76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/*
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* Ralink RT288x SoC specific setup
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*
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* Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
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* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
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*
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* Parts of this file are based on Ralink's 2.6.21 BSP
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <asm/mach-ralink/common.h>
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#include <asm/mach-ralink/rt288x.h>
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#include <asm/mach-ralink/rt288x_regs.h>
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unsigned long rt288x_cpu_freq;
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EXPORT_SYMBOL_GPL(rt288x_cpu_freq);
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unsigned long rt288x_sys_freq;
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EXPORT_SYMBOL_GPL(rt288x_sys_freq);
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void __iomem * rt288x_sysc_base;
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void __iomem * rt288x_memc_base;
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void __init rt288x_detect_sys_type(void)
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{
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u32 n0;
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u32 n1;
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u32 id;
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n0 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME0);
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n1 = rt288x_sysc_rr(SYSC_REG_CHIP_NAME1);
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id = rt288x_sysc_rr(SYSC_REG_CHIP_ID);
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snprintf(ramips_sys_type, RAMIPS_SYS_TYPE_LEN,
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"Ralink %c%c%c%c%c%c%c%c id:%u rev:%u",
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(char) (n0 & 0xff), (char) ((n0 >> 8) & 0xff),
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(char) ((n0 >> 16) & 0xff), (char) ((n0 >> 24) & 0xff),
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(char) (n1 & 0xff), (char) ((n1 >> 8) & 0xff),
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(char) ((n1 >> 16) & 0xff), (char) ((n1 >> 24) & 0xff),
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(id >> CHIP_ID_ID_SHIFT) & CHIP_ID_ID_MASK,
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(id & CHIP_ID_REV_MASK));
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}
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void __init rt288x_detect_sys_freq(void)
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{
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u32 t;
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t = rt288x_sysc_rr(SYSC_REG_SYSTEM_CONFIG);
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t = ((t >> SYSTEM_CONFIG_CPUCLK_SHIFT) & SYSTEM_CONFIG_CPUCLK_MASK);
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switch (t) {
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case SYSTEM_CONFIG_CPUCLK_250:
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rt288x_cpu_freq = 250000000;
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break;
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case SYSTEM_CONFIG_CPUCLK_266:
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rt288x_cpu_freq = 266666667;
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break;
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case SYSTEM_CONFIG_CPUCLK_280:
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rt288x_cpu_freq = 280000000;
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break;
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case SYSTEM_CONFIG_CPUCLK_300:
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rt288x_cpu_freq = 300000000;
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break;
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}
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rt288x_sys_freq = rt288x_cpu_freq / 2;
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}
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