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 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 26 static 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_MX51: 74 ocotp_compat = "fsl,imx51-iim"; 75 soc_id = "i.MX51"; 76 break; 77 case MXC_CPU_MX53: 78 ocotp_compat = "fsl,imx53-iim"; 79 soc_id = "i.MX53"; 80 break; 81 case MXC_CPU_IMX6SL: 82 ocotp_compat = "fsl,imx6sl-ocotp"; 83 soc_id = "i.MX6SL"; 84 break; 85 case MXC_CPU_IMX6DL: 86 ocotp_compat = "fsl,imx6q-ocotp"; 87 soc_id = "i.MX6DL"; 88 break; 89 case MXC_CPU_IMX6SX: 90 ocotp_compat = "fsl,imx6sx-ocotp"; 91 soc_id = "i.MX6SX"; 92 break; 93 case MXC_CPU_IMX6Q: 94 ocotp_compat = "fsl,imx6q-ocotp"; 95 soc_id = "i.MX6Q"; 96 break; 97 case MXC_CPU_IMX6UL: 98 ocotp_compat = "fsl,imx6ul-ocotp"; 99 soc_id = "i.MX6UL"; 100 break; 101 case MXC_CPU_IMX6ULL: 102 ocotp_compat = "fsl,imx6ull-ocotp"; 103 soc_id = "i.MX6ULL"; 104 break; 105 case MXC_CPU_IMX6ULZ: 106 ocotp_compat = "fsl,imx6ull-ocotp"; 107 soc_id = "i.MX6ULZ"; 108 break; 109 case MXC_CPU_IMX6SLL: 110 ocotp_compat = "fsl,imx6sll-ocotp"; 111 soc_id = "i.MX6SLL"; 112 break; 113 case MXC_CPU_IMX7D: 114 ocotp_compat = "fsl,imx7d-ocotp"; 115 soc_id = "i.MX7D"; 116 break; 117 case MXC_CPU_IMX7ULP: 118 ocotp_compat = "fsl,imx7ulp-ocotp"; 119 soc_id = "i.MX7ULP"; 120 break; 121 case MXC_CPU_VF500: 122 ocotp_compat = "fsl,vf610-ocotp"; 123 soc_id = "VF500"; 124 break; 125 case MXC_CPU_VF510: 126 ocotp_compat = "fsl,vf610-ocotp"; 127 soc_id = "VF510"; 128 break; 129 case MXC_CPU_VF600: 130 ocotp_compat = "fsl,vf610-ocotp"; 131 soc_id = "VF600"; 132 break; 133 case MXC_CPU_VF610: 134 ocotp_compat = "fsl,vf610-ocotp"; 135 soc_id = "VF610"; 136 break; 137 default: 138 soc_id = "Unknown"; 139 } 140 soc_dev_attr->soc_id = soc_id; 141 142 if (ocotp_compat) { 143 ocotp = syscon_regmap_lookup_by_compatible(ocotp_compat); 144 if (IS_ERR(ocotp)) 145 pr_err("%s: failed to find %s regmap!\n", __func__, ocotp_compat); 146 } 147 148 if (!IS_ERR_OR_NULL(ocotp)) { 149 if (__mxc_cpu_type == MXC_CPU_IMX7ULP) { 150 regmap_read(ocotp, OCOTP_ULP_UID_4, &val); 151 soc_uid = val & 0xffff; 152 regmap_read(ocotp, OCOTP_ULP_UID_3, &val); 153 soc_uid <<= 16; 154 soc_uid |= val & 0xffff; 155 regmap_read(ocotp, OCOTP_ULP_UID_2, &val); 156 soc_uid <<= 16; 157 soc_uid |= val & 0xffff; 158 regmap_read(ocotp, OCOTP_ULP_UID_1, &val); 159 soc_uid <<= 16; 160 soc_uid |= val & 0xffff; 161 } else if (__mxc_cpu_type == MXC_CPU_MX51 || 162 __mxc_cpu_type == MXC_CPU_MX53) { 163 for (i=0; i < 8; i++) { 164 regmap_read(ocotp, IIM_UID + i*4, &val); 165 soc_uid <<= 8; 166 soc_uid |= (val & 0xff); 167 } 168 } else { 169 regmap_read(ocotp, OCOTP_UID_H, &val); 170 soc_uid = val; 171 regmap_read(ocotp, OCOTP_UID_L, &val); 172 soc_uid <<= 32; 173 soc_uid |= val; 174 } 175 } 176 177 soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d", 178 (imx_get_soc_revision() >> 4) & 0xf, 179 imx_get_soc_revision() & 0xf); 180 if (!soc_dev_attr->revision) { 181 ret = -ENOMEM; 182 goto free_soc; 183 } 184 185 soc_dev_attr->serial_number = kasprintf(GFP_KERNEL, "%016llX", soc_uid); 186 if (!soc_dev_attr->serial_number) { 187 ret = -ENOMEM; 188 goto free_rev; 189 } 190 191 soc_dev = soc_device_register(soc_dev_attr); 192 if (IS_ERR(soc_dev)) { 193 ret = PTR_ERR(soc_dev); 194 goto free_serial_number; 195 } 196 197 return 0; 198 199 free_serial_number: 200 kfree(soc_dev_attr->serial_number); 201 free_rev: 202 kfree(soc_dev_attr->revision); 203 free_soc: 204 kfree(soc_dev_attr); 205 return ret; 206 } 207 device_initcall(imx_soc_device_init); 208