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5
6#include <linux/mfd/syscon.h>
7#include <linux/of.h>
8#include <linux/of_address.h>
9#include <linux/regmap.h>
10#include <linux/slab.h>
11#include <linux/sys_soc.h>
12
13#include <soc/imx/cpu.h>
14#include <soc/imx/revision.h>
15
16#define OCOTP_UID_H 0x420
17#define OCOTP_UID_L 0x410
18
19#define OCOTP_ULP_UID_1 0x4b0
20#define OCOTP_ULP_UID_2 0x4c0
21#define OCOTP_ULP_UID_3 0x4d0
22#define OCOTP_ULP_UID_4 0x4e0
23
24static int __init imx_soc_device_init(void)
25{
26 struct soc_device_attribute *soc_dev_attr;
27 const char *ocotp_compat = NULL;
28 struct soc_device *soc_dev;
29 struct device_node *root;
30 struct regmap *ocotp = NULL;
31 const char *soc_id;
32 u64 soc_uid = 0;
33 u32 val;
34 int ret;
35
36 if (of_machine_is_compatible("fsl,ls1021a"))
37 return 0;
38
39 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
40 if (!soc_dev_attr)
41 return -ENOMEM;
42
43 soc_dev_attr->family = "Freescale i.MX";
44
45 root = of_find_node_by_path("/");
46 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
47 of_node_put(root);
48 if (ret)
49 goto free_soc;
50
51 switch (__mxc_cpu_type) {
52 case MXC_CPU_MX1:
53 soc_id = "i.MX1";
54 break;
55 case MXC_CPU_MX21:
56 soc_id = "i.MX21";
57 break;
58 case MXC_CPU_MX25:
59 soc_id = "i.MX25";
60 break;
61 case MXC_CPU_MX27:
62 soc_id = "i.MX27";
63 break;
64 case MXC_CPU_MX31:
65 soc_id = "i.MX31";
66 break;
67 case MXC_CPU_MX35:
68 soc_id = "i.MX35";
69 break;
70 case MXC_CPU_MX51:
71 soc_id = "i.MX51";
72 break;
73 case MXC_CPU_MX53:
74 soc_id = "i.MX53";
75 break;
76 case MXC_CPU_IMX6SL:
77 ocotp_compat = "fsl,imx6sl-ocotp";
78 soc_id = "i.MX6SL";
79 break;
80 case MXC_CPU_IMX6DL:
81 ocotp_compat = "fsl,imx6q-ocotp";
82 soc_id = "i.MX6DL";
83 break;
84 case MXC_CPU_IMX6SX:
85 ocotp_compat = "fsl,imx6sx-ocotp";
86 soc_id = "i.MX6SX";
87 break;
88 case MXC_CPU_IMX6Q:
89 ocotp_compat = "fsl,imx6q-ocotp";
90 soc_id = "i.MX6Q";
91 break;
92 case MXC_CPU_IMX6UL:
93 ocotp_compat = "fsl,imx6ul-ocotp";
94 soc_id = "i.MX6UL";
95 break;
96 case MXC_CPU_IMX6ULL:
97 ocotp_compat = "fsl,imx6ull-ocotp";
98 soc_id = "i.MX6ULL";
99 break;
100 case MXC_CPU_IMX6ULZ:
101 ocotp_compat = "fsl,imx6ull-ocotp";
102 soc_id = "i.MX6ULZ";
103 break;
104 case MXC_CPU_IMX6SLL:
105 ocotp_compat = "fsl,imx6sll-ocotp";
106 soc_id = "i.MX6SLL";
107 break;
108 case MXC_CPU_IMX7D:
109 ocotp_compat = "fsl,imx7d-ocotp";
110 soc_id = "i.MX7D";
111 break;
112 case MXC_CPU_IMX7ULP:
113 ocotp_compat = "fsl,imx7ulp-ocotp";
114 soc_id = "i.MX7ULP";
115 break;
116 case MXC_CPU_VF500:
117 ocotp_compat = "fsl,vf610-ocotp";
118 soc_id = "VF500";
119 break;
120 case MXC_CPU_VF510:
121 ocotp_compat = "fsl,vf610-ocotp";
122 soc_id = "VF510";
123 break;
124 case MXC_CPU_VF600:
125 ocotp_compat = "fsl,vf610-ocotp";
126 soc_id = "VF600";
127 break;
128 case MXC_CPU_VF610:
129 ocotp_compat = "fsl,vf610-ocotp";
130 soc_id = "VF610";
131 break;
132 default:
133 soc_id = "Unknown";
134 }
135 soc_dev_attr->soc_id = soc_id;
136
137 if (ocotp_compat) {
138 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
139 if (IS_ERR(ocotp))
140 pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
141 }
142
143 if (!IS_ERR_OR_NULL(ocotp)) {
144 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
145 regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
146 soc_uid = val & 0xffff;
147 regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
148 soc_uid <<= 16;
149 soc_uid |= val & 0xffff;
150 regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
151 soc_uid <<= 16;
152 soc_uid |= val & 0xffff;
153 regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
154 soc_uid <<= 16;
155 soc_uid |= val & 0xffff;
156 } else {
157 regmap_read(ocotp, OCOTP_UID_H, &val);
158 soc_uid = val;
159 regmap_read(ocotp, OCOTP_UID_L, &val);
160 soc_uid <<= 32;
161 soc_uid |= val;
162 }
163 }
164
165 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
166 (imx_get_soc_revision() >> 4) & 0xf,
167 imx_get_soc_revision() & 0xf);
168 if (!soc_dev_attr->revision) {
169 ret = -ENOMEM;
170 goto free_soc;
171 }
172
173 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
174 if (!soc_dev_attr->serial_number) {
175 ret = -ENOMEM;
176 goto free_rev;
177 }
178
179 soc_dev = soc_device_register(soc_dev_attr);
180 if (IS_ERR(soc_dev)) {
181 ret = PTR_ERR(soc_dev);
182 goto free_serial_number;
183 }
184
185 return 0;
186
187free_serial_number:
188 kfree(soc_dev_attr->serial_number);
189free_rev:
190 kfree(soc_dev_attr->revision);
191free_soc:
192 kfree(soc_dev_attr);
193 return ret;
194}
195device_initcall(imx_soc_device_init);
196
