target/linux/lantiq/files/arch/mips/lantiq/falcon/prom.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) 2011 Thomas Langer <thomas.langer@lantiq.com>
   7  * Copyright (C) 2011 John Crispin <blogic@openwrt.org>
   8  */
   9
  10 #include <lantiq_soc.h>
  11
  12 #include "devices.h"
  13
  14 #include "../prom.h"
  15
  16 #define SOC_FALCON              "Falcon"
  17 #define SOC_FALCON_D            "Falcon-D"
  18 #define SOC_FALCON_V            "Falcon-V"
  19 #define SOC_FALCON_M            "Falcon-M"
  20
  21 #define PART_SHIFT      12
  22 #define PART_MASK       0x0FFFF000
  23 #define REV_SHIFT       28
  24 #define REV_MASK        0xF0000000
  25 #define SREV_SHIFT      22
  26 #define SREV_MASK       0x03C00000
  27 #define TYPE_SHIFT      26
  28 #define TYPE_MASK       0x3C000000
  29
  30 /* this parameter allows us enable/disable asc1 via commandline */
  31 static int register_asc1;
  32 static int __init
  33 ltq_parse_asc1(char *p)
  34 {
  35         register_asc1 = 1;
  36         return 0;
  37 }
  38 __setup("use_asc1", ltq_parse_asc1);
  39
  40 void __init
  41 ltq_soc_setup(void)
  42 {
  43         ltq_register_asc(0);
  44         ltq_register_wdt();
  45         falcon_register_gpio();
  46         if (register_asc1)
  47                 ltq_register_asc(1);
  48 }
  49
  50 void __init
  51 ltq_soc_detect(struct ltq_soc_info *i)
  52 {
  53         u32 type;
  54         i->partnum = (ltq_r32(LTQ_FALCON_CHIPID) & PART_MASK) >> PART_SHIFT;
  55         i->rev = (ltq_r32(LTQ_FALCON_CHIPID) & REV_MASK) >> REV_SHIFT;
  56         i->srev = ((ltq_r32(LTQ_FALCON_CHIPCONF) & SREV_MASK) >> SREV_SHIFT);
  57         sprintf(i->rev_type, "%c%d%d", (i->srev & 0x4) ? ('B') : ('A'),
  58                 i->rev & 0x7, (i->srev & 0x3) + 1);
  59
  60         switch (i->partnum) {
  61         case SOC_ID_FALCON:
  62                 type = (ltq_r32(LTQ_FALCON_CHIPTYPE) & TYPE_MASK) >> TYPE_SHIFT;
  63                 switch (type) {
  64                 case 0:
  65                         i->name = SOC_FALCON_D;
  66                         break;
  67                 case 1:
  68                         i->name = SOC_FALCON_V;
  69                         break;
  70                 case 2:
  71                         i->name = SOC_FALCON_M;
  72                         break;
  73                 default:
  74                         i->name = SOC_FALCON;
  75                         break;
  76                 }
  77                 i->type = SOC_TYPE_FALCON;
  78                 break;
  79
  80         default:
  81                 unreachable();
  82                 break;
  83         }
  84 }