--- /dev/null
+From ebb9653d4a87c64fb679e4c339e867556dada719 Mon Sep 17 00:00:00 2001
+From: Chuanhong Guo <gch981213@gmail.com>
+Date: Tue, 22 Mar 2022 18:44:21 +0800
+Subject: [PATCH 11/15] mtd: nand: make mtk_ecc.c a separated module
+
+this code will be used in mediatek snfi spi-mem controller with
+pipelined ECC engine.
+
+Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
+(cherry picked from commit 316f47cec4ce5b81aa8006de202d8769c117a52d)
+---
+ drivers/mtd/nand/Kconfig | 7 +++++++
+ drivers/mtd/nand/Makefile | 1 +
+ drivers/mtd/nand/{raw/mtk_ecc.c => ecc-mtk.c} | 3 +--
+ drivers/mtd/nand/raw/Kconfig | 1 +
+ drivers/mtd/nand/raw/Makefile | 2 +-
+ drivers/mtd/nand/raw/mtk_nand.c | 2 +-
+ .../nand/raw/mtk_ecc.h => include/linux/mtd/nand-ecc-mtk.h | 0
+ 7 files changed, 12 insertions(+), 4 deletions(-)
+ rename drivers/mtd/nand/{raw/mtk_ecc.c => ecc-mtk.c} (99%)
+ rename drivers/mtd/nand/raw/mtk_ecc.h => include/linux/mtd/nand-ecc-mtk.h (100%)
+
+--- a/drivers/mtd/nand/Kconfig
++++ b/drivers/mtd/nand/Kconfig
+@@ -50,6 +50,13 @@ config MTD_NAND_MTK_BMT
+ bool "Support MediaTek NAND Bad-block Management Table"
+ default n
+
++config MTD_NAND_ECC_MEDIATEK
++ tristate "Mediatek hardware ECC engine"
++ depends on HAS_IOMEM
++ select MTD_NAND_ECC
++ help
++ This enables support for the hardware ECC engine from Mediatek.
++
+ endmenu
+
+ endmenu
+--- a/drivers/mtd/nand/Makefile
++++ b/drivers/mtd/nand/Makefile
+@@ -3,6 +3,7 @@
+ nandcore-objs := core.o bbt.o
+ obj-$(CONFIG_MTD_NAND_CORE) += nandcore.o
+ obj-$(CONFIG_MTD_NAND_MTK_BMT) += mtk_bmt.o mtk_bmt_v2.o mtk_bmt_bbt.o mtk_bmt_nmbm.o
++obj-$(CONFIG_MTD_NAND_ECC_MEDIATEK) += ecc-mtk.o
+
+ obj-y += onenand/
+ obj-y += raw/
+--- a/drivers/mtd/nand/raw/mtk_ecc.c
++++ /dev/null
+@@ -1,599 +0,0 @@
+-// SPDX-License-Identifier: GPL-2.0 OR MIT
+-/*
+- * MTK ECC controller driver.
+- * Copyright (C) 2016 MediaTek Inc.
+- * Authors: Xiaolei Li <xiaolei.li@mediatek.com>
+- * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+- */
+-
+-#include <linux/platform_device.h>
+-#include <linux/dma-mapping.h>
+-#include <linux/interrupt.h>
+-#include <linux/clk.h>
+-#include <linux/module.h>
+-#include <linux/iopoll.h>
+-#include <linux/of.h>
+-#include <linux/of_platform.h>
+-#include <linux/mutex.h>
+-
+-#include "mtk_ecc.h"
+-
+-#define ECC_IDLE_MASK BIT(0)
+-#define ECC_IRQ_EN BIT(0)
+-#define ECC_PG_IRQ_SEL BIT(1)
+-#define ECC_OP_ENABLE (1)
+-#define ECC_OP_DISABLE (0)
+-
+-#define ECC_ENCCON (0x00)
+-#define ECC_ENCCNFG (0x04)
+-#define ECC_MS_SHIFT (16)
+-#define ECC_ENCDIADDR (0x08)
+-#define ECC_ENCIDLE (0x0C)
+-#define ECC_DECCON (0x100)
+-#define ECC_DECCNFG (0x104)
+-#define DEC_EMPTY_EN BIT(31)
+-#define DEC_CNFG_CORRECT (0x3 << 12)
+-#define ECC_DECIDLE (0x10C)
+-#define ECC_DECENUM0 (0x114)
+-
+-#define ECC_TIMEOUT (500000)
+-
+-#define ECC_IDLE_REG(op) ((op) == ECC_ENCODE ? ECC_ENCIDLE : ECC_DECIDLE)
+-#define ECC_CTL_REG(op) ((op) == ECC_ENCODE ? ECC_ENCCON : ECC_DECCON)
+-
+-struct mtk_ecc_caps {
+- u32 err_mask;
+- u32 err_shift;
+- const u8 *ecc_strength;
+- const u32 *ecc_regs;
+- u8 num_ecc_strength;
+- u8 ecc_mode_shift;
+- u32 parity_bits;
+- int pg_irq_sel;
+-};
+-
+-struct mtk_ecc {
+- struct device *dev;
+- const struct mtk_ecc_caps *caps;
+- void __iomem *regs;
+- struct clk *clk;
+-
+- struct completion done;
+- struct mutex lock;
+- u32 sectors;
+-
+- u8 *eccdata;
+-};
+-
+-/* ecc strength that each IP supports */
+-static const u8 ecc_strength_mt2701[] = {
+- 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36,
+- 40, 44, 48, 52, 56, 60
+-};
+-
+-static const u8 ecc_strength_mt2712[] = {
+- 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36,
+- 40, 44, 48, 52, 56, 60, 68, 72, 80
+-};
+-
+-static const u8 ecc_strength_mt7622[] = {
+- 4, 6, 8, 10, 12
+-};
+-
+-enum mtk_ecc_regs {
+- ECC_ENCPAR00,
+- ECC_ENCIRQ_EN,
+- ECC_ENCIRQ_STA,
+- ECC_DECDONE,
+- ECC_DECIRQ_EN,
+- ECC_DECIRQ_STA,
+-};
+-
+-static int mt2701_ecc_regs[] = {
+- [ECC_ENCPAR00] = 0x10,
+- [ECC_ENCIRQ_EN] = 0x80,
+- [ECC_ENCIRQ_STA] = 0x84,
+- [ECC_DECDONE] = 0x124,
+- [ECC_DECIRQ_EN] = 0x200,
+- [ECC_DECIRQ_STA] = 0x204,
+-};
+-
+-static int mt2712_ecc_regs[] = {
+- [ECC_ENCPAR00] = 0x300,
+- [ECC_ENCIRQ_EN] = 0x80,
+- [ECC_ENCIRQ_STA] = 0x84,
+- [ECC_DECDONE] = 0x124,
+- [ECC_DECIRQ_EN] = 0x200,
+- [ECC_DECIRQ_STA] = 0x204,
+-};
+-
+-static int mt7622_ecc_regs[] = {
+- [ECC_ENCPAR00] = 0x10,
+- [ECC_ENCIRQ_EN] = 0x30,
+- [ECC_ENCIRQ_STA] = 0x34,
+- [ECC_DECDONE] = 0x11c,
+- [ECC_DECIRQ_EN] = 0x140,
+- [ECC_DECIRQ_STA] = 0x144,
+-};
+-
+-static inline void mtk_ecc_wait_idle(struct mtk_ecc *ecc,
+- enum mtk_ecc_operation op)
+-{
+- struct device *dev = ecc->dev;
+- u32 val;
+- int ret;
+-
+- ret = readl_poll_timeout_atomic(ecc->regs + ECC_IDLE_REG(op), val,
+- val & ECC_IDLE_MASK,
+- 10, ECC_TIMEOUT);
+- if (ret)
+- dev_warn(dev, "%s NOT idle\n",
+- op == ECC_ENCODE ? "encoder" : "decoder");
+-}
+-
+-static irqreturn_t mtk_ecc_irq(int irq, void *id)
+-{
+- struct mtk_ecc *ecc = id;
+- u32 dec, enc;
+-
+- dec = readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_STA])
+- & ECC_IRQ_EN;
+- if (dec) {
+- dec = readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECDONE]);
+- if (dec & ecc->sectors) {
+- /*
+- * Clear decode IRQ status once again to ensure that
+- * there will be no extra IRQ.
+- */
+- readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_STA]);
+- ecc->sectors = 0;
+- complete(&ecc->done);
+- } else {
+- return IRQ_HANDLED;
+- }
+- } else {
+- enc = readl(ecc->regs + ecc->caps->ecc_regs[ECC_ENCIRQ_STA])
+- & ECC_IRQ_EN;
+- if (enc)
+- complete(&ecc->done);
+- else
+- return IRQ_NONE;
+- }
+-
+- return IRQ_HANDLED;
+-}
+-
+-static int mtk_ecc_config(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
+-{
+- u32 ecc_bit, dec_sz, enc_sz;
+- u32 reg, i;
+-
+- for (i = 0; i < ecc->caps->num_ecc_strength; i++) {
+- if (ecc->caps->ecc_strength[i] == config->strength)
+- break;
+- }
+-
+- if (i == ecc->caps->num_ecc_strength) {
+- dev_err(ecc->dev, "invalid ecc strength %d\n",
+- config->strength);
+- return -EINVAL;
+- }
+-
+- ecc_bit = i;
+-
+- if (config->op == ECC_ENCODE) {
+- /* configure ECC encoder (in bits) */
+- enc_sz = config->len << 3;
+-
+- reg = ecc_bit | (config->mode << ecc->caps->ecc_mode_shift);
+- reg |= (enc_sz << ECC_MS_SHIFT);
+- writel(reg, ecc->regs + ECC_ENCCNFG);
+-
+- if (config->mode != ECC_NFI_MODE)
+- writel(lower_32_bits(config->addr),
+- ecc->regs + ECC_ENCDIADDR);
+-
+- } else {
+- /* configure ECC decoder (in bits) */
+- dec_sz = (config->len << 3) +
+- config->strength * ecc->caps->parity_bits;
+-
+- reg = ecc_bit | (config->mode << ecc->caps->ecc_mode_shift);
+- reg |= (dec_sz << ECC_MS_SHIFT) | DEC_CNFG_CORRECT;
+- reg |= DEC_EMPTY_EN;
+- writel(reg, ecc->regs + ECC_DECCNFG);
+-
+- if (config->sectors)
+- ecc->sectors = 1 << (config->sectors - 1);
+- }
+-
+- return 0;
+-}
+-
+-void mtk_ecc_get_stats(struct mtk_ecc *ecc, struct mtk_ecc_stats *stats,
+- int sectors)
+-{
+- u32 offset, i, err;
+- u32 bitflips = 0;
+-
+- stats->corrected = 0;
+- stats->failed = 0;
+-
+- for (i = 0; i < sectors; i++) {
+- offset = (i >> 2) << 2;
+- err = readl(ecc->regs + ECC_DECENUM0 + offset);
+- err = err >> ((i % 4) * ecc->caps->err_shift);
+- err &= ecc->caps->err_mask;
+- if (err == ecc->caps->err_mask) {
+- /* uncorrectable errors */
+- stats->failed++;
+- continue;
+- }
+-
+- stats->corrected += err;
+- bitflips = max_t(u32, bitflips, err);
+- }
+-
+- stats->bitflips = bitflips;
+-}
+-EXPORT_SYMBOL(mtk_ecc_get_stats);
+-
+-void mtk_ecc_release(struct mtk_ecc *ecc)
+-{
+- clk_disable_unprepare(ecc->clk);
+- put_device(ecc->dev);
+-}
+-EXPORT_SYMBOL(mtk_ecc_release);
+-
+-static void mtk_ecc_hw_init(struct mtk_ecc *ecc)
+-{
+- mtk_ecc_wait_idle(ecc, ECC_ENCODE);
+- writew(ECC_OP_DISABLE, ecc->regs + ECC_ENCCON);
+-
+- mtk_ecc_wait_idle(ecc, ECC_DECODE);
+- writel(ECC_OP_DISABLE, ecc->regs + ECC_DECCON);
+-}
+-
+-static struct mtk_ecc *mtk_ecc_get(struct device_node *np)
+-{
+- struct platform_device *pdev;
+- struct mtk_ecc *ecc;
+-
+- pdev = of_find_device_by_node(np);
+- if (!pdev)
+- return ERR_PTR(-EPROBE_DEFER);
+-
+- ecc = platform_get_drvdata(pdev);
+- if (!ecc) {
+- put_device(&pdev->dev);
+- return ERR_PTR(-EPROBE_DEFER);
+- }
+-
+- clk_prepare_enable(ecc->clk);
+- mtk_ecc_hw_init(ecc);
+-
+- return ecc;
+-}
+-
+-struct mtk_ecc *of_mtk_ecc_get(struct device_node *of_node)
+-{
+- struct mtk_ecc *ecc = NULL;
+- struct device_node *np;
+-
+- np = of_parse_phandle(of_node, "ecc-engine", 0);
+- if (np) {
+- ecc = mtk_ecc_get(np);
+- of_node_put(np);
+- }
+-
+- return ecc;
+-}
+-EXPORT_SYMBOL(of_mtk_ecc_get);
+-
+-int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
+-{
+- enum mtk_ecc_operation op = config->op;
+- u16 reg_val;
+- int ret;
+-
+- ret = mutex_lock_interruptible(&ecc->lock);
+- if (ret) {
+- dev_err(ecc->dev, "interrupted when attempting to lock\n");
+- return ret;
+- }
+-
+- mtk_ecc_wait_idle(ecc, op);
+-
+- ret = mtk_ecc_config(ecc, config);
+- if (ret) {
+- mutex_unlock(&ecc->lock);
+- return ret;
+- }
+-
+- if (config->mode != ECC_NFI_MODE || op != ECC_ENCODE) {
+- init_completion(&ecc->done);
+- reg_val = ECC_IRQ_EN;
+- /*
+- * For ECC_NFI_MODE, if ecc->caps->pg_irq_sel is 1, then it
+- * means this chip can only generate one ecc irq during page
+- * read / write. If is 0, generate one ecc irq each ecc step.
+- */
+- if (ecc->caps->pg_irq_sel && config->mode == ECC_NFI_MODE)
+- reg_val |= ECC_PG_IRQ_SEL;
+- if (op == ECC_ENCODE)
+- writew(reg_val, ecc->regs +
+- ecc->caps->ecc_regs[ECC_ENCIRQ_EN]);
+- else
+- writew(reg_val, ecc->regs +
+- ecc->caps->ecc_regs[ECC_DECIRQ_EN]);
+- }
+-
+- writew(ECC_OP_ENABLE, ecc->regs + ECC_CTL_REG(op));
+-
+- return 0;
+-}
+-EXPORT_SYMBOL(mtk_ecc_enable);
+-
+-void mtk_ecc_disable(struct mtk_ecc *ecc)
+-{
+- enum mtk_ecc_operation op = ECC_ENCODE;
+-
+- /* find out the running operation */
+- if (readw(ecc->regs + ECC_CTL_REG(op)) != ECC_OP_ENABLE)
+- op = ECC_DECODE;
+-
+- /* disable it */
+- mtk_ecc_wait_idle(ecc, op);
+- if (op == ECC_DECODE) {
+- /*
+- * Clear decode IRQ status in case there is a timeout to wait
+- * decode IRQ.
+- */
+- readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECDONE]);
+- writew(0, ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_EN]);
+- } else {
+- writew(0, ecc->regs + ecc->caps->ecc_regs[ECC_ENCIRQ_EN]);
+- }
+-
+- writew(ECC_OP_DISABLE, ecc->regs + ECC_CTL_REG(op));
+-
+- mutex_unlock(&ecc->lock);
+-}
+-EXPORT_SYMBOL(mtk_ecc_disable);
+-
+-int mtk_ecc_wait_done(struct mtk_ecc *ecc, enum mtk_ecc_operation op)
+-{
+- int ret;
+-
+- ret = wait_for_completion_timeout(&ecc->done, msecs_to_jiffies(500));
+- if (!ret) {
+- dev_err(ecc->dev, "%s timeout - interrupt did not arrive)\n",
+- (op == ECC_ENCODE) ? "encoder" : "decoder");
+- return -ETIMEDOUT;
+- }
+-
+- return 0;
+-}
+-EXPORT_SYMBOL(mtk_ecc_wait_done);
+-
+-int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config,
+- u8 *data, u32 bytes)
+-{
+- dma_addr_t addr;
+- u32 len;
+- int ret;
+-
+- addr = dma_map_single(ecc->dev, data, bytes, DMA_TO_DEVICE);
+- ret = dma_mapping_error(ecc->dev, addr);
+- if (ret) {
+- dev_err(ecc->dev, "dma mapping error\n");
+- return -EINVAL;
+- }
+-
+- config->op = ECC_ENCODE;
+- config->addr = addr;
+- ret = mtk_ecc_enable(ecc, config);
+- if (ret) {
+- dma_unmap_single(ecc->dev, addr, bytes, DMA_TO_DEVICE);
+- return ret;
+- }
+-
+- ret = mtk_ecc_wait_done(ecc, ECC_ENCODE);
+- if (ret)
+- goto timeout;
+-
+- mtk_ecc_wait_idle(ecc, ECC_ENCODE);
+-
+- /* Program ECC bytes to OOB: per sector oob = FDM + ECC + SPARE */
+- len = (config->strength * ecc->caps->parity_bits + 7) >> 3;
+-
+- /* write the parity bytes generated by the ECC back to temp buffer */
+- __ioread32_copy(ecc->eccdata,
+- ecc->regs + ecc->caps->ecc_regs[ECC_ENCPAR00],
+- round_up(len, 4));
+-
+- /* copy into possibly unaligned OOB region with actual length */
+- memcpy(data + bytes, ecc->eccdata, len);
+-timeout:
+-
+- dma_unmap_single(ecc->dev, addr, bytes, DMA_TO_DEVICE);
+- mtk_ecc_disable(ecc);
+-
+- return ret;
+-}
+-EXPORT_SYMBOL(mtk_ecc_encode);
+-
+-void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p)
+-{
+- const u8 *ecc_strength = ecc->caps->ecc_strength;
+- int i;
+-
+- for (i = 0; i < ecc->caps->num_ecc_strength; i++) {
+- if (*p <= ecc_strength[i]) {
+- if (!i)
+- *p = ecc_strength[i];
+- else if (*p != ecc_strength[i])
+- *p = ecc_strength[i - 1];
+- return;
+- }
+- }
+-
+- *p = ecc_strength[ecc->caps->num_ecc_strength - 1];
+-}
+-EXPORT_SYMBOL(mtk_ecc_adjust_strength);
+-
+-unsigned int mtk_ecc_get_parity_bits(struct mtk_ecc *ecc)
+-{
+- return ecc->caps->parity_bits;
+-}
+-EXPORT_SYMBOL(mtk_ecc_get_parity_bits);
+-
+-static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = {
+- .err_mask = 0x3f,
+- .err_shift = 8,
+- .ecc_strength = ecc_strength_mt2701,
+- .ecc_regs = mt2701_ecc_regs,
+- .num_ecc_strength = 20,
+- .ecc_mode_shift = 5,
+- .parity_bits = 14,
+- .pg_irq_sel = 0,
+-};
+-
+-static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = {
+- .err_mask = 0x7f,
+- .err_shift = 8,
+- .ecc_strength = ecc_strength_mt2712,
+- .ecc_regs = mt2712_ecc_regs,
+- .num_ecc_strength = 23,
+- .ecc_mode_shift = 5,
+- .parity_bits = 14,
+- .pg_irq_sel = 1,
+-};
+-
+-static const struct mtk_ecc_caps mtk_ecc_caps_mt7622 = {
+- .err_mask = 0x1f,
+- .err_shift = 5,
+- .ecc_strength = ecc_strength_mt7622,
+- .ecc_regs = mt7622_ecc_regs,
+- .num_ecc_strength = 5,
+- .ecc_mode_shift = 4,
+- .parity_bits = 13,
+- .pg_irq_sel = 0,
+-};
+-
+-static const struct of_device_id mtk_ecc_dt_match[] = {
+- {
+- .compatible = "mediatek,mt2701-ecc",
+- .data = &mtk_ecc_caps_mt2701,
+- }, {
+- .compatible = "mediatek,mt2712-ecc",
+- .data = &mtk_ecc_caps_mt2712,
+- }, {
+- .compatible = "mediatek,mt7622-ecc",
+- .data = &mtk_ecc_caps_mt7622,
+- },
+- {},
+-};
+-
+-static int mtk_ecc_probe(struct platform_device *pdev)
+-{
+- struct device *dev = &pdev->dev;
+- struct mtk_ecc *ecc;
+- struct resource *res;
+- u32 max_eccdata_size;
+- int irq, ret;
+-
+- ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
+- if (!ecc)
+- return -ENOMEM;
+-
+- ecc->caps = of_device_get_match_data(dev);
+-
+- max_eccdata_size = ecc->caps->num_ecc_strength - 1;
+- max_eccdata_size = ecc->caps->ecc_strength[max_eccdata_size];
+- max_eccdata_size = (max_eccdata_size * ecc->caps->parity_bits + 7) >> 3;
+- max_eccdata_size = round_up(max_eccdata_size, 4);
+- ecc->eccdata = devm_kzalloc(dev, max_eccdata_size, GFP_KERNEL);
+- if (!ecc->eccdata)
+- return -ENOMEM;
+-
+- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+- ecc->regs = devm_ioremap_resource(dev, res);
+- if (IS_ERR(ecc->regs))
+- return PTR_ERR(ecc->regs);
+-
+- ecc->clk = devm_clk_get(dev, NULL);
+- if (IS_ERR(ecc->clk)) {
+- dev_err(dev, "failed to get clock: %ld\n", PTR_ERR(ecc->clk));
+- return PTR_ERR(ecc->clk);
+- }
+-
+- irq = platform_get_irq(pdev, 0);
+- if (irq < 0)
+- return irq;
+-
+- ret = dma_set_mask(dev, DMA_BIT_MASK(32));
+- if (ret) {
+- dev_err(dev, "failed to set DMA mask\n");
+- return ret;
+- }
+-
+- ret = devm_request_irq(dev, irq, mtk_ecc_irq, 0x0, "mtk-ecc", ecc);
+- if (ret) {
+- dev_err(dev, "failed to request irq\n");
+- return -EINVAL;
+- }
+-
+- ecc->dev = dev;
+- mutex_init(&ecc->lock);
+- platform_set_drvdata(pdev, ecc);
+- dev_info(dev, "probed\n");
+-
+- return 0;
+-}
+-
+-#ifdef CONFIG_PM_SLEEP
+-static int mtk_ecc_suspend(struct device *dev)
+-{
+- struct mtk_ecc *ecc = dev_get_drvdata(dev);
+-
+- clk_disable_unprepare(ecc->clk);
+-
+- return 0;
+-}
+-
+-static int mtk_ecc_resume(struct device *dev)
+-{
+- struct mtk_ecc *ecc = dev_get_drvdata(dev);
+- int ret;
+-
+- ret = clk_prepare_enable(ecc->clk);
+- if (ret) {
+- dev_err(dev, "failed to enable clk\n");
+- return ret;
+- }
+-
+- return 0;
+-}
+-
+-static SIMPLE_DEV_PM_OPS(mtk_ecc_pm_ops, mtk_ecc_suspend, mtk_ecc_resume);
+-#endif
+-
+-MODULE_DEVICE_TABLE(of, mtk_ecc_dt_match);
+-
+-static struct platform_driver mtk_ecc_driver = {
+- .probe = mtk_ecc_probe,
+- .driver = {
+- .name = "mtk-ecc",
+- .of_match_table = of_match_ptr(mtk_ecc_dt_match),
+-#ifdef CONFIG_PM_SLEEP
+- .pm = &mtk_ecc_pm_ops,
+-#endif
+- },
+-};
+-
+-module_platform_driver(mtk_ecc_driver);
+-
+-MODULE_AUTHOR("Xiaolei Li <xiaolei.li@mediatek.com>");
+-MODULE_DESCRIPTION("MTK Nand ECC Driver");
+-MODULE_LICENSE("Dual MIT/GPL");
+--- /dev/null
++++ b/drivers/mtd/nand/ecc-mtk.c
+@@ -0,0 +1,598 @@
++// SPDX-License-Identifier: GPL-2.0 OR MIT
++/*
++ * MTK ECC controller driver.
++ * Copyright (C) 2016 MediaTek Inc.
++ * Authors: Xiaolei Li <xiaolei.li@mediatek.com>
++ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
++ */
++
++#include <linux/platform_device.h>
++#include <linux/dma-mapping.h>
++#include <linux/interrupt.h>
++#include <linux/clk.h>
++#include <linux/module.h>
++#include <linux/iopoll.h>
++#include <linux/of.h>
++#include <linux/of_platform.h>
++#include <linux/mutex.h>
++#include <linux/mtd/nand-ecc-mtk.h>
++
++#define ECC_IDLE_MASK BIT(0)
++#define ECC_IRQ_EN BIT(0)
++#define ECC_PG_IRQ_SEL BIT(1)
++#define ECC_OP_ENABLE (1)
++#define ECC_OP_DISABLE (0)
++
++#define ECC_ENCCON (0x00)
++#define ECC_ENCCNFG (0x04)
++#define ECC_MS_SHIFT (16)
++#define ECC_ENCDIADDR (0x08)
++#define ECC_ENCIDLE (0x0C)
++#define ECC_DECCON (0x100)
++#define ECC_DECCNFG (0x104)
++#define DEC_EMPTY_EN BIT(31)
++#define DEC_CNFG_CORRECT (0x3 << 12)
++#define ECC_DECIDLE (0x10C)
++#define ECC_DECENUM0 (0x114)
++
++#define ECC_TIMEOUT (500000)
++
++#define ECC_IDLE_REG(op) ((op) == ECC_ENCODE ? ECC_ENCIDLE : ECC_DECIDLE)
++#define ECC_CTL_REG(op) ((op) == ECC_ENCODE ? ECC_ENCCON : ECC_DECCON)
++
++struct mtk_ecc_caps {
++ u32 err_mask;
++ u32 err_shift;
++ const u8 *ecc_strength;
++ const u32 *ecc_regs;
++ u8 num_ecc_strength;
++ u8 ecc_mode_shift;
++ u32 parity_bits;
++ int pg_irq_sel;
++};
++
++struct mtk_ecc {
++ struct device *dev;
++ const struct mtk_ecc_caps *caps;
++ void __iomem *regs;
++ struct clk *clk;
++
++ struct completion done;
++ struct mutex lock;
++ u32 sectors;
++
++ u8 *eccdata;
++};
++
++/* ecc strength that each IP supports */
++static const u8 ecc_strength_mt2701[] = {
++ 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36,
++ 40, 44, 48, 52, 56, 60
++};
++
++static const u8 ecc_strength_mt2712[] = {
++ 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36,
++ 40, 44, 48, 52, 56, 60, 68, 72, 80
++};
++
++static const u8 ecc_strength_mt7622[] = {
++ 4, 6, 8, 10, 12
++};
++
++enum mtk_ecc_regs {
++ ECC_ENCPAR00,
++ ECC_ENCIRQ_EN,
++ ECC_ENCIRQ_STA,
++ ECC_DECDONE,
++ ECC_DECIRQ_EN,
++ ECC_DECIRQ_STA,
++};
++
++static int mt2701_ecc_regs[] = {
++ [ECC_ENCPAR00] = 0x10,
++ [ECC_ENCIRQ_EN] = 0x80,
++ [ECC_ENCIRQ_STA] = 0x84,
++ [ECC_DECDONE] = 0x124,
++ [ECC_DECIRQ_EN] = 0x200,
++ [ECC_DECIRQ_STA] = 0x204,
++};
++
++static int mt2712_ecc_regs[] = {
++ [ECC_ENCPAR00] = 0x300,
++ [ECC_ENCIRQ_EN] = 0x80,
++ [ECC_ENCIRQ_STA] = 0x84,
++ [ECC_DECDONE] = 0x124,
++ [ECC_DECIRQ_EN] = 0x200,
++ [ECC_DECIRQ_STA] = 0x204,
++};
++
++static int mt7622_ecc_regs[] = {
++ [ECC_ENCPAR00] = 0x10,
++ [ECC_ENCIRQ_EN] = 0x30,
++ [ECC_ENCIRQ_STA] = 0x34,
++ [ECC_DECDONE] = 0x11c,
++ [ECC_DECIRQ_EN] = 0x140,
++ [ECC_DECIRQ_STA] = 0x144,
++};
++
++static inline void mtk_ecc_wait_idle(struct mtk_ecc *ecc,
++ enum mtk_ecc_operation op)
++{
++ struct device *dev = ecc->dev;
++ u32 val;
++ int ret;
++
++ ret = readl_poll_timeout_atomic(ecc->regs + ECC_IDLE_REG(op), val,
++ val & ECC_IDLE_MASK,
++ 10, ECC_TIMEOUT);
++ if (ret)
++ dev_warn(dev, "%s NOT idle\n",
++ op == ECC_ENCODE ? "encoder" : "decoder");
++}
++
++static irqreturn_t mtk_ecc_irq(int irq, void *id)
++{
++ struct mtk_ecc *ecc = id;
++ u32 dec, enc;
++
++ dec = readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_STA])
++ & ECC_IRQ_EN;
++ if (dec) {
++ dec = readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECDONE]);
++ if (dec & ecc->sectors) {
++ /*
++ * Clear decode IRQ status once again to ensure that
++ * there will be no extra IRQ.
++ */
++ readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_STA]);
++ ecc->sectors = 0;
++ complete(&ecc->done);
++ } else {
++ return IRQ_HANDLED;
++ }
++ } else {
++ enc = readl(ecc->regs + ecc->caps->ecc_regs[ECC_ENCIRQ_STA])
++ & ECC_IRQ_EN;
++ if (enc)
++ complete(&ecc->done);
++ else
++ return IRQ_NONE;
++ }
++
++ return IRQ_HANDLED;
++}
++
++static int mtk_ecc_config(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
++{
++ u32 ecc_bit, dec_sz, enc_sz;
++ u32 reg, i;
++
++ for (i = 0; i < ecc->caps->num_ecc_strength; i++) {
++ if (ecc->caps->ecc_strength[i] == config->strength)
++ break;
++ }
++
++ if (i == ecc->caps->num_ecc_strength) {
++ dev_err(ecc->dev, "invalid ecc strength %d\n",
++ config->strength);
++ return -EINVAL;
++ }
++
++ ecc_bit = i;
++
++ if (config->op == ECC_ENCODE) {
++ /* configure ECC encoder (in bits) */
++ enc_sz = config->len << 3;
++
++ reg = ecc_bit | (config->mode << ecc->caps->ecc_mode_shift);
++ reg |= (enc_sz << ECC_MS_SHIFT);
++ writel(reg, ecc->regs + ECC_ENCCNFG);
++
++ if (config->mode != ECC_NFI_MODE)
++ writel(lower_32_bits(config->addr),
++ ecc->regs + ECC_ENCDIADDR);
++
++ } else {
++ /* configure ECC decoder (in bits) */
++ dec_sz = (config->len << 3) +
++ config->strength * ecc->caps->parity_bits;
++
++ reg = ecc_bit | (config->mode << ecc->caps->ecc_mode_shift);
++ reg |= (dec_sz << ECC_MS_SHIFT) | DEC_CNFG_CORRECT;
++ reg |= DEC_EMPTY_EN;
++ writel(reg, ecc->regs + ECC_DECCNFG);
++
++ if (config->sectors)
++ ecc->sectors = 1 << (config->sectors - 1);
++ }
++
++ return 0;
++}
++
++void mtk_ecc_get_stats(struct mtk_ecc *ecc, struct mtk_ecc_stats *stats,
++ int sectors)
++{
++ u32 offset, i, err;
++ u32 bitflips = 0;
++
++ stats->corrected = 0;
++ stats->failed = 0;
++
++ for (i = 0; i < sectors; i++) {
++ offset = (i >> 2) << 2;
++ err = readl(ecc->regs + ECC_DECENUM0 + offset);
++ err = err >> ((i % 4) * ecc->caps->err_shift);
++ err &= ecc->caps->err_mask;
++ if (err == ecc->caps->err_mask) {
++ /* uncorrectable errors */
++ stats->failed++;
++ continue;
++ }
++
++ stats->corrected += err;
++ bitflips = max_t(u32, bitflips, err);
++ }
++
++ stats->bitflips = bitflips;
++}
++EXPORT_SYMBOL(mtk_ecc_get_stats);
++
++void mtk_ecc_release(struct mtk_ecc *ecc)
++{
++ clk_disable_unprepare(ecc->clk);
++ put_device(ecc->dev);
++}
++EXPORT_SYMBOL(mtk_ecc_release);
++
++static void mtk_ecc_hw_init(struct mtk_ecc *ecc)
++{
++ mtk_ecc_wait_idle(ecc, ECC_ENCODE);
++ writew(ECC_OP_DISABLE, ecc->regs + ECC_ENCCON);
++
++ mtk_ecc_wait_idle(ecc, ECC_DECODE);
++ writel(ECC_OP_DISABLE, ecc->regs + ECC_DECCON);
++}
++
++static struct mtk_ecc *mtk_ecc_get(struct device_node *np)
++{
++ struct platform_device *pdev;
++ struct mtk_ecc *ecc;
++
++ pdev = of_find_device_by_node(np);
++ if (!pdev)
++ return ERR_PTR(-EPROBE_DEFER);
++
++ ecc = platform_get_drvdata(pdev);
++ if (!ecc) {
++ put_device(&pdev->dev);
++ return ERR_PTR(-EPROBE_DEFER);
++ }
++
++ clk_prepare_enable(ecc->clk);
++ mtk_ecc_hw_init(ecc);
++
++ return ecc;
++}
++
++struct mtk_ecc *of_mtk_ecc_get(struct device_node *of_node)
++{
++ struct mtk_ecc *ecc = NULL;
++ struct device_node *np;
++
++ np = of_parse_phandle(of_node, "ecc-engine", 0);
++ if (np) {
++ ecc = mtk_ecc_get(np);
++ of_node_put(np);
++ }
++
++ return ecc;
++}
++EXPORT_SYMBOL(of_mtk_ecc_get);
++
++int mtk_ecc_enable(struct mtk_ecc *ecc, struct mtk_ecc_config *config)
++{
++ enum mtk_ecc_operation op = config->op;
++ u16 reg_val;
++ int ret;
++
++ ret = mutex_lock_interruptible(&ecc->lock);
++ if (ret) {
++ dev_err(ecc->dev, "interrupted when attempting to lock\n");
++ return ret;
++ }
++
++ mtk_ecc_wait_idle(ecc, op);
++
++ ret = mtk_ecc_config(ecc, config);
++ if (ret) {
++ mutex_unlock(&ecc->lock);
++ return ret;
++ }
++
++ if (config->mode != ECC_NFI_MODE || op != ECC_ENCODE) {
++ init_completion(&ecc->done);
++ reg_val = ECC_IRQ_EN;
++ /*
++ * For ECC_NFI_MODE, if ecc->caps->pg_irq_sel is 1, then it
++ * means this chip can only generate one ecc irq during page
++ * read / write. If is 0, generate one ecc irq each ecc step.
++ */
++ if (ecc->caps->pg_irq_sel && config->mode == ECC_NFI_MODE)
++ reg_val |= ECC_PG_IRQ_SEL;
++ if (op == ECC_ENCODE)
++ writew(reg_val, ecc->regs +
++ ecc->caps->ecc_regs[ECC_ENCIRQ_EN]);
++ else
++ writew(reg_val, ecc->regs +
++ ecc->caps->ecc_regs[ECC_DECIRQ_EN]);
++ }
++
++ writew(ECC_OP_ENABLE, ecc->regs + ECC_CTL_REG(op));
++
++ return 0;
++}
++EXPORT_SYMBOL(mtk_ecc_enable);
++
++void mtk_ecc_disable(struct mtk_ecc *ecc)
++{
++ enum mtk_ecc_operation op = ECC_ENCODE;
++
++ /* find out the running operation */
++ if (readw(ecc->regs + ECC_CTL_REG(op)) != ECC_OP_ENABLE)
++ op = ECC_DECODE;
++
++ /* disable it */
++ mtk_ecc_wait_idle(ecc, op);
++ if (op == ECC_DECODE) {
++ /*
++ * Clear decode IRQ status in case there is a timeout to wait
++ * decode IRQ.
++ */
++ readw(ecc->regs + ecc->caps->ecc_regs[ECC_DECDONE]);
++ writew(0, ecc->regs + ecc->caps->ecc_regs[ECC_DECIRQ_EN]);
++ } else {
++ writew(0, ecc->regs + ecc->caps->ecc_regs[ECC_ENCIRQ_EN]);
++ }
++
++ writew(ECC_OP_DISABLE, ecc->regs + ECC_CTL_REG(op));
++
++ mutex_unlock(&ecc->lock);
++}
++EXPORT_SYMBOL(mtk_ecc_disable);
++
++int mtk_ecc_wait_done(struct mtk_ecc *ecc, enum mtk_ecc_operation op)
++{
++ int ret;
++
++ ret = wait_for_completion_timeout(&ecc->done, msecs_to_jiffies(500));
++ if (!ret) {
++ dev_err(ecc->dev, "%s timeout - interrupt did not arrive)\n",
++ (op == ECC_ENCODE) ? "encoder" : "decoder");
++ return -ETIMEDOUT;
++ }
++
++ return 0;
++}
++EXPORT_SYMBOL(mtk_ecc_wait_done);
++
++int mtk_ecc_encode(struct mtk_ecc *ecc, struct mtk_ecc_config *config,
++ u8 *data, u32 bytes)
++{
++ dma_addr_t addr;
++ u32 len;
++ int ret;
++
++ addr = dma_map_single(ecc->dev, data, bytes, DMA_TO_DEVICE);
++ ret = dma_mapping_error(ecc->dev, addr);
++ if (ret) {
++ dev_err(ecc->dev, "dma mapping error\n");
++ return -EINVAL;
++ }
++
++ config->op = ECC_ENCODE;
++ config->addr = addr;
++ ret = mtk_ecc_enable(ecc, config);
++ if (ret) {
++ dma_unmap_single(ecc->dev, addr, bytes, DMA_TO_DEVICE);
++ return ret;
++ }
++
++ ret = mtk_ecc_wait_done(ecc, ECC_ENCODE);
++ if (ret)
++ goto timeout;
++
++ mtk_ecc_wait_idle(ecc, ECC_ENCODE);
++
++ /* Program ECC bytes to OOB: per sector oob = FDM + ECC + SPARE */
++ len = (config->strength * ecc->caps->parity_bits + 7) >> 3;
++
++ /* write the parity bytes generated by the ECC back to temp buffer */
++ __ioread32_copy(ecc->eccdata,
++ ecc->regs + ecc->caps->ecc_regs[ECC_ENCPAR00],
++ round_up(len, 4));
++
++ /* copy into possibly unaligned OOB region with actual length */
++ memcpy(data + bytes, ecc->eccdata, len);
++timeout:
++
++ dma_unmap_single(ecc->dev, addr, bytes, DMA_TO_DEVICE);
++ mtk_ecc_disable(ecc);
++
++ return ret;
++}
++EXPORT_SYMBOL(mtk_ecc_encode);
++
++void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p)
++{
++ const u8 *ecc_strength = ecc->caps->ecc_strength;
++ int i;
++
++ for (i = 0; i < ecc->caps->num_ecc_strength; i++) {
++ if (*p <= ecc_strength[i]) {
++ if (!i)
++ *p = ecc_strength[i];
++ else if (*p != ecc_strength[i])
++ *p = ecc_strength[i - 1];
++ return;
++ }
++ }
++
++ *p = ecc_strength[ecc->caps->num_ecc_strength - 1];
++}
++EXPORT_SYMBOL(mtk_ecc_adjust_strength);
++
++unsigned int mtk_ecc_get_parity_bits(struct mtk_ecc *ecc)
++{
++ return ecc->caps->parity_bits;
++}
++EXPORT_SYMBOL(mtk_ecc_get_parity_bits);
++
++static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = {
++ .err_mask = 0x3f,
++ .err_shift = 8,
++ .ecc_strength = ecc_strength_mt2701,
++ .ecc_regs = mt2701_ecc_regs,
++ .num_ecc_strength = 20,
++ .ecc_mode_shift = 5,
++ .parity_bits = 14,
++ .pg_irq_sel = 0,
++};
++
++static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = {
++ .err_mask = 0x7f,
++ .err_shift = 8,
++ .ecc_strength = ecc_strength_mt2712,
++ .ecc_regs = mt2712_ecc_regs,
++ .num_ecc_strength = 23,
++ .ecc_mode_shift = 5,
++ .parity_bits = 14,
++ .pg_irq_sel = 1,
++};
++
++static const struct mtk_ecc_caps mtk_ecc_caps_mt7622 = {
++ .err_mask = 0x1f,
++ .err_shift = 5,
++ .ecc_strength = ecc_strength_mt7622,
++ .ecc_regs = mt7622_ecc_regs,
++ .num_ecc_strength = 5,
++ .ecc_mode_shift = 4,
++ .parity_bits = 13,
++ .pg_irq_sel = 0,
++};
++
++static const struct of_device_id mtk_ecc_dt_match[] = {
++ {
++ .compatible = "mediatek,mt2701-ecc",
++ .data = &mtk_ecc_caps_mt2701,
++ }, {
++ .compatible = "mediatek,mt2712-ecc",
++ .data = &mtk_ecc_caps_mt2712,
++ }, {
++ .compatible = "mediatek,mt7622-ecc",
++ .data = &mtk_ecc_caps_mt7622,
++ },
++ {},
++};
++
++static int mtk_ecc_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct mtk_ecc *ecc;
++ struct resource *res;
++ u32 max_eccdata_size;
++ int irq, ret;
++
++ ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL);
++ if (!ecc)
++ return -ENOMEM;
++
++ ecc->caps = of_device_get_match_data(dev);
++
++ max_eccdata_size = ecc->caps->num_ecc_strength - 1;
++ max_eccdata_size = ecc->caps->ecc_strength[max_eccdata_size];
++ max_eccdata_size = (max_eccdata_size * ecc->caps->parity_bits + 7) >> 3;
++ max_eccdata_size = round_up(max_eccdata_size, 4);
++ ecc->eccdata = devm_kzalloc(dev, max_eccdata_size, GFP_KERNEL);
++ if (!ecc->eccdata)
++ return -ENOMEM;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ ecc->regs = devm_ioremap_resource(dev, res);
++ if (IS_ERR(ecc->regs))
++ return PTR_ERR(ecc->regs);
++
++ ecc->clk = devm_clk_get(dev, NULL);
++ if (IS_ERR(ecc->clk)) {
++ dev_err(dev, "failed to get clock: %ld\n", PTR_ERR(ecc->clk));
++ return PTR_ERR(ecc->clk);
++ }
++
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0)
++ return irq;
++
++ ret = dma_set_mask(dev, DMA_BIT_MASK(32));
++ if (ret) {
++ dev_err(dev, "failed to set DMA mask\n");
++ return ret;
++ }
++
++ ret = devm_request_irq(dev, irq, mtk_ecc_irq, 0x0, "mtk-ecc", ecc);
++ if (ret) {
++ dev_err(dev, "failed to request irq\n");
++ return -EINVAL;
++ }
++
++ ecc->dev = dev;
++ mutex_init(&ecc->lock);
++ platform_set_drvdata(pdev, ecc);
++ dev_info(dev, "probed\n");
++
++ return 0;
++}
++
++#ifdef CONFIG_PM_SLEEP
++static int mtk_ecc_suspend(struct device *dev)
++{
++ struct mtk_ecc *ecc = dev_get_drvdata(dev);
++
++ clk_disable_unprepare(ecc->clk);
++
++ return 0;
++}
++
++static int mtk_ecc_resume(struct device *dev)
++{
++ struct mtk_ecc *ecc = dev_get_drvdata(dev);
++ int ret;
++
++ ret = clk_prepare_enable(ecc->clk);
++ if (ret) {
++ dev_err(dev, "failed to enable clk\n");
++ return ret;
++ }
++
++ return 0;
++}
++
++static SIMPLE_DEV_PM_OPS(mtk_ecc_pm_ops, mtk_ecc_suspend, mtk_ecc_resume);
++#endif
++
++MODULE_DEVICE_TABLE(of, mtk_ecc_dt_match);
++
++static struct platform_driver mtk_ecc_driver = {
++ .probe = mtk_ecc_probe,
++ .driver = {
++ .name = "mtk-ecc",
++ .of_match_table = of_match_ptr(mtk_ecc_dt_match),
++#ifdef CONFIG_PM_SLEEP
++ .pm = &mtk_ecc_pm_ops,
++#endif
++ },
++};
++
++module_platform_driver(mtk_ecc_driver);
++
++MODULE_AUTHOR("Xiaolei Li <xiaolei.li@mediatek.com>");
++MODULE_DESCRIPTION("MTK Nand ECC Driver");
++MODULE_LICENSE("Dual MIT/GPL");
+--- a/drivers/mtd/nand/raw/Kconfig
++++ b/drivers/mtd/nand/raw/Kconfig
+@@ -360,6 +360,7 @@ config MTD_NAND_QCOM
+
+ config MTD_NAND_MTK
+ tristate "MTK NAND controller"
++ depends on MTD_NAND_ECC_MEDIATEK
+ depends on ARCH_MEDIATEK || COMPILE_TEST
+ depends on HAS_IOMEM
+ help
+--- a/drivers/mtd/nand/raw/Makefile
++++ b/drivers/mtd/nand/raw/Makefile
+@@ -48,7 +48,7 @@ obj-$(CONFIG_MTD_NAND_SUNXI) += sunxi_n
+ obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o
+ obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/
+ obj-$(CONFIG_MTD_NAND_QCOM) += qcom_nandc.o
+-obj-$(CONFIG_MTD_NAND_MTK) += mtk_ecc.o mtk_nand.o
++obj-$(CONFIG_MTD_NAND_MTK) += mtk_nand.o
+ obj-$(CONFIG_MTD_NAND_MXIC) += mxic_nand.o
+ obj-$(CONFIG_MTD_NAND_TEGRA) += tegra_nand.o
+ obj-$(CONFIG_MTD_NAND_STM32_FMC2) += stm32_fmc2_nand.o
+--- a/drivers/mtd/nand/raw/mtk_nand.c
++++ b/drivers/mtd/nand/raw/mtk_nand.c
+@@ -17,7 +17,7 @@
+ #include <linux/iopoll.h>
+ #include <linux/of.h>
+ #include <linux/of_device.h>
+-#include "mtk_ecc.h"
++#include <linux/mtd/nand-ecc-mtk.h>
+
+ /* NAND controller register definition */
+ #define NFI_CNFG (0x00)
+--- a/drivers/mtd/nand/raw/mtk_ecc.h
++++ /dev/null
+@@ -1,47 +0,0 @@
+-/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+-/*
+- * MTK SDG1 ECC controller
+- *
+- * Copyright (c) 2016 Mediatek
+- * Authors: Xiaolei Li <xiaolei.li@mediatek.com>
+- * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
+- */
+-
+-#ifndef __DRIVERS_MTD_NAND_MTK_ECC_H__
+-#define __DRIVERS_MTD_NAND_MTK_ECC_H__
+-
+-#include <linux/types.h>
+-
+-enum mtk_ecc_mode {ECC_DMA_MODE = 0, ECC_NFI_MODE = 1};
+-enum mtk_ecc_operation {ECC_ENCODE, ECC_DECODE};
+-
+-struct device_node;
+-struct mtk_ecc;
+-
+-struct mtk_ecc_stats {
+- u32 corrected;
+- u32 bitflips;
+- u32 failed;
+-};
+-
+-struct mtk_ecc_config {
+- enum mtk_ecc_operation op;
+- enum mtk_ecc_mode mode;
+- dma_addr_t addr;
+- u32 strength;
+- u32 sectors;
+- u32 len;
+-};
+-
+-int mtk_ecc_encode(struct mtk_ecc *, struct mtk_ecc_config *, u8 *, u32);
+-void mtk_ecc_get_stats(struct mtk_ecc *, struct mtk_ecc_stats *, int);
+-int mtk_ecc_wait_done(struct mtk_ecc *, enum mtk_ecc_operation);
+-int mtk_ecc_enable(struct mtk_ecc *, struct mtk_ecc_config *);
+-void mtk_ecc_disable(struct mtk_ecc *);
+-void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p);
+-unsigned int mtk_ecc_get_parity_bits(struct mtk_ecc *ecc);
+-
+-struct mtk_ecc *of_mtk_ecc_get(struct device_node *);
+-void mtk_ecc_release(struct mtk_ecc *);
+-
+-#endif
+--- /dev/null
++++ b/include/linux/mtd/nand-ecc-mtk.h
+@@ -0,0 +1,47 @@
++/* SPDX-License-Identifier: GPL-2.0 OR MIT */
++/*
++ * MTK SDG1 ECC controller
++ *
++ * Copyright (c) 2016 Mediatek
++ * Authors: Xiaolei Li <xiaolei.li@mediatek.com>
++ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
++ */
++
++#ifndef __DRIVERS_MTD_NAND_MTK_ECC_H__
++#define __DRIVERS_MTD_NAND_MTK_ECC_H__
++
++#include <linux/types.h>
++
++enum mtk_ecc_mode {ECC_DMA_MODE = 0, ECC_NFI_MODE = 1};
++enum mtk_ecc_operation {ECC_ENCODE, ECC_DECODE};
++
++struct device_node;
++struct mtk_ecc;
++
++struct mtk_ecc_stats {
++ u32 corrected;
++ u32 bitflips;
++ u32 failed;
++};
++
++struct mtk_ecc_config {
++ enum mtk_ecc_operation op;
++ enum mtk_ecc_mode mode;
++ dma_addr_t addr;
++ u32 strength;
++ u32 sectors;
++ u32 len;
++};
++
++int mtk_ecc_encode(struct mtk_ecc *, struct mtk_ecc_config *, u8 *, u32);
++void mtk_ecc_get_stats(struct mtk_ecc *, struct mtk_ecc_stats *, int);
++int mtk_ecc_wait_done(struct mtk_ecc *, enum mtk_ecc_operation);
++int mtk_ecc_enable(struct mtk_ecc *, struct mtk_ecc_config *);
++void mtk_ecc_disable(struct mtk_ecc *);
++void mtk_ecc_adjust_strength(struct mtk_ecc *ecc, u32 *p);
++unsigned int mtk_ecc_get_parity_bits(struct mtk_ecc *ecc);
++
++struct mtk_ecc *of_mtk_ecc_get(struct device_node *);
++void mtk_ecc_release(struct mtk_ecc *);
++
++#endif
projects / openwrt / staging / chunkeey.git / blobdiff