target/linux/ar71xx/files/arch/mips/fw/myloader/myloader.c

   1 /*
   2  *  Compex's MyLoader specific prom routines
   3  *
   4  *  Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify it
   7  *  under the terms of the GNU General Public License version 2 as published
   8  *  by the Free Software Foundation.
   9  *
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/types.h>
  15 #include <linux/string.h>
  16
  17 #include <asm/addrspace.h>
  18 #include <asm/fw/myloader/myloader.h>
  19
  20 #define SYS_PARAMS_ADDR         KSEG1ADDR(0x80000800)
  21 #define BOARD_PARAMS_ADDR       KSEG1ADDR(0x80000A00)
  22 #define PART_TABLE_ADDR         KSEG1ADDR(0x80000C00)
  23 #define BOOT_PARAMS_ADDR        KSEG1ADDR(0x80000E00)
  24
  25 static struct myloader_info myloader_info __initdata;
  26 static int myloader_found __initdata;
  27
  28 struct myloader_info * __init myloader_get_info(void)
  29 {
  30         struct mylo_system_params *sysp;
  31         struct mylo_board_params *boardp;
  32         struct mylo_partition_table *parts;
  33
  34         if (myloader_found)
  35                 return &myloader_info;
  36
  37         sysp = (struct mylo_system_params *)(SYS_PARAMS_ADDR);
  38         boardp = (struct mylo_board_params *)(BOARD_PARAMS_ADDR);
  39         parts = (struct mylo_partition_table *)(PART_TABLE_ADDR);
  40
  41         printk(KERN_DEBUG "MyLoader: sysp=%08x, boardp=%08x, parts=%08x\n",
  42                 sysp->magic, boardp->magic, parts->magic);
  43
  44         /* Check for some magic numbers */
  45         if (sysp->magic != MYLO_MAGIC_SYS_PARAMS ||
  46             boardp->magic != MYLO_MAGIC_BOARD_PARAMS ||
  47             le32_to_cpu(parts->magic) != MYLO_MAGIC_PARTITIONS)
  48                 return NULL;
  49
  50         printk(KERN_DEBUG "MyLoader: id=%04x:%04x, sub_id=%04x:%04x\n",
  51                 sysp->vid, sysp->did, sysp->svid, sysp->sdid);
  52
  53         myloader_info.vid = sysp->vid;
  54         myloader_info.did = sysp->did;
  55         myloader_info.svid = sysp->svid;
  56         myloader_info.sdid = sysp->sdid;
  57
  58         memcpy(myloader_info.macs, boardp->addr, sizeof(myloader_info.macs));
  59
  60         myloader_found = 1;
  61
  62         return &myloader_info;
  63 }