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/autoconf.h>
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/string.h>
18 #include <asm/bootinfo.h>
19 #include <asm/addrspace.h>
20 #include <asm/byteorder.h>
22 #include <asm/mach-adm5120/adm5120_defs.h>
23 #include <prom/zynos.h>
24 #include "prom_read.h"
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))
31 static int bootbase_found
;
32 static struct zynos_board_info
*board_info
;
34 struct bootbase_info bootbase_info
;
36 static inline int bootbase_dbgarea_present(u8
*data
)
40 t
= prom_read_be32(data
+5);
41 if (t
!= ZYNOS_MAGIC_DBGAREA1
)
44 t
= prom_read_be32(data
+9);
45 if (t
!= ZYNOS_MAGIC_DBGAREA2
)
51 static inline u32
bootbase_get_bootext_addr(void)
53 return prom_read_be32(&board_info
->bootext_addr
);
56 static inline u16
bootbase_get_vendor_id(void)
58 #define CHECK_VENDOR(n) (strnicmp(board_info->vendor, (n), strlen(n)) == 0)
59 unsigned char vendor
[ZYNOS_NAME_LEN
];
62 for (i
= 0; i
< ZYNOS_NAME_LEN
; i
++)
63 vendor
[i
] = board_info
->vendor
[i
];
65 if CHECK_VENDOR(ZYNOS_VENDOR_ZYXEL
)
66 return ZYNOS_VENDOR_ID_ZYXEL
;
68 if CHECK_VENDOR(ZYNOS_VENDOR_DLINK
)
69 return ZYNOS_VENDOR_ID_DLINK
;
71 if CHECK_VENDOR(ZYNOS_VENDOR_LUCENT
)
72 return ZYNOS_VENDOR_ID_LUCENT
;
74 if CHECK_VENDOR(ZYNOS_VENDOR_NETGEAR
)
75 return ZYNOS_VENDOR_ID_NETGEAR
;
77 return ZYNOS_VENDOR_ID_OTHER
;
80 static inline u16
bootbase_get_board_id(void)
82 return prom_read_be16(&board_info
->board_id
);
85 int __init
bootbase_present(void)
92 /* check presence of the dbgarea */
93 if (bootbase_dbgarea_present((u8
*)ZYNOS_HDBG_ADDR
) == 0)
96 board_info
= (struct zynos_board_info
*)(ZYNOS_INFO_ADDR
);
98 /* check for a valid BootExt address */
99 t
= bootbase_get_bootext_addr();
100 if ((t
< BOOTEXT_ADDR_MIN
) || (t
> BOOTEXT_ADDR_MAX
))
103 bootbase_info
.vendor_id
= bootbase_get_vendor_id();
104 bootbase_info
.board_id
= bootbase_get_board_id();
109 return bootbase_found
;