arch/arm/mach-uniphier/cpu-info.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2013-2014 Panasonic Corporation
   4  * Copyright (C) 2015-2017 Socionext Inc.
   5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   6  */
   7
   8 #include <stdio.h>
   9 #include <linux/errno.h>
  10 #include <linux/io.h>
  11 #include <linux/printk.h>
  12
  13 #include "base-address.h"
  14 #include "soc-info.h"
  15
  16 int print_cpuinfo(void)
  17 {
  18         unsigned int id, model, rev, required_model = 1, required_rev = 1;
  19         int ret;
  20
  21         ret = uniphier_base_address_init();
  22         if (ret)
  23                 return ret;
  24
  25         id = uniphier_get_soc_id();
  26         model = uniphier_get_soc_model();
  27         rev = uniphier_get_soc_revision();
  28
  29         puts("SoC:   ");
  30
  31         switch (id) {
  32         case UNIPHIER_LD4_ID:
  33                 puts("LD4");
  34                 required_rev = 2;
  35                 break;
  36         case UNIPHIER_PRO4_ID:
  37                 puts("Pro4");
  38                 break;
  39         case UNIPHIER_SLD8_ID:
  40                 puts("sLD8");
  41                 break;
  42         case UNIPHIER_PRO5_ID:
  43                 puts("Pro5");
  44                 break;
  45         case UNIPHIER_PXS2_ID:
  46                 puts("PXs2");
  47                 break;
  48         case UNIPHIER_LD6B_ID:
  49                 puts("LD6b");
  50                 break;
  51         case UNIPHIER_LD11_ID:
  52                 puts("LD11");
  53                 break;
  54         case UNIPHIER_LD20_ID:
  55                 puts("LD20");
  56                 break;
  57         case UNIPHIER_PXS3_ID:
  58                 puts("PXs3");
  59                 break;
  60         default:
  61                 printf("Unknown Processor ID (0x%x)\n", id);
  62                 return -ENOTSUPP;
  63         }
  64
  65         printf(" (model %d, revision %d)\n", model, rev);
  66
  67         if (model < required_model) {
  68                 pr_err("Only model %d or newer is supported.\n",
  69                        required_model);
  70                 return -ENOTSUPP;
  71         } else if (rev < required_rev) {
  72                 pr_err("Only revision %d or newer is supported.\n",
  73                        required_rev);
  74                 return -ENOTSUPP;
  75         }
  76
  77         return 0;
  78 }