arch/mips/ralink/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) 2009 Gabor Juhos <juhosg@openwrt.org>
   7  *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
   8  *  Copyright (C) 2013 John Crispin <john@phrozen.org>
   9  */
  10
  11 #include <linux/string.h>
  12 #include <linux/of_fdt.h>
  13 #include <linux/of_platform.h>
  14
  15 #include <asm/bootinfo.h>
  16 #include <asm/addrspace.h>
  17
  18 #include <asm/mach-ralink/ralink_regs.h>
  19
  20 #include "common.h"
  21
  22 struct ralink_soc_info soc_info;
  23 struct rt2880_pmx_group *rt2880_pinmux_data = NULL;
  24
  25 enum ralink_soc_type ralink_soc;
  26 EXPORT_SYMBOL_GPL(ralink_soc);
  27
  28 const char *get_system_type(void)
  29 {
  30         return soc_info.sys_type;
  31 }
  32
  33 static __init void prom_init_cmdline(void)
  34 {
  35         int argc;
  36         char **argv;
  37         int i;
  38
  39         pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
  40                (unsigned int)fw_arg0, (unsigned int)fw_arg1,
  41                (unsigned int)fw_arg2, (unsigned int)fw_arg3);
  42
  43         argc = fw_arg0;
  44         argv = (char **) KSEG1ADDR(fw_arg1);
  45
  46         if (!argv) {
  47                 pr_debug("argv=%p is invalid, skipping\n",
  48                        argv);
  49                 return;
  50         }
  51
  52         for (i = 0; i < argc; i++) {
  53                 char *p = (char *) KSEG1ADDR(argv[i]);
  54
  55                 if (CPHYSADDR(p) && *p) {
  56                         pr_debug("argv[%d]: %s\n", i, p);
  57                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  58                         strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  59                 }
  60         }
  61 }
  62
  63 void __init prom_init(void)
  64 {
  65         prom_soc_init(&soc_info);
  66
  67         pr_info("SoC Type: %s\n", get_system_type());
  68
  69         prom_init_cmdline();
  70 }
  71
  72 void __init prom_free_prom_memory(void)
  73 {
  74 }