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 unsigned long 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_450
,
46 .mach_type
= AR71XX_MACH_RB_493
,
49 .mach_type
= AR71XX_MACH_AP81
,
52 .mach_type
= AR71XX_MACH_AP83
,
55 .mach_type
= AR71XX_MACH_AW_NR580
,
58 .mach_type
= AR71XX_MACH_TEW_632BRP
,
61 .mach_type
= AR71XX_MACH_TL_WR941ND
,
64 .mach_type
= AR71XX_MACH_UBNT_RS
,
67 .mach_type
= AR71XX_MACH_UBNT_RSPRO
,
69 .name
= "Ubiquiti AR71xx-based board",
70 .mach_type
= AR71XX_MACH_UBNT_RS
,
72 .name
= "UBNT-LS-SR71",
73 .mach_type
= AR71XX_MACH_UBNT_LSSR71
,
76 .mach_type
= AR71XX_MACH_UBNT_LSX
,
79 .mach_type
= AR71XX_MACH_WNR2000
,
82 .mach_type
= AR71XX_MACH_WRT160NL
,
85 .mach_type
= AR71XX_MACH_WRT400N
,
88 .mach_type
= AR71XX_MACH_PB42
,
91 .mach_type
= AR71XX_MACH_PB44
,
94 .mach_type
= AR71XX_MACH_MZK_W300NH
,
97 .mach_type
= AR71XX_MACH_MZK_W04NU
,
101 static inline int is_valid_ram_addr(void *addr
)
103 if (((u32
) addr
> KSEG0
) &&
104 ((u32
) addr
< (KSEG0
+ AR71XX_MEM_SIZE_MAX
)))
107 if (((u32
) addr
> KSEG1
) &&
108 ((u32
) addr
< (KSEG1
+ AR71XX_MEM_SIZE_MAX
)))
114 static __init
char *ar71xx_prom_getargv(const char *name
)
116 int len
= strlen(name
);
119 if (!is_valid_ram_addr(ar71xx_prom_argv
))
122 for (i
= 0; i
< ar71xx_prom_argc
; i
++) {
123 char *argv
= ar71xx_prom_argv
[i
];
125 if (!is_valid_ram_addr(argv
))
128 if (strncmp(name
, argv
, len
) == 0 && (argv
)[len
] == '=')
129 return argv
+ len
+ 1;
135 static __init
char *ar71xx_prom_getenv(const char *envname
)
137 int len
= strlen(envname
);
140 if (!is_valid_ram_addr(ar71xx_prom_envp
))
143 for (env
= ar71xx_prom_envp
; is_valid_ram_addr(*env
); env
++) {
144 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == '=')
145 return *env
+ len
+ 1;
147 /* RedBoot env comes in pointer pairs - key, value */
148 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == 0)
149 if (is_valid_ram_addr(*(++env
)))
156 static __init
unsigned long find_board_byname(char *name
)
160 for (i
= 0; i
< ARRAY_SIZE(boards
); i
++)
161 if (strcmp(name
, boards
[i
].name
) == 0)
162 return boards
[i
].mach_type
;
164 return AR71XX_MACH_GENERIC
;
167 static int ar71xx_prom_init_myloader(void)
169 struct myloader_info
*mylo
;
171 mylo
= myloader_get_info();
176 case DEVID_COMPEX_WP543
:
177 ar71xx_mach_type
= AR71XX_MACH_WP543
;
180 printk(KERN_WARNING
"prom: unknown device id: %x\n",
183 ar71xx_set_mac_base(mylo
->macs
[0]);
188 static void ar71xx_prom_init_generic(void)
192 ar71xx_prom_argc
= fw_arg0
;
193 ar71xx_prom_argv
= (char **)fw_arg1
;
194 ar71xx_prom_envp
= (char **)fw_arg2
;
196 p
= ar71xx_prom_getargv("board");
198 p
= ar71xx_prom_getenv("board");
200 ar71xx_mach_type
= find_board_byname(p
);
202 p
= ar71xx_prom_getenv("ethaddr");
204 p
= ar71xx_prom_getargv("kmac");
206 ar71xx_parse_mac_addr(p
);
209 void __init
prom_init(void)
211 printk(KERN_DEBUG
"prom: fw_arg0=%08x, fw_arg1=%08x, "
212 "fw_arg2=%08x, fw_arg3=%08x\n",
213 (unsigned int)fw_arg0
, (unsigned int)fw_arg1
,
214 (unsigned int)fw_arg2
, (unsigned int)fw_arg3
);
216 ar71xx_mach_type
= AR71XX_MACH_GENERIC
;
218 if (ar71xx_prom_init_myloader())
221 ar71xx_prom_init_generic();
224 void __init
prom_free_prom_memory(void)
226 /* We do not have to prom memory to free */
229 #define UART_READ(r) \
230 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
232 #define UART_WRITE(r, v) \
233 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
235 void prom_putchar(unsigned char ch
)
237 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);
238 UART_WRITE(UART_TX
, ch
);
239 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);