source: trunk/target/linux/adm5120/files/arch/mips/adm5120/prom/bootbase.c @ 21672

Last change on this file since 21672 was 21672, checked in by juhosg, 6 years ago

adm5120: don't use linux/autoconf.h

  • Property svn:eol-style set to native
File size: 2.6 KB
Line 
1/*
2 *  ZyXEL's Bootbase 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
17#include <asm/bootinfo.h>
18#include <asm/addrspace.h>
19#include <asm/byteorder.h>
20
21#include <asm/mach-adm5120/adm5120_defs.h>
22#include <prom/zynos.h>
23#include "prom_read.h"
24
25#define ZYNOS_INFO_ADDR         KSEG1ADDR(ADM5120_SRAM0_BASE+0x3F90)
26#define ZYNOS_HDBG_ADDR         KSEG1ADDR(ADM5120_SRAM0_BASE+0x4000)
27#define BOOTEXT_ADDR_MIN        KSEG1ADDR(ADM5120_SRAM0_BASE)
28#define BOOTEXT_ADDR_MAX        (BOOTEXT_ADDR_MIN + (2*1024*1024))
29
30static int bootbase_found;
31static struct zynos_board_info *board_info;
32
33struct bootbase_info bootbase_info;
34
35static inline int bootbase_dbgarea_present(u8 *data)
36{
37        u32 t;
38
39        t = prom_read_be32(data+5);
40        if (t != ZYNOS_MAGIC_DBGAREA1)
41                return 0;
42
43        t = prom_read_be32(data+9);
44        if (t != ZYNOS_MAGIC_DBGAREA2)
45                return 0;
46
47        return 1;
48}
49
50static inline u32 bootbase_get_bootext_addr(void)
51{
52        return prom_read_be32(&board_info->bootext_addr);
53}
54
55static inline void bootbase_get_mac(u8 *mac)
56{
57        int     i;
58
59        for (i = 0; i < 6; i++)
60                mac[i] = board_info->mac[i];
61}
62
63static inline u16 bootbase_get_vendor_id(void)
64{
65#define CHECK_VENDOR(n) (strnicmp(board_info->vendor, (n), strlen(n)) == 0)
66        unsigned char vendor[ZYNOS_NAME_LEN];
67        int i;
68
69        for (i = 0; i < ZYNOS_NAME_LEN; i++)
70                vendor[i] = board_info->vendor[i];
71
72        if CHECK_VENDOR(ZYNOS_VENDOR_ZYXEL)
73                return ZYNOS_VENDOR_ID_ZYXEL;
74
75        if CHECK_VENDOR(ZYNOS_VENDOR_DLINK)
76                return ZYNOS_VENDOR_ID_DLINK;
77
78        if CHECK_VENDOR(ZYNOS_VENDOR_LUCENT)
79                return ZYNOS_VENDOR_ID_LUCENT;
80
81        if CHECK_VENDOR(ZYNOS_VENDOR_NETGEAR)
82                return ZYNOS_VENDOR_ID_NETGEAR;
83
84        return ZYNOS_VENDOR_ID_OTHER;
85}
86
87static inline u16 bootbase_get_board_id(void)
88{
89        return prom_read_be16(&board_info->board_id);
90}
91
92int __init bootbase_present(void)
93{
94        u32     t;
95
96        if (bootbase_found)
97                goto out;
98
99        /* check presence of the dbgarea */
100        if (bootbase_dbgarea_present((u8 *)ZYNOS_HDBG_ADDR) == 0)
101                goto out;
102
103        board_info = (struct zynos_board_info *)(ZYNOS_INFO_ADDR);
104
105        /* check for a valid BootExt address */
106        t = bootbase_get_bootext_addr();
107        if ((t < BOOTEXT_ADDR_MIN) || (t > BOOTEXT_ADDR_MAX))
108                goto out;
109
110        bootbase_info.vendor_id = bootbase_get_vendor_id();
111        bootbase_info.board_id = bootbase_get_board_id();
112        bootbase_get_mac(bootbase_info.mac);
113
114        bootbase_found = 1;
115
116out:
117        return bootbase_found;
118}
119
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