| 1 | /* |
| 2 | * Mikrotik's RouterBOOT 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/types.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/string.h> |
| 16 | #include <linux/module.h> |
| 17 | |
| 18 | #include <asm/bootinfo.h> |
| 19 | #include <asm/addrspace.h> |
| 20 | |
| 21 | #include <asm/mach-adm5120/adm5120_defs.h> |
| 22 | #include <prom/routerboot.h> |
| 23 | #include "prom_read.h" |
| 24 | |
| 25 | struct rb_hard_settings rb_hs; |
| 26 | static int rb_found; |
| 27 | |
| 28 | static int __init routerboot_load_hs(u8 *buf, u16 buflen) |
| 29 | { |
| 30 | u16 id, len; |
| 31 | |
| 32 | memset(&rb_hs, 0, sizeof(rb_hs)); |
| 33 | |
| 34 | if (buflen < 4) |
| 35 | return -1; |
| 36 | |
| 37 | if (prom_read_le32(buf) != RB_MAGIC_HARD) |
| 38 | return -1; |
| 39 | |
| 40 | /* skip magic value */ |
| 41 | buf += 4; |
| 42 | buflen -= 4; |
| 43 | |
| 44 | while (buflen > 2) { |
| 45 | id = prom_read_le16(buf); |
| 46 | buf += 2; |
| 47 | buflen -= 2; |
| 48 | if (id == RB_ID_TERMINATOR || buflen < 2) |
| 49 | break; |
| 50 | |
| 51 | len = prom_read_le16(buf); |
| 52 | buf += 2; |
| 53 | buflen -= 2; |
| 54 | |
| 55 | if (buflen < len) |
| 56 | break; |
| 57 | |
| 58 | switch (id) { |
| 59 | case RB_ID_BIOS_VERSION: |
| 60 | rb_hs.bios_ver = (char *)buf; |
| 61 | break; |
| 62 | case RB_ID_BOARD_NAME: |
| 63 | rb_hs.name = (char *)buf; |
| 64 | break; |
| 65 | case RB_ID_MEMORY_SIZE: |
| 66 | rb_hs.mem_size = prom_read_le32(buf); |
| 67 | break; |
| 68 | case RB_ID_MAC_ADDRESS_COUNT: |
| 69 | rb_hs.mac_count = prom_read_le32(buf); |
| 70 | break; |
| 71 | case RB_ID_MAC_ADDRESS_PACK: |
| 72 | if ((len / RB_MAC_SIZE) > 0) |
| 73 | rb_hs.mac_base = buf; |
| 74 | break; |
| 75 | } |
| 76 | |
| 77 | buf += len; |
| 78 | buflen -= len; |
| 79 | |
| 80 | } |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | #define RB_BS_OFFS 0x14 |
| 86 | #define RB_OFFS_MAX (128*1024) |
| 87 | |
| 88 | int __init routerboot_present(void) |
| 89 | { |
| 90 | struct rb_bios_settings *bs; |
| 91 | u8 *base; |
| 92 | u32 off, len; |
| 93 | |
| 94 | if (rb_found) |
| 95 | goto out; |
| 96 | |
| 97 | base = (u8 *)KSEG1ADDR(ADM5120_SRAM0_BASE); |
| 98 | bs = (struct rb_bios_settings *)(base + RB_BS_OFFS); |
| 99 | |
| 100 | off = prom_read_le32(&bs->hs_offs); |
| 101 | len = prom_read_le32(&bs->hs_size); |
| 102 | if (off > RB_OFFS_MAX) |
| 103 | goto out; |
| 104 | |
| 105 | if (routerboot_load_hs(base+off, len) != 0) |
| 106 | goto out; |
| 107 | |
| 108 | rb_found = 1; |
| 109 | |
| 110 | out: |
| 111 | return rb_found; |
| 112 | } |
| 113 | |
| 114 | char *routerboot_get_boardname(void) |
| 115 | { |
| 116 | if (rb_found == 0) |
| 117 | return NULL; |
| 118 | |
| 119 | return rb_hs.name; |
| 120 | } |
| 121 | |
