2 * Atheros AR71xx SoC specific prom routines
4 * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published
9 * by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
15 #include <linux/string.h>
17 #include <asm/bootinfo.h>
18 #include <asm/addrspace.h>
19 #include <asm/fw/myloader/myloader.h>
21 #include <asm/mach-ar71xx/ar71xx.h>
23 static inline int is_valid_ram_addr(void *addr
)
25 if (((u32
) addr
> KSEG0
) &&
26 ((u32
) addr
< (KSEG0
+ AR71XX_MEM_SIZE_MAX
)))
29 if (((u32
) addr
> KSEG1
) &&
30 ((u32
) addr
< (KSEG1
+ AR71XX_MEM_SIZE_MAX
)))
36 static void __init
ar71xx_prom_append_cmdline(const char *name
,
39 char buf
[COMMAND_LINE_SIZE
];
41 snprintf(buf
, sizeof(buf
), " %s=%s", name
, value
);
42 strlcat(arcs_cmdline
, buf
, sizeof(arcs_cmdline
));
45 static const char * __init
ar71xx_prom_find_env(char **envp
, const char *name
)
47 const char *ret
= NULL
;
51 if (!is_valid_ram_addr(envp
))
55 for (p
= envp
; is_valid_ram_addr(*p
); p
++) {
56 if (strncmp(name
, *p
, len
) == 0 && (*p
)[len
] == '=') {
61 /* RedBoot env comes in pointer pairs - key, value */
62 if (strncmp(name
, *p
, len
) == 0 && (*p
)[len
] == 0)
63 if (is_valid_ram_addr(*(++p
))) {
72 static int __init
ar71xx_prom_init_myloader(void)
74 struct myloader_info
*mylo
;
78 mylo
= myloader_get_info();
83 case DEVID_COMPEX_WP543
:
84 ar71xx_prom_append_cmdline("board", "WP543");
87 printk(KERN_WARNING
"prom: unknown device id: %x\n",
93 snprintf(mac_buf
, sizeof(mac_buf
), "%02x:%02x:%02x:%02x:%02x:%02x",
94 mac
[0], mac
[1], mac
[2], mac
[3], mac
[4], mac
[5]);
96 ar71xx_prom_append_cmdline("ethaddr", mac_buf
);
101 #ifdef CONFIG_IMAGE_CMDLINE_HACK
102 extern char __image_cmdline
[];
104 static int __init
ar71xx_use__image_cmdline(void)
106 char *p
= __image_cmdline
;
118 strlcpy(arcs_cmdline
, p
, sizeof(arcs_cmdline
));
120 strlcat(arcs_cmdline
, " ", sizeof(arcs_cmdline
));
121 strlcat(arcs_cmdline
, p
, sizeof(arcs_cmdline
));
127 static inline int ar71xx_use__image_cmdline(void) { return 0; }
130 static __init
void ar71xx_prom_init_cmdline(int argc
, char **argv
)
134 if (ar71xx_use__image_cmdline())
137 if (!is_valid_ram_addr(argv
))
140 for (i
= 0; i
< argc
; i
++)
141 if (is_valid_ram_addr(argv
[i
])) {
142 strlcat(arcs_cmdline
, " ", sizeof(arcs_cmdline
));
143 strlcat(arcs_cmdline
, argv
[i
], sizeof(arcs_cmdline
));
147 void __init
prom_init(void)
152 printk(KERN_DEBUG
"prom: fw_arg0=%08x, fw_arg1=%08x, "
153 "fw_arg2=%08x, fw_arg3=%08x\n",
154 (unsigned int)fw_arg0
, (unsigned int)fw_arg1
,
155 (unsigned int)fw_arg2
, (unsigned int)fw_arg3
);
158 if (ar71xx_prom_init_myloader())
161 ar71xx_prom_init_cmdline(fw_arg0
, (char **)fw_arg1
);
163 envp
= (char **)fw_arg2
;
164 if (!strstr(arcs_cmdline
, "ethaddr=")) {
165 env
= ar71xx_prom_find_env(envp
, "ethaddr");
167 ar71xx_prom_append_cmdline("ethaddr", env
);
170 if (!strstr(arcs_cmdline
, "board=")) {
171 env
= ar71xx_prom_find_env(envp
, "board");
173 /* Workaround for buggy bootloaders */
174 if (strcmp(env
, "RouterStation") == 0 ||
175 strcmp(env
, "Ubiquiti AR71xx-based board") == 0)
178 if (strcmp(env
, "RouterStation PRO") == 0)
181 ar71xx_prom_append_cmdline("board", env
);
186 void __init
prom_free_prom_memory(void)
188 /* We do not have to prom memory to free */