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/*
* (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
*/
/*
* Yoo. Jonghoon, IPone, yooth@ipone.co.kr
* PPCboot port on RPXlite board
*
* DRAM related UPMA register values are modified.
* See RPXLite engineering note : 50MHz/60ns - UPM RAM WORDS
*/
#include <common.h>
#include "mpc8xx.h"
/* ------------------------------------------------------------------------- */
static long int dram_size (void);
/* ------------------------------------------------------------------------- */
#define MBYTE (1024*1024)
#define DRAM_DELAY 0x00000379 /* DRAM delay count */
#define _NOT_USED_ 0xFFFFCC25
const uint sdram_table[] =
{
/* single read. (offset 0 in upm RAM) */
0x1F07D004, 0xEEAEE004, 0x11ADD004, 0xEFBBA000,
0x1FF75447, 0x1FF77C34, 0xEFEABC34, 0x1FB57C35,
/* burst read. (Offset 8 in upm RAM) */
0x1F07D004, 0xEEAEE004, 0x00ADC004, 0x00AFC000,
0x00AFC000, 0x01AFC000, 0x0FBB8000, 0x1FF75447,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* single write. (Offset 0x18 in upm RAM) */
0x1F27D004, 0xEEAEA000, 0x01B90004, 0x1FF75447,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* burst write. (Offset 0x20 in upm RAM) */
0x1F07D004, 0xEEAEA000, 0x00AD4000, 0x00AFC000,
0x00AFC000, 0x01BB8004, 0x1FF75447, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Refresh cycle, offset 0x30 */
0x1FF5DC84, 0xFFFFFC04, 0xFFFFFC04, 0xFFFFFC04,
0xFFFFFC84, 0xFFFFFC07, 0xFFFFFFFF, 0xFFFFFFFF,
0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
/* Exception, 0ffset 0x3C */
0x7FFFFC07, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF,
};
/* ------------------------------------------------------------------------- */
/*
* Check Board Identity:
*
* Return 1 for now.
*
*/
int checkboard (void)
{
printf("Marel V37\n") ;
return (0) ;
}
/* ------------------------------------------------------------------------- */
long int initdram (int board_type)
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile memctl8xx_t *memctl = &immap->im_memctl;
unsigned long temp;
volatile int delay_cnt;
long int ramsize;
ramsize = dram_size();
/* Refresh clock prescalar */
memctl->memc_mptpr = 0x400 ;
if( ramsize == 32*MBYTE )
temp = 0xd0904110;
else /* 16MB */
temp = 0xd0802110;
memctl->memc_mbmr = temp;
upmconfig(UPMB, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));
/* Map controller banks 2 to the SDRAM bank */
memctl->memc_or2 = 0xA00 | (0 - ramsize);
memctl->memc_br2 = 0xC1;
memctl->memc_mbmr = temp | 0x08;
memctl->memc_mcr = 0x80804130;
delay_cnt = 0;
while( delay_cnt++ < DRAM_DELAY )
;
/* Run MRS command in location 5-8 of UPMB */
memctl->memc_mbmr = temp | 0x04;
memctl->memc_mar = 0x88;
memctl->memc_mcr = 0x80804105;
delay_cnt = 0;
while( delay_cnt++ < DRAM_DELAY )
;
#ifdef CONFIG_CAN_DRIVER
/* Initialize OR3 / BR3 */
memctl->memc_or3 = CFG_OR3_CAN;
memctl->memc_br3 = CFG_BR3_CAN;
/* Initialize MBMR */
memctl->memc_mamr = MAMR_GPL_B4DIS; /* GPL_B4 ouput line Disable */
/* Initialize UPMB for CAN: single read */
memctl->memc_mdr = 0xFFFFC004;
memctl->memc_mcr = 0x0100 | UPMA;
memctl->memc_mdr = 0x0FFFD004;
memctl->memc_mcr = 0x0101 | UPMA;
memctl->memc_mdr = 0x0FFFC000;
memctl->memc_mcr = 0x0102 | UPMA;
memctl->memc_mdr = 0x3FFFC004;
memctl->memc_mcr = 0x0103 | UPMA;
memctl->memc_mdr = 0xFFFFDC05;
memctl->memc_mcr = 0x0104 | UPMA;
/* Initialize UPMB for CAN: single write */
memctl->memc_mdr = 0xFFFCC004;
memctl->memc_mcr = 0x0118 | UPMA;
memctl->memc_mdr = 0xCFFCD004;
memctl->memc_mcr = 0x0119 | UPMA;
memctl->memc_mdr = 0x0FFCC000;
memctl->memc_mcr = 0x011A | UPMA;
memctl->memc_mdr = 0x7FFCC004;
memctl->memc_mcr = 0x011B | UPMA;
memctl->memc_mdr = 0xFFFDCC05;
memctl->memc_mcr = 0x011C | UPMA;
#endif /* CONFIG_CAN_DRIVER */
return (dram_size());
}
/* ------------------------------------------------------------------------- */
/*
* Find size of RAM from configuration pins.
* The input pins that contain the memory size are also the debug port
* pins. Normally they are configured as debug port pins. To be able
* to read the memory configuration, we must deactivate the debug port
* and enable the pcmcia input pins. Then return the register to
* previous state.
*/
static long int dram_size ()
{
volatile immap_t *immap = (immap_t *)CFG_IMMR;
volatile sysconf8xx_t *siu = &immap->im_siu_conf;
volatile pcmconf8xx_t *pcm = &immap->im_pcmcia;
long int i, memory=1;
unsigned long siu_mcr;
siu_mcr = siu->sc_siumcr;
siu->sc_siumcr = siu_mcr & 0xFF9FFFFF;
for(i=0; i<10; i++) i = i;
memory = (pcm->pcmc_pipr>>12) & 0x3;
siu->sc_siumcr = siu_mcr;
switch( memory )
{
case 1:
return( 32*MBYTE );
case 2:
return( 64*MBYTE );
default:
break;
}
return( 16*MBYTE );
}
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