129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
/*
|
|
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
|
|
*
|
|
* Based on code:
|
|
* Copyright (C) 2005-2009 Samsung Electronics
|
|
* Kyungmin Park <kyungmin.park@samsung.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <linux/mtd/onenand_regs.h>
|
|
#include <onenand_uboot.h>
|
|
|
|
/*
|
|
* Device geometry:
|
|
* - 2048b page, 128k erase block.
|
|
* - 4096b page, 256k erase block.
|
|
*/
|
|
enum onenand_spl_pagesize {
|
|
PAGE_2K = 2048,
|
|
PAGE_4K = 4096,
|
|
};
|
|
|
|
#define ONENAND_PAGES_PER_BLOCK 64
|
|
#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)
|
|
|
|
static inline uint16_t onenand_readw(uint32_t addr)
|
|
{
|
|
return readw(CONFIG_SYS_ONENAND_BASE + addr);
|
|
}
|
|
|
|
static inline void onenand_writew(uint16_t value, uint32_t addr)
|
|
{
|
|
writew(value, CONFIG_SYS_ONENAND_BASE + addr);
|
|
}
|
|
|
|
static enum onenand_spl_pagesize onenand_spl_get_geometry(void)
|
|
{
|
|
uint32_t dev_id, density;
|
|
|
|
if (!onenand_readw(ONENAND_REG_TECHNOLOGY)) {
|
|
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)
|
|
return PAGE_2K;
|
|
|
|
if (dev_id & ONENAND_DEVICE_IS_DDP)
|
|
return PAGE_2K;
|
|
}
|
|
|
|
return PAGE_4K;
|
|
}
|
|
|
|
static int onenand_spl_read_page(uint32_t block, uint32_t page, uint32_t *buf,
|
|
enum onenand_spl_pagesize pagesize)
|
|
{
|
|
const uint32_t addr = CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM;
|
|
uint32_t offset;
|
|
|
|
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);
|
|
|
|
while (!(onenand_readw(ONENAND_REG_INTERRUPT) & ONENAND_INT_READ))
|
|
continue;
|
|
|
|
/* Check for invalid block mark */
|
|
if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff))
|
|
return 1;
|
|
|
|
for (offset = 0; offset < pagesize; offset += 4)
|
|
buf[offset / 4] = readl(addr + offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void onenand_spl_load_image(uint32_t offs, uint32_t size, void *dst)
|
|
{
|
|
uint32_t *addr = (uint32_t *)dst;
|
|
uint32_t to_page;
|
|
uint32_t block;
|
|
uint32_t page, rpage;
|
|
enum onenand_spl_pagesize pagesize;
|
|
int ret;
|
|
|
|
pagesize = onenand_spl_get_geometry();
|
|
|
|
/*
|
|
* The page can be either 2k or 4k, avoid using DIV_ROUND_UP to avoid
|
|
* pulling further unwanted functions into the SPL.
|
|
*/
|
|
if (pagesize == 2048) {
|
|
page = offs / 2048;
|
|
to_page = page + DIV_ROUND_UP(size, 2048);
|
|
} else {
|
|
page = offs / 4096;
|
|
to_page = page + DIV_ROUND_UP(size, 4096);
|
|
}
|
|
|
|
for (; page <= to_page; page++) {
|
|
block = page / ONENAND_PAGES_PER_BLOCK;
|
|
rpage = page & (ONENAND_PAGES_PER_BLOCK - 1);
|
|
ret = onenand_spl_read_page(block, rpage, addr, pagesize);
|
|
if (ret)
|
|
page += ONENAND_PAGES_PER_BLOCK - 1;
|
|
else
|
|
addr += pagesize / 4;
|
|
}
|
|
}
|