diff options
Diffstat (limited to 'arch/mips/cpu/incaip_clock.c')
| -rw-r--r-- | arch/mips/cpu/incaip_clock.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/arch/mips/cpu/incaip_clock.c b/arch/mips/cpu/incaip_clock.c deleted file mode 100644 index b65dfe0..0000000 --- a/arch/mips/cpu/incaip_clock.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * (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/inca-ip.h> - - -/******************************************************************************* -* -* get_cpuclk - returns the frequency of the CPU. -* -* Gets the value directly from the INCA-IP hardware. -* -* RETURNS: -* 150.000.000 for 150 MHz -* 133.333.333 for 133 MHz (= 400MHz/3) -* 100.000.000 for 100 MHz (= 400MHz/4) -* NOTE: -* This functions should be used by the hardware driver to get the correct -* frequency of the CPU. Don't use the macros, which are set to init the CPU -* frequency in the ROM code. -*/ -uint incaip_get_cpuclk (void) -{ - /*-------------------------------------------------------------------------*/ - /* CPU Clock Input Multiplexer (MUX I) */ - /* Multiplexer MUX I selects the maximum input clock to the CPU. */ - /*-------------------------------------------------------------------------*/ - if (*((volatile ulong *) INCA_IP_CGU_CGU_MUXCR) & - INCA_IP_CGU_CGU_MUXCR_MUXI) { - /* MUX I set to 150 MHz clock */ - return 150000000; - } else { - /* MUX I set to 100/133 MHz clock */ - if (*((volatile ulong *) INCA_IP_CGU_CGU_DIVCR) & 0x40) { - /* Division value is 1/3, maximum CPU operating */ - /* frequency is 133.3 MHz */ - return 133333333; - } else { - /* Division value is 1/4, maximum CPU operating */ - /* frequency is 100 MHz */ - return 100000000; - } - } -} - -/******************************************************************************* -* -* get_fpiclk - returns the frequency of the FPI bus. -* -* Gets the value directly from the INCA-IP hardware. -* -* RETURNS: Frquency in Hz -* -* NOTE: -* This functions should be used by the hardware driver to get the correct -* frequency of the CPU. Don't use the macros, which are set to init the CPU -* frequency in the ROM code. -* The calculation for the -*/ -uint incaip_get_fpiclk (void) -{ - uint clkCPU; - - clkCPU = incaip_get_cpuclk (); - - switch (*((volatile ulong *) INCA_IP_CGU_CGU_DIVCR) & 0xC) { - case 0x4: - return clkCPU >> 1; /* devided by 2 */ - break; - case 0x8: - return clkCPU >> 2; /* devided by 4 */ - break; - default: - return clkCPU; - break; - } -} - -int incaip_set_cpuclk (void) -{ - extern void ebu_init(long); - extern void cgu_init(long); - extern void sdram_init(long); - char tmp[64]; - ulong cpuclk; - - if (getenv_f("cpuclk", tmp, sizeof (tmp)) > 0) { - cpuclk = simple_strtoul (tmp, NULL, 10) * 1000000; - cgu_init (cpuclk); - ebu_init (cpuclk); - sdram_init (cpuclk); - } - - return 0; -} |