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/*
* (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
*
* 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/io.h>
#include "vct.h"
static u32 ebi_read(u32 addr)
{
addr &= ~0xFC000000;
reg_write(EBI_CPU_IO_ACCS(EBI_BASE), EXT_DEVICE_CHANNEL_2 | addr);
ebi_wait();
return reg_read(EBI_IO_ACCS_DATA(EBI_BASE));
}
static int ebi_write_u16(u32 addr, u32 data, int fetchIO)
{
u32 val = (data << 16);
addr &= ~0xFC000000;
ebi_wait();
reg_write(EBI_IO_ACCS_DATA(EBI_BASE), val);
reg_write(EBI_CPU_IO_ACCS(EBI_BASE),
EXT_DEVICE_CHANNEL_2 | EBI_CPU_WRITE | addr);
ebi_wait();
if (fetchIO) {
u32 counter = 0;
while (!(reg_read(EBI_SIG_LEVEL(EBI_BASE)) & EXT_CPU_IORDY_SL)) {
if (counter++ > 0xFFFFFF)
return 1;
}
}
return 0;
}
static u16 ebi_read_u16(u32 addr)
{
return ((ebi_read(addr) >> 16) & 0xFFFF);
}
static u8 ebi_read_u8(u32 addr)
{
u32 val = ebi_read(addr) >> 16;
if (addr & 0x1)
return val & 0xff;
else
return (val >> 8) & 0xff;
}
/*
* EBI initialization for NOR FLASH access
*/
int ebi_init_nor_flash(void)
{
reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000);
reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x400002);
reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50);
reg_write(EBI_DEV2_TIM1_RD1(EBI_BASE), 0x409113);
reg_write(EBI_DEV2_TIM1_RD2(EBI_BASE), 0xFF01000);
reg_write(EBI_DEV2_TIM1_WR1(EBI_BASE), 0x04003113);
reg_write(EBI_DEV2_TIM1_WR2(EBI_BASE), 0x3FC12011);
reg_write(EBI_DEV2_TIM_EXT(EBI_BASE), 0xFFF00000);
return 0;
}
/*
* Accessor functions replacing the "weak" functions in
* drivers/mtd/cfi_flash.c
*/
void flash_write8(u8 value, void *addr)
{
ebi_write_u16((u32)addr, value, 0);
}
void flash_write16(u16 value, void *addr)
{
ebi_write_u16((u32)addr, value, 0);
}
u8 flash_read8(void *addr)
{
return ebi_read_u8((u32)addr);
}
u16 flash_read16(void *addr)
{
return ebi_read_u16((u32)addr);
}
u32 flash_read32(void *addr)
{
return ((u32)ebi_read_u16((u32)addr) << 16) |
ebi_read_u16((u32)addr + 2);
}
void *board_flash_read_memcpy(void *dest, const void *src, size_t count)
{
u16 *tmp = (u16 *)dest, *s = (u16 *)src;
int i;
for (i = 0; i < count; i += 2)
*tmp++ = flash_read16(s++);
return dest;
}
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