Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2005-2008 Samsung Electronis |
| 3 | * Kyungmin Park <kyungmin.park@samsung.com> |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | |
| 26 | #include <asm/io.h> |
| 27 | #include <asm/string.h> |
| 28 | |
| 29 | #include "onenand_ipl.h" |
| 30 | |
| 31 | #define onenand_block_address(block) (block) |
| 32 | #define onenand_sector_address(page) (page << 2) |
| 33 | #define onenand_buffer_address() ((1 << 3) << 8) |
| 34 | #define onenand_bufferram_address(block) (0) |
| 35 | |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 36 | #ifdef __HAVE_ARCH_MEMCPY32 |
| 37 | extern void *memcpy32(void *dest, void *src, int size); |
| 38 | #endif |
| 39 | |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 40 | /* read a page with ECC */ |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 41 | static inline int onenand_read_page(ulong block, ulong page, |
| 42 | u_char * buf, int pagesize) |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 43 | { |
| 44 | unsigned long *base; |
| 45 | |
| 46 | #ifndef __HAVE_ARCH_MEMCPY32 |
| 47 | unsigned int offset, value; |
| 48 | unsigned long *p; |
| 49 | #endif |
| 50 | |
| 51 | onenand_writew(onenand_block_address(block), |
| 52 | THIS_ONENAND(ONENAND_REG_START_ADDRESS1)); |
| 53 | |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 54 | onenand_writew(onenand_bufferram_address(block), |
| 55 | THIS_ONENAND(ONENAND_REG_START_ADDRESS2)); |
| 56 | |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 57 | onenand_writew(onenand_sector_address(page), |
| 58 | THIS_ONENAND(ONENAND_REG_START_ADDRESS8)); |
| 59 | |
| 60 | onenand_writew(onenand_buffer_address(), |
| 61 | THIS_ONENAND(ONENAND_REG_START_BUFFER)); |
| 62 | |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 63 | onenand_writew(ONENAND_INT_CLEAR, THIS_ONENAND(ONENAND_REG_INTERRUPT)); |
| 64 | |
| 65 | onenand_writew(ONENAND_CMD_READ, THIS_ONENAND(ONENAND_REG_COMMAND)); |
| 66 | |
| 67 | #ifndef __HAVE_ARCH_MEMCPY32 |
| 68 | p = (unsigned long *) buf; |
| 69 | #endif |
Jean-Christophe PLAGNIOL-VILLARD | 0383694 | 2008-10-16 15:01:15 +0200 | [diff] [blame] | 70 | base = (unsigned long *) (CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM); |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 71 | |
| 72 | while (!(READ_INTERRUPT() & ONENAND_INT_READ)) |
| 73 | continue; |
| 74 | |
| 75 | #ifdef __HAVE_ARCH_MEMCPY32 |
| 76 | /* 32 bytes boundary memory copy */ |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 77 | memcpy32(buf, base, pagesize); |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 78 | #else |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 79 | for (offset = 0; offset < (pagesize >> 2); offset++) { |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 80 | value = *(base + offset); |
| 81 | *p++ = value; |
| 82 | } |
| 83 | #endif |
| 84 | |
| 85 | return 0; |
| 86 | } |
| 87 | |
| 88 | #define ONENAND_START_PAGE 1 |
| 89 | #define ONENAND_PAGES_PER_BLOCK 64 |
| 90 | |
| 91 | /** |
| 92 | * onenand_read_block - Read a block data to buf |
| 93 | * @return 0 on success |
| 94 | */ |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 95 | int onenand_read_block0(unsigned char *buf) |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 96 | { |
| 97 | int page, offset = 0; |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 98 | int pagesize = ONENAND_PAGE_SIZE; |
| 99 | |
| 100 | /* MLC OneNAND has 4KiB page size */ |
| 101 | if (onenand_readw(THIS_ONENAND(ONENAND_REG_TECHNOLOGY))) |
| 102 | pagesize <<= 1; |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 103 | |
| 104 | /* NOTE: you must read page from page 1 of block 0 */ |
| 105 | /* read the block page by page*/ |
| 106 | for (page = ONENAND_START_PAGE; |
| 107 | page < ONENAND_PAGES_PER_BLOCK; page++) { |
| 108 | |
Kyungmin Park | 05d2318 | 2008-03-17 08:54:06 +0900 | [diff] [blame] | 109 | onenand_read_page(0, page, buf + offset, pagesize); |
| 110 | offset += pagesize; |
Kyungmin Park | 3317421 | 2008-01-17 16:43:25 +0900 | [diff] [blame] | 111 | } |
| 112 | |
| 113 | return 0; |
| 114 | } |