mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
1bb707c39a
Flex-OneNAND is a monolithic integrated circuit with a NAND Flash array using a NOR Flash interface. This on-chip integration enables system designers to reduce external system logic and use high-density NAND Flash in applications that would otherwise have to use more NOR components. Flex-OneNAND enables users to configure to partition it into SLC and MLC areas in more flexible way. While MLC area of Flex-OneNAND can be used to store data that require low reliability and high density, SLC area of Flex-OneNAND to store data that need high reliability and high performance. Flex-OneNAND can let users take advantage of storing these two different types of data into one chip, which is making Flex-OneNAND more cost- and space-effective. Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
114 lines
3 KiB
C
114 lines
3 KiB
C
/*
|
|
* (C) Copyright 2005-2008 Samsung Electronis
|
|
* Kyungmin Park <kyungmin.park@samsung.com>
|
|
*
|
|
* 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 <asm/io.h>
|
|
#include <asm/string.h>
|
|
|
|
#include "onenand_ipl.h"
|
|
|
|
#define onenand_block_address(block) (block)
|
|
#define onenand_sector_address(page) (page << 2)
|
|
#define onenand_buffer_address() ((1 << 3) << 8)
|
|
#define onenand_bufferram_address(block) (0)
|
|
|
|
#ifdef __HAVE_ARCH_MEMCPY32
|
|
extern void *memcpy32(void *dest, void *src, int size);
|
|
#endif
|
|
|
|
/* read a page with ECC */
|
|
static inline int onenand_read_page(ulong block, ulong page,
|
|
u_char * buf, int pagesize)
|
|
{
|
|
unsigned long *base;
|
|
|
|
#ifndef __HAVE_ARCH_MEMCPY32
|
|
unsigned int offset, value;
|
|
unsigned long *p;
|
|
#endif
|
|
|
|
onenand_writew(onenand_block_address(block),
|
|
THIS_ONENAND(ONENAND_REG_START_ADDRESS1));
|
|
|
|
onenand_writew(onenand_bufferram_address(block),
|
|
THIS_ONENAND(ONENAND_REG_START_ADDRESS2));
|
|
|
|
onenand_writew(onenand_sector_address(page),
|
|
THIS_ONENAND(ONENAND_REG_START_ADDRESS8));
|
|
|
|
onenand_writew(onenand_buffer_address(),
|
|
THIS_ONENAND(ONENAND_REG_START_BUFFER));
|
|
|
|
onenand_writew(ONENAND_INT_CLEAR, THIS_ONENAND(ONENAND_REG_INTERRUPT));
|
|
|
|
onenand_writew(ONENAND_CMD_READ, THIS_ONENAND(ONENAND_REG_COMMAND));
|
|
|
|
#ifndef __HAVE_ARCH_MEMCPY32
|
|
p = (unsigned long *) buf;
|
|
#endif
|
|
base = (unsigned long *) (CFG_ONENAND_BASE + ONENAND_DATARAM);
|
|
|
|
while (!(READ_INTERRUPT() & ONENAND_INT_READ))
|
|
continue;
|
|
|
|
#ifdef __HAVE_ARCH_MEMCPY32
|
|
/* 32 bytes boundary memory copy */
|
|
memcpy32(buf, base, pagesize);
|
|
#else
|
|
for (offset = 0; offset < (pagesize >> 2); offset++) {
|
|
value = *(base + offset);
|
|
*p++ = value;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define ONENAND_START_PAGE 1
|
|
#define ONENAND_PAGES_PER_BLOCK 64
|
|
|
|
/**
|
|
* onenand_read_block - Read a block data to buf
|
|
* @return 0 on success
|
|
*/
|
|
int onenand_read_block0(unsigned char *buf)
|
|
{
|
|
int page, offset = 0;
|
|
int pagesize = ONENAND_PAGE_SIZE;
|
|
|
|
/* MLC OneNAND has 4KiB page size */
|
|
if (onenand_readw(THIS_ONENAND(ONENAND_REG_TECHNOLOGY)))
|
|
pagesize <<= 1;
|
|
|
|
/* NOTE: you must read page from page 1 of block 0 */
|
|
/* read the block page by page*/
|
|
for (page = ONENAND_START_PAGE;
|
|
page < ONENAND_PAGES_PER_BLOCK; page++) {
|
|
|
|
onenand_read_page(0, page, buf + offset, pagesize);
|
|
offset += pagesize;
|
|
}
|
|
|
|
return 0;
|
|
}
|