110 lines
2.7 KiB
C
110 lines
2.7 KiB
C
/*
|
|
* Copyright © 2015 Broadcom Corporation
|
|
*
|
|
* 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/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");
|