2 * Ralink RT288x SoC specific setup
4 * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Parts of this file are based on Ralink's 2.6.21 BSP
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
14 #include <linux/kernel.h>
15 #include <linux/init.h>
16 #include <linux/module.h>
18 #include <asm/mach-ralink/rt288x.h>
19 #include <asm/mach-ralink/rt288x_regs.h>
21 unsigned char rt288x_sys_type
[RT288X_SYS_TYPE_LEN
];
23 unsigned long rt288x_cpu_freq
;
24 EXPORT_SYMBOL_GPL(rt288x_cpu_freq
);
26 unsigned long rt288x_sys_freq
;
27 EXPORT_SYMBOL_GPL(rt288x_sys_freq
);
29 void __iomem
* rt288x_intc_base
;
30 void __iomem
* rt288x_sysc_base
;
31 void __iomem
* rt288x_memc_base
;
33 void __init
rt288x_detect_sys_type(void)
39 n0
= rt288x_sysc_rr(SYSC_REG_CHIP_NAME0
);
40 n1
= rt288x_sysc_rr(SYSC_REG_CHIP_NAME1
);
41 id
= rt288x_sysc_rr(SYSC_REG_CHIP_ID
);
43 snprintf(rt288x_sys_type
, RT288X_SYS_TYPE_LEN
,
44 "Ralink %c%c%c%c%c%c%c%c id:%u rev:%u",
45 (char) (n0
& 0xff), (char) ((n0
>> 8) & 0xff),
46 (char) ((n0
>> 16) & 0xff), (char) ((n0
>> 24) & 0xff),
47 (char) (n1
& 0xff), (char) ((n1
>> 8) & 0xff),
48 (char) ((n1
>> 16) & 0xff), (char) ((n1
>> 24) & 0xff),
49 (id
>> CHIP_ID_ID_SHIFT
) & CHIP_ID_ID_MASK
,
50 (id
& CHIP_ID_REV_MASK
));
53 void __init
rt288x_detect_sys_freq(void)
57 t
= rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG
);
58 t
= ((t
>> SYSTEM_CONFIG_CPUCLK_SHIFT
) & SYSTEM_CONFIG_CPUCLK_MASK
);
61 case SYSTEM_CONFIG_CPUCLK_250
:
62 rt288x_cpu_freq
= 250000000;
64 case SYSTEM_CONFIG_CPUCLK_266
:
65 rt288x_cpu_freq
= 266666667;
67 case SYSTEM_CONFIG_CPUCLK_280
:
68 rt288x_cpu_freq
= 280000000;
70 case SYSTEM_CONFIG_CPUCLK_300
:
71 rt288x_cpu_freq
= 300000000;
75 rt288x_sys_freq
= rt288x_cpu_freq
/ 2;