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author | Luka Perkov <luka.perkov@sartura.hr> | 2016-06-23 13:57:21 +0200 |
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committer | GitHub <noreply@github.com> | 2016-06-23 13:57:21 +0200 |
commit | 282b917e47d9ae5017e1e426face9b75cb7aabd0 (patch) | |
tree | 3284ca2d20d9c8d7a4563c6446675c1ecf3feac2 /target/linux/mediatek/patches-4.4/0075-mtd-mediatek-driver-for-MTK-Smart-Device-Gen1-NAND.patch | |
parent | 34d432b05312de6d9575c559db8209809489096d (diff) | |
parent | 441a9c879ba6562ea9f431cf33bbb0c0400d5fd0 (diff) | |
download | master-187ad058-282b917e47d9ae5017e1e426face9b75cb7aabd0.tar.gz master-187ad058-282b917e47d9ae5017e1e426face9b75cb7aabd0.tar.bz2 master-187ad058-282b917e47d9ae5017e1e426face9b75cb7aabd0.zip |
Merge pull request #11 from wigyori/master
pull req for 4.4.12, ar71xx/mediatek updates, package upgrades
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0075-mtd-mediatek-driver-for-MTK-Smart-Device-Gen1-NAND.patch')
-rw-r--r-- | target/linux/mediatek/patches-4.4/0075-mtd-mediatek-driver-for-MTK-Smart-Device-Gen1-NAND.patch | 2064 |
1 files changed, 2064 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.4/0075-mtd-mediatek-driver-for-MTK-Smart-Device-Gen1-NAND.patch b/target/linux/mediatek/patches-4.4/0075-mtd-mediatek-driver-for-MTK-Smart-Device-Gen1-NAND.patch new file mode 100644 index 0000000000..e5312eb08c --- /dev/null +++ b/target/linux/mediatek/patches-4.4/0075-mtd-mediatek-driver-for-MTK-Smart-Device-Gen1-NAND.patch @@ -0,0 +1,2064 @@ +From de18239fc971cfc17c53320c66ae64dd5ade032d Mon Sep 17 00:00:00 2001 +From: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> +Date: Fri, 29 Apr 2016 12:17:22 -0400 +Subject: [PATCH 075/102] mtd: mediatek: driver for MTK Smart Device Gen1 NAND + +This patch adds support for mediatek's SDG1 NFC nand controller +embedded in SoC 2701 + +Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> +--- + drivers/mtd/nand/Kconfig | 7 + + drivers/mtd/nand/Makefile | 1 + + drivers/mtd/nand/mtk_ecc.c | 527 ++++++++++++++++ + drivers/mtd/nand/mtk_ecc.h | 53 ++ + drivers/mtd/nand/mtk_nand.c | 1432 +++++++++++++++++++++++++++++++++++++++++++ + 5 files changed, 2020 insertions(+) + create mode 100644 drivers/mtd/nand/mtk_ecc.c + create mode 100644 drivers/mtd/nand/mtk_ecc.h + create mode 100644 drivers/mtd/nand/mtk_nand.c + +--- a/drivers/mtd/nand/Kconfig ++++ b/drivers/mtd/nand/Kconfig +@@ -563,4 +563,11 @@ config MTD_NAND_QCOM + Enables support for NAND flash chips on SoCs containing the EBI2 NAND + controller. This controller is found on IPQ806x SoC. + ++config MTD_NAND_MTK ++ tristate "Support for NAND controller on MTK SoCs" ++ depends on HAS_DMA ++ help ++ Enables support for NAND controller on MTK SoCs. ++ This controller is found on mt27xx, mt81xx, mt65xx SoCs. ++ + endif # MTD_NAND +--- a/drivers/mtd/nand/Makefile ++++ b/drivers/mtd/nand/Makefile +@@ -57,5 +57,6 @@ 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_nand.o mtk_ecc.o + + nand-objs := nand_base.o nand_bbt.o nand_timings.o +--- /dev/null ++++ b/drivers/mtd/nand/mtk_ecc.c +@@ -0,0 +1,527 @@ ++/* ++ * MTK ECC controller driver. ++ * Copyright (C) 2016 MediaTek Inc. ++ * Authors: Xiaolei Li <xiaolei.li@mediatek.com> ++ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> ++ * ++ * 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 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 the ++ * GNU General Public License for more details. ++ */ ++ ++#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/semaphore.h> ++ ++#include "mtk_ecc.h" ++ ++#define ECC_ENCCON (0x00) ++#define ENC_EN (1) ++#define ENC_DE (0) ++#define ECC_ENCCNFG (0x04) ++#define ECC_CNFG_4BIT (0) ++#define ECC_CNFG_6BIT (1) ++#define ECC_CNFG_8BIT (2) ++#define ECC_CNFG_10BIT (3) ++#define ECC_CNFG_12BIT (4) ++#define ECC_CNFG_14BIT (5) ++#define ECC_CNFG_16BIT (6) ++#define ECC_CNFG_18BIT (7) ++#define ECC_CNFG_20BIT (8) ++#define ECC_CNFG_22BIT (9) ++#define ECC_CNFG_24BIT (0xa) ++#define ECC_CNFG_28BIT (0xb) ++#define ECC_CNFG_32BIT (0xc) ++#define ECC_CNFG_36BIT (0xd) ++#define ECC_CNFG_40BIT (0xe) ++#define ECC_CNFG_44BIT (0xf) ++#define ECC_CNFG_48BIT (0x10) ++#define ECC_CNFG_52BIT (0x11) ++#define ECC_CNFG_56BIT (0x12) ++#define ECC_CNFG_60BIT (0x13) ++#define ECC_MODE_SHIFT (5) ++#define ECC_MS_SHIFT (16) ++#define ECC_ENCDIADDR (0x08) ++#define ECC_ENCIDLE (0x0C) ++#define ENC_IDLE BIT(0) ++#define ECC_ENCPAR(x) (0x10 + (x) * sizeof(u32)) ++#define ECC_ENCIRQ_EN (0x80) ++#define ENC_IRQEN BIT(0) ++#define ECC_ENCIRQ_STA (0x84) ++#define ECC_DECCON (0x100) ++#define DEC_EN (1) ++#define DEC_DE (0) ++#define ECC_DECCNFG (0x104) ++#define DEC_EMPTY_EN BIT(31) ++#define DEC_CNFG_CORRECT (0x3 << 12) ++#define ECC_DECIDLE (0x10C) ++#define DEC_IDLE BIT(0) ++#define ECC_DECENUM0 (0x114) ++#define ERR_MASK (0x3f) ++#define ECC_DECDONE (0x124) ++#define ECC_DECIRQ_EN (0x200) ++#define DEC_IRQEN BIT(0) ++#define ECC_DECIRQ_STA (0x204) ++ ++#define ECC_TIMEOUT (500000) ++ ++#define ECC_IDLE_REG(x) ((x) == ECC_ENC ? ECC_ENCIDLE : ECC_DECIDLE) ++#define ECC_IDLE_MASK(x) ((x) == ECC_ENC ? ENC_IDLE : DEC_IDLE) ++#define ECC_IRQ_REG(x) ((x) == ECC_ENC ? ECC_ENCIRQ_EN : ECC_DECIRQ_EN) ++#define ECC_IRQ_EN(x) ((x) == ECC_ENC ? ENC_IRQEN : DEC_IRQEN) ++#define ECC_CTL_REG(x) ((x) == ECC_ENC ? ECC_ENCCON : ECC_DECCON) ++#define ECC_CODEC_ENABLE(x) ((x) == ECC_ENC ? ENC_EN : DEC_EN) ++#define ECC_CODEC_DISABLE(x) ((x) == ECC_ENC ? ENC_DE : DEC_DE) ++ ++struct mtk_ecc { ++ struct device *dev; ++ void __iomem *regs; ++ struct clk *clk; ++ ++ struct completion done; ++ struct semaphore sem; ++ u32 sec_mask; ++}; ++ ++static inline void mtk_ecc_codec_wait_idle(struct mtk_ecc *ecc, ++ enum mtk_ecc_codec codec) ++{ ++ struct device *dev = ecc->dev; ++ u32 val; ++ int ret; ++ ++ ret = readl_poll_timeout_atomic(ecc->regs + ECC_IDLE_REG(codec), val, ++ val & ECC_IDLE_MASK(codec), ++ 10, ECC_TIMEOUT); ++ if (ret) ++ dev_warn(dev, "%s NOT idle\n", ++ codec == ECC_ENC ? "encoder" : "decoder"); ++} ++ ++static irqreturn_t mtk_ecc_irq(int irq, void *id) ++{ ++ struct mtk_ecc *ecc = id; ++ enum mtk_ecc_codec codec; ++ u32 dec, enc; ++ ++ dec = readw(ecc->regs + ECC_DECIRQ_STA) & DEC_IRQEN; ++ if (dec) { ++ codec = ECC_DEC; ++ dec = readw(ecc->regs + ECC_DECDONE); ++ if (dec & ecc->sec_mask) { ++ ecc->sec_mask = 0; ++ complete(&ecc->done); ++ } else ++ return IRQ_HANDLED; ++ } else { ++ enc = readl(ecc->regs + ECC_ENCIRQ_STA) & ENC_IRQEN; ++ if (enc) { ++ codec = ECC_ENC; ++ complete(&ecc->done); ++ } else ++ return IRQ_NONE; ++ } ++ ++ writel(0, ecc->regs + ECC_IRQ_REG(codec)); ++ ++ return IRQ_HANDLED; ++} ++ ++static void mtk_ecc_config(struct mtk_ecc *ecc, struct mtk_ecc_config *config) ++{ ++ u32 ecc_bit = ECC_CNFG_4BIT, dec_sz, enc_sz; ++ u32 reg; ++ ++ switch (config->strength) { ++ case 4: ++ ecc_bit = ECC_CNFG_4BIT; ++ break; ++ case 6: ++ ecc_bit = ECC_CNFG_6BIT; ++ break; ++ case 8: ++ ecc_bit = ECC_CNFG_8BIT; ++ break; ++ case 10: ++ ecc_bit = ECC_CNFG_10BIT; ++ break; ++ case 12: ++ ecc_bit = ECC_CNFG_12BIT; ++ break; ++ case 14: ++ ecc_bit = ECC_CNFG_14BIT; ++ break; ++ case 16: ++ ecc_bit = ECC_CNFG_16BIT; ++ break; ++ case 18: ++ ecc_bit = ECC_CNFG_18BIT; ++ break; ++ case 20: ++ ecc_bit = ECC_CNFG_20BIT; ++ break; ++ case 22: ++ ecc_bit = ECC_CNFG_22BIT; ++ break; ++ case 24: ++ ecc_bit = ECC_CNFG_24BIT; ++ break; ++ case 28: ++ ecc_bit = ECC_CNFG_28BIT; ++ break; ++ case 32: ++ ecc_bit = ECC_CNFG_32BIT; ++ break; ++ case 36: ++ ecc_bit = ECC_CNFG_36BIT; ++ break; ++ case 40: ++ ecc_bit = ECC_CNFG_40BIT; ++ break; ++ case 44: ++ ecc_bit = ECC_CNFG_44BIT; ++ break; ++ case 48: ++ ecc_bit = ECC_CNFG_48BIT; ++ break; ++ case 52: ++ ecc_bit = ECC_CNFG_52BIT; ++ break; ++ case 56: ++ ecc_bit = ECC_CNFG_56BIT; ++ break; ++ case 60: ++ ecc_bit = ECC_CNFG_60BIT; ++ break; ++ default: ++ dev_err(ecc->dev, "invalid strength %d\n", config->strength); ++ } ++ ++ if (config->codec == ECC_ENC) { ++ /* configure ECC encoder (in bits) */ ++ enc_sz = config->enc_len << 3; ++ ++ reg = ecc_bit | (config->ecc_mode << ECC_MODE_SHIFT); ++ reg |= (enc_sz << ECC_MS_SHIFT); ++ writel(reg, ecc->regs + ECC_ENCCNFG); ++ ++ if (config->ecc_mode != ECC_NFI_MODE) ++ writel(lower_32_bits(config->addr), ++ ecc->regs + ECC_ENCDIADDR); ++ ++ } else { ++ /* configure ECC decoder (in bits) */ ++ dec_sz = config->dec_len; ++ ++ reg = ecc_bit | (config->ecc_mode << ECC_MODE_SHIFT); ++ reg |= (dec_sz << ECC_MS_SHIFT) | DEC_CNFG_CORRECT; ++ reg |= DEC_EMPTY_EN; ++ writel(reg, ecc->regs + ECC_DECCNFG); ++ ++ if (config->sec_mask) ++ ecc->sec_mask = 1 << (config->sec_mask - 1); ++ } ++} ++ ++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) * 8); ++ err &= ERR_MASK; ++ if (err == 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 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 || !platform_get_drvdata(pdev)) ++ return ERR_PTR(-EPROBE_DEFER); ++ ++ get_device(&pdev->dev); ++ ecc = platform_get_drvdata(pdev); ++ 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_codec codec = config->codec; ++ int ret; ++ ++ ret = down_interruptible(&ecc->sem); ++ if (ret) { ++ dev_err(ecc->dev, "interrupted when attempting to lock\n"); ++ return ret; ++ } ++ ++ mtk_ecc_codec_wait_idle(ecc, codec); ++ mtk_ecc_config(ecc, config); ++ writew(ECC_CODEC_ENABLE(codec), ecc->regs + ECC_CTL_REG(codec)); ++ ++ init_completion(&ecc->done); ++ writew(ECC_IRQ_EN(codec), ecc->regs + ECC_IRQ_REG(codec)); ++ ++ return 0; ++} ++EXPORT_SYMBOL(mtk_ecc_enable); ++ ++void mtk_ecc_disable(struct mtk_ecc *ecc, struct mtk_ecc_config *config) ++{ ++ enum mtk_ecc_codec codec = config->codec; ++ ++ mtk_ecc_codec_wait_idle(ecc, codec); ++ writew(0, ecc->regs + ECC_IRQ_REG(codec)); ++ writew(ECC_CODEC_DISABLE(codec), ecc->regs + ECC_CTL_REG(codec)); ++ up(&ecc->sem); ++} ++EXPORT_SYMBOL(mtk_ecc_disable); ++ ++int mtk_ecc_wait_irq_done(struct mtk_ecc *ecc, enum mtk_ecc_codec codec) ++{ ++ 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", ++ (codec == ECC_ENC) ? "encoder" : "decoder"); ++ return -ETIMEDOUT; ++ } ++ ++ return 0; ++} ++EXPORT_SYMBOL(mtk_ecc_wait_irq_done); ++ ++int mtk_ecc_encode_non_nfi_mode(struct mtk_ecc *ecc, ++ struct mtk_ecc_config *config, u8 *data, u32 bytes) ++{ ++ dma_addr_t addr; ++ u32 *p, len, i; ++ int ret = 0; ++ ++ 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->codec = ECC_ENC; ++ 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_irq_done(ecc, ECC_ENC); ++ if (ret) ++ goto timeout; ++ ++ mtk_ecc_codec_wait_idle(ecc, ECC_ENC); ++ ++ /* Program ECC bytes to OOB: per sector oob = FDM + ECC + SPARE */ ++ len = (config->strength * ECC_PARITY_BITS + 7) >> 3; ++ p = (u32 *) (data + bytes); ++ ++ /* write the parity bytes generated by the ECC back to the OOB region */ ++ for (i = 0; i < len; i++) ++ p[i] = readl(ecc->regs + ECC_ENCPAR(i)); ++timeout: ++ ++ dma_unmap_single(ecc->dev, addr, bytes, DMA_TO_DEVICE); ++ mtk_ecc_disable(ecc, config); ++ ++ return ret; ++} ++EXPORT_SYMBOL(mtk_ecc_encode_non_nfi_mode); ++ ++void mtk_ecc_hw_init(struct mtk_ecc *ecc) ++{ ++ mtk_ecc_codec_wait_idle(ecc, ECC_ENC); ++ writew(ENC_DE, ecc->regs + ECC_ENCCON); ++ ++ mtk_ecc_codec_wait_idle(ecc, ECC_DEC); ++ writel(DEC_DE, ecc->regs + ECC_DECCON); ++} ++ ++void mtk_ecc_update_strength(u32 *p) ++{ ++ u32 ecc[] = {4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36, ++ 40, 44, 48, 52, 56, 60}; ++ int i; ++ ++ for (i = 0; i < ARRAY_SIZE(ecc); i++) { ++ if (*p <= ecc[i]) { ++ if (!i) ++ *p = ecc[i]; ++ else if (*p != ecc[i]) ++ *p = ecc[i - 1]; ++ return; ++ } ++ } ++ ++ *p = ecc[ARRAY_SIZE(ecc) - 1]; ++} ++EXPORT_SYMBOL(mtk_ecc_update_strength); ++ ++static int mtk_ecc_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct mtk_ecc *ecc; ++ struct resource *res; ++ int irq, ret; ++ ++ ecc = devm_kzalloc(dev, sizeof(*ecc), GFP_KERNEL); ++ if (!ecc) ++ return -ENOMEM; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ ecc->regs = devm_ioremap_resource(dev, res); ++ if (IS_ERR(ecc->regs)) { ++ dev_err(dev, "failed to map regs: %ld\n", PTR_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) { ++ dev_err(dev, "failed to get irq\n"); ++ return -EINVAL; ++ } ++ ++ 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; ++ sema_init(&ecc->sem, 1); ++ 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; ++ } ++ ++ mtk_ecc_hw_init(ecc); ++ ++ return 0; ++} ++ ++static SIMPLE_DEV_PM_OPS(mtk_ecc_pm_ops, mtk_ecc_suspend, mtk_ecc_resume); ++#endif ++ ++static const struct of_device_id mtk_ecc_dt_match[] = { ++ { .compatible = "mediatek,mt2701-ecc" }, ++ {}, ++}; ++ ++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_AUTHOR("Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>"); ++MODULE_DESCRIPTION("MTK Nand ECC Driver"); ++MODULE_LICENSE("GPL"); +--- /dev/null ++++ b/drivers/mtd/nand/mtk_ecc.h +@@ -0,0 +1,53 @@ ++/* ++ * MTK SDG1 ECC controller ++ * ++ * Copyright (c) 2016 Mediatek ++ * Authors: Xiaolei Li <xiaolei.li@mediatek.com> ++ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> ++ * 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. ++ */ ++ ++#ifndef __DRIVERS_MTD_NAND_MTK_ECC_H__ ++#define __DRIVERS_MTD_NAND_MTK_ECC_H__ ++ ++#include <linux/types.h> ++ ++#define ECC_PARITY_BITS (14) ++ ++enum mtk_ecc_mode {ECC_DMA_MODE = 0, ECC_NFI_MODE = 1}; ++enum mtk_ecc_codec {ECC_ENC, ECC_DEC}; ++ ++struct device_node; ++struct mtk_ecc; ++ ++struct mtk_ecc_stats { ++ u32 corrected; ++ u32 bitflips; ++ u32 failed; ++}; ++ ++struct mtk_ecc_config { ++ enum mtk_ecc_mode ecc_mode; ++ enum mtk_ecc_codec codec; ++ dma_addr_t addr; ++ u32 sec_mask; ++ u32 strength; ++ u32 enc_len; ++ u32 dec_len; ++}; ++ ++int mtk_ecc_enable(struct mtk_ecc *, struct mtk_ecc_config *); ++void mtk_ecc_disable(struct mtk_ecc *, struct mtk_ecc_config *); ++int mtk_ecc_encode_non_nfi_mode(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_irq_done(struct mtk_ecc *, enum mtk_ecc_codec); ++void mtk_ecc_hw_init(struct mtk_ecc *); ++void mtk_ecc_update_strength(u32 *); ++ ++struct mtk_ecc *of_mtk_ecc_get(struct device_node *); ++void mtk_ecc_release(struct mtk_ecc *); ++ ++#endif +--- /dev/null ++++ b/drivers/mtd/nand/mtk_nand.c +@@ -0,0 +1,1432 @@ ++/* ++ * MTK NAND Flash controller driver. ++ * Copyright (C) 2016 MediaTek Inc. ++ * Authors: Xiaolei Li <xiaolei.li@mediatek.com> ++ * Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> ++ * ++ * 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 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 the ++ * GNU General Public License for more details. ++ */ ++ ++#include <linux/platform_device.h> ++#include <linux/dma-mapping.h> ++#include <linux/interrupt.h> ++#include <linux/delay.h> ++#include <linux/clk.h> ++#include <linux/mtd/nand.h> ++#include <linux/mtd/mtd.h> ++#include <linux/module.h> ++#include <linux/iopoll.h> ++#include <linux/of.h> ++#include "mtk_ecc.h" ++ ++/* NAND controller register definition */ ++#define NFI_CNFG (0x00) ++#define CNFG_AHB BIT(0) ++#define CNFG_READ_EN BIT(1) ++#define CNFG_DMA_BURST_EN BIT(2) ++#define CNFG_BYTE_RW BIT(6) ++#define CNFG_HW_ECC_EN BIT(8) ++#define CNFG_AUTO_FMT_EN BIT(9) ++#define CNFG_OP_CUST (6 << 12) ++#define NFI_PAGEFMT (0x04) ++#define PAGEFMT_FDM_ECC_SHIFT (12) ++#define PAGEFMT_FDM_SHIFT (8) ++#define PAGEFMT_SPARE_16 (0) ++#define PAGEFMT_SPARE_26 (1) ++#define PAGEFMT_SPARE_27 (2) ++#define PAGEFMT_SPARE_28 (3) ++#define PAGEFMT_SPARE_32 (4) ++#define PAGEFMT_SPARE_36 (5) ++#define PAGEFMT_SPARE_40 (6) ++#define PAGEFMT_SPARE_44 (7) ++#define PAGEFMT_SPARE_48 (8) ++#define PAGEFMT_SPARE_49 (9) ++#define PAGEFMT_SPARE_50 (0xa) ++#define PAGEFMT_SPARE_51 (0xb) ++#define PAGEFMT_SPARE_52 (0xc) ++#define PAGEFMT_SPARE_62 (0xd) ++#define PAGEFMT_SPARE_63 (0xe) ++#define PAGEFMT_SPARE_64 (0xf) ++#define PAGEFMT_SPARE_SHIFT (4) ++#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) ++/* NFI control */ ++#define NFI_CON (0x08) ++#define CON_FIFO_FLUSH BIT(0) ++#define CON_NFI_RST BIT(1) ++#define CON_BRD BIT(8) /* burst read */ ++#define CON_BWR BIT(9) /* burst write */ ++#define CON_SEC_SHIFT (12) ++/* Timming control register */ ++#define NFI_ACCCON (0x0C) ++#define NFI_INTR_EN (0x10) ++#define INTR_AHB_DONE_EN BIT(6) ++#define NFI_INTR_STA (0x14) ++#define NFI_CMD (0x20) ++#define NFI_ADDRNOB (0x30) ++#define NFI_COLADDR (0x34) ++#define NFI_ROWADDR (0x38) ++#define NFI_STRDATA (0x40) ++#define STAR_EN (1) ++#define STAR_DE (0) ++#define NFI_CNRNB (0x44) ++#define NFI_DATAW (0x50) ++#define NFI_DATAR (0x54) ++#define NFI_PIO_DIRDY (0x58) ++#define PIO_DI_RDY (0x01) ++#define NFI_STA (0x60) ++#define STA_CMD BIT(0) ++#define STA_ADDR BIT(1) ++#define STA_BUSY BIT(8) ++#define STA_EMP_PAGE BIT(12) ++#define NFI_FSM_CUSTDATA (0xe << 16) ++#define NFI_FSM_MASK (0xf << 16) ++#define NFI_ADDRCNTR (0x70) ++#define CNTR_MASK GENMASK(16, 12) ++#define NFI_STRADDR (0x80) ++#define NFI_BYTELEN (0x84) ++#define NFI_CSEL (0x90) ++#define NFI_FDML(x) (0xA0 + (x) * sizeof(u32) * 2) ++#define NFI_FDMM(x) (0xA4 + (x) * sizeof(u32) * 2) ++#define NFI_FDM_MAX_SIZE (8) ++#define NFI_MASTER_STA (0x224) ++#define MASTER_STA_MASK (0x0FFF) ++#define NFI_EMPTY_THRESH (0x23C) ++ ++#define MTK_NAME "mtk-nand" ++#define KB(x) ((x) * 1024UL) ++#define MB(x) (KB(x) * 1024UL) ++ ++#define MTK_TIMEOUT (500000) ++#define MTK_RESET_TIMEOUT (1000000) ++#define MTK_MAX_SECTOR (16) ++#define MTK_NAND_MAX_NSELS (2) ++ ++typedef void (*bad_mark_swap)(struct mtd_info *, uint8_t *buf, int raw); ++struct mtk_nfc_bad_mark_ctl { ++ bad_mark_swap bm_swap; ++ u32 sec; ++ u32 pos; ++}; ++ ++/* ++ * FDM: region used to store free OOB data ++ */ ++struct mtk_nfc_fdm { ++ u32 reg_size; ++ u32 ecc_size; ++}; ++ ++struct mtk_nfc_nand_chip { ++ struct list_head node; ++ struct nand_chip nand; ++ ++ struct mtk_nfc_bad_mark_ctl bad_mark; ++ struct mtk_nfc_fdm fdm; ++ u32 spare_per_sector; ++ ++ int nsels; ++ u8 sels[0]; ++ /* nothing after this field */ ++}; ++ ++struct mtk_nfc_clk { ++ struct clk *nfi_clk; ++ struct clk *pad_clk; ++}; ++ ++struct mtk_nfc { ++ struct nand_hw_control controller; ++ struct mtk_ecc_config ecc_cfg; ++ struct mtk_nfc_clk clk; ++ struct mtk_ecc *ecc; ++ ++ struct device *dev; ++ void __iomem *regs; ++ ++ struct completion done; ++ struct list_head chips; ++ ++ u8 *buffer; ++}; ++ ++static inline struct mtk_nfc_nand_chip *to_mtk_nand(struct nand_chip *nand) ++{ ++ return container_of(nand, struct mtk_nfc_nand_chip, nand); ++} ++ ++static inline uint8_t *data_ptr(struct nand_chip *chip, const uint8_t *p, int i) ++{ ++ return (uint8_t *) p + i * chip->ecc.size; ++} ++ ++static inline uint8_t *oob_ptr(struct nand_chip *chip, int i) ++{ ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ uint8_t *poi; ++ ++ if (i < mtk_nand->bad_mark.sec) ++ poi = chip->oob_poi + (i + 1) * mtk_nand->fdm.reg_size; ++ else if (i == mtk_nand->bad_mark.sec) ++ poi = chip->oob_poi; ++ else ++ poi = chip->oob_poi + i * mtk_nand->fdm.reg_size; ++ ++ return poi; ++} ++ ++static inline int mtk_data_len(struct nand_chip *chip) ++{ ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ ++ return chip->ecc.size + mtk_nand->spare_per_sector; ++} ++ ++static inline uint8_t *mtk_data_ptr(struct nand_chip *chip, int i) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ ++ return nfc->buffer + i * mtk_data_len(chip); ++} ++ ++static inline uint8_t *mtk_oob_ptr(struct nand_chip *chip, int i) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ ++ return nfc->buffer + i * mtk_data_len(chip) + chip->ecc.size; ++} ++ ++static inline void nfi_writel(struct mtk_nfc *nfc, u32 val, u32 reg) ++{ ++ writel(val, nfc->regs + reg); ++} ++ ++static inline void nfi_writew(struct mtk_nfc *nfc, u16 val, u32 reg) ++{ ++ writew(val, nfc->regs + reg); ++} ++ ++static inline void nfi_writeb(struct mtk_nfc *nfc, u8 val, u32 reg) ++{ ++ writeb(val, nfc->regs + reg); ++} ++ ++static inline u32 nfi_readl(struct mtk_nfc *nfc, u32 reg) ++{ ++ return readl_relaxed(nfc->regs + reg); ++} ++ ++static inline u16 nfi_readw(struct mtk_nfc *nfc, u32 reg) ++{ ++ return readw_relaxed(nfc->regs + reg); ++} ++ ++static inline u8 nfi_readb(struct mtk_nfc *nfc, u32 reg) ++{ ++ return readb_relaxed(nfc->regs + reg); ++} ++ ++static void mtk_nfc_hw_reset(struct mtk_nfc *nfc) ++{ ++ struct device *dev = nfc->dev; ++ u32 val; ++ int ret; ++ ++ /* reset all registers and force the NFI master to terminate */ ++ nfi_writel(nfc, CON_FIFO_FLUSH | CON_NFI_RST, NFI_CON); ++ ++ /* wait for the master to finish the last transaction */ ++ ret = readl_poll_timeout(nfc->regs + NFI_MASTER_STA, val, ++ !(val & MASTER_STA_MASK), 50, MTK_RESET_TIMEOUT); ++ if (ret) ++ dev_warn(dev, "master active in reset [0x%x] = 0x%x\n", ++ NFI_MASTER_STA, val); ++ ++ /* ensure any status register affected by the NFI master is reset */ ++ nfi_writel(nfc, CON_FIFO_FLUSH | CON_NFI_RST, NFI_CON); ++ nfi_writew(nfc, STAR_DE, NFI_STRDATA); ++} ++ ++static int mtk_nfc_send_command(struct mtk_nfc *nfc, u8 command) ++{ ++ struct device *dev = nfc->dev; ++ u32 val; ++ int ret; ++ ++ nfi_writel(nfc, command, NFI_CMD); ++ ++ ret = readl_poll_timeout_atomic(nfc->regs + NFI_STA, val, ++ !(val & STA_CMD), 10, MTK_TIMEOUT); ++ if (ret) { ++ dev_warn(dev, "nfi core timed out entering command mode\n"); ++ return -EIO; ++ } ++ ++ return 0; ++} ++ ++static int mtk_nfc_send_address(struct mtk_nfc *nfc, int addr) ++{ ++ struct device *dev = nfc->dev; ++ u32 val; ++ int ret; ++ ++ nfi_writel(nfc, addr, NFI_COLADDR); ++ nfi_writel(nfc, 0, NFI_ROWADDR); ++ nfi_writew(nfc, 1, NFI_ADDRNOB); ++ ++ ret = readl_poll_timeout_atomic(nfc->regs + NFI_STA, val, ++ !(val & STA_ADDR), 10, MTK_TIMEOUT); ++ if (ret) { ++ dev_warn(dev, "nfi core timed out entering address mode\n"); ++ return -EIO; ++ } ++ ++ return 0; ++} ++ ++static int mtk_nfc_hw_runtime_config(struct mtd_info *mtd) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ u32 fmt, spare; ++ ++ if (!mtd->writesize) ++ return 0; ++ ++ spare = mtk_nand->spare_per_sector; ++ ++ switch (mtd->writesize) { ++ case 512: ++ fmt = PAGEFMT_512_2K | PAGEFMT_SEC_SEL_512; ++ break; ++ case KB(2): ++ if (chip->ecc.size == 512) ++ fmt = PAGEFMT_2K_4K | PAGEFMT_SEC_SEL_512; ++ else ++ fmt = PAGEFMT_512_2K; ++ break; ++ case KB(4): ++ if (chip->ecc.size == 512) ++ fmt = PAGEFMT_4K_8K | PAGEFMT_SEC_SEL_512; ++ else ++ fmt = PAGEFMT_2K_4K; ++ break; ++ case KB(8): ++ if (chip->ecc.size == 512) ++ fmt = PAGEFMT_8K_16K | PAGEFMT_SEC_SEL_512; ++ else ++ fmt = PAGEFMT_4K_8K; ++ break; ++ case KB(16): ++ fmt = PAGEFMT_8K_16K; ++ break; ++ default: ++ dev_err(nfc->dev, "invalid page len: %d\n", mtd->writesize); ++ return -EINVAL; ++ } ++ ++ /* the hardware doubles the value for this eccsize so let's halve it */ ++ if (chip->ecc.size == 1024) ++ spare >>= 1; ++ ++ switch (spare) { ++ case 16: ++ fmt |= (PAGEFMT_SPARE_16 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 26: ++ fmt |= (PAGEFMT_SPARE_26 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 27: ++ fmt |= (PAGEFMT_SPARE_27 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 28: ++ fmt |= (PAGEFMT_SPARE_28 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 32: ++ fmt |= (PAGEFMT_SPARE_32 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 36: ++ fmt |= (PAGEFMT_SPARE_36 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 40: ++ fmt |= (PAGEFMT_SPARE_40 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 44: ++ fmt |= (PAGEFMT_SPARE_44 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 48: ++ fmt |= (PAGEFMT_SPARE_48 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 49: ++ fmt |= (PAGEFMT_SPARE_49 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 50: ++ fmt |= (PAGEFMT_SPARE_50 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 51: ++ fmt |= (PAGEFMT_SPARE_51 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 52: ++ fmt |= (PAGEFMT_SPARE_52 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 62: ++ fmt |= (PAGEFMT_SPARE_62 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 63: ++ fmt |= (PAGEFMT_SPARE_63 << PAGEFMT_SPARE_SHIFT); ++ break; ++ case 64: ++ fmt |= (PAGEFMT_SPARE_64 << PAGEFMT_SPARE_SHIFT); ++ break; ++ default: ++ dev_err(nfc->dev, "invalid spare per sector %d\n", spare); ++ return -EINVAL; ++ } ++ ++ fmt |= mtk_nand->fdm.reg_size << PAGEFMT_FDM_SHIFT; ++ fmt |= mtk_nand->fdm.ecc_size << PAGEFMT_FDM_ECC_SHIFT; ++ nfi_writew(nfc, fmt, NFI_PAGEFMT); ++ ++ nfc->ecc_cfg.strength = chip->ecc.strength; ++ nfc->ecc_cfg.enc_len = chip->ecc.size + mtk_nand->fdm.ecc_size; ++ nfc->ecc_cfg.dec_len = (nfc->ecc_cfg.enc_len << 3) ++ + chip->ecc.strength * ECC_PARITY_BITS; ++ ++ return 0; ++} ++ ++static void mtk_nfc_select_chip(struct mtd_info *mtd, int chip) ++{ ++ struct nand_chip *nand = mtd_to_nand(mtd); ++ struct mtk_nfc *nfc = nand_get_controller_data(nand); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(nand); ++ ++ if (chip < 0) ++ return; ++ ++ mtk_nfc_hw_runtime_config(mtd); ++ ++ nfi_writel(nfc, mtk_nand->sels[chip], NFI_CSEL); ++} ++ ++static int mtk_nfc_dev_ready(struct mtd_info *mtd) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(mtd_to_nand(mtd)); ++ ++ if (nfi_readl(nfc, NFI_STA) & STA_BUSY) ++ return 0; ++ ++ return 1; ++} ++ ++static void mtk_nfc_cmd_ctrl(struct mtd_info *mtd, int dat, unsigned int ctrl) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(mtd_to_nand(mtd)); ++ ++ if (ctrl & NAND_ALE) ++ mtk_nfc_send_address(nfc, dat); ++ else if (ctrl & NAND_CLE) { ++ mtk_nfc_hw_reset(nfc); ++ ++ nfi_writew(nfc, CNFG_OP_CUST, NFI_CNFG); ++ mtk_nfc_send_command(nfc, dat); ++ } ++} ++ ++static inline void mtk_nfc_wait_ioready(struct mtk_nfc *nfc) ++{ ++ int rc; ++ u8 val; ++ ++ rc = readb_poll_timeout_atomic(nfc->regs + NFI_PIO_DIRDY, val, ++ val & PIO_DI_RDY, 10, MTK_TIMEOUT); ++ if (rc < 0) ++ dev_err(nfc->dev, "data not ready\n"); ++} ++ ++static inline uint8_t mtk_nfc_read_byte(struct mtd_info *mtd) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ u32 reg; ++ ++ reg = nfi_readl(nfc, NFI_STA) & NFI_FSM_MASK; ++ if (reg != NFI_FSM_CUSTDATA) { ++ reg = nfi_readw(nfc, NFI_CNFG); ++ reg |= CNFG_BYTE_RW | CNFG_READ_EN; ++ nfi_writew(nfc, reg, NFI_CNFG); ++ ++ reg = (MTK_MAX_SECTOR << CON_SEC_SHIFT) | CON_BRD; ++ nfi_writel(nfc, reg, NFI_CON); ++ ++ /* trigger to fetch data */ ++ nfi_writew(nfc, STAR_EN, NFI_STRDATA); ++ } ++ ++ mtk_nfc_wait_ioready(nfc); ++ ++ return nfi_readb(nfc, NFI_DATAR); ++} ++ ++static void mtk_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) ++{ ++ int i; ++ ++ for (i = 0; i < len; i++) ++ buf[i] = mtk_nfc_read_byte(mtd); ++} ++ ++static void mtk_nfc_write_byte(struct mtd_info *mtd, uint8_t byte) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(mtd_to_nand(mtd)); ++ u32 reg; ++ ++ reg = nfi_readl(nfc, NFI_STA) & NFI_FSM_MASK; ++ ++ if (reg != NFI_FSM_CUSTDATA) { ++ reg = nfi_readw(nfc, NFI_CNFG) | CNFG_BYTE_RW; ++ nfi_writew(nfc, reg, NFI_CNFG); ++ ++ reg = MTK_MAX_SECTOR << CON_SEC_SHIFT | CON_BWR; ++ nfi_writel(nfc, reg, NFI_CON); ++ ++ nfi_writew(nfc, STAR_EN, NFI_STRDATA); ++ } ++ ++ mtk_nfc_wait_ioready(nfc); ++ nfi_writeb(nfc, byte, NFI_DATAW); ++} ++ ++static void mtk_nfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) ++{ ++ int i; ++ ++ for (i = 0; i < len; i++) ++ mtk_nfc_write_byte(mtd, buf[i]); ++} ++ ++static int mtk_nfc_sector_encode(struct nand_chip *chip, u8 *data) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ int size = chip->ecc.size + mtk_nand->fdm.reg_size; ++ ++ nfc->ecc_cfg.ecc_mode = ECC_DMA_MODE; ++ nfc->ecc_cfg.codec = ECC_ENC; ++ return mtk_ecc_encode_non_nfi_mode(nfc->ecc, &nfc->ecc_cfg, data, size); ++} ++ ++static void mtk_nfc_no_bad_mark_swap(struct mtd_info *a, uint8_t *b, int c) ++{ ++ /* nope */ ++} ++ ++static void mtk_nfc_bad_mark_swap(struct mtd_info *mtd, uint8_t *buf, int raw) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *nand = to_mtk_nand(chip); ++ u32 bad_pos = nand->bad_mark.pos; ++ ++ if (raw) ++ bad_pos += nand->bad_mark.sec * mtk_data_len(chip); ++ else ++ bad_pos += nand->bad_mark.sec * chip->ecc.size; ++ ++ swap(chip->oob_poi[0], buf[bad_pos]); ++} ++ ++static int mtk_nfc_format_subpage(struct mtd_info *mtd, uint32_t offset, ++ uint32_t len, const uint8_t *buf) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_fdm *fdm = &mtk_nand->fdm; ++ u32 start, end; ++ int i, ret; ++ ++ start = offset / chip->ecc.size; ++ end = DIV_ROUND_UP(offset + len, chip->ecc.size); ++ ++ memset(nfc->buffer, 0xff, mtd->writesize + mtd->oobsize); ++ for (i = 0; i < chip->ecc.steps; i++) { ++ ++ memcpy(mtk_data_ptr(chip, i), data_ptr(chip, buf, i), ++ chip->ecc.size); ++ ++ if (start > i || i >= end) ++ continue; ++ ++ if (i == mtk_nand->bad_mark.sec) ++ mtk_nand->bad_mark.bm_swap(mtd, nfc->buffer, 1); ++ ++ memcpy(mtk_oob_ptr(chip, i), oob_ptr(chip, i), fdm->reg_size); ++ ++ /* program the CRC back to the OOB */ ++ ret = mtk_nfc_sector_encode(chip, mtk_data_ptr(chip, i)); ++ if (ret < 0) ++ return ret; ++ } ++ ++ return 0; ++} ++ ++static void mtk_nfc_format_page(struct mtd_info *mtd, const uint8_t *buf) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_fdm *fdm = &mtk_nand->fdm; ++ u32 i; ++ ++ memset(nfc->buffer, 0xff, mtd->writesize + mtd->oobsize); ++ for (i = 0; i < chip->ecc.steps; i++) { ++ if (buf) ++ memcpy(mtk_data_ptr(chip, i), data_ptr(chip, buf, i), ++ chip->ecc.size); ++ ++ if (i == mtk_nand->bad_mark.sec) ++ mtk_nand->bad_mark.bm_swap(mtd, nfc->buffer, 1); ++ ++ memcpy(mtk_oob_ptr(chip, i), oob_ptr(chip, i), fdm->reg_size); ++ } ++} ++ ++static inline void mtk_nfc_read_fdm(struct nand_chip *chip, u32 start, ++ u32 sectors) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ u32 *p; ++ int i; ++ ++ for (i = 0; i < sectors; i++) { ++ p = (u32 *) oob_ptr(chip, start + i); ++ p[0] = nfi_readl(nfc, NFI_FDML(i)); ++ p[1] = nfi_readl(nfc, NFI_FDMM(i)); ++ } ++} ++ ++static inline void mtk_nfc_write_fdm(struct nand_chip *chip) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ u32 *p; ++ int i; ++ ++ for (i = 0; i < chip->ecc.steps ; i++) { ++ p = (u32 *) oob_ptr(chip, i); ++ nfi_writel(nfc, p[0], NFI_FDML(i)); ++ nfi_writel(nfc, p[1], NFI_FDMM(i)); ++ } ++} ++ ++static int mtk_nfc_do_write_page(struct mtd_info *mtd, struct nand_chip *chip, ++ const uint8_t *buf, int page, int len) ++{ ++ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct device *dev = nfc->dev; ++ dma_addr_t addr; ++ u32 reg; ++ int ret; ++ ++ addr = dma_map_single(dev, (void *) buf, len, DMA_TO_DEVICE); ++ ret = dma_mapping_error(nfc->dev, addr); ++ if (ret) { ++ dev_err(nfc->dev, "dma mapping error\n"); ++ return -EINVAL; ++ } ++ ++ reg = nfi_readw(nfc, NFI_CNFG) | CNFG_AHB | CNFG_DMA_BURST_EN; ++ nfi_writew(nfc, reg, NFI_CNFG); ++ ++ nfi_writel(nfc, chip->ecc.steps << CON_SEC_SHIFT, NFI_CON); ++ nfi_writel(nfc, lower_32_bits(addr), NFI_STRADDR); ++ nfi_writew(nfc, INTR_AHB_DONE_EN, NFI_INTR_EN); ++ ++ init_completion(&nfc->done); ++ ++ reg = nfi_readl(nfc, NFI_CON) | CON_BWR; ++ nfi_writel(nfc, reg, NFI_CON); ++ nfi_writew(nfc, STAR_EN, NFI_STRDATA); ++ ++ ret = wait_for_completion_timeout(&nfc->done, msecs_to_jiffies(500)); ++ if (!ret) { ++ dev_err(dev, "program ahb done timeout\n"); ++ nfi_writew(nfc, 0, NFI_INTR_EN); ++ ret = -ETIMEDOUT; ++ goto timeout; ++ } ++ ++ ret = readl_poll_timeout_atomic(nfc->regs + NFI_ADDRCNTR, reg, ++ (reg & CNTR_MASK) >= chip->ecc.steps, 10, MTK_TIMEOUT); ++ if (ret) ++ dev_err(dev, "hwecc write timeout\n"); ++ ++timeout: ++ ++ dma_unmap_single(nfc->dev, addr, len, DMA_TO_DEVICE); ++ nfi_writel(nfc, 0, NFI_CON); ++ ++ return ret; ++} ++ ++static int mtk_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip, ++ const uint8_t *buf, int page, int raw) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ size_t len; ++ const u8 *bufpoi; ++ u32 reg; ++ int ret; ++ ++ if (!raw) { ++ /* OOB => FDM: from register, ECC: from HW */ ++ reg = nfi_readw(nfc, NFI_CNFG) | CNFG_AUTO_FMT_EN; ++ nfi_writew(nfc, reg | CNFG_HW_ECC_EN, NFI_CNFG); ++ ++ nfc->ecc_cfg.codec = ECC_ENC; ++ nfc->ecc_cfg.ecc_mode = ECC_NFI_MODE; ++ ret = mtk_ecc_enable(nfc->ecc, &nfc->ecc_cfg); ++ if (ret) { ++ /* clear NFI config */ ++ reg = nfi_readw(nfc, NFI_CNFG); ++ reg &= ~(CNFG_AUTO_FMT_EN | CNFG_HW_ECC_EN); ++ nfi_writew(nfc, reg, NFI_CNFG); ++ ++ return ret; ++ } ++ ++ memcpy(nfc->buffer, buf, mtd->writesize); ++ mtk_nand->bad_mark.bm_swap(mtd, nfc->buffer, raw); ++ bufpoi = nfc->buffer; ++ ++ /* write OOB into the FDM registers (OOB area in MTK NAND) */ ++ mtk_nfc_write_fdm(chip); ++ } else ++ bufpoi = buf; ++ ++ len = mtd->writesize + (raw ? mtd->oobsize : 0); ++ ret = mtk_nfc_do_write_page(mtd, chip, bufpoi, page, len); ++ ++ if (!raw) ++ mtk_ecc_disable(nfc->ecc, &nfc->ecc_cfg); ++ ++ return ret; ++} ++ ++static int mtk_nfc_write_page_hwecc(struct mtd_info *mtd, ++ struct nand_chip *chip, const uint8_t *buf, int oob_on, int page) ++{ ++ return mtk_nfc_write_page(mtd, chip, buf, page, 0); ++} ++ ++static int mtk_nfc_write_page_raw(struct mtd_info *mtd, struct nand_chip *chip, ++ const uint8_t *buf, int oob_on, int pg) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ ++ mtk_nfc_format_page(mtd, buf); ++ return mtk_nfc_write_page(mtd, chip, nfc->buffer, pg, 1); ++} ++ ++static int mtk_nfc_write_subpage_hwecc(struct mtd_info *mtd, ++ struct nand_chip *chip, uint32_t offset, uint32_t data_len, ++ const uint8_t *buf, int oob_on, int page) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ int ret; ++ ++ ret = mtk_nfc_format_subpage(mtd, offset, data_len, buf); ++ if (ret < 0) ++ return ret; ++ ++ /* use the data in the private buffer (now with FDM and CRC) */ ++ return mtk_nfc_write_page(mtd, chip, nfc->buffer, page, 1); ++} ++ ++static int mtk_nfc_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip, ++ int page) ++{ ++ int ret; ++ ++ chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); ++ ++ ret = mtk_nfc_write_page_raw(mtd, chip, NULL, 1, page); ++ if (ret < 0) ++ return -EIO; ++ ++ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); ++ ret = chip->waitfunc(mtd, chip); ++ ++ return ret & NAND_STATUS_FAIL ? -EIO : 0; ++} ++ ++static int mtk_nfc_update_ecc_stats(struct mtd_info *mtd, u8 *buf, u32 sectors) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ struct mtk_ecc_stats stats; ++ int rc, i; ++ ++ rc = nfi_readl(nfc, NFI_STA) & STA_EMP_PAGE; ++ if (rc) { ++ memset(buf, 0xff, sectors * chip->ecc.size); ++ for (i = 0; i < sectors; i++) ++ memset(oob_ptr(chip, i), 0xff, mtk_nand->fdm.reg_size); ++ return 0; ++ } ++ ++ mtk_ecc_get_stats(nfc->ecc, &stats, sectors); ++ mtd->ecc_stats.corrected += stats.corrected; ++ mtd->ecc_stats.failed += stats.failed; ++ ++ return stats.bitflips; ++} ++ ++static int mtk_nfc_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, ++ uint32_t data_offs, uint32_t readlen, uint8_t *bufpoi, ++ int page, int raw) ++{ ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ u32 spare = mtk_nand->spare_per_sector; ++ u32 column, sectors, start, end, reg; ++ dma_addr_t addr; ++ int bitflips; ++ size_t len; ++ u8 *buf; ++ int rc; ++ ++ start = data_offs / chip->ecc.size; ++ end = DIV_ROUND_UP(data_offs + readlen, chip->ecc.size); ++ ++ sectors = end - start; ++ column = start * (chip->ecc.size + spare); ++ ++ len = sectors * chip->ecc.size + (raw ? sectors * spare : 0); ++ buf = bufpoi + start * chip->ecc.size; ++ ++ if (column != 0) ++ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, column, -1); ++ ++ addr = dma_map_single(nfc->dev, buf, len, DMA_FROM_DEVICE); ++ rc = dma_mapping_error(nfc->dev, addr); ++ if (rc) { ++ dev_err(nfc->dev, "dma mapping error\n"); ++ ++ return -EINVAL; ++ } ++ ++ reg = nfi_readw(nfc, NFI_CNFG); ++ reg |= CNFG_READ_EN | CNFG_DMA_BURST_EN | CNFG_AHB; ++ if (!raw) { ++ reg |= CNFG_AUTO_FMT_EN | CNFG_HW_ECC_EN; ++ nfi_writew(nfc, reg, NFI_CNFG); ++ ++ nfc->ecc_cfg.ecc_mode = ECC_NFI_MODE; ++ nfc->ecc_cfg.sec_mask = sectors; ++ nfc->ecc_cfg.codec = ECC_DEC; ++ rc = mtk_ecc_enable(nfc->ecc, &nfc->ecc_cfg); ++ if (rc) { ++ dev_err(nfc->dev, "ecc enable\n"); ++ /* clear NFI_CNFG */ ++ reg &= ~(CNFG_DMA_BURST_EN | CNFG_AHB | CNFG_READ_EN | ++ CNFG_AUTO_FMT_EN | CNFG_HW_ECC_EN); ++ nfi_writew(nfc, reg, NFI_CNFG); ++ dma_unmap_single(nfc->dev, addr, len, DMA_FROM_DEVICE); ++ ++ return rc; ++ } ++ } else ++ nfi_writew(nfc, reg, NFI_CNFG); ++ ++ nfi_writel(nfc, sectors << CON_SEC_SHIFT, NFI_CON); ++ nfi_writew(nfc, INTR_AHB_DONE_EN, NFI_INTR_EN); ++ nfi_writel(nfc, lower_32_bits(addr), NFI_STRADDR); ++ ++ init_completion(&nfc->done); ++ reg = nfi_readl(nfc, NFI_CON) | CON_BRD; ++ nfi_writel(nfc, reg, NFI_CON); ++ nfi_writew(nfc, STAR_EN, NFI_STRDATA); ++ ++ rc = wait_for_completion_timeout(&nfc->done, msecs_to_jiffies(500)); ++ if (!rc) ++ dev_warn(nfc->dev, "read ahb/dma done timeout\n"); ++ ++ rc = readl_poll_timeout_atomic(nfc->regs + NFI_BYTELEN, reg, ++ (reg & CNTR_MASK) >= sectors, 10, MTK_TIMEOUT); ++ if (rc < 0) { ++ dev_err(nfc->dev, "subpage done timeout\n"); ++ bitflips = -EIO; ++ } else { ++ bitflips = 0; ++ if (!raw) { ++ rc = mtk_ecc_wait_irq_done(nfc->ecc, ECC_DEC); ++ bitflips = rc < 0 ? -ETIMEDOUT : ++ mtk_nfc_update_ecc_stats(mtd, buf, sectors); ++ mtk_nfc_read_fdm(chip, start, sectors); ++ } ++ } ++ ++ dma_unmap_single(nfc->dev, addr, len, DMA_FROM_DEVICE); ++ ++ if (raw) ++ goto done; ++ ++ mtk_ecc_disable(nfc->ecc, &nfc->ecc_cfg); ++ ++ if (clamp(mtk_nand->bad_mark.sec, start, end) == mtk_nand->bad_mark.sec) ++ mtk_nand->bad_mark.bm_swap(mtd, bufpoi, raw); ++done: ++ nfi_writel(nfc, 0, NFI_CON); ++ ++ return bitflips; ++} ++ ++static int mtk_nfc_read_subpage_hwecc(struct mtd_info *mtd, ++ struct nand_chip *chip, uint32_t off, uint32_t len, uint8_t *p, int pg) ++{ ++ return mtk_nfc_read_subpage(mtd, chip, off, len, p, pg, 0); ++} ++ ++static int mtk_nfc_read_page_hwecc(struct mtd_info *mtd, ++ struct nand_chip *chip, uint8_t *p, int oob_on, int pg) ++{ ++ return mtk_nfc_read_subpage(mtd, chip, 0, mtd->writesize, p, pg, 0); ++} ++ ++static int mtk_nfc_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip, ++ uint8_t *buf, int oob_on, int page) ++{ ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ struct mtk_nfc *nfc = nand_get_controller_data(chip); ++ struct mtk_nfc_fdm *fdm = &mtk_nand->fdm; ++ int i, ret; ++ ++ memset(nfc->buffer, 0xff, mtd->writesize + mtd->oobsize); ++ ret = mtk_nfc_read_subpage(mtd, chip, 0, mtd->writesize, nfc->buffer, ++ page, 1); ++ if (ret < 0) ++ return ret; ++ ++ for (i = 0; i < chip->ecc.steps; i++) { ++ memcpy(oob_ptr(chip, i), mtk_oob_ptr(chip, i), fdm->reg_size); ++ if (i == mtk_nand->bad_mark.sec) ++ mtk_nand->bad_mark.bm_swap(mtd, nfc->buffer, 1); ++ ++ if (buf) ++ memcpy(data_ptr(chip, buf, i), mtk_data_ptr(chip, i), ++ chip->ecc.size); ++ } ++ ++ return ret; ++} ++ ++static int mtk_nfc_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, ++ int page) ++{ ++ chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); ++ ++ return mtk_nfc_read_page_raw(mtd, chip, NULL, 1, page); ++} ++ ++static inline void mtk_nfc_hw_init(struct mtk_nfc *nfc) ++{ ++ nfi_writel(nfc, 0x10804211, NFI_ACCCON); ++ nfi_writew(nfc, 0xf1, NFI_CNRNB); ++ nfi_writew(nfc, PAGEFMT_8K_16K, NFI_PAGEFMT); ++ ++ mtk_nfc_hw_reset(nfc); ++ ++ nfi_readl(nfc, NFI_INTR_STA); ++ nfi_writel(nfc, 0, NFI_INTR_EN); ++} ++ ++static irqreturn_t mtk_nfc_irq(int irq, void *id) ++{ ++ struct mtk_nfc *nfc = id; ++ u16 sta, ien; ++ ++ sta = nfi_readw(nfc, NFI_INTR_STA); ++ ien = nfi_readw(nfc, NFI_INTR_EN); ++ ++ if (!(sta & ien)) ++ return IRQ_NONE; ++ ++ nfi_writew(nfc, ~sta & ien, NFI_INTR_EN); ++ complete(&nfc->done); ++ ++ return IRQ_HANDLED; ++} ++ ++static int mtk_nfc_enable_clk(struct device *dev, struct mtk_nfc_clk *clk) ++{ ++ int ret; ++ ++ ret = clk_prepare_enable(clk->nfi_clk); ++ if (ret) { ++ dev_err(dev, "failed to enable nfi clk\n"); ++ return ret; ++ } ++ ++ ret = clk_prepare_enable(clk->pad_clk); ++ if (ret) { ++ dev_err(dev, "failed to enable pad clk\n"); ++ clk_disable_unprepare(clk->nfi_clk); ++ return ret; ++ } ++ ++ return 0; ++} ++ ++static void mtk_nfc_disable_clk(struct mtk_nfc_clk *clk) ++{ ++ clk_disable_unprepare(clk->nfi_clk); ++ clk_disable_unprepare(clk->pad_clk); ++} ++ ++static int mtk_nfc_ooblayout_free(struct mtd_info *mtd, int section, ++ struct mtd_oob_region *oob_region) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ struct mtk_nfc_fdm *fdm = &mtk_nand->fdm; ++ u32 eccsteps; ++ ++ eccsteps = mtd->writesize / chip->ecc.size; ++ ++ if (section >= eccsteps) ++ return -ERANGE; ++ ++ oob_region->length = fdm->reg_size - fdm->ecc_size; ++ oob_region->offset = section * fdm->reg_size + fdm->ecc_size; ++ ++ return 0; ++} ++ ++static int mtk_nfc_ooblayout_ecc(struct mtd_info *mtd, int section, ++ struct mtd_oob_region *oob_region) ++{ ++ struct nand_chip *chip = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *mtk_nand = to_mtk_nand(chip); ++ u32 eccsteps; ++ ++ if (section) ++ return -ERANGE; ++ ++ eccsteps = mtd->writesize / chip->ecc.size; ++ oob_region->offset = mtk_nand->fdm.reg_size * eccsteps; ++ oob_region->length = mtd->oobsize - oob_region->offset; ++ ++ return 0; ++} ++ ++static const struct mtd_ooblayout_ops mtk_nfc_ooblayout_ops = { ++ .free = mtk_nfc_ooblayout_free, ++ .ecc = mtk_nfc_ooblayout_ecc, ++}; ++ ++static void mtk_nfc_set_fdm(struct mtk_nfc_fdm *fdm, struct mtd_info *mtd) ++{ ++ struct nand_chip *nand = mtd_to_nand(mtd); ++ struct mtk_nfc_nand_chip *chip = to_mtk_nand(nand); ++ u32 ecc_bytes; ++ ++ ecc_bytes = DIV_ROUND_UP(nand->ecc.strength * ECC_PARITY_BITS, 8); ++ ++ fdm->reg_size = chip->spare_per_sector - ecc_bytes; ++ if (fdm->reg_size > NFI_FDM_MAX_SIZE) ++ fdm->reg_size = NFI_FDM_MAX_SIZE; ++ ++ /* bad block mark storage */ ++ fdm->ecc_size = 1; ++} ++ ++static void mtk_nfc_set_bad_mark_ctl(struct mtk_nfc_bad_mark_ctl *bm_ctl, ++ struct mtd_info *mtd) ++{ ++ struct nand_chip *nand = mtd_to_nand(mtd); ++ ++ if (mtd->writesize == 512) ++ bm_ctl->bm_swap = mtk_nfc_no_bad_mark_swap; ++ else { ++ bm_ctl->bm_swap = mtk_nfc_bad_mark_swap; ++ bm_ctl->sec = mtd->writesize / mtk_data_len(nand); ++ bm_ctl->pos = mtd->writesize % mtk_data_len(nand); ++ } ++} ++ ++static void mtk_nfc_set_spare_per_sector(u32 *sps, struct mtd_info *mtd) ++{ ++ struct nand_chip *nand = mtd_to_nand(mtd); ++ u32 spare[] = {16, 26, 27, 28, 32, 36, 40, 44, ++ 48, 49, 50, 51, 52, 62, 63, 64}; ++ u32 eccsteps, i; ++ ++ eccsteps = mtd->writesize / nand->ecc.size; ++ *sps = mtd->oobsize / eccsteps; ++ ++ if (nand->ecc.size == 1024) ++ *sps >>= 1; ++ ++ for (i = 0; i < ARRAY_SIZE(spare); i++) { ++ if (*sps <= spare[i]) { ++ if (!i) ++ *sps = spare[i]; ++ else if (*sps != spare[i]) ++ *sps = spare[i - 1]; ++ break; ++ } ++ } ++ ++ if (i >= ARRAY_SIZE(spare)) ++ *sps = spare[ARRAY_SIZE(spare) - 1]; ++ ++ if (nand->ecc.size == 1024) ++ *sps <<= 1; ++} ++ ++static int mtk_nfc_ecc_init(struct device *dev, struct mtd_info *mtd) ++{ ++ struct nand_chip *nand = mtd_to_nand(mtd); ++ u32 spare; ++ ++ /* support only ecc hw mode */ ++ if (nand->ecc.mode != NAND_ECC_HW) { ++ dev_err(dev, "ecc.mode not supported\n"); ++ return -EINVAL; ++ } ++ ++ /* if optional DT settings are not present */ ++ if (!nand->ecc.size || !nand->ecc.strength) { ++ ++ /* controller only supports sizes 512 and 1024 */ ++ nand->ecc.size = (mtd->writesize > 512) ? 1024 : 512; ++ ++ /* get controller valid values */ ++ mtk_nfc_set_spare_per_sector(&spare, mtd); ++ spare = spare - NFI_FDM_MAX_SIZE; ++ nand->ecc.strength = (spare << 3) / ECC_PARITY_BITS; ++ } ++ ++ mtk_ecc_update_strength(&nand->ecc.strength); ++ ++ dev_info(dev, "eccsize %d eccstrength %d\n", ++ nand->ecc.size, nand->ecc.strength); ++ ++ return 0; ++} ++ ++static int mtk_nfc_nand_chip_init(struct device *dev, struct mtk_nfc *nfc, ++ struct device_node *np) ++{ ++ struct mtk_nfc_nand_chip *chip; ++ struct nand_chip *nand; ++ struct mtd_info *mtd; ++ int nsels, len; ++ u32 tmp; ++ int ret; ++ int i; ++ ++ if (!of_get_property(np, "reg", &nsels)) ++ return -ENODEV; ++ ++ nsels /= sizeof(u32); ++ if (!nsels || nsels > MTK_NAND_MAX_NSELS) { ++ dev_err(dev, "invalid reg property size %d\n", nsels); ++ return -EINVAL; ++ } ++ ++ chip = devm_kzalloc(dev, ++ sizeof(*chip) + nsels * sizeof(u8), GFP_KERNEL); ++ if (!chip) ++ return -ENOMEM; ++ ++ chip->nsels = nsels; ++ for (i = 0; i < nsels; i++) { ++ ret = of_property_read_u32_index(np, "reg", i, &tmp); ++ if (ret) { ++ dev_err(dev, "reg property failure : %d\n", ret); ++ return ret; ++ } ++ chip->sels[i] = tmp; ++ } ++ ++ nand = &chip->nand; ++ nand->controller = &nfc->controller; ++ ++ nand_set_flash_node(nand, np); ++ nand_set_controller_data(nand, nfc); ++ ++ nand->options |= NAND_USE_BOUNCE_BUFFER | NAND_SUBPAGE_READ; ++ nand->dev_ready = mtk_nfc_dev_ready; ++ nand->select_chip = mtk_nfc_select_chip; ++ nand->write_byte = mtk_nfc_write_byte; ++ nand->write_buf = mtk_nfc_write_buf; ++ nand->read_byte = mtk_nfc_read_byte; ++ nand->read_buf = mtk_nfc_read_buf; ++ nand->cmd_ctrl = mtk_nfc_cmd_ctrl; ++ ++ /* set default mode in case dt entry is missing */ ++ nand->ecc.mode = NAND_ECC_HW; ++ ++ nand->ecc.write_subpage = mtk_nfc_write_subpage_hwecc; ++ nand->ecc.write_page_raw = mtk_nfc_write_page_raw; ++ nand->ecc.write_page = mtk_nfc_write_page_hwecc; ++ nand->ecc.write_oob_raw = mtk_nfc_write_oob_std; ++ nand->ecc.write_oob = mtk_nfc_write_oob_std; ++ ++ nand->ecc.read_subpage = mtk_nfc_read_subpage_hwecc; ++ nand->ecc.read_page_raw = mtk_nfc_read_page_raw; ++ nand->ecc.read_page = mtk_nfc_read_page_hwecc; ++ nand->ecc.read_oob_raw = mtk_nfc_read_oob_std; ++ nand->ecc.read_oob = mtk_nfc_read_oob_std; ++ ++ mtd = nand_to_mtd(nand); ++ mtd->owner = THIS_MODULE; ++ mtd->dev.parent = dev; ++ mtd->name = MTK_NAME; ++ mtd_set_ooblayout(mtd, &mtk_nfc_ooblayout_ops); ++ ++ mtk_nfc_hw_init(nfc); ++ ++ ret = nand_scan_ident(mtd, nsels, NULL); ++ if (ret) ++ return -ENODEV; ++ ++ /* store bbt magic in page, cause OOB is not protected */ ++ if (nand->bbt_options & NAND_BBT_USE_FLASH) ++ nand->bbt_options |= NAND_BBT_NO_OOB; ++ ++ ret = mtk_nfc_ecc_init(dev, mtd); ++ if (ret) ++ return -EINVAL; ++ ++ mtk_nfc_set_spare_per_sector(&chip->spare_per_sector, mtd); ++ mtk_nfc_set_fdm(&chip->fdm, mtd); ++ mtk_nfc_set_bad_mark_ctl(&chip->bad_mark, mtd); ++ ++ len = mtd->writesize + mtd->oobsize; ++ nfc->buffer = devm_kzalloc(dev, len, GFP_KERNEL); ++ if (!nfc->buffer) ++ return -ENOMEM; ++ ++ ret = nand_scan_tail(mtd); ++ if (ret) ++ return -ENODEV; ++ ++ ret = mtd_device_parse_register(mtd, NULL, NULL, NULL, 0); ++ if (ret) { ++ dev_err(dev, "mtd parse partition error\n"); ++ nand_release(mtd); ++ return ret; ++ } ++ ++ list_add_tail(&chip->node, &nfc->chips); ++ ++ return 0; ++} ++ ++static int mtk_nfc_nand_chips_init(struct device *dev, struct mtk_nfc *nfc) ++{ ++ struct device_node *np = dev->of_node; ++ struct device_node *nand_np; ++ int ret; ++ ++ for_each_child_of_node(np, nand_np) { ++ ret = mtk_nfc_nand_chip_init(dev, nfc, nand_np); ++ if (ret) { ++ of_node_put(nand_np); ++ return ret; ++ } ++ } ++ ++ return 0; ++} ++ ++static int mtk_nfc_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct device_node *np = dev->of_node; ++ struct mtk_nfc *nfc; ++ struct resource *res; ++ int ret, irq; ++ ++ nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); ++ if (!nfc) ++ return -ENOMEM; ++ ++ spin_lock_init(&nfc->controller.lock); ++ init_waitqueue_head(&nfc->controller.wq); ++ INIT_LIST_HEAD(&nfc->chips); ++ ++ /* probe defer if not ready */ ++ nfc->ecc = of_mtk_ecc_get(np); ++ if (IS_ERR(nfc->ecc)) ++ return PTR_ERR(nfc->ecc); ++ else if (!nfc->ecc) ++ return -ENODEV; ++ ++ nfc->dev = dev; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ nfc->regs = devm_ioremap_resource(dev, res); ++ if (IS_ERR(nfc->regs)) { ++ ret = PTR_ERR(nfc->regs); ++ dev_err(dev, "no nfi base\n"); ++ goto release_ecc; ++ } ++ ++ nfc->clk.nfi_clk = devm_clk_get(dev, "nfi_clk"); ++ if (IS_ERR(nfc->clk.nfi_clk)) { ++ dev_err(dev, "no clk\n"); ++ ret = PTR_ERR(nfc->clk.nfi_clk); ++ goto release_ecc; ++ } ++ ++ nfc->clk.pad_clk = devm_clk_get(dev, "pad_clk"); ++ if (IS_ERR(nfc->clk.pad_clk)) { ++ dev_err(dev, "no pad clk\n"); ++ ret = PTR_ERR(nfc->clk.pad_clk); ++ goto release_ecc; ++ } ++ ++ ret = mtk_nfc_enable_clk(dev, &nfc->clk); ++ if (ret) ++ goto release_ecc; ++ ++ irq = platform_get_irq(pdev, 0); ++ if (irq < 0) { ++ dev_err(dev, "no nfi irq resource\n"); ++ ret = -EINVAL; ++ goto clk_disable; ++ } ++ ++ ret = devm_request_irq(dev, irq, mtk_nfc_irq, 0x0, "mtk-nand", nfc); ++ if (ret) { ++ dev_err(dev, "failed to request nfi irq\n"); ++ goto clk_disable; ++ } ++ ++ ret = dma_set_mask(dev, DMA_BIT_MASK(32)); ++ if (ret) { ++ dev_err(dev, "failed to set dma mask\n"); ++ goto clk_disable; ++ } ++ ++ platform_set_drvdata(pdev, nfc); ++ ++ ret = mtk_nfc_nand_chips_init(dev, nfc); ++ if (ret) { ++ dev_err(dev, "failed to init nand chips\n"); ++ goto clk_disable; ++ } ++ ++ return 0; ++ ++clk_disable: ++ mtk_nfc_disable_clk(&nfc->clk); ++ ++release_ecc: ++ mtk_ecc_release(nfc->ecc); ++ ++ return ret; ++} ++ ++static int mtk_nfc_remove(struct platform_device *pdev) ++{ ++ struct mtk_nfc *nfc = platform_get_drvdata(pdev); ++ struct mtk_nfc_nand_chip *chip; ++ ++ while (!list_empty(&nfc->chips)) { ++ chip = list_first_entry(&nfc->chips, struct mtk_nfc_nand_chip, ++ node); ++ nand_release(nand_to_mtd(&chip->nand)); ++ list_del(&chip->node); ++ } ++ ++ mtk_ecc_release(nfc->ecc); ++ mtk_nfc_disable_clk(&nfc->clk); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM_SLEEP ++static int mtk_nfc_suspend(struct device *dev) ++{ ++ struct mtk_nfc *nfc = dev_get_drvdata(dev); ++ ++ mtk_nfc_disable_clk(&nfc->clk); ++ ++ return 0; ++} ++ ++static int mtk_nfc_resume(struct device *dev) ++{ ++ struct mtk_nfc *nfc = dev_get_drvdata(dev); ++ struct mtk_nfc_nand_chip *chip; ++ struct nand_chip *nand; ++ struct mtd_info *mtd; ++ int ret; ++ u32 i; ++ ++ udelay(200); ++ ++ ret = mtk_nfc_enable_clk(dev, &nfc->clk); ++ if (ret) ++ return ret; ++ ++ mtk_nfc_hw_init(nfc); ++ ++ list_for_each_entry(chip, &nfc->chips, node) { ++ nand = &chip->nand; ++ mtd = nand_to_mtd(nand); ++ for (i = 0; i < chip->nsels; i++) { ++ nand->select_chip(mtd, i); ++ nand->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); ++ } ++ } ++ ++ return 0; ++} ++static SIMPLE_DEV_PM_OPS(mtk_nfc_pm_ops, mtk_nfc_suspend, mtk_nfc_resume); ++#endif ++ ++static const struct of_device_id mtk_nfc_id_table[] = { ++ { .compatible = "mediatek,mt2701-nfc" }, ++ {} ++}; ++MODULE_DEVICE_TABLE(of, mtk_nfc_id_table); ++ ++static struct platform_driver mtk_nfc_driver = { ++ .probe = mtk_nfc_probe, ++ .remove = mtk_nfc_remove, ++ .driver = { ++ .name = MTK_NAME, ++ .of_match_table = mtk_nfc_id_table, ++#ifdef CONFIG_PM_SLEEP ++ .pm = &mtk_nfc_pm_ops, ++#endif ++ }, ++}; ++ ++module_platform_driver(mtk_nfc_driver); ++ ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Xiaolei Li <xiaolei.li@mediatek.com>"); ++MODULE_AUTHOR("Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>"); ++MODULE_DESCRIPTION("MTK Nand Flash Controller Driver"); |