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	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);