2 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
5 * Copyright (C) 2005-2009 Samsung Electronics
6 * Kyungmin Park <kyungmin.park@samsung.com>
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 #include <linux/mtd/onenand_regs.h>
30 #include <onenand_uboot.h>
34 * - 2048b page, 128k erase block.
35 * - 4096b page, 256k erase block.
37 enum onenand_spl_pagesize {
42 #define ONENAND_PAGES_PER_BLOCK 64
43 #define onenand_block_address(block) (block)
44 #define onenand_sector_address(page) (page << 2)
45 #define onenand_buffer_address() ((1 << 3) << 8)
46 #define onenand_bufferram_address(block) (0)
48 static inline uint16_t onenand_readw(uint32_t addr)
50 return readw(CONFIG_SYS_ONENAND_BASE + addr);
53 static inline void onenand_writew(uint16_t value, uint32_t addr)
55 writew(value, CONFIG_SYS_ONENAND_BASE + addr);
58 static enum onenand_spl_pagesize onenand_spl_get_geometry(void)
60 uint32_t dev_id, density;
62 if (!onenand_readw(ONENAND_REG_TECHNOLOGY)) {
63 dev_id = onenand_readw(ONENAND_REG_DEVICE_ID);
64 density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
65 density &= ONENAND_DEVICE_DENSITY_MASK;
67 if (density < ONENAND_DEVICE_DENSITY_4Gb)
70 if (dev_id & ONENAND_DEVICE_IS_DDP)
77 static int onenand_spl_read_page(uint32_t block, uint32_t page, uint32_t *buf,
78 enum onenand_spl_pagesize pagesize)
80 const uint32_t addr = CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM;
83 onenand_writew(onenand_block_address(block),
84 ONENAND_REG_START_ADDRESS1);
86 onenand_writew(onenand_bufferram_address(block),
87 ONENAND_REG_START_ADDRESS2);
89 onenand_writew(onenand_sector_address(page),
90 ONENAND_REG_START_ADDRESS8);
92 onenand_writew(onenand_buffer_address(),
93 ONENAND_REG_START_BUFFER);
95 onenand_writew(ONENAND_INT_CLEAR, ONENAND_REG_INTERRUPT);
97 onenand_writew(ONENAND_CMD_READ, ONENAND_REG_COMMAND);
99 while (!(onenand_readw(ONENAND_REG_INTERRUPT) & ONENAND_INT_READ))
102 /* Check for invalid block mark */
103 if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff))
106 for (offset = 0; offset < pagesize; offset += 4)
107 buf[offset / 4] = readl(addr + offset);
112 void onenand_spl_load_image(uint32_t offs, uint32_t size, void *dst)
114 uint32_t *addr = (uint32_t *)dst;
115 uint32_t total_pages;
117 uint32_t page, rpage;
118 enum onenand_spl_pagesize pagesize;
121 pagesize = onenand_spl_get_geometry();
124 * The page can be either 2k or 4k, avoid using DIV_ROUND_UP to avoid
125 * pulling further unwanted functions into the SPL.
127 if (pagesize == 2048) {
128 total_pages = DIV_ROUND_UP(size, 2048);
131 total_pages = DIV_ROUND_UP(size, 4096);
135 for (; page <= total_pages; page++) {
136 block = page / ONENAND_PAGES_PER_BLOCK;
137 rpage = page & (ONENAND_PAGES_PER_BLOCK - 1);
138 ret = onenand_spl_read_page(block, rpage, addr, pagesize);
140 total_pages += ONENAND_PAGES_PER_BLOCK;
141 page += ONENAND_PAGES_PER_BLOCK - 1;
143 addr += pagesize / 4;