diff options
Diffstat (limited to 'onenand_ipl/onenand_read.c')
| -rw-r--r-- | onenand_ipl/onenand_read.c | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/onenand_ipl/onenand_read.c b/onenand_ipl/onenand_read.c deleted file mode 100644 index 8d0df81..0000000 --- a/onenand_ipl/onenand_read.c +++ /dev/null @@ -1,158 +0,0 @@ -/* - * (C) Copyright 2005-2009 Samsung Electronics - * 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 - -int (*onenand_read_page)(ulong block, ulong page, u_char *buf, int pagesize); - -/* read a page with ECC */ -static int generic_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), - ONENAND_REG_START_ADDRESS1); - - onenand_writew(onenand_bufferram_address(block), - ONENAND_REG_START_ADDRESS2); - - onenand_writew(onenand_sector_address(page), - ONENAND_REG_START_ADDRESS8); - - onenand_writew(onenand_buffer_address(), - ONENAND_REG_START_BUFFER); - - onenand_writew(ONENAND_INT_CLEAR, ONENAND_REG_INTERRUPT); - - onenand_writew(ONENAND_CMD_READ, ONENAND_REG_COMMAND); - -#ifndef __HAVE_ARCH_MEMCPY32 - p = (unsigned long *) buf; -#endif - base = (unsigned long *) (CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM); - - while (!(READ_INTERRUPT() & ONENAND_INT_READ)) - continue; - - /* Check for invalid block mark */ - if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff)) - return 1; - -#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; -} - -#ifndef CONFIG_ONENAND_START_PAGE -#define CONFIG_ONENAND_START_PAGE 1 -#endif -#define ONENAND_PAGES_PER_BLOCK 64 - -static void onenand_generic_init(int *page_is_4KiB, int *page) -{ - int dev_id, density; - - if (onenand_readw(ONENAND_REG_TECHNOLOGY)) - *page_is_4KiB = 1; - dev_id = onenand_readw(ONENAND_REG_DEVICE_ID); - density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; - density &= ONENAND_DEVICE_DENSITY_MASK; - if (density >= ONENAND_DEVICE_DENSITY_4Gb && - !(dev_id & ONENAND_DEVICE_IS_DDP)) - *page_is_4KiB = 1; -} - -/** - * onenand_read_block - Read CONFIG_SYS_MONITOR_LEN from begining - * of OneNAND, skipping bad blocks - * @return 0 on success - */ -int onenand_read_block(unsigned char *buf) -{ - int block, nblocks; - int page = CONFIG_ONENAND_START_PAGE, offset = 0; - int pagesize, erasesize, erase_shift; - int page_is_4KiB = 0; - - onenand_read_page = generic_onenand_read_page; - - onenand_generic_init(&page_is_4KiB, &page); - - if (page_is_4KiB) { - pagesize = 4096; /* OneNAND has 4KiB pagesize */ - erase_shift = 18; - } else { - pagesize = 2048; /* OneNAND has 2KiB pagesize */ - erase_shift = 17; - } - - erasesize = (1 << erase_shift); - nblocks = (CONFIG_SYS_MONITOR_LEN + erasesize - 1) >> erase_shift; - - /* NOTE: you must read page from page 1 of block 0 */ - /* read the block page by page */ - for (block = 0; block < nblocks; block++) { - for (; page < ONENAND_PAGES_PER_BLOCK; page++) { - if (onenand_read_page(block, page, buf + offset, - pagesize)) { - /* This block is bad. Skip it - * and read next block */ - offset -= page * pagesize; - nblocks++; - break; - } - offset += pagesize; - } - page = 0; - } - - return 0; -} |