arch/mips/ralink/prom.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *
   4  *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2010 Joonas Lahtinen <joonas.lahtinen@gmail.com>
   6  *  Copyright (C) 2013 John Crispin <john@phrozen.org>
   7  */
   8
   9 #include <linux/string.h>
  10 #include <linux/of_fdt.h>
  11 #include <linux/of_platform.h>
  12
  13 #include <asm/bootinfo.h>
  14 #include <asm/addrspace.h>
  15
  16 #include <asm/mach-ralink/ralink_regs.h>
  17
  18 #include "common.h"
  19
  20 struct ralink_soc_info soc_info;
  21 struct rt2880_pmx_group *rt2880_pinmux_data = NULL;
  22
  23 enum ralink_soc_type ralink_soc;
  24 EXPORT_SYMBOL_GPL(ralink_soc);
  25
  26 const char *get_system_type(void)
  27 {
  28         return soc_info.sys_type;
  29 }
  30
  31 static __init void prom_init_cmdline(void)
  32 {
  33         int argc;
  34         char **argv;
  35         int i;
  36
  37         pr_debug("prom: fw_arg0=%08x fw_arg1=%08x fw_arg2=%08x fw_arg3=%08x\n",
  38                (unsigned int)fw_arg0, (unsigned int)fw_arg1,
  39                (unsigned int)fw_arg2, (unsigned int)fw_arg3);
  40
  41         argc = fw_arg0;
  42         argv = (char **) KSEG1ADDR(fw_arg1);
  43
  44         if (!argv) {
  45                 pr_debug("argv=%p is invalid, skipping\n",
  46                        argv);
  47                 return;
  48         }
  49
  50         for (i = 0; i < argc; i++) {
  51                 char *p = (char *) KSEG1ADDR(argv[i]);
  52
  53                 if (CPHYSADDR(p) && *p) {
  54                         pr_debug("argv[%d]: %s\n", i, p);
  55                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  56                         strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
  57                 }
  58         }
  59 }
  60
  61 void __init prom_init(void)
  62 {
  63         prom_soc_init(&soc_info);
  64
  65         pr_info("SoC Type: %s\n", get_system_type());
  66
  67         prom_init_cmdline();
  68 }
  69
  70 void __init prom_free_prom_memory(void)
  71 {
  72 }