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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/err.h>
- #include <linux/errno.h>
- #include <linux/io.h>
- #include <linux/ioport.h>
- #include <dm.h>
- #include "brcmnand.h"
- struct bcm6838_nand_soc {
- struct brcmnand_soc soc;
- void __iomem *base;
- };
- #define BCM6838_NAND_INT 0x00
- #define BCM6838_NAND_STATUS_SHIFT 0
- #define BCM6838_NAND_STATUS_MASK (0xfff << BCM6838_NAND_STATUS_SHIFT)
- #define BCM6838_NAND_ENABLE_SHIFT 16
- #define BCM6838_NAND_ENABLE_MASK (0xffff << BCM6838_NAND_ENABLE_SHIFT)
- enum {
- BCM6838_NP_READ = BIT(0),
- BCM6838_BLOCK_ERASE = BIT(1),
- BCM6838_COPY_BACK = BIT(2),
- BCM6838_PAGE_PGM = BIT(3),
- BCM6838_CTRL_READY = BIT(4),
- BCM6838_DEV_RBPIN = BIT(5),
- BCM6838_ECC_ERR_UNC = BIT(6),
- BCM6838_ECC_ERR_CORR = BIT(7),
- };
- static bool bcm6838_nand_intc_ack(struct brcmnand_soc *soc)
- {
- struct bcm6838_nand_soc *priv =
- container_of(soc, struct bcm6838_nand_soc, soc);
- void __iomem *mmio = priv->base + BCM6838_NAND_INT;
- u32 val = brcmnand_readl(mmio);
- if (val & (BCM6838_CTRL_READY << BCM6838_NAND_STATUS_SHIFT)) {
- /* Ack interrupt */
- val &= ~BCM6838_NAND_STATUS_MASK;
- val |= BCM6838_CTRL_READY << BCM6838_NAND_STATUS_SHIFT;
- brcmnand_writel(val, mmio);
- return true;
- }
- return false;
- }
- static void bcm6838_nand_intc_set(struct brcmnand_soc *soc, bool en)
- {
- struct bcm6838_nand_soc *priv =
- container_of(soc, struct bcm6838_nand_soc, soc);
- void __iomem *mmio = priv->base + BCM6838_NAND_INT;
- u32 val = brcmnand_readl(mmio);
- /* Don't ack any interrupts */
- val &= ~BCM6838_NAND_STATUS_MASK;
- if (en)
- val |= BCM6838_CTRL_READY << BCM6838_NAND_ENABLE_SHIFT;
- else
- val &= ~(BCM6838_CTRL_READY << BCM6838_NAND_ENABLE_SHIFT);
- brcmnand_writel(val, mmio);
- }
- static int bcm6838_nand_probe(struct udevice *dev)
- {
- struct udevice *pdev = dev;
- struct bcm6838_nand_soc *priv = dev_get_priv(dev);
- struct brcmnand_soc *soc;
- struct resource res;
- soc = &priv->soc;
- dev_read_resource_byname(pdev, "nand-int-base", &res);
- priv->base = ioremap(res.start, resource_size(&res));
- if (IS_ERR(priv->base))
- return PTR_ERR(priv->base);
- soc->ctlrdy_ack = bcm6838_nand_intc_ack;
- soc->ctlrdy_set_enabled = bcm6838_nand_intc_set;
- /* Disable and ack all interrupts */
- brcmnand_writel(0, priv->base + BCM6838_NAND_INT);
- brcmnand_writel(BCM6838_NAND_STATUS_MASK,
- priv->base + BCM6838_NAND_INT);
- return brcmnand_probe(pdev, soc);
- }
- static const struct udevice_id bcm6838_nand_dt_ids[] = {
- {
- .compatible = "brcm,nand-bcm6838",
- },
- { /* sentinel */ }
- };
- U_BOOT_DRIVER(bcm6838_nand) = {
- .name = "bcm6838-nand",
- .id = UCLASS_MTD,
- .of_match = bcm6838_nand_dt_ids,
- .probe = bcm6838_nand_probe,
- .priv_auto_alloc_size = sizeof(struct bcm6838_nand_soc),
- };
- void board_nand_init(void)
- {
- struct udevice *dev;
- int ret;
- ret = uclass_get_device_by_driver(UCLASS_MTD,
- DM_GET_DRIVER(bcm6838_nand), &dev);
- if (ret && ret != -ENODEV)
- pr_err("Failed to initialize %s. (error %d)\n", dev->name,
- ret);
- }
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