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/*
* (C) Copyright 2007
* Stefan Roese, DENX Software Engineering, sr@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/processor.h>
#include <ppc405.h>
/* test-only: move into cpu directory!!! */
#if defined(PLLMR0_200_133_66)
void board_pll_init_f(void)
{
/*
* set PLL clocks based on input sysclk is 33M
*
* ----------------------------------
* | CLK | FREQ (MHz) | DIV RATIO |
* ----------------------------------
* | CPU | 200.0 | 4 (0x02)|
* | PLB | 133.3 | 6 (0x06)|
* | OPB | 66.6 | 12 (0x0C)|
* | EBC | 66.6 | 12 (0x0C)|
* | SPI | 66.6 | 12 (0x0C)|
* | UART0 | 10.0 | 40 (0x28)|
* | UART1 | 10.0 | 40 (0x28)|
* | DAC | 2.0 | 200 (0xC8)|
* | ADC | 2.0 | 200 (0xC8)|
* | PWM | 100.0 | 4 (0x04)|
* | EMAC | 25.0 | 16 (0x10)|
* -----------------------------------
*/
/* Initialize PLL */
mtcpr(cprpllc, 0x0000033c);
mtcpr(cprplld, 0x0c010200);
mtcpr(cprprimad, 0x04060c0c);
mtcpr(cprperd0, 0x000c0000); /* SPI clk div. eq. OPB clk div. */
mtcpr(cprclkupd, 0x40000000);
}
#elif defined(PLLMR0_266_160_80)
void board_pll_init_f(void)
{
/*
* set PLL clocks based on input sysclk is 33M
*
* ----------------------------------
* | CLK | FREQ (MHz) | DIV RATIO |
* ----------------------------------
* | CPU | 266.64 | 3 |
* | PLB | 159.98 | 5 (0x05)|
* | OPB | 79.99 | 10 (0x0A)|
* | EBC | 79.99 | 10 (0x0A)|
* | SPI | 79.99 | 10 (0x0A)|
* | UART0 | 28.57 | 7 (0x07)|
* | UART1 | 28.57 | 7 (0x07)|
* | DAC | 28.57 | 7 (0xA7)|
* | ADC | 4 | 50 (0x32)|
* | PWM | 28.57 | 7 (0x07)|
* | EMAC | 4 | 50 (0x32)|
* -----------------------------------
*/
/* Initialize PLL */
mtcpr(cprpllc, 0x20000238);
mtcpr(cprplld, 0x03010400);
mtcpr(cprprimad, 0x03050a0a);
mtcpr(cprperc0, 0x00000000);
mtcpr(cprperd0, 0x070a0707); /* SPI clk div. eq. OPB clk div. */
mtcpr(cprperd1, 0x07323200);
mtcpr(cprclkupd, 0x40000000);
}
#elif defined(PLLMR0_333_166_83)
void board_pll_init_f(void)
{
/*
* set PLL clocks based on input sysclk is 33M
*
* ----------------------------------
* | CLK | FREQ (MHz) | DIV RATIO |
* ----------------------------------
* | CPU | 333.33 | 2 |
* | PLB | 166.66 | 4 (0x04)|
* | OPB | 83.33 | 8 (0x08)|
* | EBC | 83.33 | 8 (0x08)|
* | SPI | 83.33 | 8 (0x08)|
* | UART0 | 16.66 | 5 (0x05)|
* | UART1 | 16.66 | 5 (0x05)|
* | DAC | ???? | 166 (0xA6)|
* | ADC | ???? | 166 (0xA6)|
* | PWM | 41.66 | 3 (0x03)|
* | EMAC | ???? | 3 (0x03)|
* -----------------------------------
*/
/* Initialize PLL */
mtcpr(cprpllc, 0x0000033C);
mtcpr(cprplld, 0x0a010000);
mtcpr(cprprimad, 0x02040808);
mtcpr(cprperd0, 0x02080505); /* SPI clk div. eq. OPB clk div. */
mtcpr(cprperd1, 0xA6A60300);
mtcpr(cprclkupd, 0x40000000);
}
#elif defined(PLLMR0_100_100_12)
void board_pll_init_f(void)
{
/*
* set PLL clocks based on input sysclk is 33M
*
* ----------------------
* | CLK | FREQ (MHz) |
* ----------------------
* | CPU | 100.00 |
* | PLB | 100.00 |
* | OPB | 12.00 |
* | EBC | 49.00 |
* ----------------------
*/
/* Initialize PLL */
mtcpr(cprpllc, 0x000003BC);
mtcpr(cprplld, 0x06060600);
mtcpr(cprprimad, 0x02020004);
mtcpr(cprperd0, 0x04002828); /* SPI clk div. eq. OPB clk div. */
mtcpr(cprperd1, 0xC8C81600);
mtcpr(cprclkupd, 0x40000000);
}
#endif /* CPU_<speed>_405EZ */
#if defined(CONFIG_NAND_SPL) || defined(CONFIG_SPI_SPL)
/*
* Get timebase clock frequency
*/
unsigned long get_tbclk(void)
{
unsigned long cpr_plld;
unsigned long cpr_primad;
unsigned long primad_cpudv;
unsigned long pllFbkDiv;
unsigned long freqProcessor;
/*
* Read PLL Mode registers
*/
mfcpr(cprplld, cpr_plld);
/*
* Read CPR_PRIMAD register
*/
mfcpr(cprprimad, cpr_primad);
/*
* Determine CPU clock frequency
*/
primad_cpudv = ((cpr_primad & PRIMAD_CPUDV_MASK) >> 24);
if (primad_cpudv == 0)
primad_cpudv = 16;
/*
* Determine FBK_DIV.
*/
pllFbkDiv = ((cpr_plld & PLLD_FBDV_MASK) >> 24);
if (pllFbkDiv == 0)
pllFbkDiv = 256;
freqProcessor = (CONFIG_SYS_CLK_FREQ * pllFbkDiv) / primad_cpudv;
return (freqProcessor);
}
#endif /* defined(CONFIG_NAND_SPL) || defined(CONFIG_SPI_SPL) */
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