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101 lines
2.3 KiB
101 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright © 2015 Broadcom Corporation |
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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 { |
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struct brcmnand_soc soc; |
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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 = |
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container_of(soc, struct bcm63138_nand_soc, soc); |
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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 = |
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container_of(soc, struct bcm63138_nand_soc, soc); |
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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; |
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struct brcmnand_soc *soc; |
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struct resource *res; |
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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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soc = &priv->soc; |
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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->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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