2 * Atheros AR71xx SoC specific prom routines
4 * Copyright (C) 2008-2009 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/serial_reg.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>
27 enum ar71xx_mach_type mach_type
;
30 static int ar71xx_prom_argc __initdata
;
31 static char **ar71xx_prom_argv __initdata
;
32 static char **ar71xx_prom_envp __initdata
;
34 static struct board_rec boards
[] __initdata
= {
37 .mach_type
= AR71XX_MACH_RB_411
,
40 .mach_type
= AR71XX_MACH_RB_433
,
43 .mach_type
= AR71XX_MACH_RB_433U
,
46 .mach_type
= AR71XX_MACH_RB_450
,
49 .mach_type
= AR71XX_MACH_RB_450G
,
52 .mach_type
= AR71XX_MACH_RB_493
,
55 .mach_type
= AR71XX_MACH_AP81
,
58 .mach_type
= AR71XX_MACH_AP83
,
61 .mach_type
= AR71XX_MACH_AW_NR580
,
64 .mach_type
= AR71XX_MACH_TEW_632BRP
,
67 .mach_type
= AR71XX_MACH_TL_WR741ND
,
70 .mach_type
= AR71XX_MACH_TL_WR941ND
,
73 .mach_type
= AR71XX_MACH_UBNT_RS
,
76 .mach_type
= AR71XX_MACH_UBNT_RSPRO
,
78 .name
= "Ubiquiti AR71xx-based board",
79 .mach_type
= AR71XX_MACH_UBNT_RS
,
81 .name
= "UBNT-LS-SR71",
82 .mach_type
= AR71XX_MACH_UBNT_LSSR71
,
85 .mach_type
= AR71XX_MACH_UBNT_LSX
,
88 .mach_type
= AR71XX_MACH_WNR2000
,
91 .mach_type
= AR71XX_MACH_WRT160NL
,
94 .mach_type
= AR71XX_MACH_WRT400N
,
97 .mach_type
= AR71XX_MACH_PB42
,
100 .mach_type
= AR71XX_MACH_PB44
,
102 .name
= "MZK-W300NH",
103 .mach_type
= AR71XX_MACH_MZK_W300NH
,
106 .mach_type
= AR71XX_MACH_MZK_W04NU
,
110 static inline int is_valid_ram_addr(void *addr
)
112 if (((u32
) addr
> KSEG0
) &&
113 ((u32
) addr
< (KSEG0
+ AR71XX_MEM_SIZE_MAX
)))
116 if (((u32
) addr
> KSEG1
) &&
117 ((u32
) addr
< (KSEG1
+ AR71XX_MEM_SIZE_MAX
)))
123 static __init
char *ar71xx_prom_getargv(const char *name
)
125 int len
= strlen(name
);
128 if (!is_valid_ram_addr(ar71xx_prom_argv
))
131 for (i
= 0; i
< ar71xx_prom_argc
; i
++) {
132 char *argv
= ar71xx_prom_argv
[i
];
134 if (!is_valid_ram_addr(argv
))
137 if (strncmp(name
, argv
, len
) == 0 && (argv
)[len
] == '=')
138 return argv
+ len
+ 1;
144 static __init
char *ar71xx_prom_getenv(const char *envname
)
146 int len
= strlen(envname
);
149 if (!is_valid_ram_addr(ar71xx_prom_envp
))
152 for (env
= ar71xx_prom_envp
; is_valid_ram_addr(*env
); env
++) {
153 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == '=')
154 return *env
+ len
+ 1;
156 /* RedBoot env comes in pointer pairs - key, value */
157 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == 0)
158 if (is_valid_ram_addr(*(++env
)))
165 static __init
unsigned long find_board_byname(char *name
)
169 for (i
= 0; i
< ARRAY_SIZE(boards
); i
++)
170 if (strcmp(name
, boards
[i
].name
) == 0)
171 return boards
[i
].mach_type
;
173 return AR71XX_MACH_GENERIC
;
176 static int ar71xx_prom_init_myloader(void)
178 struct myloader_info
*mylo
;
180 mylo
= myloader_get_info();
185 case DEVID_COMPEX_WP543
:
186 ar71xx_mach
= AR71XX_MACH_WP543
;
189 printk(KERN_WARNING
"prom: unknown device id: %x\n",
192 ar71xx_set_mac_base(mylo
->macs
[0]);
197 static void ar71xx_prom_init_generic(void)
201 ar71xx_prom_argc
= fw_arg0
;
202 ar71xx_prom_argv
= (char **)fw_arg1
;
203 ar71xx_prom_envp
= (char **)fw_arg2
;
205 p
= ar71xx_prom_getargv("board");
207 p
= ar71xx_prom_getenv("board");
209 ar71xx_mach
= find_board_byname(p
);
211 p
= ar71xx_prom_getenv("ethaddr");
213 p
= ar71xx_prom_getargv("kmac");
215 ar71xx_parse_mac_addr(p
);
218 void __init
prom_init(void)
220 printk(KERN_DEBUG
"prom: fw_arg0=%08x, fw_arg1=%08x, "
221 "fw_arg2=%08x, fw_arg3=%08x\n",
222 (unsigned int)fw_arg0
, (unsigned int)fw_arg1
,
223 (unsigned int)fw_arg2
, (unsigned int)fw_arg3
);
225 ar71xx_mach
= AR71XX_MACH_GENERIC
;
227 if (ar71xx_prom_init_myloader())
230 ar71xx_prom_init_generic();
233 void __init
prom_free_prom_memory(void)
235 /* We do not have to prom memory to free */
238 #define UART_READ(r) \
239 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
241 #define UART_WRITE(r, v) \
242 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
244 void prom_putchar(unsigned char ch
)
246 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);
247 UART_WRITE(UART_TX
, ch
);
248 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);