1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright © 2015 Broadcom Corporation
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/device.h>
7*4882a593Smuzhiyun #include <linux/io.h>
8*4882a593Smuzhiyun #include <linux/ioport.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun #include <linux/of.h>
11*4882a593Smuzhiyun #include <linux/of_address.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/slab.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "brcmnand.h"
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun struct bcm63138_nand_soc {
18*4882a593Smuzhiyun struct brcmnand_soc soc;
19*4882a593Smuzhiyun void __iomem *base;
20*4882a593Smuzhiyun };
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define BCM63138_NAND_INT_STATUS 0x00
23*4882a593Smuzhiyun #define BCM63138_NAND_INT_EN 0x04
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun enum {
26*4882a593Smuzhiyun BCM63138_CTLRDY = BIT(4),
27*4882a593Smuzhiyun };
28*4882a593Smuzhiyun
bcm63138_nand_intc_ack(struct brcmnand_soc * soc)29*4882a593Smuzhiyun static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun struct bcm63138_nand_soc *priv =
32*4882a593Smuzhiyun container_of(soc, struct bcm63138_nand_soc, soc);
33*4882a593Smuzhiyun void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS;
34*4882a593Smuzhiyun u32 val = brcmnand_readl(mmio);
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun if (val & BCM63138_CTLRDY) {
37*4882a593Smuzhiyun brcmnand_writel(val & ~BCM63138_CTLRDY, mmio);
38*4882a593Smuzhiyun return true;
39*4882a593Smuzhiyun }
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return false;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
bcm63138_nand_intc_set(struct brcmnand_soc * soc,bool en)44*4882a593Smuzhiyun static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun struct bcm63138_nand_soc *priv =
47*4882a593Smuzhiyun container_of(soc, struct bcm63138_nand_soc, soc);
48*4882a593Smuzhiyun void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN;
49*4882a593Smuzhiyun u32 val = brcmnand_readl(mmio);
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun if (en)
52*4882a593Smuzhiyun val |= BCM63138_CTLRDY;
53*4882a593Smuzhiyun else
54*4882a593Smuzhiyun val &= ~BCM63138_CTLRDY;
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun brcmnand_writel(val, mmio);
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
bcm63138_nand_probe(struct platform_device * pdev)59*4882a593Smuzhiyun static int bcm63138_nand_probe(struct platform_device *pdev)
60*4882a593Smuzhiyun {
61*4882a593Smuzhiyun struct device *dev = &pdev->dev;
62*4882a593Smuzhiyun struct bcm63138_nand_soc *priv;
63*4882a593Smuzhiyun struct brcmnand_soc *soc;
64*4882a593Smuzhiyun struct resource *res;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
67*4882a593Smuzhiyun if (!priv)
68*4882a593Smuzhiyun return -ENOMEM;
69*4882a593Smuzhiyun soc = &priv->soc;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base");
72*4882a593Smuzhiyun priv->base = devm_ioremap_resource(dev, res);
73*4882a593Smuzhiyun if (IS_ERR(priv->base))
74*4882a593Smuzhiyun return PTR_ERR(priv->base);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun soc->ctlrdy_ack = bcm63138_nand_intc_ack;
77*4882a593Smuzhiyun soc->ctlrdy_set_enabled = bcm63138_nand_intc_set;
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun return brcmnand_probe(pdev, soc);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun static const struct of_device_id bcm63138_nand_of_match[] = {
83*4882a593Smuzhiyun { .compatible = "brcm,nand-bcm63138" },
84*4882a593Smuzhiyun {},
85*4882a593Smuzhiyun };
86*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun static struct platform_driver bcm63138_nand_driver = {
89*4882a593Smuzhiyun .probe = bcm63138_nand_probe,
90*4882a593Smuzhiyun .remove = brcmnand_remove,
91*4882a593Smuzhiyun .driver = {
92*4882a593Smuzhiyun .name = "bcm63138_nand",
93*4882a593Smuzhiyun .pm = &brcmnand_pm_ops,
94*4882a593Smuzhiyun .of_match_table = bcm63138_nand_of_match,
95*4882a593Smuzhiyun }
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun module_platform_driver(bcm63138_nand_driver);
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
100*4882a593Smuzhiyun MODULE_AUTHOR("Brian Norris");
101*4882a593Smuzhiyun MODULE_DESCRIPTION("NAND driver for BCM63138");
102