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 bcm6368_nand_soc {
15 struct brcmnand_soc soc;
16 void __iomem *base;
17 };
18
19 #define soc_to_priv(_soc) container_of(_soc, struct bcm6368_nand_soc, soc)
20
21 #define BCM6368_NAND_INT 0x00
22 #define BCM6368_NAND_STATUS_SHIFT 0
23 #define BCM6368_NAND_STATUS_MASK (0xfff << BCM6368_NAND_STATUS_SHIFT)
24 #define BCM6368_NAND_ENABLE_SHIFT 16
25 #define BCM6368_NAND_ENABLE_MASK (0xffff << BCM6368_NAND_ENABLE_SHIFT)
26
27 enum {
28 BCM6368_NP_READ = BIT(0),
29 BCM6368_BLOCK_ERASE = BIT(1),
30 BCM6368_COPY_BACK = BIT(2),
31 BCM6368_PAGE_PGM = BIT(3),
32 BCM6368_CTRL_READY = BIT(4),
33 BCM6368_DEV_RBPIN = BIT(5),
34 BCM6368_ECC_ERR_UNC = BIT(6),
35 BCM6368_ECC_ERR_CORR = BIT(7),
36 };
37
bcm6368_nand_intc_ack(struct brcmnand_soc * soc)38 static bool bcm6368_nand_intc_ack(struct brcmnand_soc *soc)
39 {
40 struct bcm6368_nand_soc *priv = soc_to_priv(soc);
41 void __iomem *mmio = priv->base + BCM6368_NAND_INT;
42 u32 val = brcmnand_readl(mmio);
43
44 if (val & (BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT)) {
45 /* Ack interrupt */
46 val &= ~BCM6368_NAND_STATUS_MASK;
47 val |= BCM6368_CTRL_READY << BCM6368_NAND_STATUS_SHIFT;
48 brcmnand_writel(val, mmio);
49 return true;
50 }
51
52 return false;
53 }
54
bcm6368_nand_intc_set(struct brcmnand_soc * soc,bool en)55 static void bcm6368_nand_intc_set(struct brcmnand_soc *soc, bool en)
56 {
57 struct bcm6368_nand_soc *priv = soc_to_priv(soc);
58 void __iomem *mmio = priv->base + BCM6368_NAND_INT;
59 u32 val = brcmnand_readl(mmio);
60
61 /* Don't ack any interrupts */
62 val &= ~BCM6368_NAND_STATUS_MASK;
63
64 if (en)
65 val |= BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT;
66 else
67 val &= ~(BCM6368_CTRL_READY << BCM6368_NAND_ENABLE_SHIFT);
68
69 brcmnand_writel(val, mmio);
70 }
71
bcm6368_nand_probe(struct udevice * dev)72 static int bcm6368_nand_probe(struct udevice *dev)
73 {
74 struct bcm6368_nand_soc *priv = dev_get_priv(dev);
75 struct brcmnand_soc *soc = &priv->soc;
76
77 priv->base = dev_remap_addr_name(dev, "nand-int-base");
78 if (!priv->base)
79 return -EINVAL;
80
81 soc->ctlrdy_ack = bcm6368_nand_intc_ack;
82 soc->ctlrdy_set_enabled = bcm6368_nand_intc_set;
83
84 /* Disable and ack all interrupts */
85 brcmnand_writel(0, priv->base + BCM6368_NAND_INT);
86 brcmnand_writel(BCM6368_NAND_STATUS_MASK,
87 priv->base + BCM6368_NAND_INT);
88
89 return brcmnand_probe(dev, soc);
90 }
91
92 static const struct udevice_id bcm6368_nand_dt_ids[] = {
93 {
94 .compatible = "brcm,nand-bcm6368",
95 },
96 { /* sentinel */ }
97 };
98
99 U_BOOT_DRIVER(bcm6368_nand) = {
100 .name = "bcm6368-nand",
101 .id = UCLASS_MTD,
102 .of_match = bcm6368_nand_dt_ids,
103 .probe = bcm6368_nand_probe,
104 .priv_auto_alloc_size = sizeof(struct bcm6368_nand_soc),
105 };
106
board_nand_init(void)107 void board_nand_init(void)
108 {
109 struct udevice *dev;
110 int ret;
111
112 ret = uclass_get_device_by_driver(UCLASS_MTD,
113 DM_GET_DRIVER(bcm6368_nand), &dev);
114 if (ret && ret != -ENODEV)
115 pr_err("Failed to initialize %s. (error %d)\n", dev->name,
116 ret);
117 }
118