_spi->row_addr[0], regs + SNF_RD_CTL1);
++		writel(nfi_spi->cmd[1] << GF_CMD_SHIFT |
++		       nfi_spi->col_addr[1] << GF_ADDR_SHIFT,
++		       regs + SNF_GF_CTL1);
++		writel(nfi_spi->col_addr[2], regs + SNF_RD_CTL3);
++	}
++
++	writel(val, regs + SNF_RD_CTL2);
++
++	writel(NFI_CMD_DUMMY_RD, regs + NFI_CMD);
++
++	return ret;
++}
++
++static bool is_page_empty(struct nfi_base *nb, u8 *data, u8 *fdm,
++			  int sectors)
++{
++	u32 *data32 = (u32 *)data;
++	u32 *fdm32 = (u32 *)fdm;
++	u32 i, count = 0;
++
++	for (i = 0; i < nb->format.page_size >> 2; i++) {
++		if (data32[i] != 0xffff) {
++			count += zero_popcount(data32[i]);
++			if (count > 10) {
++				pr_info("%s %d %d count:%d\n",
++					__func__, __LINE__, i, count);
++				return false;
++			}
++		}
++	}
++
++	if (fdm) {
++		for (i = 0; i < (nb->nfi.fdm_size * sectors >> 2); i++)
++		if (fdm32[i] != 0xffff) {
++			count += zero_popcount(fdm32[i]);
++			if (count > 10) {
++				pr_info("%s %d %d count:%d\n",
++					__func__, __LINE__, i, count);
++				return false;
++			}
++		}
++	}
++
++	return true;
++}
++
++static int rw_prepare(struct nfi_base *nb, int sectors, u8 *data,
++		      u8 *fdm,
++		      bool read)
++{
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	int ret;
++
++	ret = nfi_spi->parent->rw_prepare(nb, sectors, data, fdm, read);
++	if (ret)
++		return ret;
++
++	if (read)
++		ret = snfi_config_for_read(nb, sectors);
++	else
++		ret = snfi_config_for_write(nb, sectors);
++
++	return ret;
++}
++
++static void rw_complete(struct nfi_base *nb, u8 *data, u8 *fdm,
++			bool read)
++{
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++	void *regs = nb->res.nfi_regs;
++	u32 val;
++
++	nfi_spi->parent->rw_complete(nb, data, fdm, read);
++
++	val = readl(regs + SNF_MISC_CTL);
++
++	if (read)
++		val &= ~DATARD_CUSTOM_EN;
++	else
++		val &= ~PG_LOAD_CUSTOM_EN;
++
++	writel(val, regs + SNF_MISC_CTL);
++
++	nfi_spi->tx_count = 0;
++	nfi_spi->cur_cmd_idx = 0;
++	nfi_spi->cur_addr_idx = 0;
++}
++
++static void set_nfi_base_funcs(struct nfi_base *nb)
++{
++	nb->nfi.reset = snfi_reset;
++	nb->nfi.set_timing = snfi_set_timing;
++	nb->nfi.wait_ready = snfi_wait_ready;
++
++	nb->nfi.send_cmd = snfi_send_command;
++	nb->nfi.send_addr = snfi_send_address;
++	nb->nfi.trigger = snfi_trigger;
++	nb->nfi.nfi_ctrl = snfi_ctrl;
++	nb->nfi.select_chip = snfi_select_chip;
++
++	nb->nfi.read_bytes = snfi_read_bytes;
++	nb->nfi.write_bytes = snfi_write_bytes;
++
++	nb->rw_prepare = rw_prepare;
++	nb->rw_complete = rw_complete;
++	nb->is_page_empty = is_page_empty;
++
++}
++
++struct nfi *nfi_extend_init(struct nfi_base *nb)
++{
++	struct nfi_spi *nfi_spi;
++
++	nfi_spi = mem_alloc(1, sizeof(struct nfi_spi));
++	if (!nfi_spi) {
++		pr_info("snfi alloc memory fail @%s.\n", __func__);
++		return NULL;
++	}
++
++	memcpy(&nfi_spi->base, nb, sizeof(struct nfi_base));
++	nfi_spi->parent = nb;
++
++	nfi_spi->read_cache_mode = SNFI_RX_114;
++	nfi_spi->write_cache_mode = SNFI_TX_114;
++
++	set_nfi_base_funcs(&nfi_spi->base);
++
++	/* Change nfi to spi mode */
++	writel(SPI_MODE, nb->res.nfi_regs + SNF_SNF_CNFG);
++
++	return &(nfi_spi->base.nfi);
++}
++
++void nfi_extend_exit(struct nfi_base *nb)
++{
++	struct nfi_spi *nfi_spi = base_to_snfi(nb);
++
++	mem_free(nfi_spi->parent);
++	mem_free(nfi_spi);
++}
++
+diff --git a/drivers/mtd/nandx/core/nfi/nfi_spi.h b/drivers/mtd/nandx/core/nfi/nfi_spi.h
+new file mode 100644
+index 0000000000..a52255663a
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfi_spi.h
+@@ -0,0 +1,44 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFI_SPI_H__
++#define __NFI_SPI_H__
++
++#define SPI_NAND_MAX_DELAY      6
++#define SPI_NAND_MAX_OP         4
++
++/*TODO - add comments */
++struct nfi_spi_delay {
++	u8 tCLK_SAM_DLY;
++	u8 tCLK_OUT_DLY;
++	u8 tCS_DLY;
++	u8 tWR_EN_DLY;
++	u8 tIO_IN_DLY[4];
++	u8 tIO_OUT_DLY[4];
++	u8 tREAD_LATCH_LATENCY;
++};
++
++/* SPI Nand structure */
++struct nfi_spi {
++	struct nfi_base base;
++	struct nfi_base *parent;
++
++	u8 snfi_mode;
++	u8 tx_count;
++
++	u8 cmd[SPI_NAND_MAX_OP];
++	u8 cur_cmd_idx;
++
++	u32 row_addr[SPI_NAND_MAX_OP];
++	u32 col_addr[SPI_NAND_MAX_OP];
++	u8 cur_addr_idx;
++
++	u8 read_cache_mode;
++	u8 write_cache_mode;
++};
++
++#endif /* __NFI_SPI_H__ */
+diff --git a/drivers/mtd/nandx/core/nfi/nfi_spi_regs.h b/drivers/mtd/nandx/core/nfi/nfi_spi_regs.h
+new file mode 100644
+index 0000000000..77adf46782
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfi_spi_regs.h
+@@ -0,0 +1,64 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFI_SPI_REGS_H__
++#define __NFI_SPI_REGS_H__
++
++#define SNF_MAC_CTL             0x500
++#define         WIP                     BIT(0)
++#define         WIP_READY               BIT(1)
++#define         SF_TRIG                 BIT(2)
++#define         SF_MAC_EN               BIT(3)
++#define         MAC_XIO_SEL             BIT(4)
++#define SNF_MAC_OUTL            0x504
++#define SNF_MAC_INL             0x508
++#define SNF_RD_CTL1             0x50c
++#define         PAGE_READ_CMD_SHIFT     24
++#define SNF_RD_CTL2             0x510
++#define SNF_RD_CTL3             0x514
++#define SNF_GF_CTL1             0x518
++#define         GF_ADDR_SHIFT           16
++#define         GF_CMD_SHIFT            24
++#define SNF_GF_CTL3             0x520
++#define SNF_PG_CTL1             0x524
++#define         PG_EXE_CMD_SHIFT        16
++#define         PG_LOAD_CMD_SHIFT       8
++#define SNF_PG_CTL2             0x528
++#define SNF_PG_CTL3             0x52c
++#define SNF_ER_CTL              0x530
++#define SNF_ER_CTL2             0x534
++#define SNF_MISC_CTL            0x538
++#define         SW_RST                  BIT(28)
++#define         PG_LOAD_X4_EN           BIT(20)
++#define         X2_DATA_MODE            1
++#define         X4_DATA_MODE            2
++#define         DUAL_IO_MODE            5
++#define         QUAD_IO_MODE            6
++#define         READ_MODE_SHIFT         16
++#define         LATCH_LAT_SHIFT         8
++#define         LATCH_LAT_MASK          GENMASK(9, 8)
++#define         DARA_READ_MODE_MASK     GENMASK(18, 16)
++#define         SF2CS_SEL               BIT(13)
++#define         SF2CS_EN                BIT(12)
++#define         PG_LOAD_CUSTOM_EN       BIT(7)
++#define         DATARD_CUSTOM_EN        BIT(6)
++#define SNF_MISC_CTL2           0x53c
++#define         PG_LOAD_SHIFT           16
++#define SNF_DLY_CTL1            0x540
++#define SNF_DLY_CTL2            0x544
++#define SNF_DLY_CTL3            0x548
++#define SNF_DLY_CTL4            0x54c
++#define SNF_STA_CTL1            0x550
++#define         SPI_STATE               GENMASK(3, 0)
++#define SNF_STA_CTL2            0x554
++#define SNF_STA_CTL3            0x558
++#define SNF_SNF_CNFG            0x55c
++#define         SPI_MODE                BIT(0)
++#define SNF_DEBUG_SEL           0x560
++#define SPI_GPRAM_ADDR          0x800
++
++#endif /* __NFI_SPI_REGS_H__ */
+diff --git a/drivers/mtd/nandx/core/nfi/nfiecc.c b/drivers/mtd/nandx/core/nfi/nfiecc.c
+new file mode 100644
+index 0000000000..14246fbc3e
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfiecc.c
+@@ -0,0 +1,510 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "nfiecc_regs.h"
++#include "nfiecc.h"
++
++#define NFIECC_IDLE_REG(op) \
++	((op) == ECC_ENCODE ? NFIECC_ENCIDLE : NFIECC_DECIDLE)
++#define         IDLE_MASK       1
++#define NFIECC_CTL_REG(op) \
++	((op) == ECC_ENCODE ? NFIECC_ENCCON : NFIECC_DECCON)
++#define NFIECC_IRQ_REG(op) \
++	((op) == ECC_ENCODE ? NFIECC_ENCIRQEN : NFIECC_DECIRQEN)
++#define NFIECC_ADDR(op) \
++	((op) == ECC_ENCODE ? NFIECC_ENCDIADDR : NFIECC_DECDIADDR)
++
++#define ECC_TIMEOUT     500000
++
++/* ecc strength that each IP supports */
++static const int ecc_strength_mt7622[] = {
++	4, 6, 8, 10, 12, 14, 16
++};
++
++static int nfiecc_irq_handler(void *data)
++{
++	struct nfiecc *ecc = data;
++	void *regs = ecc->res.regs;
++	u32 status;
++
++	status = readl(regs + NFIECC_DECIRQSTA) & DEC_IRQSTA_GEN;
++	if (status) {
++		status = readl(regs + NFIECC_DECDONE);
++		if (!(status & ecc->config.sectors))
++			return NAND_IRQ_NONE;
++
++		/*
++		 * Clear decode IRQ status once again to ensure that
++		 * there will be no extra IRQ.
++		 */
++		readl(regs + NFIECC_DECIRQSTA);
++		ecc->config.sectors = 0;
++		nandx_event_complete(ecc->done);
++	} else {
++		status = readl(regs + NFIECC_ENCIRQSTA) & ENC_IRQSTA_GEN;
++		if (!status)
++			return NAND_IRQ_NONE;
++
++		nandx_event_complete(ecc->done);
++	}
++
++	return NAND_IRQ_HANDLED;
++}
++
++static inline int nfiecc_wait_idle(struct nfiecc *ecc)
++{
++	int op = ecc->config.op;
++	int ret, val;
++
++	ret = readl_poll_timeout_atomic(ecc->res.regs + NFIECC_IDLE_REG(op),
++					val, val & IDLE_MASK,
++					10, ECC_TIMEOUT);
++	if (ret)
++		pr_info("%s not idle\n",
++			op == ECC_ENCODE ? "encoder" : "decoder");
++
++	return ret;
++}
++
++static int nfiecc_wait_encode_done(struct nfiecc *ecc)
++{
++	int ret, val;
++
++	if (ecc->ecc_irq_en) {
++		/* poll one time to avoid missing irq event */
++		ret = readl_poll_timeout_atomic(ecc->res.regs + NFIECC_ENCSTA,
++						val, val & ENC_FSM_IDLE, 1, 1);
++		if (!ret)
++			return 0;
++
++		/* irq done, if not, we can go on to poll status for a while */
++		ret = nandx_event_wait_complete(ecc->done, ECC_TIMEOUT);
++		if (ret)
++			return 0;
++	}
++
++	ret = readl_poll_timeout_atomic(ecc->res.regs + NFIECC_ENCSTA,
++					val, val & ENC_FSM_IDLE,
++					10, ECC_TIMEOUT);
++	if (ret)
++		pr_info("encode timeout\n");
++
++	return ret;
++
++}
++
++static int nfiecc_wait_decode_done(struct nfiecc *ecc)
++{
++	u32 secbit = BIT(ecc->config.sectors - 1);
++	void *regs = ecc->res.regs;
++	int ret, val;
++
++	if (ecc->ecc_irq_en) {
++		ret = readl_poll_timeout_atomic(regs + NFIECC_DECDONE,
++						val, val & secbit, 1, 1);
++		if (!ret)
++			return 0;
++
++		ret = nandx_event_wait_complete(ecc->done, ECC_TIMEOUT);
++		if (ret)
++			return 0;
++	}
++
++	ret = readl_poll_timeout_atomic(regs + NFIECC_DECDONE,
++					val, val & secbit,
++					10, ECC_TIMEOUT);
++	if (ret) {
++		pr_info("decode timeout\n");
++		return ret;
++	}
++
++	/* decode done does not stands for ecc all work done.
++	 * we need check syn, bma, chien, autoc all idle.
++	 * just check it when ECC_DECCNFG[13:12] is 3,
++	 * which means auto correct.
++	 */
++	ret = readl_poll_timeout_atomic(regs + NFIECC_DECFSM,
++					val, (val & FSM_MASK) == FSM_IDLE,
++					10, ECC_TIMEOUT);
++	if (ret)
++		pr_info("decode fsm(0x%x) is not idle\n",
++		       readl(regs + NFIECC_DECFSM));
++
++	return ret;
++}
++
++static int nfiecc_wait_done(struct nfiecc *ecc)
++{
++	if (ecc->config.op == ECC_ENCODE)
++		return nfiecc_wait_encode_done(ecc);
++
++	return nfiecc_wait_decode_done(ecc);
++}
++
++static void nfiecc_encode_config(struct nfiecc *ecc, u32 ecc_idx)
++{
++	struct nfiecc_config *config = &ecc->config;
++	u32 val;
++
++	val = ecc_idx | (config->mode << ecc->caps->ecc_mode_shift);
++
++	if (config->mode == ECC_DMA_MODE)
++		val |= ENC_BURST_EN;
++
++	val |= (config->len << 3) << ENCCNFG_MS_SHIFT;
++	writel(val, ecc->res.regs + NFIECC_ENCCNFG);
++}
++
++static void nfiecc_decode_config(struct nfiecc *ecc, u32 ecc_idx)
++{
++	struct nfiecc_config *config = &ecc->config;
++	u32 dec_sz = (config->len << 3) +
++		     config->strength * ecc->caps->parity_bits;
++	u32 val;
++
++	val = ecc_idx | (config->mode << ecc->caps->ecc_mode_shift);
++
++	if (config->mode == ECC_DMA_MODE)
++		val |= DEC_BURST_EN;
++
++	val |= (dec_sz << DECCNFG_MS_SHIFT) |
++	       (config->deccon << DEC_CON_SHIFT);
++	val |= DEC_EMPTY_EN;
++	writel(val, ecc->res.regs + NFIECC_DECCNFG);
++}
++
++static void nfiecc_config(struct nfiecc *ecc)
++{
++	u32 idx;
++
++	for (idx = 0; idx < ecc->caps->ecc_strength_num; idx++) {
++		if (ecc->config.strength == ecc->caps->ecc_strength[idx])
++			break;
++	}
++
++	if (ecc->config.op == ECC_ENCODE)
++		nfiecc_encode_config(ecc, idx);
++	else
++		nfiecc_decode_config(ecc, idx);
++}
++
++static int nfiecc_enable(struct nfiecc *ecc)
++{
++	enum nfiecc_operation op = ecc->config.op;
++	void *regs = ecc->res.regs;
++
++	nfiecc_config(ecc);
++
++	writel(ECC_OP_EN, regs + NFIECC_CTL_REG(op));
++
++	if (ecc->ecc_irq_en) {
++		writel(ECC_IRQEN, regs + NFIECC_IRQ_REG(op));
++
++		if (ecc->page_irq_en)
++			writel(ECC_IRQEN | ECC_PG_IRQ_SEL,
++			       regs + NFIECC_IRQ_REG(op));
++
++		nandx_event_init(ecc->done);
++	}
++
++	return 0;
++}
++
++static int nfiecc_disable(struct nfiecc *ecc)
++{
++	enum nfiecc_operation op = ecc->config.op;
++	void *regs = ecc->res.regs;
++
++	nfiecc_wait_idle(ecc);
++
++	writel(0, regs + NFIECC_IRQ_REG(op));
++	writel(~ECC_OP_EN, regs + NFIECC_CTL_REG(op));
++
++	return 0;
++}
++
++static int nfiecc_correct_data(struct nfiecc *ecc,
++			       struct nfiecc_status *status,
++			       u8 *data, u32 sector)
++{
++	u32 err, offset, i;
++	u32 loc, byteloc, bitloc;
++
++	status->corrected = 0;
++	status->failed = 0;
++
++	offset = (sector >> 2);
++	err = readl(ecc->res.regs + NFIECC_DECENUM(offset));
++	err >>= (sector % 4) * 8;
++	err &= ecc->caps->err_mask;
++
++	if (err == ecc->caps->err_mask) {
++		status->failed++;
++		return -ENANDREAD;
++	}
++
++	status->corrected += err;
++	status->bitflips = max_t(u32, status->bitflips, err);
++
++	for (i = 0; i < err; i++) {
++		loc = readl(ecc->res.regs + NFIECC_DECEL(i >> 1));
++		loc >>= ((i & 0x1) << 4);
++		byteloc = loc >> 3;
++		bitloc = loc & 0x7;
++		data[byteloc] ^= (1 << bitloc);
++	}
++
++	return 0;
++}
++
++static int nfiecc_fill_data(struct nfiecc *ecc, u8 *data)
++{
++	struct nfiecc_config *config = &ecc->config;
++	void *regs = ecc->res.regs;
++	int size, ret, i;
++	u32 val;
++
++	if (config->mode == ECC_DMA_MODE) {
++		if ((unsigned long)config->dma_addr & 0x3)
++			pr_info("encode address is not 4B aligned: 0x%x\n",
++			       (u32)(unsigned long)config->dma_addr);
++
++		writel((unsigned long)config->dma_addr,
++		       regs + NFIECC_ADDR(config->op));
++	} else if (config->mode == ECC_PIO_MODE) {
++		if (config->op == ECC_ENCODE) {
++			size = (config->len + 3) >> 2;
++		} else {
++			size = config->strength * ecc->caps->parity_bits;
++			size = (size + 7) >> 3;
++			size += config->len;
++			size >>= 2;
++		}
++
++		for (i = 0; i < size; i++) {
++			ret = readl_poll_timeout_atomic(regs + NFIECC_PIO_DIRDY,
++							val, val & PIO_DI_RDY,
++							10, ECC_TIMEOUT);
++			if (ret)
++				return ret;
++
++			writel(*((u32 *)data + i), regs + NFIECC_PIO_DI);
++		}
++	}
++
++	return 0;
++}
++
++static int nfiecc_encode(struct nfiecc *ecc, u8 *data)
++{
++	struct nfiecc_config *config = &ecc->config;
++	u32 len, i, val = 0;
++	u8 *p;
++	int ret;
++
++	/* Under NFI mode, nothing need to do */
++	if (config->mode == ECC_NFI_MODE)
++		return 0;
++
++	ret = nfiecc_fill_data(ecc, data);
++	if (ret)
++		return ret;
++
++	ret = nfiecc_wait_encode_done(ecc);
++	if (ret)
++		return ret;
++
++	ret = nfiecc_wait_idle(ecc);
++	if (ret)
++		return ret;
++
++	/* Program ECC bytes to OOB: per sector oob = FDM + ECC + SPARE */
++	len = (config->strength * ecc->caps->parity_bits + 7) >> 3;
++	p = data + config->len;
++
++	/* Write the parity bytes generated by the ECC back to the OOB region */
++	for (i = 0; i < len; i++) {
++		if ((i % 4) == 0)
++			val = readl(ecc->res.regs + NFIECC_ENCPAR(i / 4));
++
++		p[i] = (val >> ((i % 4) * 8)) & 0xff;
++	}
++
++	return 0;
++}
++
++static int nfiecc_decode(struct nfiecc *ecc, u8 *data)
++{
++	int ret;
++
++	/* Under NFI mode, nothing need to do */
++	if (ecc->config.mode == ECC_NFI_MODE)
++		return 0;
++
++	ret = nfiecc_fill_data(ecc, data);
++	if (ret)
++		return ret;
++
++	return nfiecc_wait_decode_done(ecc);
++}
++
++static int nfiecc_decode_status(struct nfiecc *ecc, u32 start_sector,
++				u32 sectors)
++{
++	void *regs = ecc->res.regs;
++	u32 i, val = 0, err;
++	u32 bitflips = 0;
++
++	for (i = start_sector; i < start_sector + sectors; i++) {
++		if ((i % 4) == 0)
++			val = readl(regs + NFIECC_DECENUM(i / 4));
++
++		err = val >> ((i % 4) * 5);
++		err &= ecc->caps->err_mask;
++
++		if (err == ecc->caps->err_mask)
++			pr_err("sector %d is uncorrect\n", i);
++
++		bitflips = max_t(u32, bitflips, err);
++	}
++
++	if (bitflips == ecc->caps->err_mask)
++		return -ENANDREAD;
++
++	if (bitflips)
++		pr_info("bitflips %d is corrected\n", bitflips);
++
++	return bitflips;
++}
++
++static int nfiecc_adjust_strength(struct nfiecc *ecc, int strength)
++{
++	struct nfiecc_caps *caps = ecc->caps;
++	int i, count = caps->ecc_strength_num;
++
++	if (strength >= caps->ecc_strength[count - 1])
++		return caps->ecc_strength[count - 1];
++
++	if (strength < caps->ecc_strength[0])
++		return -EINVAL;
++
++	for (i = 1; i < count; i++) {
++		if (strength < caps->ecc_strength[i])
++			return caps->ecc_strength[i - 1];
++	}
++
++	return -EINVAL;
++}
++
++static int nfiecc_ctrl(struct nfiecc *ecc, int cmd, void *args)
++{
++	int ret = 0;
++
++	switch (cmd) {
++	case NFI_CTRL_ECC_IRQ:
++		ecc->ecc_irq_en = *(bool *)args;
++		break;
++
++	case NFI_CTRL_ECC_PAGE_IRQ:
++		ecc->page_irq_en = *(bool *)args;
++		break;
++
++	default:
++		pr_info("invalid arguments.\n");
++		ret = -EINVAL;
++		break;
++	}
++
++	return ret;
++}
++
++static int nfiecc_hw_init(struct nfiecc *ecc)
++{
++	int ret;
++
++	ret = nfiecc_wait_idle(ecc);
++	if (ret)
++		return ret;
++
++	writel(~ECC_OP_EN, ecc->res.regs + NFIECC_ENCCON);
++
++	ret = nfiecc_wait_idle(ecc);
++	if (ret)
++		return ret;
++
++	writel(~ECC_OP_EN, ecc->res.regs + NFIECC_DECCON);
++
++	return 0;
++}
++
++static struct nfiecc_caps nfiecc_caps_mt7622 = {
++	.err_mask = 0x1f,
++	.ecc_mode_shift = 4,
++	.parity_bits = 13,
++	.ecc_strength = ecc_strength_mt7622,
++	.ecc_strength_num = 7,
++};
++
++static struct nfiecc_caps *nfiecc_get_match_data(enum mtk_ic_version ic)
++{
++	/* NOTE: add other IC's data */
++	return &nfiecc_caps_mt7622;
++}
++
++struct nfiecc *nfiecc_init(struct nfiecc_resource *res)
++{
++	struct nfiecc *ecc;
++	int ret;
++
++	ecc = mem_alloc(1, sizeof(struct nfiecc));
++	if (!ecc)
++		return NULL;
++
++	ecc->res = *res;
++
++	ret = nandx_irq_register(res->dev, res->irq_id, nfiecc_irq_handler,
++				 "mtk-ecc", ecc);
++	if (ret) {
++		pr_info("ecc irq register failed!\n");
++		goto error;
++	}
++
++	ecc->ecc_irq_en = false;
++	ecc->page_irq_en = false;
++	ecc->done = nandx_event_create();
++	ecc->caps = nfiecc_get_match_data(res->ic_ver);
++
++	ecc->adjust_strength = nfiecc_adjust_strength;
++	ecc->enable = nfiecc_enable;
++	ecc->disable = nfiecc_disable;
++	ecc->decode = nfiecc_decode;
++	ecc->encode = nfiecc_encode;
++	ecc->wait_done = nfiecc_wait_done;
++	ecc->decode_status = nfiecc_decode_status;
++	ecc->correct_data = nfiecc_correct_data;
++	ecc->nfiecc_ctrl = nfiecc_ctrl;
++
++	ret = nfiecc_hw_init(ecc);
++	if (ret)
++		return NULL;
++
++	return ecc;
++
++error:
++	mem_free(ecc);
++
++	return NULL;
++}
++
++void nfiecc_exit(struct nfiecc *ecc)
++{
++	nandx_event_destroy(ecc->done);
++	mem_free(ecc);
++}
++
+diff --git a/drivers/mtd/nandx/core/nfi/nfiecc.h b/drivers/mtd/nandx/core/nfi/nfiecc.h
+new file mode 100644
+index 0000000000..b02a5c3534
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfiecc.h
+@@ -0,0 +1,90 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFIECC_H__
++#define __NFIECC_H__
++
++enum nfiecc_mode {
++	ECC_DMA_MODE,
++	ECC_NFI_MODE,
++	ECC_PIO_MODE
++};
++
++enum nfiecc_operation {
++	ECC_ENCODE,
++	ECC_DECODE
++};
++
++enum nfiecc_deccon {
++	ECC_DEC_FER = 1,
++	ECC_DEC_LOCATE = 2,
++	ECC_DEC_CORRECT = 3
++};
++
++struct nfiecc_resource {
++	int ic_ver;
++	void *dev;
++	void *regs;
++	int irq_id;
++
++};
++
++struct nfiecc_status {
++	u32 corrected;
++	u32 failed;
++	u32 bitflips;
++};
++
++struct nfiecc_caps {
++	u32 err_mask;
++	u32 ecc_mode_shift;
++	u32 parity_bits;
++	const int *ecc_strength;
++	u32 ecc_strength_num;
++};
++
++struct nfiecc_config {
++	enum nfiecc_operation op;
++	enum nfiecc_mode mode;
++	enum nfiecc_deccon deccon;
++
++	void *dma_addr; /* DMA use only */
++	u32 strength;
++	u32 sectors;
++	u32 len;
++};
++
++struct nfiecc {
++	struct nfiecc_resource res;
++	struct nfiecc_config config;
++	struct nfiecc_caps *caps;
++
++	bool ecc_irq_en;
++	bool page_irq_en;
++
++	void *done;
++
++	int (*adjust_strength)(struct nfiecc *ecc, int strength);
++	int (*enable)(struct nfiecc *ecc);
++	int (*disable)(struct nfiecc *ecc);
++
++	int (*decode)(struct nfiecc *ecc, u8 *data);
++	int (*encode)(struct nfiecc *ecc, u8 *data);
++
++	int (*decode_status)(struct nfiecc *ecc, u32 start_sector, u32 sectors);
++	int (*correct_data)(struct nfiecc *ecc,
++			    struct nfiecc_status *status,
++			    u8 *data, u32 sector);
++	int (*wait_done)(struct nfiecc *ecc);
++
++	int (*nfiecc_ctrl)(struct nfiecc *ecc, int cmd, void *args);
++};
++
++struct nfiecc *nfiecc_init(struct nfiecc_resource *res);
++void nfiecc_exit(struct nfiecc *ecc);
++
++#endif /* __NFIECC_H__ */
+diff --git a/drivers/mtd/nandx/core/nfi/nfiecc_regs.h b/drivers/mtd/nandx/core/nfi/nfiecc_regs.h
+new file mode 100644
+index 0000000000..96564cf872
+--- /dev/null
++++ b/drivers/mtd/nandx/core/nfi/nfiecc_regs.h
+@@ -0,0 +1,51 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NFIECC_REGS_H__
++#define __NFIECC_REGS_H__
++
++#define NFIECC_ENCCON           0x000
++/* NFIECC_DECCON has same bit define */
++#define         ECC_OP_EN               BIT(0)
++#define NFIECC_ENCCNFG          0x004
++#define         ENCCNFG_MS_SHIFT        16
++#define         ENC_BURST_EN            BIT(8)
++#define NFIECC_ENCDIADDR        0x008
++#define NFIECC_ENCIDLE          0x00c
++#define NFIECC_ENCSTA           0x02c
++#define         ENC_FSM_IDLE            1
++#define NFIECC_ENCIRQEN         0x030
++/* NFIECC_DECIRQEN has same bit define */
++#define         ECC_IRQEN               BIT(0)
++#define         ECC_PG_IRQ_SEL          BIT(1)
++#define NFIECC_ENCIRQSTA        0x034
++#define         ENC_IRQSTA_GEN          BIT(0)
++#define NFIECC_PIO_DIRDY        0x080
++#define         PIO_DI_RDY              BIT(0)
++#define NFIECC_PIO_DI           0x084
++#define NFIECC_DECCON           0x100
++#define NFIECC_DECCNFG          0x104
++#define         DEC_BURST_EN            BIT(8)
++#define         DEC_EMPTY_EN            BIT(31)
++#define         DEC_CON_SHIFT           12
++#define         DECCNFG_MS_SHIFT        16
++#define NFIECC_DECDIADDR        0x108
++#define NFIECC_DECIDLE          0x10c
++#define NFIECC_DECENUM(x)       (0x114 + (x) * 4)
++#define NFIECC_DECDONE          0x11c
++#define NFIECC_DECIRQEN         0x140
++#define NFIECC_DECIRQSTA        0x144
++#define         DEC_IRQSTA_GEN          BIT(0)
++#define NFIECC_DECFSM           0x14c
++#define         FSM_MASK                0x7f0f0f0f
++#define         FSM_IDLE                0x01010101
++#define NFIECC_BYPASS           0x20c
++#define         NFIECC_BYPASS_EN        BIT(0)
++#define NFIECC_ENCPAR(x)        (0x010 + (x) * 4)
++#define NFIECC_DECEL(x)         (0x120 + (x) * 4)
++
++#endif /* __NFIECC_REGS_H__ */
+diff --git a/drivers/mtd/nandx/driver/Nandx.mk b/drivers/mtd/nandx/driver/Nandx.mk
+new file mode 100644
+index 0000000000..3fb93d37c5
+--- /dev/null
++++ b/drivers/mtd/nandx/driver/Nandx.mk
+@@ -0,0 +1,18 @@
++#
++# Copyright (C) 2017 MediaTek Inc.
++# Licensed under either
++#     BSD Licence, (see NOTICE for more details)
++#     GNU General Public License, version 2.0, (see NOTICE for more details)
++#
++
++nandx-$(NANDX_SIMULATOR_SUPPORT) += simulator/driver.c
++
++nandx-$(NANDX_CTP_SUPPORT) += ctp/ts_nand.c
++nandx-$(NANDX_CTP_SUPPORT) += ctp/nand_test.c
++nandx-header-$(NANDX_CTP_SUPPORT) += ctp/nand_test.h
++
++nandx-$(NANDX_BBT_SUPPORT) += bbt/bbt.c
++nandx-$(NANDX_BROM_SUPPORT) += brom/driver.c
++nandx-$(NANDX_KERNEL_SUPPORT) += kernel/driver.c
++nandx-$(NANDX_LK_SUPPORT) += lk/driver.c
++nandx-$(NANDX_UBOOT_SUPPORT) += uboot/driver.c
+diff --git a/drivers/mtd/nandx/driver/bbt/bbt.c b/drivers/mtd/nandx/driver/bbt/bbt.c
+new file mode 100644
+index 0000000000..c9d4823e09
+--- /dev/null
++++ b/drivers/mtd/nandx/driver/bbt/bbt.c
+@@ -0,0 +1,408 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include "nandx_util.h"
++#include "nandx_core.h"
++#include "bbt.h"
++
++/* Not support: multi-chip */
++static u8 main_bbt_pattern[] = {'B', 'b', 't', '0' };
++static u8 mirror_bbt_pattern[] = {'1', 't', 'b', 'B' };
++
++static struct bbt_manager g_bbt_manager = {
++	{	{{main_bbt_pattern, 4}, 0, BBT_INVALID_ADDR},
++		{{mirror_bbt_pattern, 4}, 0, BBT_INVALID_ADDR}
++	},
++	NAND_BBT_SCAN_MAXBLOCKS, NULL
++};
++
++static inline void set_bbt_mark(u8 *bbt, int block, u8 mark)
++{
++	int index, offset;
++
++	index = GET_ENTRY(block);
++	offset = GET_POSITION(block);
++
++	bbt[index] &= ~(BBT_ENTRY_MASK << offset);
++	bbt[index] |= (mark & BBT_ENTRY_MASK) << offset;
++	pr_info("%s %d block:%d, bbt[%d]:0x%x, offset:%d, mark:%d\n",
++		__func__, __LINE__, block, index, bbt[index], offset, mark);
++}
++
++static inline u8 get_bbt_mark(u8 *bbt, int block)
++{
++	int offset = GET_POSITION(block);
++	int index = GET_ENTRY(block);
++	u8 value = bbt[index];
++
++	return (value >> offset) & BBT_ENTRY_MASK;
++}
++
++static void mark_nand_bad(struct nandx_info *nand, int block)
++{
++	u8 *buf;
++
++	buf = mem_alloc(1, nand->page_size + nand->oob_size);
++	if (!buf) {
++		pr_info("%s, %d, memory alloc fail, pagesize:%d, oobsize:%d\n",
++		       __func__, __LINE__, nand->page_size, nand->oob_size);
++		return;
++	}
++	memset(buf, 0, nand->page_size + nand->oob_size);
++	nandx_erase(block * nand->block_size, nand->block_size);
++	nandx_write(buf, buf + nand->page_size, block * nand->block_size,
++		    nand->page_size);
++	mem_free(buf);
++}
++
++static inline bool is_bbt_data(u8 *buf, struct bbt_pattern *pattern)
++{
++	int i;
++
++	for (i = 0; i < pattern->len; i++) {
++		if (buf[i] != pattern->data[i])
++			return false;
++	}
++
++	return true;
++}
++
++static u64 get_bbt_address(struct nandx_info *nand, u8 *bbt,
++			   u64 mirror_addr,
++			   int max_blocks)
++{
++	u64 addr, end_addr;
++	u8 mark;
++
++	addr = nand->total_size;
++	end_addr = nand->total_size - nand->block_size * max_blocks;
++
++	while (addr > end_addr) {
++		addr -= nand->block_size;
++		mark = get_bbt_mark(bbt, div_down(addr, nand->block_size));
++
++		if (mark == BBT_BLOCK_WORN || mark == BBT_BLOCK_FACTORY_BAD)
++			continue;
++		if (addr != mirror_addr)
++			return addr;
++	}
++
++	return BBT_INVALID_ADDR;
++}
++
++static int read_bbt(struct bbt_desc *desc, u8 *bbt, u32 len)
++{
++	int ret;
++
++	ret = nandx_read(bbt, NULL, desc->bbt_addr + desc->pattern.len + 1,
++			 len);
++	if (ret < 0)
++		pr_info("nand_bbt: error reading BBT page, ret:-%x\n", ret);
++
++	return ret;
++}
++
++static void create_bbt(struct nandx_info *nand, u8 *bbt)
++{
++	u32 offset = 0, block = 0;
++
++	do {
++		if (nandx_is_bad_block(offset)) {
++			pr_info("Create bbt at bad block:%d\n", block);
++			set_bbt_mark(bbt, block, BBT_BLOCK_FACTORY_BAD);
++		}
++		block++;
++		offset += nand->block_size;
++	} while (offset < nand->total_size);
++}
++
++static int search_bbt(struct nandx_info *nand, struct bbt_desc *desc,
++		      int max_blocks)
++{
++	u64 addr, end_addr;
++	u8 *buf;
++	int ret;
++
++	buf = mem_alloc(1, nand->page_size);
++	if (!buf) {
++		pr_info("%s, %d, mem alloc fail!!! len:%d\n",
++		       __func__, __LINE__, nand->page_size);
++		return -ENOMEM;
++	}
++
++	addr = nand->total_size;
++	end_addr = nand->total_size - max_blocks * nand->block_size;
++	while (addr > end_addr) {
++		addr -= nand->block_size;
++
++		nandx_read(buf, NULL, addr, nand->page_size);
++
++		if (is_bbt_data(buf, &desc->pattern)) {
++			desc->bbt_addr = addr;
++			desc->version = buf[desc->pattern.len];
++			pr_info("BBT is found at addr 0x%llx, version %d\n",
++				desc->bbt_addr, desc->version);
++			ret = 0;
++			break;
++		}
++		ret = -EFAULT;
++	}
++
++	mem_free(buf);
++	return ret;
++}
++
++static int save_bbt(struct nandx_info *nand, struct bbt_desc *desc,
++		    u8 *bbt)
++{
++	u32 page_size_mask, total_block;
++	int write_len;
++	u8 *buf;
++	int ret;
++
++	ret = nandx_erase(desc->bbt_addr, nand->block_size);
++	if (ret) {
++		pr_info("erase addr 0x%llx fail !!!, ret %d\n",
++			desc->bbt_addr, ret);
++		return ret;
++	}
++
++	total_block = div_down(nand->total_size, nand->block_size);
++	write_len = GET_BBT_LENGTH(total_block) + desc->pattern.len + 1;
++	page_size_mask = nand->page_size - 1;
++	write_len = (write_len + page_size_mask) & (~page_size_mask);
++
++	buf = (u8 *)mem_alloc(1, write_len);
++	if (!buf) {
++		pr_info("%s, %d, mem alloc fail!!! len:%d\n",
++		       __func__, __LINE__, write_len);
++		return -ENOMEM;
++	}
++	memset(buf, 0xFF, write_len);
++
++	memcpy(buf, desc->pattern.data, desc->pattern.len);
++	buf[desc->pattern.len] = desc->version;
++
++	memcpy(buf + desc->pattern.len + 1, bbt, GET_BBT_LENGTH(total_block));
++
++	ret = nandx_write(buf, NULL, desc->bbt_addr, write_len);
++
++	if (ret)
++		pr_info("nandx_write fail(%d), offset:0x%llx, len(%d)\n",
++		       ret, desc->bbt_addr, write_len);
++	mem_free(buf);
++
++	return ret;
++}
++
++static int write_bbt(struct nandx_info *nand, struct bbt_desc *main,
++		     struct bbt_desc *mirror, u8 *bbt, int max_blocks)
++{
++	int block;
++	int ret;
++
++	do {
++		if (main->bbt_addr == BBT_INVALID_ADDR) {
++			main->bbt_addr = get_bbt_address(nand, bbt,
++					 mirror->bbt_addr, max_blocks);
++			if (main->bbt_addr == BBT_INVALID_ADDR)
++				return -ENOSPC;
++		}
++
++		ret = save_bbt(nand, main, bbt);
++		if (!ret)
++			break;
++
++		block = div_down(main->bbt_addr, nand->block_size);
++		set_bbt_mark(bbt, block, BBT_BLOCK_WORN);
++		main->version++;
++		mark_nand_bad(nand, block);
++		main->bbt_addr = BBT_INVALID_ADDR;
++	} while (1);
++
++	return 0;
++}
++
++static void mark_bbt_region(struct nandx_info *nand, u8 *bbt, int bbt_blocks)
++{
++	int total_block;
++	int block;
++	u8 mark;
++
++	total_block = div_down(nand->total_size, nand->block_size);
++	block = total_block - bbt_blocks;
++
++	while (bbt_blocks) {
++		mark = get_bbt_mark(bbt, block);
++		if (mark == BBT_BLOCK_GOOD)
++			set_bbt_mark(bbt, block, BBT_BLOCK_RESERVED);
++		block++;
++		bbt_blocks--;
++	}
++}
++
++static void unmark_bbt_region(struct nandx_info *nand, u8 *bbt, int bbt_blocks)
++{
++	int total_block;
++	int block;
++	u8 mark;
++
++	total_block = div_down(nand->total_size, nand->block_size);
++	block = total_block - bbt_blocks;
++
++	while (bbt_blocks) {
++		mark = get_bbt_mark(bbt, block);
++		if (mark == BBT_BLOCK_RESERVED)
++			set_bbt_mark(bbt, block, BBT_BLOCK_GOOD);
++		block++;
++		bbt_blocks--;
++	}
++}
++
++static int update_bbt(struct nandx_info *nand, struct bbt_desc *desc,
++		      u8 *bbt,
++		      int max_blocks)
++{
++	int ret = 0, i;
++
++	/* The reserved info is not stored in NAND*/
++	unmark_bbt_region(nand, bbt, max_blocks);
++
++	desc[0].version++;
++	for (i = 0; i < 2; i++) {
++		if (i > 0)
++			desc[i].version = desc[i - 1].version;
++
++		ret = write_bbt(nand, &desc[i], &desc[1 - i], bbt, max_blocks);
++		if (ret)
++			break;
++	}
++	mark_bbt_region(nand, bbt, max_blocks);
++
++	return ret;
++}
++
++int scan_bbt(struct nandx_info *nand)
++{
++	struct bbt_manager *manager = &g_bbt_manager;
++	struct bbt_desc *pdesc;
++	int total_block, len, i;
++	int valid_desc = 0;
++	int ret = 0;
++	u8 *bbt;
++
++	total_block = div_down(nand->total_size, nand->block_size);
++	len = GET_BBT_LENGTH(total_block);
++
++	if (!manager->bbt) {
++		manager->bbt = (u8 *)mem_alloc(1, len);
++		if (!manager->bbt) {
++			pr_info("%s, %d, mem alloc fail!!! len:%d\n",
++			       __func__, __LINE__, len);
++			return -ENOMEM;
++		}
++	}
++	bbt = manager->bbt;
++	memset(bbt, 0xFF, len);
++
++	/* scan bbt */
++	for (i = 0; i < 2; i++) {
++		pdesc = &manager->desc[i];
++		pdesc->bbt_addr = BBT_INVALID_ADDR;
++		pdesc->version = 0;
++		ret = search_bbt(nand, pdesc, manager->max_blocks);
++		if (!ret && (pdesc->bbt_addr != BBT_INVALID_ADDR))
++			valid_desc += 1 << i;
++	}
++
++	pdesc = &manager->desc[0];
++	if ((valid_desc == 0x3) && (pdesc[0].version != pdesc[1].version))
++		valid_desc = (pdesc[0].version > pdesc[1].version) ? 1 : 2;
++
++	/* read bbt */
++	for (i = 0; i < 2; i++) {
++		if (!(valid_desc & (1 << i)))
++			continue;
++		ret = read_bbt(&pdesc[i], bbt, len);
++		if (ret) {
++			pdesc->bbt_addr = BBT_INVALID_ADDR;
++			pdesc->version = 0;
++			valid_desc &= ~(1 << i);
++		}
++		/* If two BBT version is same, only need to read the first bbt*/
++		if ((valid_desc == 0x3) &&
++		    (pdesc[0].version == pdesc[1].version))
++			break;
++	}
++
++	if (!valid_desc) {
++		create_bbt(nand, bbt);
++		pdesc[0].version = 1;
++		pdesc[1].version = 1;
++	}
++
++	pdesc[0].version = max_t(u8, pdesc[0].version, pdesc[1].version);
++	pdesc[1].version = pdesc[0].version;
++
++	for (i = 0; i < 2; i++) {
++		if (valid_desc & (1 << i))
++			continue;
++
++		ret = write_bbt(nand, &pdesc[i], &pdesc[1 - i], bbt,
++				manager->max_blocks);
++		if (ret) {
++			pr_info("write bbt(%d) fail, ret:%d\n", i, ret);
++			manager->bbt = NULL;
++			return ret;
++		}
++	}
++
++	/* Prevent the bbt regions from erasing / writing */
++	mark_bbt_region(nand, manager->bbt, manager->max_blocks);
++
++	for (i = 0; i < total_block; i++) {
++		if (get_bbt_mark(manager->bbt, i) == BBT_BLOCK_WORN)
++			pr_info("Checked WORN bad blk: %d\n", i);
++		else if (get_bbt_mark(manager->bbt, i) == BBT_BLOCK_FACTORY_BAD)
++			pr_info("Checked Factory bad blk: %d\n", i);
++		else if (get_bbt_mark(manager->bbt, i) == BBT_BLOCK_RESERVED)
++			pr_info("Checked Reserved blk: %d\n", i);
++		else if (get_bbt_mark(manager->bbt, i) != BBT_BLOCK_GOOD)
++			pr_info("Checked unknown blk: %d\n", i);
++	}
++
++	return 0;
++}
++
++int bbt_mark_bad(struct nandx_info *nand, off_t offset)
++{
++	struct bbt_manager *manager = &g_bbt_manager;
++	int block = div_down(offset, nand->block_size);
++	int ret = 0;
++
++	mark_nand_bad(nand, block);
++
++#if 0
++	set_bbt_mark(manager->bbt, block, BBT_BLOCK_WORN);
++
++	/* Update flash-based bad block table */
++	ret = update_bbt(nand, manager->desc, manager->bbt,
++			 manager->max_blocks);
++#endif
++	pr_info("block %d, update result %d.\n", block, ret);
++
++	return ret;
++}
++
++int bbt_is_bad(struct nandx_info *nand, off_t offset)
++{
++	int block;
++
++	block = div_down(offset, nand->block_size);
++
++	return get_bbt_mark(g_bbt_manager.bbt, block) != BBT_BLOCK_GOOD;
++}
+diff --git a/drivers/mtd/nandx/driver/uboot/driver.c b/drivers/mtd/nandx/driver/uboot/driver.c
+new file mode 100644
+index 0000000000..7bd3342452
+--- /dev/null
++++ b/drivers/mtd/nandx/driver/uboot/driver.c
+@@ -0,0 +1,574 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#include <common.h>
++#include <linux/io.h>
++#include <dm.h>
++#include <clk.h>
++#include <nand.h>
++#include <linux/iopoll.h>
++#include <linux/delay.h>
++#include <linux/mtd/nand.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/partitions.h>
++#include "nandx_core.h"
++#include "nandx_util.h"
++#include "bbt.h"
++
++typedef int (*func_nandx_operation)(u8 *, u8 *, u64, size_t);
++
++struct nandx_clk {
++	struct clk *nfi_clk;
++	struct clk *ecc_clk;
++	struct clk *snfi_clk;
++	struct clk *snfi_clk_sel;
++	struct clk *snfi_parent_50m;
++};
++
++struct nandx_nfc {
++	struct nandx_info info;
++	struct nandx_clk clk;
++	struct nfi_resource *res;
++
++	struct nand_chip *nand;
++	spinlock_t lock;
++};
++
++/* Default flash layout for MTK nand controller
++ * 64Bytes oob format.
++ */
++static struct nand_ecclayout eccoob = {
++	.eccbytes = 42,
++	.eccpos = {
++		17, 18, 19, 20, 21, 22, 23, 24, 25,
++		26, 27, 28, 29, 30, 31, 32, 33, 34,
++		35, 36, 37, 38, 39, 40, 41
++	},
++	.oobavail = 16,
++	.oobfree = {
++			{
++			.offset = 0,
++			.length = 16,
++			},
++	}
++};
++
++static struct nandx_nfc *mtd_to_nfc(struct mtd_info *mtd)
++{
++	struct nand_chip *nand = mtd_to_nand(mtd);
++
++	return (struct nandx_nfc *)nand_get_controller_data(nand);
++}
++
++static int nandx_enable_clk(struct nandx_clk *clk)
++{
++	int ret;
++
++	ret = clk_enable(clk->nfi_clk);
++	if (ret) {
++		pr_info("failed to enable nfi clk\n");
++		return ret;
++	}
++
++	ret = clk_enable(clk->ecc_clk);
++	if (ret) {
++		pr_info("failed to enable ecc clk\n");
++		goto disable_nfi_clk;
++	}
++
++	ret = clk_enable(clk->snfi_clk);
++	if (ret) {
++		pr_info("failed to enable snfi clk\n");
++		goto disable_ecc_clk;
++	}
++
++	ret = clk_enable(clk->snfi_clk_sel);
++	if (ret) {
++		pr_info("failed to enable snfi clk sel\n");
++		goto disable_snfi_clk;
++	}
++
++	ret = clk_set_parent(clk->snfi_clk_sel, clk->snfi_parent_50m);
++	if (ret) {
++		pr_info("failed to set snfi parent 50MHz\n");
++		goto disable_snfi_clk;
++	}
++
++	return 0;
++
++disable_snfi_clk:
++	clk_disable(clk->snfi_clk);
++disable_ecc_clk:
++	clk_disable(clk->ecc_clk);
++disable_nfi_clk:
++	clk_disable(clk->nfi_clk);
++
++	return ret;
++}
++
++static void nandx_disable_clk(struct nandx_clk *clk)
++{
++	clk_disable(clk->ecc_clk);
++	clk_disable(clk->nfi_clk);
++	clk_disable(clk->snfi_clk);
++}
++
++static int mtk_nfc_ooblayout_free(struct mtd_info *mtd, int section,
++				  struct mtd_oob_region *oob_region)
++{
++	struct nandx_nfc *nfc = (struct nandx_nfc *)mtd_to_nfc(mtd);
++	u32 eccsteps;
++
++	eccsteps = div_down(mtd->writesize, mtd->ecc_step_size);
++
++	if (section >= eccsteps)
++		return -EINVAL;
++
++	oob_region->length = nfc->info.fdm_reg_size - nfc->info.fdm_ecc_size;
++	oob_region->offset = section * nfc->info.fdm_reg_size
++		+ nfc->info.fdm_ecc_size;
++
++	return 0;
++}
++
++static int mtk_nfc_ooblayout_ecc(struct mtd_info *mtd, int section,
++				 struct mtd_oob_region *oob_region)
++{
++	struct nandx_nfc *nfc = (struct nandx_nfc *)mtd_to_nfc(mtd);
++	u32 eccsteps;
++
++	if (section)
++		return -EINVAL;
++
++	eccsteps = div_down(mtd->writesize, mtd->ecc_step_size);
++	oob_region->offset = nfc->info.fdm_reg_size * eccsteps;
++	oob_region->length = mtd->oobsize - oob_region->offset;
++
++	return 0;
++}
++
++static const struct mtd_ooblayout_ops mtk_nfc_ooblayout_ops = {
++	.rfree = mtk_nfc_ooblayout_free,
++	.ecc = mtk_nfc_ooblayout_ecc,
++};
++
++struct nfc_compatible {
++	enum mtk_ic_version ic_ver;
++
++	u32 clock_1x;
++	u32 *clock_2x;
++	int clock_2x_num;
++
++	int min_oob_req;
++};
++
++static const struct nfc_compatible nfc_compats_mt7622 = {
++	.ic_ver = NANDX_MT7622,
++	.clock_1x = 26000000,
++	.clock_2x = NULL,
++	.clock_2x_num = 8,
++	.min_oob_req = 1,
++};
++
++static const struct udevice_id ic_of_match[] = {
++	{.compatible = "mediatek,mt7622-nfc", .data = &nfc_compats_mt7622},
++	{}
++};
++
++static int nand_operation(struct mtd_info *mtd, loff_t addr, size_t len,
++	      size_t *retlen, uint8_t *data, uint8_t *oob, bool read)
++{
++	struct nandx_split64 split = {0};
++	func_nandx_operation operation;
++	u64 block_oobs, val, align;
++	uint8_t *databuf, *oobbuf;
++	struct nandx_nfc *nfc;
++	bool readoob;
++	int ret = 0;
++
++	nfc = (struct nandx_nfc *)nand_get_controller_data;
++	spin_lock(&nfc->lock);
++
++	databuf = data;
++	oobbuf = oob;
++
++	readoob = data ? false : true;
++	block_oobs = div_up(mtd->erasesize, mtd->writesize) * mtd->oobavail;
++	align = readoob ? block_oobs : mtd->erasesize;
++
++	operation = read ? nandx_read : nandx_write;
++
++	nandx_split(&split, addr, len, val, align);
++
++	if (split.head_len) {
++		ret = operation((u8 *) databuf, oobbuf, addr, split.head_len);
++
++		if (databuf)
++			databuf += split.head_len;
++
++		if (oobbuf)
++			oobbuf += split.head_len;
++
++		addr += split.head_len;
++		*retlen += split.head_len;
++	}
++
++	if (split.body_len) {
++		while (div_up(split.body_len, align)) {
++			ret = operation((u8 *) databuf, oobbuf, addr, align);
++
++			if (databuf) {
++				databuf += mtd->erasesize;
++				split.body_len -= mtd->erasesize;
++				*retlen += mtd->erasesize;
++			}
++
++			if (oobbuf) {
++				oobbuf += block_oobs;
++				split.body_len -= block_oobs;
++				*retlen += block_oobs;
++			}
++
++			addr += mtd->erasesize;
++		}
++
++	}
++
++	if (split.tail_len) {
++		ret = operation((u8 *) databuf, oobbuf, addr, split.tail_len);
++		*retlen += split.tail_len;
++	}
++
++	spin_unlock(&nfc->lock);
++
++	return ret;
++}
++
++static int mtk_nand_read(struct mtd_info *mtd, loff_t from, size_t len,
++	      size_t *retlen, u_char *buf)
++{
++	return nand_operation(mtd, from, len, retlen, buf, NULL, true);
++}
++
++static int mtk_nand_write(struct mtd_info *mtd, loff_t to, size_t len,
++	       size_t *retlen, const u_char *buf)
++{
++	return nand_operation(mtd, to, len, retlen, (uint8_t *)buf,
++		NULL, false);
++}
++
++int mtk_nand_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops)
++{
++	size_t retlen;
++
++	return nand_operation(mtd, from, ops->ooblen, &retlen, NULL,
++		ops->oobbuf, true);
++}
++
++int mtk_nand_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops)
++{
++	size_t retlen;
++
++	return nand_operation(mtd, to, ops->ooblen, &retlen, NULL,
++		ops->oobbuf, false);
++}
++
++static int mtk_nand_erase(struct mtd_info *mtd, struct erase_info *instr)
++{
++	struct nandx_nfc *nfc;
++	u64 erase_len, erase_addr;
++	u32 block_size;
++	int ret = 0;
++
++	nfc = (struct nandx_nfc *)mtd_to_nfc(mtd);
++	block_size = nfc->info.block_size;
++	erase_len = instr->len;
++	erase_addr = instr->addr;
++	spin_lock(&nfc->lock);
++	instr->state = MTD_ERASING;
++
++	while (erase_len) {
++		if (mtk_nand_is_bad(mtd, erase_addr)) {
++			pr_info("block(0x%llx) is bad, not erase\n",
++				erase_addr);
++			instr->state = MTD_ERASE_FAILED;
++			goto erase_exit;
++		} else {
++			ret = nandx_erase(erase_addr, block_size);
++			if (ret < 0) {
++				instr->state = MTD_ERASE_FAILED;
++				goto erase_exit;
++				pr_info("erase fail at blk %llu, ret:%d\n",
++					erase_addr, ret);
++			}
++		}
++		erase_addr += block_size;
++		erase_len -= block_size;
++	}
++
++	instr->state = MTD_ERASE_DONE;
++
++erase_exit:
++	ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
++
++	spin_unlock(&nfc->lock);
++	/* Do mtd call back function */
++	if (!ret)
++		mtd_erase_callback(instr);
++
++	return ret;
++}
++
++int mtk_nand_is_bad(struct mtd_info *mtd, loff_t ofs)
++{
++	struct nandx_nfc *nfc;
++	int ret;
++
++	nfc = (struct nandx_nfc *)mtd_to_nfc(mtd);
++	spin_lock(&nfc->lock);
++
++	/*ret = bbt_is_bad(&nfc->info, ofs);*/
++	ret = nandx_is_bad_block(ofs);
++	spin_unlock(&nfc->lock);
++
++	if (ret) {
++		pr_info("nand block 0x%x is bad, ret %d!\n", ofs, ret);
++		return 1;
++	} else {
++		return 0;
++	}
++}
++
++int mtk_nand_mark_bad(struct mtd_info *mtd, loff_t ofs)
++{
++	struct nandx_nfc *nfc;
++	int ret;
++
++	nfc = (struct nandx_nfc *)mtd_to_nfc(mtd);
++	spin_lock(&nfc->lock);
++	pr_info("%s, %d\n", __func__, __LINE__);
++	ret = bbt_mark_bad(&nfc->info, ofs);
++
++	spin_unlock(&nfc->lock);
++
++	return ret;
++}
++
++void mtk_nand_sync(struct mtd_info *mtd)
++{
++	nandx_sync();
++}
++
++static struct mtd_info *mtd_info_create(struct udevice *pdev,
++		struct nandx_nfc *nfc, struct nand_chip *nand)
++{
++	struct mtd_info *mtd = nand_to_mtd(nand);
++	int ret;
++
++	nand_set_controller_data(nand, nfc);
++
++	nand->flash_node = dev_of_offset(pdev);
++	nand->ecc.layout = &eccoob;
++
++	ret = nandx_ioctl(CORE_CTRL_NAND_INFO, &nfc->info);
++	if (ret) {
++		pr_info("fail to get nand info (%d)!\n", ret);
++		mem_free(mtd);
++		return NULL;
++	}
++
++	mtd->owner = THIS_MODULE;
++
++	mtd->name = "MTK-SNand";
++	mtd->writesize = nfc->info.page_size;
++	mtd->erasesize = nfc->info.block_size;
++	mtd->oobsize = nfc->info.oob_size;
++	mtd->size = nfc->info.total_size;
++	mtd->type = MTD_NANDFLASH;
++	mtd->flags = MTD_CAP_NANDFLASH;
++	mtd->_erase = mtk_nand_erase;
++	mtd->_read = mtk_nand_read;
++	mtd->_write = mtk_nand_write;
++	mtd->_read_oob = mtk_nand_read_oob;
++	mtd->_write_oob = mtk_nand_write_oob;
++	mtd->_sync = mtk_nand_sync;
++	mtd->_lock = NULL;
++	mtd->_unlock = NULL;
++	mtd->_block_isbad = mtk_nand_is_bad;
++	mtd->_block_markbad = mtk_nand_mark_bad;
++	mtd->writebufsize = mtd->writesize;
++
++	mtd_set_ooblayout(mtd, &mtk_nfc_ooblayout_ops);
++
++	mtd->ecc_strength = nfc->info.ecc_strength;
++	mtd->ecc_step_size = nfc->info.sector_size;
++
++	if (!mtd->bitflip_threshold)
++		mtd->bitflip_threshold = mtd->ecc_strength;
++
++	return mtd;
++}
++
++int board_nand_init(struct nand_chip *nand)
++{
++	struct udevice *dev;
++	struct mtd_info *mtd;
++	struct nandx_nfc *nfc;
++	int arg = 1;
++	int ret;
++
++	ret = uclass_get_device_by_driver(UCLASS_MTD,
++					  DM_GET_DRIVER(mtk_snand_drv),
++					  &dev);
++	if (ret) {
++		pr_err("Failed to get mtk_nand_drv. (error %d)\n", ret);
++		return ret;
++	}
++
++	nfc = dev_get_priv(dev);
++
++	ret = nandx_enable_clk(&nfc->clk);
++	if (ret) {
++		pr_err("failed to enable nfi clk (error %d)\n", ret);
++		return ret;
++	}
++
++	ret = nandx_init(nfc->res);
++	if (ret) {
++		pr_err("nandx init error (%d)!\n", ret);
++		goto disable_clk;
++	}
++
++	arg = 1;
++	nandx_ioctl(NFI_CTRL_DMA, &arg);
++	nandx_ioctl(NFI_CTRL_ECC, &arg);
++
++#ifdef NANDX_UNIT_TEST
++	nandx_unit_test(0x780000, 0x800);
++#endif
++
++	mtd = mtd_info_create(dev, nfc, nand);
++	if (!mtd) {
++		ret = -ENOMEM;
++		goto disable_clk;
++	}
++
++	spin_lock_init(&nfc->lock);
++#if 0
++	ret = scan_bbt(&nfc->info);
++	if (ret) {
++		pr_info("bbt init error (%d)!\n", ret);
++		goto disable_clk;
++	}
++#endif
++	return ret;
++
++disable_clk:
++	nandx_disable_clk(&nfc->clk);
++
++	return ret;
++}
++
++static int mtk_snand_ofdata_to_platdata(struct udevice *dev)
++{
++	struct nandx_nfc *nfc = dev_get_priv(dev);
++	struct nfc_compatible *compat;
++	struct nfi_resource *res;
++
++	int ret = 0;
++
++	res = mem_alloc(1, sizeof(struct nfi_resource));
++	if (!res)
++		return -ENOMEM;
++
++	nfc->res = res;
++
++	res->nfi_regs = (void *)dev_read_addr_index(dev, 0);
++	res->ecc_regs = (void *)dev_read_addr_index(dev, 1);
++	pr_debug("mtk snand nfi_regs:0x%x ecc_regs:0x%x\n",
++		res->nfi_regs, res->ecc_regs);
++
++	compat = (struct nfc_compatible *)dev_get_driver_data(dev);
++
++	res->ic_ver = (enum mtk_ic_version)(compat->ic_ver);
++	res->clock_1x = compat->clock_1x;
++	res->clock_2x = compat->clock_2x;
++	res->clock_2x_num = compat->clock_2x_num;
++
++	memset(&nfc->clk, 0, sizeof(struct nandx_clk));
++	nfc->clk.nfi_clk =
++	    kmalloc(sizeof(*nfc->clk.nfi_clk), GFP_KERNEL);
++	nfc->clk.ecc_clk =
++	    kmalloc(sizeof(*nfc->clk.ecc_clk), GFP_KERNEL);
++	nfc->clk.snfi_clk=
++	    kmalloc(sizeof(*nfc->clk.snfi_clk), GFP_KERNEL);
++	nfc->clk.snfi_clk_sel =
++	    kmalloc(sizeof(*nfc->clk.snfi_clk_sel), GFP_KERNEL);
++	nfc->clk.snfi_parent_50m =
++	    kmalloc(sizeof(*nfc->clk.snfi_parent_50m), GFP_KERNEL);
++
++	if (!nfc->clk.nfi_clk || !nfc->clk.ecc_clk || !nfc->clk.snfi_clk ||
++		!nfc->clk.snfi_clk_sel || !nfc->clk.snfi_parent_50m) {
++		ret = -ENOMEM;
++		goto err;
++	}
++
++	ret = clk_get_by_name(dev, "nfi_clk", nfc->clk.nfi_clk);
++	if (IS_ERR(nfc->clk.nfi_clk)) {
++		ret = PTR_ERR(nfc->clk.nfi_clk);
++		goto err;
++	}
++
++	ret = clk_get_by_name(dev, "ecc_clk", nfc->clk.ecc_clk);
++	if (IS_ERR(nfc->clk.ecc_clk)) {
++		ret = PTR_ERR(nfc->clk.ecc_clk);
++		goto err;
++	}
++
++	ret = clk_get_by_name(dev, "snfi_clk", nfc->clk.snfi_clk);
++	if (IS_ERR(nfc->clk.snfi_clk)) {
++		ret = PTR_ERR(nfc->clk.snfi_clk);
++		goto err;
++	}
++
++	ret = clk_get_by_name(dev, "spinfi_sel", nfc->clk.snfi_clk_sel);
++	if (IS_ERR(nfc->clk.snfi_clk_sel)) {
++		ret = PTR_ERR(nfc->clk.snfi_clk_sel);
++		goto err;
++	}
++
++	ret = clk_get_by_name(dev, "spinfi_parent_50m", nfc->clk.snfi_parent_50m);
++	if (IS_ERR(nfc->clk.snfi_parent_50m))
++		pr_info("spinfi parent 50MHz is not configed\n");
++
++	return 0;
++err:
++	if (nfc->clk.nfi_clk)
++		kfree(nfc->clk.nfi_clk);
++	if (nfc->clk.snfi_clk)
++		kfree(nfc->clk.snfi_clk);
++	if (nfc->clk.ecc_clk)
++		kfree(nfc->clk.ecc_clk);
++	if (nfc->clk.snfi_clk_sel)
++		kfree(nfc->clk.snfi_clk_sel);
++	if (nfc->clk.snfi_parent_50m)
++		kfree(nfc->clk.snfi_parent_50m);
++
++	return ret;
++}
++
++U_BOOT_DRIVER(mtk_snand_drv) = {
++	.name = "mtk_snand",
++	.id = UCLASS_MTD,
++	.of_match = ic_of_match,
++	.ofdata_to_platdata = mtk_snand_ofdata_to_platdata,
++	.priv_auto_alloc_size = sizeof(struct nandx_nfc),
++};
++
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("MTK Nand Flash Controller Driver");
++MODULE_AUTHOR("MediaTek");
+diff --git a/drivers/mtd/nandx/include/Nandx.mk b/drivers/mtd/nandx/include/Nandx.mk
+new file mode 100644
+index 0000000000..667402790e
+--- /dev/null
++++ b/drivers/mtd/nandx/include/Nandx.mk
+@@ -0,0 +1,16 @@
++#
++# Copyright (C) 2017 MediaTek Inc.
++# Licensed under either
++#     BSD Licence, (see NOTICE for more details)
++#     GNU General Public License, version 2.0, (see NOTICE for more details)
++#
++
++nandx-header-y += internal/nandx_core.h
++nandx-header-y += internal/nandx_errno.h
++nandx-header-y += internal/nandx_util.h
++nandx-header-$(NANDX_BBT_SUPPORT) += internal/bbt.h
++nandx-header-$(NANDX_SIMULATOR_SUPPORT) += simulator/nandx_os.h
++nandx-header-$(NANDX_CTP_SUPPORT) += ctp/nandx_os.h
++nandx-header-$(NANDX_LK_SUPPORT) += lk/nandx_os.h
++nandx-header-$(NANDX_KERNEL_SUPPORT) += kernel/nandx_os.h
++nandx-header-$(NANDX_UBOOT_SUPPORT) += uboot/nandx_os.h
+diff --git a/drivers/mtd/nandx/include/internal/bbt.h b/drivers/mtd/nandx/include/internal/bbt.h
+new file mode 100644
+index 0000000000..4676def1f5
+--- /dev/null
++++ b/drivers/mtd/nandx/include/internal/bbt.h
+@@ -0,0 +1,62 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __BBT_H__
++#define __BBT_H__
++
++#define BBT_BLOCK_GOOD      0x03
++#define BBT_BLOCK_WORN      0x02
++#define BBT_BLOCK_RESERVED      0x01
++#define BBT_BLOCK_FACTORY_BAD   0x00
++
++#define BBT_INVALID_ADDR 0
++/* The maximum number of blocks to scan for a bbt */
++#define NAND_BBT_SCAN_MAXBLOCKS 4
++#define NAND_BBT_USE_FLASH  0x00020000
++#define NAND_BBT_NO_OOB     0x00040000
++
++/* Search good / bad pattern on the first and the second page */
++#define NAND_BBT_SCAN2NDPAGE    0x00008000
++/* Search good / bad pattern on the last page of the eraseblock */
++#define NAND_BBT_SCANLASTPAGE   0x00010000
++
++#define NAND_DRAM_BUF_DATABUF_ADDR  (NAND_BUF_ADDR)
++
++struct bbt_pattern {
++	u8 *data;
++	int len;
++};
++
++struct bbt_desc {
++	struct bbt_pattern pattern;
++	u8 version;
++	u64 bbt_addr;/*0: invalid value; otherwise, valid value*/
++};
++
++struct bbt_manager {
++	/* main bbt descriptor and mirror descriptor */
++	struct bbt_desc desc[2];/* 0: main bbt; 1: mirror bbt */
++	int max_blocks;
++	u8 *bbt;
++};
++
++#define BBT_ENTRY_MASK      0x03
++#define BBT_ENTRY_SHIFT     2
++
++#define GET_BBT_LENGTH(blocks) (blocks >> 2)
++#define GET_ENTRY(block) ((block) >> BBT_ENTRY_SHIFT)
++#define GET_POSITION(block) (((block) & BBT_ENTRY_MASK) * 2)
++#define GET_MARK_VALUE(block, mark) \
++	(((mark) & BBT_ENTRY_MASK) << GET_POSITION(block))
++
++int scan_bbt(struct nandx_info *nand);
++
++int bbt_mark_bad(struct nandx_info *nand, off_t offset);
++
++int bbt_is_bad(struct nandx_info *nand, off_t offset);
++
++#endif /*__BBT_H__*/
+diff --git a/drivers/mtd/nandx/include/internal/nandx_core.h b/drivers/mtd/nandx/include/internal/nandx_core.h
+new file mode 100644
+index 0000000000..09aff72224
+--- /dev/null
++++ b/drivers/mtd/nandx/include/internal/nandx_core.h
+@@ -0,0 +1,250 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NANDX_CORE_H__
++#define __NANDX_CORE_H__
++
++/**
++ * mtk_ic_version - indicates specifical IC, IP need this to load some info
++ */
++enum mtk_ic_version {
++	NANDX_MT7622,
++};
++
++/**
++ * nandx_ioctl_cmd - operations supported by nandx
++ *
++ * @NFI_CTRL_DMA dma enable or not
++ * @NFI_CTRL_NFI_MODE customer/read/program/erase...
++ * @NFI_CTRL_ECC ecc enable or not
++ * @NFI_CTRL_ECC_MODE nfi/dma/pio
++ * @CHIP_CTRL_DRIVE_STRENGTH enum chip_ctrl_drive_strength
++ */
++enum nandx_ctrl_cmd {
++	CORE_CTRL_NAND_INFO,
++
++	NFI_CTRL_DMA,
++	NFI_CTRL_NFI_MODE,
++	NFI_CTRL_AUTOFORMAT,
++	NFI_CTRL_NFI_IRQ,
++	NFI_CTRL_PAGE_IRQ,
++	NFI_CTRL_RANDOMIZE,
++	NFI_CTRL_BAD_MARK_SWAP,
++
++	NFI_CTRL_ECC,
++	NFI_CTRL_ECC_MODE,
++	NFI_CTRL_ECC_CLOCK,
++	NFI_CTRL_ECC_IRQ,
++	NFI_CTRL_ECC_PAGE_IRQ,
++	NFI_CTRL_ECC_DECODE_MODE,
++
++	SNFI_CTRL_OP_MODE,
++	SNFI_CTRL_RX_MODE,
++	SNFI_CTRL_TX_MODE,
++	SNFI_CTRL_DELAY_MODE,
++
++	CHIP_CTRL_OPS_CACHE,
++	CHIP_CTRL_OPS_MULTI,
++	CHIP_CTRL_PSLC_MODE,
++	CHIP_CTRL_DRIVE_STRENGTH,
++	CHIP_CTRL_DDR_MODE,
++	CHIP_CTRL_ONDIE_ECC,
++	CHIP_CTRL_TIMING_MODE
++};
++
++enum snfi_ctrl_op_mode {
++	SNFI_CUSTOM_MODE,
++	SNFI_AUTO_MODE,
++	SNFI_MAC_MODE
++};
++
++enum snfi_ctrl_rx_mode {
++	SNFI_RX_111,
++	SNFI_RX_112,
++	SNFI_RX_114,
++	SNFI_RX_122,
++	SNFI_RX_144
++};
++
++enum snfi_ctrl_tx_mode {
++	SNFI_TX_111,
++	SNFI_TX_114,
++};
++
++enum chip_ctrl_drive_strength {
++	CHIP_DRIVE_NORMAL,
++	CHIP_DRIVE_HIGH,
++	CHIP_DRIVE_MIDDLE,
++	CHIP_DRIVE_LOW
++};
++
++enum chip_ctrl_timing_mode {
++	CHIP_TIMING_MODE0,
++	CHIP_TIMING_MODE1,
++	CHIP_TIMING_MODE2,
++	CHIP_TIMING_MODE3,
++	CHIP_TIMING_MODE4,
++	CHIP_TIMING_MODE5,
++};
++
++/**
++ * nandx_info - basic information
++ */
++struct nandx_info {
++	u32 max_io_count;
++	u32 min_write_pages;
++	u32 plane_num;
++	u32 oob_size;
++	u32 page_parity_size;
++	u32 page_size;
++	u32 block_size;
++	u64 total_size;
++	u32 fdm_reg_size;
++	u32 fdm_ecc_size;
++	u32 ecc_strength;
++	u32 sector_size;
++};
++
++/**
++ * nfi_resource - the resource needed by nfi & ecc to do initialization
++ */
++struct nfi_resource {
++	int ic_ver;
++	void *dev;
++
++	void *ecc_regs;
++	int ecc_irq_id;
++
++	void *nfi_regs;
++	int nfi_irq_id;
++
++	u32 clock_1x;
++	u32 *clock_2x;
++	int clock_2x_num;
++
++	int min_oob_req;
++};
++
++/**
++ * nandx_init - init all related modules below
++ *
++ * @res: basic resource of the project
++ *
++ * return 0 if init success, otherwise return negative error code
++ */
++int nandx_init(struct nfi_resource *res);
++
++/**
++ * nandx_exit - release resource those that obtained in init flow
++ */
++void nandx_exit(void);
++
++/**
++ * nandx_read - read data from nand this function can read data and related
++ *   oob from specifical address
++ *   if do multi_ops, set one operation per time, and call nandx_sync at last
++ *   in multi mode, not support page partial read
++ *   oob not support partial read
++ *
++ * @data: buf to receive data from nand
++ * @oob: buf to receive oob data from nand which related to data page
++ *   length of @oob should oob size aligned, oob not support partial read
++ * @offset: offset address on the whole flash
++ * @len: the length of @data that need to read
++ *
++ * if read success return 0, otherwise return negative error code
++ */
++int nandx_read(u8 *data, u8 *oob, u64 offset, size_t len);
++
++/**
++ * nandx_write -  write data to nand
++ *   this function can write data and related oob to specifical address
++ *   if do multi_ops, set one operation per time, and call nandx_sync at last
++ *
++ * @data: source data to be written to nand,
++ *   for multi operation, the length of @data should be page size aliged
++ * @oob: source oob which related to data page to be written to nand,
++ *   length of @oob should oob size aligned
++ * @offset: offset address on the whole flash, the value should be start address
++ *   of a page
++ * @len: the length of @data that need to write,
++ *   for multi operation, the len should be page size aliged
++ *
++ * if write success return 0, otherwise return negative error code
++ * if return value > 0, it indicates that how many pages still need to write,
++ * and data has not been written to nand
++ * please call nandx_sync after pages alligned $nandx_info.min_write_pages
++ */
++int nandx_write(u8 *data, u8 *oob, u64 offset, size_t len);
++
++/**
++ * nandx_erase - erase an area of nand
++ *   if do multi_ops, set one operation per time, and call nandx_sync at last
++ *
++ * @offset: offset address on the flash
++ * @len: erase length which should be block size aligned
++ *
++ * if erase success return 0, otherwise return negative error code
++ */
++int nandx_erase(u64 offset, size_t len);
++
++/**
++ * nandx_sync - sync all operations to nand
++ *   when do multi_ops, this function will be called at last operation
++ *   when write data, if number of pages not alligned
++ *   by $nandx_info.min_write_pages, this interface could be called to do
++ *   force write, 0xff will be padded to blanked pages.
++ */
++int nandx_sync(void);
++
++/**
++ * nandx_is_bad_block - check if the block is bad
++ *   only check the flag that marked by the flash vendor
++ *
++ * @offset: offset address on the whole flash
++ *
++ * return true if the block is bad, otherwise return false
++ */
++bool nandx_is_bad_block(u64 offset);
++
++/**
++ * nandx_ioctl - set/get property of nand chip
++ *
++ * @cmd: parameter that defined in enum nandx_ioctl_cmd
++ * @arg: operate parameter
++ *
++ * return 0 if operate success, otherwise return negative error code
++ */
++int nandx_ioctl(int cmd, void *arg);
++
++/**
++ * nandx_suspend - suspend nand, and store some data
++ *
++ * return 0 if suspend success, otherwise return negative error code
++ */
++int nandx_suspend(void);
++
++/**
++ * nandx_resume - resume nand, and replay some data
++ *
++ * return 0 if resume success, otherwise return negative error code
++ */
++int nandx_resume(void);
++
++#ifdef NANDX_UNIT_TEST
++/**
++ * nandx_unit_test - unit test
++ *
++ * @offset: offset address on the whole flash
++ * @len: should be not larger than a block size, we only test a block per time
++ *
++ * return 0 if test success, otherwise return negative error code
++ */
++int nandx_unit_test(u64 offset, size_t len);
++#endif
++
++#endif /* __NANDX_CORE_H__ */
+diff --git a/drivers/mtd/nandx/include/internal/nandx_errno.h b/drivers/mtd/nandx/include/internal/nandx_errno.h
+new file mode 100644
+index 0000000000..51fb299c03
+--- /dev/null
++++ b/drivers/mtd/nandx/include/internal/nandx_errno.h
+@@ -0,0 +1,40 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NANDX_ERRNO_H__
++#define __NANDX_ERRNO_H__
++
++#ifndef EIO
++#define EIO             5       /* I/O error */
++#define ENOMEM          12      /* Out of memory */
++#define EFAULT          14      /* Bad address */
++#define EBUSY           16      /* Device or resource busy */
++#define ENODEV          19      /* No such device */
++#define EINVAL          22      /* Invalid argument */
++#define ENOSPC          28      /* No space left on device */
++/* Operation not supported on transport endpoint */
++#define EOPNOTSUPP      95
++#define ETIMEDOUT       110     /* Connection timed out */
++#endif
++
++#define ENANDFLIPS      1024    /* Too many bitflips, uncorrected */
++#define ENANDREAD       1025    /* Read fail, can't correct */
++#define ENANDWRITE      1026    /* Write fail */
++#define ENANDERASE      1027    /* Erase fail */
++#define ENANDBAD        1028    /* Bad block */
++#define ENANDWP         1029
++
++#define IS_NAND_ERR(err)        ((err) >= -ENANDBAD && (err) <= -ENANDFLIPS)
++
++#ifndef MAX_ERRNO
++#define MAX_ERRNO       4096
++#define ERR_PTR(errno)  ((void *)((long)errno))
++#define PTR_ERR(ptr)    ((long)(ptr))
++#define IS_ERR(ptr)     ((unsigned long)(ptr) > (unsigned long)-MAX_ERRNO)
++#endif
++
++#endif /* __NANDX_ERRNO_H__ */
+diff --git a/drivers/mtd/nandx/include/internal/nandx_util.h b/drivers/mtd/nandx/include/internal/nandx_util.h
+new file mode 100644
+index 0000000000..1990b000ee
+--- /dev/null
++++ b/drivers/mtd/nandx/include/internal/nandx_util.h
+@@ -0,0 +1,221 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NANDX_UTIL_H__
++#define __NANDX_UTIL_H__
++
++typedef unsigned char u8;
++typedef unsigned short u16;
++typedef unsigned int u32;
++typedef unsigned long long u64;
++
++enum nand_irq_return {
++	NAND_IRQ_NONE,
++	NAND_IRQ_HANDLED,
++};
++
++enum nand_dma_operation {
++	NDMA_FROM_DEV,
++	NDMA_TO_DEV,
++};
++
++
++/*
++ * Compatible function
++ * used for preloader/lk/kernel environment
++ */
++#include "nandx_os.h"
++#include "nandx_errno.h"
++
++#ifndef BIT
++#define BIT(a)                  (1 << (a))
++#endif
++
++#ifndef min_t
++#define min_t(type, x, y) ({                    \
++	type __min1 = (x);                      \
++	type __min2 = (y);                      \
++	__min1 < __min2 ? __min1 : __min2; })
++
++#define max_t(type, x, y) ({                    \
++	type __max1 = (x);                      \
++	type __max2 = (y);                      \
++	__max1 > __max2 ? __max1 : __max2; })
++#endif
++
++#ifndef GENMASK
++#define GENMASK(h, l) \
++	(((~0UL) << (l)) & (~0UL >> ((sizeof(unsigned long) * 8) - 1 - (h))))
++#endif
++
++#ifndef __weak
++#define __weak __attribute__((__weak__))
++#endif
++
++#ifndef __packed
++#define __packed __attribute__((__packed__))
++#endif
++
++#ifndef KB
++#define KB(x)   ((x) << 10)
++#define MB(x)   (KB(x) << 10)
++#define GB(x)   (MB(x) << 10)
++#endif
++
++#ifndef offsetof
++#define offsetof(type, member) ((size_t)&((type *)0)->member)
++#endif
++
++#ifndef NULL
++#define NULL (void *)0
++#endif
++static inline u32 nandx_popcount(u32 x)
++{
++	x = (x & 0x55555555) + ((x >> 1) & 0x55555555);
++	x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
++	x = (x & 0x0F0F0F0F) + ((x >> 4) & 0x0F0F0F0F);
++	x = (x & 0x00FF00FF) + ((x >> 8) & 0x00FF00FF);
++	x = (x & 0x0000FFFF) + ((x >> 16) & 0x0000FFFF);
++
++	return x;
++}
++
++#ifndef zero_popcount
++#define zero_popcount(x) (32 - nandx_popcount(x))
++#endif
++
++#ifndef do_div
++#define do_div(n, base) \
++	({ \
++		u32 __base = (base); \
++		u32 __rem; \
++		__rem = ((u64)(n)) % __base; \
++		(n) = ((u64)(n)) / __base; \
++		__rem; \
++	})
++#endif
++
++#define div_up(x, y) \
++	({ \
++		u64 __temp = ((x) + (y) - 1); \
++		do_div(__temp, (y)); \
++		__temp; \
++	})
++
++#define div_down(x, y) \
++	({ \
++		u64 __temp = (x); \
++		do_div(__temp, (y)); \
++		__temp; \
++	})
++
++#define div_round_up(x, y)      (div_up(x, y) * (y))
++#define div_round_down(x, y)    (div_down(x, y) * (y))
++
++#define reminder(x, y) \
++	({ \
++		u64 __temp = (x); \
++		do_div(__temp, (y)); \
++	})
++
++#ifndef round_up
++#define round_up(x, y)          ((((x) - 1) | ((y) - 1)) + 1)
++#define round_down(x, y)        ((x) & ~((y) - 1))
++#endif
++
++#ifndef readx_poll_timeout_atomic
++#define readx_poll_timeout_atomic(op, addr, val, cond, delay_us, timeout_us) \
++	({ \
++		u64 end = get_current_time_us() + timeout_us; \
++		for (;;) { \
++			u64 now = get_current_time_us(); \
++			(val) = op(addr); \
++			if (cond) \
++				break; \
++			if (now > end) { \
++				(val) = op(addr); \
++				break; \
++			} \
++		} \
++		(cond) ? 0 : -ETIMEDOUT; \
++	})
++
++#define readl_poll_timeout_atomic(addr, val, cond, delay_us, timeout_us) \
++	readx_poll_timeout_atomic(readl, addr, val, cond, delay_us, timeout_us)
++#define readw_poll_timeout_atomic(addr, val, cond, delay_us, timeout_us) \
++	readx_poll_timeout_atomic(readw, addr, val, cond, delay_us, timeout_us)
++#define readb_poll_timeout_atomic(addr, val, cond, delay_us, timeout_us) \
++	readx_poll_timeout_atomic(readb, addr, val, cond, delay_us, timeout_us)
++#endif
++
++struct nandx_split64 {
++	u64 head;
++	size_t head_len;
++	u64 body;
++	size_t body_len;
++	u64 tail;
++	size_t tail_len;
++};
++
++struct nandx_split32 {
++	u32 head;
++	u32 head_len;
++	u32 body;
++	u32 body_len;
++	u32 tail;
++	u32 tail_len;
++};
++
++#define nandx_split(split, offset, len, val, align) \
++	do { \
++		(split)->head = (offset); \
++		(val) = div_round_down((offset), (align)); \
++		(val) = (align) - ((offset) - (val)); \
++		if ((val) == (align)) \
++			(split)->head_len = 0; \
++		else if ((val) > (len)) \
++			(split)->head_len = len; \
++		else \
++			(split)->head_len = val; \
++		(split)->body = (offset) + (split)->head_len; \
++		(split)->body_len = div_round_down((len) - \
++						   (split)->head_len,\
++						   (align)); \
++		(split)->tail = (split)->body + (split)->body_len; \
++		(split)->tail_len = (len) - (split)->head_len - \
++				    (split)->body_len; \
++	} while (0)
++
++#ifndef container_of
++#define container_of(ptr, type, member) \
++	({const __typeof__(((type *)0)->member) * __mptr = (ptr); \
++		(type *)((char *)__mptr - offsetof(type, member)); })
++#endif
++
++static inline u32 nandx_cpu_to_be32(u32 val)
++{
++	u32 temp = 1;
++	u8 *p_temp = (u8 *)&temp;
++
++	if (*p_temp)
++		return ((val & 0xff) << 24) | ((val & 0xff00) << 8) |
++		       ((val >> 8) & 0xff00) | ((val >> 24) & 0xff);
++
++	return val;
++}
++
++static inline void nandx_set_bits32(unsigned long addr, u32 mask,
++				    u32 val)
++{
++	u32 temp = readl((void *)addr);
++
++	temp &= ~(mask);
++	temp |= val;
++	writel(temp, (void *)addr);
++}
++
++#endif /* __NANDX_UTIL_H__ */
+diff --git a/drivers/mtd/nandx/include/uboot/nandx_os.h b/drivers/mtd/nandx/include/uboot/nandx_os.h
+new file mode 100644
+index 0000000000..8ea53378bf
+--- /dev/null
++++ b/drivers/mtd/nandx/include/uboot/nandx_os.h
+@@ -0,0 +1,78 @@
++/*
++ * Copyright (C) 2017 MediaTek Inc.
++ * Licensed under either
++ *     BSD Licence, (see NOTICE for more details)
++ *     GNU General Public License, version 2.0, (see NOTICE for more details)
++ */
++
++#ifndef __NANDX_OS_H__
++#define __NANDX_OS_H__
++
++#include <common.h>
++#include <dm.h>
++#include <clk.h>
++#include <asm/dma-mapping.h>
++#include <linux/io.h>
++#include <linux/err.h>
++#include <linux/errno.h>
++#include <linux/bitops.h>
++#include <linux/kernel.h>
++#include <linux/compiler-gcc.h>
++
++#define NANDX_BULK_IO_USE_DRAM 0
++
++#define nandx_event_create()     NULL
++#define nandx_event_destroy(event)
++#define nandx_event_complete(event)
++#define nandx_event_init(event)
++#define nandx_event_wait_complete(event, timeout)        true
++
++#define nandx_irq_register(dev, irq, irq_handler, name, data)	NULL
++
++static inline void *mem_alloc(u32 count, u32 size)
++{
++	return kmalloc(count * size, GFP_KERNEL | __GFP_ZERO);
++}
++
++static inline void mem_free(void *mem)
++{
++	kfree(mem);
++}
++
++static inline u64 get_current_time_us(void)
++{
++	return timer_get_us();
++}
++
++static inline u32 nandx_dma_map(void *dev, void *buf, u64 len,
++				enum nand_dma_operation op)
++{
++	unsigned long addr = (unsigned long)buf;
++	u64 size;
++
++	size = ALIGN(len, ARCH_DMA_MINALIGN);
++
++	if (op == NDMA_FROM_DEV)
++		invalidate_dcache_range(addr, addr + size);
++	else
++		flush_dcache_range(addr, addr + size);
++
++	return addr;
++}
++
++static inline void nandx_dma_unmap(void *dev, void *buf, void *addr,
++				   u64 len, enum nand_dma_operation op)
++{
++	u64 size;
++
++	size = ALIGN(len, ARCH_DMA_MINALIGN);
++
++	if (op != NDMA_FROM_DEV)
++		invalidate_dcache_range((unsigned long)addr, addr + size);
++	else
++		flush_dcache_range((unsigned long)addr, addr + size);
++
++	return addr;
++}
++
++#endif /* __NANDX_OS_H__ */
+diff --git a/include/configs/mt7622.h b/include/configs/mt7622.h
+index dfd506ed24..6d0c956484 100644
+--- a/include/configs/mt7622.h
++++ b/include/configs/mt7622.h
+@@ -11,6 +11,31 @@
+ 
+ #include <linux/sizes.h>
+ 
++/* SPI Nand */
++#if defined(CONFIG_MTD_RAW_NAND)
++#define CONFIG_SYS_MAX_NAND_DEVICE 1
++#define CONFIG_SYS_NAND_BASE		0x1100d000
++
++#define ENV_BOOT_READ_IMAGE \
++	"boot_rd_img=" \
++	"nand read 0x4007ff28 0x380000 0x1400000" \
++	";iminfo 0x4007ff28 \0"
++
++#define ENV_BOOT_WRITE_IMAGE \
++	"boot_wr_img=" \
++	"nand write 0x4007ff28 0x380000 0x1400000" \
++	";iminfo 0x4007ff28 \0"
++
++#define ENV_BOOT_CMD \
++	"mtk_boot=run boot_rd_img;bootm;\0"
++
++#define CONFIG_EXTRA_ENV_SETTINGS \
++	ENV_BOOT_READ_IMAGE \
++	ENV_BOOT_CMD \
++	"bootcmd=run mtk_boot;\0"
++
++#endif
++
+ #define CONFIG_SYS_MAXARGS		8
+ #define CONFIG_SYS_BOOTM_LEN		SZ_64M
+ #define CONFIG_SYS_CBSIZE		SZ_1K
+-- 
+2.17.1
+