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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
*/
#include <common.h>
#include <command.h>
#include <asm/addrspace.h>
#include <asm/inca-ip.h>
extern uint incaip_get_cpuclk(void);
static ulong max_sdram_size(void)
{
/* The only supported SDRAM data width is 16bit.
*/
#define CFG_DW 2
/* The only supported number of SDRAM banks is 4.
*/
#define CFG_NB 4
ulong cfgpb0 = *INCA_IP_SDRAM_MC_CFGPB0;
int cols = cfgpb0 & 0xF;
int rows = (cfgpb0 & 0xF0) >> 4;
ulong size = (1 << (rows + cols)) * CFG_DW * CFG_NB;
return size;
}
long int initdram(int board_type)
{
int rows, cols, best_val = *INCA_IP_SDRAM_MC_CFGPB0;
ulong size, max_size = 0;
ulong our_address;
asm volatile ("move %0, $25" : "=r" (our_address) :);
/* Can't probe for RAM size unless we are running from Flash.
*/
if (PHYSADDR(our_address) < PHYSADDR(PHYS_FLASH_1))
{
return max_sdram_size();
}
for (cols = 0x8; cols <= 0xC; cols++)
{
for (rows = 0xB; rows <= 0xD; rows++)
{
*INCA_IP_SDRAM_MC_CFGPB0 = (0x14 << 8) |
(rows << 4) | cols;
size = get_ram_size((long *)CFG_SDRAM_BASE,
max_sdram_size());
if (size > max_size)
{
best_val = *INCA_IP_SDRAM_MC_CFGPB0;
max_size = size;
}
}
}
*INCA_IP_SDRAM_MC_CFGPB0 = best_val;
return max_size;
}
int checkboard (void)
{
unsigned long chipid = *INCA_IP_WDT_CHIPID;
int part_num;
puts ("Board: INCA-IP ");
part_num = (chipid >> 12) & 0xffff;
switch (part_num) {
case 0xc0:
printf ("Standard Version, ");
break;
case 0xc1:
printf ("Basic Version, ");
break;
default:
printf ("Unknown Part Number 0x%x ", part_num);
break;
}
printf ("Chip V1.%ld, ", (chipid >> 28));
printf("CPU Speed %d MHz\n", incaip_get_cpuclk()/1000000);
return 0;
}
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