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/*
* 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.
*
*/
/**
* @file
* @brief Basic clock, sdram and timer handling for S3C24xx CPUs
*/
#include <config.h>
#include <common.h>
#include <init.h>
#include <clock.h>
#include <io.h>
#include <sizes.h>
#include <mach/s3c-iomap.h>
#include <mach/s3c-generic.h>
#include <mach/s3c-busctl.h>
#include <mach/s3c24xx-gpio.h>
/**
* Calculate the amount of connected and available memory
* @return Memory size in bytes
*/
uint32_t s3c24xx_get_memory_size(void)
{
uint32_t reg, size;
/*
* detect the current memory size
*/
reg = readl(S3C_BANKSIZE);
switch (reg & 0x7) {
case 0:
size = SZ_32M;
break;
case 1:
size = SZ_64M;
break;
case 2:
size = SZ_128M;
break;
case 4:
size = SZ_2M;
break;
case 5:
size = SZ_4M;
break;
case 6:
size = SZ_8M;
break;
default:
size = SZ_16M;
break;
}
/*
* Is bank7 also configured for SDRAM usage?
*/
if ((readl(S3C_BANKCON7) & (0x3 << 15)) == (0x3 << 15))
size <<= 1; /* also count this bank */
return size;
}
void s3c24xx_disable_second_sdram_bank(void)
{
writel(readl(S3C_BANKCON7) & ~(0x3 << 15), S3C_BANKCON7);
writel(readl(S3C_MISCCR) | (1 << 18), S3C_MISCCR); /* disable its clock */
}
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