1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright © 2014 NVIDIA Corporation
4 * Copyright © 2015 Broadcom Corporation
5 */
6
7 #include <linux/io.h>
8 #include <linux/of.h>
9 #include <linux/of_address.h>
10 #include <linux/slab.h>
11 #include <linux/soc/brcmstb/brcmstb.h>
12 #include <linux/sys_soc.h>
13
14 static u32 family_id;
15 static u32 product_id;
16
brcmstb_get_family_id(void)17 u32 brcmstb_get_family_id(void)
18 {
19 return family_id;
20 }
21 EXPORT_SYMBOL(brcmstb_get_family_id);
22
brcmstb_get_product_id(void)23 u32 brcmstb_get_product_id(void)
24 {
25 return product_id;
26 }
27 EXPORT_SYMBOL(brcmstb_get_product_id);
28
29 static const struct of_device_id sun_top_ctrl_match[] = {
30 { .compatible = "brcm,bcm7125-sun-top-ctrl", },
31 { .compatible = "brcm,bcm7346-sun-top-ctrl", },
32 { .compatible = "brcm,bcm7358-sun-top-ctrl", },
33 { .compatible = "brcm,bcm7360-sun-top-ctrl", },
34 { .compatible = "brcm,bcm7362-sun-top-ctrl", },
35 { .compatible = "brcm,bcm7420-sun-top-ctrl", },
36 { .compatible = "brcm,bcm7425-sun-top-ctrl", },
37 { .compatible = "brcm,bcm7429-sun-top-ctrl", },
38 { .compatible = "brcm,bcm7435-sun-top-ctrl", },
39 { .compatible = "brcm,brcmstb-sun-top-ctrl", },
40 { }
41 };
42
brcmstb_soc_device_early_init(void)43 static int __init brcmstb_soc_device_early_init(void)
44 {
45 struct device_node *sun_top_ctrl;
46 void __iomem *sun_top_ctrl_base;
47 int ret = 0;
48
49 /* We could be on a multi-platform kernel, don't make this fatal but
50 * bail out early
51 */
52 sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
53 if (!sun_top_ctrl)
54 return ret;
55
56 sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
57 if (!sun_top_ctrl_base) {
58 ret = -ENODEV;
59 goto out;
60 }
61
62 family_id = readl(sun_top_ctrl_base);
63 product_id = readl(sun_top_ctrl_base + 0x4);
64 iounmap(sun_top_ctrl_base);
65 out:
66 of_node_put(sun_top_ctrl);
67 return ret;
68 }
69 early_initcall(brcmstb_soc_device_early_init);
70
brcmstb_soc_device_init(void)71 static int __init brcmstb_soc_device_init(void)
72 {
73 struct soc_device_attribute *soc_dev_attr;
74 struct device_node *sun_top_ctrl;
75 struct soc_device *soc_dev;
76 int ret = 0;
77
78 /* We could be on a multi-platform kernel, don't make this fatal but
79 * bail out early
80 */
81 sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
82 if (!sun_top_ctrl)
83 return ret;
84
85 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
86 if (!soc_dev_attr) {
87 ret = -ENOMEM;
88 goto out;
89 }
90
91 soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
92 family_id >> 28 ?
93 family_id >> 16 : family_id >> 8);
94 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
95 product_id >> 28 ?
96 product_id >> 16 : product_id >> 8);
97 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
98 ((product_id & 0xf0) >> 4) + 'A',
99 product_id & 0xf);
100
101 soc_dev = soc_device_register(soc_dev_attr);
102 if (IS_ERR(soc_dev)) {
103 kfree(soc_dev_attr->family);
104 kfree(soc_dev_attr->soc_id);
105 kfree(soc_dev_attr->revision);
106 kfree(soc_dev_attr);
107 ret = -ENOMEM;
108 }
109 out:
110 of_node_put(sun_top_ctrl);
111 return ret;
112 }
113 arch_initcall(brcmstb_soc_device_init);
114