1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright 2020 NXP
4 */
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	/* Return early if this is running on devices with different SoCs */
37	if (!__mxc_cpu_type)
38		return 0;
39
40	if (of_machine_is_compatible("fsl,ls1021a"))
41		return 0;
42
43	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
44	if (!soc_dev_attr)
45		return -ENOMEM;
46
47	soc_dev_attr->family = "Freescale i.MX";
48
49	root = of_find_node_by_path("/");
50	ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
51	of_node_put(root);
52	if (ret)
53		goto free_soc;
54
55	switch (__mxc_cpu_type) {
56	case MXC_CPU_MX1:
57		soc_id = "i.MX1";
58		break;
59	case MXC_CPU_MX21:
60		soc_id = "i.MX21";
61		break;
62	case MXC_CPU_MX25:
63		soc_id = "i.MX25";
64		break;
65	case MXC_CPU_MX27:
66		soc_id = "i.MX27";
67		break;
68	case MXC_CPU_MX31:
69		soc_id = "i.MX31";
70		break;
71	case MXC_CPU_MX35:
72		soc_id = "i.MX35";
73		break;
74	case MXC_CPU_MX51:
75		soc_id = "i.MX51";
76		break;
77	case MXC_CPU_MX53:
78		soc_id = "i.MX53";
79		break;
80	case MXC_CPU_IMX6SL:
81		ocotp_compat = "fsl,imx6sl-ocotp";
82		soc_id = "i.MX6SL";
83		break;
84	case MXC_CPU_IMX6DL:
85		ocotp_compat = "fsl,imx6q-ocotp";
86		soc_id = "i.MX6DL";
87		break;
88	case MXC_CPU_IMX6SX:
89		ocotp_compat = "fsl,imx6sx-ocotp";
90		soc_id = "i.MX6SX";
91		break;
92	case MXC_CPU_IMX6Q:
93		ocotp_compat = "fsl,imx6q-ocotp";
94		soc_id = "i.MX6Q";
95		break;
96	case MXC_CPU_IMX6UL:
97		ocotp_compat = "fsl,imx6ul-ocotp";
98		soc_id = "i.MX6UL";
99		break;
100	case MXC_CPU_IMX6ULL:
101		ocotp_compat = "fsl,imx6ull-ocotp";
102		soc_id = "i.MX6ULL";
103		break;
104	case MXC_CPU_IMX6ULZ:
105		ocotp_compat = "fsl,imx6ull-ocotp";
106		soc_id = "i.MX6ULZ";
107		break;
108	case MXC_CPU_IMX6SLL:
109		ocotp_compat = "fsl,imx6sll-ocotp";
110		soc_id = "i.MX6SLL";
111		break;
112	case MXC_CPU_IMX7D:
113		ocotp_compat = "fsl,imx7d-ocotp";
114		soc_id = "i.MX7D";
115		break;
116	case MXC_CPU_IMX7ULP:
117		ocotp_compat = "fsl,imx7ulp-ocotp";
118		soc_id = "i.MX7ULP";
119		break;
120	case MXC_CPU_VF500:
121		ocotp_compat = "fsl,vf610-ocotp";
122		soc_id = "VF500";
123		break;
124	case MXC_CPU_VF510:
125		ocotp_compat = "fsl,vf610-ocotp";
126		soc_id = "VF510";
127		break;
128	case MXC_CPU_VF600:
129		ocotp_compat = "fsl,vf610-ocotp";
130		soc_id = "VF600";
131		break;
132	case MXC_CPU_VF610:
133		ocotp_compat = "fsl,vf610-ocotp";
134		soc_id = "VF610";
135		break;
136	default:
137		soc_id = "Unknown";
138	}
139	soc_dev_attr->soc_id = soc_id;
140
141	if (ocotp_compat) {
142		ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat);
143		if (IS_ERR(ocotp))
144			pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat);
145	}
146
147	if (!IS_ERR_OR_NULL(ocotp)) {
148		if (__mxc_cpu_type == MXC_CPU_IMX7ULP) {
149			regmap_read(ocotp, OCOTP_ULP_UID_4, &val);
150			soc_uid = val & 0xffff;
151			regmap_read(ocotp, OCOTP_ULP_UID_3, &val);
152			soc_uid <<= 16;
153			soc_uid |= val & 0xffff;
154			regmap_read(ocotp, OCOTP_ULP_UID_2, &val);
155			soc_uid <<= 16;
156			soc_uid |= val & 0xffff;
157			regmap_read(ocotp, OCOTP_ULP_UID_1, &val);
158			soc_uid <<= 16;
159			soc_uid |= val & 0xffff;
160		} else {
161			regmap_read(ocotp, OCOTP_UID_H, &val);
162			soc_uid = val;
163			regmap_read(ocotp, OCOTP_UID_L, &val);
164			soc_uid <<= 32;
165			soc_uid |= val;
166		}
167	}
168
169	soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
170					   (imx_get_soc_revision() >> 4) & 0xf,
171					   imx_get_soc_revision() & 0xf);
172	if (!soc_dev_attr->revision) {
173		ret = -ENOMEM;
174		goto free_soc;
175	}
176
177	soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid);
178	if (!soc_dev_attr->serial_number) {
179		ret = -ENOMEM;
180		goto free_rev;
181	}
182
183	soc_dev = soc_device_register(soc_dev_attr);
184	if (IS_ERR(soc_dev)) {
185		ret = PTR_ERR(soc_dev);
186		goto free_serial_number;
187	}
188
189	return 0;
190
191free_serial_number:
192	kfree(soc_dev_attr->serial_number);
193free_rev:
194	kfree(soc_dev_attr->revision);
195free_soc:
196	kfree(soc_dev_attr);
197	return ret;
198}
199device_initcall(imx_soc_device_init);
200