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/*
*
* (c) 2004 Sascha Hauer <sascha@saschahauer.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>
#if defined (CONFIG_IMX)
#include <asm/arch/imx-regs.h>
/* ------------------------------------------------------------------------- */
/* NOTE: This describes the proper use of this file.
*
* CONFIG_SYS_CLK_FREQ should be defined as the input frequency of the PLL.
* SH FIXME: 16780000 in our case
* get_FCLK(), get_HCLK(), get_PCLK() and get_UCLK() return the clock of
* the specified bus in HZ.
*/
/* ------------------------------------------------------------------------- */
ulong get_systemPLLCLK(void)
{
/* FIXME: We assume System_SEL = 0 here */
u32 spctl0 = SPCTL0;
u32 mfi = (spctl0 >> 10) & 0xf;
u32 mfn = spctl0 & 0x3f;
u32 mfd = (spctl0 >> 16) & 0x3f;
u32 pd = (spctl0 >> 26) & 0xf;
mfi = mfi<=5 ? 5 : mfi;
return (2*(CONFIG_SYSPLL_CLK_FREQ>>10)*( (mfi<<10) + (mfn<<10)/(mfd+1)))/(pd+1);
}
ulong get_mcuPLLCLK(void)
{
/* FIXME: We assume System_SEL = 0 here */
u32 mpctl0 = MPCTL0;
u32 mfi = (mpctl0 >> 10) & 0xf;
u32 mfn = mpctl0 & 0x3f;
u32 mfd = (mpctl0 >> 16) & 0x3f;
u32 pd = (mpctl0 >> 26) & 0xf;
mfi = mfi<=5 ? 5 : mfi;
return (2*(CONFIG_SYS_CLK_FREQ>>10)*( (mfi<<10) + (mfn<<10)/(mfd+1)))/(pd+1);
}
ulong get_FCLK(void)
{
return (( CSCR>>15)&1) ? get_mcuPLLCLK()>>1 : get_mcuPLLCLK();
}
/* return HCLK frequency */
ulong get_HCLK(void)
{
u32 bclkdiv = (( CSCR >> 10 ) & 0xf) + 1;
printf("bclkdiv: %d\n", bclkdiv);
return get_systemPLLCLK() / bclkdiv;
}
/* return BCLK frequency */
ulong get_BCLK(void)
{
return get_HCLK();
}
ulong get_PERCLK1(void)
{
return get_systemPLLCLK() / (((PCDR) & 0xf)+1);
}
ulong get_PERCLK2(void)
{
return get_systemPLLCLK() / (((PCDR>>4) & 0xf)+1);
}
ulong get_PERCLK3(void)
{
return get_systemPLLCLK() / (((PCDR>>16) & 0x7f)+1);
}
#endif /* defined (CONFIG_IMX) */
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