diff options
author | Brian Norris <computersforpeace@gmail.com> | 2015-05-12 19:13:14 (GMT) |
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committer | Brian Norris <computersforpeace@gmail.com> | 2015-05-15 20:20:00 (GMT) |
commit | f628ece6636c2f0354a52566cafdea6d2f963b3d (patch) | |
tree | 6312f54b5186f6e947a2f25ba1d1138d4ffe4315 /drivers/mtd/nand/brcmnand | |
parent | ca22f040dd145fc4d8069ce174f6eb0bc3ebd19f (diff) | |
download | linux-f628ece6636c2f0354a52566cafdea6d2f963b3d.tar.xz |
mtd: brcmnand: add BCM63138 support
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'drivers/mtd/nand/brcmnand')
-rw-r--r-- | drivers/mtd/nand/brcmnand/Makefile | 1 | ||||
-rw-r--r-- | drivers/mtd/nand/brcmnand/bcm63138_nand.c | 111 |
2 files changed, 112 insertions, 0 deletions
diff --git a/drivers/mtd/nand/brcmnand/Makefile b/drivers/mtd/nand/brcmnand/Makefile index 4e1e65e..3b1fbfd 100644 --- a/drivers/mtd/nand/brcmnand/Makefile +++ b/drivers/mtd/nand/brcmnand/Makefile @@ -1,5 +1,6 @@ # link order matters; don't link the more generic brcmstb_nand.o before the # more specific iproc_nand.o, for instance obj-$(CONFIG_MTD_NAND_BRCMNAND) += iproc_nand.o +obj-$(CONFIG_MTD_NAND_BRCMNAND) += bcm63138_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmstb_nand.o obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand.o diff --git a/drivers/mtd/nand/brcmnand/bcm63138_nand.c b/drivers/mtd/nand/brcmnand/bcm63138_nand.c new file mode 100644 index 0000000..3f4c44c --- /dev/null +++ b/drivers/mtd/nand/brcmnand/bcm63138_nand.c @@ -0,0 +1,111 @@ +/* + * 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_priv { + 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 *priv = soc->priv; + 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 *priv = soc->priv; + 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 *priv; + struct brcmnand_soc *soc; + struct resource *res; + + soc = devm_kzalloc(dev, sizeof(*soc), GFP_KERNEL); + if (!soc) + return -ENOMEM; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + 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->pdev = pdev; + soc->priv = priv; + 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"); |