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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright © 2015 Broadcom Corporation
*/
#include <linux/device.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "brcmnand.h"
struct bcm63138_nand_soc {
struct brcmnand_soc soc;
void __iomem *base;
};
#define BCM63138_NAND_INT_STATUS 0x00
#define BCM63138_NAND_INT_EN 0x04
enum {
BCM63138_CTLRDY = BIT(4),
};
static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc)
{
struct bcm63138_nand_soc *priv =
container_of(soc, struct bcm63138_nand_soc, soc);
void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS;
u32 val = brcmnand_readl(mmio);
if (val & BCM63138_CTLRDY) {
brcmnand_writel(val & ~BCM63138_CTLRDY, mmio);
return true;
}
return false;
}
static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en)
{
struct bcm63138_nand_soc *priv =
container_of(soc, struct bcm63138_nand_soc, soc);
void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN;
u32 val = brcmnand_readl(mmio);
if (en)
val |= BCM63138_CTLRDY;
else
val &= ~BCM63138_CTLRDY;
brcmnand_writel(val, mmio);
}
static int bcm63138_nand_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct bcm63138_nand_soc *priv;
struct brcmnand_soc *soc;
struct resource *res;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
soc = &priv->soc;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base");
priv->base = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
soc->ctlrdy_ack = bcm63138_nand_intc_ack;
soc->ctlrdy_set_enabled = bcm63138_nand_intc_set;
return brcmnand_probe(pdev, soc);
}
static const struct of_device_id bcm63138_nand_of_match[] = {
{ .compatible = "brcm,nand-bcm63138" },
{},
};
MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match);
static struct platform_driver bcm63138_nand_driver = {
.probe = bcm63138_nand_probe,
.remove = brcmnand_remove,
.driver = {
.name = "bcm63138_nand",
.pm = &brcmnand_pm_ops,
.of_match_table = bcm63138_nand_of_match,
}
};
module_platform_driver(bcm63138_nand_driver);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Brian Norris");
MODULE_DESCRIPTION("NAND driver for BCM63138");
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