mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 16:39:35 +00:00
131 lines
2.8 KiB
C
131 lines
2.8 KiB
C
/*
|
|
* (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;
|
|
}
|