2 * Atheros AR71xx SoC specific prom routines
4 * Copyright (C) 2008 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
,
58 static __init
char *ar71xx_prom_getargv(const char *name
)
60 int len
= strlen(name
);
63 if (!ar71xx_prom_argv
)
66 for (i
= 0; i
< ar71xx_prom_argc
; i
++) {
67 char *argv
= ar71xx_prom_argv
[i
];
72 if (strncmp(name
, argv
, len
) == 0 && (argv
)[len
] == '=')
73 return argv
+ len
+ 1;
79 static __init
char *ar71xx_prom_getenv(const char *envname
)
81 int len
= strlen(envname
);
84 if (!ar71xx_prom_envp
)
87 for (env
= ar71xx_prom_envp
; *env
!= NULL
; env
++)
88 if (strncmp(envname
, *env
, len
) == 0 && (*env
)[len
] == '=')
89 return *env
+ len
+ 1;
94 static __init
unsigned long find_board_byname(char *name
)
98 for (i
= 0; i
< ARRAY_SIZE(boards
); i
++)
99 if (strcmp(name
, boards
[i
].name
) == 0)
100 return boards
[i
].mach_type
;
102 return AR71XX_MACH_GENERIC
;
105 static int ar71xx_prom_init_myloader(void)
107 struct myloader_info
*mylo
;
109 mylo
= myloader_get_info();
114 case DEVID_COMPEX_WP543
:
115 ar71xx_mach_type
= AR71XX_MACH_WP543
;
118 printk(KERN_WARNING
"prom: unknown device id: %x\n",
121 ar71xx_set_mac_base(mylo
->macs
[0]);
126 static void ar71xx_prom_init_generic(void)
130 ar71xx_prom_argc
= fw_arg0
;
131 ar71xx_prom_argv
= (char **)fw_arg1
;
132 ar71xx_prom_envp
= (char **)fw_arg2
;
134 p
= ar71xx_prom_getenv("board");
136 p
= ar71xx_prom_getargv("board");
138 ar71xx_mach_type
= find_board_byname(p
);
140 p
= ar71xx_prom_getenv("ethaddr");
142 p
= ar71xx_prom_getargv("kmac");
144 ar71xx_parse_mac_addr(p
);
147 void __init
prom_init(void)
149 printk(KERN_DEBUG
"prom: fw_arg0=%08x, fw_arg1=%08x, "
150 "fw_arg2=%08x, fw_arg3=%08x\n",
151 (unsigned int)fw_arg0
, (unsigned int)fw_arg1
,
152 (unsigned int)fw_arg2
, (unsigned int)fw_arg3
);
154 ar71xx_mach_type
= AR71XX_MACH_GENERIC
;
156 if (ar71xx_prom_init_myloader())
159 ar71xx_prom_init_generic();
162 void __init
prom_free_prom_memory(void)
164 /* We do not have to prom memory to free */
167 #define UART_READ(r) \
168 __raw_readl((void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4 * (r)))
170 #define UART_WRITE(r, v) \
171 __raw_writel((v), (void __iomem *)(KSEG1ADDR(AR71XX_UART_BASE) + 4*(r)))
173 void prom_putchar(unsigned char ch
)
175 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);
176 UART_WRITE(UART_TX
, ch
);
177 while (((UART_READ(UART_LSR
)) & UART_LSR_THRE
) == 0);