[kernel] 2.6.27: revert case insensitive match support in xt_string while we are...
[15.05/openwrt.git] / target / linux / adm5120 / files-2.6.26 / arch / mips / adm5120 / prom / bootbase.c
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/autoconf.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/string.h>
17
18 #include <asm/bootinfo.h>
19 #include <asm/addrspace.h>
20 #include <asm/byteorder.h>
21
22 #include <asm/mach-adm5120/adm5120_defs.h>
23 #include <prom/zynos.h>
24 #include "prom_read.h"
25
26 #define ZYNOS_INFO_ADDR         KSEG1ADDR(ADM5120_SRAM0_BASE+0x3F90)
27 #define ZYNOS_HDBG_ADDR         KSEG1ADDR(ADM5120_SRAM0_BASE+0x4000)
28 #define BOOTEXT_ADDR_MIN        KSEG1ADDR(ADM5120_SRAM0_BASE)
29 #define BOOTEXT_ADDR_MAX        (BOOTEXT_ADDR_MIN + (2*1024*1024))
30
31 static int bootbase_found;
32 static struct zynos_board_info *board_info;
33
34 struct bootbase_info bootbase_info;
35
36 static inline int bootbase_dbgarea_present(u8 *data)
37 {
38         u32 t;
39
40         t = prom_read_be32(data+5);
41         if (t != ZYNOS_MAGIC_DBGAREA1)
42                 return 0;
43
44         t = prom_read_be32(data+9);
45         if (t != ZYNOS_MAGIC_DBGAREA2)
46                 return 0;
47
48         return 1;
49 }
50
51 static inline u32 bootbase_get_bootext_addr(void)
52 {
53         return prom_read_be32(&board_info->bootext_addr);
54 }
55
56 static inline void bootbase_get_mac(u8 *mac)
57 {
58         int     i;
59
60         for (i = 0; i < 6; i++)
61                 mac[i] = board_info->mac[i];
62 }
63
64 static inline u16 bootbase_get_vendor_id(void)
65 {
66 #define CHECK_VENDOR(n) (strnicmp(board_info->vendor, (n), strlen(n)) == 0)
67         unsigned char vendor[ZYNOS_NAME_LEN];
68         int i;
69
70         for (i = 0; i < ZYNOS_NAME_LEN; i++)
71                 vendor[i] = board_info->vendor[i];
72
73         if CHECK_VENDOR(ZYNOS_VENDOR_ZYXEL)
74                 return ZYNOS_VENDOR_ID_ZYXEL;
75
76         if CHECK_VENDOR(ZYNOS_VENDOR_DLINK)
77                 return ZYNOS_VENDOR_ID_DLINK;
78
79         if CHECK_VENDOR(ZYNOS_VENDOR_LUCENT)
80                 return ZYNOS_VENDOR_ID_LUCENT;
81
82         if CHECK_VENDOR(ZYNOS_VENDOR_NETGEAR)
83                 return ZYNOS_VENDOR_ID_NETGEAR;
84
85         return ZYNOS_VENDOR_ID_OTHER;
86 }
87
88 static inline u16 bootbase_get_board_id(void)
89 {
90         return prom_read_be16(&board_info->board_id);
91 }
92
93 int __init bootbase_present(void)
94 {
95         u32     t;
96
97         if (bootbase_found)
98                 goto out;
99
100         /* check presence of the dbgarea */
101         if (bootbase_dbgarea_present((u8 *)ZYNOS_HDBG_ADDR) == 0)
102                 goto out;
103
104         board_info = (struct zynos_board_info *)(ZYNOS_INFO_ADDR);
105
106         /* check for a valid BootExt address */
107         t = bootbase_get_bootext_addr();
108         if ((t < BOOTEXT_ADDR_MIN) || (t > BOOTEXT_ADDR_MAX))
109                 goto out;
110
111         bootbase_info.vendor_id = bootbase_get_vendor_id();
112         bootbase_info.board_id = bootbase_get_board_id();
113         bootbase_get_mac(bootbase_info.mac);
114
115         bootbase_found = 1;
116
117 out:
118         return bootbase_found;
119 }
120