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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 IIM_UID 0x820
17
18#define OCOTP_UID_H 0x420
19#define OCOTP_UID_L 0x410
20
21#define OCOTP_ULP_UID_1 0x4b0
22#define OCOTP_ULP_UID_2 0x4c0
23#define OCOTP_ULP_UID_3 0x4d0
24#define OCOTP_ULP_UID_4 0x4e0
25
26static int __init imx_soc_device_init(void)
27{
28 struct soc_device_attribute *soc_dev_attr;
29 const char *ocotp_compat = NULL;
30 struct soc_device *soc_dev;
31 struct device_node *root;
32 struct regmap *ocotp = NULL;
33 const char *soc_id;
34 u64 soc_uid = 0;
35 u32 val;
36 int ret;
37 int i;
38
39 if (of_machine_is_compatible("fsl,ls1021a"))
40 return 0;
41
42 soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
43 if (!soc_dev_attr)
44 return -ENOMEM;
45
46 soc_dev_attr->family = "Freescale i.MX";
47
48 root = of_find_node_by_path("/");
49 ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
50 of_node_put(root);
51 if (ret)
52 goto free_soc;
53
54 switch (__mxc_cpu_type) {
55 case MXC_CPU_MX1:
56 soc_id = "i.MX1";
57 break;
58 case MXC_CPU_MX21:
59 soc_id = "i.MX21";
60 break;
61 case MXC_CPU_MX25:
62 soc_id = "i.MX25";
63 break;
64 case MXC_CPU_MX27:
65 soc_id = "i.MX27";
66 break;
67 case MXC_CPU_MX31:
68 soc_id = "i.MX31";
69 break;
70 case MXC_CPU_MX35:
71 soc_id = "i.MX35";
72 break;
73 case MXC_CPU_MX50:
74 soc_id = "i.MX50";
75 break;
76 case MXC_CPU_MX51:
77 ocotp_compat = "fsl,imx51-iim";
78 soc_id = "i.MX51";
79 break;
80 case MXC_CPU_MX53:
81 ocotp_compat = "fsl,imx53-iim";
82 soc_id = "i.MX53";
83 break;
84 case MXC_CPU_IMX6SL:
85 ocotp_compat = "fsl,imx6sl-ocotp";
86 soc_id = "i.MX6SL";
87 break;
88 case MXC_CPU_IMX6DL:
89 ocotp_compat = "fsl,imx6q-ocotp";
90 soc_id = "i.MX6DL";
91 break;
92 case MXC_CPU_IMX6SX:
93 ocotp_compat = "fsl,imx6sx-ocotp";
94 soc_id = "i.MX6SX";
95 break;
96 case MXC_CPU_IMX6Q:
97 ocotp_compat = "fsl,imx6q-ocotp";
98 soc_id = "i.MX6Q";
99 break;
100 case MXC_CPU_IMX6UL:
101 ocotp_compat = "fsl,imx6ul-ocotp";
102 soc_id = "i.MX6UL";
103 break;
104 case MXC_CPU_IMX6ULL:
105 ocotp_compat = "fsl,imx6ull-ocotp";
106 soc_id = "i.MX6ULL";
107 break;
108 case MXC_CPU_IMX6ULZ:
109 ocotp_compat = "fsl,imx6ull-ocotp";
110 soc_id = "i.MX6ULZ";
111 break;
112 case MXC_CPU_IMX6SLL:
113 ocotp_compat = "fsl,imx6sll-ocotp";
114 soc_id = "i.MX6SLL";
115 break;
116 case MXC_CPU_IMX7D:
117 ocotp_compat = "fsl,imx7d-ocotp";
118 soc_id = "i.MX7D";
119 break;
120 case MXC_CPU_IMX7ULP:
121 ocotp_compat = "fsl,imx7ulp-ocotp";
122 soc_id = "i.MX7ULP";
123 break;
124 case MXC_CPU_VF500:
125 ocotp_compat = "fsl,vf610-ocotp";
126 soc_id = "VF500";
127 break;
128 case MXC_CPU_VF510:
129 ocotp_compat = "fsl,vf610-ocotp";
130 soc_id = "VF510";
131 break;
132 case MXC_CPU_VF600:
133 ocotp_compat = "fsl,vf610-ocotp";
134 soc_id = "VF600";
135 break;
136 case MXC_CPU_VF610:
137 ocotp_compat = "fsl,vf610-ocotp";
138 soc_id = "VF610";
139 break;
140 default:
141 soc_id = "Unknown";
142 }
143 soc_dev_attr->soc_id = soc_id;
144
145 if (ocotp_compat) {
146 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
147 if (IS_ERR(ocotp))
148 pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
149 }
150
151 if (!IS_ERR_OR_NULL(ocotp)) {
152 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
153 regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
154 soc_uid = val & 0xffff;
155 regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
156 soc_uid <<= 16;
157 soc_uid |= val & 0xffff;
158 regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
159 soc_uid <<= 16;
160 soc_uid |= val & 0xffff;
161 regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
162 soc_uid <<= 16;
163 soc_uid |= val & 0xffff;
164 } else if (__mxc_cpu_type == MXC_CPU_MX51 ||
165 __mxc_cpu_type == MXC_CPU_MX53) {
166 for (i=0; i < 8; i++) {
167 regmap_read(ocotp, IIM_UID + i*4, &val);
168 soc_uid <<= 8;
169 soc_uid |= (val & 0xff);
170 }
171 } else {
172 regmap_read(ocotp, OCOTP_UID_H, &val);
173 soc_uid = val;
174 regmap_read(ocotp, OCOTP_UID_L, &val);
175 soc_uid <<= 32;
176 soc_uid |= val;
177 }
178 }
179
180 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
181 (imx_get_soc_revision() >> 4) & 0xf,
182 imx_get_soc_revision() & 0xf);
183 if (!soc_dev_attr->revision) {
184 ret = -ENOMEM;
185 goto free_soc;
186 }
187
188 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
189 if (!soc_dev_attr->serial_number) {
190 ret = -ENOMEM;
191 goto free_rev;
192 }
193
194 soc_dev = soc_device_register(soc_dev_attr);
195 if (IS_ERR(soc_dev)) {
196 ret = PTR_ERR(soc_dev);
197 goto free_serial_number;
198 }
199
200 return 0;
201
202free_serial_number:
203 kfree(soc_dev_attr->serial_number);
204free_rev:
205 kfree(soc_dev_attr->revision);
206free_soc:
207 kfree(soc_dev_attr);
208 return ret;
209}
210device_initcall(imx_soc_device_init);
211
