drivers/mtd/nand/raw/brcmnand/bcm63158_nand.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2
   3 #include <common.h>
   4 #include <asm/io.h>
   5 #include <memalign.h>
   6 #include <nand.h>
   7 #include <linux/errno.h>
   8 #include <linux/io.h>
   9 #include <linux/ioport.h>
  10 #include <dm.h>
  11
  12 #include "brcmnand.h"
  13
  14 struct bcm63158_nand_soc {
  15         struct brcmnand_soc soc;
  16         void __iomem *base;
  17 };
  18
  19 #define BCM63158_NAND_INT               0x00
  20 #define BCM63158_NAND_STATUS_SHIFT      0
  21 #define BCM63158_NAND_STATUS_MASK       (0xfff << BCM63158_NAND_STATUS_SHIFT)
  22
  23 #define BCM63158_NAND_INT_EN            0x04
  24 #define BCM63158_NAND_ENABLE_SHIFT      0
  25 #define BCM63158_NAND_ENABLE_MASK       (0xffff << BCM63158_NAND_ENABLE_SHIFT)
  26
  27 enum {
  28         BCM63158_NP_READ                = BIT(0),
  29         BCM63158_BLOCK_ERASE    = BIT(1),
  30         BCM63158_COPY_BACK      = BIT(2),
  31         BCM63158_PAGE_PGM       = BIT(3),
  32         BCM63158_CTRL_READY     = BIT(4),
  33         BCM63158_DEV_RBPIN      = BIT(5),
  34         BCM63158_ECC_ERR_UNC    = BIT(6),
  35         BCM63158_ECC_ERR_CORR   = BIT(7),
  36 };
  37
  38 static bool bcm63158_nand_intc_ack(struct brcmnand_soc *soc)
  39 {
  40         struct bcm63158_nand_soc *priv =
  41                         container_of(soc, struct bcm63158_nand_soc, soc);
  42         void __iomem *mmio = priv->base + BCM63158_NAND_INT;
  43         u32 val = brcmnand_readl(mmio);
  44
  45         if (val & (BCM63158_CTRL_READY << BCM63158_NAND_STATUS_SHIFT)) {
  46                 /* Ack interrupt */
  47                 val &= ~BCM63158_NAND_STATUS_MASK;
  48                 val |= BCM63158_CTRL_READY << BCM63158_NAND_STATUS_SHIFT;
  49                 brcmnand_writel(val, mmio);
  50                 return true;
  51         }
  52
  53         return false;
  54 }
  55
  56 static void bcm63158_nand_intc_set(struct brcmnand_soc *soc, bool en)
  57 {
  58         struct bcm63158_nand_soc *priv =
  59                         container_of(soc, struct bcm63158_nand_soc, soc);
  60         void __iomem *mmio = priv->base + BCM63158_NAND_INT_EN;
  61         u32 val = brcmnand_readl(mmio);
  62
  63         /* Don't ack any interrupts */
  64         val &= ~BCM63158_NAND_STATUS_MASK;
  65
  66         if (en)
  67                 val |= BCM63158_CTRL_READY << BCM63158_NAND_ENABLE_SHIFT;
  68         else
  69                 val &= ~(BCM63158_CTRL_READY << BCM63158_NAND_ENABLE_SHIFT);
  70
  71         brcmnand_writel(val, mmio);
  72 }
  73
  74 static int bcm63158_nand_probe(struct udevice *dev)
  75 {
  76         struct udevice *pdev = dev;
  77         struct bcm63158_nand_soc *priv = dev_get_priv(dev);
  78         struct brcmnand_soc *soc;
  79         struct resource res;
  80
  81         soc = &priv->soc;
  82
  83         dev_read_resource_byname(pdev, "nand-int-base", &res);
  84         priv->base = devm_ioremap(dev, res.start, resource_size(&res));
  85         if (IS_ERR(priv->base))
  86                 return PTR_ERR(priv->base);
  87
  88         soc->ctlrdy_ack = bcm63158_nand_intc_ack;
  89         soc->ctlrdy_set_enabled = bcm63158_nand_intc_set;
  90
  91         /* Disable and ack all interrupts  */
  92         brcmnand_writel(0, priv->base + BCM63158_NAND_INT_EN);
  93         brcmnand_writel(0, priv->base + BCM63158_NAND_INT);
  94
  95         return brcmnand_probe(pdev, soc);
  96 }
  97
  98 static const struct udevice_id bcm63158_nand_dt_ids[] = {
  99         {
 100                 .compatible = "brcm,nand-bcm63158",
 101         },
 102         { /* sentinel */ }
 103 };
 104
 105 U_BOOT_DRIVER(bcm63158_nand) = {
 106         .name = "bcm63158-nand",
 107         .id = UCLASS_MTD,
 108         .of_match = bcm63158_nand_dt_ids,
 109         .probe = bcm63158_nand_probe,
 110         .priv_auto_alloc_size = sizeof(struct bcm63158_nand_soc),
 111 };
 112
 113 void board_nand_init(void)
 114 {
 115         struct udevice *dev;
 116         int ret;
 117
 118         ret = uclass_get_device_by_driver(UCLASS_MTD,
 119                                           DM_GET_DRIVER(bcm63158_nand), &dev);
 120         if (ret && ret != -ENODEV)
 121                 pr_err("Failed to initialize %s. (error %d)\n", dev->name,
 122                        ret);
 123 }