2 * ZyXEL's Bootbase specific prom routines
4 * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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.
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/string.h>
17 #include <asm/bootinfo.h>
18 #include <asm/addrspace.h>
19 #include <asm/byteorder.h>
21 #include <asm/mach-adm5120/adm5120_defs.h>
22 #include <prom/zynos.h>
23 #include "prom_read.h"
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))
30 static int bootbase_found
;
31 static struct zynos_board_info
*board_info
;
33 struct bootbase_info bootbase_info
;
35 static inline int bootbase_dbgarea_present(u8
*data
)
39 t
= prom_read_be32(data
+5);
40 if (t
!= ZYNOS_MAGIC_DBGAREA1
)
43 t
= prom_read_be32(data
+9);
44 if (t
!= ZYNOS_MAGIC_DBGAREA2
)
50 static inline u32
bootbase_get_bootext_addr(void)
52 return prom_read_be32(&board_info
->bootext_addr
);
55 static inline void bootbase_get_mac(u8
*mac
)
59 for (i
= 0; i
< 6; i
++)
60 mac
[i
] = board_info
->mac
[i
];
63 static inline u16
bootbase_get_vendor_id(void)
65 #define CHECK_VENDOR(n) (strnicmp(board_info->vendor, (n), strlen(n)) == 0)
66 unsigned char vendor
[ZYNOS_NAME_LEN
];
69 for (i
= 0; i
< ZYNOS_NAME_LEN
; i
++)
70 vendor
[i
] = board_info
->vendor
[i
];
72 if CHECK_VENDOR(ZYNOS_VENDOR_ZYXEL
)
73 return ZYNOS_VENDOR_ID_ZYXEL
;
75 if CHECK_VENDOR(ZYNOS_VENDOR_DLINK
)
76 return ZYNOS_VENDOR_ID_DLINK
;
78 if CHECK_VENDOR(ZYNOS_VENDOR_LUCENT
)
79 return ZYNOS_VENDOR_ID_LUCENT
;
81 if CHECK_VENDOR(ZYNOS_VENDOR_NETGEAR
)
82 return ZYNOS_VENDOR_ID_NETGEAR
;
84 return ZYNOS_VENDOR_ID_OTHER
;
87 static inline u16
bootbase_get_board_id(void)
89 return prom_read_be16(&board_info
->board_id
);
92 int __init
bootbase_present(void)
99 /* check presence of the dbgarea */
100 if (bootbase_dbgarea_present((u8
*)ZYNOS_HDBG_ADDR
) == 0)
103 board_info
= (struct zynos_board_info
*)(ZYNOS_INFO_ADDR
);
105 /* check for a valid BootExt address */
106 t
= bootbase_get_bootext_addr();
107 if ((t
< BOOTEXT_ADDR_MIN
) || (t
> BOOTEXT_ADDR_MAX
))
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
);
117 return bootbase_found
;