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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright 2015 Simon Arlott4 *5 * Derived from bcm63138_nand.c:6 * Copyright © 2015 Broadcom Corporation7 *8 * Derived from bcm963xx_4.12L.06B_consumer/shared/opensource/include/bcm963xx/63268_map_part.h:9 * Copyright 2000-2010 Broadcom Corporation10 *11 * Derived from bcm963xx_4.12L.06B_consumer/shared/opensource/flash/nandflash.c:12 * Copyright 2000-2010 Broadcom Corporation13 */14 15#include <linux/device.h>16#include <linux/io.h>17#include <linux/ioport.h>18#include <linux/module.h>19#include <linux/of.h>20#include <linux/of_address.h>21#include <linux/platform_device.h>22#include <linux/slab.h>23 24#include "brcmnand.h"25 26struct bcm6368_nand_soc {27 struct brcmnand_soc soc;28 void __iomem *base;29};30 31#define BCM6368_NAND_INT 0x0032#define BCM6368_NAND_STATUS_SHIFT 033#define BCM6368_NAND_STATUS_MASK (0xfff << BCM6368_NAND_STATUS_SHIFT)34#define BCM6368_NAND_ENABLE_SHIFT 1635#define BCM6368_NAND_ENABLE_MASK (0xffff << BCM6368_NAND_ENABLE_SHIFT)36#define BCM6368_NAND_BASE_ADDR0 0x0437#define BCM6368_NAND_BASE_ADDR1 0x0c38 39enum {40 BCM6368_NP_READ = BIT(0),41 BCM6368_BLOCK_ERASE = BIT(1),42 BCM6368_COPY_BACK = BIT(2),43 BCM6368_PAGE_PGM = BIT(3),44 BCM6368_CTRL_READY = BIT(4),45 BCM6368_DEV_RBPIN = BIT(5),46 BCM6368_ECC_ERR_UNC = BIT(6),47 BCM6368_ECC_ERR_CORR = BIT(7),48};49 50static bool bcm6368_nand_intc_ack(struct brcmnand_soc *soc)51{52 struct bcm6368_nand_soc *priv =53 container_of(soc, struct bcm6368_nand_soc, soc);54 void __iomem *mmio = priv->base + BCM6368_NAND_INT;55 u32 val = brcmnand_readl(mmio);56 57 if (val & (BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT)) {58 /* Ack interrupt */59 val &= ~BCM6368_NAND_STATUS_MASK;60 val |= BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT;61 brcmnand_writel(val, mmio);62 return true;63 }64 65 return false;66}67 68static void bcm6368_nand_intc_set(struct brcmnand_soc *soc, bool en)69{70 struct bcm6368_nand_soc *priv =71 container_of(soc, struct bcm6368_nand_soc, soc);72 void __iomem *mmio = priv->base + BCM6368_NAND_INT;73 u32 val = brcmnand_readl(mmio);74 75 /* Don't ack any interrupts */76 val &= ~BCM6368_NAND_STATUS_MASK;77 78 if (en)79 val |= BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT;80 else81 val &= ~(BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT);82 83 brcmnand_writel(val, mmio);84}85 86static int bcm6368_nand_probe(struct platform_device *pdev)87{88 struct device *dev = &pdev->dev;89 struct bcm6368_nand_soc *priv;90 struct brcmnand_soc *soc;91 92 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);93 if (!priv)94 return -ENOMEM;95 soc = &priv->soc;96 97 priv->base = devm_platform_ioremap_resource_byname(pdev, "nand-int-base");98 if (IS_ERR(priv->base))99 return PTR_ERR(priv->base);100 101 soc->ctlrdy_ack = bcm6368_nand_intc_ack;102 soc->ctlrdy_set_enabled = bcm6368_nand_intc_set;103 104 /* Disable and ack all interrupts */105 brcmnand_writel(0, priv->base + BCM6368_NAND_INT);106 brcmnand_writel(BCM6368_NAND_STATUS_MASK,107 priv->base + BCM6368_NAND_INT);108 109 return brcmnand_probe(pdev, soc);110}111 112static const struct of_device_id bcm6368_nand_of_match[] = {113 { .compatible = "brcm,nand-bcm6368" },114 {},115};116MODULE_DEVICE_TABLE(of, bcm6368_nand_of_match);117 118static struct platform_driver bcm6368_nand_driver = {119 .probe = bcm6368_nand_probe,120 .remove_new = brcmnand_remove,121 .driver = {122 .name = "bcm6368_nand",123 .pm = &brcmnand_pm_ops,124 .of_match_table = bcm6368_nand_of_match,125 }126};127module_platform_driver(bcm6368_nand_driver);128 129MODULE_LICENSE("GPL");130MODULE_AUTHOR("Simon Arlott");131MODULE_DESCRIPTION("NAND driver for BCM6368");132