arch/mips/lantiq/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) 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.h>
  15
  16 #include "prom.h"
  17 #include "clk.h"
  18
  19 static struct ltq_soc_info soc_info;
  20
  21 unsigned int ltq_get_cpu_ver(void)
  22 {
  23         return soc_info.rev;
  24 }
  25 EXPORT_SYMBOL(ltq_get_cpu_ver);
  26
  27 unsigned int ltq_get_soc_type(void)
  28 {
  29         return soc_info.type;
  30 }
  31 EXPORT_SYMBOL(ltq_get_soc_type);
  32
  33 const char *get_system_type(void)
  34 {
  35         return soc_info.sys_type;
  36 }
  37
  38 void prom_free_prom_memory(void)
  39 {
  40 }
  41
  42 static void __init prom_init_cmdline(void)
  43 {
  44         int argc = fw_arg0;
  45         char **argv = (char **) KSEG1ADDR(fw_arg1);
  46         int i;
  47
  48         for (i = 0; i < argc; i++) {
  49                 char *p = (char *)  KSEG1ADDR(argv[i]);
  50
  51                 if (p && *p) {
  52                         strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  53                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  54                 }
  55         }
  56 }
  57
  58 void __init prom_init(void)
  59 {
  60         struct clk *clk;
  61
  62         ltq_soc_detect(&soc_info);
  63         clk_init();
  64         clk = clk_get(0, "cpu");
  65         snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev1.%d",
  66                 soc_info.name, soc_info.rev);
  67         clk_put(clk);
  68         soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
  69         pr_info("SoC: %s\n", soc_info.sys_type);
  70         prom_init_cmdline();
  71 }