diff options
Diffstat (limited to 'drivers/mtd/nand/raw/brcmnand/bcm63138_nand.c')
-rw-r--r-- | drivers/mtd/nand/raw/brcmnand/bcm63138_nand.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/brcmnand/bcm63138_nand.c b/drivers/mtd/nand/raw/brcmnand/bcm63138_nand.c new file mode 100644 index 0000000000..9596629000 --- /dev/null +++ b/drivers/mtd/nand/raw/brcmnand/bcm63138_nand.c @@ -0,0 +1,99 @@ +// 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; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + soc = &priv->soc; + + priv->base = devm_platform_ioremap_resource_byname(pdev, "nand-int-base"); + 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"); |