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 struct brcmstb_soc_info {
15 u32 family_id;
16 u32 product_id;
17 };
18
19 static struct brcmstb_soc_info *soc_info;
20
brcmstb_get_family_id(void)21 u32 brcmstb_get_family_id(void)
22 {
23 return soc_info ? soc_info->family_id : 0;
24 }
25 EXPORT_SYMBOL(brcmstb_get_family_id);
26
brcmstb_get_product_id(void)27 u32 brcmstb_get_product_id(void)
28 {
29 return soc_info ? soc_info->product_id : 0;
30 }
31 EXPORT_SYMBOL(brcmstb_get_product_id);
32
33 static const struct of_device_id sun_top_ctrl_match[] = {
34 { .compatible = "brcm,bcm7125-sun-top-ctrl", },
35 { .compatible = "brcm,bcm7346-sun-top-ctrl", },
36 { .compatible = "brcm,bcm7358-sun-top-ctrl", },
37 { .compatible = "brcm,bcm7360-sun-top-ctrl", },
38 { .compatible = "brcm,bcm7362-sun-top-ctrl", },
39 { .compatible = "brcm,bcm7420-sun-top-ctrl", },
40 { .compatible = "brcm,bcm7425-sun-top-ctrl", },
41 { .compatible = "brcm,bcm7429-sun-top-ctrl", },
42 { .compatible = "brcm,bcm7435-sun-top-ctrl", },
43 { .compatible = "brcm,brcmstb-sun-top-ctrl", },
44 { }
45 };
46
brcmstb_soc_device_init(void)47 static int __init brcmstb_soc_device_init(void)
48 {
49 struct soc_device_attribute *soc_dev_attr;
50 struct device_node *sun_top_ctrl;
51 void __iomem *sun_top_ctrl_base;
52 struct soc_device *soc_dev;
53 int ret = 0;
54
55 /* We could be on a multi-platform kernel, don't make this fatal but
56 * bail out early
57 */
58 sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
59 if (!sun_top_ctrl)
60 return 0;
61
62 sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
63 if (!sun_top_ctrl_base) {
64 ret = -ENODEV;
65 goto out_put_node;
66 }
67
68 soc_info = kzalloc_obj(*soc_info);
69 if (!soc_info) {
70 ret = -ENOMEM;
71 goto out_unmap;
72 }
73
74 soc_info->family_id = readl(sun_top_ctrl_base);
75 soc_info->product_id = readl(sun_top_ctrl_base + 0x4);
76
77 soc_dev_attr = kzalloc_obj(*soc_dev_attr);
78 if (!soc_dev_attr) {
79 ret = -ENOMEM;
80 goto out_free_info;
81 }
82
83 soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
84 soc_info->family_id >> 28 ?
85 soc_info->family_id >> 16 : soc_info->family_id >> 8);
86 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
87 soc_info->product_id >> 28 ?
88 soc_info->product_id >> 16 : soc_info->product_id >> 8);
89 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
90 ((soc_info->product_id & 0xf0) >> 4) + 'A',
91 soc_info->product_id & 0xf);
92
93 soc_dev = soc_device_register(soc_dev_attr);
94 if (IS_ERR(soc_dev)) {
95 ret = PTR_ERR(soc_dev);
96 goto out_free_attr;
97 }
98
99 iounmap(sun_top_ctrl_base);
100 of_node_put(sun_top_ctrl);
101 return 0;
102
103 out_free_attr:
104 kfree(soc_dev_attr->revision);
105 kfree(soc_dev_attr->soc_id);
106 kfree(soc_dev_attr->family);
107 kfree(soc_dev_attr);
108 out_free_info:
109 kfree(soc_info);
110 soc_info = NULL;
111 out_unmap:
112 iounmap(sun_top_ctrl_base);
113 out_put_node:
114 of_node_put(sun_top_ctrl);
115 return ret;
116 }
117 early_initcall(brcmstb_soc_device_init);
118