arch/mips/lantiq/xway/prom-xway.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify it
   3  *  under the terms of the GNU General Public License version 2 as published
   4  *  by the Free Software Foundation.
   5  *
   6  *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
   7  */
   8
   9 #include <linux/export.h>
  10 #include <linux/clk.h>
  11 #include <asm/bootinfo.h>
  12 #include <asm/time.h>
  13
  14 #include <lantiq_soc.h>
  15
  16 #include "../prom.h"
  17
  18 #define SOC_DANUBE      "Danube"
  19 #define SOC_TWINPASS    "Twinpass"
  20 #define SOC_AR9         "AR9"
  21
  22 #define PART_SHIFT      12
  23 #define PART_MASK       0x0FFFFFFF
  24 #define REV_SHIFT       28
  25 #define REV_MASK        0xF0000000
  26
  27 void __init ltq_soc_detect(struct ltq_soc_info *i)
  28 {
  29         i->partnum = (ltq_r32(LTQ_MPS_CHIPID) & PART_MASK) >> PART_SHIFT;
  30         i->rev = (ltq_r32(LTQ_MPS_CHIPID) & REV_MASK) >> REV_SHIFT;
  31         switch (i->partnum) {
  32         case SOC_ID_DANUBE1:
  33         case SOC_ID_DANUBE2:
  34                 i->name = SOC_DANUBE;
  35                 i->type = SOC_TYPE_DANUBE;
  36                 break;
  37
  38         case SOC_ID_TWINPASS:
  39                 i->name = SOC_TWINPASS;
  40                 i->type = SOC_TYPE_DANUBE;
  41                 break;
  42
  43         case SOC_ID_ARX188:
  44         case SOC_ID_ARX168:
  45         case SOC_ID_ARX182:
  46                 i->name = SOC_AR9;
  47                 i->type = SOC_TYPE_AR9;
  48                 break;
  49
  50         default:
  51                 unreachable();
  52                 break;
  53         }
  54 }