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 * SPDX-License-Identifier: GPL-2.0+
13 #include <linux/mtd/onenand_regs.h>
14 #include <onenand_uboot.h>
18 * - 2048b page, 128k erase block.
19 * - 4096b page, 256k erase block.
21 enum onenand_spl_pagesize {
26 #define ONENAND_PAGES_PER_BLOCK 64
27 #define onenand_block_address(block) (block)
28 #define onenand_sector_address(page) (page << 2)
29 #define onenand_buffer_address() ((1 << 3) << 8)
30 #define onenand_bufferram_address(block) (0)
32 static inline uint16_t onenand_readw(uint32_t addr)
34 return readw(CONFIG_SYS_ONENAND_BASE + addr);
37 static inline void onenand_writew(uint16_t value, uint32_t addr)
39 writew(value, CONFIG_SYS_ONENAND_BASE + addr);
42 static enum onenand_spl_pagesize onenand_spl_get_geometry(void)
44 uint32_t dev_id, density;
46 if (!onenand_readw(ONENAND_REG_TECHNOLOGY)) {
47 dev_id = onenand_readw(ONENAND_REG_DEVICE_ID);
48 density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
49 density &= ONENAND_DEVICE_DENSITY_MASK;
51 if (density < ONENAND_DEVICE_DENSITY_4Gb)
54 if (dev_id & ONENAND_DEVICE_IS_DDP)
61 static int onenand_spl_read_page(uint32_t block, uint32_t page, uint32_t *buf,
62 enum onenand_spl_pagesize pagesize)
64 const uint32_t addr = CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM;
67 onenand_writew(onenand_block_address(block),
68 ONENAND_REG_START_ADDRESS1);
70 onenand_writew(onenand_bufferram_address(block),
71 ONENAND_REG_START_ADDRESS2);
73 onenand_writew(onenand_sector_address(page),
74 ONENAND_REG_START_ADDRESS8);
76 onenand_writew(onenand_buffer_address(),
77 ONENAND_REG_START_BUFFER);
79 onenand_writew(ONENAND_INT_CLEAR, ONENAND_REG_INTERRUPT);
81 onenand_writew(ONENAND_CMD_READ, ONENAND_REG_COMMAND);
83 while (!(onenand_readw(ONENAND_REG_INTERRUPT) & ONENAND_INT_READ))
86 /* Check for invalid block mark */
87 if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff))
90 for (offset = 0; offset < pagesize; offset += 4)
91 buf[offset / 4] = readl(addr + offset);
96 void onenand_spl_load_image(uint32_t offs, uint32_t size, void *dst)
98 uint32_t *addr = (uint32_t *)dst;
101 uint32_t page, rpage;
102 enum onenand_spl_pagesize pagesize;
105 pagesize = onenand_spl_get_geometry();
108 * The page can be either 2k or 4k, avoid using DIV_ROUND_UP to avoid
109 * pulling further unwanted functions into the SPL.
111 if (pagesize == 2048) {
113 to_page = page + DIV_ROUND_UP(size, 2048);
116 to_page = page + DIV_ROUND_UP(size, 4096);
119 for (; page <= to_page; page++) {
120 block = page / ONENAND_PAGES_PER_BLOCK;
121 rpage = page & (ONENAND_PAGES_PER_BLOCK - 1);
122 ret = onenand_spl_read_page(block, rpage, addr, pagesize);
124 page += ONENAND_PAGES_PER_BLOCK - 1;
126 addr += pagesize / 4;