source: trunk/package/uboot-ifxmips/files/cpu/mips/danube/ifx_clock.c @ 13291

Last change on this file since 13291 was 13291, checked in by thl, 8 years ago

[ifxmips] cleanup uboot package

File size: 2.0 KB
Line 
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-mips/danube.h>
26
27
28
29/*******************************************************************************
30*
31* get_cpuclk - returns the frequency of the CPU.
32*
33* NOTE:
34*   This functions should be used by the hardware driver to get the correct
35*   frequency of the CPU.
36*/
37
38unsigned int danube_get_ddr_hz(void)
39{
40        switch((*DANUBE_CGU_SYS) & 0x3){
41                case 0:
42                default:
43                        return 166666667;
44                case 1:
45                        return 133333333;
46                case 2:
47                        return 111111111;
48                case 3:
49                        return 83333333;
50        }
51}
52
53
54uint danube_get_cpuclk(void)
55{
56#ifdef CONFIG_USE_EMULATOR
57        return EMULATOR_CPU_SPEED;
58#else //NOT CONFIG_USE_EMULATOR
59        unsigned int ddr_clock=danube_get_ddr_hz();
60        switch((*DANUBE_CGU_SYS) & 0xc){
61                case 0:
62                default:
63                        return 333333333;
64                case 4:
65                        return ddr_clock;
66                case 8:
67                        return ddr_clock << 1;
68        }
69#endif
70}
71
72
73uint danube_get_fpiclk(void)
74{
75#ifdef CONFIG_USE_EMULATOR
76        unsigned int  clkCPU;
77        clkCPU = danube_get_cpu_hz();
78        return clkCPU >> 2;
79#else //NOT CONFIG_USE_EMULATOR
80        unsigned int ddr_clock=danube_get_ddr_hz();
81        if ((*DANUBE_CGU_SYS) & 0x40){
82                return ddr_clock >> 1;
83        }
84        return ddr_clock;
85#endif
86}
87
88
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