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// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <asm/io.h>
#include <memalign.h>
#include <nand.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <dm.h>
#include "brcmnand.h"
struct bcm6838_nand_soc {
struct brcmnand_soc soc;
void __iomem *base;
};
#define BCM6838_NAND_INT 0x00
#define BCM6838_NAND_STATUS_SHIFT 0
#define BCM6838_NAND_STATUS_MASK (0xfff << BCM6838_NAND_STATUS_SHIFT)
#define BCM6838_NAND_ENABLE_SHIFT 16
#define BCM6838_NAND_ENABLE_MASK (0xffff << BCM6838_NAND_ENABLE_SHIFT)
enum {
BCM6838_NP_READ = BIT(0),
BCM6838_BLOCK_ERASE = BIT(1),
BCM6838_COPY_BACK = BIT(2),
BCM6838_PAGE_PGM = BIT(3),
BCM6838_CTRL_READY = BIT(4),
BCM6838_DEV_RBPIN = BIT(5),
BCM6838_ECC_ERR_UNC = BIT(6),
BCM6838_ECC_ERR_CORR = BIT(7),
};
static bool bcm6838_nand_intc_ack(struct brcmnand_soc *soc)
{
struct bcm6838_nand_soc *priv =
container_of(soc, struct bcm6838_nand_soc, soc);
void __iomem *mmio = priv->base + BCM6838_NAND_INT;
u32 val = brcmnand_readl(mmio);
if (val & (BCM6838_CTRL_READY << BCM6838_NAND_STATUS_SHIFT)) {
/* Ack interrupt */
val &= ~BCM6838_NAND_STATUS_MASK;
val |= BCM6838_CTRL_READY << BCM6838_NAND_STATUS_SHIFT;
brcmnand_writel(val, mmio);
return true;
}
return false;
}
static void bcm6838_nand_intc_set(struct brcmnand_soc *soc, bool en)
{
struct bcm6838_nand_soc *priv =
container_of(soc, struct bcm6838_nand_soc, soc);
void __iomem *mmio = priv->base + BCM6838_NAND_INT;
u32 val = brcmnand_readl(mmio);
/* Don't ack any interrupts */
val &= ~BCM6838_NAND_STATUS_MASK;
if (en)
val |= BCM6838_CTRL_READY << BCM6838_NAND_ENABLE_SHIFT;
else
val &= ~(BCM6838_CTRL_READY << BCM6838_NAND_ENABLE_SHIFT);
brcmnand_writel(val, mmio);
}
static int bcm6838_nand_probe(struct udevice *dev)
{
struct udevice *pdev = dev;
struct bcm6838_nand_soc *priv = dev_get_priv(dev);
struct brcmnand_soc *soc;
struct resource res;
soc = &priv->soc;
dev_read_resource_byname(pdev, "nand-int-base", &res);
priv->base = ioremap(res.start, resource_size(&res));
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
soc->ctlrdy_ack = bcm6838_nand_intc_ack;
soc->ctlrdy_set_enabled = bcm6838_nand_intc_set;
/* Disable and ack all interrupts */
brcmnand_writel(0, priv->base + BCM6838_NAND_INT);
brcmnand_writel(BCM6838_NAND_STATUS_MASK,
priv->base + BCM6838_NAND_INT);
return brcmnand_probe(pdev, soc);
}
static const struct udevice_id bcm6838_nand_dt_ids[] = {
{
.compatible = "brcm,nand-bcm6838",
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(bcm6838_nand) = {
.name = "bcm6838-nand",
.id = UCLASS_MTD,
.of_match = bcm6838_nand_dt_ids,
.probe = bcm6838_nand_probe,
.priv_auto = sizeof(struct bcm6838_nand_soc),
};
void board_nand_init(void)
{
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_GET_DRIVER(bcm6838_nand), &dev);
if (ret && ret != -ENODEV)
pr_err("Failed to initialize %s. (error %d)\n", dev->name,
ret);
}
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