arch/arm/mach-uniphier/cpu_info.c

   1 /*
   2  * Copyright (C) 2013-2014 Panasonic Corporation
   3  *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <mach/sg-regs.h>
  11
  12 int print_cpuinfo(void)
  13 {
  14         u32 revision, type, model, rev, required_model = 1, required_rev = 1;
  15
  16         revision = readl(SG_REVISION);
  17         type = (revision & SG_REVISION_TYPE_MASK) >> SG_REVISION_TYPE_SHIFT;
  18         model = (revision & SG_REVISION_MODEL_MASK) >> SG_REVISION_MODEL_SHIFT;
  19         rev = (revision & SG_REVISION_REV_MASK) >> SG_REVISION_REV_SHIFT;
  20
  21         puts("CPU:   ");
  22
  23         switch (type) {
  24         case 0x25:
  25                 puts("PH1-sLD3 (MN2WS0220)");
  26                 required_model = 2;
  27                 break;
  28         case 0x26:
  29                 puts("PH1-LD4 (MN2WS0250)");
  30                 required_rev = 2;
  31                 break;
  32         case 0x28:
  33                 puts("PH1-Pro4 (MN2WS0230)");
  34                 break;
  35         case 0x29:
  36                 puts("PH1-sLD8 (MN2WS0270)");
  37                 break;
  38         default:
  39                 printf("Unknown Processor ID (0x%x)\n", revision);
  40                 return -1;
  41         }
  42
  43         if (model > 1)
  44                 printf(" model %d", model);
  45
  46         printf(" (rev. %d)\n", rev);
  47
  48         if (model < required_model) {
  49                 printf("Sorry, this model is not supported.\n");
  50                 printf("Required model is %d.", required_model);
  51                 return -1;
  52         } else if (rev < required_rev) {
  53                 printf("Sorry, this revision is not supported.\n");
  54                 printf("Required revision is %d.", required_rev);
  55                 return -1;
  56         }
  57
  58         return 0;
  59 }