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- // SPDX-License-Identifier: GPL-2.0+
- #include <common.h>
- #include <asm/io.h>
- #include <memalign.h>
- #include <nand.h>
- #include <linux/bitops.h>
- #include <linux/errno.h>
- #include <linux/io.h>
- #include <linux/ioport.h>
- #include <dm.h>
- #include "brcmnand.h"
- struct bcm6368_nand_soc {
- struct brcmnand_soc soc;
- void __iomem *base;
- };
- #define soc_to_priv(_soc) container_of(_soc, struct bcm6368_nand_soc, soc)
- #define BCM6368_NAND_INT 0x00
- #define BCM6368_NAND_STATUS_SHIFT 0
- #define BCM6368_NAND_STATUS_MASK (0xfff << BCM6368_NAND_STATUS_SHIFT)
- #define BCM6368_NAND_ENABLE_SHIFT 16
- #define BCM6368_NAND_ENABLE_MASK (0xffff << BCM6368_NAND_ENABLE_SHIFT)
- enum {
- BCM6368_NP_READ = BIT(0),
- BCM6368_BLOCK_ERASE = BIT(1),
- BCM6368_COPY_BACK = BIT(2),
- BCM6368_PAGE_PGM = BIT(3),
- BCM6368_CTRL_READY = BIT(4),
- BCM6368_DEV_RBPIN = BIT(5),
- BCM6368_ECC_ERR_UNC = BIT(6),
- BCM6368_ECC_ERR_CORR = BIT(7),
- };
- static bool bcm6368_nand_intc_ack(struct brcmnand_soc *soc)
- {
- struct bcm6368_nand_soc *priv = soc_to_priv(soc);
- void __iomem *mmio = priv->base + BCM6368_NAND_INT;
- u32 val = brcmnand_readl(mmio);
- if (val & (BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT)) {
- /* Ack interrupt */
- val &= ~BCM6368_NAND_STATUS_MASK;
- val |= BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT;
- brcmnand_writel(val, mmio);
- return true;
- }
- return false;
- }
- static void bcm6368_nand_intc_set(struct brcmnand_soc *soc, bool en)
- {
- struct bcm6368_nand_soc *priv = soc_to_priv(soc);
- void __iomem *mmio = priv->base + BCM6368_NAND_INT;
- u32 val = brcmnand_readl(mmio);
- /* Don't ack any interrupts */
- val &= ~BCM6368_NAND_STATUS_MASK;
- if (en)
- val |= BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT;
- else
- val &= ~(BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT);
- brcmnand_writel(val, mmio);
- }
- static int bcm6368_nand_probe(struct udevice *dev)
- {
- struct bcm6368_nand_soc *priv = dev_get_priv(dev);
- struct brcmnand_soc *soc = &priv->soc;
- priv->base = dev_remap_addr_name(dev, "nand-int-base");
- if (!priv->base)
- return -EINVAL;
- soc->ctlrdy_ack = bcm6368_nand_intc_ack;
- soc->ctlrdy_set_enabled = bcm6368_nand_intc_set;
- /* Disable and ack all interrupts */
- brcmnand_writel(0, priv->base + BCM6368_NAND_INT);
- brcmnand_writel(BCM6368_NAND_STATUS_MASK,
- priv->base + BCM6368_NAND_INT);
- return brcmnand_probe(dev, soc);
- }
- static const struct udevice_id bcm6368_nand_dt_ids[] = {
- {
- .compatible = "brcm,nand-bcm6368",
- },
- { /* sentinel */ }
- };
- U_BOOT_DRIVER(bcm6368_nand) = {
- .name = "bcm6368-nand",
- .id = UCLASS_MTD,
- .of_match = bcm6368_nand_dt_ids,
- .probe = bcm6368_nand_probe,
- .priv_auto = sizeof(struct bcm6368_nand_soc),
- };
- void board_nand_init(void)
- {
- struct udevice *dev;
- int ret;
- ret = uclass_get_device_by_driver(UCLASS_MTD,
- DM_DRIVER_GET(bcm6368_nand), &dev);
- if (ret && ret != -ENODEV)
- pr_err("Failed to initialize %s. (error %d)\n", dev->name,
- ret);
- }
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