// 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; struct resource *res; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; soc = &priv->soc; 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->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");