mirror of https://gitee.com/openkylin/linux.git
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
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/*
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* Copyright © 2015 Broadcom Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include "brcmnand.h"
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struct bcm63138_nand_soc_priv {
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void __iomem *base;
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};
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#define BCM63138_NAND_INT_STATUS 0x00
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#define BCM63138_NAND_INT_EN 0x04
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enum {
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BCM63138_CTLRDY = BIT(4),
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};
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static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc)
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{
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struct bcm63138_nand_soc_priv *priv = soc->priv;
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void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS;
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u32 val = brcmnand_readl(mmio);
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if (val & BCM63138_CTLRDY) {
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brcmnand_writel(val & ~BCM63138_CTLRDY, mmio);
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return true;
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}
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return false;
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}
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static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en)
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{
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struct bcm63138_nand_soc_priv *priv = soc->priv;
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void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN;
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u32 val = brcmnand_readl(mmio);
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if (en)
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val |= BCM63138_CTLRDY;
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else
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val &= ~BCM63138_CTLRDY;
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brcmnand_writel(val, mmio);
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}
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static int bcm63138_nand_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct bcm63138_nand_soc_priv *priv;
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struct brcmnand_soc *soc;
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struct resource *res;
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soc = devm_kzalloc(dev, sizeof(*soc), GFP_KERNEL);
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if (!soc)
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return -ENOMEM;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base");
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priv->base = devm_ioremap_resource(dev, res);
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if (IS_ERR(priv->base))
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return PTR_ERR(priv->base);
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soc->pdev = pdev;
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soc->priv = priv;
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soc->ctlrdy_ack = bcm63138_nand_intc_ack;
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soc->ctlrdy_set_enabled = bcm63138_nand_intc_set;
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return brcmnand_probe(pdev, soc);
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}
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static const struct of_device_id bcm63138_nand_of_match[] = {
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{ .compatible = "brcm,nand-bcm63138" },
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{},
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};
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MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match);
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static struct platform_driver bcm63138_nand_driver = {
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.probe = bcm63138_nand_probe,
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.remove = brcmnand_remove,
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.driver = {
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.name = "bcm63138_nand",
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.pm = &brcmnand_pm_ops,
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.of_match_table = bcm63138_nand_of_match,
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}
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};
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module_platform_driver(bcm63138_nand_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Brian Norris");
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MODULE_DESCRIPTION("NAND driver for BCM63138");
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