package/uboot-lantiq/files/cpu/mips/ar9-clock.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <asm/ar9.h>
  26
  27 ulong ifx_get_ddr_hz(void)
  28 {
  29         switch((*AR9_CGU_SYS) & 0x05) {
  30                 case 0x01:
  31                 case 0x05:
  32                 return CLOCK_111M;
  33
  34                 case 0x00:
  35                 case 0x04:
  36                 return CLOCK_166M;
  37         }
  38
  39         return 0;
  40 }
  41
  42 ulong ifx_get_cpuclk(void)
  43 {
  44         switch((*AR9_CGU_SYS) & 0x05) {
  45                 case 0x00:
  46                 case 0x01:
  47                 return CLOCK_333M;
  48
  49                 case 0x04:
  50                 return CLOCK_166M;
  51
  52                 case 0x05:
  53                 return CLOCK_111M;
  54         }
  55
  56         return 0;
  57 }
  58
  59 ulong get_bus_freq(ulong dummy)
  60 {
  61         unsigned int ddr_clock=ifx_get_ddr_hz();
  62         if((*AR9_CGU_SYS) & 0x40){
  63                 return ddr_clock/2;
  64         } else {
  65                 return ddr_clock;
  66         }
  67 }