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>
22 #include <asm/mach-ar71xx/platform.h>
26 unsigned long mach_type
;
29 static int ar71xx_prom_argc __initdata
;
30 static char **ar71xx_prom_argv __initdata
;
31 static char **ar71xx_prom_envp __initdata
;
33 static struct board_rec boards
[] __initdata
= {
36 .mach_type
= AR71XX_MACH_RB_411
,
39 .mach_type
= AR71XX_MACH_RB_433
,
42 .mach_type
= AR71XX_MACH_RB_450
,
45 .mach_type
= AR71XX_MACH_RB_493
,
48 .mach_type
= AR71XX_MACH_AW_NR580
,
51 .mach_type
= AR71XX_MACH_AP83
,
54 .mach_type
= AR71XX_MACH_TEW_632BRP
,
57 .mach_type
= AR71XX_MACH_UBNT_RS
,
59 .name
= "Ubiquiti AR71xx-based board",
60 .mach_type
= AR71XX_MACH_UBNT_RS
,
62 .name
= "UBNT-LS-SR71",
63 .mach_type
= AR71XX_MACH_UBNT_LSSR71
,
66 .mach_type
= AR71XX_MACH_UBNT_LSX
,
69 .mach_type
= AR71XX_MACH_WNR2000
,
72 .mach_type
= AR71XX_MACH_PB42
,
75 .mach_type
= AR71XX_MACH_MZK_W300NH
,
78 .mach_type
= AR71XX_MACH_MZK_W04NU
,
82 static inline int is_valid_ram_addr(void *addr
)
84 if (((u32
) addr
> KSEG0
) &&
85 ((u32
) addr
< (KSEG0
+ AR71XX_MEM_SIZE_MAX
)))
88 if (((u32
) addr
> KSEG1
) &&
89 ((u32
) addr
< (KSEG1
+ AR71XX_MEM_SIZE_MAX
)))
95 static __init
char *ar71xx_prom_getargv(const char *name
)
97 int len
= strlen(name
);
100 if (!is_valid_ram_addr(ar71xx_prom_argv
))
103 for (i
= 0; i
< ar71xx_prom_argc
; i
++) {
104 char *argv
= ar71xx_prom_argv
[i
];
106 if (!is_valid_ram_addr(argv
))
109 if (strncmp(name
, argv
, len
) == 0 && (argv
)[len
] == '=')
110 return argv
+ len
+ 1;
116 static __init
char *ar71xx_prom_getenv(const char *envname
)
118 int len
= strlen(envname
);
121 if (!is_valid_ram_addr(ar71xx_prom_envp
))
124 for (env
= ar71xx_prom_envp
; is_valid_ram_addr(*env
); env
++) {
125 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == '=')
126 return *env
+ len
+ 1;
128 /* RedBoot env comes in pointer pairs - key, value */
129 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == 0)
130 if (is_valid_ram_addr(*(++env
)))
137 static __init
unsigned long find_board_byname(char *name
)
141 for (i
= 0; i
< ARRAY_SIZE(boards
); i
++)
142 if (strcmp(name
, boards
[i
].name
) == 0)
143 return boards
[i
].mach_type
;
145 return AR71XX_MACH_GENERIC
;
148 static int ar71xx_prom_init_myloader(void)
150 struct myloader_info
*mylo
;
152 mylo
= myloader_get_info();
157 case DEVID_COMPEX_WP543
:
158 ar71xx_mach_type
= AR71XX_MACH_WP543
;
161 printk(KERN_WARNING
"prom: unknown device id: %x\n",
164 ar71xx_set_mac_base(mylo
->macs
[0]);
169 static void ar71xx_prom_init_generic(void)
173 ar71xx_prom_argc
= fw_arg0
;
174 ar71xx_prom_argv
= (char **)fw_arg1
;
175 ar71xx_prom_envp
= (char **)fw_arg2
;
177 p
= ar71xx_prom_getargv("board");
179 p
= ar71xx_prom_getenv("board");
181 ar71xx_mach_type
= find_board_byname(p
);
183 p
= ar71xx_prom_getenv("ethaddr");
185 p
= ar71xx_prom_getargv("kmac");
187 ar71xx_parse_mac_addr(p
);
190 void __init
prom_init(void)
192 printk(KERN_DEBUG
"prom: fw_arg0=%08x, fw_arg1=%08x, "
193 "fw_arg2=%08x, fw_arg3=%08x\n",
194 (unsigned int)fw_arg0
, (unsigned int)fw_arg1
,
195 (unsigned int)fw_arg2
, (unsigned int)fw_arg3
);
197 ar71xx_mach_type
= AR71XX_MACH_GENERIC
;
199 if (ar71xx_prom_init_myloader())
202 ar71xx_prom_init_generic();
205 void __init
prom_free_prom_memory(void)
207 /* We do not have to prom memory to free */
210 #define UART_READ(r) \
211 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
213 #define UART_WRITE(r, v) \
214 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
216 void prom_putchar(unsigned char ch
)
218 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);
219 UART_WRITE(UART_TX
, ch
);
220 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);