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nand: brcm: add BCM6368 support

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This adds support for BCM6368, BCM6328, BCM6362 and BCM63268 SoCs.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Álvaro Fernández Rojas 2019-08-28 19:12:15 +02:00 committed by Daniel Schwierzeck
parent 22247c63ac
commit a9f80cf9ad
3 changed files with 124 additions and 0 deletions
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6
drivers/mtd/nand/raw/Kconfig
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@ -72,6 +72,12 @@ config NAND_BRCMNAND
Enable the driver for NAND flash on platforms using a Broadcom NAND
controller.
config NAND_BRCMNAND_6368
bool "Support Broadcom NAND controller on bcm6368"
depends on NAND_BRCMNAND && ARCH_BMIPS
help
Enable support for broadcom nand driver on bcm6368.
config NAND_BRCMNAND_6838
bool "Support Broadcom NAND controller on bcm6838"
depends on NAND_BRCMNAND && ARCH_BMIPS && SOC_BMIPS_BCM6838

1
drivers/mtd/nand/raw/brcmnand/Makefile
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@ -1,5 +1,6 @@
# SPDX-License-Identifier: GPL-2.0+
obj-$(CONFIG_NAND_BRCMNAND_6368) += bcm6368_nand.o
obj-$(CONFIG_NAND_BRCMNAND_63158) += bcm63158_nand.o
obj-$(CONFIG_NAND_BRCMNAND_6838) += bcm6838_nand.o
obj-$(CONFIG_NAND_BRCMNAND_6858) += bcm6858_nand.o

117
drivers/mtd/nand/raw/brcmnand/bcm6368_nand.c Normal file
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@ -0,0 +1,117 @@
// SPDX-License-Identifier: GPL-2.0+
#include <common.h>
#include <asm/io.h>
#include <memalign.h>
#include <nand.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <dm.h>
#include "brcmnand.h"
struct bcm6368_nand_soc {
struct brcmnand_soc soc;
void __iomem *base;
};
#define soc_to_priv(_soc) container_of(_soc, struct bcm6368_nand_soc, soc)
#define BCM6368_NAND_INT 0x00
#define BCM6368_NAND_STATUS_SHIFT 0
#define BCM6368_NAND_STATUS_MASK (0xfff << BCM6368_NAND_STATUS_SHIFT)
#define BCM6368_NAND_ENABLE_SHIFT 16
#define BCM6368_NAND_ENABLE_MASK (0xffff << BCM6368_NAND_ENABLE_SHIFT)
enum {
BCM6368_NP_READ = BIT(0),
BCM6368_BLOCK_ERASE = BIT(1),
BCM6368_COPY_BACK = BIT(2),
BCM6368_PAGE_PGM = BIT(3),
BCM6368_CTRL_READY = BIT(4),
BCM6368_DEV_RBPIN = BIT(5),
BCM6368_ECC_ERR_UNC = BIT(6),
BCM6368_ECC_ERR_CORR = BIT(7),
};
static bool bcm6368_nand_intc_ack(struct brcmnand_soc *soc)
{
struct bcm6368_nand_soc *priv = soc_to_priv(soc);
void __iomem *mmio = priv->base + BCM6368_NAND_INT;
u32 val = brcmnand_readl(mmio);
if (val & (BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT)) {
/* Ack interrupt */
val &= ~BCM6368_NAND_STATUS_MASK;
val |= BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT;
brcmnand_writel(val, mmio);
return true;
}
return false;
}
static void bcm6368_nand_intc_set(struct brcmnand_soc *soc, bool en)
{
struct bcm6368_nand_soc *priv = soc_to_priv(soc);
void __iomem *mmio = priv->base + BCM6368_NAND_INT;
u32 val = brcmnand_readl(mmio);
/* Don't ack any interrupts */
val &= ~BCM6368_NAND_STATUS_MASK;
if (en)
val |= BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT;
else
val &= ~(BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT);
brcmnand_writel(val, mmio);
}
static int bcm6368_nand_probe(struct udevice *dev)
{
struct bcm6368_nand_soc *priv = dev_get_priv(dev);
struct brcmnand_soc *soc = &priv->soc;
priv->base = dev_remap_addr_name(dev, "nand-int-base");
if (!priv->base)
return -EINVAL;
soc->ctlrdy_ack = bcm6368_nand_intc_ack;
soc->ctlrdy_set_enabled = bcm6368_nand_intc_set;
/* Disable and ack all interrupts */
brcmnand_writel(0, priv->base + BCM6368_NAND_INT);
brcmnand_writel(BCM6368_NAND_STATUS_MASK,
priv->base + BCM6368_NAND_INT);
return brcmnand_probe(dev, soc);
}
static const struct udevice_id bcm6368_nand_dt_ids[] = {
{
.compatible = "brcm,nand-bcm6368",
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(bcm6368_nand) = {
.name = "bcm6368-nand",
.id = UCLASS_MTD,
.of_match = bcm6368_nand_dt_ids,
.probe = bcm6368_nand_probe,
.priv_auto_alloc_size = sizeof(struct bcm6368_nand_soc),
};
void board_nand_init(void)
{
struct udevice *dev;
int ret;
ret = uclass_get_device_by_driver(UCLASS_MTD,
DM_GET_DRIVER(bcm6368_nand), &dev);
if (ret && ret != -ENODEV)
pr_err("Failed to initialize %s. (error %d)\n", dev->name,
ret);
}