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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm-mips/danube.h>
/*******************************************************************************
*
* get_cpuclk - returns the frequency of the CPU.
*
* NOTE:
* This functions should be used by the hardware driver to get the correct
* frequency of the CPU.
*/
unsigned int danube_get_ddr_hz(void)
{
switch((*DANUBE_CGU_SYS) & 0x3){
case 0:
default:
return 166666667;
case 1:
return 133333333;
case 2:
return 111111111;
case 3:
return 83333333;
}
}
uint danube_get_cpuclk(void)
{
#ifdef CONFIG_USE_EMULATOR
return EMULATOR_CPU_SPEED;
#else //NOT CONFIG_USE_EMULATOR
unsigned int ddr_clock=danube_get_ddr_hz();
switch((*DANUBE_CGU_SYS) & 0xc){
case 0:
default:
return 333333333;
case 4:
return ddr_clock;
case 8:
return ddr_clock << 1;
}
#endif
}
uint danube_get_fpiclk(void)
{
#ifdef CONFIG_USE_EMULATOR
unsigned int clkCPU;
clkCPU = danube_get_cpu_hz();
return clkCPU >> 2;
#else //NOT CONFIG_USE_EMULATOR
unsigned int ddr_clock=danube_get_ddr_hz();
if ((*DANUBE_CGU_SYS) & 0x40){
return ddr_clock >> 1;
}
return ddr_clock;
#endif
}
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