1 /*
2 * Copyright © 2014 NVIDIA Corporation
3 * Copyright © 2015 Broadcom Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <linux/io.h>
16 #include <linux/of.h>
17 #include <linux/of_address.h>
18 #include <linux/slab.h>
19 #include <linux/soc/brcmstb/brcmstb.h>
20 #include <linux/sys_soc.h>
21
22 #include <soc/brcmstb/common.h>
23
24 static u32 family_id;
25 static u32 product_id;
26
27 static const struct of_device_id brcmstb_machine_match[] = {
28 { .compatible = "brcm,brcmstb", },
29 { }
30 };
31
soc_is_brcmstb(void)32 bool soc_is_brcmstb(void)
33 {
34 struct device_node *root;
35
36 root = of_find_node_by_path("/");
37 if (!root)
38 return false;
39
40 return of_match_node(brcmstb_machine_match, root) != NULL;
41 }
42
brcmstb_get_family_id(void)43 u32 brcmstb_get_family_id(void)
44 {
45 return family_id;
46 }
47 EXPORT_SYMBOL(brcmstb_get_family_id);
48
brcmstb_get_product_id(void)49 u32 brcmstb_get_product_id(void)
50 {
51 return product_id;
52 }
53 EXPORT_SYMBOL(brcmstb_get_product_id);
54
55 static const struct of_device_id sun_top_ctrl_match[] = {
56 { .compatible = "brcm,bcm7125-sun-top-ctrl", },
57 { .compatible = "brcm,bcm7346-sun-top-ctrl", },
58 { .compatible = "brcm,bcm7358-sun-top-ctrl", },
59 { .compatible = "brcm,bcm7360-sun-top-ctrl", },
60 { .compatible = "brcm,bcm7362-sun-top-ctrl", },
61 { .compatible = "brcm,bcm7420-sun-top-ctrl", },
62 { .compatible = "brcm,bcm7425-sun-top-ctrl", },
63 { .compatible = "brcm,bcm7429-sun-top-ctrl", },
64 { .compatible = "brcm,bcm7435-sun-top-ctrl", },
65 { .compatible = "brcm,brcmstb-sun-top-ctrl", },
66 { }
67 };
68
brcmstb_soc_device_early_init(void)69 static int __init brcmstb_soc_device_early_init(void)
70 {
71 struct device_node *sun_top_ctrl;
72 void __iomem *sun_top_ctrl_base;
73 int ret = 0;
74
75 /* We could be on a multi-platform kernel, don't make this fatal but
76 * bail out early
77 */
78 sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
79 if (!sun_top_ctrl)
80 return ret;
81
82 sun_top_ctrl_base = of_iomap(sun_top_ctrl, 0);
83 if (!sun_top_ctrl_base) {
84 ret = -ENODEV;
85 goto out;
86 }
87
88 family_id = readl(sun_top_ctrl_base);
89 product_id = readl(sun_top_ctrl_base + 0x4);
90 iounmap(sun_top_ctrl_base);
91 out:
92 of_node_put(sun_top_ctrl);
93 return ret;
94 }
95 early_initcall(brcmstb_soc_device_early_init);
96
brcmstb_soc_device_init(void)97 static int __init brcmstb_soc_device_init(void)
98 {
99 struct soc_device_attribute *soc_dev_attr;
100 struct device_node *sun_top_ctrl;
101 struct soc_device *soc_dev;
102 int ret = 0;
103
104 /* We could be on a multi-platform kernel, don't make this fatal but
105 * bail out early
106 */
107 sun_top_ctrl = of_find_matching_node(NULL, sun_top_ctrl_match);
108 if (!sun_top_ctrl)
109 return ret;
110
111 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
112 if (!soc_dev_attr) {
113 ret = -ENOMEM;
114 goto out;
115 }
116
117 soc_dev_attr->family = kasprintf(GFP_KERNEL, "%x",
118 family_id >> 28 ?
119 family_id >> 16 : family_id >> 8);
120 soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%x",
121 product_id >> 28 ?
122 product_id >> 16 : product_id >> 8);
123 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%c%d",
124 ((product_id & 0xf0) >> 4) + 'A',
125 product_id & 0xf);
126
127 soc_dev = soc_device_register(soc_dev_attr);
128 if (IS_ERR(soc_dev)) {
129 kfree(soc_dev_attr->family);
130 kfree(soc_dev_attr->soc_id);
131 kfree(soc_dev_attr->revision);
132 kfree(soc_dev_attr);
133 ret = -ENOMEM;
134 }
135 out:
136 of_node_put(sun_top_ctrl);
137 return ret;
138 }
139 arch_initcall(brcmstb_soc_device_init);
140
