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5
6#include <linux/device.h>
7#include <linux/io.h>
8#include <linux/ioport.h>
9#include <linux/module.h>
10#include <linux/of.h>
11#include <linux/of_address.h>
12#include <linux/platform_device.h>
13#include <linux/slab.h>
14
15#include "brcmnand.h"
16
17struct bcm63138_nand_soc {
18 struct brcmnand_soc soc;
19 void __iomem *base;
20};
21
22#define BCM63138_NAND_INT_STATUS 0x00
23#define BCM63138_NAND_INT_EN 0x04
24
25enum {
26 BCM63138_CTLRDY = BIT(4),
27};
28
29static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc)
30{
31 struct bcm63138_nand_soc *priv =
32 container_of(soc, struct bcm63138_nand_soc, soc);
33 void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS;
34 u32 val = brcmnand_readl(mmio);
35
36 if (val & BCM63138_CTLRDY) {
37 brcmnand_writel(val & ~BCM63138_CTLRDY, mmio);
38 return true;
39 }
40
41 return false;
42}
43
44static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en)
45{
46 struct bcm63138_nand_soc *priv =
47 container_of(soc, struct bcm63138_nand_soc, soc);
48 void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN;
49 u32 val = brcmnand_readl(mmio);
50
51 if (en)
52 val |= BCM63138_CTLRDY;
53 else
54 val &= ~BCM63138_CTLRDY;
55
56 brcmnand_writel(val, mmio);
57}
58
59static int bcm63138_nand_probe(struct platform_device *pdev)
60{
61 struct device *dev = &pdev->dev;
62 struct bcm63138_nand_soc *priv;
63 struct brcmnand_soc *soc;
64 struct resource *res;
65
66 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
67 if (!priv)
68 return -ENOMEM;
69 soc = &priv->soc;
70
71 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base");
72 priv->base = devm_ioremap_resource(dev, res);
73 if (IS_ERR(priv->base))
74 return PTR_ERR(priv->base);
75
76 soc->ctlrdy_ack = bcm63138_nand_intc_ack;
77 soc->ctlrdy_set_enabled = bcm63138_nand_intc_set;
78
79 return brcmnand_probe(pdev, soc);
80}
81
82static const struct of_device_id bcm63138_nand_of_match[] = {
83 { .compatible = "brcm,nand-bcm63138" },
84 {},
85};
86MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match);
87
88static struct platform_driver bcm63138_nand_driver = {
89 .probe = bcm63138_nand_probe,
90 .remove = brcmnand_remove,
91 .driver = {
92 .name = "bcm63138_nand",
93 .pm = &brcmnand_pm_ops,
94 .of_match_table = bcm63138_nand_of_match,
95 }
96};
97module_platform_driver(bcm63138_nand_driver);
98
99MODULE_LICENSE("GPL v2");
100MODULE_AUTHOR("Brian Norris");
101MODULE_DESCRIPTION("NAND driver for BCM63138");
102
