drivers/soc/imx/soc-imx.c

   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
  24 static 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
 187 free_serial_number:
 188         kfree(soc_dev_attr->serial_number);
 189 free_rev:
 190         kfree(soc_dev_attr->revision);
 191 free_soc:
 192         kfree(soc_dev_attr);
 193         return ret;
 194 }
 195 device_initcall(imx_soc_device_init);